Materials Literature
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It is shown how the magnetization and magnetostriction of Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/ can be calculated using a three-dimensional anisotropy model with fractional occupancies p/sub 1/,. . .p/sub 8/ along each of the easyaxes. This model assumes no interaction between the domains. Three-dimensional plots of the sum…
Diffuse reflectance infrared spectra of kaolinite and binary mixtures of this clay with alkali halides have been analysed using curve-fitting and deconvolution. For caesium chloride and caesium bromide, decomposition of the hydroxyl stretching region has made it possible to correlate the positions and intensities of b…
Brillouin scattering in an organic glass-forming liquid up to a pressure of 12 GPa is reported. The onset of the unrelaxed regime is indicated by a distinct maximum in the acoustic attenuation at a pressure ${\mathit{P}}_{\mathrm{\ensuremath{\alpha}}}$, above which weak shear modes are resolved. Sound velocity data ar…
Sol-gel processes have been used to trap liquid crystal droplets into silica gel glasses. Several monomer mixtures and liquid crystals have been used. In most cases, trapping of spherical droplets has been achieved and droplet sizes from < 1 to 200 μm have been obtained. Switching between opaque and transparent states…
The 11.5-kDa Zn(2+)-binding protein (ZnBP) was covalently linked to Sepharose. Affinity chromatography with a cytosolic subfraction from liver resulted in purification of a predominant 38-kDa protein. In comparable experiments with brain cytosol a 39-kDa protein was enriched. The ZnBP-protein interactions were zinc-sp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of polymer matrix on the oxygen diffusion via a cobalt porphyrin fixed in a membraneHiroyuki Nishide, Hiroyoshi Kawakami, Takayuki Suzuki, Yasutaka Azechi, Yuji Soejima, and Eishun TsuchidaCite this: Macromolecules 1991, 24, 23, 6306–6309Publication Date (Print):Novem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence of tris(2,2'-bipyridine)ruthenium(II) in sol-gel glassesKazunori Matsui, Kei Sasaki, and Nobuyuki TakahashiCite this: Langmuir 1991, 7, 11, 2866–2868Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 Novemb…
An incoherent {112} twin boundary in aluminium has been observed by high resolution electron microscopy. No rigid body translation parallel to the boundary plane has been found. The experimental structure is in agreement with one of the calculated models. The junction of the {112} segment with a coherent {111} boundar…
The multisolution method of phase determination combing entropy maximization and likelihood evaluation, previously developed for and applied to single-crystal X-ray studies [Bricogne & Gilmore (1990). Acta Cryst. A46, 284–297; Gilmore, Bricogne & Bannister (1990). Acta Cryst. A46, 297–308], is here extended to permit…
The objectives of this work were to develop a method to measure the tensile properties of individual cotton fibers and to use the data from the method to study the relationships between the tensile properties of individual fibers and fiber bundles. Mathematical models were developed to predict bundle strength from ind…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSTM imaging of the surface of small metal particles formed in anodic oxide poresG. H. Pontifex, P. Zhang, Z. Wang, T. L. Haslett, D. AlMawlawi, and M. MoskovitsCite this: J. Phys. Chem. 1991, 95, 24, 9989–9993Publication Date (Print):November 1, 1991Publication History Publi…
fdnG, encoding the selenopeptide of Escherichia coli formate dehydrogenase-N, contains an in-frame opal (UGA) codon at amino acid position 196 that directs selenocysteine incorporation. We have identified sequences that contribute to the mRNA context required for decoding this UGA as selenocysteine. We identified a po…
The dipole-dipole-quadrupole (B) and second dipole (\ensuremath{\gamma}) hyperpolarizabilities and the dipole (${\mathrm{\ensuremath{\alpha}}}_{1}$) and quadrupole (${\mathrm{\ensuremath{\alpha}}}_{2}$) polarizabilities are calculated for the ground states of the magnesium and calcium atoms and the aluminum cation. Th…
An isocitrate dehydrogenase able to function with either NADP or NAD as coenzyme was purified to homogeneity from cell-free extracts of the purple photosynthetic eubacterium Rhodomicrobium vannielii using a rapid two-step procedure involving dye-ligand affinity chromatography. The enzyme was obtained in 60% yield with…
Abstract The protonation/deprotonation reaction of polyaniline in the emeraldine oxidation state (PANI‐E) is discussed on the basis of membrane‐equilibrium considerations. The important role of the partitioning of H + between the polymer and the bathing solution is pointed out. The concentration of (free) H + in the p…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTopological control of electron localization in .pi.-conjugated polyarylmethyl carbopolyanions and radical anionsSuchada Utamapanya and Andrzej RajcaCite this: J. Am. Chem. Soc. 1991, 113, 24, 9242–9251Publication Date (Print):November 1, 1991Publication History Published on…
Highly Magnetostrictive materials such as Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/, commercially known as Terfenol-D, have been used to date in a variety of devices such as high-power actuators and linear motors. The larger magnetostriction available in twinned single-crystal Terfenol-D, approximately 2000 p.p.m. at moderate m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPredicted geometries of porphyrin excited states and radical cations and anionsKristine Prendergast and Thomas G. SpiroCite this: J. Phys. Chem. 1991, 95, 24, 9728–9736Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1…
Energy-filtered convergent-beam electron diffraction (CBED) patterns were obtained from a 10A˚region of the specimen in a scanning transmission electron microscope (STEM) equipped with a digital image-acquisition system. For crystalline silicon, plasmon scattering causes a blurring of the low-order Bragg beams. Signif…