Computer science and information technology major personal statement Essay

Computer science and information technology major personal statement - Essay Example I noticed that the lock was very convenient since we never had to bring the key again. I started to dream about owning a smart house where electronics will do everything for us, such as tasks scheduling, voice commanding, decisions making, etc. Since coming to the U.S., I have seen people using iPhones to dim lights in their houses. I realized my dream is actually achievable, yet even that did not seem like enough. I want houses that are even â€Å"smarter†, and I wish one day everyone can own one of these houses. I want to customize my own smart house instead of those that exist already. Looking back on the past, I realize t that my dream had become more of a reality when I got to use computers.   The first time I used a computer I use it to play games only. I started to play a Japanese web game (livly) in 2005. By chance the game allowed me to customize my own homepage with HTML. I started to write simple HTML for my page. Eventually, I spent more time exploring the World Wide Web and discovered that there are programming languages for web pages which can do more than a markup language. I managed to read a book about PHP4 and MYSQL which I borrowed from the library. Although I did not have enough knowledge to understand everything, I read through the whole book and tried my best to understand all of the content. At the same time, my achievement in writing simple Visual Basic code in high school encouraged me even more to explore the computer field.   In 2009 I had a very special experience. I participated in a regional championship of the Worldskills Competition in Office and I was glad that I had learnt a lot in the field of software application from the training course I had taken. I was allowed to explore Microsoft Office at a deeper level by implementing VBA and the built-in library functions in Microsoft Excel. A year after I participated in another competition with participants from Hong Kong and Macau. I got a chance

English Literature Essay Example | Topics and Well Written Essays - 1250 words - 1

English Literature - Essay Example However, in the book, the overarching them is God’s providence and His role in determining the fates of the lives of men. This has something to do with the poet’s being a Christian, and thus the element of God ruling the lives of men. This is an important point to note since this has a very strong resonance all throughout the poem. In contrast, as one critic has written online on Christian Movie Reviews, â€Å"The most striking thing about the new Beowulf movie, though, was its ugliness.† The movie showed the ugly sides of the protagonists, which were, in fact, not how they were portrayed in the original poem. Before proceeding to an analysis of the characters, I will take note of the special technique used by the moviemakers. They employed the three-dimensional (3D) animation style wherein one has to wear special 3D glasses in movie theaters to be able to have a fully-enhanced experience of the gory battle scenes and killings. For the most part, this has added to the attraction of the movie, since there have been few animated movies produced which employed this special technique. As a critic from MovieFilmReview.com puts it: â€Å"Beowulf is a visually captivating movie experience.† However, on the contrary, another critic disagrees by writing in her blog: â€Å"†¦this example of the latest â€Å"advance† in animation technology is sterile, synthetic, almost completely unengaging on a human level. It’s animated but inanimate.† (flickfilosopher.com) The blogger simply found the way the movie has been done by Robert Zemeckis as totally devoid of real human expressions and emotions. Now, to an analysis of the characters. We begin with the identity of Grendel. In the book, it was written that he came from â€Å"Cain’s clan†, that is, to say, when Cain killed his brother Abel, it was purported that all the evil creatures which roam the earth were descendants of Cain whose sin was so vile that he could

The Handmaids Tale Essay Example for Free

The Handmaids Tale Essay The Handmaids Tale, written by Margaret Atwood, is set in two different times simultaneously, both being separate societies, with unlike moral principles. While Atwood describes the pre-Gilead society as one dealing with an unmanageable amount of injustices regarding women, since pornography, prostitution, and violence against women were getting out of the governments hands. Nevertheless, women were allowed to read in the pre-Gilead society, and had a wide amount of liberties compared to the ones handmaids in Gilead receive. Also, the society before Gilead was formed suffered from conflicts between religions and racial tensions, also known as the Sect Wars. On the other hand, Gilead, being the present society in the novel, shows a much more distant difference in liberties between both sexes. Women are used as procreation tools, and cannot have privacy whatsoever with the laws enforced by the system, such as not letting handmaids close their bedrooms door completely. Also, women arent allowed to read, like in the previous society, so that they cannot gain any