Thursday, October 31, 2019

The Future of Privacy Essay Example | Topics and Well Written Essays - 250 words

The Future of Privacy - Essay Example Systemic instruments come from the engineering process from networks to machines to computers to codes to protocols. These are the systems that are built into machines. Collective instruments come from government policy applied to provide protection of goods and services. These are the instruments that are built into processes. The instrument of individual empowerment requires individuals to implement privacy-enhancement during online transactions. This is the instrument of choice. There will not be one-size-fits-all solution, though. PET should be thought of as toolkit. Each tool serves a particular purpose, but when combined, they achieve more than the sum of their parts. PET may be implemented such that the deficiencies of one are covered by the strengths of another (Raab 2004). Countrywide has the option to build security measures around systemic, political, and behavioral instruments. Combine such efforts enhances the effectiveness of each. It is in the interests of Countrywide Financial Corporation to develop practices to preserve client and corporate privacy (Countrywide 2009). Raab, C.D. (2004). The future of privacy protection.

Tuesday, October 29, 2019

Nurture as Predictor of Happiness Essay Example for Free

Nurture as Predictor of Happiness Essay Nature versus Nurture as Predictor of Happiness Introduction            Happiness is one trait that is quite difficult to define and explain in human beings since different people have different things which they feel brings happiness to them which may be the complete opposite in other people (Phoenix, 2007, pp.104). One thing that may raise positive emotions in one individual may raise the opposite negative emotions in another person, hence making it quite difficult to have a clear cut definition of happiness. This tends to raise the question of what exactly always makes one happy and what are the relative importances of nature versus nurture as predictor of happiness in human beings. According to Phoenix (2007), â€Å"The behavior of people and other animals cannot be understood without taking account of the influence of their environments as well as their biology† (Phoenix, 2007, p.104). This means that happiness as part of human beings can be an influence of nature or nurture as the main predictors of the happiness of an individual. People who conducted research and came up with the various cause of happiness or the predictors of happiness must have experienced happiness at one point during their lifetime (Spoors, et al, 2007, pp.5).            This could simply indicate that every human being has the chance and opportunity of experiencing happiness in the life at one point. It is not quite easy to provide a straight forward definition of happiness which can be used in general at any time when there is reference to be made concerni8ng happiness. However, happiness may be said to be simply a form of mood which is affirmative and tends to cover a certain variety of emotions which may range from being delighted or even satisfied and conversely (Spoors, et al, 2007, pp.5). The above definition is totally opposed to the dichotomy, because the dichotomy is divided into two parts, for example, joy and sorrow, which are mutually exclusive and simultaneously create a whole. A proven example is a wedding the bride’s. Mother cries for daughter’s wedding, but simultaneously she has joy in it. This happiness is associated with feelings and emotions that people feel the depending on the situation in which they find themselves. In correlation with this, it can be accomplished of happiness and unhappiness cannot be viewed as opposite or mutually exclusive† (Spoors, et al, 2007, pp.5).            According to the assumptions of this concept, the pursuit of happiness, which you want each person is driven by human activities, and at the same time a source of satisfaction, fulfillment, and sometimes a sense of success. Therefore, the benefits associated with happiness include; better health, well-being, a lot greater activity level, willingness to help, and better relationships with others. People who are considered to be unhappy tend not to have the above mentioned emotions and they rarely display such emotions since they have not been able to experience happiness, or even the activities which causes happiness in human beings (Spoors, et al, 2007, pp.5).            When a question is asked about what makes hu8mna beings happy, most of the people would put main focus on the kind of thoughts they have, the kind of relationships that they have which can include close relationships and those that are not close. Furthermore, the question on what makes one happy will also make one to put focus on the brains since it is the one that generates the thoughts which in turn are closely related to the relationships that people have. The factors which act as the determinants of happiness have nature and to some extent have nurture. A healthy lifestyle and a happy brain this nurture issues, because in order for us to have a sense of wellbeing and happiness, our brains and bodies need a consistent source of food and oxygen† (Spoors at al., 2007, pp.26 9, material).            Therefore, it can be agreed that the main causes of happiness which have been suggested as most common include the relationships, the brain and the thoughts. Spoors (2007) observes that for human beings to have a sense of happiness or even well being, they must be able to live a healthy lifestyle as well as have constant supply of oxygen for the functioning of the body and the brain. Furthermore, â€Å"Many people on high protein, high fat, low carbohydrate diets have reported unusually high feelings of anger, tension and depression†, as observed by Spoors (2007). This means that for one to feel happy or have the sense of well being, they must have sufficient balanced diet and also constant supply of oxygen for a healthy body and a healthy brain.            From research conducted by Davidson, people inherit some genes which make one have a genetic predisposition of happiness to a certain level, although this does not mean that there are people who are born unhappy or gloom while others are born happy (Spoors, et al, pp.26-9). According to Shakespeare (2005 edition), â€Å"There is nothing either good or bad, but thinking makes it so†, meaning that what one thinks greatly contributes to them being happy or not. People tend to focus on negative aspects of life whenever they feel they have low spirits. This in turn affects their happiness and instead leaves them feeling much worse. The natural environment where one lives and the kind of nurture and experiences in life contributes to the way one thinks and influences the thoughts that one has, which in turn have been observed to influence the happiness that an individual will display.            This clearly indicates that the thoughts that people have play a major role in them being happy or unhappy. Ellen and Judy (1976) conducted a research and they found out that when people are able to control small issues that affect their life, they are in better position to enhance their happiness (Spoors et al, 2007, pp.53-7). From research which was conducted by Richard Layard (2005), it was observed that there are seven major factors which influence happiness in human beings but the main factor that was identified was close relationships. This same idea was supported by Robert Lane (2000, p. 6), who identified close relationships with families and friends to be great factor that increased human happiness (Spoors et al, 2007, pp.83-5). The views presented by the various researchers regarding the causes or the predictors of happiness are quite convincing considering the kind of research that they have presented is in-depth. Human beings do things because of how th ey feel and most of the actions are more influenced by nature and nurture, which in turn determines the happiness that human beings display. Therefore, it can be said that nature and nurture are both important determinants or the predictors of the happiness of human beings because they all have direct influence on the thoughts, the brain activities and the kind of relationships which people have during their lifetime. References Phoenix, A. (2007) ‘Identities and diversities’ in Miell, D., Phoenix, A. and Thomas, K. (eds)  Mapping Psychology, p.  104. Spoors, P., Finlay, L. and Dyer, E. (2007)  Starting with Psychology p.  5; 26-9; 53-7; 83-5 Source document

