proteins that control the speed of chemical reactions in your body. Without enzymes‚ these reactions would take place too slowly to keep you alive (WhoamI.com).” Methods Four clean test tubes were labelled 1-4. Each test tube was filled with 5 mL of 3.0% H2O2 and 3 mL of water from a separate
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90696 906960 For Supervisor’s use only 3 Level 3 Chemistry‚ 2008 90696 Describe oxidation-reduction processes Credits: Three 9.30 am Friday 28 November 2008 Check that the National Student Number (NSN) on your admission slip is the same as the number at the top of this page. You should answer ALL the questions in this booklet. A periodic table is provided on the Resource Sheet L3–CHEMR. If you need more space for any answer‚ use the page(s) provided at the back of this booklet and clearly
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chemical reaction by their symbols or formulas. Reversible reaction- a chemical reaction in which the products re-form the original Synthesis reaction- a composition‚ reaction‚ 2 or more substances combine to form a new compound Electrolysis- the decomposition of a substance by an electric current Double displacement reactions- the ions of 2 compounds exchange places in an aqueous solution to form 2 compounds Combustion reaction- a substance combines with oxygen‚ releasing a large amount of energy
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gfhjfh Ball Game project Documentation Report |Filename: |Ball Game project.doc | |Status: |draft | |Date: |8.11.2006 | |Author: |David Hill | Table of contents Ball Game project: Project Model 3 Ball game behaviour-Design: Sequence Diagram 4 Ball Game requirements: Use Case Diagram 8 Ball Game structure
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Chapter 15: • Matter is anything that has mass and takes up space. – Ex: Your textbook‚ you‚ your pen/pencil‚ air‚ etc. • Classification systems are used all the time to organize objects. – Ex: The Periodic Table of Elements‚ organizing your locker‚ your clothes‚ etc. • In order to make the study of matter easier to understand‚ scientists have developed ways to classify matter. • The properties of materials can be used to classify them into general categories. – Ex: Pure substances‚ elements
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imaginative world or lifestyle. Explosions are seen in different forms in movies to either depict a car engine steaming and then exploding to a house instantly exploding. The chemistry concept found within explosions are reactions such as decomposition‚ thermal decomposition and the combustion reaction. Coloured flames are seen in movies to represent something magical that is occurring such as a ritual. This is due to the vibrant colours used which communicate a sense of unusual yet visual appearance. chemistry
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Inflammation | * The succession of changes that occurs in a living‚ vascularized tissue when it receives a sublethal injury * Is designed to destroy‚ dilute‚ or otherwise inactivate the injurious agentIs designed to restore the tissue to its original state‚ insofar as possib | Acute Inflammation | Short durationAccumulation of neutrophils | Chronic Inflammation | Longer durationAccumulation of macrophages and lymphocytesProliferation of fibroblasts and blood vessels | Endothelial | Line
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This paper is the first to indicate antiemetic activity of the methanolic extract compositions of A. julibrissin flowers and its protective effect on mitochondria disruption induced by retching in brain of the young chickens. Nausea and vomiting are the symptoms of drug side effects‚ different disease and defenses responsive against poisoning. Recently‚ extensive researches have led to use of medicinal plants as a safe and reliable source of drugs with low or lack of toxicity and side effects [22
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done systematically from one to the next‚ only one element of each trial was changed at a time‚making it easy to single out the defining factors. There were many chemicals used during this experiment including Luminol‚ bleach‚ DMSO‚ NaOH‚ HCl‚ and H2O2. On the second day of trials‚ the Luminol was chilled to test the effects this would have on the glow we obtained through chemical reactions. Results of Day 1: Table 1: Trial | Luminol (D) |
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a by-product2 The hydrogen peroxide used in this practical as an oxidizing agent to produce the cobalt (III) acetylacetonate from cobalt (II) carbonate and a stoichiometrically calculated amount of acetylacetone3. 2CoCO3 + 6CH 3COCH 2COCH3 + H2O2 2Co(CH3COCHCOCH3 ) + 2CO2 + 4H2O 4 (1) Equation (1) shows stoichiometrically the reaction that occurs between the reagents. The transition of Co2+ to Co3+ is apparent by the colour change of the new complex formed which is a shiny greenish
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