knowledge. Ironically, it seems that both genders were having a better life in the previous society, which is described as chaotic, rather than in Gilead, even-though men have complete control over the law. Atwood writes about the reason of Gilead arising over the old society being an exponential decrease in birth rates. Another notorious difference between Gilead and pre-Gilead is that pre-Gilead tolerated homosexuality up to certain extent, while Gileads law declares the extermination of homosexual humans. As if the Catholic Church has lost the Sect Wars in the old society, priests or believers of such religion are also killed by the new system. Atwoods novel also describes numerous similarities between our current situation and the anti-utopian Gilead. Atwood describes the contrary of the rights gained by the feminists in the past century, including the legalization of abortion, which is being prohibited in Gilead. Other rights being undone by Gileads system are the right for women to vote, and their access to contraception devices. At the same time, Atwood criticizes the situation experienced in the 1980s regarding the fear towards pollution and infertility, by reflecting such dangers in the pre-Gilead society, and coming up with Gilead as the solution for both problems. A more recent issue mentioned in The Handmaids Tale is North Americas religious policies, which are unfair, and are expressed in an exaggerated way through the wall with the citizens who have suffered death penalty, and the Sect Wars. Elements that arent important in real life carry a large importance in The Handmaids Tale. Language is one of these devices, since its function in Gilead is to label each individual with his tribute to the society, making repression a result of such use. This makes the persecution of black (Children of Ham) people and Jews (Sons of Jacob) easier. Another factor used in Gilead is effective for the citizens of the society to bare the way they are treated. This is accomplished by pleasing women or other rejected or mistreated people with other things, such as power over the household, like it happens with Serena. Also, the romance Offred may have with Nick. Gilead also gives women the image that they are being protected from sexual violence by punishing rapists, but this is clearly false, since they are being used as prostitutes by the elite class. From such view, Gilead may be politically correct, but suffers from a way of corruption. In conclusion, Gilead differs from pre-Gilead because of its limited liberty to women, and its discrimination towards black, Jews, and catholic believers. Nevertheless, it offers more safety, but suffers from an improper use of power coming from men. This may be seen throughout the novel, where you can see that women are treated like objects of procreation. In a sense, Gilead has only brought inconformity into the world, as women cannot read, write, or do things by their own, and men live a boring life, according to their descriptions, as most have had their sexual and philosophical liberties taken away as well. I used to think of my body as an instrument, of pleasure, or a means of transportation, or an implement for the accomplishment of my will Now the flesh arranges itself differently. Im a cloud, congealed around a central object, the shape of a pear, which is hard and more real than I am and glows red within its translucent wrapping. (Chapter 13). This quote expresses that Offred feels her womb is now a states property, and that she has been oppressed by the society so that she appears to be just a superficial part of what she really is. Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Margaret Atwood section.

Water Soluble Vitamins for Poultry

Water Soluble Vitamins for Poultry The vitamins are a very important class of the nutrients. They play various important roles in the life cycle of any living-being. The absence or deficiency of the vitamins in poultry causes serious problems. The water soluble vitamins are very important sub-class of vitamins. In the poultry which can not synthesize these vitamins in their body these should be provided in the diets means these are dietary essential. The inclusion of the water soluble vitamins accurately, according to the needs of birds, production stage, physiological state of the birds and environmental conditions is very necessary to avoid the problems and to gain maximum performance because these vitamins are required by the birds in many systems including energy metabolism, growth, proper blood flow, development of skeleton, compensation of the stress, egg production, fertility, anti-oxidants for semen and proper development and viability of the growing embryos. It means these are not only important for current b irds but also their provision in an accurate way will ensure the next generation of the birds. Key words: roles, water soluble vitamins, poultry. Introduction The term vitamin was first used in 1912. Vitamins are a group of complex organic compounds which are present in minute amounts in natural feedstuffs. These are required for normal metabolism and the deficiency of these compounds in the feed causes deficiency diseases. The vitamins are divided into two groups depending upon their solubility i.e. Fat soluble vitamins