Saturday, October 26, 2019

Understanding Enterprise And Enterprising Skills Commerce Essay

Understanding Enterprise And Enterprising Skills Commerce Essay Being enterprising means to show initiative and a willingness to undertake new, often risky, projects. It is also about having the mindset and attitude to problem solving. many people think that an enterprising person is someone who runs their own business. However, enterprising people can be foundà ¢Ã¢â€š ¬Ã‚ ¨in all walks of life, for example at your school, in sports and among TV celebrities. Someone who runs his or her own business is just one example of an enterprising person. In this essay, the following would be discussed: what an owner-managed enterprise is and how to define it. Key set of skills and behavior required to be enterprising and the benefits of being enterprising. I would also be sharing on my background and experience where I have been enterprising. Definition of an owner-managed enterprise An owner-managed enterprise is a business run by an individual. It can range from running a simple barber in a neighbourhood vicinity to managing a food store. Such businesses are usually either a family run business or a business that does not require much man power. In my definition, an owner-managed enterprise is one that can be a simple online merchandise seller to a provision store. There is one owner who either works for himself or has a few workers under him. Owner managed enterprises are also usually started by self-aspiring entrepreneurs who like to rise up to the challenge and start a business or entity by themselves. 3.0 Key skills and behaviour required to be enterprising In order to be enterprising, a certain set of skills and knowledge are required. An enterprising individual is always known to be someone whom uses their initiative to identify new opportunities. They also tend to be innovative and are usually determined to achieve. They usually see opportunities in all aspects of life and are marked by imagination, ambition, energy and readiness to undertake new projects. In my opinion, enterprising requires the following qualities: Energy Working hard, but also in a smart way, is key in entrepreneurship. Lots of both mental and physical energy is needed to be able to face all the challenges involved in providing solutions to issues and for the successful completion of projects. To sustain this energy, you need to stimulate your brains and all your senses, so that they all stay alert in identifying what needs to be done in different situations. Need to achieve Have the motivation to achieve success and accomplish all the activities you engage in is essential in being enterprising. A firm attitude and perceptiveness would allow and individual to work towards acceptable results whenever you set out to do something. This approach one to work harder. Task oriented In order to gain satisfying rewards, tasks have to be well executed and completed on time. Efficiency, effectiveness and time management are important aspects that enable an individual to complete tasks. Being able to focus on results helps one to concentrate on whatever they set out to do. Empathy You are able to mentally put yourself in the position of the person or persons you intend to influence. You want to feel what they are feeling. You are able to put yourself in their shoes. In the case of a business enterprise you are able to imagine how a potential customer would feel. Resourcefulness You are able to provide the leadership and guidance needed to realize the enterprise. Identification, mobilization and effective utilization of both the physical and the non-physical resources needed in undertaking a venture are very important in the enterprise process. Planning To be able to see the total picture of the enterprise in terms of why it should be set up, what needs to be done, how it will be done, who will do it and when it will be done, it is necessary to establish a written plan. This will help to clarify the situation and permit decisions to be made as to whether to engage in activities that will result in an enterprise being set up or not. In the case of business ventures, it is through planning that indication on whether there will be profits or losses will be made available. Risk-taking The decision to go ahead and start the enterprise or undertake the activity must be made. All enterprising men and women make this decision only after they have done a certain amount of research, so that in the end they are usually able to achieve the results, succeed and receive the rewards. You will always have to take this first step, as it marks the difference between enterprising and non-enterprising men and women. Success begins with the decision to star moving in the right and desired direction. Innovation The ability to apply new ideas that will enable you to undertake activities differently is another hallmark of enterprising men and women. Through individual initiative, imagination, intuition and insight you will be able to change things around or devise ways of doing things to accommodate whatever new situation you may find yourself in. Information on different issues and fields is an important input for being innovative. Enterprising men and women therefore place great value on information and are always alert and constantly engaging in research. Skills Enterprising men and women have the ability or know-how that enables them to undertake and complete activities. Most men and women have a certain amount of knowledge, attitudes and practical skills that can be useful when realizing an enterprise. You should therefore evaluate the talents and level of skills you have and how they can be harnessed to realize an enterprise. Talents and acquired skills have to be constantly utilized otherwise they can also be forgotten and wasted. Endurance There are many challenges to be faced when trying to set up an enterprise. Women face specific challenges, some of which are negative and discouraging. To ultimately realize the enterprise that will provide you with the rewards you desire, the ability to keep on track despite the many challenges along the way is critical. Patience, persistence and confidence are some of the attitudes you will need to adopt to enable you to endure the physical and mental challenges you may encounter. 4.0 Outline some of the key areas drawing upon your background and experience to demonstrate where you have been enterprising. Enterprising does not define to just be the capability to run a business. Being enterprising is a character skill that can be either is detected through everyday action. For example, as a young kid, I always had the love for sports and at that age, it was basketball. Upon futile attempts at begging my parents for a ball, I realised that there was only one way to get what I wanted and that was on my own. As such, I started saving pocket money and not spend it on recess. This habit has cultivated a resourcefulness instinct in me. From managing to save bits from my recess money over a month and eventually attaining my goal then has led me to think before spending and see its worth. I believe it is enterprising as it given me the knack of identifying if a product is now worth its cost. For instance, when purchasing a pair of shoes, unlike people of my age group who look at two things that being the price and the brand, I look at a few other things. The key things I look out for is if it can last long and if its material and workmanship justify the price. Being resourceful has led me to start some business projects but however due to school and time constraints, I have ended it. For one, I used to work as a events planner. As an events planner, to intrigue customers, I had to be innovative and creative and come up with new ideas from the decorating the event location to the itinerary. This was to be beneficial for me as the more I came up with, the more profits I would make. After confirming their requests, I would find sublets of each individual requirement and comb it up to the one event. Although it did not give me a stable monthly income, it did not require me to have a capital but just required enterprising skills. These experiences have also given me the capacity to have a marketing and sales edge. Prior to school, I was working in an engineering firm as a technician. As sales engineers racked up money for bringing in sales, I wanted to try my go at bringing in sales while being a technician as well. I rang up friends and whomever I knew in the industry and managed to eventually get some contracts and deals. Although I was a technician only and a temp staff at that, I gained self-satisfaction with my capability as I managed to achieve bigger things over time although slowly, but I believe patience is also a vital factor in enterprising. 5.0 What are the benefits of being enterprising for your future employment? As mentioned in section 4.0, enterprising has complemented me in all the types of work I have ventured in. In addition I believe I have the resourcefulness and capability of transforming scrap metal into something of more value like a sculpture. An enterprising person is someone who has an eye for details and keeps his eyes open and mind active. It also requires one to be skilled enough, confident, and creative and most importantly disciplined enough to seize opportunities regardless of how bad the economy may be at the point. Importantly, I believe to be enterprising, it requires one to be resourceful. One is resourceful by using his own initiative to make the best of things. By being resourceful, he automatically learns to be innovative and creative. With these two valuable skills in hand, it automatically leads to achievement. Upon graduation, I would be armed with a degree in mechanical design and manufacturing. In the aspects of manufacturing, one key aspect in this degree would be to be resourceful. Manufacturing requires great production in least time. As such, by being resourceful, the company would be able to be thrifty and gain more profits as even by being able to have an eye for detail and change a minor thing, the company can save much as it would be amplified due to production rates. Having a mechanical engineering degree encompasses one to possess an eye for details. Engineering defines to transform creativity into innovation. Having an idea and being able to visualize it and most importantly explode it and make it a reality is important and by being enterprising, one would have the means to find out ways to make this happen. I believe this attribute would be truly important for my future employer as he would definitely be able to market innovative products. Another important attribute of enterprising a mechanical engineer would require is to find out what you can before action is taken. This defines to be every prepared. Before engaging in a task, one must be prepared by doing all homework and research. Ensure all avenues have been checked so that he is ready. As mentioned above, creativity is important but most importantly one requires courage to let the creativity flow. To see differently, I believe one requires courage. Courage is important in innovation as it gives one the ability to not follow main stream and take a part not taken before. As engineers, to decipher new innovations, courage is vital. Enterprising also defines to be seeing the future in the present. This would define one to find a way to take advantage of situations and not be buried by it. This would eliminate laziness and keep one goal orientated. As engineers, in most companies, there are targets to be met on a yearly basis. By having this attribute, one can reach and if possible over hit this number to ensure maximized profits in an industry. Lastly, being enterprising doesnt just relate to the ability to make money. Being enterprising also means feeling good enough about yourself, having enough self-worth to want to seek advantages and opportunities that will make a difference in your future. This would ideally increase confidence, courage, creativity and self-worth. This defines the enterprising nature. In an engineering company, one must be able to encompass all these attributes to stand out and maximize a degree. Innovation and creativity is the key and enterprise naturally complements an idea. As such, I believe by encompassing these attributes, it would truly benefit my future employer.

Friday, October 25, 2019

The Empress Theodora and Justinian Essay -- World History

The Empress Theodora and Justinian The birth of an eastern circus woman attracted no attention at all in mid-millennium year 500. No one could ever imagine that this baby would grow up to be one of the most remarkable women in history of the World. She was the daughter of the bear keeper, a public performer,wife of Justinian, Empress of the Byzantine Empire and a natural beauty whose name became the one name in the voluminous annals of the Byzantine empire known to almost everyone; Theodora. Once the former show girl settled down to respectable married life, she touched every branch of life in the Empire. She had her finger on everything including military campaigns, architectural developments, and government policy and law reforms. With her intelligence and charm and her indomitable willpower she became the backbone of Justinian by being the partner in power. Her supremacy and authority over Justinian and her role in the empire made her a significant woman in the history and the empress of one of the great civilizati ons of the world. She brought Justinian a stabilizing influence and helped him shaped his policies and became the foreground of every picture of the period. For all the long series of masterful empresses none is as astonishing and stunning as the consort of Justinian. This essay will analyze the dynamic of the marriage between Justinian and Theodora and it will argue the importance of this marriage for the strength of the Byzantine Empire. In both Roman and Byzantine Empire, chariot racing was very popular and there were well developed associations of sports fans. There were four major factions of chariot racing and the color of the uniform represented the favorite racing team. Two major groups in this era were ... ...s from the University of British Columbia and it gives a general sketch of the relationship between Justinian and Theodora .It summaries the general events and gives enough information about main incidents. * Ure, P.N. 1951. Justinian and His Age. Boston: Penguin Books The book gives valuable information about Justinian and his age. It covers Justinian's life, his reforms and every action he took. It gives information about the relationship between Justinian and Theodora and its effects on the Empire. It gives a vivid picture of the Byzantine Empire in Justinian's age. The writer of the book also included the writings of some important scholars such as J.B Bury, Norman Baynes and Gibbon's. However the writer of this book did not live to see it print it is a fact that he wrote a great book full of information, giving the reader detailed sketch of Justinian's Age.

