Jenna Gunselman 12/1/2011 Biochemistry Extra Credit Paper Estrogen and Its Effects Estrogens are steroids that are important in the reproductive cycles of humans and some animals‚ and they are the main female sex hormones. They easily diffuse across cell membranes‚ and once they are inside‚ they bind to estrogen receptors to control many genes and their expressions. In human women‚ there are three types of estrogen: estradiol‚ which is the dominant form of estrogen in women who are not pregnant
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was found in 1958 by (REF). However it was not until quite recently that it began to be used as it is today; as a cure for insomnia(Zhdanova). It is known that Melatonin causes many adverse effects such as headaches‚ dizziness and nausea Many research has been done on the correlation between age and the effect of Melatonin. In some countries‚ Melatonin can be bought without prescription and therefore it is possible for children to intake in large doses. However‚ (Arendt) has shown that it may affect
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try to find out its probable causes and effects with particular reference to Akatta‚ a town in Oru-East local government area of Imo state. It is the view of the researcher that early marriage continues to increase daily in spite of the awareness being created by governmental and non-governmental agents over the dangers of early marriage which posses problem to the entire society. The researcher believes that it is relevant to study the major causes and effects of early marriage in order to enlighten
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Leverage effect and tax effect. - dividends effectively are ongoing and stronger commitment compared with share buyback‚ because‚ according to Lintner managers prefer to increase dividend rather than decreasing them. On the other hand‚ share buyback does not commit the company to future pay-out. In other words‚ repurchasing reserves financial flexibility relative to dividend. In fact‚ the study of …‚ company with higher operating cashflow are likely to increase dividend‚ while company with higher
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(http://explorable.com/hawthorne-effect) The Hawthorne Effect is a well-documented phenomenon that affects many research experiments in social sciences. It is the process where human subjects of an experiment change their behavior‚ simply because they are being studied. This is one of the hardest inbuilt biases to eliminate or factor into the design. The History of the Hawthorne Effect The name is not the surname of a researcher‚ but the name of a place where the effect was first encountered. In 1955
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diffusion of water molecules across a selectively permeable membrane involves a special form of diffusion called osmosis. When the external and internal solute concentration are equal‚ there is no movement of water will be observed. This is described as isotonic. Osmosis does not occur in an isotonic solution‚ because the concentrations are equal on both sides of the membrane and there is no net movement of molecules from one side of the membrane to the other (Payne‚ 2007). A hypotonic solution is a
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ways to increase the reaction rate: increase temperature‚ add a catalyst‚ increase surface area‚ and increase the concentration of reactants. The objective of this lab was to experimentally show how temperature and surface area impact the rate of reaction‚ so only two of these methods were tested. The evidence indicates that increasing surface area increases the reaction rate‚ and increasing temperature also increases the reaction rate. Temperature is the measure of the average kinetic energy of
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What Are The Major Components of Biological Membranes And How Do They Contribute To Membrane Function?. Summary. The role of the biological membrane has proved to be vital in countless mechanisms necessary to a cells survival. The phospholipid bilayer performs the simpler functions such as compartmentation‚ protection and osmoregulation. The proteins perform a wider range of functions such as extracellular interactions and metabolic processes. The carbohydrates are found in conjunction
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important for our nature such as for ecosystem balance‚ earth temperature and flora and fauna habitat. In our country Malaysia‚ most of the forest are announced as a forest reserve to preserve our forest from destroyed. Not only important to flora and fauna but also to people. For some people‚ their lives depends on forest. However‚ deforestation activity by irresponsible people has led to imbalanced ecosystem. First of all‚ the effect of deforestation is pollution especially water pollution. This
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and what effect will this have on the raisin at different sucrose concentrations? Hypothesis The raisin in the beaker with most diluted sucrose solution will gain the most mass‚ therefore the control (0% sucrose solution) should be the most successful (in relation to the aim.) Background Information / theory Osmosis may occur when there is a partially permeable membrane‚ such as a cell membrane. When a cell is submerged in water‚ the water molecules pass through the cell membrane from an
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