which include Vitamin A, D, E and K. Water soluble vitamins which are Vitamin B-complex and vitamin C. The names, synonyms and the two classes i.e. fat and water soluble can be summarized as: Vitamin names Synonyms Fat soluble Vitamin A1 Retinol, retinal, retinoic acid Vitamin A2 Dehydroretinol Vitamin D2 Ergocalciferol Vitamin D3 Cholecalciferol Vitamin E Tocopherol, tocotrienols Vitamin K1 Phylloquinone Vitamin K2 Menaquinone Vitamin K3 Menadione Water soluble Thiamin Vitamin B1 Riboflavin Vitamin B2 Niacin Vitamin PP, Vitamin B3 Vitamin B6 Pyridoxol, pyridoxal, pyridoxamine Pantothenic acid Vitamin B5 Biotin Vitamin H, vitamin B8 Folic acid Folacin, folate, Vitamin M, Vitamin Bc, Vitamin B9 Vitamin B12 Cobalamin Choline Gossypine Vitamin C Ascorbic acid (Adopted from McDowell, 2004) Poultry and other monogastric animals are dependent on dietary sources of vitamins to a much greater degree than are ruminants. It is considered that animals with fully functional rumen can not suffer from a deficiency of vitamin B-complex. Vitamin B12 is unique in that it occurs in plant tissues as a result of microbial synthesis (McDowell, 2004). Thiamin (B1) is required to control appetite and reduces death rate, Riboflavin (B2) is responsible to control curly-toe paralysis, proper growth and proper egg production, Pantothenic acid(B5) is necessary for controlling dermatitis and improper lesions on the mouth and feet, Niacin (B3) is involved in proper confirmation of legs, tongue and mouth cavity, Choline ensures proper growth and proper egg production, Vitamin B12 is required to control anemia and to control early embryonic death, Folic acid (B9) is required for proper growth, controlling of anemia, proper feathering and proper egg production, Biotin (B8) is required to control d ermatitis o feet, around eyes and beak and Ascorbic acid(vitamin C) is required to normal growth and development, growth and repair of tissues, formation of collagen, cartilage, bones, avoid stresses and wound healing (Unknown, 2002). Vitamin C (vit C) is a water soluble antioxidant found in cytosol and extracellular fluids and it can directly scavenge super oxide hydroxyl radicals and single oxygen species (Clarkson and Thompson, 2000). It is thought to exert its effects on the immune system through the enhancement of neutrophil production and through protection of the cell against super oxide radical damage (Bendich et al., 1986). Under normal conditions birds can synthesize sufficient amounts of vit C (Roy and Guha, 1958), however in the stress conditions birds may require an external source of vit C (Meade S.M. 2004) to provide non-specific resistance against infections and overcome stress and therefore improving productivity (Pardue and Thaxton, 1985). The phagocyte activity is enhanced in the presence of vit C. There is a higher quantity of the superoxides found in the phagocytes when sufficient amounts of vit C are found and further increase in the level of vit C further increases the amount of free radicals in phagocytes (Scarpa et al., 1983; Som et al., 1983). Viral infections have been shown to cause a depletion of leukocyte ascorbate, which resulted in varying degrees of non-specific immunosuppression and a reduction in serum vit C concentration (Thomas and Holt, 1978; Bendich et al., 1986). The role of vit C in controlling of stress has been documented many a times. There was a proof that by providing external vit C source at a rate of 330ppm the blood levels of vit C are elevated (Nestor et al., 1972). Another study showed that a 1000ppm adding of vit C reduces exogenous cortisol related immunosuppression. Some studies have also reported that vit C decreases heat shock protein 70 and plasma corticosterone response in chicken subjected to cyclic heat stress (Mahmoud et al., 2003, 2004). Vitamin C supplementation in feed or water can also reduce the sensation of fear in the birds (Jones, R. B., 1996). Pardue and Thaxton (1986) documented the effects of supplementation with vit C on a number of characteristics including growth, reproductive performance, immunosuppression and mortality. It was also documented by Satterlee et al., 1989; Kutlu and Forbes, 1993a; McKee and Harrison, 1995) Poultry under intensive production systems are particularly susceptible to vit deficiencies so to avoid this poultry feeds are supplemented normally with B2, niacin, pantothenic acid, B12 and choline out of water soluble vitamins (Scott et all. 1982). It is to be noted that Thiamin, vitamin B6, biotin and folacin are mostly present in adequate quantities in the major ingredients such as corn-soybean meal-based diets and poultry can normally produce a sufficient amount of ascorbic acid by its own (McDowell, L. R. 2004). Vitamin needs of new strains developed for improved production are higher. Leg problems seen in fast growing strains of broilers can be corrected in part by higher levels of biotin, folacin, niacin and choline (Roche 1979). Stress and disease conditions in animals may increase the basic requirement for certain vitamins. Nutrient levels that are adequate for growth, feed efficiency, gestation and lactation may not be adequate for normal immunity and for maximizing the a nimals resistance to disease (Cunha 1985; Nockels et al. 1996). Diseases and