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94 results for “Dispersion”
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Research ArticleOpen accessIn the abstractHistorical Changes in Polychlorinated Biphenyls Contaminated SedimentsViet D. Dang, David M. Walters, Cindy M. LeeProblem statement: PCBs contamination continues to pose a health risk to aquatic environments due to their recalcitrance and bioaccumulation. The Sangamo Weston/Twelvemile Creek/Lake Hartwell Superfund Site is an example of such a health risk as a result of PCBs discharged from a former capacitor manufacturing plant. We conducted a study in twelvemile creek (Clemson, SC, USA) to examine the temporal … …American Journal of Environmental Sciences, Vol. 8, Issue 1 · 25 Jan 2012 · 7,077 accessesView PDFCite
Research ArticleOpen accessIn the abstractSeasonal Population Dynamics of the Asian Citrus Psyllid, Diaphorina citri Kuwayama in SarawakStephen Leong Chan Teck, Abang Fatimah, Andrew Beattie et al.Problem statement: Effective control of phytophagous pests requires a thorough understanding of their seasonal population dynamics, dispersion behavior, natural enemy activity and climate. To date, although very little detail information had been published on the ecology of Diaphorina citri. The objective of this investigation was to test through field experiment the hypothesis that the major factors influencing local D. citri … …American Journal of Agricultural and Biological Sciences, Vol. 6, Issue 4 · 27 Dec 2011 · 9,551 accessesView PDFCite
Research ArticleOpen accessIn the abstractParticulate Matter in the Excavation Work Sites in Urban AreasGiuseppe Pizzo, Marina ClericoProblem statement: Excavation work sites in urban areas for infrastructures and buildings cause a great deal of disturbance and damage due to the emission of particulate matter, in particular in the area involved in urban renovation work. Under Italian legislation limits currently exist for PM10 and PM2, 5 but, in the case of excavation work sites, it would be also … …American Journal of Environmental Sciences, Vol. 7, Issue 6 · 23 Dec 2011 · 6,825 accessesView PDFCite
Research ArticleOpen accessIn the abstractTransient MHD Mixed Double Diffusive Convection Along a Vertical Plate Embedded in a Non-Darcy Porous Medium with Suction or InjectionKhaled K. JaberProblem statement: Transient non-Darcy mixed double convection from a semi-infinite, isothermal vertical plate embedded in a homogeneous porous medium, in the presence of surface suction or injection had been numerically investigated. Approach: Forchheimer extension was considered in the flow equations. Appropriate transformations were employed to transform the derived partial differential equations governing the problem under consideration on the assumption of … …Journal of Mathematics and Statistics, Vol. 8, Issue 1 · 10 Dec 2011 · 7,121 accessesView PDFCite
Research ArticleOpen accessIn the abstractSlow Fungal Hydrolysis of Complex Sugar is Responsible for the Use of Sugar as Vehicle for Antifungal DrugsNedosa Ikenna Valentine, Utoh-Nedosa Uchechukwu Anastasia, Dan Danjuma et al.Problem statement: Aspergillus niger strain (UUF 9202) significantly reduced the dormancy period and boosted aggregate germination time in seeds of Tetrapleura tetraptera by 42% in 32 days and produced a net reduction in mean germination time of the seeds to 12 days. A structure-fungitoxicity relationship study of a series of isoflavonoids against Aspergillus niger and Cladosporium cucumerinum showed that a … …American Journal of Pharmacology and Toxicology, Vol. 6, Issue 3 · 2 Nov 2011 · 7,665 accessesView PDFCite
Research ArticleOpen accessIn the abstractOil Refineries Emissions Impact on Urban Localities Using AERMODAmira Mohamed Wahba Abdelrasoul, Amir AL-Hadad, Abdul Rehman KhanProblem statement: The absolute necessity of compulsory fuel utilities, no matter small or big has resulted into substantial high hazards pollutants. Petroleum refineries are major industrial installations that are necessary for providing the best suited fuel for various necessary utilities, but are responsible of the emission of several hazardous pollutants into the atmosphere. Hydrocarbons are among the most perilous air … …American Journal of Environmental Sciences, Vol. 6, Issue 6 · 31 Dec 2010 · 7,729 accessesView PDFCite
Research ArticleOpen accessIn the abstractImproving the Polypropylene-Clay Composite Using Carbon Nanotubes as Secondary FillerSalawudeen T. Olalekan, Suleyman A. Muyibi, Qasim H. Shah et al.Problem statement: Current researches have shown that the thermoplastic-clay nanocomposites have failed to live up to the earlier predictions albeit they have found some niche area of applications. This research work therefore aimed at studying the effect of carbon nanotube as secondary filler on the mechanical properties of polypropylene-clay nanocomposite. Approach: Hybrid polypropylene-clay nanocomposite was prepared in the presence of … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 8,668 accessesView PDFCite
Research ArticleOpen accessIn the abstractImproved Dielectric Model for Polyvinyl Alcohol-Water Hydrogel at Microwave FrequenciesYou Kok Yeow, Zulkifly Abbas, Kaida Khalid, Mohamad Zaki Abdul RahmanProblem statement: The study described rigorous dielectric modeling for Polyvinyl Alcohol (PVA)-water hydrogel mixture at microwave frequencies. Approach: A commercial open-ended coaxial sensor was used to measure the dielectric constant, loss factor and ionic conductivity, σ of PVA-water hydrogel mixture ranging concentration of 80-100% water content. Results: The sensor was operating between 0.13 and 20 GHz at and above of … …American Journal of Applied Sciences, Vol. 7, Issue 2 · 28 Feb 2010 · 9,045 accessesView PDFCite
Research ArticleOpen accessIn the abstractCompetitiveness and Prospects of Greek Asparagus: The European ContextArgyrios D. Kolokontes, Anastasios SemosProblem statement: The revisions and the anticipated abolition of CAP will change the agricultural structure in member states of EU. Although the asparagus, without government interventions, from the decade of 90' has been transformed at one of more promising, in exports terms, cultivation for Greece, however under the existing circumstances it has a doubtful future. Approach: This research studied the … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 7,170 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Information Overload on Brazilian E-ConsumersRafael Lucian, Salomão Alencar de FariasProblem statement: E-commerce is a reality; Companies must consider this media as an important trade channel without distances between products and consumers. A key issue of e-commerce is how companies are disclosing information to its customers. This study aims to measure if there is relationship between the information overload in the virtual environment and the response of satisfaction and confusion … …American Journal of Economics and Business Administration, Vol. 1, Issue 1 · 31 Mar 2009 · 7,737 accessesView PDFCite