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Production of alcohol by fermentation
Synthesis of ethanol by fermentation
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Recommended: Production of alcohol by fermentation
The History of Fermentation
It is impossible to set a date as to the first time fermentation was performed. It is possible, however, to guess, and this guess is roughly 8,000 years ago. Wine has been written about for centuries, in the Greek and Roman myths and scriptures. The Greek god of wine, Dionysius, was in charge of the fermentation atop Mount Olympus. The people of this time may not have known exactly what they were doing, but it was a somewhat complicated procedure. The crushing of grapes, and the storing of their juices led to an amazing beverage that is still used in current society. This process of fermentation was used throughout the time of early Christianity, and other religions, for purposes within sermons. Throughout the Renaissance, fermentation was used in the making of wine as well as bread, not to mention new medical applications. Fermented products were brought to America along with the new settlers. With new government, though, America was put into a prohibition, which did not last long. Today, fermentation processes are carried out nearly perfectly, without too large of variations among the products.
Although fermentation has been known of for at least 8,000 years, in 1865 Louis Pasteur was the scientist who really discovered the process of fermentation. At this time, Pastuer was the Dean and professor of chemistry at the Faculty of Sciences in Lille, France. He was originally asked by a friend to investigate difficulties he was having manufacturing alcohol by the fermentation of beetroot. Often, instead of alcohol, the fermentations were resulting in lactic acid. At that time, fermentation leading to the production of wine, beer, and vinegar was believed to be a simple and straightforward breakdown of sugar to the desired molecules. It was believed that the chemical breakdown of sugar into alcohol during the fermentation of wine and beer was due to the presence of inherent unstabilizing vibrations. Yeast cells were found in the fermenting vats of wine and were known as living organisms, yet they were only believed to be either a product of fermentation or catalytic ingredients that provided useful ingredients for fermentation to proceed.
The brewers of wine, beer, and vinegar were having horrible times with quality control. Yields of alcohol might suddenly fall off; wine might unexpectedly grow ropy or sour or turn to vinegar;...
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...s that the fermentation leading to the creation of ethanol has made billions and billions of dollars in profit, along with giving millions of people jobs. It is amazing that something that has had such a large impact on the world (as the fermentation of ethanol has) begins on the molecular level.
Bibliography
1. Abedon, Stephen T. “Glycolysis and Fermentation”. http://www.phage.org/biol1095.htm, July 29, 2000.
2. “Alcohol Fermentation”. Microsoft Encarta Encyclopedia 2000.
Harden, Arthur. Alcoholic Fermentation. New York, NY: Longmans, Green and Co., Ltd., 1932.
3. Boyer, Rodney. Concepts in Biochemistry. Pacific Grove, CA: Brooks/Cole Publishing Company, 1999.
4. “Cellular Respiration and Fermentation”. http://fhis.gcal.ac.uk/bio/micro/drjrattray/cab2/cab2resp.htm#Fermentation, July 30, 2000.
5. “Chemical of the Week – Ethanol”. Chicago Tribune (online); http://www.scifun.chem.wisc.edu/chemweek/ethanol/ethanol.html, July 29, 2000.
6. Harden, Arthur. Alcoholic Fermentation. New York, NY: Longmans, Green and Co., Ltd., 1932.
7. “What is Ethanol?”. Ace Page Links, http://www.ethanol.org/ethanol_info2.html, July 27, 2000.
Zora Neale Hurston’s, Their Eyes Were Watching God tells about the life of Janie Crawford. Janie’s mother, who suffers a tragic moment in her life, resulting in a mental breakdown, is left for her grandmother to take care of her. Throughout Janie’s life, she comes across several different men, all of which end in a horrible way. All the men that Janie married had a different perception of marriage. After the third husband, Janie finally returns to her home. It is at a belief that Janie is seeking someone who she can truly love, and not someone her grandmother chooses for her. Although Janie eventually lives a humble life, Janie’s quest is questionable.
Understanding the process of brewing will help explain the time limitations of brewing and storing beer, and will ultimately help explain how this tug of war came into existence, as the process of brewing itself is largely responsible for the limited availability of beer early in American history. The process begins with malted barley which is heated to, and held at, a temperature between 60o and 71o C. This process is known as mashing and serves to activate the amylase enzymes which convert the complex starches into fermentable and unfermentable sugars. The wort is then transferred to a boil kettle where hops are introduced and the liquid is boiled extensively to isomerize the bittering oils in the hops. In their isomerized states, these oils will be more soluble and able to impart their bittering qualities into the wort. Finally the wort is chilled as it is transferred into a fermenter and yeast is added to begin the fermentation. The fermenter is sealed from the environment to prevent oxygen, which would stop fermentation, from entering. Fermentation must then be carried out at cool temperatures – about 18o C when using ale yeast and much colder when using lager yeast. Fermentation above these temperatures will still occur but yields an unpalatable product. These temperature requirements made beer a seasonal beverage and limited storage prior to the advent of mechanical refrigeration.
If we would see above the earth, clouds swirling above the earth and how everything is in motion. He talks about cells and how they can catch energy. The earth made its own membrane and needed time for the formation of oxygen.
In, Their Eyes Were Watching God, the author takes you on the journey of a woman, Janie, and her search for love, independence, and the pursuit of happiness. This pursuit seems to constantly be disregarded, yet Janie continues to hold on to the potential of grasping all that she desires. In, Their Eyes Were Watching God, the author, Zora Hurston illustrates the ambiguity of Janie’s voice; the submissiveness of her silence and the independence she reclaims when regaining her voice. The reclaiming of Janie's independence, in the novel, correlates with the development and maturation Janie undergoes during her self discovery.