microorganisms affecting the gastro intestinal tract reduce the absorption as well as the production of vitamins also the conditions affecting the G.I.T. cause a reduction in vitamin production and absorption i.e. diarrhea and vomiting (McDowell, L.R., 2004). Mycotoxins and internal bleeding in poultry also causes a reduced efficiency of vitamins (McDowell, L.R., 2004). Vitamin antagonists (antimetabolites) interfere with the activity of various vitamins (Oldsfield, 1987). Under commercial production a higher level of the vitamins is helpful for optimum production and performance this also helps in achieving best growth rates, feed utilization and health and in part also helps to increase body reserves (Coelho, 1996). The ascorbic acid acts as an antioxidant for the avian spermatozoa (Surai et all, 2001). Ascorbic acid supplementation enhances the ejaculation qualities of male fowl (Surai et all, 2001). In the hot and dry season offering the cold water supplemented with ascorbic acid increases weight gain and spleen but it will also cause a reduced size of wings (Abioja, et all, 2011). Classes of B-Complex Based on the functions the B-complex can be categorized into 3 classes, however some of the members fall into more than one class; Energy releasing Thiamine (B1), Riboflavin (B2), Niacin (B3), Pantothenic acid (B5), Piroxidine (B6), and Biotin. Hematopoietic Folic acid (B9), Cyanocobalamin (B12), Pantothenic acid (B5), and Piroxidine (B6). Other Thiamine (B1), Niacin (B3), Piroxidine (B6), Folic acid (B9), and Cyanocobalamin (B12). (Wilson, G. V.) Vitamin B-complex deficiencies Deficiency arises due to inadequate supplies of the vitamins and the signs develop over a time period. So if the vitamin levels provided are lower than the required levels then the classical deficiency signs will be seen in the birds. Generally the young and growing chicks are more prone to vitamin deficiencies and the developing embryo is the best model showing deficiencies of vitamins. Problems due to the B-complex deficiency arise quite abruptly and often seen in 5-7 days because there is a little storage of these in the body (Leeson, S. and J. D. Summers, 2001). In the researches carried out on poultry of different age groups it was shown that a deficiency in the availability of Thiamine (B1) caused a loss of appetite and increased death ratios (Poultry Health Services, 2009). Leeson, S. and J. D. Summers, 2001 stated that polyneuritis in the birds shows the later stages of thiamine deficiency which may arise due to the build up of the intermediates of carbohydrate metabolism. In mature birds it is seen approximately 3 weeks after they are being fed a thiamine deficient feed. Poultry may also suffer from neuromuscular problems, resulting in impaired digestion, general weakness, star gazing and frequent convulsions (Leeson, S. and J. D. Summers, 2001). A deficiency in the availability of Riboflavin (B2) caused increased occurrence in the curly toe paralysis, poor growth and poor egg production (Poultry Health Services, 2009). Many tissues especially epithelium and myelin sheath are affected due to feeding of a feed which is d4eficient in riboflavin and on postmortem the characteristic sign of riboflavin deficiency is marked enlargement of the sciatic and brachial nerve sheath with the sciatic nerve showing the most pronounced effects (Leeson, S. and J. D. Summers, 2001). A feeding programme with a deficient amount of Pantothenic acid (B5) is evident as occurrence of dermatitis and lesions on mouth and feet (Poultry Health Services, 2009). According to Leeson, S. and J. D. Summers, 2001 the major lesions due to deficiency of pantothenic acid involve nervous system, the adrenal cortex and the skin. Niacin (B3) deficiency is shown by bowed legs and inflammation of tongue and mouth cavity (Poultry Health Services, 2009). Leeson, S. and J. D. Summers, 2001 report that niacin deficiency is characterized by severe metabolic disorders of skin and digestive organs, signs being the loss of appetite, retarded growth, general weakness and diarrhea in the birds. A feeding programme having deficiency of pyridoxine (B6) is characterized by retarded growth, dermatitis, convulsions, anemia and there may also be reduced nitrogen retention (Leeson, S. and J. D. Summers, 2001). Choline deficiency is evident from poor growth, fatty liver, decreased egg production (Poultry Health Services, 2009). Leeson, S. and J. D. Summers, 2001 report the deficiency of choline in growing chicks is evident from poor growth and perosis. Cobalamin (B12) deficiency is shown by cases of anaemia, poor growth, embryonic mortality (Poultry Health Services, 2009). According to Leeson, S. and J. D. Summers, 2001 a deficiency of B12 in growing chicks showed decreased weight gain, decreased feed intake, poor feathering and poor nervous system. Folic acid (B9) deficiency is evident from poor growth, anaemia, poor feathering and poor egg production (Poultry Health Services, 2009). A deficiency of folic acid in the experimental birds caused macrocytic (megaloblastic) anemia and leukopenia i.e. reduced white blood cells (Leeson, S. and J. D. Summers, 2001). Biotin (B8) deficiency increases the dermatitis on feet and skin around eyes and beak (Unknown, 2004; Poultry Health Services, 