Enzymes are naturally occurring biological catalysts that are extremely efficient and specific. Enzymes accelerate the rate of a reaction by factors of at least a million as compared to the same reaction without the enzyme. Most biological reaction rates are not perceivable in the absence of the enzyme. The term enzyme was first used by a German pshysiologist Wilhelm Kühne in 1897. There are over 700 different kinds of enzymes that have been identified. Enzymes can be classified into several categories
Free Catalysis Chemical reaction Chemical kinetics
CITRUS AURANTIUM PEELS IN POWDER FORM AND THE POSITIVE CONTROL FOOT POWDER AT THREE DIFFERENT MIXTURES AS FOOT ODOR AND SWEAT MINIMIZER” A Thesis Presented to the Faculty of Virgen Milagrosa Special Science High School In Partial Fulfillment of the Requirements In Science Research II By: Kathleen Mae S. Cancino November 2009 APPROVAL SHEET This thesis proposal entitled “Comparative Effects of Citrus aurantium Peels in powder form and the positive
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Proper Hand Washing Teachers and parents have been trying to instill the importance of hand washing in children for years. Do you remember being in elementary school and your teacher would take the whole class to the restroom before every meal to wash your hands‚ and you’d get angry because all you wanted to do was hurry down to the cafeteria and eat‚ you didn’t want to waist time washing your hands. Well washing your hands is one of the leading ways to prevent germs from spreading and making
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The Importance of Hand Washing and Health Marie Kramer Galen College of Nursing The Importance of Hand Washing and Health Something as simple as washing your hands can help prevent the infections of wounds‚ food poisoning‚ and the spread of deadly viruses such as the flu. According to the CDC website‚ it takes 20 seconds to effectively wash your hands. This is not only for your benefit‚ but for the benefit of others. First let us start with wound infections. Whether you are taking care of
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Factors which Affect the Activity of the Enzyme Catalase Purpose: Must include: background information about concepts involved in the lab‚ statement of purpose of the lab identification of independent and dependent variables. A hypothesis is often not necessary or appropriate. Enzymes are proteins that speed up chemical reactions in cells. They break down molecules called substrates. Each enzyme has only one substrate that it breaks down. Enzymes are produced in the cells of the body
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Specifications of stone powder mill： 1.High efficiency‚ large grinding ratio 2.Easy maintenance and operation 3.low investment—micro powder mill 4.long service life Features of stone powder mill in Shanghai clirik Machinery Co.‚ Ltd.: 1. High-efficiency and low consumption With the same end-products fineness and motor power‚ its output is over 1 time of that of Jet Mill‚ Mix Mill‚ and Ball Mill. 2. Easy-damaged parts with longer working life The grinding roll and ring are made
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Title: Enzyme Activity Aim: To investigate the activity of the enzyme catalase in liver and potatoes‚ and to investigate the effect of temperature‚ surface area‚ pH and certain chemicals on the activity of catalase. Equipment: Dilute hydrochloric acid solution x 1ml 10 volume hydrogen peroxide x 100ml Copper sulphate solution x 1ml Aluminum nitrate solution x 1ml Zinc nitrate solution x 1ml dilute NaOH solution x 1ml Mortar and pestle x 1 25ml Beaker x 1 Hot plate x1
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There are many reasons why enzymes have such a high specificity. The first variable is an enzyme’s primary structure. A primary structure is just a combination of amino acids. There are twenty different amino acids that the primary structure can be created from. Every enzyme has a different order that the acids are placed in and each one has a different number or amino acids. The slightest change in this structure can affect a protein’s conformation and function. The secondary structure is a regular
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My lab group studied the effect of PH on reaction rate/ enzyme activity measured by foam height. PH is the measure of the concentration of hydrogen ions in a solution. The higher the hydrogen ion concentration‚ the lower the pH. Every enzyme has an optimal PH‚ meaning they have a very small window in which they are most active. Our enzyme (potato smoothie) had an optimal PH of 7.0-7.5. We know this because we measured the enzyme’s reaction rate by measuring foam height. The largest foam height we
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Action of enzymes as catalysts in biochemical processes * Enzymes acts as catalyst and increase the rate of all the chemical reactions. * Enzymes are also described by two properties like all other catalysts. It composed of two main functions. * The first function is that‚ they increase the rate of chemical reactions by without consumed themselves or undergo any change or alteration in the reaction. . ( Zemitec et‚al 2008). * The second function is‚ they increase reaction rates
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