Wednesday, October 23, 2019

Investigating the inverse square law Essay

The intensity of the influence at any given radius, r, is the source strength divided by the area of the sphere. ‘ 1 The inverse square law can also be applied to gravity, electric fields, light and sound. In relation to electric fields, the electric force in Coulomb’s law follows the inverse square law: ‘If gamma rays are a form of electromagnetic radiation and undergo negligible absorption in air, then the intensity, I, should vary inversely as the square of the distance between the source and the detector. 2 Air acts as an almost transparent medium to ? -rays, and the intensity (rate of energy arrival per unit area) of ?-rays emanating from a point source varies inversely as the square of the distance from the source. 3 ?-rays fall into many distinct monoenergetic groups because of their variable energies which emanate from any particular emitter. The least energetic radiation will only pass through very thin foils, whereas the most energetic can penetrate up to several centimetres of lead. 4 As ? -rays tend to produce 10-4 times as many ion-pairs per unit length as ? -particles do, measurements are usually carried out using a Geiger-Mi ller (G-M) tube. 5 G-M tubes are widely used for detecting radiation and ionising particles. The anode is kept at a positive potential and the cathode is earthed. The tube may also have a thin mica end window. 6 When radiation enters the tube, a few electrons and ions are produced in the gas. If the voltage is above the breakdown potential (The minimum reverse voltage to make the diode conduct in reverse)7 of the gas, the number of electrons and ions are greatly multiplied. The electrons are attracted to the anode, and the positive ions move towards the cathode. The current flowing in the high resistance resistor (R) produces a pd which is amplified and passed to a counter which registers the passage of an ionising particle or radiation through the tube. 8 The tube cannot be filled with air as the discharge persists for a short time after the radiation is registered. This is due to electrons being emitted from the cathode by the positive ions which arrive there. Instead, the tube is filled with argon mixed with a halogen vapour which quenches, reduces the intensity, the discharge quickly, ensuring that the registered radiation does not affect the recording of other ionising particles. When the G-M tube is detecting one particle, if another enters the tube it will not be detected. This is known as dead time; the average maximum being approximately 90 microseconds. 9 Because this number is so small, it can justifiably be ignored for this experiment. Background radiation must be taken into account when taking readings from the source. Background radiation primarily comes from cosmic radiation and terrestrial sources. 10 This radiation will affect the count and must be corrected. The level of this radiation varies with location and must be measured before conducting the experiment. N0e-? t so ? = gradient/ N0e-? t Safety Precautions: To ensure the utmost safety before, during and after this experiment, some guidelines should be followed:  Food and drink should not be consumed whilst in the same room as the source Food items should not be stored in the same room as the source. The source should only be handled with long handled source handling tongs, and as little as possible   Hands should be washed thoroughly after contact with the source If in contact with the source for an extended period, it is recommended that a monitoring badge is worn   As the source will radiate in only one direction, it should not be pointed at anyone   The source should be locked away in a lead lined box when not in use   Open wounds should be covered securely. Protective gloves should be warn when handling potentially contaminated items Errors: To reduce the possible errors within the experiment, an optical bench will be used to ensure that the G-M tube and the source are properly aligned throughout, as the source radiates in one direction, the alignment must remain standard. Also, for small distances, specifically the distance d0 which is the distance the source is from the opening of the holder plus the distance of detection from the window in the G-M tube, vernier callipers will be used to hold as much accuracy as possible. Vernier callipers read to fractions of a millimetre, making them much more accurate than other measuring devices. Other distances, such as distance d, can be measured with a metre rule as the distances are larger which decreases the possible error in measuring. There will also be the error of human reaction times from observing the final count and pressing the stopclock. To ensure accuracy, practise using the stop-clock and count switch until reasonably consistent results can be obtained. Preliminary Work: To decide on an appropriate voltage to use, the G-M tube and source set-up should be tested. Place the source approximately 10 cm from the window of the G-M tube and increase the voltage slowly, until the count rate stops changing dramatically. Plot a graph of the count-rate, C, against EHT voltage, V. Record the voltages V1 and V2 between which the rate of counting does not vary too much. If the rate of counting begins to rise after remaining much the same for a range of voltage do not raise the voltage any higher or the tube may suffer damage. 14 The optimum operating voltage will be halfway between the voltage where the plateau begins and the voltage where it ends. To decide on the range of distances used, the source was moved close to the window of the G-M tube and was moved back slowly until the scaler could count adequately (5 cm). This is the smallest distance that will be used. To find the other extreme, the source was moved back until the count rate fell to a low value, but could still provide adequate results (35 cm). From these preliminary results I have decided to time for 10,000 counts at 5 cm from the source, 5000 counts for 10cm from the source, and 1000 for 15 – 30cm. This is because any higher values will take considerably longer to measure. I will take three readings from each, as radioactive decay is a random process and it would be unlikely for more than three readings to be similar. An average will be calculated from the three values and the reading for the background radiation will be subtracted to find the corrected count rate. Equipment: Geiger-Mi ller tube of i sensitive type. Decade scaler with variable EHT supply   Sealed cobalt-60 source – sealed to prevent contact with the source and to prevent isotropic radiation   Long handled source handling tongs – to prevent contact with the source Optical bench with source holder – to ensure constant alignment   Stop-clock, readable to at least two decimal places Vernier callipers – to measure the distance d0 to a higher level of accuracy   Metre rule – to measure the distance d Diagram: Where:   B is the optical bench with source holder, H   G is the Geiger-Mi ller tube   S is the decade scaler with variable EHT supply. R is the sealed radioactive source, cobalt-60 Cobalt-60 will be used as the gamma source as it is easily produced, by exposing natural cobalt to neutrons in a reactor, and therefore easy to acquire. 15 It also produces ? -rays with energies of 1. 17 MeV and 1. 33 MeV. Method: 1. Clamp the G-M tube to one end of the optical bench and attach it to the input socket of the scaler 2. Set the variable EHT voltage on the scaler at a minimum and turn it on, allowing a few minutes for the scaler to warm up 3. Change the variable EHT voltage on the scaler to the value found through preliminary work and set it to count pulses from the G-M tube. 4. Start the stopclock and measure the background radiation for an adequate length of time, e. g. 25 minutes, as background radiation is variable 5. Place the holder containing the ? -source at 5. 0 cm from the window of the G-M tube 6. Start the stopclock and stop after 10,000 counts are registered. Record this value and repeat twice 7. Move the ? -source to 10. 0 cm from the window of the G-M tube and repeat procedure 5, instead only counting 5000 counts 8. Move the ? -source to 15. 0 cm from the window of the G-M tube and repeat procedure 5, instead counting only 1000 counts 9. Repeat procedure 7 for sets of 5. 0 cm until a distance of 30. 0 cm is reached 10. Tabulate these results and find the average count rate for each distance 11. Evaluate 1/(d + do)2 12. Using the recorded value for background radiation, evaluate the corrected count rate for each distance 13. Plot the graph of corrected count rate against 1/(d + do)2 1 http://hyperphysics. phy-astr. gsu. edu/Hbase/forces/isq. html 2 Essential Pre-University Physics’ – Whelan & Hodgson, page 953 3 ‘Essential Principles of Physics’ – Whelan & Hodgson, page 472 4 ‘Essential Principles of Physics’ – Whelan & Hodgson, page 472. 5 ‘Essential Principles of Physics’ – Whelan & Hodgson, page 472 6 http://www. imagesco. com/articles/geiger/03. html 7 http://en. wikipedia. org/wiki/Breakdown_voltage 8 ‘Essential Pre-University Physics’ – Whelan & Hodgson, page 406 9 http://www. imagesco. com/articles/geiger/03. html 10 http://en. wikipedia. org/wiki/Background_radiation 11 ‘Advanced Level Practical Physics’ – M Nelkon & JM Ogborn, page 218 12 ‘A Laboratory Manual of Physics’ – F. Tyler, page 269 13 http://en. wikipedia. org/wiki/Cobalt 14 ‘Advanced Level Practical Physics’ – M Nelkon & JM Ogborn, page 212 15 http://en. wikipedia. org/wiki/Cobalt. Source: http://en.wikipedia. org/wiki/Geiger-M%C3%BCller_tube The anode is a central thin wire which is insulated from the surrounding cathode cylinder, which is metal or graphite coated.

Tuesday, October 22, 2019

Amnesty is Already a Verb

Amnesty is Already a Verb Amnesty is Already a Verb Amnesty is Already a Verb By Maeve Maddox A reader questions a word she heard spoken by a Fox News announcer: [The announcer used] the non-word â€Å"amnetize† to mean â€Å"granting amnesty to.† Just to make sure that it is not a real word, I looked it up as â€Å"amnetize† and â€Å"amnitize.† How can we stop this grammatical ugliness before it spreads? There’s no entry for amnetize in either the Oxford English Dictionary or in Merriam-Webster. I checked the Ngram Viewer as well: no sign of it there. According to OED and M-W, the verb that means â€Å"grant amnesty to† has the same form as the noun: OED amnesty (verb): To give amnesty to, to admit to amnesty; to proclaim the overlooking of the past offences of (rebels). M-W amnesty (transitive verb): to grant amnesty to A Google search for the verb amnetizewith and without quotation marksgarnered only about 300 hits. The two contexts in which I found the verb form amnetize were in discussions of sports contracts and in posts critical of US immigration policy: What is the rush to amnetize Scola? To make room for Howard? That’ll be the subject of a third amnesty in a few years unless the bureaucrats amnetize-as-they-go. There isnt an Illegal Alien he won’t Amnetize!    the obama minions will soon amnetize 40+ million new voters Im sitting down to type an argument that says the Spurs shouldnt and wont amnetize Richard Jefferson this season. One writer questions the validity of the word even while using it; another encloses it in quotation marks to indicate that the word is being used in a nonstandard way: Obama and the democrats want badly to amnetize (is that a word?) all 12-20 million illegals. With the vast majority of ‘amnetized’ illegals voting Democrat, they will take the next presidential election. The kind of amnesty meant in the context of sports refers to â€Å"amnesty clauses† in contracts between players and franchises: The Amnesty Clause is a clause negotiated into the newly ratified Collective Bargaining Agreement between the players and owners which allows a team to release one player from their roster and be free of any financial obligations to that player.  This was added to allow teams to clear salary cap space in preparation for new salary cap rules.   A player who is released under this program is said to be â€Å"amnestied.† Sporting Charts Dictionary Note that this official definition uses the verb form amnestied and not amnetized. Bottom line: The standard verb that goes with the noun amnesty is amnesty, not â€Å"amnetize.† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Misused Words category, check our popular posts, or choose a related post below:Arrive To vs. Arrive AtUsed To vs. Use ToHow Long Should a Synopsis Be?

Monday, October 21, 2019

Achilles - Profile of the Greek Hero of the Trojan War

Achilles - Profile of the Greek Hero of the Trojan War Achilles is the quintessentially heroic subject of Homers great poem of adventure and war, the Iliad. Achilles was the greatest of the warriors famed for his swiftness on the Greek (Achaean) side during the Trojan War, directly competing with Troys warrior hero Hector. Achilles is perhaps most famous for being imperfectly invulnerable, a detail of his exciting and mythical life known as the Achilles Heel that is described elsewhere. Achilles Birth Achilles mother was the nymph Thetis, who had early attracted the wandering eyes of both Zeus and Poseidon. The two gods lost interest after the mischievous Titan Prometheus revealed a prophecy about the future son of Thetis: he was destined to be greater and stronger than his father. Neither Zeus nor Poseidon was willing to risk losing his position in the pantheon, so they turned their attention elsewhere, and Thetis ended up married to a mere mortal. With Zeus and Poseidon no longer in the picture, Thetis married King Peleus, a son of the King of Aegina. Their life together, although short-lived, produced the child Achilles. As was true for the most famous of the ancient heroes of Greek myth and legend, Achilles was raised by the centaur Chiron and taught at a school of heroes by Phoenix. Achilles at Troy As an adult, Achilles became part of the Achaean (Greek) forces during the ten long years of the Trojan War, which, according to legend was fought over the much-courted  Helen of Troy, who had been kidnapped from her Spartan husband Menelaus by Paris, the Prince of Troy. The leader of the Achaeans (Greeks) was Helens (first) brother-in-law Agamemnon, who led the Achaeans to Troy to win her back. Proud and autocratic, Agamemnon antagonized Achilles, causing Achilles to leave the battle. Furthermore, Achilles has been told by his mother that he would have one of two fortunes: he could fight at Troy, die young and achieve everlasting fame, or he could choose to return to Phthia where he would live a long life, but be forgotten. Like any good Greek hero, Achilles first chose fame and glory, but Agamemnons arrogance was too much for him, and he headed home. Getting Achilles Back to Troy Other Greek leaders argued with Agamemnon, saying Achilles was too powerful a warrior to be left out of the battle. Several books of the Iliad are dedicated to the negotiations to get Achilles back into battle. These books describe long conversations among Agamemnon and his diplomatic team including Achilles old teacher Phoenix, and his friends and fellow warriors Odysseus and Ajax, pleading with Achilles to get him to fight. Odysseus offered gifts, news that the war was not going well and that Hector was a danger that only Achilles should kill. Phoenix reminisced about Achilles heroic education, playing on his emotions; and Ajax upbraided Achilles for not supporting his friends and companions in the fray. But Achilles remained adamant: he would not fight for Agamemnon. Patroclus and Hector After he left the conflict at Troy, Achilles urged one of his closest friends Patroclus, to go fight in Troy, offering his armor. Patroclus donned Achilless armorexcept for his ash spear, which only Achilles could wieldand went into battle as a direct substitute (what Nickel refers to as doublet) for Achilles. And at Troy, Patroclus was killed by Hector, the greatest warrior on the Trojan side. Upon word of the death of Patroclus, Achilles finally agreed to fight with the Greeks. As the story goes, an enraged Achilles put on the armor and killed Hectorsignificantly with the ash speardirectly outside of the gates of Troy, and then dishonored Hectors body by dragging it around tied to the back of a chariot for nine consecutive days. It is said that the gods kept Hectors corpse miraculously sound during this nine-day period. Eventually, Hectors father, King Priam of Troy, appealed to the better nature of Achilles and persuaded him to return Hectors corpse to his family in Troy for proper funeral rites. The Death of Achilles The death of Achilles was inflicted by an arrow that was shot directly into his vulnerable heel. That story isnt in the Iliad, but you can read about how Achilles obtained his less-than-perfect heel. Edited and updated by  K. Kris Hirst Sources and Further Information Avery HC. 1998. Achilles Third Father. Hermes 126(4):389-397.Burgess J. 1995. Achilles Heel: The Death of Achilles in Ancient Myth. Classical Antiquity 14(2):217-244.Nickel R. 2002. Euphorbus and the Death of Achilles. Phoenix 56(3/4):215-233.Sale W. 1963. Achilles and Heroic Values. Arion: A Journal of Humanities and the Classics 2(3):86-100.Scodel R. 1989. The Word of Achilles. Classical Philology 84(2):91-99.

