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    DESCRIPTIVE TITLE The Effect of Different Amounts of Sodium Chloride on the displacement of oxygen. INTRODUCTION The dependability of the rate of an enzyme-mediated reaction is based on two factors: the substrate concentration and the concentration and action of the enzyme that catalyzes the reaction (Vander, et. al., 2001). Enzymes are catalysts that produce chemical reactions in cells. Enzymes which are large proteins perform a reaction which acts upon a substance known as a substrate. When

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    H2O every time I lower the concentration of sodium thiosulphate by 10cm3. I will observe the 8 experiments repeated 3 times each. Each experiment I will have different amounts of concentration of sodium thiosulphate starting with 90cm3 and I will keep a constant amount of HCL of 10cm3 and I will also add different amounts of H2O starting with 10cm3 and increasing as the concentration of sodium thiosulphate decreases. How am I going to make it a fair test I will use a clean flask for every

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    sodium thiosulphate, this is done by adding water to the solution. As I change the amount of water I put into the solution the concentration of it is changing. The more water that is put into the solution the weaker the concentration will become. To get my preliminary results I set up the experiment as above in the diagram section, and you use different amounts of the solutions. Use a burette to measure the amounts of the solutions needed, and put them into separate beakers. Using a funnel at

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    Amount of Sugar in a Potato When you submerge a plant cell in water, water flows through the cell wall and cell surface area into the vacuole from the outside. As a result, the cell swells up, but does not burst. This is because the cell wall stops the cell expanding too much. When this point is reached we say that the cell is fully turgid. This type of diffusion is called osmosis, and takes place through a partially permeable membrane. The water moves from a dilute solution to a concentrated

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    PC or Mainframe

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    Executive Statement A mainframe is a very large, powerful, dedicated, multi-tasking computer where enormous amounts of data are processed, sometimes millions of records a day. The mainframe is set up for specific applications and those applications only; which is totally different from a Personal Computer (PC). A mainframe runs a custom operating system specifically written for particular applications while a PC has a generic operating system such as Windows and is built to handle many different

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    Food and Sports

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    are essential to all body systems. The six classes are water, minerals, vitamins, proteins, fats, and carbohydrates. Most anyone, who swallows food throughout the day, has these kinds of nutrients; however, most people ingest them in the wrong amounts or with excess food that is useless. Water is the most important of all the nutrients. An athlete depends on water. Water is necessary for all energy production in the body, temperature control, and elimination of the by-products of respiration

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    the newspaper beneath the flask can no longer be read. Both the Sodium Thiosulphate and the Hydrochloric acid are soluble in water, so the concentration of either can be changed. However I am going to use varying amounts of Sodium Thiosulphate acid and H2O but I will keep the amount of Hydrochloric Acid constant. This is difficult factor to investigate as the readings are recorded by human reactions, which could differ due to the inevitabilities of a human error. According to the collision

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    Pcr And Its Use

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    Often times, scientists only have a small amount of DNA to deal with when doing genetic research or studies. In these situations, scientists can do one of several things. One is to just try to work with it anyway, but this is nearly impossible (depending on how much there is). Ther are a couple other processes they can use, or they can use PCR. PCR is one of the more complicated, but reliable ways to do tests on DNA when they only have a small amount to begin with. PCR, or Polymearse Chain Reaction

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    that the experiment is fair and that different cans may be of different thicknesses so allowing different amounts of heat through. I will keep the amount of water that I put inside the tin can, the same for each experiment to be fair. I will decide on this amount from my preliminary experiment. The time for each experiment will also be kept the same to ensure the water has had equal amounts of time for it to heat up, again I will decide on the time from my preliminary experiment. The independent

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    before this I carried out a trail experiment to see which solution, Sodium Thiosulphate or Hydrochloric acid would be more suitable. My Trail Experiment Method was to first collect all of the equipment needed, then I measured out the right amounts of each solution by measuring from the bottom of the meniscus. Then I put the solutions into a conical flask and timed how long it took for the paper cross underneath the flask to disappear. I tested both solutions by changing the concentration

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