TANNERY INDUSTRIES IN THE HAJARIBAGH AREA AND ITS IMPACT ON THE URBAN FORM AND MORPHOLOGY [pic] A b s t r a c t Hazaribagh is a densely populated unplanned area of Dhaka city where about 185 leather processing industries have been operating and discharging solid and liquid wastes directly to the low-lying areas‚ river and natural canals without proper treatment. For this unsympathetic development of the city urban living environment is deteriorating and becoming unlivable. Hazaribagh area is
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thyroid problems) Iron 59 (half-life of 45.1 days‚ used to examine red blood cells) Molybdenum 99 (half- life of 67 hours‚ used to study metabolism) Phosphorous 32 (half-life of 14.3 days‚ used to study the eyes‚ liver‚ and tumors) Chromium 51 (half-life of 27.8 days‚ used to study red blood cells) Strontium (half-life of 87 2.8 hours‚ used to study bones) Sodium 24 (half-life of 14.8 hours‚ used to study the circulatory system) • Tracers are usually injected into a person’s
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Mutagens may be of physical‚ chemical or biological origin. They may act directly on the DNA‚ causing direct damage to the DNA‚ and most often result in replication error. Some however may act on the replication mechanism and chromosomal partition. Many mutagens are not mutagenic by themselves‚ but can form mutagenic metabolites through cellular processes. Such mutagens are called promutagens. [edit]Physical mutagens Ionizing radiations such as X-rays‚ gamma rays and alpha particles may cause DNA
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Kagan McDonald Mrs. Wilmott SAE 2nd 10/1/13 Welding Risk and Safety Precautions Welding is a really good blue collar job that pays well‚ but has its ups and downs. Welders have to deal with hazardous welding fumes that can affect their health in numerous ways. There are several different types of welding fumes and mixtures that a welder can inhale while performing a welding task. A welder’s risk of getting sick from welding depends on the different types of metals being welded and the
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base was added‚ the solution turned into a bright yellow colour. This was difficult to observe as the colour change was very subtle‚ however‚ interpretation was manageable as pH paper was used to find when the addition of base should be stopped. Chromium oxide green was synthesized from the reaction between potassium dichromate and sulfur. The reaction involved heat thus‚ sulfur dioxide gas was released and colour change was observed from bright red to black. The final inorganic pigment was dark
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tionStudent Name: Laura Scott Student Number: C11356616 Lab Partners Name: Charlotte Weir Experiment Name: Yeast Fermentation Experiment Date: 2nd and 9th November 2011 Submission Date: 23rd November 2011 Title Yeast Fermentation Purpose To allow for fermentation of the yeast‚ Saccharomyces Cerevisiae‚ in Grape and Apple juice. Materials provided Test-tube containing Grape juice and a Durham tube Test-tube containing Apple juice and a Durham tube Plate culture of the yeast
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ion barium ion Ag + silver ion N 3¯ nitride radium ion Ni2+ nickel ion P 3¯ phosphide 3+ 3¯ zinc ion Al aluminum ion As arsenide Systematic name (Stock system) copper(I) copper(II) iron(II) iron(III) tin(II) tin(IV) chromium(II) chromium(III) manganese(II) manganese(III) Common name cuprous cupric ferrous ferric stannous stannic chromous chromic manganous manganic Symbol Hg22+ Hg2+ Pb2+ Pb4+ Co2+ Co3+ Au + Au 3+ Systematic name (Stock system)
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Green computingFrom Wikipedia‚ the free encyclopediaJump to: navigation‚ search Green computing or green IT‚ refers to environmentally sustainable computing or IT. In the article Harnessing Green IT: Principles and Practices‚ San Murugesan defines the field of green computing as "the study and practice of designing‚ manufacturing‚ using‚ and disposing of computers‚ servers‚ and associated subsystems—such as monitors‚ printers‚ storage devices‚ and networking and communications systems—efficiently
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significant‚ are shown in Table 53-6. To sum up 1981 and 1995‚ the progress of the grinding media has taken two big step First‚ forging‚ casting‚ heat treatment‚ a significant reduction in the unit consumption of grinding media; the implementation of low-chromium alloy the low quality of ball gradually out of the market. 10 years in the late 20th century to the early 21st century. A large number of annual handling capacity of below 500 000 t of small iron ore dressing plant growing generally abandoned the
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the process at high pressure is to ensure maximum separation of product‚ by-products and unreacted Ethanol after the reactor. The mixture is pre-heated to a temperature of 275oC (the optimum temperature for dehydrogenation of Ethanol using Copper-Chromium-Cobalt catalyst) before entering the packed bed reactor. The reaction takes place in gaseous state. The reason for using a packed bed reactor is because it allows gaseous reactions‚ has higher conversion per weight of catalyst compared to other catalytic
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