Toxic Effects of Pesticides Pesticides are widely used in agriculture for the control of weeds‚ insects or microorganisms leading to exposure to the population through contamination of water and residues in dust and on food‚ this exposure may lead to adverse health effects (Alavanja‚ Hoppin & Kamel 2004) and while there are many different agents that are implicated in these effects this discussion will focus on Organophosphate (OP) pesticides and their mechanisms with respect to human health.
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1. “The energy for life comes from the sun.” Outline the role of the photosynthesis process to explain what is meant by this statement. (3 marks) chlorophyll 6CO2(g) + 6H2O(l) + energy C6 H12 O6 (aq) + 6O2(g) 2830 kJ glucose Photosynthesis is the process in which plants use the sun’s light energy to convert carbon dioxide and water into carbohydrates such as glucose‚ sucrose‚ starch and cellulose. Carbohydrates are high energy
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NPTEL – Chemistry – Reagents and Organic reactions Module II Lecture 14 Reduction Reactions 2.1.1 Lithium Aluminum Hydride (LAH) 2.1.1.1 Introduction Lithium aluminum hydride (LAH) is a strong reducing agent with chemical formula LiAlH4. It can reduce a variety of functional groups such as aldehydes‚ esters‚ acids‚ ketones‚ nitriles‚ epoxides and azides. It vigorously reacts with water and all the reactions are performed in polar aprotic solvents. 2.1.1.2 Preparation It was first
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FACTSHEET Steel‚ aluminium and the carbon targets 2010—2050 The structure of the steel industry The steel industry consists of a large number of producers with an international reach. In 2007‚ 1.34 bn t of steel were produced which‚ together with iron‚ accounted for 65% of the $1‚594 billion global metals and mining market. Iron Ore Mining Industry Coke Direct Reduced Iron Pig Iron Project finance‚ brokers‚ traders & exchanges Steel Industry Secondary
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solution obtained by mixing 750 mL of 0.5(M)HCl with 250 mL of 2(M)HCl will be :(1) 0.875 M (2) 1.00 M (3) 1.75 M (4) 0.975 M Ans. (1) 37. Arrange the following compounds in order of decreasing acidity : 36. OH ; Cl (I) OH ; CH3 (II) OH ; NO2 (III) OH 1.51 V OCH3 (IV) E0 Cr2 O2 / Cr 3 7 MnO4 / Mn2 0.74 V ; E 0 1.33 V ; E 0 / Cl 1.36 V Cl (1) II > IV > I > III (2) I > II > III > IV (3) III > I > II > IV (4) IV > III > I > II Ans. (3) 38
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Cobalt Complexes Lab 4 Cobalt and its slew of complex children Abstract: Through a series of substitution reactions‚ different cobalt ammine complexes were created. These complexes were analyzed via‚ precipitation and gravimetric measures to determine that the substitution reactions that occurred. Introduction: Coordination chemistry is an important part of inorganic chemistry that involves the association and dissociation of ligands to a metal. The size‚ shape
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and move randomly Very compressible ρsolid > ρliquid >>>ρgas Substances that Exist as Gases (@ normal conditions = 25 °C‚ 1 atm) Elements Compounds H2 N2 O2 F2 Cl2 He Ne Ar Kr Xe Rn HF HCl HBr HI CO CO2 NH3 NO NO2 N2O SO2 H2S HCN Pressure pressure pressure force force area area SI: 1 N m-2 = 1 kg m-1 s-2 = pascal (Pa) Unit conversions: 1 atm = 101‚325 Pa = 101.325 kPa 1 bar = 105 Pa = 100 kPa 1 atm = 1.01325 bar 1 bar = 0.9869
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Binary Compounds w/ Fixed Charge Given The Formula‚ Write The Name Binary Compounds w/ Fixed Charge Given The Name‚ Write The Formula Binary Compounds w/ Variable Charge: Stock System Given The Name‚ Write The Formula Binary Compounds w/ Variable Charge: Stock System Given The Formula‚ Write TheName 1) MgO 2) LiBr 3) Ca3N2 4) Al2S3 5) KI 6) SrCl2 7) Na2S 8) RaBr2 9) MgS 10) AlN 11) Cs2S 12) KCl 13) Sr3P2 14) BaI2 15) NaF 16) CaBr2 17) BeO 18) SrS 19) BF3 20) AlP 21) Rb2O 22) CaI2
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Bacteria and gases of volcanic eruptions are examples of natural’s sources of pollutants. Gases released from the automobile and the chimneys are the example of manmade pollutants.Major Air pollutants: Carbon monoxide (CO)‚ Ozone (O3)‚ Nitrogen dioxide (NO2)‚ Sulphur dioxide (SO2) and lead. How to control air pollution? • Maintaining a healthy distance between the industrial and residential areas • The chimneys should be constructed tall in size so that the emissions must be released higher up in the
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Topic “THE ROLE OF POPULATION DEPARTMENT IN THE CONTROL OF POPULATION IN DISTRICT BUNER” I selected this topic for research‚ because over population is a social problem‚ which affects the whole society. Pakistan is the hit list of this problem. The world developed country like China‚ Japan and so on‚ which can’t succeed to control this current problem. Introduction of population: Population‚ term referring to the total human inhabitants of a specified area‚ such as a city‚ country‚ or
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