Results 261 to 270 of about 7,829,285 (311)
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Structural analysis of mitochondrial pores
Experientia, 1990Structural information about the channel in the mitochondrial outer membrane, derived from sequence analysis and electron microscopy of two-dimensional crystals, is summarized. A model for the channel is presented, consisting of a cylindrical beta-barrel that is formed by one or two 30-kDa polypeptides, with an alpha-carbon backbone diameter of 3.8 nm.
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Modeling the pore structure of coal
AIChE Journal, 1987AbstractThe predictions of the random‐pore model, and various other models formulated here, are compared with experimental data for the uptake of methane by coal. It is found that the most appropriate is a modified model considering coal to be comprised of microporous grains, with the random‐pore model holding for the micropores in the grains.
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Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 1990
Small-angle x-ray scattering has been used in an investigation of the pore structure of “sivol,” a material prepared by thermochemical treatment of chrysotile asbestos. It has been shown that sivol has a well-developed pore structure. Pore size distribution curves have been obtained, showing a maximum with a radius of gyration R=2.5–3.0 nm.
G. M. Plavnik +3 more
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Small-angle x-ray scattering has been used in an investigation of the pore structure of “sivol,” a material prepared by thermochemical treatment of chrysotile asbestos. It has been shown that sivol has a well-developed pore structure. Pore size distribution curves have been obtained, showing a maximum with a radius of gyration R=2.5–3.0 nm.
G. M. Plavnik +3 more
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Fuel, 2015
Abstract Pore connectivity is limited in shale formations, unlike in conventional reservoirs, for which cyclic void models, such as the regular-lattice model, are often used to represent the connectivity. In the cyclic models, the random assignment of throat sizes to lattice elements leads to a plateau-like variation of a capillary pressure with ...
A. Sakhaee-Pour, Steven L. Bryant
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Abstract Pore connectivity is limited in shale formations, unlike in conventional reservoirs, for which cyclic void models, such as the regular-lattice model, are often used to represent the connectivity. In the cyclic models, the random assignment of throat sizes to lattice elements leads to a plateau-like variation of a capillary pressure with ...
A. Sakhaee-Pour, Steven L. Bryant
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Structure and Function of the ThermoTRP Channel Pore
2014Temperature-sensitive transient receptor potential (TRP) channels are structurally similar to other tetrameric cation channels, but can be potently activated by heat. Recent studies suggest that the pore-forming region directly participates in activation gating.
Zheng, Jie, Ma, Linlin
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2013
Dependence of texture on the pore structure is one of the most important fields of research. This is due to high sample-to-sample variations in application of mechanical tests. Tension, compression and flexure tests are the most common mechanical tests used in texture evaluation.
Alper Gueven, Zeynep Hicsasmaz Katnas
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Dependence of texture on the pore structure is one of the most important fields of research. This is due to high sample-to-sample variations in application of mechanical tests. Tension, compression and flexure tests are the most common mechanical tests used in texture evaluation.
Alper Gueven, Zeynep Hicsasmaz Katnas
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Pore Network and Morphological Characterization of Pore-Level Structures
SPE Canada Heavy Oil Technical Conference, 2017Abstract Due to the computational simplicity and time efficiency, pore network and morphological techniques are two practical approaches for characterization of pore-scale microstructures. The methods are quasi-static and exploit pore space spatial statistics to simulate pore invasions.
Peyman Mohammadmoradi +4 more
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European Journal of Environmental and Civil Engineering, 2011
Pour satisfaire les criteres de developpement durable et diminuer les emissions de dioxyde de carbone, l'utilisation de ciment de type CEM III a la place du CEM I est a developper. Cette etude montre l'influence de la cure et du ciment sur la structure poreuse de mortiers de CEM III A et C compares au CEM I et met en evidence un phenomene de peau ...
Bur, Nicolas +3 more
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Pour satisfaire les criteres de developpement durable et diminuer les emissions de dioxyde de carbone, l'utilisation de ciment de type CEM III a la place du CEM I est a developper. Cette etude montre l'influence de la cure et du ciment sur la structure poreuse de mortiers de CEM III A et C compares au CEM I et met en evidence un phenomene de peau ...
Bur, Nicolas +3 more
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Structure and assembly of pore-forming proteins
Current Opinion in Structural Biology, 2010Pore-forming proteins (PFPs), involved in host-pathogen interactions, are produced as soluble, generally monomeric, proteins. To convert from the soluble to the transmembrane form, PFPs assemble, in the vicinity of the target membrane, into ring-like structures, which expose sufficient hydrophobicity to drive spontaneous bilayer insertion.
Iacovache I +2 more
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The structure of pores in isolated pea nuclei
Journal of Ultrastructure Research, 1967Nuclei were isolated from the apical buds and upper stems of pea seedlings. The structure of the nuclear pores was examined in sections of intact nuclei and in negatively stained preparations of disrupted nuclei. These pores resembled those described in various animal cells and consisted of 1 to 3 granules or possibly tubules, at the center, surrounded
B Y, Yoo, S T, Bayley
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