OBJECT Essays - Food And Drink, Chemistry, Fruit Juice, Biochemistry

OBJECT Essays - Food And Drink, Chemistry, Fruit Juice, Biochemistry OBJECT Inhibition of Polyphenol Oxidase activity in Apple by using some natural and synthetic anti browning agents . REQUIREMENTS Acidic fruit juices (pineapple, orange, lime, lemon ) 1% Salt solution 1% HCL solution 1% NAOH solution Tap water Apple slice s THEORY E nzymatic browning is one of the most important reactions that occur in fruits and vegetables, usually resulting in negative effects on color, taste, flavor, and nutritional value. The reaction is a consequence of phenolic compounds' oxidation by polyphenol oxidase (PPO), which triggers the generation of dark pigments. This is particularly relevant for apples, which are rich in polyphenols and highly su sceptible to enzymatic browning. In plant cells, phenolic compounds are located in the vacuoles, whereas polyphenol oxidase ( PPO) is located in plastids. Damaged areas in cells allow the contact between PPO and phenolic compounds, triggering the reaction known as enzymatic browning. Examples of beneficial enzymatic browning: Developing color and flavor in Coffee, Cocoa beans, and tea. Developing color and flavor in dried fruit such as figs and raisins. Examples of non-beneficial enzymatic browning: A non-desirable enzymatic browning reaction is involved in the formation of brown spots on the peel of bananas ,avocados,apples and potatoes Polyphenols - main components in enzymatic browning Polyphenols , also called phenolic compounds, are group of chemical substances present in plants (fruits, vegetables) which play an important role during enzymatic browning, because they are substrates for the browning-enzymes. Phenolic compoun ds are responsible for the colo r of many plants, such as apples, they are part of the taste and flavo r of beverages (apple juice, tea), and are important anti-oxidants in plants. Polyphenols are normally complex organic substances, which contain more than one phenol group (carbolic acid): Polyphenol oxidase (PPO ) Polyphenoloxidases are a class of enzymes that were first discovered in mushrooms and are widely distributed in nature. They appear to reside in the plastids and chloroplasts of plants, although freely existing in the cytoplasm of senesci ng or ripening plants. Polypheno loxidase is thought to play an important role in the resistance of plants to microbial and viral infections and to adverse climatic conditions. Polyphenoloxidase also occurs in animals and is thought to increase disease resistance in insects and crustaceans. In the presence of oxygen from air, the enzyme catalyzes the first steps in thebiochemicalconversion of phenolics to produce quinones, which undergo further polymerization to yield dark, insoluble polymers referred to as melanins . These melanin form barriers and have antimicrobial properties which prevent the spread of infection or bruis ing in plant tissues. Example of a general reaction of polyphenols by Polyphenol Oxidases that catalyzes enzymatic browning. The production of Quinones undergoes more reactions which eventually form brown pigments on the surface of fruits and vegetable. PREVENTION OF ENZYMATIC BROWNING The control of the enzymatic browning is of great importance to the horticulture industry, because this reaction occurs in many fruits and vegetables, often negatively affecting the attributes of color, taste, flavor, and nutritional value. It is estimated that more than 50% of fruit market losses ar e a result of enzymatic browning . Researchers are especially interested in studying the control (inhibition) of browning by different methods that can be employed to maximize this inhibition and ultimately pr olong the shelf l ife of commodity.Several methods can be applied to avoid enzymatic browning, based on inactivating the enzyme (heat) or by removing essential components (m ost often oxygen) from the product Blanching is a short heat treatment to destroy or inactivate enzymes before freezing of prod ucts (mainly vegetables). The enzyme activity is pH dependent. Lowering of the pH to 4.0 by the addition of citric,ascorbicor otheracidsinhibits the enzyme activity. Addition of chemical inhibitors like acidulants ,chelating agents, reducing agents may also directly react with enzyme and substrate or change the product composition . METHOD Cut one apple into small thin slices in such way that its pulp portion is exposed to our reagent . Separately place an apple slice in petri dishes and labeled them . With natural anti browning agent, in four samples out of all, squeeze some suitable amount of fresh fruit juices on apple slice. With the synthetic browning agent, firstly prepare solutions

