Atmosphere This article is about the general term "atmosphere". For specific information about the Earth’s atmosphere‚ see Atmosphere of Earth. For other uses‚ see Atmosphere (disambiguation) View of Jupiter’s active atmosphere‚ including the Great Red Spot. An atmosphere (New Latin atmosphaera‚ created in the 17th century from Greek ἀτμός [atmos] "vapor"[1] and σφαῖρα [sphaira] "sphere"[2]) is a layer ofgases surrounding a planet or other material body of sufficient mass[3] that is held in place
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1. Introduction Plumbago zeylanica L. belonging to the family Plumbaginaceae is an important plant of medicinal value. In the Arabian Peninsula‚ it is mainly distributed over Oman‚ Yemen and the Southwestern region of Saudi Arabia. The use of the roots of P. zeylanica for treating skin problems has been recorded by early Muslim physicians. P. zeylanica is greatly valued in Ayurveda for treatment of cough‚ asthma and gastrointestinal disorders. In Sushrutha Samhitha it has been described as antiseptic
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(2) [Co(en)2 Cl 2]+ (3) [Co(NH3)3 Cl3] (4) [Co(en) (NH3)2Cl2]+ Ans. (3) 32. Which one of the following molecules is expected to exhibit diamagnetic behaviour ? (2) N2 (1) C2 (3) O2 (4) S2 Ans. (2) 33. A solution of (–) –1–chloro–1–phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5‚ due to the formation of :(1) carbanion (2) Carbene (3) carbocation (4) free radical Ans. (3) 34. Given : 31. E0 Cr 3 / Cr The molarity of a solution obtained by mixing 750 mL of 0
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maintain the wells‚ the gas has to be released. Venting is one of the greatest problems with fracking. The process of venting the gases releases methane and possibly “other hydrocarbons such as ethane‚ propane‚ butane‚ and pentanes as well as benzene‚ toluene‚ ethylbenzene‚ xylenes and hexanes‚ hydrogen sulfide (H2S)‚ and carbon dioxide” (Air 6 Pollution and Fracking 21). Another technique used when drilling for gas is flaring‚ burning of dangerous or useless gases. This also contaminates the air by
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COLUMN AND THIN LAYER CHROMATOGRAPHY Group 9 RAMOS‚ Sharina Joy; REYES Aina Marie; REYES Jallisa Maan; RUBIO‚ John Michael; SABINO Patricia Anne; SANTOS‚ Carlos Rafael ABSTRACT To separate the colored components of siling labuyo and to determine the purity of the components‚ the students performed a column and thin or solid-liquid chromatography procedure. The solid may be almost any material that does not dissolve in liquid phase. But for this experiment‚ the solid used by the students was
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have already been documented and citizen’s well waters have been tainted with toxic chemicals"‚ according to the Climate Progress. (Foster) Many of the chemicals used in the fracking process are proven toxins. These include benzene‚ ethyl-benzene‚ toluene‚ xylene‚ naphthalene‚ and other hazardous chemicals that are harmful if any contact is made. For these reasons‚ fracking in the United States should be halted. All around the United States‚ there are areas where the drilling takes place. Everywhere
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One-Step Fabrication of Supramolecular Microcapsules from Microfluidic Droplets Jing Zhang‚ et al. Science 335‚ 690 (2012); DOI: 10.1126/science.1215416 If you wish to distribute this article to others‚ you can order high-quality copies for your colleagues‚ clients‚ or customers by clicking here. Permission to republish or repurpose articles or portions of articles can be obtained by following the guidelines here. The following resources related to this article are available online at
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a liquid (mobile phase) at high pressure. HPLC is historically divided into two different sub-classes based on the polarity of the mobile and stationary phases. Technique in which the stationary phase is more polar than the mobile phase (e.g. toluene as the mobile phase‚ silica as the stationary phase) is called normal phase liquid chromatography (NPLC) and the opposite (e.g. water-methanol mixture as the mobile phase and C18 = octadecylsilyl as
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World Academy of Science‚ Engineering and Technology 72 2010 Preparation and Some Mechanical Properties of Composite Materials Made from Sawdust‚ Cassava Starch and Natural Rubber Latex Apusraporn Prompunjai*‚ Waranyou Sridach The performance and stability of sawdust-reinforced composite materials depends on the development of coherent interfacial bonding between sawdust and matrix. The general components of sawdust are cellulose‚ hemicellulose‚ lignin‚ pectin‚ waxes‚ and water-soluble substances
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J Polym Environ (2007) 15:25–33 DOI 10.1007/s10924-006-0042-3 ORIGINAL PAPER Chemical Treatments of Natural Fiber for Use in Natural Fiber-Reinforced Composites: A Review Xue Li Æ Lope G. Tabil Æ Satyanarayan Panigrahi Published online: 4 January 2007 Ó Springer Science+Business Media‚ LLC 2006 Abstract Studies on the use of natural fibers as replacement to man-made fiber in fiber-reinforced composites have increased and opened up further industrial possibilities. Natural fibers have
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