DNA and the Gene: Synthesis and Repair 1) Watson and Crick elucidated the structure of DNA in 1953. Their research built on and helped explain the findings of other scientists‚ including ________. A) X-ray diffraction studies by Rosalind Franklin and Maurice Wilkins. B) Chargaff’s rules: C = G and T = A. C) Scientists who recognized that a nucleotide consisted of a sugar‚ a phosphate‚ and a nitrogen-containing base. D) All of the above were important considerations in the elucidation of
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Synthesis of Acetanilide By: Rick Whitely April 9‚ 2013 Organic Chemistry Lab 1; Professor J. Hutchison Recrystallization is a common method of purifying organic substances through the differences in solubility at different temperature. In this experiment‚ acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heated water bath. The solution was cooled slowly in an ice bath as crystals form out. As the compound crystallizes
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SYNTHESIS OF ESTERS USING GREEN AND NON-GREEN CHEMISTRY Abstract Esters are a class of organic compounds with the general formula RCOOR’. Ester also contributes the flavor and aromas in fruits and flowers. The esterification reactions will use in the procedure‚ which are the interaction of a carboxylic acid with an alcohol‚ aided by an inorganic acid catalyst (H2SO4). Moreover‚ the green method will not use any catalyst but using heating source instead (microwave). Based on the comparison of
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The purpose of this experiment is to synthesize isopentyl ester by an esterification reaction between a carboxylic acid and an ester. Carboxylic esters‚ like isopentyl acetate‚ are normally used to create artificial flavors. In the preparation of isopentyl acetate‚ esterification of acetic acid and isopentyl alcohol occurs. Esterification is an equilibrium shift to the product side using an excess of one of the starting components. In this experiment‚ the excess reagent is acetic acid because it
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Peter Mehnert Rhet 105 Ms. Paterson 11/14/12 Extended Synthesis: Cigarette Smoking Tobacco has played an important role in America from the beginning. It was grown as a cash crop by the Jamestown settlers in 1612‚ but over the years the popular opinion has changed about tobacco. Tobacco is used to make cigarettes‚ which have been extremely popular‚ now known to be extremely dangerous. Even the warnings on the cigarette box have changed to a statement much more alarming. In the 1960s‚ the warning
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Synthesis of Information In summary‚ the articles researched were divided into four main categories. The categories all focused on something different. The categories were; the perception kids have on food‚ communities raising healthy kids‚ nutritional awareness and the school context. The first two articles had the common theme of how children view food and to find what children thought and felt about healthy food. The third article was aimed towards parents. The theme of this article was how
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Chris Goodman Essay Assignment #2: Explanatory Synthesis Explanatory Synthesis of Childhood Obesity Childhood obesity is a major problem in the United States. There are multiple reasons for this problem including the child’s school system‚ the access to technology in young children and the child’s genes. It is sometimes inevitable for a child to be obese due to their genes. There are some precautions being made to help this problem. Some might work but others might fail. Childhood obesity
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Paper 2-Explanatory Synthesis Obesity and the overall public health are becoming increasingly large problems America. Many people are split on ideas as to what is causing this health crisis. “Don’t Blame the Eater” by David Zinczenko‚ and “What You Eat Is Your Business” by Radley Balko are two essays that discuss problems with the current system as well as potential solutions to these problems. While Zinczenko argues that the problem is coming from a lack of information on the products being consumed
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Synthesis of Acetaminophen Lab Report Bijal Patel‚ 20467049 Partner: Poojan Parikh T.A.’s: Long Pu CHEM 123L‚ Section: 006‚ Rm: ESC 149 Tuesday February 4‚ 2013‚ 2:30pm-5:20pm Experiment Done: Tuesday January 22‚ 2013 Introduction Acetaminophen was first introduced in 1955 (Richman‚ 2004). It is an over-the-counter drug that relieves pain and reduced fevers. Acetaminophen is considered an alternate to aspirin since it does not irritate the stomach (Richman‚ 2004). It also has very
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Amani Sanders Moore Eng111 April 28‚ 2017 Argument Synthesis Walking through the mall you see plenty of heads down‚ hands to ears‚ and even sometimes earbuds and or headphones. Today technology and modern day entertainment are hiding the importance of communication. Texting is one of the main reasons we don’t communicate with our teenagers‚ texting degrades the value of a conversations killing emotion or feelings. “Technology negatively affects us by perpetuating the mindset of immediate satisfaction
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