The effect of alcohol concentration on the cell membrane Abstract: In this experiment I found out that as the concentration of the alcohol was increased so did the colour intensity of the solution. This is because the higher concentration of ethanol‚ results in more damage done to the cell membrane‚ resulting in leakage of red pigment from the cell. If the membrane is damaged more‚ more red pigment will leak out of the membrane and into the ethanol. Hypothesis: The higher the concentration
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of the consequences of excessive drinking. After connecting with her‚ I wanted to know if alcohol concentration in spirits would affect the cells in the body. Thus‚ I decided to test my theory by adapting a class beetroot experiment to my investigation. The aim of this experiment is to investigate the effect of alcohol concentration on a biotic cell membrane. The human body cannot live long with damaged cells because they are the building blocks of life. Cell membranes are phospholipid bilayers meaning
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A-LEVEL BIOLOGY LAB REPORT NAME: NURUL AYUNI BT SABRI GROUP: 11SC4 TITLE: THE EFFECT OF CAFFEINE ON HEART RATE LECTURER : MDM ZAKIAH BINTI ZAKARIA TITLE The effect of caffeine on heart rate OBJECTIVE To determine the effect of caffeine on heart rate of daphnia INTRODUCTION Caffeine‚ medically known as trimethylzanthine. Its chemical formula is C8H10N4O2. When in pure form‚ caffeine is a white crystalline powder that taste very bitter. 1The most common way
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The Stanford Experiment of the 1970’s was a test of human nature conducted by the Stanford Psychology Department. A total of 24 students with no criminal or physiological health background were selected to be either guards or prisoners. The experiment was planned to last two weeks‚ but after only six days it had to be stopped for it was becoming too much to handle for everyone involved. The guards had disobeyed their instructions and began to physically abuse the prisoners‚ while the prisoners began
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commander. However this norm is not always acceptable‚ especially when the followers blindly obey the authority. Throughout this paper I will explore why people are so willing to accept orders particularly in dire situations and how this psychological phenomenon can be addressed in the modern day. Although many of us would agree not to commit crimes‚ Milgram’s experiment proves that humans are easily manipulated. At the beginning of the 1930’s‚ Adolf Hitler’s Nazi Party exploited the widespread discontent
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Copper sulphate experiment Introduction There are a number of different methods of making salts‚ such as the reaction of a metal with an acid. Copper metal‚ however‚ does not react with sulphuric acid and so another method must be used. In this experiment a basic copper compound (copper(II) oxide) will be reacted with sulphuric acid giving copper(II) sulphate as one of the products. Method 1. Wear goggles and keep your face away from the beaker during the reaction 2. Place 20 cmm3 sulphuric
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Progress Report Scaffold Which brand of paper towel is most absorbent? Aim: The aim of this experiment is to see which brand of paper towel absorbs the most water out of a 200mL beaker. Hypothesis: In this experiment my reasearch has shown that Kleenex Viva would be most likely to absorb the most water as to the amount that the Woolworths homebrand would because of its thickness and the texture of the paper. Variables: |Independent variable |The independent variable
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- Quasi Experimental Design: If the researcher lacks control over the assignment of participants to conditions and does not manipulate the causal variable of interest‚ the design is quasi experimental. o Quasi Experiments do not have internal validity because participants are not randomly assigned to conditions and the researcher may have no control over the independent variable. - Basic Confounds in Quasi Experimental Design are : o History o Maturation (Emotional‚ Physical & Psychological)
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Ashley Perez Biology 124 September 15‚ 2013 Discussion Paper In the experiment of Mr. Miller‚ I understand that he sealed in certain elements that stimulated the conditions that he thought were presented in the beginning of earth’s time and tested the chemicals that would be there a few days later. Miller predicted that prehistoric earth had certain chemical reactions that made organic compounds from inorganic base. The experiment used water‚ methane‚ ammonia‚ and hydrogen. The chemicals were
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The Milgram Experiment Stanley Milgram‚ a famous social psychologist‚ and student of Solomon Asch‚ conducted a controversial experiment in 1961‚ investigating obedience to authority (1974). The experiment was held to see if a subject would do something an authority figure tells them‚ even if it conflicts with their personal beliefs and morals. He even once said‚ "The social psychology of this century reveals a major lesson: often it is not so much the kind of person a man is as the kind of situation
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