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Showing 1 to 20 of 153 for “"cec"”.
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Perfil plasmático da ICAM-1 e da VCAM-1 no pós-operatório cardíaco de lactentes submetidos à circulação extracorpórea
… pelo período de circulação extracorpórea (CEC), o que provoca disfunção de órgãos e tecidos. Os neutrófilos assumem um papel importante e complexo neste período, envolvendo a ligação às células endoteliais, ativação e liberação de mediadores inflamatórios. Esse processo é iniciado e mantido …
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A study of the pH-dependent charge of a selection of highly weathered humic soils
… to be a reduction in cation exchange capacity (CEC). At the same time the reduction in CEC would result in a decline in the soil's ability to retain cations. The reduction in CEC is said to result from the development of positive charge at low pH in soils with variable charge which is enhanced …
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SUSTAINABLE FACE MILLING OF INCONEL 718 USING MQL AND NANOFLUIDS MQL WITH VEGETABLE OIL AS BASE FLUID
… surface integrity). Conventional flood coolant (CEC) used in industry is environmentally unfriendly, hazardous to operators, and unsustainable. These problems motivated this research, which can be mitigated with the use of effective biodegradable cutting fluids, appropriate cutting conditions, …
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Evaluation of the potential of Zeolite as a soil conditioner for two Zambian Soils
… each amended with zeolite to effect increases in CEC by 0, 25, 50, 75, 100 and 125%. The mixtures were placed in pots and allowed to equilibrate for a period of six weeks, and thereafter soil moisture retention and CEC were determined. ii) In the second experiment, the agronomic performance of …
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Evaluation of the potential of Zeolite as a soil conditioner for two Zambian Soils
… each amended with zeolite to effect increases in CEC by 0, 25, 50, 75, 100 and 125%. The mixtures were placed in pots and allowed to equilibrate for a period of six weeks, and thereafter soil moisture retention and CEC were determined. ii) In the second experiment, the agronomic performance of …
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SYNTHESIS AND CHARACTERIZATION OF MODEL AQUATIC PARTICULATES FOR USE IN SORPTION STUDIES
… measurement of cation exchange capacity (CEC), and attempts to determine surface area and the pH of zero point of charge. Each of these methods was tested to determine their applicability to aquatic particulates, and attempts were made to improve the methodology.</p><p>CEC varied with …
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Enhanced removal of emerging contaminants during managed aquifer recharge using optimized operating conditions
… including chemicals of emerging concerns (CECs) is needed. The objectives of this study were to determine the role of sorption to clays in CEC removal during MAR, identify the effect of biodegradable dissolved organic carbon (BDOC) and its relationship with redox states on CEC attenuation, …
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Steric Effects of Alkyl Ammonium Salts on the Combustion of Exchanged Smectite Clays
… for determining the cation exchange capacity (CEC) of clays. Smectite clays were modified with several alkyl ammonium salts varying in number of carbons and the spatial orientation of the carbons about the central nitrogen atom. The clays used, standards purchased from the Source Clay …
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The effect of soil parameters on the bioavailability and retention of lead in rats
… between soil cation exchange capacity (CEC) and soil amendments (lime and phosphate) to the retention of lead in soil fed to rats. This study also related the amount of lead that can be extracted from in situ contaminated soils from a secondary smelter site to both soil properties and to …
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Analytical separations using packed and open-tubular capillary electrochromatography
… packed mode of capillary electrochromatography (CEC) and a 40 cm packed bed of Reliasil 3 μm C<sub>18</sub> stationary phase. Optimal conditions were established by varying the mobile phase, the amount of organic modifier, the buffer concentration, the applied voltage, and the column temperature. …
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The modeling and analysis of the electroosmotic flow, diffusion, electrophoretic migration, and adsorption mechanisms of charged and uncharged adsorbates in capillary electrochromatography systems employing charged adsorbent particles - comparisons between theory and experiments
… employed in capillary electrochromatography (CEC) and ion exchange systems are modeled, studied, and analyzed. The modelling of these mechanisms has put the analysis of the dynamic behavior of CEC systems to now be based on fundamental scientific understanding and, thus, the design and …
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Controlled English Commenting System
… of a Controlled English Commenting (CEC) system that aids a VHDL modeler in entering controlled English comments. The CEC system developed includes a graphical user interface (GUI). The interface permits a modeler to submit comments for insertion at user selected points in a text file …
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Characterization of soils via portable X-ray fluorescence spectrometer
… Soil pH and soil cation exchange capacity (CEC) are two of the important soil properties that cannot be disregarded when considering the quality of soil. Current methods for evaluating these properties are arduous and require laboratory analysis. Laboratory approaches, while accurate, are …
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Acoustically optimized propulsion systems using a Cause-Effect Controller
… (ARCP) allows for a "Cause- Effect" Controller (CEC) to provide a method to optimize the trade-off between a marine vessel's ability to maneuver and the radiated acoustic noise (or internal vibrations). Through the discretization of both a marine vessel's motion and all possible configurations …
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Nanofiltration Rejection of Contaminants of Emerging Concern from Municipal Water Resource Recovery Facility Secondary Effluents for Potable Reuse Applications
… upcycling of contaminants of emerging concern (CECs) could prove harmful to human health and aquatic species if more effective and robust treatment barriers are not in place.</p> <p>There are no federal Safe Drinking Water Act (SDWA) regulations in place specifically for direct potable reuse …
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Development and applications of electrically-driven separation methods.
… alternative mobile phases for application in CEC. Several solvents were found to support a rapid EOF even without the presence of a supporting electrolyte. These initial experiments led to the development of a separation involving an active pharmaceutical ingredient (Cimetidine) and a series …
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Effect of peat solidification on macronutrients in soils associated with palm oil plantation in peat area
… were analysed using cation exchange capacity (CEC) and water mass balance model for element holding in peat. The results gave pH values of 3.8, 5.3 and 4.9 for fibric, hemic and sapric respectively. The concentration NO-3 in water leachate for dry and wet season were 9 mg/L to 72 mg/L and 3 …
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Fate and remediation of emerging organic contaminants in aquatic and soil environments
… of nine contaminants of emerging concern (CEC) on both the microbial community structure and CEC degradation in agricultural soil. Results show soil microbial community composition is strongly impacted by different TEAPs but no significant change upon exposure to the mixture of CEC. Two of …
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Alteration of dioctahedral micas in soils
… of K (also Na in certain cases), increase in CEC, and expansion characteristics. Boiling treatments with several different solutions were used to promote artificial weathering. In terms of the three parameters of primary interest, the results were of three general types, depending upon the …
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Literacy Based Behavioral Interventions: A Review of the Literature
… by the Council for Exceptional Children (CEC). There were eight main categories of standards which included 1) context, 2) participant characteristics, 3) description of the intervention, 4) how it was implemented, 5) if the implementation had fidelity and 6) validity, 7) outcome measures, …
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