Sunday, October 20, 2019

Romanticism in the Early 19th essays

Romanticism in the Early 19th essays The United States was founded on the principles derived from the Enlightenment. Given that romanticism was a reaction against the Age of Reason, why did romantic ideas so capture the minds of Americans in the early nineteenth century? During the mid-1800s, a new wave of lifestyles was taking over in America. Romanticism, which brought about a new style of literature and art, was the new way of life. It came about in many different ways. But most important of the reasons would have to be the literature of the time. All of the sudden, there were many new faces among the countries top authors and writers. With the new faces, they brought their new style of writing. Most of these people were men who set out to foster American genius and to encourage the production of distinctly American literature. (Garraty p.266) Some writers chose to write about American life, like James Fenimore Cooper when he wrote The Pioneers and The Last of the Mohicans, which were about life on the frontier. Edgar Allen Poe, however, was the probably the best fit in this new era, because he caused the readers to use more imagination, paint mental pictures, and think more about what they were reading. He practically invented the detective story with his short story, The Murders in the Rue Morgue. Maybe this was the cause for more women to write stories of their own. Two of the better known female writers at the time were Maria Cummins and Susan Warner. These women wrote, as Garraty puts it, moralistic and sentimental domestic novels. This style of writing became the most popular in the 1850s. However, the men hated it, and put down the female writers. Schooling also had a large part to do with this period. Most of what was happening had to do with reading and writing and the arts. You have to learn to read and understand meanings of things so that you understand whats goin ...

Saturday, October 19, 2019

The Failure of Circuit City Stores Research Paper

The Failure of Circuit City Stores - Research Paper Example The articles will be chosen from business journals or from some databases. Among the chosen journal, one with the most valuable information that reflects organization’s core business values and corporate culture will be selected to conduct the study. Through this report, the outlook of the author of some article will be presented and critical discussion about the same topic will be carried out. Finally the learning outcomes from the study and article will be illustrated. The company chosen to conduct the study is Circuit city Stores Inc. Before getting into any critical discussion about the area of study, a brief over view of the chosen company will be presented in the next section. Circuit City Stores: A Brief Overview Circuit city Stores Inc. was an US based retailer which was founded in the year 1949. The company used to sell branded products in the category of entertainment software, consumer electronics, personal computers, and also large appliances. It was headquartered at Richmond, Virginia, USA. However in the year 2009 the company was closed due to bankruptcy and failure to grab any customer (Wallace, Gifford & Dougias, 2004). During the time of its liquidation, the company was the second biggest consumer electronics retailer just after Best Buy. Throughout its lifespan the company had 567 Circuit City superstores nationwide. Initially 155 stores were closed during the time when it filed bankruptcy in 2008. Finally in the year 2009, lack of consumer demand and economic downturn has forced Circuit City Stores to completely shut down its operation (McCrorey, 2012). The company placed the headquarters for sale in the year 2010 and ultimately it was purchased by a New York-based Lexington Property Trust at a staggering $17 million. After its liquidation Systemax is the present owner of Circuit City Store. Systemax acquired the brand name, e-commerce business and trademark at a public sale or an auction which was held at the Circuit City Stores. Syst emax now uses the brand name of Circuit City as in order to sell consumer electronic online (Circuitcity, 2012). It has now become an online store and operates as circuitcity.com. The new online store sells various electronic products such as computer parts and accessories, camera, surveillance devices, audio, GPS devices, cell phones, software, toys and video games, and home & office essentials among others. Presently the company competes with Target Corporation, Walmart, Boater’s world and Best Buy among others (Plunkett, 2006). Selected Articles The articles which have been shortlisted for the purpose of the study are presented below in a tabular form. Name of the Article Author(s) The rise and fall of Circuit City Amy Hart, Erika Matulich, Kimberly Rubinsak, Kasey Sheffer Nikol Vann and Myriam Vidalon. Circuit City Gearing Up For Holidays Alan Wolf Circuit City to Close 69 Stores Erik Gruenwedel Circuit City Curbs Expansion, may Close Stores ALAN WOLF Why Circuit City Bus ted, While Best Buy Boomed Anita Hamilton Circuit City: A Brief History in Time Alan Wolf Closed Circuit Erik Gruenwedel Liquidation Of Circuit Enters Its Final Phase Alan Wolf All the articles provide some amount of information regarding Circuit City Store and how it gradually went down or rather was forced to put down the lid. According to the requirements, one article has to be chosen for the purpose of this study. Therefore, from the aforementioned journal articles, the one which has been chosen to perform the study is the rise and fall of Circuit City by Amy Hart, Erika Matulich, Kimberly Rubinsak, Kasey Sheffer Nikol Vann and Myriam Vidalon. The primary reason for choosing this article is the clarity of the article. This article clearly describes how the company went bankrupt in 2009 and what the

Friday, October 18, 2019

Global Environmental Impact Essay Example | Topics and Well Written Essays - 1750 words

Global Environmental Impact - Essay Example As the paper discusses an extensive review of the literature found out that series of climatic change agreements and institutions have taken place to reduce Global environmental impact by climate change. Man-made climate change was known to be a problem in the 20th century even though Green House Gases emissions effects on the global climate have been there since 19th century. Intergovernmental Panel on Climate Change was established in 1988 to assess the scientific evidence. According to the research findings COP 15 in Copenhagen was established in 2009 to implement new climate agreement that would commit both developing and developed countries, an agreement that was post-Kyoto period. This conference resulted in a failure since it ended with a non-binding document mentioning 2oC target, a gaol was agreed to provide climate finance, and came up with Green Climate Fund in which countries made pledges up to 2020 that were not sufficient to meet the 2oC target In 2011, COP 17 conference was held in Durban. It establishes a mechanism of technology to expedite technology development and relocation. The conference also concluded that a new agreement to be adopted by 2015 and enter into force in 2020. The agreements was to be legally binding and applicable to all countries of the world and the Ad Hoc working group on Durban platform was to prepare it for an Enhanced Action. The US-China announcement on their intention to reduce climate change was made on December 2014 a head of the Lima conference.

Using examples, critically discuss the importance of gastronomy to at Essay - 2

Using examples, critically discuss the importance of gastronomy to at festivals - Essay Example Food festivals in the UK is a good example of food festivals where gastronomy can be used to benefit the tourism sector while improving culinary experience of many people who attend food festivals in the UK annually. Several regions of the UK offer food festivals in which all kinds of food from those regions are served, ranging from insects, oysters, mocktails and ales. Gastronomy in these food festivals enables locals and tourists to learn various types of food, share ideas about food, and build their nutrition knowledge (Smith & Costello, 2009). This improves relationships between people from different cultures, and enables them to enjoy their experiences together and build unity across UK and the world. This is also supported by Niester (2008), who suggests that food festivals such as beer festivals bring together visitors who come beer testing and experience, leading to strong relationships. People get to know each other as they test beer during beer festivals and beer shows held annually in Yorkshire, UK. Gastronomy also enables people to learn about sensory human nutrition. Visitors attending festivals do not just get the chance to enjoy beautiful sceneries and marvelous performances, but they also get to taste, discover, research and understand about food in a practical and enjoyable manner. For example, the Ludlow food festival in Shropshire is famous for modern food festival trend that involves preparation of sausage and ale trails (Lloyd & Johnson, 2009). The festival organizes an interactive event which allows participants to learn how to use their five senses when eating (Lloyd & Johnson, 2009). This event does not just promote relationships but also enables people to understand their sensory human nutrition. Gastronomy also enables people to learn and understand how food nutrition relates to culture (Katz & Weaver, 2003). As a

The Baroque and Rococo Essay Example | Topics and Well Written Essays - 1000 words

The Baroque and Rococo - Essay Example Rococo style of art emerged in France in the early 18th century as a continuation of the Baroque style. In contrast to the heavier themes and darker colors of the Baroque, the Rococo style was characterized by an opulence, grace, playfulness, and lightness. Rococo motifs focused on the carefree aristocratic life and on lighthearted romance rather than heroic battles or religious figures; they also revolve heavily around nature and exterior settings. Baroque derived from the Italian word barocco, which was a term used by philosophers during the middle Ages to describe an obstacle in schematic logic. Another possible source is the Portuguese word barroco (Spanish barrueco), used to describe an irregular or imperfectly shaped pearl, and this usage still survives in the jeweler's term baroque pearl. Rococo was an art style of 18th-century painting and decorations characterized by lightness, delicacy, and elaborate ornamentation. The Rococo period corresponded roughly to the reign (1715-1 774) of Louis XV of France. The term rococo comes from the French rocaille, "rock-work". Baroque in the 16th century up to the 18th century was considered to be loosely applied to European art. Based on Hauser, the painting of the Baroque period is so varied that no single set of stylistic criteria can be applied to it. The reason for this is that because currents of classicism and naturalism co existed with. According in the History of Art by Hauser, the catholic churches use this kind of art in order to invite the churchgoers. to enter their church. The churches that evolved from this program were both sensuous and spiritual, while the naturalistic rendered the religious image more comprehensible to the average churchgoer, dramatic and illusory effects were used to stimulate piety and devotion. According to Hauser the Baroque vision of the world is dynamic and dramatic. Hauser described the figures with utmost vividness and richness by using rich colours, dramatic effects of light and shade, and lavish use of highlights. Based on the Story of Art in 1950, Gombrich distinguished between representational art based on seeing and that on based on understanding. The story of the Art, is a story of a continuous weaving and changing of tradition in which each work refers to the past and points to the future. The baroque style according to Gombrich in the Story of the Art, should emphasized on unity among the arts. Gombrich description on baroque art is that the viewer tends to engage the viewer, both physically and emotionally. In painting and sculpture this was achieved by means of highly developed naturalistic illusionism, usually heightened by dramatic lighting effects, creating an unequaled sense of theatricality, energy, and movement of forms. Architecture, departing from the classical canon revived during the Renaissance, took on the fluid, plastic aspects of sculpture. Hauser and Gombrich on Rococo The Rococo style of art emerged in France in the early 18th century as a continuation of the Baroque style, but in

