Aim : To study the effect of lipid solubility of molecules on permeability of plasma membrane of animal cell. Introduction : Diffusion: In general‚ diffusion process occur when there is a concentration gradient between two region .Molecules (other than water) will move by diffusion as long as there is a concentration gradient. A concentration gradient exists when a particular type of molecule (like food coloring dye molecules) is not spread out in an even concentration‚ but exists in a higher
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when in fact it seems that synaptic strength‚ or plasticity‚ is more vulnerable to the process of ageing (1). Biochemical and structural alterations of the synapse such as changes in lipid composition in certain areas of the brain are also thought to be associated with this deterioration (2‚ 3‚ 4). In this paper‚ the lipid of concern is the versatile phosphatidylinositol 4‚5-bisphosphate (PIP2)‚ which is important for signalling proteins‚ generation of secondary messengers that go on to regulate other
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The Biological Importance of Lipids Lipids are organic compounds found in all types of plant and animal cells. They always contain carbon‚ hydrogen and oxygen‚ however the relative amount of oxygen is less than the amount of carbohydrates in lipids. Lipids are polymers and the long chains of repeating units are joined together in a condensation reaction where water is also produced. The most common types of lipids are triglycerides‚ phospholipids and waxes. Triglycerides are formed by three fatty
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1-29-12 Intro to Psychology Morgan Herda 1. Jack is a second-grade student. He seems to have no interest in learning‚ often daydreaming in class and frequently disrupting the class by throwing objects at other students. Describe how a biopsychosocial approach might provide both an integrated explanation of Jack’s classroom behavior and practical suggestions for helping Jack to cope more effectively with the challenges he faces. Jack is in second grade and is having a hard time behaving
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How does the relationship between salt concentration effect osmosis in the aquatic plant Elodea? Quantitative data From observing the cells under a microscope‚ we see that they are continuously moving and therefore are alive. We have observed that when the cells are in the 10% sodium chloride‚ the chloroplasts are positioned to the sides of the cell wall and the cytoplasm is more expanded. Cells in the distilled water are slightly smaller than the cells in the sodium chloride solution and
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Chou‚ P. (2007). The effects of background music on the reading performance of taiwanese esl students. New York: Self Published. Retrieved from http://books.google.com/books?id=zVz_Lv9OnN0C&pg=PA33&lpg=PA33&dq=effects of background music on concentration&source=bl&ots=xRZ4pvia4r&sig=lzJhKQmZfw7WXV-WD1hyJhT9I4A&hl=en&sa=X&ei=I3otUeKHBo_o8gSBooHYAw&ved=0CH8Q6AEwCQ * Hallman‚ Price‚ Katsarou‚ S. J. G. (2002‚ November 2).The effects of background music on
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EFFECT OF TEMPERATURE‚PH AND SUBSTRATE CONCENTRATION ON ENZYME ACTIVITY | Aim To investigate the effect of Temperature‚Ph and substrate concentration on the rate of enzyme activity. Hypothesis
Free Enzyme Hydrogen peroxide Catalase
The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The percent fat in a food will be determined by extraction of the fat and weighing it. Introduction Lipids‚ by definition‚ are natural substances that do not mix with water but dissolve in organic solvents. There are several classes of lipids‚ including: fatty acids‚ waxes‚ triacylglycerols
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example the presence of salt greatly enhances the rusting of metals. This is due to the fact that the dissolved salt increases the conductivity of the aqueous solution formed at the surface of the metal and enhances the rate of electrochemical corrosion. This is one reason why iron or steel tend to corrode much more quickly when exposed to salt (such as that used to melt snow or ice on roads) or moist salty air near the ocean. [pic] salt will speed up rusting. The more salt you
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Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina IB Chemistry SL 11 Mr. Eastwood Analyzing the effects of varying hydrogen peroxide (H2O2) concentrations on the volume of its drop Jonah Jemina Introduction: Hydrogen peroxide is a clear and colourless substance that has a strong oxidizing characteristic. From the books‚ “Hydrogen Peroxide: Medical Miracle”[1995] by Douglass and “Applications of hydrogen
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