Results 41 to 50 of about 1,057,049 (232)
Separation of triglycerides by gas-liquid chromatography
Journal of Lipid Research, 1968 The parameters affecting the separation and quantification of triglycerides by gas-liquid chromatography have been investigated with the use of QF-1 and SE-30 as stationary phases and a flame ionization detector.The isothermal characteristics of a wide ...
Rodney Watts, R. Dils
doaj
Determination of Trace Moisture Content in Dimethylacetamide by Gas Chromatography [PDF]
arXiv, 2018 Dimethylacetamide is used as a solvent in polymer processing and moisture in DMA affects the morphology and mechanical properties of the polymer products. This paper describes a method for determination of trace moisture content in DMA by acetylene production - gas chromatography. In the condition of 30 centigrade and ultrasonic dispersion, moisture in
arxiv
Resolution Chromatography of Diffusion Models [PDF]
arXiv, 2023 Diffusion models generate high-resolution images through iterative stochastic processes. In particular, the denoising method is one of the most popular approaches that predicts the noise in samples and denoises it at each time step. It has been commonly observed that the resolution of generated samples changes over time, starting off blurry and coarse,
arxiv
Kinetic formulation of a 2 $\times$ 2 hyperbolic system arising in gas chromatography [PDF]
arXiv, 2017 The PSA system commonly used in the context of gas-solid chromatography is reformulated as a single kinetic equation using an additional kinetic variable. A kinetic numerical scheme is built from this new formulation and its behavior is tested on solving the Riemann problem in different configurations leading to single or composite waves.
arxiv
Hyocholic acid as internal standard for quantitation of human fecal bile acids
Journal of Lipid Research, 1973 After hyocholate is added to a fecal homogenate, the bile acids are extracted, purified by thin-layer chromatography, and quantitated by gas–liquid chromatography as methyl ester trifluoroacetates on QF-1 columns.
M. T. Ravi Subbiah
doaj
Determination of carbohydrates in infant milk powders by ultra-performance liquid chromatography with evaporative light scattering detector and BEH HILIC column [PDF]
arXiv, 2017 The possibility of carbohydrate separation in BEH HILIC (Ethylene Bridged Hybride, Hydrophilic Interaction Liquid Chromatography) column was studied by ultra-performance liquid chromatography (UPLC) with evaporative light scattering detector (ELSD) and mobile phase containing amine compounds as modifiers.
arxiv
Isotope effects in gas–liquid chromatography of steroids
Journal of Lipid Research, 1965 When gas–liquid chromatography was performed with steroids containing H3 and C14, the H3/C14 ratio of the effluent was higher at the beginning and at the tail of the steroid peak.
Marvin A. Kirschner, Mortimer B. Lipsett
doaj
Journal of Lipid Research, 1971 It is shown that methanolysis of dihydrosterculoyl lecithin with boron trifluoride–methanol introduces artifacts which are absent if the methyl ester is prepared by saponification of the lipid followed by treatment with diazomethane.
E.A. Dawidowicz, T.E. Thompson
doaj
Gas-liquid chromatographic analysis of free long-chain aldehydes
Journal of Lipid Research, 1969 Quantitative results are reported for gas-liquid chromatography of mixtures of free tetra-, hexa-, and octadecanals and cis-9-octadecenal on polar and nonpolar liquid phases.
Randall Wood, R.D. Harlow
doaj
Some new well-posedness results for continuity and transport equations, and applications to the chromatography system [PDF]
arXiv, 2009 We obtain various new well-posedness results for continuity and transport equations, among them an existence and uniqueness theorem (in the class of strongly continuous solutions) in the case of nearly incompressible vector fields, possibly having a blow-up of the BV norm at the initial time. We apply these results (valid in any space dimension) to the
arxiv