Countries That Lie on the Earths Equator

Countries That Lie on the Earths Equator Although the equator stretches  24,901 miles  (40,075 kilometers) around the world, it travels  through the territory of just 13 countries- and yet the landmasses of two of these countries do not touch the Earths  equator. Did You Know? The equator is an imaginary line that circles the Earth, splitting it into northern and southern hemispheres. Any location that lies along the equator is equidistant from the North and South Poles. The 13 Countries That Lie on the Equator Of the 13 countries that lie on the equator, seven are in Africa- the most of any continent- while South America is home to three of the nations (Ecuador, Colombia, and Brazil). The remaining three (Maldives, Kiribati, and Indonesia) are island nations in the Indian and Pacific oceans.   The countries of Sao Tome and Principe, Gabon, Republic of the Congo, the Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia, Kiribati, Ecuador, Colombia, and Brazil all lie along the equator. The landmasses of Maldives and Kiribati, however, do not touch the equator itself. Instead, the equator passes through water controlled by these two island countries. Latitude and Longitude The equator is one of five lines of latitude that help provide relative locations on an atlas. The other four include  the Arctic Circle, the Antarctic  Circle, the Tropic of Cancer, and the Tropic of Capricorn.  Because the Earth bulges at the center, the equator is significantly longer than any of the other lines of latitude. Along with the lines of longitude which run from pole to pole, they make it possible for cartographers and navigators to locate any spot on the globe. The plane of the equator passes through the sun at the March and September equinoxes. The sun appears to travel directly north to south over the equator at these times. Because of this, people living along the equator experience the quickest sunrises and sunsets as the sun travels perpendicular to the equator most of the year, with the length of days being almost entirely the same throughout- daylight lasting 14 minutes longer than nighttime. Climate and Temperatures Most countries that lie along the equator experience much warmer temperatures year-round than other areas of the world that share the same elevation. Thats because of the equators near-constant exposure to the same levels of sun exposure regardless of the time of year. As a result, the countries that lie along the equators include almost half of the worlds rainforest; they are concentrated in the African nations of Congo, Brazil, and Indonesia. Even so, the equator offers a surprisingly diverse climate due to the geographical features of countries that lie along it. There is little fluctuation in temperature throughout the year, though there may be dramatic differences in rainfall and humidity, which are determined by wind currents. In fact, the terms summer, fall, winter, and spring dont really apply to regions along the equator. Instead, people who live in the especially humid tropic regions refer to only two seasons: wet and dry. Equator Extremes Its reasonable and largely accurate to assume that the weather is uniformly warm or hot around the equator. But of course, weather and climate relate not only to latitude but also to geography. Some countries that lie on the equator are flat and warm but others, like Ecuador, include high mountains where the weather is extremely cold. In fact, you will find snow and ice year-round on  Cayambe, a volcano in Ecuador that reaches to 5,790 meters (nearly 19,000 feet). It is the only place on the equator where snow lies on the ground year-round.

Work control and conflict in formal organizations Essay

Work control and conflict in formal organizations - Essay Example Using Edwards’ definition of labor markets, Company A is an Independent Primary Market (p.418). Employment is stable and job security high because there is never a lack of criminal offenders. There are possibilities of being promoted to a higher rank, or transferring to one of many other positions within the jail. Specific physical and educational requirements must be met and the pay is competitive. In 2004 Company A won a battle to decertify the existing Teamsters Union and form its own Guild in an attempt to secure a better bargaining position with the county. The conflicts at Company A are many and diverse. The line officers and administrative staff (the decision makers) have different views on inmate and officer safety concerns, work hours and conditions and types of initiatives the officers are permitted to take regarding inmate discipline or operating procedures. Teams of personnel who work well together are being assigned separate posts, and there is no longer the feeling of camaraderie that was the norm a few years ago. On a daily basis, the work environment at Company A exemplifies several of Dalton’s descriptions of conflict (p. 153). The new administration, in its attempt to exert control and in an honest effort to improve efficiency, holds many meetings to develop new policies, techniques, and work standards. Whether to return to prior norms or to antagonize management, line officers frequently and deliberately create situations so that these new ideas will fail. The main reason for this worker behavior is that, with few exceptions, management style at Company A tends toward the Initiating Structure Leadership style (Pool, p. 272) and technical control (Edwards, p. 415). The result is micro management. Leaders utilizing the Initiating Structure Leadership style as defined by Pool organize and define the relationships of the group and dictate how the work is to be