Thursday, October 17, 2019

Leadership Profile second stage (Qaide azam Mohmad Ali Jinah) Essay

Leadership Profile second stage (Qaide azam Mohmad Ali Jinah) - Essay Example (Wolpert, 1984, p. 182) Adair, (2002, p. 3) concludes that no communities are identified that do not have leadership in several characteristics of their communal life, though numerous may not have a particular overall leader to make and execute decisions. National practicability depends in some measure on effective leadership. Successful leaders participate in both professional leadership activities (e.g. setting a chore, creating a process for attaining ambitions, lining up methods and routes) and personal leadership activities (e.g. building confidence, gentle for people, acting with integrity). Great suggestions proposed by the right being in the wrong situation, or to the immoral audience, or at the badly chosen time are meant to fail. Great leaders are those who employ and focus the appropriate combination of elements on the dot to impact their world in impressive ways. This idealism, combined with his feeling, dating back to the London days, that there was a role for him on Indias political stage, le d him to join the Indian National Congress in 1906 and, three years later, to make a bid, which proved successful, to enter the Imperial Legislative Council as the nominee of the Muslims of Bombay. At Congresss 1906 session, Jinnah acted as private secretary to the president, Dadabhai Naoroji. It was a landmark session: for the first time Congress asked, through its president, for "Swaraj," using the Hindi word for self-rule. Later, when Bal Gangadhar Tilak of Poona, famed for his assertion, "Swaraj is my birthright and I shall have it," was prosecuted by the Raj, Jinnah served as one of the Brahmin defendants lawyers. Remarkably, the majority of what we know about leadership derives from the observation of how folks relate to their immediate heads. Nonetheless, probing individual opinions of â€Å"leadership† at the national level is a striking intention (Meigs, 2001, p. 4).

Truth, Justice and Reconciliation in Latin America Essay

Truth, Justice and Reconciliation in Latin America - Essay Example How we choose to overcome these political and social obstacles will largely predetermine the success of our democratization endeavors. However, democratization, how difficult and painful it may be, is the only chance for Argentina to become a civilized community. In this situation, there are several possible paths we could choose. My task and the task of the commission are to analyze all possible options and pathways and choose the best for our country. The current role of the commission is to investigate the past human rights violations and develop new democratization strategies, based on the principles of effectiveness, forgiveness, and justice. People of El Salvador should realize that the commission on the truth was created to investigate human rights violations and offenses, the consequences of which the people of Argentina had been suffering for years. These investigations, on the one hand, will promote better efficiency of crime investigation, especially in terms of crimes against humanity. Simultaneously, these investigations will become the first step toward democratization, which will finally give the people of Argentina an opportunity to exercise their rights and freedoms to the fullest. Our Truth Commission was established the end of the twentieth century, following the end of the Dirty War in 1983. The primary aim of the Commission was to find out the fates and destinies of thousands of people, who had disappeared during the War. As a result, â€Å"we have discovered close to 9000 of these unfortunate people who were abandoned by the world† (Report of Conadep). Today, the goal of our organization is to exp lore the reasons of human rights violations in Argentina. The commission will work to identify the legal branches and fields of human performance, in which most human rights violations take place. I cannot but admit that the Truth Commission

Wednesday, October 16, 2019

The Baroque and Rococo Essay Example | Topics and Well Written Essays - 1000 words

The Baroque and Rococo - Essay Example Rococo style of art emerged in France in the early 18th century as a continuation of the Baroque style. In contrast to the heavier themes and darker colors of the Baroque, the Rococo style was characterized by an opulence, grace, playfulness, and lightness. Rococo motifs focused on the carefree aristocratic life and on lighthearted romance rather than heroic battles or religious figures; they also revolve heavily around nature and exterior settings. Baroque derived from the Italian word barocco, which was a term used by philosophers during the middle Ages to describe an obstacle in schematic logic. Another possible source is the Portuguese word barroco (Spanish barrueco), used to describe an irregular or imperfectly shaped pearl, and this usage still survives in the jeweler's term baroque pearl. Rococo was an art style of 18th-century painting and decorations characterized by lightness, delicacy, and elaborate ornamentation. The Rococo period corresponded roughly to the reign (1715-1 774) of Louis XV of France. The term rococo comes from the French rocaille, "rock-work". Baroque in the 16th century up to the 18th century was considered to be loosely applied to European art. Based on Hauser, the painting of the Baroque period is so varied that no single set of stylistic criteria can be applied to it. The reason for this is that because currents of classicism and naturalism co existed with. According in the History of Art by Hauser, the catholic churches use this kind of art in order to invite the churchgoers. to enter their church. The churches that evolved from this program were both sensuous and spiritual, while the naturalistic rendered the religious image more comprehensible to the average churchgoer, dramatic and illusory effects were used to stimulate piety and devotion. According to Hauser the Baroque vision of the world is dynamic and dramatic. Hauser described the figures with utmost vividness and richness by using rich colours, dramatic effects of light and shade, and lavish use of highlights. Based on the Story of Art in 1950, Gombrich distinguished between representational art based on seeing and that on based on understanding. The story of the Art, is a story of a continuous weaving and changing of tradition in which each work refers to the past and points to the future. The baroque style according to Gombrich in the Story of the Art, should emphasized on unity among the arts. Gombrich description on baroque art is that the viewer tends to engage the viewer, both physically and emotionally. In painting and sculpture this was achieved by means of highly developed naturalistic illusionism, usually heightened by dramatic lighting effects, creating an unequaled sense of theatricality, energy, and movement of forms. Architecture, departing from the classical canon revived during the Renaissance, took on the fluid, plastic aspects of sculpture. Hauser and Gombrich on Rococo The Rococo style of art emerged in France in the early 18th century as a continuation of the Baroque style, but in

Tuesday, October 15, 2019

Truth, Justice and Reconciliation in Latin America Essay

Truth, Justice and Reconciliation in Latin America - Essay Example How we choose to overcome these political and social obstacles will largely predetermine the success of our democratization endeavors. However, democratization, how difficult and painful it may be, is the only chance for Argentina to become a civilized community. In this situation, there are several possible paths we could choose. My task and the task of the commission are to analyze all possible options and pathways and choose the best for our country. The current role of the commission is to investigate the past human rights violations and develop new democratization strategies, based on the principles of effectiveness, forgiveness, and justice. People of El Salvador should realize that the commission on the truth was created to investigate human rights violations and offenses, the consequences of which the people of Argentina had been suffering for years. These investigations, on the one hand, will promote better efficiency of crime investigation, especially in terms of crimes against humanity. Simultaneously, these investigations will become the first step toward democratization, which will finally give the people of Argentina an opportunity to exercise their rights and freedoms to the fullest. Our Truth Commission was established the end of the twentieth century, following the end of the Dirty War in 1983. The primary aim of the Commission was to find out the fates and destinies of thousands of people, who had disappeared during the War. As a result, â€Å"we have discovered close to 9000 of these unfortunate people who were abandoned by the world† (Report of Conadep). Today, the goal of our organization is to exp lore the reasons of human rights violations in Argentina. The commission will work to identify the legal branches and fields of human performance, in which most human rights violations take place. I cannot but admit that the Truth Commission

Know the benefits of an online presence Essay Example for Free

Know the benefits of an online presence Essay In this assignment I have to identify and describe five principal benefits that businesses gain by having a simple online presence. Remote locations The internet is a boon to anyone who lives miles away from a main shopping centre because they can simply select the items they want and order them online. This is vastly increases the choice of goods and services available to someone who lives in the highlands and Islands of Scotland for example. Customers with travel difficulties Even people who live in urban areas may not be able to get around as easily as they would wish from mothers with young babies to the elderly. In this case, it is far more convenient to buy online particularly when the whether is bad. Poor transport links In many rural areas bus services are very limited and train services may be non-existent or mainly available during the rush hour. Whilst it may be worthwhile taking a long or tedious journey on a special occasion, most people would prefer to make routine purchases quickly and easily online. Marketing Benefits Marketing benefits relate to those gains a business makes in a relation to knowing more than its customers, being able to target its products, services ad the website itself to meet Their needs. This will also make there company well known to other foreign countries and will be willing to do a transaction knowing of there prestige Compete with competitors The aim here is to prevent competitors getting online edge. This may be improving on the products, or services offered, the speed of delivery, the cost of delivery and/or constantly reviewing the style and design of the website itself to utilize new technological developments. It is quicker and easier to understand and compare competitor activities online than by visiting their stores or obtaining information on their products and services offline. Market research There are several ways in which organizations can obtain information from users of its website methods which you can do this is Through log files and cookies both log files and cookies collect information on site usage and provide valuable marketing information. Users can set their browsers not to accept cookies and not al sites have these. Every site, though, produces log files. These are the data records created by the web server that hosts the site Website activity software provides more detailed analysis of the log files than ISP would provide. Subscribers can find out which search engines drive traffic to the site, which pages are the most popular and particular page, that might be significant. Online Market Research this can range from a small pop-up questionnaire that asks a user to assess their online experience to comprehensive customer survey sent by an e-mail to registered users of the site or to volunteers who have agreed to form an online focus group. Rapidity of response to customer interest A web presence provides the opportunity to respond quickly to customers but not all firms take advantage of this. A website can provide several opportunities for customer contact, such as call me buttons and e-mail messages, but speed of response is vital Research has shown that internet users expect a faster response than customers who enquire by telephone or letter.

