decantation and sublimation. By performing these techniques‚ we examined our solutions such as SiO2 (sand)‚ NH4Cl (ammonium chloride)‚ and NaCl (sodium chloride) and mixed H2O (water) with each solution after being heated. After examining our solutions‚ we made calculations by finding the percent mass of each solution once the experiment was completed. In our findings‚ we were able to determine the mass of the determined and the percent recovery of matter. The outcome of the experiment was that we made the
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Journal of Medicinal Plants Research Vol. 5(10)‚ pp. 2035-2040‚ 18 May‚ 2011 Available online at http://www.academicjournals.org/JMPR ISSN 1996-0875 ©2011 Academic Journals Full Length Research Paper Screening of chemical composition of essential oil‚ mineral elements and antioxidant activity in Pulicaria Undulata (L.) C. A. Mey from Iran Mehdi Ravandeh1‚ Jafar Valizadeh2*‚ Meissam Noroozifar1 and Mozhgan Khorasani-Motlagh1 1 Department of Chemistry‚ University of Sistan and Baluchestan
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internal temperature so that the body processes can take place efficiently. The process ensures an equilibrium system is attained for all the body processes. The body temperature of an average individual is 37˚ C. this temperature fluctuates depending on activities one does. A human being is in constant movement unless they are asleep. As such‚ the temperature may increase or decrease thereby varying from this average. Some of the factors that may lead to increase in the body temperature include digestion
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when various pairs of solids or solutions are mixed. Equipment: 8 glass boiling tubes Boiling tube rack Spatula Polycarbonate glasses Bunsen burner Subtance List: Sodium carbonate solution Copper sulphate solution (Safety: High toxicity) Sodium hydroxide solution (Safety: Irritant) Ammonia solution (Safety: Toxic by inhalation) Potassium iodide solution (Safety: Mild irritant) Lead nitrate solution
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constituents as cations and non-metallic constituents as anions. In this experiment‚ you will analyze a known solution that contains the entire Group I cations—silver‚ lead‚ and mercury (I)—and an unknown solution to determine which ions are present and which are absent. II. DISCUSSION: The chlorides of Pb2+‚ Hg22+ and Ag+ are all insoluble in cold water. They can be removed as a group from solution by the addition of HCl. The reactions that occur are simple precipitations and can be represented by
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1) Explain why alveolar gas has a different composition from air. Atmospheric (external) air contains a high percentage of oxygen and nitrogen whereas alveoli gas contains a lower percentage of oxygen and a higher percentage of carbon dioxide. The differences in composition are due to the fact that gaseous exchange is taking place within the alveoli in the lungs. Oxygen is diffusing from the alveoli into the pulmonary artery and carbon dioxide is diffusing back into the alveoli from the pulmonary
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Lab Report Effect of temperature on enzyme activity I. Purpose: Determine how effect of temperature on enzyme (catalyse) activity (in the liver). II. Materials * Raw liver * Forceps * 50mL 1% hydrogen Peroxide (H * 25mL graduated cylinder * 50mL‚ 400mL beakers * Pureed liver * 5 Filter-paper disks * Paper towels * Timer or stopwatch * Thermometer * Hot plate III. Procedure 1.Gather all necessary materials; start
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Modern Music Composition Composition has been an ever-changing entity in our society. Music composition is also a very alternating subject of study. You have to keep up to date when you wish to compose a piece of music. This is strictly due to the progression of music in this day in age. If you fail to study‚ the music you are writing may‚ very well‚ upset the music community with old or potentially outdated material. The only way to stay up to date with composition is to listen to a lot
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DEPARTMENT OF TECHNOLOGY AND BUILT ENVIRONMENT Chinese culture‚ Chinese corporation culture and innovation How does a corporation implement innovation properly? Hengsong.TU & Xin.YUAN 06.2010 Master’s Thesis 1 Abstracts: 文化反映在人类生活中的很多方面，诸如做事情方式，沟通的礼节， 教育，历史事件，经济状况等等方面。在很大方面，一个国家的文化 会影响到企业的经营方式。通过当前比较流行的霍夫特德的文化区分 理论，我们了解到中国的文化特点体现为比较长的权利距离，集体主 义倾向，更男性化，强调风险规避以及考虑长期目标。因此，中国的 企业也长期处在中国文化的影响中，表现起来就是中国的企业更强调 集体文化，以及把企业当作家的思想。企业中存在许多的规章制度以 及等级观念，员工的晋升与个人的成就和服从相关联。通过这篇文 章，我们在一系列文献整理的基础上，更好的了解中国文化和中国企
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The Raven on Composing Edgar Allan Poe’s essay “The Philosophy of Composition” first took flight in the 1846 April edition of Graham’s Magazine. As someone who enjoys the emotional spontaneity accompanied with my favorite accomplishments‚ this essay goes in the face of how I feel. While this style may have been as the Edgar Allan Poe’s bird flies‚ it is clearly not the only way to success as made cleared by the continued re-writing‚ re-vamping‚ and re-issuing of the highly successful Whitman works
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