Materials Literature
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Competing single-ion 4f magnetic anisotropies have been studied within a noncollinear three-sublattice mean-field crystal-electric-field model in order to explain the observed complex magnetic behavior in the pseudobinary series ${\mathrm{Pr}}_{\mathit{x}}$${\mathrm{Nd}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{…
NMR spectroscopy and optical microscopy have been used to study phase transitions and structure in nematic lyotropic mesophases formed by potassium laurate, decylammonium hydrochloride and water. The different mesophases obtained in a well-defined composition range have been characterized, by deuterium NMR, following…
The three-dimensional structures of apo- and holomutant human lysozymes (D86/92 lysozyme), in which a calcium binding site was designed and created for enhancing molecular stability by replacing both Gln86 and Ala92 with aspartic acids, were refined at 1.8-A resolution by x-ray crystallography. The overall structures…
The synthesis and crystal structure of a new perovskite-based bismuth oxide are reported. The phase, of composition ${\mathrm{Ba}}_{1.7}$${\mathrm{K}}_{1.3}$${\mathrm{Bi}}_{2}$${\mathrm{O}}_{7}$, is the n=2 member of the Ruddlesden-Popper series ${\mathit{A}}_{\mathit{n}+1}$${\mathit{B}}_{\mathit{n}}$${\mathrm{O}}_{3\…
Monoclonal antibodies (MAbs) specific for cellobiohydrolase I (CBH I) and endoglucanase I (EG I) were conjugated to 10- and 15-nm colloidal gold particles, respectively. The binding of CBH I and EG I was visualized by utilizing the MAb-colloidal gold probes. The visualization procedure involved immobilization of cellu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLong-range magnetic interactions between manganese centers separated by 7 .ANG. in MnIIIZnIIMnIII and MnIVZnIIMnIV complexesPhalguni Chaudhuri, Manuela Winter, Frank Birkelbach, Peter Fleischhauer, Wolfgang Haase, Ulrich Floerke, and Hans Juergen HauptCite this: Inorg. Chem.…
The interaction of formic acid (HCOOH) with Pd(110) was studied using TPD and XPS. At low doses, at an adsorption temperature of 140 K, HCOOH decomposed to yield CO, CO 2 , H 2 and H 2 O during TPD. CO and H 2 were evolved in desorption-limited peaks at 470 and 320 K, respectively. The CO and H 2 O desorptions were sa…
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…