The Experts below are selected from a list of 75024 Experts worldwide ranked by ideXlab platform
Susan E Ebeler - One of the best experts on this subject based on the ideXlab platform.
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multiresidue determinatIon of pesticides in malt beverages by capillary gas chromatography with mass spectrometry and selected Ion monitoring
Journal of Agricultural and Food Chemistry, 2004Co-Authors: Jon W Wong, Michael G Webster, Dawit Z Bezabeh, Mathew J Hengel, Kenley K Ngim, Alexander J Krynitsky, Susan E EbelerAbstract:A method was developed to determine pesticides in malt beverages using solid phase extractIon on a polymeric cartridge and sample cleanup with a MgSO4-topped aminopropyl cartridge, followed by capillary gas chromatography with electron impact mass spectrometry in the selected Ion monitoring mode [GC-MS(SIM)]. Three GC injectIons were required to analyze and identify organophosphate, organohalogen, and organonitrogen pesticides. The pesticides were identified by the retentIon times of peaks of the Target Ion and qualifier-to-Target Ion ratios. GC detectIon limits for most of the pesticides were 5−10 ng/mL, and linearity was determined from 50 to 5000 ng/mL. FortificatIon studies were performed at 10 ng/mL for three malt beverages that differ in properties such as alcohol content, solids, and appearance. The recoveries from the three malt beverages were greater than 70% for 85 of the 142 pesticides (including isomers) studied. The data showed that the different malt beverage matrixes had no significant effe...
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multiresidue pesticide analysis in wines by solid phase extractIon and capillary gas chromatography mass spectrometric detectIon with selective Ion monitoring
Journal of Agricultural and Food Chemistry, 2003Co-Authors: Jon W Wong, Michael G Webster, Mathew J Hengel, Kenley K Ngim, Catherine Halverson, Susan E EbelerAbstract:A method was developed to determine pesticides in wines. The pesticides were extracted from the wine using solid-phase extractIon on a polymeric cartridge, and the coextractives were removed with an aminopropyl−MgSO4 cartridge. Analysis was performed using capillary gas chromatography with electron impact mass spectrometric detectIon in selective Ion monitoring mode (GC-MSD/SIM). Three injectIons are required to analyze all 153 organohalogen, organonitrogen, organophosphate, and organosulfur pesticides and residues. Pesticides were confirmed by retentIon times of the Target Ions and three qualifier-to-Target Ion ratios. DetectIon limits for most of the pesticides were less than 0.005 mg/L, and quantitatIon was determined from approximately 0.01 to 5 mg/L. Spike recoveries were performed by fortifying red and white wines at 0.01 and 0.10 mg/L. At the 0.01 ppm level, the spike recoveries were greater than 70% for 116 and 124 pesticides (out of 153) in red and white wines, respectively, whereas at the higher...
Jon W Wong - One of the best experts on this subject based on the ideXlab platform.
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multiresidue determinatIon of pesticides in malt beverages by capillary gas chromatography with mass spectrometry and selected Ion monitoring
Journal of Agricultural and Food Chemistry, 2004Co-Authors: Jon W Wong, Michael G Webster, Dawit Z Bezabeh, Mathew J Hengel, Kenley K Ngim, Alexander J Krynitsky, Susan E EbelerAbstract:A method was developed to determine pesticides in malt beverages using solid phase extractIon on a polymeric cartridge and sample cleanup with a MgSO4-topped aminopropyl cartridge, followed by capillary gas chromatography with electron impact mass spectrometry in the selected Ion monitoring mode [GC-MS(SIM)]. Three GC injectIons were required to analyze and identify organophosphate, organohalogen, and organonitrogen pesticides. The pesticides were identified by the retentIon times of peaks of the Target Ion and qualifier-to-Target Ion ratios. GC detectIon limits for most of the pesticides were 5−10 ng/mL, and linearity was determined from 50 to 5000 ng/mL. FortificatIon studies were performed at 10 ng/mL for three malt beverages that differ in properties such as alcohol content, solids, and appearance. The recoveries from the three malt beverages were greater than 70% for 85 of the 142 pesticides (including isomers) studied. The data showed that the different malt beverage matrixes had no significant effe...