Monday, October 14, 2019

L. Pisonis Nut Oil Extraction

L. Pisonis Nut Oil Extraction The search for new crops to provide vegetable oils for use in the industry and also for human consumption is growing increasingly over the past two decades. A rapid search on Web of Science„ ¢ platform present more than 19200 results related to nuts, more than 7600 documents are related to edible oils, and more than 22000 results associated with vegetable oil. Additionally, the published items regarding vegetable oil increased from 282 in 1996, to more than 1930 in 2016 proving the growing interest by the scientific community in such field of study [1]. Several Brazilian seeds/nuts species, especially from the Amazonian area have been studied during the last years and most of them were shown to present bioactive compounds and also potential as functional foods [2]-[7]. Nevertheless, some other species are not well-known or were not summited to any further study to elucidate other characteristics. Lecythis pisonis Camb., a Lecythydaceae tree that grows in Brazil, Colombia, Venezuela and in the Guyanas, commonly known as sapucaia provide nuts particularly similar with that of Brazil nut (Bertholletia excelsa). The delicious edible kernels of sapucaia present a characteristic sweet flavor, being considered more digestible than Brazil nut [8]. In addition to the economic and ecological importance of sapucaia, often used to shade cocoa plantations in Brazilian agroforestry systems [9], the nuts from L. pisonis are a valuable source of macro and micronutrients, essential amino acids, minerals such as P, K, S, Mg, Ca, Mn, Ba, Zn, Fe, Sr, Cu, B, Al, and Cl [3], [10], and also fibers [11]. Furthermore, the sapucaia nuts constitute a relevant source of lipids, about 51-64% [5], [8], [10], [11], in which there is a predominance of the linoleic acid (essential fatty acid). Although sapucaia can be considered a potential crop to provide raw material for the production of vegetable oil, the available papers that studied the nuts have mostly focused on the mineral and fatty acid profile [3], [5], [10], [12], [13], and the latest reports are limited to some agronomic, microbial and pharmacological aspects [9], [14]-[17]. Vegetable oils are widely utilized in many applications such as food, cosmetic, pharmaceutics, and biofuel industries. Consequently, stability tests, rheological essays, phase transitions and other properties of the oils should be well characterized to optimize processing conditions and energy inputs [18], [19]. No reference has been found regarding the total phenolic compounds, antioxidant activity, thermal and rheological characterization of sapucaia nut oil. Therefore, the aim of this work was to study the sapucaia nut oils extracted by Soxhlet and Bligh Dyer means and evaluated for their fatty acid composition, rheological behavior, and thermal properties by using DSC and TG/TGA analysis, total phenolic content, antioxidant properties and oxidative stability by Rancimat in addition to Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). 2.1 Chemicals Other reagents used in the experiments were of analytical grade. The aqueous solutions were prepared using ultrapure water. 2.2 Samples Lecythis pisonis nuts were harvest from a crop area located in the city of Araguanà £, Maranhà £o State, Brazil. The nuts (Fig. 1) were dried in an air-circulating oven (Soc. Fabbe, Brazil) at 40  °C for 24 h. Nutshells were removed manually using a stainless steel knife and then submitted to freeze-drying (Liotop L101, Liobras, Brazil) to remove the residual moisture. Prior to the oil extraction, the nut samples were crushed for 30 s with the aid of a stainless steel knife grinder (MA630/1 Marconi Ltda., Brazil). 2.3 Extraction of nuts oils The oil content of L. pisonis nut samples was extracted by the Bligh Dyer method described in AOCS Ba 3-38 method, and also using n-hexane with Soxhlet apparatus (Vidrolabor ®, Labor Quimi, Brazil) according to American Oil and Chemical Society Official Method (1997). Oils were named LP1 and LP2, respectively. After the oil extraction, solvents were removed at 43  °C under reduced pressure using a rotary evaporator (Model 801, Fisatom Ltda., Brazil). Samples were dried at 45  °C in an air circulating oven (Solab, Brazil) and then flushed with gaseous N2 before storage. The oils were kept in an amber glass and stored at -10  °C until further analysis. 2.4 Analytical determinations 2.4.1 Water content and apparent pH Water content was measured by volumetric Karl Fischer titration using a titration system (V30 Mettler-Toledo, Switzerland) [21]. The determination of the pH was performed according to Pena Muniz et al. (2015), as recommended by the Brazilian National Agency for Sanitary Surveillance without previous dilution of the oil, with the aid of a digital pH meter (Model PG1800 Gehaka) at 25  ± 2  °C. The results represent the mean of three measurements. 2.4.2 Measurement of fatty acid composition Fatty acid composition of fresh L. pisonis oils was investigated according to AOCS Official Method Ce 1a-13 [20] by using a GC-MS system (GC-2010) coupled to a mass spectrometer (GCMS-TQ8030) and automatic injection system by headspace (Shimadzu, Japan). Oil samples solubilized with hexane were methylated as described by AOCS Ce 2-66 and then injected into a capillary HP88 column (60 m ÃÆ'- 0.250 mm i.d., 0.2 ÃŽÂ ¼m film thickness, Agilent Technologies) using helium as carrier gas (0.64 mL/min). Oven temperature was programmed to be 175  °C (isothermal) and the detector was held at 250  °C. An aliquot of 1 ÃŽÂ ¼L of the sample was injected using the split injection mode (1:100). Fatty acid composition was expressed as the percentage of the total peak area of all the fatty acids in the oil sample. 2.4.3 Rheological studies Rheological measurements of oils were performed according to Teixeira et al. (2016), by using a Haake Mars II (Thermo Electron GmbH, Germany) rheometer connected to a thermostatic bath (Haake K15), a thermo-circulator water unit (Haake DC5B3) and a Peltier temperature control (Haake UTM Controller). A sensor cone-plate (C60/2  °Ti L) with a diameter of 60 mm and a cone angle of 2  ° was used. Samples remained in the rheometer for 5 min prior to analysis, and sampling was carried out in duplicate. The following measurements were performed: i) flow curve ( = 0.01-500 s-1, t = 300 s); ii) dynamic stress sweep (à Ã¢â‚¬Å¾ = 0.01-100 Pa, à Ã¢â‚¬ ° = 1 Hz) and subsequent dynamic frequency sweep (à Ã¢â‚¬ ° = 0.1-100 Hz, à Ã¢â‚¬Å¾ = 1.0 Pa); and iii) temperature sweep (T = 10-60  °C, t = 1440 s, 2  °C/min and 60-10  °C, t = 600 s, 5  °C/min; à Ã¢â‚¬ ° = 1 Hz, à Ã¢â‚¬Å¾ = 1.0 Pa). Temperature sweeps were performed at a constant tension of 0.5% in the Linear Viscoelastic Region (LVR). The samples were covered by using a sample hood in order to avoid interference of the ambient temperature. The coefficient of determination (R2) and chi-square (à Ã¢â‚¬ ¡2) were chosen to evaluate the fit of the Ostwald-de Waele (Eq. (1)) and Herschel-Bulkley (Eq. (2)) models to the experimentally obtained flow curves: Ostwald-de Waele (OW) (1) à Ã¢â‚¬Å¾ = + ()nH Herschel-Bulkley (HB) (2) where à Ã¢â‚¬Å¾ is the shear stress (Pa), is the shear rate (s-1), à Ã¢â‚¬Å¾0H is the HB yield stress (Pa), K and KH are the consistency index (Pa ·sn), and n and nH are the flow behavior indexes (dimensionless). The effect of the temperature on apparent viscosity was evaluated according to an Arrhenius type equation (Eq. (3)), using a shear rate of 53.4 s-1. (3) where is the apparent viscosity at a specific shear rate, is the preexponential factor, is the activation energy (J.mol-1), is the gas constant (8.31 J. K-1 . mol-1) and is the absolute temperature (K). 2.4.4 Oxidative Stability Index The oxidative stability index (OSI) was estimated in a Metrohm Rancimat model 743 (Herisau, Switzerland), following the American Oil Chemists Society Official Method Cd 12b-92 [20]. Briefly, increasing water conductivities were continually measured while air (20 L/h) was bubbled into the oil (3  ± 0.1 g) heated to 110  °C and their volatile compounds were collected in water. The time taken to reach the conductivity inflection time was recorded. IP was registered by Rancimat 743 PC Software 1.1. 2.4.5 Infrared spectroscopy Fourier transform infrared spectroscopy (FTIR) analyses were determined by using a Vertex-70 spectrometer (Bruker, USA) with an attenuated total reflectance (ATR) accessory, at 25  °C. The oil samples were placed uniformly in the ATR crystal (1.5 mm active area). The FTIR spectra were recorded in the wavenumber range of 4000 to 600 cmˆ’1 with a spectral resolution of 4 cmˆ’1 [23]. 2.4.6 TG-TGA Thermal decomposition TGA analyses were performed in TGA 4000 equipment (PerkinElmer Inc. Waltham, USA). Oil sample (~10 mg) was placed into the platinum pan and then placed in a furnace. The sample was heated from 30 to 750  °C (10  °C/min) in the air atmosphere (70 mL/min flow rate) or under a nitrogen atmosphere. Data on the weight changes of oil samples were obtained from the Pyris„ ¢ software. TG and derivative thermogravimetric (DTG) curves were further analyzed by using Origin 8.6 software (OriginLab, Massachusetts, USA). The thermal stability was measured from the extrapolated onset temperature of the first step of thermal decomposition from respective TG curves, by using the beginning and the peak temperature of the respective DTG peak, as the temperature limits of the data analysis software of the instrument. 2.4.7 DSC Analysis For DSC analysis, a DSC 8500 (PerkinElmer Inc. Waltham, USA) equipped with Pyris„ ¢ software was used. Nitrogen (99.99% purity, White Martins, Brazil) was the purge gas (20 mL/min). The DSC instrument was previously calibrated with Indium (m.p. 156.6  °C, ΆH = 28.45 J/g). The sample was weighed into an aluminum pan and sealed. An empty hermetically sealed aluminum sample pan was used as the reference. In order to reduce temperature gradients, the sample mass was kept small (~ 9.0 mg). The methodology applied was adapted from Zhang et al. (2013). For cooling and melting curves, the samples were first rapidly heated to 80  °C (30  °C/min) from room temperature and held for 10 min. Then, the samples were cooled to ˆ’80  °C (10  °C /min) and held for 10 min to make them fully crystallized, then heated to 80  °C (5  °C /min). To study the effect of the cooling rate on crystallization, samples were rapidly heated to 80  °C (30  °C/min) from room temperature to erase the crystallization memory, and held for 5 min, then the samples were cooled to ˆ’80  °C at the cooling rates of 2  °C/min, 5  °C/min and 10  °C/min, respectively. The cooling thermogram was recorded. For investigating melting profile of L. pisonis oils under isothermal crystallization, the samples were heated at 80  °C (30  °C/min) for 5 min and then cooled (100  °C/min) to a preset temperature (ˆ’10  °C, 0  °C, 10  °C, 20  °C), and hold at that temperature for 10 min for crystallization, then heated to 80  °C (5  °C/min). The melting thermogram was recorded. Pyris„ ¢ manager software was used to calculate the parameters of crystallization and melting, enthalpies, and the solid fat content (SFC) which was estimated based on the integrated area under the melting curve [25]. To measure the cloud point of the oils, the cooling curves at the rate of 2  °C/min were used. The cloud point was the onset temperature of the initial small exothermic peak on these cooling curves [26]. 2.4.8 Total phenolic compounds Contents of the total phenolic compounds (TPC) were determined using the Folin-Ciocalteu reagent assay in methanolic extracts of vegetable oils [27]using microplates technique [28],with gallic acid as a standard for the calibration curve. The absorbance at 720 nm was measured using a spectrophotometer (Tecan Nanoquant Infinite ® M200, Tecan Trading AG, Switzerland) after reaction with the Folin-Ciocalteu reagent in the alkaline medium stand in the dark for 1 h. Contents of the TPC were expressed in mg of gallic acid equivalents (GAE)/100 g of oil. 2.4.9 Antioxidant essays of the oil extracts The free radical scavenging evaluated by the DPPH assay was determined in triplicate using the method proposed byBrand-Williams et al., (1995). The absorbance at a wavelength of 517 nm was measured using a spectrophotometer (Tecan Nanoquant Infinite ® M200, Tecan Trading AG, Switzerland). ABTS scavenging activity of oil extracts was determined in triplicate using the method described by Re et al., (1999). The absorbance at 734 nm was measured. The total antioxidant potential of the oil extracts was performed using the ferric reducing antioxidant power (FRAP) assay [31]. Measurements were performed using the spectrophotometer at 593 nm. The absorbance of the samples was compared to a standard curve (100-1000  µmol/L) and results expressed in mmoL Trolox equivalent per g of oil [mmol TE/g]. All the essays had minor changes as proposed by Zielinski et al., (2016). The determinations were performed in triplicate. 2.5 Data analysis Origin 8.6 software (OriginLab, Massachusetts, USA) was employed to data treatment and graphs. Statistica 10.0 (Statsoft, Brazil) was used for statistical analysis, including means and standard deviations (SD). The experiments were carried out in triplicate. 3.1 Water content and apparent pH As expected for this type of raw material, sapucaia (Lecythis pisonis) oil (SO) samples presented very low water content, to be specific 0.077  ± 0.006 %, and 0.097  ± 0.006 % for LP1 and LP2, respectively. Regarding the apparent pH of SO, LP1 presented 5.720  ± 0.036 and LP2 showed a pH value of 5.353  ± 0.040. 