ppt_lewis_final[1].pptx - FORMULATION OF MOSQUITO REPELLENT...

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FORMULATION OF MOSQUITO REPELLENT CREAM SHISANYA DENNIS SCP222-1142/2015 SUPERVISOR PROF PATRICK KARERU
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Introduction and literature review. Volatile organic compounds (VOCs) are organic chemicals that have a high vapor pressure at ordinary room temperature. Their high vapor pressure results from a low boiling point, which causes large numbers of molecules to evaporate or sublimate from the liquid or solid form of the compound and enter the surrounding air, a trait known as volatility. VOCs are numerous, varied, and ubiquitous. They include both human-made and naturally occurring chemical compounds. Most scents or odors are of VOCs. VOCs play an important role in communication between plants, [1] and messages from plants to animals. Concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors. VOCs are emitted by a wide array of products numbering in the thousands.
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Sources of VOCs Household products, including: paints, paint strippers and other solvents wood preservatives aerosol sprays cleansers and disinfectants moth repellents and air fresheners stored fuels and automotive products hobby supplies dry-cleaned clothing Pesticide Other products, including: building materials and furnishings office equipment such as copiers and printers, correction fluids and carbonless copy paper graphics and craft materials including glues and adhesives, permanent markers and photographic solutions.
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Paints and coatings [ edit ] A major source of man-made VOCs are coatings, especially paints and protective coatings. Solvents are required to spread a protective or decorative
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  • Summer '16
  • jane murungi
  • Volatile organic compound

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