About chemistry Essay Example | Topics and Well Written Essays - 750 words

About chemistry - Essay Example This paper discusses the role of chemistry in wine making, particularly the chemical components carbohydrates and organic acids. The effect of temperature in the process of wine making will also be discussed. CARBOHYDRATES . Sugars are a sub-class of carbohydrates. This molecules take the biggest role in the fermentation process because they are ones that turn into alcohol. Fructose and glucose are the sugars that are most important in wine making. There are sugars such as pentoses and pectins that are present in the juice that does not really contribute to the fermentation process, but gives the wine its hazy characteristics (New Zealand Institute of Chemistry, n.d.). ORGANIC ACIDS. Tartaric acid and malic acid are two of the principal acids found in grapes, and they are important molecules in grapes because they provide the acidity of the wine. The acids provide a pH range of about 3.2 - 3.3, which serves as a buffer system. Succinic acid is present in wine but not in the grape juice which implies that its formation occurs during the fermentation process. It is important that the acidity during wine making is at its optimum level to provide the best condition for fermentation. Because yeasts are living microorganisms, they are supposed to live at their most natural environment to be able to thrive well and properly work on the sugars in the juices. Grapes which are too sweet have high pH values resulting to less subtle wine flavors. To prevent this, pH of the juice prior to fermentation is checked, and if found to be high, tartaric acid is added before loading up the yeast (Uva, 2013). TEMPERATURE. The temperature requirement in the manufacture of wine must not exceed 15.3Â ºC (60Â ºF) for white wines, and 29.4Â ºC (85Â ºF) for red wines. The conversion from sugar to alcohol with the evolution of carbon dioxide releases heat, so it is important that the temperature be always maintained. Low

How did the designations aliens ineligible for citizenship and the Research Proposal

How did the designations aliens ineligible for citizenship and the yellow peril negatively affect Asian Americans in the years prior to 1952 - Research Proposal Example Second, this designation led to separated or hurt families (Hutchison 44). Such families suffered mental effects because of this designation. Male-controlled familial structures among Asian Americans were not common in the United States before 1952. The statistical and social supremacy of Chinese males, together with domestic separation and customary diversity extended the assimilation procedure for Asian immigrants. This is the third negative effect of this designation that also allowed the dominant perception of Asian Americans as alien immigrants (Brilliant 34). Fourth, the â€Å"Aliens Ineligible for Citizenship† policy led to increased demands for Asian prostitution because of the absence of Asian women (Brilliant 34). Frequently disguised as business wives, selected Americans drew or bought and shipped women from Asian nations like China to serve as prostitutes in the United States. Shortly afterwards, Asian prostitution was perceived as an annoyance alongside West Coast and legislators responded by passing the Page Law in 1875. This law enabled customs officials at ports to refute entrance to Asian women believed to be imminent prostitutes in the United States (Brilliant 36). The designation â€Å"Yellow Peril† radically transformed into one of the approvals as Asian success tales began becoming increasingly common all through the American community (Allred 58). Before this transformation, this policy was the source of some of the worst discriminations against Asian Americans in history. This designation coined the phrase â€Å"model minority† to refer to Asian in the United States (Allred 61). This phrase acted as a model for other minorities. As a result, Asian Americans became a widespread outcast in America and suffered more discrimination than any other minority group. Secondly, as a type of subtle discrimination, the â€Å"Yellow Peril† designation fostered the spread