2009; Roche 1979; Leeson, S. and J. D. Summers, 2001). The diseases and problem seen due to deficiencies of the water soluble vitamins in poultry can be summarized in the following table Deficient vitamin: Thiamine (B1) Evident deficiency signs: loss of appetite increased death ratios polyneuritis impaired digestion general weakness star gazing frequent convulsions Deficient vitamin:  Riboflavin (B2) Evident deficiency signs: curly toe paralysis poor growth poor egg production affected epithelium and myelin sheath Deficient vitamin:  Pantothenic acid (B5) Evident deficiency signs: dermatitis lesions on mouth and feet Deficient vitamin:  Niacin (B3) Evident deficiency signs: bowed legs inflammation of tongue and mouth cavity Loss of appetite retarded growth general weakness diarrhea Deficient vitamin:  pyridoxine (B6) Evident deficiency signs: retarded growth dermatitis convulsions anemia Choline poor growth fatty liver decreased egg production perosis Deficient vitamin:  Cobalamin (B12) Evident deficiency signs: anaemia poor growth embryonic mortality Decreased weight gain decreased feed intake poor feathering Poor nervous system. Deficient vitamin:  Folic acid (B9) Evident deficiency signs: poor growth anaemia poor feathering poor egg production leukopenia Deficient vitamin:  Biotin (B8) Evident deficiency signs: dermatitis on feet and skin around eyes and beak (Poultry Health Services, 2009; Roche 1979; Leeson, S. and J. D. Summers, 2001) Role of water soluble vitamins as Co-enzymes Riboflavin or vitamin B2 is a prosthetic part of over a dozen enzymes in the animal body including cytochromes reductase, lipoamide dehydrogenase, xanthine oxidase, L- and d-amino acid oxidase, histaminase and others all of which are vital for oxidation-reduction reactions involved in cell respiration (Leeson, S. and J. D. Summers, 2001). Niacin or nicotinic acid is important in more than 100 different enzymatic reactions (Rasmusson R.) It is the vitamin component in two important enzymes i.e. nicotinamide adenine dinucleotide (NAD) and nicotinamide adenine dinucleotide phosphate (NADP) reported by Leeson, S. and J. D. Summers, 2001. Pantothenic acid (B5) is the prosthetic group of coenzyme A, an important coenzyme involved in many reversible acetylation reactions in carbohydrate, fat and amino acid metabolism (Leeson, S. and J. D. Summers, 2001). Biotin (B8) is an essential co-enzyme in carbohydrate, fat and protein metabolism (Leeson, S. and J. D. Summers, 2001). Vitamin B12 is an essential part of several enzyme systems, with most reactions involving the synthesis of one carbon units i.e. methyl groups (Leeson, S. and J. D. Summers, 2001). Role of Ascorbic acid (vitamin C) in birds under stressful conditions The efficacy of supplementing birds with vitamin C under stressful conditions depends upon its ability to elevate plasma vitamin C (Pardue et al., 1984). Nestor et al., (1972) reported that 330ppm vitamin C elevated blood vitamin C. Pardue et al., (1984) reported that vitamin C supplementation at a rate of 250ppm increased plasma vitamin C concentrations in broilers. But Sell et all in 1997 found that 300 mg/kg vitamin C was unable to increase plasma vitamin C levels. Kolb (1984) strongly suggested that supplemental vitamin C should be provided in poultry and livestock diets as a stress alleviator. Hill and Garren (1958) agreed and stated that vitamin C was an essential nutrient in chickens experiencing stress. Vitamin C supplementation at 300 mg/kg was able to decrease plasma corticosterone in stressed birds. These responses are supported by research suggesting that vitamin C suppresses adrenocortical steroidogenesis and depresses plasma corticosterone levels, therefore limiting som e of the deleterious responses associated with stress and delays the depletion of steroid hormone precursors (Pardue et al., 1985; Gross, 1992; Kutlu and Forbes, 1993). The action of vitamin C on adrenal steroidogenesis is associated with its ability to inhibit adrenal steroid hydroxylating enzymes (Kitabchi, 1967). Supplementation with 300 mg/kg of ascorbic acid resulted in a significant increase in plasma vitamin C throughout the experiment when compared to the Un-Supplemented birds (Meade, S.M., 2004). There is limited research examining the effects of vitamin C on lymphocyte subset populations in chickens. However, those experiments that have been demonstrated the effects of vitamin C on lymphocyte populations in association with disease or vaccination (Wu et al., 2000). The effect of dietary vitamin C supplementation is still controversial however vitamin C supplementation at 300 mg/kg alleviated stress-induced affects (Meade, S.M., 2004). These physiological and immunological findings suggest that vitamin C may be an anti-stress agent and may be an essential nutrient in poultry when poults are subjected to stressful conditions (Meade, S.M., 2004). Ascorbic acid as an anti oxidant for avian spermatozoa Ascorbic acid or vitamin c is water soluble anti oxidant present at high molar concentrations in spermatozoa and seminal plasma in a large number of animals. In poultry its concentration in semen averages 210 +-16.4microM (Surai et all 1986b). On a molar basis this concentration was more than 2.5 times higher than glutathione and more than 100 fold