CHAPTER ONE 1.0 INTRODUCTION This report is a practical experience acquired by me in the course of my industrial training at Druckfarben Nigeria Limited (DFN) under the student industrial work experience scheme (SWIES). In the earlier stage of science and technology education in Nigeria‚ students were from their respective institutions without any technical knowledge or working experience. It was in this view that students undergoing science and technology related courses were mandated in different
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stationary phases. Technique in which the stationary phase is more polar than the mobile phase (e.g. toluene as the mobile phase‚ silica as the stationary phase) is called normal phase liquid chromatography (NPLC) and the opposite (e.g. water-methanol mixture as the mobile phase and C18 = octadecylsilyl as
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leaves‚ and fruits. · Roots and leaves‚ collected the year round. · Fruits‚ collected May to July. · Sun-dry. Constituents - The bark is poisonous‚ containing an toxic alkaloid. - Contains phenolics‚ flavonoids‚ anthocyanins and carotenoids. - Methanol extract of leaves yielded six polyphenols‚ viz.‚ corilagin‚ gallic‚ ferrulic‚ and ellagic acids‚ together with flavone vicinin II and dimmer amentoflavone. (See study below) (10) Properties Acidic tasting‚ warming nature. Astringent‚ antidysenteric
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International Journal of Pharma and Bio Sciences RESEARCH ARTICLE ARTICALTICLE MEDICINAL CHEMISTRY SYNTHESIS‚ CHARACTERIZATION AND BIOLOGICAL STUDIES OF SCHIFF BASES METAL COMPLEXES CO (II)‚ ZN (II)‚ NI (II)‚ AND MN (II) DERIVED FROM AMOXICILLIN TRIHYDRATE WITH VARIOUS ALDEHYDES. Corresponding Author SUNIL JOSHI Synthetic Lab‚ P. G. Department of Chemistry‚ Faculty of Science‚ Government College‚ Ajmer‚ Rajasthan (INDIA). Co Authors VATSALA PAWAR ‚ AND V.UMA Synthetic Lab‚ P. G
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Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
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This reduces the scientists’ credibility in the eyes of government and local people‚ and can cause problems the next time an eruption seems likely. 7. Prediction‚ forecasts and reactions - Active volcanoes all over the world are monitored using a vast array of scientific equipment. Satellites look for infrared radiation that indicates rising magma and ground instruments measure gas emissions‚ ground deformation and resulting earthquake activity. - Geologists use evidence from past eruptions
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and compressed. Liquid hydrogen is very‚ very cold--more than 423.2 degrees Fahrenheit below zero. Another way to get hydrogen to the fuel cell is to use a "reformer". A reformer is a device that removes the hydrogen from hydrocarbon fuels‚ like methanol or gasoline. When a fuel other than hydrogen is used‚ the fuel cell is no longer zero-emission‚ but it still may be very low emitting. Major parts of a fuel cell The anode‚ the negative post of the fuel cell‚ has several jobs. It conducts the
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mechanism for product. Procedure: Schoffstall‚ A.M.‚ Faddis‚ B.A.‚ and Durelinger‚ M.L. Microscale and Miniscale Organic Chemistry Laboratory Experiments‚ 2nd Ed.‚ McGraw-Hill‚ 2004‚ pages 215-218. Experiment 12.2 A Changes: Part A- No methanol recrystallization. Results and Observations * all literature values were obtained at www.sigmaaldrich.com Chemical Volume (mL) Mass (g) Density (g/mL) Molecular Weight (g/mol) Methyl-3-nitrobenzoate
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This project would not have existed today if it had not been for the following persons that I would like to thank: ← My family‚ teachers‚ friends‚ and anyone who have contributed to the success of this project. ← The management and staff of Methanol Holdings (Trinidad) Limited (MHTL) for their valuable contribution by providing the necessary data as received. ← My mentor‚ Mr. Derryck Dhanoosingh‚ for his dedication‚ time and advice given throughout the project. ← Most importantly God
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gravity 4. Boiling point 5. Freezing point 6. Refractive index 7. Electrical conductivity 8. Specific gravity 9. Co-efficient of thermal expansion 10. Thermal conductivity 11. Viscosity 12. Surface tension 13. Germicidal properly III. Chemical Properties 1. Acidity 2. PH 3. Buffering action 4. Oxidation -reduction potential IV. Conclusion Preface Milk cooperatives
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