Is sickle cell pain adequately managed in a hospital setting Essay

Is sickle cell pain adequately managed in a hospital setting - Essay Example The latter is a synthesis of researches from the main contributors on the same study. The two medical research articles to be presented in this critique will be analyzed in six (6) parts. (1) First is on the statement of the research problem. For the research problem, this section will find out if the problems stated or implied in the two research articles are clear, researchable, and related to field-nursing. The first part will also examine the competence and qualifications of the researchers who conducted the research. (2) The second part is concerned about the literature review. In this section, the relevance, comprehensiveness, currency, and logic of the literature reviews will be evaluated. (3) The third part of this critique studies on the study design. It consists of the study design, discussion of the theoretical framework and the statements of the hypothesis. (4) The fourth is about the data collection. It identifies the data collection methods used in the research articles including the justifications of the usage of these methods. This part also talks abo ut the validity and reliability of the data collection methods. (5) Next part tackles the data analyses of the two articles. This section analyses the appropriateness and descriptiveness of the analysis methods on the data. The analysis methods involve the presentation of findings in the form of tables, graphs, and charts and also some discussions. (6) The last part discusses the conclusions and recommendations presented in the two researches for future studies. This section tends to evaluate if the conclusions presented justify their purposes. In Thomas, Wilson-Barnett, and Goodhart’s research article, they state the problem concerning the difficulty of the management of pain on patients with sickle cell disease. They state the problem by saying the current state in the pain management of sickle cell disease in hospitals. As quoted in their article: â€Å"Painful crisis

The Hypocrisy of Religion in Moby Dick Essay -- Moby Dick Essays

The Hypocrisy of Religion in Moby Dick Stubb decides to give Old Fleece a lecture on religion after waking him to complain about his overcooked whale steak. Not only does Stubb ask Fleece to "preach" to the sharks who are making a considerable din eating the dead whale chained to the ship, but he compares Fleece's inability to "correctly" cook a whale steak to Fleece's un-Christian ways. This passage is an excellent example of the theme of the hypocrisy of religion in Moby Dick. Before Stubb calls on Fleece, Ishmael compares the actions of the shark to the actions of man. He first compares Stubb to the sharks: "Nor was Stubb the only banqueter on whale's flesh that night. Mingling their mumblings with his own mastications, thousands on thousands of sharks, swarming round the dead leviathan, smackingly feasted on its fatness" (Melville ___). By comparing Stubb to a shark, Ishmael portrays him as beastly and uncivilized, two traits that contradict the Christianity he professes and ministers to Fleece. Two more references are made to solidify the comparison; Ishmael describes the "smacking" of Stubb's "epicurean lips," and Stubb himself says he prefers his whale steak the way the sharks prefer it. Next, Ishmael alludes to the bond between sharks and man in general. "The few sleepers below in their bunks were often startled by the sharp slapping of their tails against the hull, within a few inches of the sleepers' hearts" (___). This line poses contradiction; how can the tails of the sharks be within inches of the crew's hearts in the tails are slapping the hull of the ship, for the hull of a whaleboat would be much wider than a few inches. What Ishmael means when he says "within a few inches of the sleepers' hearts" is... ...es of Stubb, he is being ordered to perform a number of tasks, including bowing to Stubb. Religion is nothing more than a hierarchy, where those in power are able to use others in the name of religion. Fleece never shows any sign of relief or enjoyment at being a Christian now; in fact, he seems to have gone through the conversion just so Stubb would let him go to bed. As Fleece walks away from Stubb, he mutters to himself, "Wish, by gor! whale eat him, 'stead of him eat whale. I'm bressed if he ain't more of shark dan Massa Shark hisself" (___). This is the culmination of the scene, where Fleece spells out that sharks, savage beasts without religion, and Stubb, a cultured Christian, are quite similar. This makes Stubb a hypocrite, and his Christian belief system questionable. Works Cited Mellville, Herman. Moby Dick. Indianapolis: Bobbs-Merrill, 1964.

