undergo chemical reaction. Enzymes greatly speed up the rate of biological reactions by lowering the energy of activation. To get a sense of the speed and efficiency of enzymes‚ substrates can be transformed to products at the rate of thousands of times per second with the enzymes. If we consider the total number of different enzymes in the human body‚ which is estimated to be around 75‚000‚ these chemical reactions are performed at an amazing rate. On the other hand‚ in the absence of enzymes‚ reactants
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rock are removed from the Earth’s surface by natural processes such as wind or water flow‚ and then transported and deposited in other locations. While erosion is a natural process‚ human activities have dramatically increased (by 10-40 times) the rate at which erosion is occurring globally. Excessive erosion causes problems such as desertification‚ decreases in agricultural productivity due to land degradation‚ sedimentation of waterways‚ and ecological collapse due to loss of the nutrient rich
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Once Upon a Time by Gabriel OkaraOnce upon a time‚ son‚they used to laugh with their heartsand laugh with their eyes:but now they only laugh with their teeth‚while their ice-block-cold eyessearch behind my shadow.There was a time indeedthey used to shake hands with their hearts:but that’s gone‚ son.Now they shake hands without heartswhile their left hands searchmy empty pockets.‘Feel at home!’ ‘Come again’:they say‚ and when I comeagain and feelat home‚ once‚ twice‚there will be no thrice-for then
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Conflicting Claims About the Effect of Exercise on the Rate of Clothespin Squeezing * Hypothesis: If a person does not exercise before to squeeze a clothespin‚ then they will be able to squeeze the clothespin more times in a minute than if they do exercise first. Without exercise the person will have more energy to squeeze the clothespin more times than the other who exercises first and might get tired more rapidly. * Materials: * Clothespin * Stop watch * Pen or Pencil
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Unit 3. Assignment 1: Bacterial Growth Rates 1. Mediums that could be used to determine shigellosis include Btilliant Green Agar‚ and Triple Sugar-Iron Agar. Expected results in a confirmed case of shigellosis are as follows: Brilliant Green Agar – Isolated Shigella colonies which do not ferment lactose or sucrose and appear red or white in color with no growth to trace growth on the Agar plate will be present. Triple Sugar-Iron Agar – Presence of Shigella will manifest as a red slant with
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The Effect of Caffeine on Heart Rate Caffeine is made by plants as a way of getting rid of insects. Cocoa is produced in South America‚ coffee in Africa and tea is produced in Asia have all been used for a very long time to give us a little rush in order to keep us going. Now caffeine is also used as a flavour enhancer in cola and other soft drinks also it has medicinal uses in aspirin preparations and is found in weight-loss drugs and as a stimulant in normal people in everyday to
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Determination of a Rate Law and Temperature Dependence of a Rate Constant By Marvin Coleman March 7‚ 2011 Abstract: From the shown calculations & graphical analysis‚ the experimentally determined rate law is rate = K[I-].969 [H2O2].991 and the experimentally determined activation energy is 59.50 kJ/mole. Introduction: The rate of a reaction varies at different temperatures and reactant concentrations. In this experiment‚ the orders and dependence of the rate constant of the products
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To begin the analysis‚ the properties of the air at the base of the tower were examined. The wet and dry bulb temperatures of the air at the inlet were used to find the humidity‚ humid volume‚ and enthalpy of dry air. For example‚ in the first trial the dry bulb temperature was 22.5⁰C and the wet bulb was 16.5⁰C‚ and the properties found from the psychrometric chart are listed below. H_bottom=0.0095 kg/(kg dry air) V_bottom=0.85 m^3/(kg dry air) h_bottom=47 kg/(kg dry air) Then‚ the cross-sectional
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Determination of the Rate Constant for a Chemical Reaction Department of Chemistry Abstract This experiment was performed to determine the rate constant k‚ for hydrolysis of tertiary butyl chloride to tertiary butanol. The solvent system for this reaction is 45% isopropyl alcohol and 55% water. The rate of hydrolysis of t-butyl chloride is measured by the decrease in the concentration of this reagent with time. The rate of decomposition of t-butyl chloride must be equal to the rate of formation
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A STUDY ABOUT THE EFFECT OF INFLATION‚ EXCHANGE RATE‚ INTEREST RATE AND COMMODITY PRICE TOWARDS BALANCE OF PAYMENT IN MALAYSIA AHMAD SUFIAN BIN ABDULLAH 2012422116 BACHELOR OF BUSINESS ADMINISTRATION (HONS) FINANCE FACULTY OF BUSINESS MANAGEMENT UNIVERSITI TEKNOLOGI MARA MERBOK‚ KEDAH MARCH 2014 A STUDY ABOUT THE EFFECT OF INFLATION‚ EXCHANGE RATE‚ INTEREST RATE AND COMMODITY PRICE TOWARDS BALANCE OF PAYMENT IN MALAYSIA AHMAD SUFIAN BIN ABDULLAH 2012422116 Submitted
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