interactions with the column. The Vernier Mini GC uses a metal column with a nonpolar coating‚ called the stationary phase. A sample‚ consisting of one or more compounds‚ is injected into the column and is carried through the stationary phase by atmospheric air‚ which acts as the mobile phase. The nonpolar coating of the stationary phase most strongly retains solutes of the same polarity. Organic compounds flowing out of the chromatography column are then detected by a chemical sensor that produces electrical
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sinensis that can be found in tea bags? Introduction: Tea is an aromatic beverage commonly prepared by pouring hot or boiling water over cured leaves of the tea plant‚ Camellia sinensis. Tea likely originated in China as a medicinal drink. It is made by brewing tea leaves to create an extract‚ due to the chlorophylls and other pigments in the leaves‚ the color commonly appears brown. Statement of the Problem: In general‚ this project is aiming for finding out if tea bags can be used for alternative
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availability and the concentration of that nutrient. In the Barfing Bag experiment‚ our control group which was granulated sugar worked the best against splenda‚ artificial‚ and stevia which a sugar substitute that comes from a plant and has 0 calories. In the barfing bag experiment we had three bags with yeast and then we added different types of sugars to test which type of sugar creates the most carbon dioxide or which bag inflates the most. The bag that inflated the most with carbon dioxide was our control
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aerobic respiration (as well as water and heat). In this experiment Douglas bags were used to collect expired gas to be used for analytical purposes. Douglas bags enable readings of both carbon dioxide and oxygen to be taken with the use of a Servomex Analyser‚ as well as total gas content using a dry gas meter and pump. The analysis of these results can be used to determine the gross efficiency of an athlete‚ Douglas bags are used as a gold-standard approach due to their high reliability (Gregson
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Chemistry Ozone Depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth’s stratosphere (the ozone layer)‚ and a much larger springtime decrease in stratospheric ozone over Earth’s polar regions. The latter phenomenon is referred to as theozone hole. In addition to these well-known stratospheric phenomena‚ there are also springtime polartropospheric ozone depletion events. The
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(Name) (Course Name) (Instructors Name) (Date) Summary of chemistry lab report Introduction The two factors which affect the yield of products in a chemical reaction is the amount of starting materials (reactants) and the percent yield of the reaction. Many experimental conditions for example temperature‚ and pressure can be adjusted to increase yield of the desired product‚ in chemical reaction‚ but because chemicals react according to fixed mole ratios( stoichometrically)‚ the only limited
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Sains Malaysiana 41(4)(2012): 445-452 Effects of Spin Contamination on the Stability and Spin Density of Wavefunction of Graphene: Comparison between First Principle and Density Functional Methods (Kesan Pemumusan Spin Terhadap Kestabilan dan Ketumpatan Spin bagi Fungsi Gelombang Grafen pelumusan: Perbandingan antara Kaedah Prinsip Pertama dan Kaedah Kefungsian Ketumpatan) LEE SIN ANG*‚ SHUKRI SULAIMAN & MOHAMED ISMAIL MOHAMED-IBRAHIM ABSTRACT The effects of spin contamination on the
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Ase Ruth Alozie Chemistry Take home test May 4‚ 2013 In a laboratory experiment‚ a student reacted 2.8 grams of Fe (s) (steel wool) in excess CuSO4 (aq)‚ according to the following balanced equation: Fe(s) + CuSO4 (aq) -> FeSO4 + Cu(S). When the Fe(s) was completely consumed‚ the
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and protection for him and his caring friend. The washing hands expressing it own language about life. Aged hands show hardship and caring‚ gentle touch as well as laying on with hands to anoint his friend with water. The empty pockets and empty bags evoke our sympathy of all that they lost during war. They did not only loose their livelihood but also their dignity as human beings. Kneeling under the pressure of life without the ability to touch‚ however‚ in contrast he also kneels under the
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Introduction Amongst the myriad of literature on the issue of plastic bag usage‚ multiple perspectives have been brought up and discussed. In this critique‚ I will be highlighting some of these issues discussed and provide my analysis on the article. Summary of Key Issues In Singapore‚ it is commonplace to issue free plastic bags. As plastic is non-biodegradable‚ it causes pollution and consumes significant amounts of precious resources including petroleum and land. The manufacturing also produces
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