Tetraphenylcyclopentadienone Joshua Krank Principles of Organic Chemistry Laboratory‚ Department of Chemistry and Biochemistry North Dakota State University‚ Fargo‚ ND 58102 Introduction: The purpose of this experiment was to synthesize tetraphenylcyclopentadienone using a reaction of dibenzyl ketone (1‚3-diphenyl-2-propanone) with benzil in the presence of base. The reaction then proceeded with an aldol condensation reaction.5 This product was obtained using extraction (reflux)‚ recrystallization
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Anticholinergic (Parasympatholytic) Bronchodilators History and Development The prototype anticholinergic agent is atropine‚ which is found naturally in the plants Atropa belladonna and the Datura species. Scopalamine is also extracted from the belladonna plant‚ and both atropine and scopolamine are called belladonna alkaloids. |Agent |Date |Event | |Belladonna
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CHAPTER ONE INTRODUCTION 1.1 BACKGROUND OF THE STUDY The administration of staff incentives scheme has now become a popular phenomenon of the total personnel policy of any organization. The scheme involves these extra benefits which may not necessarily be money‚ which emanate from the kind relationship of the employer to the employees‚ to supplement their usual wages‚ from time and which are at most times geared purposely towards the enhancement of workers performance in the organization. This
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2008 UNDERSTANDING ACTION VERBS USED IN N.E.B.O.S.H. EXAMINATIONS ETA Consultancy® Contents Understanding Action Verbs ............................................................................................................................... 3 Introduction...................................................................................................................................................... 3 Answer length......................................................
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label text is printed directly on the fabric‚ without the solid background. Based on a thorough analysis by the company‚ its suppliers‚ and several independent doctors and other specialists‚ Carter’s has found that these labels contain no known skin irritants or abrasive chemicals‚ and the problem seems to affect only a very small number of children with sensitive skin. In addition‚ out of 100 million garments sold in this line‚ the company has received only 400 complaints total of rashes. Because the
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patients who are in the high-risk categories. Most patients who develop hypokalemia are placed on either oral or parenteral potassium supplements. Potassium is not administered intramuscularly or subcutaneously because potassium is a profound tissue irritant. Parenteral potassium should be administered with extreme caution. Potassium solutions irritate veins and can cause a chemical phlebitis. Foods high in potassium can help restore potassium levels as well as prevent further potassium loss. Collaboration
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Repeat steps 3 and 4 with beaker 3 with no water‚ record room temperature. 7. Repeat steps 2-4 with beaker 4 and heated water of 37˚C. 8. Repeat steps 2-4 with beaker 5 and heated water of 50˚C. Risk assessment: As hydrogen peroxide is an irritant‚ wear safety goggles to protect eyes from possible splashes and clean up any spillages quickly. Equipment will be hot and may cause burns. Handle equipment with caution and use test tube pegs when dealing with hot test tubes. Results: Beaker
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smells of rotten eggs at higher concentrations. Hydrogen selenide is also dangerous to the environment. Hydrogen selenide is hazardous‚ being the most toxic selenium compound and far more toxic than its congener hydrogen sulfide.. The gas acts as an irritant at concentrations higher than 0.3 ppm‚ which is the main warning sign of
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women see themselves and how they want others to see them.” They discourage women from pursuing these fields at the risk of also being seen in the same negative portrayal‚ as being looked down upon as cold‚ distant‚ frumpy‚ unsociable‚ and on the fringe of society. There cannot possibly be a discussion to increase women’s interest in STEM fields without addressing the American medias portrayal of women that choose those fields. The media can include women in STEM fields without marginlizing the entire
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as the real “true image.” She had telepathic powers on a level where she could send thought pictures midway across the world to Petra in Labrador. The Sealand woman liked change whereas David’s father hated change. In the heat of the battle in the Fringes‚ after Gordon and Sophie died from a cloudburst of arrows‚ a raft arisen and ended the bloodbath. In that raft was the angelic Sealand woman. She made the raft fire a web-like substance upon the rebellious people below and the substance casted a paralysis
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