Toxicological Chemistry - relates the aspects of toxicology to the chemical structure and reactivity of the toxin. It is concerned with the chemical interaction of the toxin with the receptor that gives the physiological response. The ultimate aim is to relate functional group chemistry of both toxin and receptor to the interaction Toxicity - the degree to which a substance causes damage to an organism Acute toxicity - the adverse effects resulting from a single exposure‚ or exposure over
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by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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Samuel Cho http://www.sciencedaily.com/releases/2012/12/121204081138.htm http://www.sciencedaily.com/releases/2013/02/130220170631.htm Word Count: 754 words The two articles I have picked from the Science Daily website are titled “Plastic Packaging Industry Is Moving Towards Completely Bio-Based Products” and “Turning Pine Sap Into ’Ever-Green’ Plastics.” I have decided to write a cumulative summary on the two articles because of my prolonged interest in environmental conservation and sustainable
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Fireworks and What Makes Them Go Sparks! Colors! Things that go BOOM! Chemistry doesn’t get much better than this. Ever notice how minutes drag on for hours when you’re waiting for a fireworks show to begin? Everyone’s thinking the same thing: The sky is dark enough the hot dogs are all eaten…come on when are they going to start? Then the first rockets streak into the sky…Ooh! Aah! Yes‚ it was worth the wait. The birthplace of fireworks is generally recognized as China.
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The feeling in the hospital room was eerie. It was weird and horrible to be sitting there‚ waiting. I could not believe that I was the one sitting in the emergency room. I was only fourteen years old. I was not supposed to be in this type of pain. A typical day of relaxing‚ and riding horses ended up to be a life changing day for me. Earlier that day I had been riding my horse‚ Shane. Everything was going as usual; we had warmed up and were now running through the pasture. We had done this dozens
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Match and Water in a Glass Science Magic Trick Fun Trick with Fire and Water This is a simple and interesting science magic trick involving fire and water. All you need is water‚ a glass‚ a plate‚ and a couple of matches. Pour water into a plate‚ light a match in the center of the dish and cover it with a glass. The water will be drawn into the glass. Match and Water Trick Materials • plate • water • 2 wooden matches • a quarter or other large coin • colored water
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THE UNIVERSITY OF MELBOURNE DEPARTMENT OF ECONOMICS SEMESTER 1 ASSESSMENT‚ 2011 ECON10004 INTRODUCTORY MICROECONOMICS Time Allowed: TWO hours Reading Time: 15 minutes This examination paper contributes 60% to the assessment in ECON10004. The Response Sheet for the multiple-choice questions should be inserted in the back of the examination script book at the end of the examination. For the multiple-choice questions‚ you may use the examination script books to make notes or calculations
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Suggestive Solutions Guide to Past Exam Papers Dr. M. H. Nabin 1 Important Message I have put some suggestive solutions or at least some hints for the past exam papers starting from year 2004. In so doing‚ I emphasize T 1‚ T 2 and T 3 of 2010‚ T 1 and T 2 year 2009‚ S1 and S2 of year 2008‚ S1 and S2 of year 2007‚ S1 and S2 of year 2006 — these past exam papers are more relevant to our current courses as we have used the same textbook‚ course outline and study guide. Please ignore the multiplier
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Chemistry Revision F331 Isotopes - atoms with the same atomic number‚ but different mass numbers 131I - radioactive tracer for thyroid. 99Tc for tumours. Radioisotopes - gamma emitters & short half life - long enough to detect‚ but not long enough for damage. Beta particles emitters are more useful than alpha particle emitters because they penetrate more and so are more easily detected. Also‚ less damaging. The half life is the time taken for half the isotope to decay Mass left = initial
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Bibliography: Heyworth‚ Rex M Dr‚ and J G R Briggs. Chemistry Insights. Singapore: Pearson Education South East Asia‚ 2007 http://www.google.com http://www.ausetute.com.au/elecysis.html http://www.nmsea.org/Curriculhttp://www.nmsea.org/Curriculum/7_12/electrolysis/electrolysis.htmum/7_12/electrolysis/electrolysis
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