Practical: The Effect of Concentration on Reaction Rate Aim: To use a simple reaction between sodium thiosulphate and hydrochloric acid to discover concentration this determines how fast chemical reactions occur. Independent Variable: Concentration of hydrochloric acid (%) Dependent Variable: Time taken for chemical reaction to take place (sec) Hypothesis: My prediction is that the increased concentration of the thiosulfate will in turn lead to an increase in the rate of reaction. This
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Brooke Strowd AP Biology Ms. Butler 28 January 2013 I. Title: Effect of a Catalyst on Reaction Rate II. Introduction: The basis of the experiment is the enzyme; an enzyme is a biological molecule that acts as a highly selective catalyst. By combining with a substrate‚ an enzyme is able to create a new product that helps the body function. (Ex. Lactose/Lactase) A substrate is a molecule an enzyme acts upon‚ the two combine at an area called an active site. This active site allows induced fit
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initial rate of reaction. I will measure the effect of the enzyme in 5 different concentrations against the controlled variable of the reactant. The enzyme which will be used is different concentrations of potato and the reactant used will be Hydrogen Peroxide. Hydrogen Peroxide which will be the buffer solution is a PH of 7.2. My hypothesis for the experiment is that as the concentration of the enzyme is increased the rate of reaction will be increased‚ producing oxygen at a faster rate. The results
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EXERCISE 27 Functional Anatomy of the Endocrine Glands Gross Anatomy and Basic Function of the Endocrine Glands 1. Both the endocrine and nervous systems are major regulating systems of the body; however‚ the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain this comparison. The nervous system is a lot more fast acting and more rapid action occurs when compaired to the endocrine and the slow path through the blood stream
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Russia Exchange rate system Russia used to pledge its nominal exchange rate with some main currencies such as US dollar. However‚ the Russian crisis has forced Russia to develop managed floating exchange rate system‚ where the exchange rate driven by market forces of the Ruble’s demand and supply with the help of government intervention. With this exchange rate‚ the government can ensure stability and predictability of ruble exchange rate and prevent abrupt fluctuation of the Ruble rate. Moreover‚
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Student Name: Jessica Sousa Student Number: M00455072 Date: 15/11/2014 BMS2113 Molecular and Metabolic Biochemistry Module Leader: BeataBurczynska Practical Tutors: Dirk Wildeboer&BeataBurczynska Formative practical worksheet (three questions) Page limit: Cover sheet + 2 pages maximum By completing the coversheet‚ students acknowledge the following on the originality of their work: I confirm that this work is my own work; where I have rewritten someone else ’s ideas in my own words‚ I have
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In the face of rising inflationary pressure in Hong Kong‚ some people have suggested that the Linked Exchange Rate system is the root cause of the situation and that the Hong Kong dollar should no longer be linked to the US dollar. The Financial Secretary already stated in his blog on 14 August that the Link continues to be the most appropriate exchange rate arrangement for Hong Kong. I will elaborate further on a few related issues. Many people who advocate un-pegging the Hong Kong dollar from
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Functional Anatomy of the Endocrine Glands Gross Anatomy and Basic Function of the Endocrine Glands 1. Both the endocrine and nervous systems are major regulating systems of the body; however‚ the nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. Briefly explain this comparison. The nervous system employs electrochemical impulses to bring about rapid control‚ whereas the endo system is more slowly acting with hormones. Substance secreted
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through studies‚ different types of prevention methods such as hormone replacement therapy (HTR)‚ multivitamin‚ neuroprotectin supplementation. Revised paragraph Two authors‚ Zandi et. al and Pagaini-Hill‚ focus on Hormone Replacement Therapy as an effective preventive procedure to lessen the higher rate of AD in Women. According to Zandi et al.‚ basic neuroscience findings suggest that by replacing certain hormones through HTR (Hormone replacement therapy) as well as implementing minerals such as
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Breonna Mosely 7/17/2014 Dr. Ganser Endocrine system effects on Sleep Deprivation Deprived sleep is a universal widespread problem observed in both children and adults. Sleep is a vital process that helps in the functioning of learning‚ memory processing‚ cellular repair‚ and brain development. Statistics show that the average total hours of sleep have decreased per person to less than 7 hours per night over the past 3 to 4 decades. Many people experience sleep loss due pressures at work
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