Results 41 to 50 of about 122,821 (325)
HD gas analysis with Gas Chromatography and Quadrupole Mass Spectrometer [PDF]
, 2011 A gas analyzer system has been developed to analyze Hydrogen-Deuteride (HD) gas for producing frozen-spin polarized HD targets, which are used for hadron photoproduction experiments at SPring-8. Small amounts of ortho-H$_{2}$ and para-D$_{2}$ gas mixtures ($\sim$0.01%) in the purified HD gas are a key to realize a frozen-spin polarized target. In order
arxiv +1 more source
A Statistical Approach to Estimating Adsorption-Isotherm Parameters in Gradient-Elution Preparative Liquid Chromatography [PDF]
arXiv, 2022 Determining the adsorption isotherms is an issue of significant importance in preparative chromatography. A modern technique for estimating adsorption isotherms is to solve an inverse problem so that the simulated batch separation coincides with actual experimental results.
arxiv
Thin Layer Chromatography of Marihuana [PDF]
Journal of AOAC INTERNATIONAL, 1972 The various TLC methods employed in the separation and identification of Cannabis products to date are reviewed. Two solvent systems are recommended for rapid identification of marihuana: multiple development, semiquantitatiom, and wedge and loose-layer chromatographic techniques are discussed.
Harold L Fiske, James M Parker
openaire +2 more sources
Polar Pore Surface of Polyamide Membranes Enabling Efficient Solvent Mixture Separation
Advanced Functional Materials, EarlyView.A polyamide membrane with polar pore surfaces and relatively large pore is fabricated through interfacial polymerization between polyethyleneimine and trimesoyl chloride. Rapid separation of solvents with polarity differences is achieved by the synergistic effects of pore polarity and size sieving.
Aiwen Zhang +10 more
wiley +1 more source
Reversed-phase thin-layer chromatography behavior of aldopentose derivatives [PDF]
Hemijska Industrija, 2012 Quantitative structure-retention relationships (QSRR) have been used to study the chromatographic behavior of some aldopentose. The behavior of aldopentose derivatives was investigated by means of the reversed-phase thin-layer chromatography (RP TLC ...
Malbaša Radomir V. +3 more
doaj +1 more source
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
Advanced Functional Materials, EarlyView.Novel conjugated polymers with side‐chain π‐conjugation are developed to enhance organic thermoelectric properties. Remarkably, the pendant doping in the conjugated polymers preserved strong intermolecular ordering in the film states even at high FeCl3 dopant concentrations (16 – 32 mM), achieving a promising power factor > 10 µW m−1 K−2 across a wide ...
Hyeokjun Kim +4 more
wiley +1 more source
Thin-Layer Chromatography Of Red Dyes And Intermediates [PDF]
Naučno-Tehničeskij Vestnik Brânskogo Gosudarstvennogo Universiteta, 2015 Binary homogeneous azeotropic solvent mixtures for thin-layer chromatography of laser dyes and intermediates (cou-marins, naphthalimides, benzanthrones, phenalenones, γ-pyrone derivatives) are proposed with dielectric constants of 2,4 – 19,3 and boiling ...
Belov S.P. +2 more
doaj
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