sucrase was used as a control? Denatured sucrase was used as a control because it increases the activity. 3. Alkaline DNS denatures sucrase. Explain why it is important to denature the enzyme? Denaturing the enzyme is important because leaving it active will increase the activity of the enzyme. 1. State the optimum pH for sucrase activity and how sucrase activity changes at more acidic and alkaline pH values. 2. State the optimum temperature for sucrase activity and how sucrase activity changes at lower
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modern version the electrolyte is ammonium chloride paste (DK Science 150). Ordinary dry cells are used in most flashlight batteries. These dry cells use ammonium chloride as the electrolyte. "Cells needed to supply heavier currents use zinc chloride. Alkaline cells‚ which last longer and can supply even heavier currents‚ use the alkali potassium hydroxide" (DK Science 150). Most flashlights take two or more dry cells. Cells are connected in series one after another. Large powerful flashlights may take
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Monica Mahmoudi 02072798 Bandaruk Mon-Wed 12:45 PH Balance in the Human Body As we all know every solution is either acid or alkaline. Alkaline is often called base. These solutions can be anything from body fluids‚ to fruits‚ vegetables‚ seawater‚ beverages you name it. Acid and alkaline is measured in pH. It starts as low as zero being very acidic and works its way up to fourteen being the most basic. The pH of our stomach is 2‚ obviously to digest food‚ wine is 3.5‚water is 7(neutral)‚ arterial
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50/2=V V=25 cm3 Volume needed to neutralise 50 cm3 of 1 mol dm-3 of NaOH is 25 cm3 of HCL b) Independent variable: Volume of HCL Dependent variable: Temperature of mixed solution Controlled variables: Volume of alkaline‚ Concentration of acid‚ Concentration of alkaline c) Burette d)Fix the burette into a burette holder securely. Pour HCL into the burette with a funnel until it reaches the 0.0cm3 mark. e)The risk of using plastic cup in this experiment is that the plastic material
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ACID RAIN name here Engineering 303i Professor h May 3‚ 2004 BIBLIOGRAPHY Penguin Publishing House‚ 1987 ‚ Pearce Fred Acid Rain. What is it and what is it doing to us? New York Publishers‚ 1989‚ William Stone Acid Rain. Fiend or Foe? Lucent books‚ Inc. 1990‚ Steward Gail Acid Rain. Acid Rain Acid rain is a great problem in our world. It causes fish and plants to die because earth’s rainwaters are contaminated. It also causes harm to people as well‚ because
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• Biuret Test is a chemical test used to show/detect the presence of peptide bonds‚ which are the basis for the formation of proteins. Explanation In the presence of peptides‚ copper (II) ion forms a violet-colored coordination complexes in an alkaline solution. This test can be used to asses the concentration of protein because peptide bonds occur with the same frequency per amino acid in the peptide. According to Beer-Lambert Law‚ the intensity of the color and hence the absorption at 540 nm
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It is an important first step in sealing the driveway‚ penetrating the surface to get rid of mildew‚ pine sap and dirt stains and allowing for a strong bond to the new sealer. 2. Alkaline degreaser * These are effective in cleaning oil spots and other greasy dirt and stains because the alkaline is a base‚ which is the opposite of an acid on the pH scale with similar effects to acid on certain things. 3. Oxalic acid cleaners * These types of cleaners are effective for removing
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indicators‚ like the main type universal indicator. Then the red cabbage indicator and the litmus paper. Litmus paper indicator solution turns red in acidic solutions‚ blue in alkaline solutions‚ and it turns purple in neutral solutions. Unlike litmus‚ universal indicators can show us exactly how strong the acid and alkaline solutions are. To use the red cabbage indicator‚ grind the red cabbage indicator until it turns out to be a purple colored juice. The purple colored juice turns red when it is
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First of all‚ dendritic cells are isolated from the prostate cancer patient. The specific tumor antigen is then isolated‚ which in this case is the prostatic acid phosphatase (PAP). The dendritic cells are then exposed in vitro to a fusion protein that is consistent of PAP and GM-CSF‚ which is a cytokine important in the activation and proliferation of these dendritic cells. The activated APCs are then reinfused into
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pH is the comparative measure of hydrogen and hydroxide ions present. At neutral pH 7‚ there are equal numbers of hydrogen and hydroxide ions. A soil pH measurement below 7 is considered acidic and contains more hydrogen ions. Soil pH above 7 is alkaline and contains more negatively charged hydroxide ions. The soil pH is an important number to know because it determines the availability of almost all essential plant nutrients. If the soil pH is not on track‚ plants will not have access to nutrients
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