Results 141 to 150 of about 308,630 (196)

Addressing compressive deformation of proteins embedded in crystalline ice

Structure, 2023
For cryoelectron microscopy (cryo-EM), high cooling rates have been required for preparation of protein samples to vitrify the surrounding water and avoid formation of damaging crystalline ice. Whether and how crystalline ice affects single-particle cryo-EM is still unclear. Here, single-particle cryo-EM was used to analyze three-dimensional structures
Huigang Shi, Chunling Wu, Xinzheng Zhang
openaire   +2 more sources

Deformation of Sand in Hydrostatic Compression

Journal of the Soil Mechanics and Foundations Division, 1967
The deformational behavior of a granular soil under hydrostatic compressive stress is studied. A theoretical model consisting of regular arrays of uniform spheres, but with a probabilistic distribution of holes in the arrays, is postulated. When Hertzian behavior at the points of contact between the spheres is assumed and the holes are made to close ...
Hon-Yim Ko, Ronald F. Scott
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Plastic deformation of calcite single crystals deformed in compression parallel to [111]

Physica Status Solidi (a), 1978
Natural calcite single crystals were plastically deformed by compression along [111] between 373 and 823 K. Thermal activation analysis of the deformation and TEM observation of the resulting dislocation structure indicate that two mechanisms control the dislocations motion.
P. Braillon, L. Rubin, J. Serttghetti
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Irrotational Deformations in Finite Compressible Elasticity

Mathematics and Mechanics of Solids, 1997
This paper examines nonhomogeneous deformations of homogeneous, isotropic, compressible, nonlinearly elastic solids. It is assumed that the deformation is the gradient of a scalar field, and then determine the equation satisfied by this field from the equation of equilibrium.
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Experimental deformation of flint in axial compression

Geological Society, London, Special Publications, 2005
Abstract The experimental deformation of flint, a water-rich (1–2 wt%) fine-grained (1 μm) microcrystalline quartz, has been studied using a gas-confining medium apparatus at 300 MPa confining pressure in the temperature range 500–1000 °C.
David Mainprice, Mervyn Paterson
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Intercellular Deformation in Compressed Organs

Annals of Botany, 1995
Intercellular deformations, caused by increasing levels of compression applied by a pressure chamber to an organ covered with a plastic sealant and evaluated according to the internal atmosphere removal rate, were observed in carrots (Daucus carota L. sativa), potatoes (Solanum tuberosum L.) and sweet-potatoes (Ipomea batatas L. Lam).
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Compressible flow in permeable capillaries under deformation

Chemical Engineering Science, 1978
Abstract An improved pressure loss model for viscous compressible flow through a long, permeable, polymeric capillary, a relevant problem in capillary gas permeator design, has been developed and confirmed experimentally. Experimental verification was obtained by measuring pressure losses over a silicone rubber capillary at various flow rates and ...
John M. Thorman, Sun-Tak Hwang
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Controllable infinitesimal deformations in homogeneously deformed compressible elastic materials

Applied Scientific Research, 1971
A controllable static deformation is a deformation that may be maintained in all materials of a given class under the action of surface forces alone. For compressible, homogeneous, isotropic elastic materials the only controllable deformations are homogeneous.
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Inelastic Deformation in Polymers under Multiaxial Compression

Mechanics of Time-Dependent Materials, 2000
Inelastic deformation in polymers under large deformation istypically accompanied by instabilities. These instabilities can beassociated with shear banding, barreling, buckling, etc., and canprevent complete characterization of the constitutive behavior.
K. Ravi-Chandar, Z. Ma
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Compressive deformation and fracture in WC materials

Materials Science and Engineering: A, 1988
Plastic flow and fracture have been studied in WC single crystals and in WC-Co materials. Deformation was introduced by several techniques which resulted in the development of high compressive stresses which encourage slip in WC. Optical and transmission electron microscopy studies show that plastic flow in the carbide phase always precedes fracture. A
David J. Rowcliffe, Vickram Jayaram, Mary K. Hibbs, Robert Sinclair   +3 more
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