Results 251 to 260 of about 822,015 (305)
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Journal of Chromatography A, 1996
A potential influence of gas chromatographic parameters on measured 13C/12C-isotope ratios of saturated fatty acid methyl esters in gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) has been studied. A dependence of measured isotope ratios on temperature gradients was observed and differences in measured δ13C-values for ...
W. Meier-Augenstein +2 more
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A potential influence of gas chromatographic parameters on measured 13C/12C-isotope ratios of saturated fatty acid methyl esters in gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) has been studied. A dependence of measured isotope ratios on temperature gradients was observed and differences in measured δ13C-values for ...
W. Meier-Augenstein +2 more
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The Ratio of Gas-Phase to Liquid-Phase Mass Transfer Coefficients in Gas-Liquid Contacting Processes
1984The results of multicomponent experiments with mass transfer at the air-water interface are analyzed using the indirect approach of fitting overall mass transfer rate constants to the two-resistance model with appropriate corrections for molecular diffusivities.
Christoph Munz, Paul V. Roberts
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Impact of surfactants on the rise of deformable bubbles and interfacial gas–liquid mass transfer
Journal of Fluid Mechanics, 2023Axisymmetric numerical simulations of the hydrodynamics around rising bubbles are performed in order to investigate the impact of surfactants on the bubble dynamics. Surfactants are assumed to be insoluble.
Kalyani Kentheswaran +3 more
semanticscholar +1 more source
Intensification of gas-liquid two-phase flow and mass transfer in microchannels by sudden expansions
, 2021The intensification of mass transfer of CO2 absorption into [Bmim][BF4] aqueous solution by continuous sudden expansion units was investigated experimentally in microchannels.
Shi‐Zheng Zhang +4 more
semanticscholar +1 more source
, 2020
The flow distribution and mass transfer for gas-liquid flow in two parallel microchannels with different tree-shaped distributor are studied. Two parallel microchannels, both consist of four parallel branches, operated in the slug flow and with Reynolds ...
Rongwei Guo +3 more
semanticscholar +1 more source
The flow distribution and mass transfer for gas-liquid flow in two parallel microchannels with different tree-shaped distributor are studied. Two parallel microchannels, both consist of four parallel branches, operated in the slug flow and with Reynolds ...
Rongwei Guo +3 more
semanticscholar +1 more source
The Analyst, 1975
Aqueous solutions containing inorganic orthophosphates from biological materials were purified on ion-exchange columns and the phosphate was precipitated as its silver salt. The dried silver phosphate was made to react with 1-bromobutane in dimethylformamide, yielding tri-n-butyl phosphate.
D, Barltrop, P A, Lewis
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Aqueous solutions containing inorganic orthophosphates from biological materials were purified on ion-exchange columns and the phosphate was precipitated as its silver salt. The dried silver phosphate was made to react with 1-bromobutane in dimethylformamide, yielding tri-n-butyl phosphate.
D, Barltrop, P A, Lewis
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Carbohydrate Research, 1992
In order to develop an alternative method to radioactive labeling for the study of the glycoprotein sugar metabolism in man, the possible use of stable isotopes provided by naturally, 13C-enriched dietary compounds has been explored in rat intestine and serum.
C, Rambal +5 more
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In order to develop an alternative method to radioactive labeling for the study of the glycoprotein sugar metabolism in man, the possible use of stable isotopes provided by naturally, 13C-enriched dietary compounds has been explored in rat intestine and serum.
C, Rambal +5 more
openaire +2 more sources
Journal of Mass Spectrometry, 2020
A novel, ecofriendly, and easy extraction and preconcentration method named as vortex-assisted spraying-based fine droplet formation liquid-phase microextraction was proposed for the determination of prochloraz at trace levels in orange juice samples by ...
Yaren Dikmen +5 more
semanticscholar +1 more source
A novel, ecofriendly, and easy extraction and preconcentration method named as vortex-assisted spraying-based fine droplet formation liquid-phase microextraction was proposed for the determination of prochloraz at trace levels in orange juice samples by ...
Yaren Dikmen +5 more
semanticscholar +1 more source
Rapid Communications in Mass Spectrometry, 2020
RATIONALE To achieve better precision and accuracy for δ13 C analysis of individual amino acids (AAs), we have developed a new analytical method based on multi-dimensional high-performance liquid chromatography (HPLC) and elemental analyzer/isotope ratio
Yuchen Sun +5 more
semanticscholar +1 more source
RATIONALE To achieve better precision and accuracy for δ13 C analysis of individual amino acids (AAs), we have developed a new analytical method based on multi-dimensional high-performance liquid chromatography (HPLC) and elemental analyzer/isotope ratio
Yuchen Sun +5 more
semanticscholar +1 more source
Journal of Separation Science, 2018
An ionic-liquid-based in situ dispersive liquid-liquid microextraction method coupled to headspace gas chromatography and mass spectrometry was developed for the rapid analysis of ultraviolet filters.
Stephen A. Pierson +2 more
semanticscholar +1 more source
An ionic-liquid-based in situ dispersive liquid-liquid microextraction method coupled to headspace gas chromatography and mass spectrometry was developed for the rapid analysis of ultraviolet filters.
Stephen A. Pierson +2 more
semanticscholar +1 more source