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74 articles for “column study”
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Research ArticleOpen accessIn the abstractA Model for Bioaccumulation of Metals in Crassostrea virginica from Apalachicola Bay, FloridaDennis A. Apeti, Elijah Johnson, Larry RobinsonKinetics of bioaccumulation of the trace metals (Cd and Zn) by C. virginica were investigated in this study. A computer program, Oyster Bioaccumulation Model (OBM), was developed to simulate the accumulation of the metals from both dissolved (water column) and particulate (food) phases by C. virginica. The model is based on two main attributes: (1) the oyster biological characteristics such … …American Journal of Environmental Sciences, Vol. 1, Issue 3 · 30 Sep 2005 · 7,474 accessesView PDFCite
Research ArticleOpen accessIn the abstractRelationships between Heavy Metal Concentrations in the American Oyster (Crassostrea virginica) and Metal Levels in the Water Column and Sediment in Apalachicola Bay, FloridaDennis A. Apeti, Larry Robinson, Elijah JohnsonThis study aims to assess baseline concentrations of heavy metals (Cd, Cr, Cu, Pb and Zn) in the oyster soft tissue as they relate to concentrations in the water column (particulate phase) and sediment in Apalachicola Bay. In order to conduct these assessments, a total of 360 samples, collected in two seasons (winter and summer) and were analyzed using atomic … …American Journal of Environmental Sciences, Vol. 1, Issue 3 · 30 Sep 2005 · 7,344 accessesView PDFCite
Research ArticleOpen accessIn the abstractInvestigating the Effect of Amount of Damage in Columns on Possible Occurrence of Collapsing in Flexural Frames under EarthquakeReza Salehi, Abbas Akbarpour Nikghalb RashtiConsidering the expansion of the field of study among the structural researchers regarding the structure behavior under different conditions, it would be a new research topic to assess structure behavior before earthquake, supposedly with preliminary deficiency or preliminary damage in elements. Man-made threats including gas cylinder explosion, intentional sabotage, or vehicle collision with the main elements of the building like … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 2 · 22 May 2018 · 8,052 accessesView PDFCite
InvestigationOpen accessIn the abstractEfficiency of the Insecticide Composition "Abifipr" at Melofagosis of SheepVladimir N. Domatsky, Andrey A. Nikonov, Nataliya I. Beletskaya, Anna N. SibenThe object of research is livestock animals, i.e., sheep (Ovis aries), agents of parasitic diseases of animals (Melophagus ovinus) and drugs used against myiasis of animals. The purpose of the work is to study the possibility of creation of an insecticide composition on the base of fipronil that will be efficient against the sheep ked and to determine its efficiency … …OnLine Journal of Biological Sciences, Vol. 18, Issue 1 · 27 Mar 2018 · 7,273 accessesView PDFCite
Review ArticleOpen accessIn the abstractRecognizing Dissolved Organic Matter with an Improved Fluorescence Regional Integral MethodZhang Jianguo, Wang Xinyi, Liu Xiaoman et al.The aim of this paper was to study transformations of Dissolved Organic Matter (DOM) in marl rock groundwater. To achieve this, we carried out a series of soil column experiments, using a DOM solution as the water sample and marl rock as the testing rock sample. Three-Dimensional Excitation-Emission Matrix Spectra (3DEEMS) were generated for DOM solutions and the Analytic Hierarchy … …American Journal of Biochemistry and Biotechnology, Vol. 15, Issue 4 · 24 Dec 2019 · 7,288 accessesView PDFCite
Research ArticleOpen accessIn the abstractSequence Stratigraphic Analysis from Well Logs of an X-Field, Niger Delta, NigeriaGodwin Omokenu Emujakporue, Alphonsus Joseph EyoThe sequence stratigraphic analysis of the area was studied using well log information in order to determine the lithostratigraphy, chronostratigraphy, possible reservoir sands, age and depositional environment of the study area for opportunities that will support exploration program. The depositional environment penetrated by the wells interpreted from log signatures gave three major facies association. The blocky and coarsening upward (funnel … …Current Research in Geoscience, Vol. 6, Issue 2 · 11 Jul 2016 · 13,975 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalytical Estimation of Geotherm for Multi Layer Model from Heat Flow Equation: A Case Study of Parts of Chad Sedimentary Basin, NigeriaEmujakporue Godwin OmokenuThe subsurface temperature distribution of part of Chad sedimentary basin has been determined by applying analytical solution for multi-layer-model in solving the 1-D steady state conductive heat flow equation. Four-layer model was adopted because the Chad basin is made up of four lithostratigraphies. In this model, equilibrium geotherm of the four layers was computed by considering each layer separately while … …Physics International, Vol. 7, Issue 2 · 6 Oct 2017 · 8,314 accessesView PDFCite
Research ArticleOpen accessIn the abstractStatistical Improvement of Batch Culture with Immobilized Pichia pastoris Cells for rPOXA 1B Laccase ProductionMichelle Gouzy-Olmos, Luis M. Cháves-Tequia, María F. Rojas-Fajardo et al.Immobilized Pichia pastoris X33/pGAPZαA-LaccPost-Stop in Ca2+ alginate beads was employed for Pleurotus ostreatus rPOXA 1B laccase batch production. Sequential statistical improvement was achieved through Plackett-Burman (PBED), (PBED-T11, 29.5±0.8 UL-1), which allowed to increase activity by 2.36-fold (12.5±2.6 UL-1) obtained in a preliminary study. Following, Box-Behnken Experimental Design (BBED) was implemented and obtained enzymatic activity in PBED-T11 was further increased by … …American Journal of Biochemistry and Biotechnology, Vol. 14, Issue 2 · 26 Apr 2018 · 11,776 accessesView PDFCite
InvestigationOpen accessIn the abstractInvestigating the Parameters Influencing the Behavior of Knee Braced Steel StructuresEdris Farokhi, Mehrdad GordiniIn Knee-Braced Frames (KBF), the brace is connected to the knee element rather than the beam-column joint. For reasons such as having sufficient lateral stiffness despite its adequate ductile behavior, the concentration of damage in the Double Knee-Braced structural elements and also ease of repair and replacement of these elements after an earthquake, this bracing system is preferred over conventional … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 4 · 21 Sep 2015 · 7,808 accessesView PDFCite
Research ArticleOpen accessIn the abstractBioactive Endophytic Actinomycetes of Cinnamomum sp.; Isolation, Identification, Activity Guided Purification and Process Optimization of Active MetaboliteSudipta Roy, Debdulal BanerjeeStudying on endophytic actinomycetes of Cinnamomum sp. from Indian rainforest, Cherapunji, one of our isolated strains designated as CH1 was found to produce significant antibacterial activity against test pathogens (Aeromonas caviae (ATCC 15468), Vibrio parahemolyticus ATCC 1782, Pseudomonas aeruginosa (ATCC 9027), Proteus vulgaris (ATCC 12453), Shigella flexnerii (ATCC 12022), Escherichia coli (human sample isolate), Bacillus subtilis (ATCC 11774) and Bacillus … …Current Research in Microbiology, Vol. 6, Issue 1 · 6 Apr 2015 · 9,062 accessesView PDFCite