Materials Literature
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The dipole moments, dipole polarizabilities, and the first and second hyperpolarizabilities of the Group IIb sulfides have been calculated by using different high-level-correlated methods and including both the relativistic and vibrational contributions. The electron correlation effects have been studied at the levels…
The bulk chemical composition, mineral chemistry and clay mineralogy of soils developed on granodiorite parent materials were investigated in Yosemite National Park in the Sierra Nevada, CA. The soils studied were developed on glacial moraines estimated to be ∼20 Ka (Tioga), ∼130 Ka (Tahoe) and ∼300 Ka (pre-Tahoe) in…
We report on a light-induced phenomenon in dye-doped liquid crystals (LCs) with the distinctive features of molecular transport and assembly at micron scales. Under single-beam laser irradiation, the dye molecules phase separate from the LC host and assemble onto the cell substrate. Although the intensity of incident…
Abstract From scanning tunneling microscopy (STM) and atomic force microscopy (AFM) measurements, it was found that the lateral dimensions of the nanocrystallites systematically decrease with decreasing diameter of the primary particles. Furthermore these experiments suggest that these nanocrystallites, unregularly ti…
A methodology is presented for computing the deformation texture of polycrystalline metals that exhibit both crystallographic slip and mechanical twinning. Texturing is calculated by integrating a conservation equation for the orientation distribution function cast over an angle-axis parametrization of orientations. T…
Abstract An electron backscattering pattern (EBSP) is formed on a fluorescent (or other) screen from the faster scattered electrons when a single‐crystal region of a solid sample is illuminated by a finely focused electron beam (EB). The EBSP is very similar in appearance to the electron channeling pattern (ECP) that…
This paper deals with the impact behavior of natural fiber-reinforced epoxy foams. The effects of different types of fibers, fiber content and void content were discussed. It was found that the woven flax fiber results in composites with better impact strengths than the woven jute fiber based composites. The impact da…
The relaxation of stresses associated to extrinsic grain-boundary dislocations (EGBDs) in singular ∑ = 3, {111}, in vicinal ∑ = 11, {311} and in general ∑ = 11, {332} grain boundaries (GBs) has been investigated by in-situ transmission electron microscopy (TEM) using weak-beam conditions. In a singular ∑ = 3, {111} GB…
The use of oleochemical derivatives is dominated by applications in the field of surfactants and emulsifiers. There also is a remarkable amount of highly specialised uses, for example in lubricants and as additives to modify the characteristics of polymers. Besides this, some products have been developed on the basis…
The dynamic mechanical properties of A-glass bead filled polypropylene (PP)/ethylene–propylene–diene monomers polymer (EPDM) ternary composites have been measured over a temperature range from −80 °C to 100 °C and at a fixed frequency of 1 Hz, using a dynamic mechanical analyser (DMA), to identify the effects of the f…
The structure of buffalo lactoferrin has been determined at 303 K. The crystals belong to orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 77.5, b = 91.0, c = 131.5 A and Z = 4. The structure has been refined to an R factor of 0.187. The overall structure of the protein is similar to its structure…
Our early model for predicting nonwoven fabric stress-strain behavior by the finite element method is generalized to include the effects of fiber curl, which is shown to have a great effect on the tensile behavior of the fabric. A numerical method to characterize the lateral contraction of nonwovens during tensile def…
Two “self-complexing” macrocycles (22ab and 23ab) based on a methylthio-substituted derivative of the electron donor tetrathiafulvalene (TTF) and a cyclic bipyridinium acceptor have been prepared.[1] When “decomplexed” by fractional crystallization, the rigid compound 22b was not able to undergo “recomplexation” to an…
In a medium without serum, the initial adhesion of L1210 cells to nonsulfonated and sulfonated polymer surfaces was investigated. In the case of sulfonated polymer surfaces, the relative number of adhering cells strongly increases with an increase of the interfacial surface tension; that is, adhesion strongly depends…
Abstract The injection moldings of isotactic polypropylenes with various molecular weights were simulated using finite difference method. In the simulations, the unified crystallization model proposed in our previous paper was applied. The prediction of crystallinity and microstructure development in the moldings was…
Ultrastructural variation in valve morphology between members of Navicula “sensu stricto” is reviewed. Central and polar external raphe fissure paths, internal raphe features, the type and arrangement of the areolae, and girdle band morphology are documented and compared with these features in the generitype, Navicula…
We observe nonmetallic electronic states above the Fermi level in single-walled carbon nanotubes by measuring the energy distribution of thermal-field-emitted electrons. This measurement method examines electronic states associated with the nanotube cap or end termination, and with it, we resolve electronic states gre…
Both the large linewidth of optical transitions as well as the sizeable “Stokes” shift seem to suggest strong localization effects in nitride quantum wells. In contrast, we clearly show that the “Stokes” shift can be easily understood in terms of the huge piezoelectric fields present in such structures. At the same ti…
The Gilmore formulation for bubble dynamics coupled with zeroth-order gas diffusion were used to investigate theoretically the cavitation activity produced by a modified XL-1 lithotripter [J. Acoust. Soc. Am. 105, 1997-2009 (1999)]. The model calculation confirms many of the basic features in bubble dynamics observed…
The tetratricopeptide repeat (TPR) motif is a protein-protein interaction module found in multiple copies in a number of functionally different proteins that facilitates specific interactions with a partner protein(s). Three-dimensional structural data have shown that a TPR motif contains two antiparallel α-helices su…