UNIVERSITY OF DAR ES SALAAM COLLEGE OF NATURAL AND APPLIED SCIENCE Dept: Molecular biology and biotechnology Name: Ernest Medard Reg#:2010-04-00120 Degree program: Bsc. MBB BL 390: research project TITLE: production of Laccase and Pectinase enzymes by Schizophyllum spp and its application in dye decolorization Project supervisor: Dr. R. Masalu Lab scientist: Mr. Chuwa INTRODUCTION: Due to rapid industrialization and urbanization‚ a lot of chemicals including dyes are manufactured and
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Sawdust or wood dust is a by-product of cutting‚ grinding‚ drilling‚ sanding‚ or otherwise pulverizing wood with a saw or other tool; it is composed of fine particles of wood. It is also the byproduct of certain animals‚ birds and insects which live in wood‚ such as the woodpecker and carpenter ant. It can present a hazard in manufacturing industries‚ especially in terms of its flammability. Sawdust is the main component of particleboard. Contents [hide] 1 Practical uses 1.1 Use in food 2 Health
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P.1 Multiple Choice Questions 1) Water‚ ‚ is an example of a(n) ________. A) chemical B) solid C) wave D) electric charge E) element Answer: A 2) In this list‚ which substance can be classified as a chemical? A) salt B) sleep C) cold D) heat E) temperature Answer: A 3) One example of a chemical used in toothpaste is ________. A) chlorine B) sulfur C) carbon dioxide D) calcium carbonate E) sugar Answer: D 4) Which of the
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Unit 9 Selenium and Crohn’s Disease July 19‚ 2011 Selenium and Crohn’s Disease Antioxidants are any substance that reduces oxidative stress (Definition of Antioxidant‚ 2011)‚ oxidative stress can be defined as damage due oxygen. Antioxidants work in our body by slowing down or even preventing the oxidative process by neutralizing free radicals in our body. Free radicals are molecules produced when our body breaks down food‚ but we are also exposed to free radicals through oxygen
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away from our homes‚ our place of business‚ and our children. In the 1950s and 60s DDT was a very popular pesticide that was commonly used. The hazardous effects were unknown. Carson expresses her founded concerns about the adverse risks and toxicity associated with these pesticides using logical‚ emotional‚ and ethical appeal. This is demonstrated in the quote‚ “ Can anyone believe it is possible to lay down such a barrage of poisons on the surfaces of the earth without making it unfit for life
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decreased sympathetic tone‚ or anatomical changes. It is common in athletes and is relatively benign. It may even be beneficial in acute myocardial infarction (especially inferior). Pathological bradycardia may be symptomatic of a brain tumor‚ digitalis toxicity‚ heart block‚ or vagotonus. Cardiac output
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many pros and cons of fracking. The pros are that if any shortages are reached in oil or gas‚ fracking can help solve the problem by going deeper into the ground and releasing more than what would normally be obtainable. Another pro‚ is that air toxicity is reduced. In fracking‚ the water and other chemicals are injected down into the ground in cracks in the rock and it then enlarges the crack‚ allowing more gas or oil to be released thus not contaminating the air quality. There will will also be
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BACKGROUND OF THE STUDY Pest insects are based on the potential damage on human purpose. They cause damage to the agricultural crops‚ consume and or damage harvested food‚ cause illness or unproductively to agricultural animals‚ and vector human disease. For centuries man had made innovative ways in combining pest insects‚ which leads to the invention of insecticides. Though insecticides contributed big in the elimination of pest insects‚ it also contributed ecological alteration due to its toxic
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a) Describe the physico-chemical qualities of water that are important to aquaculturists. Aquaculture can be defined as the high-density production of fish‚ shellfish and plant forms in a controlled environment. Stocking rates for high-density aquaculture are typically thousand fold greater than wild environments. Modern fish culturists employ both open and close systems to raise fish. Open systems‚ such as‚ the raceways are characterized by rapid turnover of water. Closed systems are commonplace
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severe agitation. IV lorazepam was started due to persistent agitation. Diazepam was also added to the treatment. Over the course of 37 days the patient had escalating agitation and required continuous IV infusions of both lorazepam and diazepam. No toxicity from the high-dose medication was observed. In summary‚ the authors
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