3.2 Phenolic compounds and antioxidant properties Concerning the content of phenolic compounds in SO, LP1 presented higher TPC content than LP2(Table 1). In this regard, SO present greater TPC content (1.418 mg GAE/100 g, average value) than almond oil (0.95 mg GAE/100 g), however, Brazil nut has twice the content of TPC (3.64 mg GAE/100 g) than sapucaia, and macadamia presents fifteen times more TPC (22.5 mg GAE/100 g) [33]. In general terms, the sample LP1 obtained by a cold extraction process showed better antioxidant characteristics than LP2. Natural antioxidants that might prevent biological systems from reactive oxygen species are generally present in vegetable oils as phenolic compounds, phytosterols, tocopherols (Vitamin E) and carotenoid compounds [34]. The results found by in vitro antioxidant assays present some variations that might be assigned to the different mechanisms in the analysis (Table 1). These assays are grouped in the electron-transfer category and there is some specificity among them. DPPH and ABTS radical cations have the same mechanism and present characteristic color which can be monitored by a spectrophotometer when the oil extract is mixed with a reactant solution and the reduced form of the radical shows a loss of color as a result of the donation of a hydrogen atom. Similarly, in the presence of antioxidants compounds, FRAP is characterized by electron transfer ability, tha t results in the reduction of iron ions [35] 3.3 Fatty acids profile Fourteen different fatty acids (FA) were identified in the studied SO (Table 2). The oils were composed predominantly of unsaturated fatty acids (UFA) (61-73%), in which 39.08-45.66% were monounsaturated (MUFA), and 21.95-27.63% were comprised of polyunsaturated (PUFA), such as linoleic and ÃŽÂ ±-linolenic acids, which have been proved to effectively reduce the risk of cancer, osteoporosis, cardiovascular diseases, and diabetes [36]. Such FA profile is rather common for Brazilian edible nuts [5], [37], which reinforces the idea of consuming more nuts rich in fatty acids beneficial to human health, since the main commercial source of PUFA, such as à Ã¢â‚¬ °-3 and à Ã¢â‚¬ °-6 has been fish and fish fat [36]. Among the MUFAs, oleic was the major FA found in SO, ranging from 35.54-44.28% for LP2, and LP1, respectively. Important to note that oleic acid is the primary à Ã¢â‚¬ °-9 FA in the human diet, and it is the predominant MUFA in many oil nuts, totalizing, for example 38.50% in Brazil nut (Bertholletia excelsa) [22], 65.59% in garampara (Dipteryx lacunifera) [5], 67.62% in tucumà £ (Astrocaryum vulgare Mart.) and 39.04% in cutia nut (Couepia edulis) [37]. Besides, the SO presented 21.65-27.19% of linoleic acid, an essential FA which presence in reasonable amounts is important for human health [38]. SO also contains two important cis-MUFA, the cis-Vaccenic and cis-11-Eicosenoic in amounts higher than 1.0%. With regard to the saturated fatty acids (SFA), it is noticed that they represented 25.01-37.25% of total FA, mainly palmitic (14.70-21.38%) and stearic (9.63-11.09%); likewise, other SFA such as myristic, heptadecanoic, and behenic were identified in smaller amounts. Arachidic acid, which is usually present in peanut oil was also found in SO in small quantities and the result is in agreement with Costa and Jorge (2012) who found about 0.22% C20:0 for L. pisonis oil. A similar pattern occurs for Brazil nut, which shows 0.36% arachidic acid, and 14.26% palmitic acid [22]. A good factor to evaluate the quality and digestibility of a vegetable oil can be obtained by the amount and composition of UFA and SFA. A high amount of linoleic acid in comparison to oleic acid (à Ã¢â‚¬ °-9) represents a better quality of the vegetable oil [5]. In this regard, the relationship between linoleic/oleic acids should be considered. The oils can present diverse values for this relationship depending on the extraction method. According to Table 3, the UFA/SFA ratio, as well as the linoleic/oleic ratio for sapucaia oils are lower to those found by [5] and [10], once their oils showed higher content of linoleic acid (Table 2). When compared to other Brazilian oleaginous nuts such as Brazil nut, garampara [5], and cutia nut [37] the unsaturation relationship values between linoleic and oleic acid were also quite different. 3.4 Oxidative Stability Index The oxidative stability index (OSI) is considered an important step in evaluating oil quality. The OSI was evaluated during Rancimat analysis until the end point of stability for SO samples and was expressed in hours. Experimental results confirmed that Bligh Dyer (13.28  ± 0.22 h), which is a cold extraction process, is a technique that causes less damage to the oil in comparison to Soxhlet (7.18  ± 0.50 h) which provided almost one-half of the OSI. The high oleic acid content in SO tends to protect the oil against thermo-oxidation. Costa and Jorge (2012) found 24.89 h of OSI (evaluation at 100  °C) for L. pisonis oil extracted by cold pressing. At the same Rancimat conditions used in this study, similar results were found for Brazil nut oil (8.24 h), hazelnut (8.88 h) and macadamia (7.38 h) [33]. 3.5 Thermal decomposition Thermogravimetric curve (TG) shows the mass loss, and the derivative thermogravimetric curve (DTG) shows the rate of mass loss of SO during thermal decomposition from 30 to 750  °C by TGA (Fig. 2). The values of mass loss are indicated in Table 4. The TG curves indicated that SO were thermally stable up to 303  °C with a mass loss of ~5%. This can be explained by the loss of moisture and volatile compounds in the oils. The oxidative process in vegetable oils is characterized initially by the oxidation forming secondary products (peroxides). The following phase corresponds to the decomposition of MUFA, mainly oleic acid and the polymerization of the substances remaining from the previous phase [39]. Dynamic and inert atmospheres cause different pattern in the TG/DTG profiles. The decomposition and carbonization processes in the air atmosphere occurred in three phases of the curve starting at around 130  °C, achieving about 53-58% mass loss at 405-440  °C, and ending at a temperature range of 611-625  °C, while for nitrogen atmosphere, the process showed two steps, initiating at ~160  °C, reaching 62-75 % mass loss at 426-435  °C, and finishing at 500  °C. DTG curves (Fig. 2) shows more clearly the steps of thermal decomposition. At the higher above-mentioned temperatures, the mass loss reached 100% (no residue remaining). The high UFA content in SO, mainly oleic and linoleic acid are related to be responsible for the occurrence of oxidative degradation reactions [22]. The high values of Ti (onset temperature) showed that SO have high thermal stability, being that the higher is the Ti of decomposition of the oil, the higher is the thermal stability. The results are similar to that of Brazil nut, which is thermally stable up to 209-220  °C and reaches a maximum mass loss of 97% at 580-602  °C [22], [39]. Differences between the thermal behaviors of SO can be related to the FA compositional differences, and also because of the presence of natural antioxidants which tends to protect the oils against oxidation, thus retarding the degradation [40]. 3.6 Thermal behavior for crystallization and melting 3.6.1 Temperature for crystallization and the influence of scanning rate In order to investigate the melting profile of SO under isothermal crystallization, previous tests were done. In one hand, the melting thermogram (Fig. 3 a, b) revealed that when frozen at -10  °C the oil samples showed endothermic peaks at -6.81  °C (LP1) and at -6.16  °C (LP2), with a enthalpy of 9.28 J/g for LP1 and 7.26 for LP2. On the other hand, it was demonstrated that there was no event afterward 0  °C, revealing that no crystallization occurs after that temperature. Such a feature may confirm the liquid state of the SO at room temperature (25  °C). During cooling, the oils exhibited two transitions. The thermograms showed that the position of the exotherms is dependent on the cooling rate, while the amount of the exotherms is independent on the cooling rate. In addition, increasing the cooling rate causes the crystallization peak temperature to shift to lower temperatures, the peak height and area increase (Fig. 3 c, d). This behavior may correspond to the differential crystallization of higher melting triacylglycerols (TAGs) firstly and lower melting TAGs secondly. Similar results are described for palm oil fractions [24]. The scanning rate of 2  °C/min reduces the lag in output response from the DSC instrument as well as preserves the minor peaks and reduces the smoothing tendencies, which occurred at a higher scanning rate; however, the first peak is too small when compared to the rate of 5  °C/min, which provided better resolution for the peak analysis in the Pyris„ ¢ software. 3.6.2 Cooling curve During cooling (Fig. 4a), SO presented a similar pattern of crystallization showing two distinct peaks (exothermic) in the crystallization behavior, namely peak 1 (PC1) and peak 2 (PC2). PC1 which indicates the change from liquid to solid was found in the temperature of -11.56 (LP1) and -12.51 (LP2), while the PC2 was observed in the temperature range of -59.80 to -73.93  °C, both related to the crystallization of TAGs. The crystallization onset temperature occurs at around -8.0  °C and this process extends over a range of 15-23  °C. The sum of the crystallization enthalpy of the two peaks for the two oils were -22.17 and -32.56 J/g for LP1 and LP2, respectively (Table 5). Heat is released during the phase transition of oil from liquid form to solid form; for this reason, values for crystallization enthalpy were negative [41]. Different endothermic and exothermic peaks are exhibited according to different contents of saturated or unsaturated TAG and FA present in the oils [42]. Smaller or shoulder peak are also correlated to the differing type of TAG. In addition, an inseparable shoulder peak which melts at the same temperature range comes from the complex nature of the TAG [43]. 3.6.3 Heating curve During melting, SO were found to be completely melted at 8.28  °C and 6.29  °C (LP1 and LP2, respectively) when heated at 5  °C/min (Fig. 4b). Moreover, LP1 showed a single major shoulder before the maximum melting peaks (PM) at -18.42  °C, while LP2 showed a major shoulder before PM (-21.47  °C) and an additional one, after the major peak at -6.61  °C. The melting curve of SO began at -25.77  °C (LP1), and -29.87  °C (LP2) and the major peak was observed in a temperature region varying between -7.99 to -10.13  °C, ending the events around -1.09 to -1.68  °C. The process comprises a melting range of 24-28  °C, with a melting enthalpy of 59.34 (LP1) and 64.76J/g (LP2) (Table 5). During heating treatment of oil, multiple endothermic regions are correlated to the separate melting events of the TAG. Furthermore, the composition and polymorphism of the oils can cause some overlapping effects, resulting in different shapes of the endothermic peaks [18]. The phase transitions are principally determined by the degree of heterogeneity in the composition of the oils, and include breaking/formation of hydrogen bonds, being a result of structural rearrangements in the chains of glycerides. [44]. 3.6.4 Cloud point The cloud point is referred as the temperature at which oil begins to cloud as a result as a result of the first stage of crystallization under controlled cooling, and it is related to the oils degree of unsaturation. The higher is the unsaturation of the oil, the lower the cloud point [26]. The cooling curves of sapucaia oils showed an initial small exothermic peak at -6.87  °C (LP1) and -7.00  °C (LP2). This peak corresponded to the first stage of crystallization and cloud point corresponded to the onset of crystallization. A second large exothermic peak at ˆ’49.95  °C (LP1) and -49.96  °C (LP2) with further cooling indicated the oil underwent an additional crystallization step. The same behavior was found for hazelnut oils, which presented the first small exothermic peak at -12.4  °C and a large one at -31.5  °C [26]. The lower cloud point of sapucaia oils was also a result of the lower content of SFA compared to the UFA. 3.6.5 Solid Fat Content The solid fat content (SFC) is considered an important physical property of lipids because it expresses their physical, sensorial, technological and protecting/release properties, and it affects physical properties such as consistency, spreadability, and stability [45]. According to the melting thermograms (Fig. 4b), SO presented no changes in SFC previously to -40  °C, so then the data analysis was performed in the range of -40 to 20  °C (melting peak region). The SFC showed less than 2.5% decrease between -40 to -30  °C for the two oils, and started to drop rapidly at around -20 up to 0  °C; then slowed down from 6 to 10  °C until there was no solid fat remaining (Fig. 5). The SFC is associated with the FA profile. Oils with higher content of UFA are easier to melt compared to ones with higher SFA [41], [45]. 3.7 Rheology properties 3.7.1 Steady state rheology The results for rheological behavior of SO shows that the apparent viscosity (ÃŽÂ ·) tends to decrease with increasing temperature (T) and also with increasing the shear rate (ÃŽÂ ³), indicating that the flow of the sapucaia oils is pseudoplastic (n > 1) (Table 6, 7 and Fig. 6). On the one hand, it is usual for oils to exhibit a dependency of T; on the other hand, a non-dependency of higher ÃŽÂ ³ is observed. At 50  °C, the ÃŽÂ · is almost constant throughout the entire range tested, with minimum influence of the ÃŽÂ ³. Furthermore, 2.0 s-1wasthe maximum value of ÃŽÂ ³ which induced major changes in ÃŽÂ · (see detail in Fig. 6, b and c). According to Gila et al. (2015), a greater amount of FAs such as C18:1 and C18:2 as the major components of the oils appear to make a great contribution to the flow behavior of oils. The experimental data fitted by Ostwald-de Waele (OW) and Herschel-Bulkley (HB) models (Fig. 6a, Table 6) showed a good fit (R2 > 0.999; à Ã¢â‚¬ ¡2 KH values decrease (Fig. 6e and Table 6). Similar observation for many edible oils such as coconut, sunflower, canola, corn [47] and olive oils [48] was reported. The OW model showed that the oils were non-Newtonian (n nH > 1) at 30 and 40  °C (Fig. 6f). The HB model is able to determine yield stress (à Ã¢â‚¬Å¾0H), at which a material begins to deform plastically without returning to its original shape when the applied stress is removed. SO have small values for à Ã¢â‚¬Å¾0H which also tends to decrease with the increase of T. Fig. 7 shows the non