One Nation Under Corn?

A position paper done in fall of 2012 on the cause and affect of the industrialized corn crop. I decided on this subject after my own battle with illness. This battle, ended up changing my diet, and my life as it turns out. I have almost completely removed any corn derived product from my life (all-be-it difficult sometimes) and am a proponent of a purely organic vegetarian diet. One Nation Under Corn? Chad Cribb DeVry University One Nation Under Corn One of the many freedoms we enjoy in this great country is the freedom to choose what you will eat and when you will eat it.Pull up to your favorite fast food burger restaurant, and little thought goes into the entire process. From the drive there, to the ordering of your food, and the packaging they are contained in. When we think more about it, as Michael Pollan did in his book, â€Å"The Omnivore’s Dilemma†, there is a whole lot more going on. Pollan dives deep into the heart of our nation’s fascination with the corn crop and its many uses. Corn started out as a crop grown to feed its people. But in this day and age, very little is actually eaten. Corn has become a giant in the food industry, at a low price; thanks in part to the government help.We started this nation as one based in principle and in the pursuit of freedom†¦. and now it seems†¦ corn. But who is the real beneficiary of this corn crop? And just as important†¦who are the losers? Corn has been around since recorded history and has played a major role in trade and many complex social societies. Corn’s spread across the globe began after contact between the European colonial powers and indigenous peoples of North and South America. It continued on to Africa during the slave trades and was used to actually pay for them. What’s more, it was a source of power for the African middlemen involved in the slave trade.Fast forward now to the 1940’s and 1950’s as corn and corn based foods became c rucial in the agriculture market to sustain military troops during the war. It was after the war that America saw a huge surplus in corn yield partly due to the new hybrid seeds and fertilizers that had recently been manufactured. This surplus had a dramatic effect on the market and the market prices. It was these prices, over the years that caused unpredictable price swings (Wise 2005-9). As our population has increasingly grown thru the years, our need for more food has increased along with it.The polarity between the two was unbalanced and by using the free market approach, farmers regularly had booms and busts in the market. Making farmers the target of continued and increasing depressed prices in their crop. The government soon stepped in with â€Å"The New Deal†, in order to bring supply into line with demand, an approach known as â€Å"supply management† using conservation set-asides, a price floor guaranteeing a fair price (like having a minimum wage), and a gr ain reserve to deal with overproduction. What was not widely known, it appears, is the corporate-world began lobbying for a free market approach again.Beginning in the 1970’s, they used the World Food Crisis and the Russian Wheat Deal to validate their argument to government. Coupling that with the notion of â€Å"getting government out of agriculture†. The result of that was that prices collapsed by the late 1990’s and the government had to bail out farmers with millions in emergency subsidy payments. Prices completely collapsed shortly after the 1996 Freedom to Farm Act, causing expensive taxpayer bailouts. By 2000, subsidies provided 49% of farmers’ net income. This has helped the corn industry to comprise 95% of all food grain produced in America (USDA 2010).The government’s well-intended approach to help â€Å"prop up† the industry, in fact, created a market dependent on the very subsidies that were created to help it. Between 1995 and 2006, the government paid out $56 billion in corn subsidies (Wise 2005-12). What’s more, it helps create a market monopoly. With only 3 companies controlling 90% of the corn market, 2 companies controlling the corn seed market, and 4 companies controlling the high fructose corn syrup industry, the answer should be clear. But as Pollan points out, â€Å"It’s not about who is profiting, but rather who is suffering† (Pollan 2006).Most of what we see in the news is the emphasis placed in the trials and tribulations of the farmer, for the benefit of the consumer. But is it really the consumer who benefits? If the price of food per calorie is the magic calculation, then the answer is yes. But if the average weight per person is, then the answer is no. As the corn industry exploded and the number of companies shrank, corn began a new transformation into other parts of the food industry and more. This came in the form of high fructose corn syrup (HFCS), gasoline additiv es, plastics, and cattle feed to name a few.Cattle feed now encompasses over 50% of the industrialized corn produced in America (Wise 2005-11). The increase of this has helped create the perpetual