Local Air Pollutants in Dallas‚ Texas Abstract Dallas‚ Texas has many challenges ahead to mitigate various hazardous pollutions. The top five pollutants are analyzed in this document to indicate the effects on the population and especially action taken ease pollution in its number one chemical‚ formaldehyde. It has become an increasing issue and has grown to have a profound effect as population grows supply and demand for fuels‚ foods‚ pesticides‚ hospital supplies etc. The demand is on the
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ABSTRACT The exercise was about the techniques in proper sectioning of plant tissues and staining techniques so that the study of plant structure will be easier. In free hand sectioning‚ the plant organ must be 45° upright and is held between the thumb and the base of the forefinger. A razor blade was used to cut the plant thinly in cross sections. Obliquely cut tissue is a big mistake since the surface of the tissue will not be even upon viewing under the microscope. Iodine-Potassium-Iodide
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Distillation of Alcohol Beverages Abstract Distillation is a process wherein a liquid is heated until its boiling point while the resultant hot vapors are subsequently captured and cooled‚ and the condensed vapors are collected. Among the many types of distillations‚ the fractional method or technique of distillation was used in this experiment. A step by step procedure was followed and an amount of 3.33 % of ethanol was obtained from the sample wine‚ Mateus Rose‚ which was used. Further
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suitable for heavier applications‚ such as draperies and furniture coverings. Modifications can be introduced in each of these varieties for obtaining specific properties. PET Polyester For manufacturing PET Polyester‚ the main raw material is ethylene derived from petroleum. It is oxidized to produce a glycol monomer dihydric alcohol which is further combined with another monomer‚ terephthalic acid at a high temperature in a vacuum. Polymerization‚ the chemical process that produces the finished
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guidelines of 15 ppb‚” (Grabianowski). Approximately 80% of all adult lead poisoning deaths have to do with consumption of moonshine (Grabianowski). Along with the lead troubles‚ radiators also contain traces of leftover antifreeze‚ which contains ethylene glycol‚ which is fatal (Devlin). Another popular place to produce illegal moonshine is in the woods (Devlin). This causes possible health risks due to the fact that it is in less than sterile conditions and the mash attracting all kinds of insects
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Importance of colloidal dispersion in pharmacy Pharmaceutical Applications of colloids: Colloids are extensively used for modifying the properties of pharmaceutical agents. The most common property that is affected is the solubility of a drug .However‚ colloidal forms of many drugs exhibits substantially different properties when compared with traditional forms of these drugs. Certain medicinals have been found to possess unusual or increased therapeutic properties when formulated in the colloidal
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Synthesis and Structure of Alcohols Alcohols can be considered organic analogues of water. H O H R O H Alcohols are usually classified as primary‚ secondary and tertiary. H R H OH H primary R R OH R R OH OH R secondary tertiary phenol Alcohols with the hydroxyl bound directly to an aromatic (benzene) ring are called phenols. Nomenclature of Alcohols (Normally any compound’s name which ends in –ol is an alcohol of some sort) IUPAC rules that:
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cells were suspended in four different solutions of NaCl (Sodium Chloride) and timed to see if and how long it would take for hemolysis to occur. In Part 4‚ blood suspension containing red blood cells was introduced to three solutions with 0.5mL of Ethylene Glycol‚ each measured at a different temperature(C)‚ and timed to see how many seconds hemolysis would take. Results of this lab do support the proposed hypotheses‚ as hemolysis did occur to the red blood cells introduced to both hypotonic
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2014-2017 Summary High barrier materials can block the penetration of small molecular gas (such as O2‚ CO2‚ N2‚ water vapor)‚ aroma and other organic solvent vapor prominently. By virtue of better barrier performance‚ polyvinylidene chloride (PVDC)‚ ethylene / vinyl alcohol copolymer (EVOH) and polyethylene naphthalate (PEN) are mainly used to produce thin films and containers‚ and utilized in such fields with higher requirements on barrier properties as food‚ medicine‚ military products‚ cosmetics‚
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Introduction The main purpose of root canal treatment is the elimination of microorganism from root canal system (1‚2). Microorganisms and their byproducts are regarded as the primary etiological factors of periapical diseases and pulpal necrosis (3‚4‚5). Microbial reduction obtained by mechanical instrumentation‚ irrigation‚ using intracanal medicaments and adequate filling of root canal (6). Failure of the root canal treatment is the result of persisting microorgansims in the root canal system
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