Materials Literature
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Enzyme I, the first in the sequence of phosphocarrier proteins of the bacterial phosphoenolpyruvate:glycose phosphotransferase system, is a potential critical point for regulating sugar uptake. The thermal stability of Enzyme I was studied by high sensitivity differential scanning calorimetry. At pH 7.5, thermal unfol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMononuclear manganese(IV) in tridentate ONO coordination. Synthesis, structure, and redox regulation via oxygen donor variationSomnath Dutta, Partha Basu, and Animesh ChakravortyCite this: Inorg. Chem. 1991, 30, 21, 4031–4037Publication Date (Print):October 1, 1991Publicatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoil-globule transition of poly(N-isopropylacrylamide): a study of segment mobility by fluorescence depolarizationT. Binkert, J. Oberreich, M. Meewes, R. Nyffenegger, and J. RickaCite this: Macromolecules 1991, 24, 21, 5806–5810Publication Date (Print):October 1, 1991Publica…
Corona discharge has been widely used to modify polymer surfaces because it can be operated at an atmospheric pressure in air. In this study, wool fiber and fabric were corona discharged, and afterwards wettability, laundry shrinkage, and frictional coef ficients were determined. An ESCA analysis was done to elucidate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of rigid dendritic macromolecules: enlarging the repeat unit size as a function of generation, permitting growth to continueJeffrey S. Moore and Zhifu XuCite this: Macromolecules 1991, 24, 21, 5893–5894Publication Date (Print):October 1, 1991Publication History Pub…
Structure self-assembling in the spinodal decomposition (SD) of polymer blends in its late stage has been explored for a near-critical mixture of polybutadiene and polyisoprene by a time-resolved light scattering technique, with a particular emphasis on the time evolution of the interface structure. By analysis of a s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganosoluble, segmented rigid-rod polyimide film. 1. Structure formationStephen Z. D. Cheng, Fred E. Arnold Jr., Anqiu Zhang, Steve L. C. Hsu, and Frank W. HarrisCite this: Macromolecules 1991, 24, 21, 5856–5862Publication Date (Print):October 1, 1991Publication History Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of main-group-element-centered octahedral gold clustersA. Goerling, N. Roesch, D. E. Ellis, and H. SchmidbaurCite this: Inorg. Chem. 1991, 30, 21, 3986–3994Publication Date (Print):October 1, 1991Publication History Published online1 May 2002Published in…
X-ray crystallography (see Refs. 1 , 2 for reviews) is an increasingly impor tant tool for understanding structure, function, and control of biological macromolecules. Developments in genetics, data collection, and computer hardware have produced an unprecedented growth of macromolecular crystallographic studies. X-r…
A simplified method was established for cryopreservation of peripheral blood stem cells (PBSCs) using hydroxyethyl starch (HES) and dimethylsulfoxide (DMSO) as a cryoprotective agent at -80 degrees C without rate-controlled freezing. The data indicate that a cryoprotective solution consisting of 6% HES and 5% DMSO pro…
The hydrogen treatment of the Nd-Fe-B alloy ingots was found to produce magnet powders with good magnetic properties. Typical magnetic properties of these powders are as follows; 4πIs = 9.5 kG, Br = 7.7 kG, iHc = 9.4 kOe, and (BH)max = 12.2 MGOe. Microstructural studies of these powders showed that they are made of fi…
The dynamics of the \ensuremath{\alpha} relaxation in a glass-forming polymeric system, poly(vinyl methyl ether) (PVME) has been studied by means of dielectric and mechanical spectroscopies and nuclear magnetic resonance, as well as by means of quasielastic neutron scattering. By using these techniques we have covered…
The indentation technique has been used to evaluate the hardness and fracture toughness of SiC‐reinforced MoSi 2 composites made by hot‐pressing. It is seen that the toughness increases with increasing indentation crack length (under increasing load) and a probable mechanism responsible for this behavior is described.…
Recent studies have shown that the mullitization of diphasic aluminosilicate matrices comprising transitional alumina and amorphous silica occurs via a nucleation and growth process. Nucleation is preceded by a temperature‐dependent incubation period. Following this incubation period, rapid nucleation of mullite occur…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDecomposition of dichlorodifluoromethane on boron phosphate (BPO4) catalystSeiichiro Imamura, Kenichiro Imakubo, Setsuo Furuyoshi, and Hitoshi JindaiCite this: Ind. Eng. Chem. Res. 1991, 30, 10, 2355–2358Publication Date (Print):October 1, 1991Publication History Published o…
Control over the structure of hybrid (colloidal + molecular) aluminosilicate gels was utilized to demonstrate that precursor chemistry has a direct and controllable effect on the ∼1000°C crystallization of spinel and mullite in molecular precursor systems. Synthesis or preparation conditions leading to the development…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResilience of all-carbon molecules C60, C70, and C84: a surface-scattering time-of-flight investigationRainer D. Beck, Pamela St. John, Marcos M. Alvarez, Francois Diederich, and Robert L. WhettenCite this: J. Phys. Chem. 1991, 95, 21, 8402–8409Publication Date (Print):Octob…
Glucose and ball-milled α-Al2O3 mixed powder was hydrothermal treated to synthesize Al2O3/C mixture, which was directly heated to 1700–1750 °C for 10 min holding in N2. Fine and single phase AlON powders were successfully fast prepared by one-step carbothermal reduction and nitridation (CRN). With aggregation of as-pu…
Low-angle X-ray diffraction profiles can provide detailed information about the multilayer periodicity and thickness of the individual layers that make up a multilayer. The effect of discrete and continuous random cumulative fluctuations of the layer thicknesses on the diffraction profiles of single films, bilayers an…
Both bookshelf and quasi-bookshelf layer structures are obtained by using naphthalene base liquid crystal mixture with a rubbed polymer orientation films panel. This panel shows a high contrast ratio reaching at 35:1 and high transmittance of 40% driven by multiplexing method.