Most materials move by simple diffusion from high concentration to low concentration. Some substances may be actively transported‚ which requires energy. The diffusion of water across a semi-permeable membrane is called osmosis. Osmosis is the net movement of molecules through a semi-permeable [1] membrane from an area of low solute concentration to an area with a high solute concentration. In this investigation‚ we are testing how concentration effects the rate of osmosis Hypothesis: The more
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Germ Line Control of female Sex Determination in Zebrafish In order to identify the sex of a developing embryo‚ many scientists have studied this process called sex determination that allows them to have better understandings on how sex is being determined in either vertebrates or invertebrates. Sex determination is normally determined genetically; however‚ other factors can contribute to its determination. There are numerous determinants that control sex determination‚ but the most important are sex
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Memory Test Outcomes: Differences? Naïve and Non-Naive participants using Levels of Processing Test Abstract 90words Introductions 450 Many researchers have tried to unravel the mystery of memory in the brain. Early popular theorist Atkinson and Shiffrin (1968) proposed that memories are kept in the brain in “stores” or rather locations where the information is held. They suggest that new information detected from the environment enters to the sensory memory. If attention is paid
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The effect of enzyme concentration‚ substrate concentration‚ pH‚ and temperature on the enzyme catalase. Introduction: Enzymes are biological catalysts; proteins and RNA. They are required for most biological reactions and they are highly specific. Each enzyme has an active site. The active site is the spot on the enzyme where a substrate fits in. Substrates binds with enzymes through the active site. Enzymes‚ being highly specific‚ only fit with one certain substrate. Enzymes and substrates
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The Dreaded Story of Dachau A concentration camp refers to a camp or closed area where people are detained under brutal conditions usually having no access to legal rights of arrest and imprisonment that would normally be accepted in a democracy. Concentration camps played a large part in the mass killing of Jews in Europe lead by Adolf Hitler. An example of a concentration camp is Dachau. During the World War II‚ Jews were separated into two groups the healthy and the unhealthy. The unhealthy
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the best combination of foods that would provide the essential amino acids of a complete protein. Rice and Black Beans 13. In the Vegan diet there is a concern the individual may suffer from Vitamin B-12 deficiency. What precaution could be made in order to avoid this problem? Take a Vitamin Supplement 14. With Todd’s diet how will it lower his chance of having CVD? The diet is low in saturated fats 15. What food choice provides Todd with the best source of
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protein concentration of an unknown sample of BSA‚ and by using the standard curve. Abstract A spectrophotometer’s purpose is to use colors of the light spectrum to determine the concentration of light absorbing molecules in a solution. (p.59) In this particular lab‚ our mission was to determine the protein concentration and the standard curve of the unknown sample of BSA. This‚ by preparing five dilutions of the unknown solution of BSA together with other known concentrations‚ and then
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Determination of Sulfate by Gravimetry Jose Luis E. De Guzman University of Santo Tomas‚ Sampaloc‚ Manila The determination of the percentage of sulfate in a sample is done as an instrument of learning a quantitative method of analysis‚ i.e.‚ of the gravimetric analysis. This type of analysis‚ which makes use of the weight of the samples was used for the experiment and required the precipitation of our analyte‚ SO4-2‚ and its filtration as a BaSO4 precipitate so as for weighing it. The weight
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The worst thing about the Holocaust was the concentration camps‚ and the propaganda that was made to be used against the Jews. The concentration camps were brutal and the Nazis treated the prisoners inhumanly and with no respect. There were four different types of camps during The Holocaust; Concentration Camps‚ Transit Camps‚ Work/Labor Camps‚ and Extermination Camps. Although they were not useful all of the camps had their own purpose. The Concentration camps are a place where people are kept or
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Experiment 5 Gravimetric Determination of Sulfate Eisman E. Morales TA: Jackeline Pennywiit Chemistry 121 02/14/2011 Purpose: To determine the percent sulfate in a sample using a semimicro scale gravimetric procedure. Procedure: Refer to pages 41-42 of General Chemistry volume 1 Laboratory Experiments by Judith Casey and Robert Tatz‚ Hayden McNeil Publishing‚ 2010 Report Sheet See attached report sheet. Report Questions 1. Explain how your calculated value for percent
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