Sunday, October 13, 2019

Genghis Khan :: essays research papers

From the high, windswept Gobi came one of history's most famous warriors. He was a Mongolian nomad known as Genghis Khan. With his fierce, hard-riding nomad horde, he conquered a huge empire that stretched through Asia from the Yellow Sea to the Black Sea. Genghis Khan was born on the Gobi, in a yurt, or felt tent, on a bank of the Onon River in northern Mongolia. His father, Yesukai, was the chief of several desert tribes and had just slain a foe named Temujin. In triumph Yesukai named his newborn son Temujin. Yesukai died when Temujin was about 13 years old. The boy succeeded him, but the fierce, restless nomads would not obey so young a chieftain. The chief of another tribe proclaimed himself leader of the Mongols and captured Temujin. Guards forced Temujin into a kang, a wooden yoke that shackled his shoulders and wrists. In the dark he slowly twisted himself to reach above a guard and smashed the kang down on his head. Then Temujin ra Temujin's bold courage and resourcefulness began to win followers. When he reached manhood, he conquered the Tatars and added them to his tribes. In 1203 he defeated the Keraits. Seizing their cities of mud and stone, he made Karakorum his capital. In 1206 a council of his tribes named him Genghis Khan. It means "greatest of rulers, emperor of all men." Genghis Khan then put all his Mongolian realm under Yassa, a body of laws he assembled from various tribal codes. These laws demanded obedience to Genghis Khan, unity of the tribes, and pitiless punishment of wrongdoers. Through Yassa, Genghis Khan achieved the discipline that welded his wild tribesmen into merciless, successful armies. On his march of conquest Genghis Khan overran North China from 1208 to 1215.

Saturday, October 12, 2019

Ukraine: Facts :: essays research papers

Ukraine: Facts Ukraine is a state in Eastern Europe, bounded on the north by Belarus, on the north and east by the Russian Federation, on the west by Poland, Slovakia, on the southwest by Hungary, Rumania, and Moldova, and on the south by the Black Sea and the Sea of Azov. Ukraine includes the Crimean Autonomous Republic, which was elevated from an oblast to a constituent republic in 1991. Kyiv is the capital and largest city. Ukraine is the second largest country in Europe after Russia. The total area of Ukraine is 603,700 sq. km (compare the area of France - 551,000 sq. km; Germany - 356,000; Great Britain - 244,000; Italy - 301,000; Spain - 505,000). The area spanned in a west-east direction is 1300 km; from north to south - 900 km. The population of Ukraine is 52 million (Germany - 78 million; France - 56 million; Great Britain - 58 million; Italy - 59 million; Spain - 40 million). Ukraine's state border extends for a total of 7698 km: with Russia - 2484 km; Belarus - 952 km; Rumania - 608 km; Poland - 542 km; Slovakia - 98 km; Hungary - 135 km; Moldova - 1194 km. The total length of Ukraine's sea coast is 1758 km (Black Sea - 1533 km; Sea of Azov - 225 km). The climate of Ukraine is moderate-continental; in the southernmost region of the Crimea the climate is sub-tropical. The largest river of Ukraine is the Dnipro, which is 2201 km in length, of which 981 km flow through Ukraine. The largest mountain system in Ukraine is the Carpathian Mountains that extend for more than 270 km and are 100-110 km wide. The highest peak is the Hoverla (2061 m). Government Names: conventional long form: none conventional short form: Ukraine local long form: none local short form: Ukrayina former: Ukrainian Soviet Socialist Republic Digraph: UP Type: republic Capital: Kiev (Kyyiv) Administrative divisions: 24 oblasti (singular - oblast'), 1 autonomous republic* (avtomnaya respublika), and 2 municipalites (mista, singular - misto) with oblast status**; Cherkas'ka (Cherkasy), Chernihivs'ka (Chernihiv), Chernivets'ka (Chernivtsi), Dnipropetrovs'ka (Dnipropetrovs'k), Donets'ka (Donets'k), Ivano-Frankivs'ka (Ivano-Frankivs'k), Kharkivs'ka (Kharkiv), Khersons'ka (Kherson), Khmel'nyts'ka (Khmel'nyts'kyy), Kirovohrads'ka (Kirovohrad), Kyyiv**, Kyyivs'ka (Kiev), Luhans'ka (Luhans'k), L'vivs'ka (L'viv), Mykolayivs'ka (Mykolayiv), Odes'ka (Odesa), Poltavs'ka (Poltava), Respublika Krym* (Simferopol'), Rivnens'ka (Rivne), Sevastopol'**, Sums'ka (Sevastopol'), Ternopil's'ka (Ternopil'), Vinnyts'ka (Vinnytsya), Volyns'ka (Luts'k), Zakarpats'ka (Uzhhorod), Zaporiz'ka (Zaporizhzhya), Zhytomyrs'ka (Zhytomyr) note: names in parentheses are administrative centers when name differs from oblast' name Independence: 1 December 1991 (from Soviet Union) National holiday: Independence Day, 24 August (1991) Constitution: using 1978 pre-independence constitution; new constitution currently being drafted Legal system: based on civil law system; no judicial review of legislative acts Suffrage: 18 years of age; universal