higher than alpha-tocopherol. Ascorbic acid was found almost equally distributed between spermatozoa and seminal plasma (Surai et all 1986b). This data was very useful in the development of an idea that vit. C plays an important role as a water soluble anti oxidant in the avian seminal plasma (Surai et all, 2001). Ascorbic acid effect on ejaculation quality of male Fowl Monsi and Onitchi in 1991 reported that fowl males housed under hot and humid conditions and supplemented with ascorbic acid showed a better overall ejaculation quality i.e. semen volume, motile sperm proportion and sperm number per ejaculate. The reported ascorbic acid supplementation level was 500mg/kg. However sperm motility was not affected. Dietary supplementations of ascorbic acid had the effects on semen of rainbow trout reflected by increased sperm motility and decreased decline in fertilizing capacity of spermatozoa after storage (Ciereszko and Dabrowski, 2000). A protective role of ascorbic acid in maintaining the sperm quality was also reported by Ciereszko and Dabrowski in 1996. However the low dietary levels of vitamin E and C (ascorbic acid) had no effects on the spermatozoa in mice rather the increased and higher supplementary levels decreased the number of spermatozoa/mg epididymis and increased the percentage of spermatozoa with misshapen heads (Ten et all, 1997). Role of ascorbic acid in weight gain A study was carried out in SW Nigeria on a group of broiler chicken. The birds were divided into four groups after the age of three weeks. A group was given cold water without any ascorbic acid and other group was given cold water with supplementation of ascorbic acid. Similarly two groups were made for normal unchilled water with and without ascorbic acid provision. The results of study showed a marked superior growth of breast meat and spleen in the group provided with cold water and ascorbic acid. However there was no affect of ascorbic acid supplementation on the growth parameters of the birds in any of the four groups. In addition there was a decreased wing length seen in these birds. The reason for this phenomenon to happen is that in hot climatic conditions a lot of the energy is wasted in panting and when cold water is provided the birds feel comfort and there is less panting seen. Also in stress corticosteroids are released which further decrease the weight gain. By providin g cold water these both conditions are avoided so better results are obtained. The cold water resulted in an overall more weight gain weekly and finally more live weight however decreased wing length, the vitamin c had no effect on the growth however it increased the breast meat and the spleen in birds, (Abioja, et all, 2011). Role of water soluble vitamins in Energy metabolism The transformation of dietary energy sources, such as carbohydrates, fats and proteins into cellular energy in the form of ATP requires several micronutrients as coenzymes and cofactors of enzymatic reactions, as structural components of enzymes and mitochondrial cytochromes, and as active electron and proton carriers in the ATP-generating respiratory chain(Groff et all, 1996, Depeint et all, 2006): (i) thiamine pyrophosphate (TPP; vitamin B1), CoA (containing pantothenic acid), flavin mononucleotide (FMN; derived from vitamin B2), flavin adenine dinucleotide (FAD; derived from vitamin B2) and nicotinamide adenine dinucleotide (NAD; derived from nicotinamide) are involved in the Krebs cycle and complexes I and II of the respiratory chain; (ii) biotin, CoA and FAD are involved in haem biosynthesis, which is an essential part of the cytochromes and important for the latter part of the mitochondrial respiratory chain; (iii) succinyl-CoA can feed into either the respiratory chain or the Krebs cycle depending on the needs of the cell. Depeint et all, in 2006 confirmed the essential role of vitamins B6, B12 and folate in maintaining the mitochondrial one-carbon transfer cycles by regulating mitochondrial enzymes. The same authors also emphasized the essential role of the B vitamin family in maintaining mitochondrial energy metabolism and how mitochondria in their role as the cellular organelles responsible for energy metabolism are compromised by a deficiency of any B vitamin (Depeint et all, 2006). Table given here summarizes the present state of knowledge with regard to the role or roles of individual water soluble vitamins in energy metabolism (adopted from Institute of medicine, 1998). Vitamins Function in energy metabolism Thiamine (B1) Essential cofactor in the conversion of carbohydrates to energy. Needed for normal muscle function, including the heart muscle. Involved in oxidative carboxylation reactions, which also require manganese ions. Riboflavin (B2) As a cofactor in the mitochondrial respiratory chain, helps in the release of energy from foods. Component of the main coenzymes FAD and FMN. Nicotinic acid, niacin (B3) As a cofactor in the mitochondrial respiratory chain, helps in the release of energy from foods. Transformed into NAD and NADP, which play a key role in oxidation -reduction reactions in all cells. Pyridoxine (B6) Helps in the release of energy from foods. Used as a cofactor by nearly 100 enzymatic reactions, mainly in protein and amino acid metabolism. Vitamin