Global Warming Problem Solving Theory BY 6/30/2014 OUTLINE 1. Introduction …………………………………………………………….3 2. Global Warming .....…………………………………………………………3 3. Conclusion ……………………………………………………………
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Agarose Gel Electophoresis of DNA Topoisomers Introduction DNA can exist as different isomers that change the confirmation of the DNA’s structure. DNA can be in a linear confirmation this is a relaxed confirmation as the DNA can rotate about its axis unconstrained. It can also exist as a nicked circle this is also a relaxed confirmation as the DNA strands can again rotate freely with respect to one another. Covalently closed circular DNA or cccDNA exists as a supercoil this is because the covalent
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limits the size of the primary beam to the area of interest‚ thereby minimizing patient exposure to the primary beam. Developer Solution- A chemical (potassium bromide) used in a developer to check the development of the unexposed silver bromide and to control the working speed of the developer with respect to the exposed silver bromide. The developer also contains a reducing agent. Electromagnetic Energy- The forms of energy propagated by wave motion as photons or discrete quanta. The forms of
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STAT 601 – Assignment #5 (Due Monday‚ July 2nd ) Review the following: Lecture Handouts : 10 – Oneway ANOVA – Completely Randomized Block Designs Narrated Powerpoint Lectures: under heading 11 – parts (a) - (c) Non-narrated Powerpoint Lectures: under heading 11 – parts (a) – (c) Please note: part (c) is covered in the Powerpoints for part (a) and (b)‚ i.e. there is no separate Powerpoint for (c). RESEARCH PAPER QUESTIONS 1 - ANOVA and Multiple Comparisons in Published Research
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In the first part of this experiment acetic anhydride was used to prepare acetanilide which could then be readily brominated to form a mono-brominated product‚ with the bromine positioned at either the ortho‚ meta or para position on the aromatic ring. Acetic anhydride is very reactive towards nucleophiles and this reactivity is the result of the difference in electronegativities of the carbon and oxygen atoms that are bonded in acetic anhydride. This difference in electronegativities causes one
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Second step: rxn of the Grignard reagent with acetophenone‚ quenching with ammonium chloride Isolation of the product‚ identification Possible or actual sources of error Part one of our experiment consisted of the preparation of phenylmagnesium bromide from bromobenzene. PhMgBr is an organometallic reagent‚ a class of nucleophile known as a Grignard reagent. Gringard reagents are a class of extremely reactive chemical compounds used in the synthesis of hydrocarbons‚ alcohols‚ carboxylic acids‚ and
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Buffers‚ and pH‚ and Diffusion oh my The pH of a solution is the measure of the concentration of charged Hydrogen ions in that given solution. A solution with a pH lower than seven is considered to be acidic. A solution with a higher pH is a base. It is very important for organisms to maintain a stable pH. Biological molecules such as proteins function only at a certain pH level and any changes in pH can result in them not functioning properly. To maintain these constant pH levels‚ buffer solutions
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sample in test tube+ 1 drop dilute neutral KMnO4‚ if NO DECOLORIZATION warm mixture. Primary Alcohol( carboxylic acid Secondary Alcohol( ketones Tertiary( none Phenols Reaction with bromine/water (Confirms if phenol compound) Reagent: bromine in H2O Observation: Disappearance of orange-brown bromine color‚ then formation of white precipitate Procedure: 3 drops phenol soln on test tube+ Br in H2O drop by drop while shaking‚ observe formation of ppt Oxidation by KMnO4 (Confirms if phenol
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seven minutes from start to finish. First‚ via intravenous lines‚ sodium thiopental is inserted into the body’s system. It is an anesthetic that numbs the entire body and that only last a couple of minutes under normal conditions. Next‚ pancuronium bromide is injected‚ paralyzing all of the body’s muscles‚ including facial
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recrystallized from methanol‚ yielding 0.128g of pale yellow crystals with a melting point of 131-135 oC. This represents 0.33% of the original mass of the two yolks. The cholesterol was then dissolved in ether and further purified by bromination with a bromine/acetic acid reagent and debromination with zinc powder‚ a series of aqueous washes‚ and a final recrystallization from methanol. Here‚ a yield of 28% was recovered from an initial mass of 100 mg of recrystallized material. The melting point of the
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