cycle that has infested the industry, and moreover, the agricultural policy that affects it. The overproduction of corn has led to an overconsumption of corn; mostly in an indirect way. America’s agriculture and international trade policies have created an environment that breeds monopolies and corruption. Big business lobbyist has taken hold in an industry that believes in the â€Å"bottom line†.This philosophy has squeezed out the once popular sugar cane, and ushered in the cheaper, easily produced, HFCS for its products. Because the government has placed so many incentives on the production of corn, other more healthy crops have been left behind. Crops like fruits, vegetables, and whole grains have quickly become a thing of the past. The relationship between government and business has become as unhealthy as the population consuming the products they produce. At one point, it almost looks like the industry wanted the market to crash and the government to step in.One would ask why anyone would want that. Because subsidizing the industrial crop ensures it stays at a cheap price for one. Secondly, the corporations who buy corn to turn into high fructose corn syrup (used in almost every food product) or as feed for livestock, or ethanol for vehicles operations have profited by the billions. Thirdly, the corporate consolidation of our food system as whole. When you think about it, it reaches thru banks, seeds, fertilizers, grain traders, food processors, manufacturing plant, to retailing. Walsh says, â€Å"This kind f uncompetitive market squeezes the farmer on both sides† (Walsh-2009). This notion seems to place a lot of blame on the subsidies themselves. My contention is that subsidies are not the problem with our food system, but merely a produc t of a broken system. To fix the farm policy, legislators must first have a clear understanding of who wins and who loses under the current system and why. Also, the high tariffs placed on sugar cane need to be downsized to allow for balance in the market. But this is a prime example of how the government’s intention to help has unintentional consequences.I believe that the root of our problem today is the â€Å"clinging† to a free market food system. One that allows commodities like corn to be priced so low that would allow big business to develop monopolies over farmers and corn while reaping huge profits because of cheap corn. America now spends less of our income on food than any other generation in history (Pollan-2002). When you look at it in perspective, the agriculture our grandparents helped build was now growing fast food. This affecting our wallets, farmlands, and waistline.Some may say that our waistline and rate of disease are due to laziness and other fac tors. I disagree. I believe they are a direct relation to cheap, processed food made by cheap, industrialized corn. In order for us to decrease the consumption of corn, the government needs to cease its subsidizing of it. This will do two things. One, it let the markets adjust themselves at a rate that creates dependence on itself rather than assistance. Two, tighten the ability of lobbyist to affect change in agriculture and government policy that increase benefits to the very few.The bottom line here is this; big business reaps profits at the expense of the farmer. And the consumer? Well†¦. we are just scenery it seems in this great manipulation of industrialized food industry. And as I see it; in an economy where every dollar counts, doesn’t it make sense for the government to hang onto theirs? Pollan, Michael. The Omnivore’s Dilemma. â€Å"A Natural History of Four Meals†. April 2006 This well-known book has been called an â€Å"eater’s manifest o† by critics and peers alike. Pollan, Michael. What’s America Eating? Smithsonian, June 2006. Retrieved on October 4, 2012 http://michaelpollan. om/articles-archive/whats-eating-america/ An article, written with a chronological touch, that takes reader from â€Å"soup-to-nuts† on the history of corn and how it came to western America. Pollan, Michael. When Crop Becomes King. NY Times. July 2002. Retrieved on October 1, 2012 http://www. organicconsumers. org/toxic/toomuchcorn071902. cfm An article written in a way that is easily understood for most. This article describes Zea Mays (original term) from Central America to what we know today as corn Walsh, Bryan. â€Å"Getting Real About the High Price of Cheap Corn†.Time Magazine. August 21, 2009. http://www. time. com/time/magazine/article/0,9171,1917726-2,00. html Walsh is a senior writer for Time Magazine and a correspondent for the last 8 years Health Journalism Fellowship from the Center for Disease Con trol Foundation. As part of this fellowship, he attended training at the U. S. Centers for Disease Control during summer 2010. Wise, Timothy. Identifying the Real Winners from US Agricultural Policies. Tufts University. December 2005. Retrieved October 1, 2012. http://www. ase. tufts. edu/gdae/Pubs/wp/05-07RealWinnersUSAg. pdf

The Major Differences Between French and English