Write your name here Surname Other names Centre Number Candidate Number Edexcel IGCSE Chemistry Unit: 4CH0 Science (Double Award) 4SC0 Paper: 1C Wednesday 25 May 2011 – Morning Time: 2 hours Paper Reference 4CH0/1C 4SC0/1C You must have: Ruler Candidates may use a calculator. Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ Fill at the top of this • centre number and candidate number. all • Answer
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Protein Hydrolysis and Characterization Group 7 Niez‚ Robert Francis‚ *Orbin‚ Alfonso Ricardo* Parro‚ Athena Emmanuelle Peralta‚ Christian Department of Biological Sciences‚ University of Santo Tomas‚ Manila‚ Philippines • Abstract Hydrolyzed Protein is protein that has been hydrolyzed or broken down into its component amino acids. While there are many means of achieving this‚ two of the most common are prolonged boiling in a strong acid (acid-HVP) or strong base or using an enzyme such
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waters‚ such as lakes and streams. Phosphates are essential to aquatic plant growth‚ but too much phosphate can lead to the growth of algae and results in an algae bloom. Too much algae can cause a decrease in the amount in dissolved oxygen in the water. Oxygen in water is affected in many different ways by phosphates Phosphorus is usually present in natural waters as phosphate(Mcwelsh and Raintree‚ 1998). Phosphates are present in fertilizers and laundry detergents and can enter the water from
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Oxygen Exchange and Transport Oxygen exchange or respiration takes place at a respiratory surface; a boundary between the external environment and the interior of the body. Gas exchange is the process by which oxygen and carbon dioxide (the respiratory gases) move in opposite directions across an organism’s respiratory membranes‚ between the air or water of the external environment and the body fluids of the internal environment. Oxygen is needed by cells to extract energy from organic molecules
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OXYGEN-CARBON CYCLE The carbon-oxygen cycles are actually two independent cycles. However‚ both these cycles are interconnected as well as interdependent on each other to some extent. There are four processes involved in the completion of the carbon-oxygen cycle. Oxygen-carbon cycle processes are: * Photosynthesis Plants undergo photosynthesis that helps them produce energy and food for themselves. During photosynthesis‚ plants take in carbon dioxide (CO2) and absorb water (H2O) with the help
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Characterization Writing Click! I heard the door slide open‚ hitting the wall with a soft thud. I opened my eyes and saw the shadow of a dark figure holding a knife in the doorway. I pulled the blanket up to cover my face‚ leaving only my eyes uncovered. I heard the creak of a floorboard‚ and the shadow advanced towards me‚ a silent murderer. I slid completely underneath the blankets‚ willing myself to wake up from this nightmare. I heard the sound of another footstep‚ whipped of the blanket‚
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Macbeth Project 4) CHARACTERIZATION: Macbeth: 1.) “Stars‚ hide your fires; let not light see my black and deep desires.” (I‚iv‚57-58) This quote reveals Macbeth’s evil desire to kill King Duncan to be deemed king of Scotland. 2.) “So foul and fair a day I have not seen.” (I‚iii‚39) This quote is the first line spoken by Macbeth‚ and it reveals that Macbeth almost foreshadows the bottom of his wheel is nearing. 3.) “Stay‚ you imperfect speakers. Tell me more.” (I‚iii‚73) This quote reveals
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Preparation and Characterization of Alkene Balacanao‚ Gladys A.1‚ Miranda‚ MarilynI2 1 Student (s)‚ Subject/Section‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology; 2 Professor‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapua Institute of Technology [pic] ABSTRACT The purpose of this experiment is to prepare cyclohexene form cyclohexanol‚ and know the properties of alkene. The first part of this experiment is preparation of cyclohexene
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Characterization of Hester In D.H. Lawrence’s offsetting story The Rocking Horse Winner‚ there are a number of intriguing characters presented to us. None‚ however‚ are quite as thought provoking or as clearly defined as Paul’s morally culpable‚ denatured mother‚ Hester. In a story full of viscous‚ confusing characters‚ Hester is directly and indirectly characterized as being a loveless‚ spiteful‚ greedy woman‚ who abides to the philosophy that luck coincides with prosperity. The first indicator
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Nucleic Acids through a variety of tests specifically‚ Dische‚ Murexide‚ Wheeler-Johnson and Phosphate Tests in order to exemplify structural features of nucleic acids as well as identify the principle involved in each chemical test. Different procedures and different test compounds were applied‚ and results were noted as for changes in colors of precipitates or solutions. For Dische Test‚ light blue was obtained for RNA and dark violet for DNA. For Murexide Test‚ a yellow layer was obtained with
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