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Essay / A review and analysis of the role of yeast in the...
Understanding the brewing process will help explain the time limitations of brewing and storing beer, and will ultimately help explain how this brewing arm Iron arose because the brewing process itself was largely responsible for the limited availability of beer in early American history. The process begins with malted barley which is heated and held at a temperature between 60° and 71° C. This process is known as mashing and serves to activate amylase enzymes which convert complex starches into fermentable sugars and non-fermentable. The wort is then transferred to a kettle where the hops are introduced and the liquid is extensively boiled to isomerize the bitter oils contained in the hops. In their isomerized states, these oils will be more soluble and capable of imparting their bitter qualities to the must. Finally, the wort is cooled as it is transferred to a fermenter and yeast is added to begin fermentation. The fermenter is isolated from the environment to prevent oxygen, which would stop fermentation, from entering. Fermentation should then be carried out at cool temperatures – around 18°C with brewer's yeast and much colder with lager yeast. Fermentation above these temperatures will still occur but will result in an unpalatable product. These temperature requirements made beer a seasonal beverage and limited storage before the advent of mechanical refrigeration. Fermentation is the biological process that allows humans to brew beer or any other alcoholic beverage. This process occurs in the absence of oxygen, allowing the cell to produce adenosine triphosphate (ATP), the cellular energy source. Although little energy can be produced in this way, it allows the yeast to survive middle of paper......the founding pilgrims. Bulletin of the New York Academy of Medicine, 47(2), 147-160. Comparison of ethical views of Christian denominations. (nd). Retrieved from Religion Facts: http://www.religionfacts.com/christianity/charts/denominations_ethics.htmLevine, H. G. (1984). America's Alcohol Problem: From Temperance to Alcoholism. BritishJournal of Addiction, 79(1), 109-119.McCleskey, C. (2011). Methodists: Drinking remains a sensitive subject. Christian Century, 128(8), 16. Alcohol Resolution. (1982). Retrieved from Southern Baptist Convention: http://www.sbc.net/resolutions/91Rudin, M. (2002). Beer and America. American Heritage, 53(3), 28-38.Stewart, GG (2004). The chemistry of beer instability. Journal of Chemical Education, 81(7),963-968.Warner, Jessica (2009). Temperance, alcohol, and American evangelicalism: a reevaluation.Addiction, 104, 1075-1084.