INTRODUCTION: OCCURANCE OF CHROMIUM: Chromium is a heavy metal which is considered as an environmental pollutant (Nafish et al‚ .2012). It is 7th most occurring element on earth and its average concentration in the earth is about 100mg/kg. (Panda and Choudhory‚ .2005). Apart from its importance chromium causing serious hazards for those organisms and plants that are exposed to the chromium in polluted areas of high concentrations. Being highly toxic metal it mainly comes from leather tanning‚ textile
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Some polymers have several functional groups. 3. The exact arrangement of a functional group in a molecule greatly influences and determines the chemical properties of the particular molecule. 4. Important Functional Groups: a. Hydroxyl b. Carbonyl c. Carboxyl d. Amino e. Sulfhydryl f. Phosphate D. The Formation and Destruction of Polymers 1. Dehydration (Condensation) Reactions-reactions in which monomers bond together to produce polymers.
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conditions; D-glucose exists as a mixture of cyclic hemi-acetals (ring) and open-chain (acyclic) form within aqueous solution. The ring of D-glucose consists of 5 carbons and oxygen which each carbon is linked to a hydroxyl group with exception of the 5th carbon which is linked to a methyl-hydroxyl group. D-Glucose has 4 chiral centers when it is in ring form which the anomeric carbon appears at C1 which lead to the structure of α(axial‚ down) and β(equatorial‚ up) position 2. The ratio of this anomer exists
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PUSAT PENGAJIAN TEKNOLOGI INDUSTRI IMG 103/3 FOOD CHEMISTRY LAB REPORT Experiment 3 : Qualitative Test for Carbohydrate Date of Experiment: 27/03/2013 Date of Submission: 17/04/2013 Submitted by: Name: Te Hui Min Matric No.: 115615 Group: 4 Title Qualitative test for carbohydrate Introduction Carbohydrates are essential in foods as an energy source (starch is the main source of human calories)‚ a flavouring (simple sugars are usually sweet) and as a functional
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1…………….ROLE OF MOLECULAR BIOLOGY IN THE 21ST CENTURY THE STATEMENT: Molecular biology of the 21st century‚ which says that the science devoted to elucidating the structure and function of genomes. On the other hand‚ the major advances gave rise to central dogma of molecular biology‚ comprising the three major processes in the cellular utilization of genetic information. The first is replication‚ the copying of parental DNA to form daughter DNA molecules with identical nucleotide sequences. The second
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Title: Preparation and Assay of Phenolase and Peroxidase from Sweet and Irish Potato Aim To design and conduct an experiment to demonstrate the presence of enzyme activity in the preparation provided. To examine the effect of the inhibitors provided. To test whether the other phenolic substrates provided can be oxidized by the enzyme preparation. To test for the presence of peroxidase activity in the enzyme preparation. To test the effect of the inhibitor provided on peroxidase activity
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The present invention relates to polyvinyl chloride plastisol compositions‚ for example sealant compositions. In the manufacture of automobiles‚ the automobile body is initially primed with a coating composition to prevent corrosion of the metal. This can be done in a number of ways although generally it is performed by cationic electrodeposition using the auto body as the cathode. Once the automobile body has been primed in this manner‚ subsequent steps in the assembly are carried out. These
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Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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Air Pollution in Hong Kong Chemistry Project the Written Report 1.Introduction 3 2.Sources of Air Pollution 3 - 7 1.Vehicles 4 - 5 1. Pollutants produced by vehicles 4 2. Reasons why pollutants are produced 4 3. Impacts of the pollutants from vehicles 4 - 5 4. Method to eliminate pollutants 5 2.Power Stations 6 - 7 1. Pollutants produced by power stations 6 2. Reasons why pollutants are produced 6 3. Impacts of the pollutants from power stations 6 4. Methods to eliminate
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Study guide Exam 1 Ch 1-5 CH 1 Overview‚ what is evolution‚ what is biology‚ what is life Evolution scientific explanation for: the unity and diversity we see in various organisms the suitability of organisms to their environments is evolution Hierarchy – molecules‚ cells‚ tissue‚ organ‚ organisms‚ populations‚ communities‚ ecosystem‚ biosphere Emergent properties – zooming from molecular level out to see function Reductionism (complex to simple) and Systems Biology (dynamic) Organisms
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