Adsorption Factor

2016 ◽  
Author(s):  
Monica Nordberg ◽  
John H. Duffus ◽  
Douglas M. Templeton
Keyword(s):  
Adsorption Factor

Mass Transfer Mechanisms of ASP Flooding in Porous Media

2012 ◽  
Vol 550-553 ◽  
pp. 2738-2744 ◽  
Author(s):  
Han Min Xiao ◽  
Ling Hui Sun ◽  
Hui Hui Kou
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Interfacial Tension ◽  
Transfer Equation ◽  
Mass Transfer Equation ◽  
Transfer Property ◽  
Asp Flooding ◽  
Transfer Mechanisms ◽  
Adsorption Factor

Experiments on chromatography separation are taken for ASP flooding. Mass transfer equation is estabilished and mutiple adsorption factor is obtained. Mutiple adsorption factor is used to analyze the experiment results. The Mass transfer property of alkali, surfactant and polymer during single fooding and ASP flooding and the effect on interfacial tension of oil/solution are discussed. The results show the diffrence of hesteris degree of alkali, surfactant and polymer deduce the chromatography separation, lowing the active of ASP flooding. Accoding to interfacial tension, the efficent length of ASP slug is discussed.

Influence of adsorption factor on dispersive capacity of polymethyl methacrylate

1977 ◽  
Vol 13 (1) ◽  
pp. 79-81
Author(s):  
G. A. Gorokhovskii ◽  
G. V. Samsonov ◽  
V. P. Gorshunov
Keyword(s):  
Polymethyl Methacrylate ◽  
Adsorption Factor

Adsorption Factor

2016 ◽  
Author(s):  
Monica Nordberg ◽  
Douglas M. Templeton ◽  
Ole Andersen ◽  
John H. Duffus
Keyword(s):  
Adsorption Factor

Conceptualisation of Diagnostic Agents: From Empirical In Vivo Screening to Rational In Vitro Predictive Parameters

2000 ◽  
Vol 28 (2) ◽  
pp. 303-314 ◽  
Author(s):  
Hafid Belhadj-Tahar ◽  
Rachid Boumahdi ◽  
Marie-hélène Darbieu
Keyword(s):  
Classical Model ◽  
Explanatory Power ◽  
Free Fraction ◽  
Coefficient Of Determination ◽  
In Vivo Screening ◽  
Predictive Parameters ◽  
Diagnostic Agents ◽  
Adsorption Factor

A new rational conceptualisation protocol in new isotopic diagnostic agents has been designed to avoid systematic empirical in vivo screening. This protocol is based on multiple regression analysis, in order to determine the pharmacokinetic model capable of explaining in the best possible way the in vivo behaviour of molecules injected into an organism. Nine technetium complexes (99mTc-L) were synthesised from aminothiol ligand vectors. These complexes were characterised in terms of their physical, chemical and biological in vitro properties, i.e. lipophilicity (P), free fraction unbound to plasmatic proteins (Fup), the fraction unbound to blood cells (FuCb), and membrane adsorption fraction (Fad), an original factor assessed in vitro. Thus, two pharmacokinetic models were tested. The first takes into account the parameters classically used in pharmacokinetics (P, Fup, FuCb), and the second, in parallel with the first, includes the membrane adsorption rate (polar/apolar/polar membrane model). According to the phenomenon of tissular distribution, the explanatory power of the second model, including the Fad, is radically greater than that of the classical model. The comparative adjusted coefficient of determination ([Formula: see text]2) of the model, including the Fad versus [Formula: see text]2 of the first model, are heart (91%/6%), liver (89%/47%), spleen (64%/44%), lung (78%/26%), kidney (70%/33%) and brain (73%/8%), respectively. In addition, as for the myocardium, the membrane adsorption factor seems to be the only predictive factor of the affinity between the myocardium and neutral or cationic molecules. This refutes the generally held view that only cationic molecules could have an affinity with the heart.

scholarly journals Liquid-phase hydrogenation of 1-hexene and phenylacetylene over multicomponent nickel skeleton catalysts

2021 ◽  
Vol 340 ◽  
pp. 01010
Author(s):  
Saltanat Suimbayeva ◽  
Zhaksyntay Kairbekov ◽  
Indira Jeldybayeva ◽  
Elmira Ermoldina
Keyword(s):  
Liquid Phase ◽  
Nickel Catalyst ◽  
Spatial Orientation ◽  
Nickel Catalysts ◽  
Free Energies ◽  
Unsaturated Hydrocarbons ◽  
Major Mechanism ◽  
Liquid Phase Hydrogenation ◽  
Bearing Alloy ◽  
Adsorption Factor

This paper presents the results of a study of the process of hydrogenation of 1-hexene in ethanol and phenylacetylene in a hexanewater suspension over multicomponent nickel skeleton catalysts It was demonstrated that the activity of multicomponent skeleton nickel catalysts is substantially dependent on the nature of the additives introduced into the bearing alloy. Introduction of Cu, Pb and Ta leads to an increase in activity (W=196-295cm3/min-gNi). The major mechanism of the effect of emulsion composition on the rate and selectivity of hydrogenation of phenylacetylene involves a change in the coefficient of distribution of substances between the solution and the surface of the skeleton nickel catalyst. It was also shown that the presence of water, which competes with unsaturated hydrocarbons during adsorption, adversely affects the process of purification from acetylenic hydrocarbons, as well as the stereo-regular polymerization of monomer. The research results of the kinetics and direction of the processes of hydrogenation of phenylacetylene suggest significant effect of the adsorption factor, including the ratio of free energies, concentrations and spatial orientation of the molecules of the mixture components, as well as the interaction of reacting substances and hydrogen with thecatalyst surface.

Dose adsorption factor for a cylindrical source in the presence of shielding

Atomic Energy ◽  
1963 ◽  
Vol 12 (6) ◽  
pp. 561-562
Author(s):  
D. P. Osanov ◽  
E. E. Kovalev
Keyword(s):  
Cylindrical Source ◽  
Adsorption Factor

Adsorption Factor

2016 ◽  
Author(s):  
John H. Duffus ◽  
Monica Nordberg ◽  
Douglas M. Templeton
Keyword(s):  
Adsorption Factor

Stereoselective adsorption utilizing l-phenylalanine imprinting chiral ordered mesoporous silica

RSC Advances ◽  
2014 ◽  
Vol 4 (98) ◽  
pp. 54998-55002 ◽  
Author(s):  
Meng-xiang Su ◽  
Zhong-ying Liu ◽  
Jin-long Chen ◽  
Li-fei Cheng ◽  
Bo Li ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Structural Features ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Adsorption Factor

l-Phenylalanine imprinting chiral ordered mesoporous silica (l-Phe-COMS) was endowed with unique structural features, showing a high stereoselective adsorption factor of up to 3.24 for l-phenylalanine over d-phenylalanine.

Sign in / Sign up

Export Citation Format

Share Document