"Polycyclic aromatic hydrocarbon" Essays and Research Papers

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    Oregano

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    erectly spreading plant has strong aromatic characteristics‚ with leaves and stems that are fleshy. The leaves of oregano are heart-shaped‚ with toothed edges‚ and which‚ grow for up to 9 meters in length. In other countries‚ the plant is primarily used as a culinary ingredient. However‚ in countries like the Philippines‚ Oregano is a known herbal medicine for its strong anti-oxidant properties. Plant family:  Lamiaceae (mint family). Sensoric quality:  Aromatic‚ warm and slightly bitter. Oregano

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    Soap Essay

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    salts by the base. In addition to soap‚ this chemical reaction produces glycerin. Soap has the general chemical formula RCOOX. The X represents an alkali metal‚ an element in the first column on the periodic table of elements. The R represents a hydrocarbon chain composed of a line of anywhere from 8-22 carbon atoms bonded together and surrounded by hydrogen atoms. An example of a soap molecule is sodium palmitate (C16). How Is Soap Made? Before the end of World War II‚ soap was manufactured by a

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    to be 41.95%. The melting point range obtained from the final product was 89-91°C which was much lower than the literature value of 160-163°C. The peaks from the IR showed the formation of an alcohol group at 3460 wavenumbers and the presence of aromatic rings at 1600 and 1490 wavenumbers which confirms the successful formation of triphenylmethanol. Introduction: The Grignard reagent is an effective reducing agent that may be used to reduce a ketone to an alcohol. Generally‚ the Grignard reagent

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    Coloring Agent

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    It has the appearance of a reddish-blue powder. It is soluble in water‚ and the solution has a maximum absorption at about 628 nanometer. ------------------------------------------------- Chemistry It is a synthetic dye produced using aromatic hydrocarbons from petroleum.[1] It can be combined with tartrazine (E102) to produce various shades of green. It is usually a disodium salt. The diammonium salt has CAS number [2650-18-2]. Calcium and potassium salts are also permitted. It can also appear

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    1,3,5-Trimethylbenzene

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    chemical compound 1‚3‚5-Trimethylbenzene‚ or Mesitylene‚ behaves thermodynamically. Introduction: 1‚3‚5-Trimethylbenzene (1‚3‚5-TMB) is a hydrocarbon commonly known as Mesitylene‚ Symmetrical trimethylbenzene‚ or sym-trimethylbenzene. Mesitylene is an organic synthetic‚ or man-made‚ liquid that is clear and colorless with a distinctive‚ aromatic‚ and pleasant odor. Its molecular weight is 120.2 grams per mole and the molecular formula is C6H3(CH3)3 (“CDC” 1). This chemical compound has three

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    Doit

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    that are feasible‚ quick‚ and deployable in a wide range of physical settings. Government‚ industry‚ and the public now recognize the potential dangers that complex chemical mixtures such as total petroleum hydrocarbons (TPH)‚ polychloro biphenyls (PCBs)‚ polycyclic aromatic hydrocarbons (PAHs)‚ heavy metals‚ and pesticides pose to human health and the environment. In response to a growing need to address environmental contamination‚ many remediation technologies have been developed to treat

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    Rice ( Oryza sativa)‚ the staple food of the Filipinos‚ is the major crop produced in the country. Philippines being the 8th top rice producer in the world‚ has 4.5 million hectares of land producing rice yields with an average of 3.59 tons of rice grains per hectare. With such great number‚ the country has available supply of food source. The enormous amount grains will provide the necessity and needs of the country. However‚ what happens with the plant body the grain was took off? What do farmers

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    Synthesis of Banana Flavor

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    long as the proper acidic conditions are present. Keywords: Esterification‚ Reflux‚ Extraction‚ Esters‚ Isopentyl acetate Introduction Esters have the general formula of R’COOR‚ in which R’ can be H‚ an alkyl or an aromatic hydrocarbon group and R is an alkyl or an aromatic hydrocarbon group (Bettelheim et al.‚ 2007). The volatile compounds in natural fruits and flowers are usually complex mixtures of compounds‚ where esters frequently predominate. Many artificial flavorings contain esters or mixtures

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    John W Cherry

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    Occupational Medicine 2009;59:96–100 doi:10.1093/occmed/kqn172 IN-DEPTH REVIEW ............................................................................................................................................................................................... Reducing occupational exposure to chemical carcinogens John W. Cherrie .................................................................................................................................................

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    Văn Mạnh Hùng BTBTIU12029 Nguyễn Huy Hoàng BTBTIU12039 Lê Tâm Trí BTBTIU12026 INTRODUCTION WHAT IS AN OIL SPILL? An oil spill is the discharge of a liquid petroleum hydrocarbon into the environment‚ especially marine areas‚ due to human activities‚ and is one form of pollution. An oil spill occurs when a vehicle‚ vessel‚ pipeline or drilling rig releases petroleum products into the environment uncontrollably. The first

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