Date: 9-10-13 Title: HPLC analysis of Caffeine Lab Partners: Objectives: 1) The main objective of this lab is to gain experience in using and reading results from the HPLC machine. 2) The first step is to inject a series of caffeine standards into the machine in order to get results/values of peak height and area. 3) The next step is to investigate the effects of a series of HPLC parameters on Retention time‚ peak height and peak area. 4) To use above data from peak height and area
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Excessive alcohol intake has a great impact on the cognitive function of a person. It leads to a person to have a poor cognitive function. Which can be affected the persons perception‚ attention‚ memory‚ motor skills‚ language‚ visual and spatial processing. To some extent‚ study indicates that high level of impulsivity in alcohol consumptions of a person has an effect on the frontal lobe related to their behavioral problem (Lyvers et.al.). Furthermore‚ alcohol intoxication causes disruption of prefrontal
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Running head: The Effects of Parental Abuse The Effects of Parental Abuse of Alcohol on Children of Alcoholics Abstract An estimated 6.6 million children under the age of 18 are living with an alcohol dependent parent. These children are often subjected to a disheveled life style which affects them mentally‚ emotionally and physically. Researchers have examined the many ways in which this disease impacts children’s lives and if the
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parties‚ sports activities and friends. The result is that young people suffer from stress. There are different ways of dealing with stress. Everyone knows that caffeine‚ whether it is in the form of coffee or soft drinks‚ keeps you awake and alert. But caffeine is a drug which can become addictive. In the end‚ like other drugs. caffeine only leads to more stress. A better way to deal with stress is to exercise: Research has proved that physical exercise is a good release for stress‚ because it increases
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concentration of caffeine bulbs B‚ C‚ and D were in: 0.1%‚ 0.3%‚ and 0.5%. Four test tubes were gathered to set up the experiment‚ each holding an onion bulb. After each day‚ every individual bulb’s roots were counted and the average length was recorded. After recording this information for six days‚ an onion root tip from each bulb was taken and squashed under a coverslip. These root tips were then looked at under a microscope.
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Alcohol Consumption and the College Student – The Causes and Effects December 24‚ 2011 Table of Contents List of Illustrations 3 EXECUTIVE SUMMARY 4 1.0. INTRODUCTION 5 1.1. Purpose Statement 5 1.2 Problem 5 2.0 DISCUSSION 7 2.1 Factors That Contribute To The Problem 7 2.2.1 Solutions Proven Most Effective Through Documented Scientific Research 8 2.2.2 Solutions Proven Least Effective Through Documented Scientific Research 10 2.2.3 Solutions Needing More Research
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the experimental hypothesis was accepted. These findings could be due to the negative phototactic response that occurs when they are exposed to visible light that are above 600 Mn (nanometers) that are also considered the color red. This shows that Daphnia have a greater phototactic reaction to red light than when exposed to white light. When compared to a similar study‚ the same result was found. It was reported that there was a significant difference in the Daphnia’s phototactic reaction when exposed
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Topic:Should the minimum legal age for drinking alcohol raised from 18 to 21 in Australia Name:Michael Student #: Thesis statement:The minimum legal age for drinking alcohol should be raised from 18 to 21 in Australia Paragraph 1 1st Topic Sentence:Increasing drinking age makes our society safer 1st Supporting Idea:drunk drive causes many accidents Evidence:new drivers--poor skills--easy to be killed- 3.65 drivers and 0.77 additional people died 2nd Supporting
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1. Do you agree with the FDA that nicotine can be classified as a drug and that cigarettes can be classified as devices under the definitions in the Food‚ Drug and Cosmetics Act? I agree that nicotine can be classified as a drug because it falls into the categories of the three clauses (A)‚ (B)‚ (C) and (D) under the definitions in the Food‚ Drug and Cosmetics Act: - It is article recognized in the official U.S Pharmacopoeia (Clause A) - It is article that intended for use in the diagnosis
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EXTRACTION OF CAFFEINE FROM TEA LEAVES ABSTRACT Caffeine extraction from the commercial tea leaves (Lipton Yellow Label Tea) that was done is multiple extraction. 4 tea bags were used in the experiment; tea leaves were weighed having 8.5333 grams. The leaves were boiled in a beaker with 150ml of water; the aqueous tea extract was transferred in a seperatory funnel mixed with DCM (20ml)‚ done thrice. The DCM layer was washed with 20ml 6M NaOH in the seperatory funnel; the organic layer
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