which is somewhat similar to the literature value of 0.00845 m-1 (Brasted and Hiriyama 1958). The half-life (t 1/2) was found to be 75.34 minutes. Introduction: The compound [Co(en)2Cl2]+ is known as a coordination complex‚ that is‚ it consists of a Cobalt atom surrounded by an array of molecules to which it is bound‚ called ligands (Brown 2010). In this case the ligands are Ethylenediamine which are ‘bidentate’‚ meaning bound in two locations. These ligands are bonded between the two Nitrogen atoms
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MICROBIAL NUTRITION Nutrition which is also called as nourishment or aliment is a provision to the cells and organisms with the materials necessary to support life. Here it deals with the nutrition in microorganism which is called as microbial nutrition. Nutrients may be divided into three general‚ often overlapping categories: Those that supply energy‚ those that supply carbon‚ and those that supply any and everything else. In this lecture we will consider nutrition from the point
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Apeejay School Kolkata (WEST BENGAL) DEPARTMENT OF CHEMISTRY This is to satisfy that Ritika Kataruka bearing Roll no _______ Studyng in class XII (Science) of this institution has successfully completed the Chemistry Project. “To Study the quantity of casein present in different samples of Milk” Based on the syllabus of C.B.S.E. council for the session 2013-2014 AISSCE under my guidance and supervision and has given satisfactory account
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Utilization of Camias in the production of “Bilimbi Juice” Camias Averrhoa bilimbi (commonly known as bilimbi‚ cucumber tree‚ or tree sorrel) is a fruit-bearing tree of the genus Averrhoa‚ family Oxalidaceae. It is a close relative of carambola tree. It is very common in Thailand‚ Malaya and Singapore. The bilimbi is closely allied to the carambola but quite different in appearance‚ manner of fruiting‚ flavor and uses. The only strictly English names are "cucumber
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colorless crystalline solid that dissolves in water to give colorless solutions. It is classified as a dicarboxylic acid. In terms of acid strength‚ it is much stronger than acetic acid. Oxalic acid is a reducing agent and its conjugate base‚ known as oxalate (C2O42−)‚ is a chelating agent for metal cations. Typically‚ oxalic acid occurs as the dihydrate with the formula H2C2O4·2H2O. Oral consumption of oxalic acid or prolonged skin contact is dangerous. Malic acid is an organic compound with the formula
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p8534‚ of Journal of Organic Chemistry vol 73‚ 2008. Thieno[3‚4-b]pyrazine-2‚3(1H‚4H)-dione (5). The following is a modification of previously reported methods. 3‚4-Diaminothiophene (2.85g‚ 25 mmol) was dissolved in 20mL of absolute ethanol. Diethyl oxalate (30mL‚ 220 mmol) was added to the solution. The reaction mixture was refluxed for 8h. After the reaction mixture cooled to room temperature‚ the solid residue was recovered by vacuum filtration. The
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INVESTIGATION 12.A Target Skills Determining the reactivity of various metals Testing Relative Oxidizing and Reducing Strengths of Metal Atoms and Ions By observing whether reactions occur between solid metals and metal ions in solution‚ you can determine the order of oxidizing and reducing agents according to strength. Question How can the presence or absence of a reaction provide information about the relative strength of oxidizing and reducing agents? Safety Precautions
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M07/4/PHYSI/SP3/ENG/TZ1/XX+ IB DIPLOMA PROGRAMME PROGRAMME DU DIPLÔME DU BI PROGRAMA DEL DIPLOMA DEL BI 22076512 physics sTANDARD level pApeR 3 Candidate session number Thursday 3 May 2007 (morning) 0 1 hour 0 INSTRUCTIONS TO CANDIDATES • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options in the spaces provided. At the end of the examination
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used were acid-base titrations‚ redox titrations‚ gravity filtration‚ and distillation. General conclusions included Procedures Weight of Crucibles 1. The first experiment is Preparation of a Cobalt Amine Bromide Product ; Synthesis #3 was used to create the compound. Added 5 grams of cobalt carbonate to 20 mL of hrdrobromic acid in a beaker. Noticied a slight color change to dark purple. Solution frothed after it settled I mixed in 15mL water and did a gravity filtration. Added the filtrate
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9.2.5 Chemistry past paper questions 2001 Question 16 (3 marks) Radioisotopes are used in industry‚ medicine and chemical analysis. For ONE of these fields‚ relate the use of a named radioisotope to its properties. Medicine – Iodine Ingested iodine concentrates in the thyroid gland and so iodine 131 can treat thyroid disorders (e.g. tumours) Iodine 131 has a half life of just over 8 days‚ emits beta particles and gamma rays as it decays. This half life is long enough for it to be transported form
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