B12 Essential for metabolism of fats and carbohydrates and the synthesis of proteins. Interacts with folic acid metabolism. Biotin As a cofactor, involved in metabolism of fatty acids, amino acids and utilization of B vitamins. Pantothenic acid Plays an essential role in the Krebs cycle. Component of coenzyme A. Vitamin C Essential for synthesis of carnitine (transports long-chain fatty acids into  (Ascorbic acid) mitochondria) and the catecholamines, adrenaline and noradrenaline. Ascorbic acid facilitates transport and uptake of non-haem iron at the mucosa, the reduction of folic acid intermediates, and the synthesis of cortisol. Potent antioxidant. Folic acid Folates function as a family of cofactors that carry one-carbon (C1) units required for the synthesis of thymidylate, purines and methionine, and required for other methylation reactions. Folate is essential for metabolic pathways involving cell growth, replication and survival of cells in culture. Around 30 50% of cellular folates are located in the mitochondria. Toxicity arising due to water soluble vitamins Toxicities arise due to over supplementation levels or more inclusion rates of the nutrients. Generally the toxicity of the water soluble vitamins is not seen in the birds because of the reason that these vitamins have a very minimal storage in the body. If the inclusion rate of vitamin B-complex is at least 100x than the required level, it tends to cause toxicity in the poultry. Vitamin C, E and Biotin are moderately toxic, potentially causing problems at 20-30x the normal inclusion levels. Toxicity of vitamins administered in the drinking water is quite rare because the birds are reluctant to drink such fortified water (Leeson, S. and J. D. Summers, 2001). Conclusion From above discussion it can be concluded that the water soluble vitamins play many important roles in the poultry life including proper growth, production, weight gain, egg production, immunity, proper conformity, proper functioning, avoiding of stress due to many origins, proper feathering, proper skin condition and proper embryo development. The water soluble vitamins are required in the metabolism, in the oxidation and reduction reactions as coenzymes which mean these are vital for the survival of the animals. These also enhance the quality of the ejaculation in male fowl as well a act as antioxidants for the avian spermatozoa ensuring the fertility and avoiding deformities in the semen of poultry. The water soluble vitamin family member, ascorbic acid is also involved in extra gain of the breast meat which is most liked part of chicken meat in general.

Baldwins Father in Notes of a Native Son Essay -- James Baldwin

Playgrounds of Harlem Narrative is a form of writing used by writers to convey their experiences to an audience. James Baldwin is a renowned author for bringing his experience to literature. He grew up Harlem in the 1940’s and 1950’s, a crucial point in history for America due to the escalading conflict between people of different races marked by the race riots of Harlem and Detroit. This environment that Baldwin grew up in inspires and influences him to write the narrative â€Å"Notes of a Native Son,† which is based on his experience with racism and the Jim-Crow Laws. The narrative is about his father and his influence on Baldwin’s life, which he analyzes and compares to his own experiences. When Baldwin comes into contact with the harshness of America, he realizes the problems and conflicts he runs into are the same his father faced, and that they will have the same affect on him as they did his father. Baldwin’s father died a broken and ruined man on July 29th, 1943. This only paralleled the chaos occurring around him at the time, such as the race riots of Detroit and Harlem which Baldwin describes to be as â€Å"spoils of injustice, anarchy, discontent, and hatred.† (63) His father was born in New Orleans, the first generation of â€Å"free men† in a land where â€Å"opportunities, real and fancied, are thicker than anywhere else.† (63) Although free from slavery, African-Americans still faced the hardships of racism and were still oppressed from any opportunities, which is a factor that led Baldwin’s father to going mad and eventually being committed. Baldwin would also later learn how â€Å"†¦white people would do anything to keep a Negro down.† (68) For a preacher, there was little trust and faith his father ... ...his father had acted the way he did, which caused him to be committed. He was facing the same experiences and the same side-effects his father once felt. However, faced with this dilemma between acceptance and equal power, Baldwin looks to the only man he can trust to help him, his father. He trusts his father because he knows that his father went through the same dilemma he is going through, he has seen the same affects in his father’s rage and hate. However, his father already passed away, and what help that could have been gathered from his father is gone; Baldwin can only piece together his memories of his father’s character and life and compare it to his own to see how the two are really alike. Works Cited Baldwin, James. â€Å"Notes of a Native Son.† 1955. James Baldwin: Collected Essays. Ed. Toni Morrison. New York: Library of America, 1998. 63-84.

