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Nuclear pore structure and function
Seminars in Cell Biology, 1992Nuclear pores are huge macromolecular assemblies, approximately 120 nm in diameter, that perforate the nuclear membrane and mediate nucleocytoplasmic transport. Nuclear pores are constructed from a cylindrical spoke-plug complex sandwiched between nucleoplasmic and cytoplasmic rings.
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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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Pore-forming bacteriocins: structural–functional relationships
Archives of Microbiology, 2018Peptides and proteins are important bioorganic compounds in nature, among which a special place is occupied by antimicrobial substances. There are more than 2000 different antimicrobial peptides (AMPs) produced by a variety of living organisms. Bacteriocins produced by bacteria are the minor group, whose chemical structures are most complicated among ...
Alexey S, Vasilchenko +1 more
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Imaging the Pore Structure of Geomaterials
Science, 1995Laser scanning confocal microscopy can be used to image the pore structure of geologic materials in three dimensions at a resolution of 200 nanometers. The technique involves impregnation of the void space with an epoxy doped with a fluorochrome whose fluorescent wavelength matches the excitation wavelength.
Fredrich, J. +2 more
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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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Nuclear Pore Complex Structure in Birds
Journal of Structural Biology, 1997The nuclear envelope consists of two parallel membranes enclosing an aqueous lumen. In places there are pores in both membranes at which the two membranes are joined. Within these pores reside the nuclear pore complexes. The current structural models of the nuclear pore complex have been derived from a number of studies using different electron ...
M W, Goldberg, I, Solovei, T D, Allen
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Pore-like structures in biological membranes
Journal of Cell Science, 1977ABSTRACT In freeze-fracture replicas, biological membranes appear as smooth surfaces interrupted by random globular protrusions, the intramembrane particles. Smooth areas correspond to the membrane phospholipidic domain, while intramembrane particles are the morphological counterpart of membrane proteins. In the present work, examination
L, Orci +3 more
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Evaluating Geotextile Pore Structure
1996There are many test methods available to determine the pore sizes of geotextile filters. Often overlooked is the fact that each method provides a different interpretation of a geotextile's pore structure. A survey of the available test methods, indicates that four categories of pores can be measured.
GR Fischer, RD Holtz, BR Christopher
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Pore Structure of Imogolite Computer Models
Langmuir, 1996This study analyzes computer models of the microporous material imogolite. The purpose of this work is to validate computational methods developed for extracting pore size, pore volume, and surface area measurement of molecular level computer models. We accomplished this by comparing model properties with experimental data derived from N2 adsorption ...
Pohl, Phillip I +2 more
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Hierarchical Pore Structures through Diatom Zeolitization
Angewandte Chemie International Edition, 2000The controlled construction of a microporous/macroporous materials from diatomaceous earth and a high silica zeolite by a simple method is reported. The picture shows scanning electron microscopy images of the material at two scales (left and center) and the arrangement of the zeolite crystals precipitated onto it (right). These materials have numerous
Anderson, Michael W. +3 more
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