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264 results for “Degradation”
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Research ArticleOpen accessIn the abstractPesticide-Tolerant Bacteria Isolated from Agricultural Canals in the Lower Rio Grande Valley of South TexasSandra Puente Aguirre, Kristine L. LoweAtrazine and oxamyl are commonly-used pesticides in the Lower Rio Grande Valley of South Texas. Problem statement: Pesticides may become environmental contaminants due to overuse, runoff and other mechanisms and may impact non-target organisms and ecosystems. Pesticides may be degraded by indigenous microorganisms or by abiotic means. In this study, waterborne bacteria from agricultural canals were examined to assess potential … …OnLine Journal of Biological Sciences, Vol. 10, Issue 3 · 30 Sep 2010 · 7,611 accessesView PDFCite
Research ArticleOpen accessIn the abstractFirm's Environmental Performance: A Review of Their DeterminantsAmir Hossein Montazer Hojat, Khalid Abdul Rahim, Lee ChinProblem statement: The role of environment in global economic development is vital since it is the life-support system providing sources of food and water, pleasant surroundings and sceneries and transportation lines. Firms’ environmental performances are of high interest in worldwide environmental protection. Approach: Many factors affect firms’ environmental performance. Some of these are of external origin while others are of … …American Journal of Economics and Business Administration, Vol. 2, Issue 3 · 30 Sep 2010 · 8,232 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Age and Postmortem Time on Some White-Tailed Deer (Odocoileus virginianus texanus) Epididymal Sperm Characteristics and Response of CryopreservationJ. Ake-Lopez, E. Cavazos-Arizpe, J. G. Magana-Monforte et al.Problem statement: Males rather than females of the White-Tailed deer (Odocoileus virginianus texanus) are more susceptible to hunting because their physical characteristics, therefore their elimination can increase a genetic degradation and a lower productivity because of the effect of gender. Thus, the aim of the current study was to evaluate the effect of age and postmortem time of White-Tailed deer … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 3 · 30 Sep 2010 · 7,626 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Converting Secondary Tropical Peat Swamp Forest into Oil Palm Plantation on Selected Peat Soil Physical PropertiesMohd Suffian Firdaus, Seca Gandaseca, Osumanu Haruna Ahmed, Nik Muhamad Ab. MajidProblem statement: The conversion of forest land into oil palm plantation is considered to be one of the causes of soil degradation and loss of tropical land forest in Southeast Asia. The objective of this study was to compare selected peat soil physical properties of secondary tropical peat swamp forest and oil palm plantation to determine the effect of forest … …American Journal of Environmental Sciences, Vol. 6, Issue 4 · 31 Aug 2010 · 8,749 accessesView PDFCite
Research ArticleOpen accessIn the abstractImpact of Mercury Mine Activities on Water Resources at Azzaba-North-East of AlgeriaFadila Alligui, Abdelhak BoutalebProblem statement: Mercury mineralization occurred in Azzaba (north-eastern Algeria) as a part of mercurial Numidian belt, consists of numerous of Hg deposits (Koudiat Sma, Mrasma, Guenicha, Fendek, Ismail and Ras Elma). These deposits are hosted in a variety of lithologies including sandstone, limestone, breccias and conglomerate. The ores occur as cinnabar deposits in Ypresian-Lutetian formations. Although the quantity and type … …American Journal of Environmental Sciences, Vol. 6, Issue 4 · 31 Aug 2010 · 7,498 accessesView PDFCite
Research ArticleOpen accessIn the abstractVoltage Oriented Control Applied to a Grid Connected Photovoltaic System with Maximum Power Point Tracking TechniqueRym Marouani, Abdelkader MamiProblem statement: This study presented a grid connected photovoltaic system with voltage oriented control. This system contains the problem of degradation of photovoltaic power with climatic factors and the problem of synchronization of currents to be injected to the grid. Approach: In order to optimize the photovoltaic energy generation, we developed a new maximum power point tracking algorithm and we … …American Journal of Applied Sciences, Vol. 7, Issue 8 · 31 Aug 2010 · 8,698 accessesView PDFCite
Research ArticleOpen accessIn the abstractSynthesis and Characterization of Silver/Polyvinilpirrolidone (Ag/PVP) Nanoparticles Using Gamma Irradiation TechniquesShawkat Salameh Gasaymeh, Shahidan Radiman, Lee Yook Heng et al.Problem statement: In this study, attempts had been made to synthesize silver (Ag)/Poly Vinylpyrolidone (PVP) nanoparticles by ionizing radiation and at the same time overcoming some of the disadvantages previously reported by other methods such as impurities, solvent toxicity, size and distribution control and difficulty in their preparation that limits their commercialization potential. Approach: The use of this alternative method … …American Journal of Applied Sciences, Vol. 7, Issue 7 · 31 Jul 2010 · 9,973 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Flavomycin on Ruminal Fermentation, In Situ Degradability and In Vivo Digestibility in Bovine Fed Sugarcane DietsS.M. Mogentale, E.J.A. Silva, P.M. Meyer et al.Problem statement: The aim of the present study was to characterize and differentiate the effects of addition of flavomycin or monensin on ruminal fermentation and degradability as well as on total digestibility in bovine. Approach: Twelve non-pregnant and non-lactating cows (736 kg of BW) were randomly assigned to three treatments: control, flavomycin (20 mg animal-1 day-1) and monensin (300 mg … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 8,374 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Total Ionizing Dose on Bipolar Junction TransistorChee Fuei Pien, Haider F. Abdul Amir, Saafie Salleh, Azali MuhammadProblem statement: The amount of ionizing radiation that Bipolar Junction Transistor (BJT) devices encounter during their lifecycle degrades both of their functional and electrical parameter performances. The different radiation environments either in space, high energy physics experiments, nuclear environment or fabrication process as well as for standard terrestrial operation possess an impact on the devices. Approach: In this research, analytical … …American Journal of Applied Sciences, Vol. 7, Issue 6 · 30 Jun 2010 · 8,316 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffective Factors in Achieving Sustainable AgricultureTahereh Sharghi, Hassan Sedighi, Abdolreza Roknoddin EftekhariProblem statement: The indiscriminate use of chemical inputs led to severe degradation of resources in Iran. Therefore, considering the increasing population and growing demand of agricultural products, it seems necessary to achieve a sustainable agriculture. In this study, sustainable agriculture refers to a kind of agriculture which is ecologically appropriate, economically justifiable, and socially desirable. Approach: There were two objectives … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 8,229 accessesView PDFCite