Essay --

Chris Nguyen Xxxxxx Xxxxxx 27 December 2013 Socialization and Stigmatization of HIV/ AIDS in Developing and Developed Societies: A Comparative Survey of Selected Recent Literature Introduction In the last thirty years the social perception of HIV/ AIDS has changed dramatically in the public conscious. The disease itself has shifted from being a baffling virus in the 1960s and 1970s, to the offensively termed â€Å"Gay-related immune deficiency† or GRID, to finally being termed the Human Immune-deficiency Virus (HIV) and Acquired Immune Deficiency Syndrome (AIDS) by the Center for Disease Control and Prevention (CDC) in the 1980s. Despite scientific advances in modern medicine, the perception of the illness is still highly sexualized and carries a deeply negative stigma, especially in economically developing societies. In this paper I will analyze a selection of current literature to gain understanding of how HIV/ AIDS first came into existence and how it was initially perceived in the public conscious. From this same pool of recent literature I will examine sub-Saharan African societies, specifically cases in Tanzania and South Africa, as well as the socio-politic al context surrounding HIV/ AIDS governance in present-day China. In contrast, I will also draw from an article that discusses stigma experienced by HIV-positive women living in Canada- a developed society. Despite the reams of scientific literature on the subject, public consciousness about living with HIV/ AIDS and preventing its transmission in developing and developed societies remains low. Cultural and Socio-political Perceptions of HIV Infection Modern perceptions of HIV and AIDS are driven by archaic and outdated social stigma that has existed since the discovery ... ...gical sense. Obviously people observe different cultures and norms across all of the world’s societies. In order to address a common problem across uncommon environments, problem-solvers must seek-out culturally appropriate means and methods for confronting any given issue. HIV and AIDS- related stigma is a problem that has plagued social society since the discovery of the illness. Even the most developed societies like Canada are not immune to prejudice and bias. As such, much responsibility falls upon educated people to share the importance of sexual and reproductive health with those who may not have access to the same level of quality education. While history has already written bias and stigma into the lives of those who have lived and continue to live with HIV or AIDS, the phenomenon of bias can be understood. And with understanding comes the hope for change.

Legality of the bill of rights

School is a private school with 300 students ranging from grade 7 to 12, and 30 staff members and teachers. At the request of Principle Symons, an asset list followed by a qualitative risk assessment was conducted and documented In order to ensure the proper level of protection required for each asset. There are two servers running services for Premier Collegiate School, the first for administration businesses and the second for the student's needs.These servers are critical to the confidentiality, Integrity, and availability of this schools services and business functions. Data housed on these servers must be protected and kept confidential, and the proper authorization and authentication methods should be Implemented as well. The principle maintains a notebook computer that is used for both business and personal uses and therefore is critical in maintaining a secure environment at all times and even remotely. Students are required to have privately owned laptops so he same type of security would also be required as well.These critical assets either generate revenue or represents intellectual property of the organization. Other assets such as the administrators, teachers, and student desktops provided by Premier Collegiate School would be considered major because it contains customer privacy data that must be properly protected. Other major assets include routers, switches, wireless access points, cabling, and server racks. IT personnel, students, and staff are also considered security risks and therefore he proper level of user security awareness training, workshops, and seminars should be provided to users on the network.Other security measures such as an acceptable usage policy and password policies should be properly implemented to ensure users are responsible for and understand their actions on the network. In addition, It would be best practice to implement the proper administrative, technical, and physical safeguards to properly secure each asset. Admin istrative safeguards are actions and rules implemented to protect information. Technical safeguards are applied to reward and software information systems.Physical safeguards are actions that an organization takes to protect Its actual, tangible resources. Unit 1 Assignment 1 in order to ensure the proper level of protection required for each asset. There are confidentiality, integrity, and availability of this schools services and business and the proper authorization and authentication methods should be implemented as are responsible for and understand their actions on the network. In addition, it would organization takes to protect its actual, tangible resources.