THE EFFECT OF pH LEVEL ON CORROSION RATE A Long Laboratory Report Presented To; The Department of Chemical Engineering BY
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OBJECTIVE: The experiment was carried out to investigate the effects of the increase in the enzyme concentration on the rate of reaction. By using self investigative and experimental skills‚ the experiment was done in order to determine how the rate of reaction will be altered‚ whether it will increase‚ decrease or remain constant when the different concentration of enzymes added. INTRODUCTION: Enzymes are produced naturally in plant‚ animal‚ and microbial cell. There are thousands of different
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Investigation: The Stanford prison experiment was originally intended to run for a fortnight. However it lasted only 6 days and was ended earlier than initially planned due to the terrible living conditions and psychological problems that developed as the ‘inmates’ and ‘guards’ interacted.. The experiment was run by Philip Zimbardo‚ Craig Haney‚ David Jaffe‚ and W. Curtis Banks. The test subjects were young male college students that were chosen from 75 volunteers. The volunteers had replied to
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dilation of blood vessels decreases the amount of venous return to the heart. Also‚ this increased diameter of blood vessels and increased volume allows for less of the blood to come in contact with the walls of the vessels. So a larger volume of blood is allowed to pass through a vessel without obstruction‚ characterizing a decrease in peripheral resistance. This increased blood flow is explained by an immediate increase in heart rate‚ which is what allows for more blood to pass through the vessels.
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Method I generally followed most of my plan for the experiments‚ but to improve accuracy and reliability‚ I made one change. In my plan‚ I said that I was going to use 20cm³ of starch for each experiment. However‚ in my actual experiment I used 40cm³ of starch. This is because I thought I might not have had enough solution if I only used 20cm³ of starch. If this was the case‚ then I would have to stop the experiment half way through‚ which would have prevented me from obtaining accurate results
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Introduction In this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another. We
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Diving and Heart Rate Prelab Questions: 1.) If the peripheral blood vessels were constricted without making any other further adjustments in the cardiovascular system then the blood vessels could potentially burst due to the built up pressure and no further decrease in heart rate. The vessels would be smaller due to the constriction but the heart would continue to pump the blood with the same or greater force. The dive response prevents this from happening because it lowers the heart rate so that
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Article: “Faster but not smarter: effects of caffeine and caffeine withdrawal on alertness and performance Journal: Psychopharmacology Publication Date: 30 October 2012 Is Caffeine Helping or Hindering Your Performance? Have you ever drunk coffee just for the taste? Studies show that that might be just what you’re doing when you take a sip of that bitter beverage. Whether you’re in high school and didn’t get enough sleep between sports and academics‚ you’re in college and finals are around the
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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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Caffeine and Sleep • Sleep Topics Caffeine has been called the most popular drug in the world. It is found naturally in over 60 plants including the coffee bean‚ tea leaf‚ kola nut and cacao pod. All over the world people consume caffeine on a daily basis in coffee‚ tea‚ cocoa‚ chocolate‚ some soft drinks‚ and some drugs. Because caffeine is a stimulant‚ most people use it after waking up in the morning or to remain alert during the day. While it is important to note that caffeine cannot
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