"Photometric colorimeter" Essays and Research Papers

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    Why it is important for all laboratory procedures and practices to be followed and communicated through the team. It is very important that the laboratory procedures and practices are communicated throughout the lab for the most important reason being safety. This prevents any danger and minimises risks as much as possible. For example the chemical store management minimises risks by following the correct procedures and storing the chemicals in the correct and safe places. This minimises the risks

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    Sulphonation – The Process Most electrophilic substitution reactions are irreversible but sulfonation is an exception. Treatment of benzene with "oleum" (a solution of SO3 in concentrated sulfuric acid) will give the sulfonic acid‚ the electrophilic species being sulfur trioxide which is Lewis acidic. Fig – 1 Sulphonation : Benzene equation The sulfonic acid can be converted back by treatment with hot aqueous acid. The reason for this reversibility is the fact that the Wheland intermediate is overall

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    AN INVESTIGATION TO FIND THE EFFECT OF BILE SALTS OF ON THE DIGESTION OF LIPIDS I have investigated that if there is an effect of bile salts on the digestion of lipids in the milk. When lipids are broken down in to fatty acids and glycerol (see below)‚ the acid lowers the pH of the mixture. To help me determine and measure the digestion of lipids‚ a pH indicator phenolphthalein has been used to measure the pH of the mixtures. The pH indicator will change the colour from pink to either white (if

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    Planetary Mapping

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    Planetary Mapping TSANG Chi Chiu BSc. (Hons.) SURVEYING AND GEO-INFORMATICS THE HONG KONG POLYTECHIC UNIVERSITY 2006 Planetary Mapping TSANG Chi Chiu Abstract of dissertation entitled: Planetary Mapping Submitted by TSANG Chi Chiu‚ 03330846d for the degree of Bachelor of Science (Hons.) in Surveying and Geo-Informatics at The Hong Kong Polytechnic University in May‚ 2006. 1 Planetary Mapping TSANG Chi Chiu Abstract Map making can be dated back to the

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    Chemical Equilibrium Lab

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    [FeSCN2+]/([Fe3+]•[SCN-] For this experiment we were able to determine the equilibrium constant KC for this reaction. First we prepared five different mixtures with known initial concentrations of iron (III) and thiocyanate ion. By using the colorimeter we determined the absorbance of each mixture once it reached equilibrium. Looking at the equation above we see that the mole to mole ration between SCN- and FeSCN2+ is 1:1 so we can simply set up a ratio using the absorbancy to find the consentration

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    amyloliquifaciens and Aspergillus niger General Lab Requirements: • Autoclave or pressure cooker • Hot Plate or Microwave oven • Nutrient Agar powder • Potato Dextrose Agar powder • Soluble starch • Weighing scales • Shaker • Spectrophotometer or colorimeter • Water bath (Temperature controlled) Materials per group of 4 students • Hand trowel or disposable spoons • Sterile pipettes (One each of 10 mL‚ 5 mL and 1 mL) • Pipette pumps • Six bottles of sterile water‚ containing 90 mL each • Sterile

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    Sop for Mba

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    NAME: MAHESH KUMAR SAMALA PROGRAM: PHARMACEUTICAL MANAGEMENT MBA UNIVERSITY: FAIRLEIGH DIKINSON UNIVERSITY STATEMENT OF PURPOSE There is a maxim that the secret of every individual’s success‚ strength and glory is knowledge. Knowledge is that which we acquire through relentless hard work‚ curious observation and constant learning. As looking only through long-term association

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    Biophysics Lab

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    PSBPP103 Differential Gram’s staining EXPERIMENT NO. 1 AIM: THEORY: Page No: C1 Date: To Gram stain the given bacterial suspension and to differentiate between gram positive and gram negative organism. Visualization of microorganisms in the living state is very difficult‚ not just because they are minute‚ but because they are transparent and almost colorless when suspended in an aqueous medium. To study their properties and divide microorganisms into specific groups for diagnostic purposes

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    Past Exam

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    Write your name here Surname Other names Centre Number Candidate Number Edexcel GCE Biology Advanced Subsidiary Unit 1: Lifestyle‚ Transport‚ Genes and Health Thursday 8 January 2009 – Morning Time: 1 hour 15 minutes You do not need any other materials. Paper Reference 6BI01/01 Total Marks Instructions se b ink or • Uill inlack boxesball-point pen. page with your name‚ a the top of this • F the andt candidate number. centre number uestions. • Answer all qquestions

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    Being trained in securing photometric data on globular clusters using the Mount Wilson 60-inch‚ Sandage‚ Halton Arp‚ and William Baum began searching for the main sequences of globular clusters‚ something that had not yet been discovered. Globular clusters are tightly packed groups

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