نتایج جستجو برای: water permeability test

تعداد نتایج: 1368086  

Journal: :The Journal of General Physiology 1978
L Y Huang W A Catterall G Ehrenstein

The selectivity of acetylcholine (A-Ch)-activated channels for alkali cations, organic cations, and nonelectrolytes in cultured muscle cells has been studied. To test the effect of size, charge, and hydrogen-binding capacity of permeant molecules on their permeability, we have obtained the selectivity sequences of alkali cations, compared the permeability of pairs of permeant molecules with sim...

2012
Baoguo Han Zhengxian Yang Xianming Shi

This paper preliminarily investigates the general transport properties (i.e., water sorptivity, water permeability, and gas permeability) of carbon-nanotube/cement composites. Carboxyl multi-walled carbon nanotubes (MWNTs) are dispersed into cement mortar to fabricate the carbon nanotubes (CNTs) reinforced cement-based composites by applying ultrasonic energy in combination with the use of surf...

Journal: :international journal of infection 0
somayeh jahani infectious diseases and tropical medicine research center, zahedan university of medical sciences, zahedan, ir iran gholamreza kavoosi institute of biotechnology, shiraz university, shiraz, ir iran amin shakiba institute of biotechnology, shiraz university, shiraz, ir iran; institute of biotechnology, shiraz university, p. o. box: 71441-65186, shiraz, iriran. tel: +98-5413229792, fax: +98-5413229792

results gelatin films exhibited good tensile strength and elongation at break, water solubility, swelling, and water vapor permeability. incorporation of tam into the gelatin films caused a significant decrease in tensile strength and swelling, and a significant increase in elongation at break, water solubility, water vapor permeability and whiteness of the films. gelatin films exhibited low an...

2015
Peng Zhu Chengyan Lin Peng Wu Ruifeng Fan Hualian Zhang Wei Pu

By analyzing the permeability controlling factors of tight sandstone reservoir in Wuhaozhuang Oil Field, the permeability is considered to be mainly controlled by porosity, clay content, irreducible water saturation and diagenetic coefficient. Because the conventional BP algorithm has its drawbacks such as slow convergence speed and easy falling into the local minimum value, an improved three-l...

Journal: :Plant physiology 2006
Hui Wei David B Layzell

In response to changes in phloem supply, adenylate demand, and oxygen status, legume nodules are known to exercise rapid (seconds to hours) physiological control over their permeability to oxygen diffusion. Diffusion models have attributed this permeability control to the reversible flow of water into or out of intercellular spaces. To test hypotheses on the mechanism of diffusion barrier contr...

2016
Tadao Kozumi Yoshichika Kitagawa

Aquporins are intrinsic membrane proteins that function as water channel to transport water and/or mineral nutrients across biological membranes. In this study, we aimed to clarify whether water structure can be changed by the presence of ceramics and whether such a change can be determined by aquaporin. First, we confirmed that ceramics could transform tap water into active tap water by increa...

Journal: :iranian journal of oil & gas science and technology 2015
mojtaba ghaedi zoltán e. heinemann mohsen masihi mohammad hossein ghazanfari

in this paper, a very efficient method, called single matrix block analyzer (smba), has been developed to determine relative permeability and capillary pressure curves from spontaneous imbibition (si) data. smba mimics realistically the si tests by appropriate boundary conditions modeling. in the proposed method, a cuboid with an identical core plug height is considered. the equal dimensions of...

2006
Hui Wei

In response to changes in phloem supply, adenylate demand, and oxygen status, legume nodules are known to exercise rapid (seconds to hours) physiological control over their permeability to oxygen diffusion. Diffusion models have attributed this permeability control to the reversible flow of water into or out of intercellular spaces. To test hypotheses on the mechanism of diffusion barrier contr...

Journal: :Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology 2008
Qing-Xia Meng Hui-Juan Gao Chen-Ming Xu Min-Yue Dong Xia Sheng Jian-Zhong Sheng He-Feng Huang

BACKGROUND/AIMS Aquaporin-3 (AQP3), one isoform of water channel family, has been found to be expressed in mouse oocytes. The present study aimed to investigate whether functional AQP3 was expressed in oocytes induced by controlled ovarian hyperstimulation (COH), and whether altered oocyte AQP3 expression was associated with changes in fertilization rate. METHODS Sixty ICR female mice were di...

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