mystery powder based on its physical and chemical properties. Hypothesis The physical properties of each powder can help identify what the mystery powder is‚ but the chemical properties will determine the answer. Safety * Wear safety glasses. * Do not taste any substance in this experiment * Iodine solution and some powders are hazardous. * Wash hands when you have finished. Materials * Eye protection * Well plate * 6 small toothpicks for stirring each powder *
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PREPARATION OF ALUMINA POWDERS 1. BAYERS PROCESS INTRODUCTION The Bayer Process was invented and patented in 1887 by Austrian scientist Karl Josef Bayer. Two to three tonnes of bauxite are required to produce one tonne of alumina. 90% of the global alumina supply of around 90 million tonnes is used in aluminium production. DEFINITION The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide). The aluminium oxide must be purified before it
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structure of the enzyme is mainly dependent on the active site and variable groups. Extreme temperatures or extreme pHs can alter the structure of an enzyme. Enzymes function to lower the activation energy to break the bonds. They achieve this by putting stress and pressure on the bonds or creating a microenvironment for the substrate. Enzymes are regulated by inhibitors or activators and can be inhibited by the products of the reaction‚ called feedback inhibition. Enzymes are catalytic proteins;
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on the rate of enzyme activity of Catalase Aim To investigate the effect of substrate concentration (manipulated by increasing concentration of hydrogen peroxide) on the rate of enzyme activity of catalase‚ produced by liver cells‚ on the decomposition of hydrogen peroxide. Introduction Enzymes are biological catalysts that increase the rates of reactions. In an enzyme-catalyzed reaction‚ the substrate binds to the active site and forms enzyme-substrate complex with the enzyme through the lock
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WASHING DETERGENTS Summary of Module 1 INDUSTRY OVERVIEW Washing powders and detergents are considered to be an important part of personal and home care product lines. The local detergent industry in Pakistan has flourished significantly over time and is still on the path diversification and development. During the periods of 1980s till the end of 90s‚ detergent bars had the major market share‚ in most of the market segments. The detergent powders through their extensive marketing campaigns
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humid surroundings perspire profusely and with the help of Face and Body powder‚ they are able to reduce the odor and keep their skin dry for a longer period of time. However‚ these products are mixed with ingredients which can be harmful to our skin in the long run. An example of these elements is magnesium silicate which can cause body tissue to constrict and create a dry surface. Additionally‚ commercial body and facial powder also has considerable amount of zinc stearate‚ which is a human irritant
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OBJECTIVE: The purpose of this experiment was to see which type of orange juice will have the most vitamin C to the point where it will change colors. HYPOTHESIS: Orange juices labeled A will have the most enzyme concentration because it looked thicker than the others. Therefore I thought it will need more Iodine whilst orange juice labeled B & C will need less Iodine because they looked lighter. Variables Independent: the amount of Iodine that was added to the the different types of orange juice
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day for your washing Written by Joanna Hoang http://www.greeniacs.com/GreeniacsGuides/Energy/Manual-Washing-Machine.html Manual Washing Machine Washing machines can cost hundreds and even thousands of dollars a year to run depending on your washing machine type‚ whether or not you use hot‚ warm‚ or cold water‚ your energy company’s prices‚ water company’s prices‚ and the number of loads you run per week! Most significantly‚ roughly ninety percent of the energy used by washing machines just
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a state of good health‚ we have to reduce the transmission to these pathogens. One proven method to interrupt the transmission is by maintaining hand hygiene. The objective of this integrative review was to examine the relationship between hand washing and incidence of health care associated infections (HCAIs) in healthcare settings and provide evidence based recommendations for the future directions for health care providers to prevent infections. Importance of maintaining hand
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Third great Chinese invention is gunpowder. Everything from Guy Fawke’s night fireworks to modern artillery shells owes their origin to this. Ancient necromancers searching for the elixir of everlasting life on behalf of the Emperor discovered that mixtures of certain fuels and ores could‚ if mixed in the right proportions and heated‚ produce an explosion. This led in time to the discovery of gunpowder. In 1044 Zeng Gongliang wrote “The Collection of the Most Important Military Techniques”‚ and in
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