In Their Eyes Were Watching God, Janie Crawford confronts social and emotional hardships that shape who she is from the beginning to the end of the novel. Living in Florida during the 1900s, it was very common for an African American woman to face discrimination on a daily basis. Janie faces gender inequality, racial discrimination, and social class prejudice that she is able to overcome and use to help her develop as a person.
The Roman writer and naturalist Pliny the Elder, in his treatise Naturalis Historia states “there is nothing more useful than wine for strengthening the body, while, at the same time, there is nothing more pernicious as a luxury, if we are not on our guard against excess.” Years before he wrote those words, wine had in fact come from humble origins outside Italy itself. Furthermore, the process of fermenting grapes goes back thousands of years, and its beginning can be traced to where the wild grown grape-vine, vitis vinifera, flourished and was actively utilized for this reason.
Their Eyes Were Watching God is a story centered on the idea of life cycles. The experiences that Janie faces and struggles through in her life represent the many cycles that she has been present for. Each cycle seem to take place with the start of each new relation ship that she faces. Each relationship that Janie is involved in not just marriages, blooms and withers away like the symbol of Janie's life the pear tree from her childhood.
Their Eyes Were Watching God is a novel that presents a happy ending through the moral development of Janie, the protagonist. The novel divulges Janie’s reflection on her life’s adventures, by narrating the novel in flashback form. Her story is disclosed to Janie’s best friend Phoebe who comes to learn the motive for Janie’s return to Eatonville. By writing the novel in this style they witness Janie’s childhood, marriages, and present life, to observe Janie’s growth into a dynamic character and achievement of her quest to discover identity and spirit.
In a History of the Worlds in Six Glasses, Tom Standage describes beer as one of the oldest beverage. According to Standage the discovery of beer was around 10,000 BCE, it was made from grain that grew in the region called Fertile that could be stored and made wet or soaked to turn into beer (p 15). Beer was shared with several people and goes on to become a social drink. Standage goes on to explain about another beverage made with wild grapes vines produced between 9000 and 4000 BCE in northern Iran (p 47). Wine became a symbol of social differentiation and a form of conspicuous consumption. In this essay I will describe how Tom Stranger’s text discusses the relationship between beer and wine with their social behaviors and their different beliefs in religion Mesopotamia, Egypt, Greece and Rome have.
In the span of only a few pages, L.B. Church has given us an overview of the winemaking process. He has done so with sufficient detail for those in the chemistry community to follow along, yet still in a cursory enough manner as to not bog them down with the unnecessary. Written as if it were the procedure of an experiment, he has given enough information for the experiment to be repeated, tested, validated and improved upon. And that is almost assuredly his goal from the very beginning, as it must be for any published author in the chemistry community.
In Their Eyes Were Watching God, Zora Neale Hurston portrays the journey of Janie Crawford as an African American woman who grows and matures through the hardships and struggles of three different marriages. Although Janie is an African American, the main themes of the novel discusses the oppression of women by men, disregarding race. Janie gets married to three different men, aging from a young and naive girl to a mature and hardened women near the age of 40. Throughout the novel, Janie suffers through these relationships and learns to cope with life by blaming others and escaping her past by running away from it. These relationships are a result of Janie chasing her dreams of finding and experiencing true love, which she ultimately does in the end. Even through the suffering and happiness, Janie’s journey is a mixture of ups and downs, and at the end, she is ultimately content. Zora Neale Hurston utilizes Janie’s metaphorical thoughts and responses of blame and escape, as well as her actions towards success and fulfillment with her relationship with Tea Cake, to suggest that her journey
When we learn about the history of the world we usually divide it up into eras, dynasties, major wars, revolutions, etc. But what we all learn is that even the smallest thing can have a massive impact on history. In this book, Tom Standage chose to look at the way six different beverages altered history. I never knew how important different beverages were throughout history, but Standage was able to prove that beverages were responsible for global revolutions, intellectual and political insights, and good motivators for work.
Throughout the study of how beer changed civilization, I have come to realized the way “A History Of The World In 6 Glasses” explains the founding of beer and the positive impact it has left on the beginnings of civilization very accurately. Beer truly has impacted civilization due to the many positive opportunities beer has led society to. The alcoholic beverage surprisingly was the reason mathematics was invented. The farmers would have to calculate who’s crop land was who’s, so the required measuring and diving up land. It is hard to believe that a very common beverage that is served at every restaurant basically led to the invention of mathematics. Now a days mathematics is used on a day to day basis for almost every human being. After extensive research it is safe to say the the founding
Edmondson, J. (2009). Let's be clear: How to manage communication styles. American Society for Training & Development, Inc., 63(9), 30-31. Retrieved from http"//go.galegroup.com/ps/i.do?id=GALE|A212767598&v=2.1&=novaseu_main&it=r&p=ITOF&sw=w&asid=0abb8dfff77dba5f747cb1b4c13a9d9f
Alcohol is a class of organic compounds that is characterized by the presence of one or more hydroxyl groups (-OH) attached to a carbon atom. Alcohol was unknowingly produced centuries ago when fermentation occurred to crushed grapes (Pines, 1931). In today’s society alcohol is produced for the use of household products such as varnishes, cleaning products, but is more commercially important in the liquor business. A chemical process called fermentation accomplishes the production of ethanol, the alcohol or liquor. From there, the ethanol goes through distinct processes to become the dark and clear liquors on the store shelves.