The Effect of Different Molar Mass on the Diffusion on Substances Lunar-maius A. Gaerlan Group 2 Sec. X – 9l August 15‚ 2012 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test. The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue(C16H18N3SCl) were simultaneously introduced to each well. Methylene blue
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determine the combined effects of coloured lighting and ambient sound on mood. 48 psychology undergraduates‚ comprising of 38 females and ten males‚ took part in this study. This study is a 2x2 between subjects design. The coloured lightings used in this study are blue and yellow combined with the ambient sound of ‘city’ and ‘nature’ whereas mood was measured with the Positive and Negative Affect Schedule (PANAS). We discovered that coloured lighting had no significant effect on mood as opposed to
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The drug “dinitrophenol” (DNP) was prescribed by some physicians in the 1940’s to help patients lose weight. This unsafe method was abandoned after a few patients died. DNP uncouples the chemiosmotic machinery by making the lipid bilayer of the inner mitochondrial membrane leaky to H+. Explain how this could cause weight loss. In chemiosmosis‚ NADH are passed along the electron transport chain‚ with energy used to pump protons across the inner mitochondrial membrane. As the protons are transferred
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Meron Habtemichael Sugar: Is Sugar "Bad" for You? There is controversy about sugar and its heath issues. · Eating a lot of sugar means you will have to cut down on other forms of food. · Sugar causes malnutrition because it reduces the nutrition that one would receive from other foods. · Also if you consume sugar along with other food you eat regularly you will be taking in too many calories‚ thus bringing in the problem of obesity. · Once the body has enough sugar to fill its glycogen
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Photosynthesis and cellular respiration Introduction: Photosynthesis is the process which used by plants to capture light energy and use it to do chemical reactions that change carbon dioxide and water into oxygen and energy (ATP)‚ carbohydrates just like sugar. Cellular respiration is the process that releases energy by breaking down glucose and other food with oxygen. Plants cells do photosynthesis and cellular respiration both ‚but animal cells can only do the cellular respiration. In photosynthesis reaction
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The Sugar Interest‚ the wealthy British plantation owners‚ were one of the main causes of the start of the Revolutionary War. The Sugar Interest’s influence in British Parliament to give the Sugar Islands back to France was a factor. A second factor was the Sugar Interests desire for high profits and no competition. A third factor was the need to create revenue to provide funds to pay the debt incurred from the French and Indian War. The Sugar Interest had seen how the tobacco market had been
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process such as photosynthesis and cellular respiration. Photosynthesis uses the carbon dioxide that is in the atmosphere to transform it into sugar and oxygen; cellular respiration puts carbon dioxide in the air. Both of these processes were studied during the experiment. In the experiment‚ the tube with both the elodea and the snail had the same level of carbon dioxide in both the light and dark tube. This occurred because the snail performed cellular respiration‚ and the elodea performed both photosynthesis
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is to determine the effects acid and sugar in various amounts have on a cornstarch paste. The importance of this experiment is to examine what causes starch to thicken or thin which is relevant to obtaining the desired viscosity for recipes that involve starch cookery without complication. Factors to be considered in the thickening power of cornstarch include the concentration of starch‚ extent of gelatinization thus temperature and duration of heat‚ and the addition of sugar or salt (1). Background
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PHOTOSYNTHESIS & CELLUAR RESPIRATION LAB REPORT % Absorption 400 425 450 475 500 525 550 575 600 625 650 675 700 Average 47 44 37 27 14 10 8 9 9 10 15 17 14 Use the graph of Average % Absorption for Grass Pigments to answer the following questions. ANSWER ONLY THE QUESTIONS BELOW. YOU WILL LOSE POINTS IF YOUR ANSWER INCLUDES UNRELATED INFORMATION. 1. What specific range of wavelengths explains why grass is green? The absorption of all wavelengths outside approximately
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transport oxygen rich blood from the alveoli back to the heart. Inspiration (the process of inhaling) begins as the external intercostals and diaphragm contract. When this happens‚ the lungs expand. After this‚ negative pressure is used to facilitate respiration. So‚ air moves from an area of higher pressure‚ which is the air‚ to an area of lower pressure in the lungs and aveoli. During inspiration the diaphragm and intercostal muscles contract. The diaphragm moves downwards‚ while the intercostal muscles
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