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multiresidue pesticide analysis in wines by solid phase extractIon and capillary gas chromatography mass spectrometric detectIon with selective Ion monitoring
Journal of Agricultural and Food Chemistry, 2003Co-Authors: Jon W Wong, Michael G Webster, Mathew J Hengel, Kenley K Ngim, Catherine Halverson, Susan E EbelerAbstract:A method was developed to determine pesticides in wines. The pesticides were extracted from the wine using solid-phase extractIon on a polymeric cartridge, and the coextractives were removed with an aminopropyl−MgSO4 cartridge. Analysis was performed using capillary gas chromatography with electron impact mass spectrometric detectIon in selective Ion monitoring mode (GC-MSD/SIM). Three injectIons are required to analyze all 153 organohalogen, organonitrogen, organophosphate, and organosulfur pesticides and residues. Pesticides were confirmed by retentIon times of the Target Ions and three qualifier-to-Target Ion ratios. DetectIon limits for most of the pesticides were less than 0.005 mg/L, and quantitatIon was determined from approximately 0.01 to 5 mg/L. Spike recoveries were performed by fortifying red and white wines at 0.01 and 0.10 mg/L. At the 0.01 ppm level, the spike recoveries were greater than 70% for 116 and 124 pesticides (out of 153) in red and white wines, respectively, whereas at the higher...
F Reimold - One of the best experts on this subject based on the ideXlab platform.
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solps 5 0 simulatIons of the high field side divertor detachment of l mode plasmas in asdex upgrade with convectIon dominated radial sol transport
Nuclear materials and energy, 2019Co-Authors: J Karhunen, M Groth, D Coster, D Carralero, L Guimarais, V Nikolaeva, S Potzel, T Putterich, F ReimoldAbstract:Abstract SOLPS 5.0 simulatIons assuming convectIon-dominated radial Ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditIons for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density regIon in the HFS divertor volume across the separatrix into the core enables spatial extensIon of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed Ion fuelling from this regIon into the core plasma allows increasing the neutral D2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the Target Ion flux and as reproductIon of the characteristic roll-over behaviour of the integrated Target Ion current at increasing upstream density.
D Carralero - One of the best experts on this subject based on the ideXlab platform.
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solps 5 0 simulatIons of the high field side divertor detachment of l mode plasmas in asdex upgrade with convectIon dominated radial sol transport
Nuclear materials and energy, 2019Co-Authors: J Karhunen, M Groth, D Coster, D Carralero, L Guimarais, V Nikolaeva, S Potzel, T Putterich, F ReimoldAbstract:Abstract SOLPS 5.0 simulatIons assuming convectIon-dominated radial Ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditIons for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density regIon in the HFS divertor volume across the separatrix into the core enables spatial extensIon of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed Ion fuelling from this regIon into the core plasma allows increasing the neutral D2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the Target Ion flux and as reproductIon of the characteristic roll-over behaviour of the integrated Target Ion current at increasing upstream density.
Vijai P Bharathy - One of the best experts on this subject based on the ideXlab platform.
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effect of titanium incorporatIon on the structural mechanical and biocompatible properties of dlc thin films prepared by reactive biased Target Ion beam depositIon method
Applied Surface Science, 2010Co-Authors: Vijai P Bharathy, D Nataraj, Paul K Chu, Huaiyu Wang, Q Yang, M S R N Kiran, Joaquin Silvestrealbero, D MangalarajAbstract:Abstract Amorphous diamond like carbon (DLC) and titanium incorporated diamond like carbon (Ti-DLC) thin films were deposited by using reactive-biased Target Ion beam depositIon method. The effects of Ti incorporatIon and Target bias voltage on the microstructure and mechanical properties of the as-deposited films were investigated by means of X-ray photoelectron spectroscopy, Raman spectroscopy, transmissIon electron microscopy and nano-indentatIon. It was found that the Ti content in Ti-DLC films gets increased with increasing Target bias voltage. At about 4.2 at.% of Ti, uniform sized well dispersed nanocrystals were seen in the DLC matrix. Using FFT analysis, a facility available in the TEM, it was found that the nanocrystals are in cubic TiC phase. Though at the core, the incorporated Ti atoms react with carbon to form cubic TiC; most of the surface exposed Ti atoms were found to react with the atmospheric oxygen to form weakly bonded Ti–O. The presence of TiC nanocrystals greatly modified the sp3/sp2 hybridized bonding ratio and is reflected in mechanical hardness of Ti-DLC films. These films were then tested for their biocompatibility by an in vitro cell culturing test. Morphological observatIon and the cell proliferatIon test have demonstrated that the human osteoblast cells well attach and proliferate on the surface of Ti incorporated DLC films, suggesting possible applicatIons in bone related implant coatings.
