Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
We present a new approach to yarn characterization and yarn tensile response based on fiber parameters such as strength and strain-at-break, length, and fineness. Yarn characterization is concerned with twist, linear density, and the ratio of experimental yarn unevenness to the Martindale's limit characteristic for sp…
Abstract It is shown that a quantitative description of the energy‐loss processes in a reflection electron energy‐loss spectroscopy (REELS) experiment cannot be obtained from a simple linear combination of pure bulk and pure surface components. A quantitative description can, however, be obtained within the dielectric…
The presence of three phases was found between SmA and the antiferroelectric SmC A * phase in optically active ( R )-4-(1-methylheptyloxycarbonyl)phenyl 4'-octylbiphenyl-4-carboxylate. Two of these phases were identified as SmC α * and SmC γ * by the miscibility test. The remaining phase between these was confirmed to…
In a systematic attempt to identify residues important in the folding and stability of T4 lysozyme, five amino acids within alpha-helix 126-134 were substituted by alanine, either singly or in selected combinations. Together with three alanines already present in the wild-type structure this provided a set of mutant p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-consistent theory of block copolymer blends: selective solventM. Banaszak and M. D. WhitmoreCite this: Macromolecules 1992, 25, 13, 3406–3412Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.…
The ternary complex of NAD-dependent formate dehydrogenase (FDH) from the methylotrophic bacterium Pseudomonas sp. 101 (enzyme-NAD-azide) has been crystallised in the space group P2(1)2(1)2(1) with cell dimensions a = 11.60 nm, b = 11.33 nm, c = 6.34 nm. There is 1 dimeric molecule/asymmetric unit. An electron density…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrical and physical properties of new electrically conducting quasi-composites. Poly(aniline-co-N-butylaniline) copolymersJean Yves Bergeron and Le H. DaoCite this: Macromolecules 1992, 25, 13, 3332–3337Publication Date (Print):June 1, 1992Publication History Published o…
Using high‐temperature solution calorimetry in molten 2PbO. B 2 O 3 , the enthalpy of reaction of the formation of zircon, ZrSiO 4 , from its constituent oxides has been determined: Δ r H 977 (ZrSiO 4 ) =−27.9 (± 1.9) kJ/mol. With previously reported data for the heat contents of ZrO 2 , SiO 2 , and ZrSiO 4 and standa…
The room‐temperature fracture behavior of polycrystalline MoSi 2 was characterized using Vickers indentation fracture. Fracture analysis was aided by the optically active grain structure of MoSi 2 revealed under polarized light. Radial crack propagation from indentations was found to be predominantly transgranular. Th…
The research career of Karl F. Lindman, who has widely been referred to as being the first to demonstrate the effect of a chiral medium on electromagnetic waves, is described. During the first half of this century, Lindman completed an extensive research career, using essentially the same methods as Heinrich Hertz did…
Polycrystalline and amorphous Si-C films were prepared by rf glow-discharge decomposition of silane-methane mixtures at 700 °C. We have demonstrated that polycrystalline SiC films with large grains grow under heavy hydrogen dilution. The bonding properties as a function of film composition and hydrogen dilution were c…
Mg 10 Si 3 O 14 (OH) 4 crystallizes in the orthorhombic space group Pnnm with lattice parameters a =5.0894, b=13.968, c=8.6956A. This compound si part of a series related by crystallographic shear performed on an olivine-type structure.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMatrix-isolation and ab initio studies of oxalic acidJ. Nieminen, M. Rasanen, and J. MurtoCite this: J. Phys. Chem. 1992, 96, 13, 5303–5308Publication Date (Print):June 1, 1992Publication History Published online1 May 2002Published inissue 1 June 1992https://pubs.acs.org/doi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas-phase dissociation mechanisms of dilithiated disaccharides: tandem mass spectrometry and semiempirical calculations.Andreas Staempfli, Zhongrui Zhou, and Julie A. LearyCite this: J. Org. Chem. 1992, 57, 13, 3590–3594Publication Date (Print):June 1, 1992Publication Histor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotophysics of entwined porphyrin conjugates: competitive exciton annihilation, energy-transfer, electron-transfer, and superexchange processesAnne M. Brun, Stephen J. Atherton, Anthony Harriman, Valerie Heitz, and Jean Pierre SauvageCite this: J. Am. Chem. Soc. 1992, 114,…
Fatigue of ferroelectric polarization and the electric field induced strain is investigated in lead lanthanum zirconate titanate ceramics. Fatigue rate increases as the coercive field or the hysteretic nature of the electric field induced polarization of the ferroelectric ceramics increases. The ferroelectric polariza…
Lattice parameter data of cubic phases and cube roots of unit cell volumes of tetragonal phases in homogeneous ZrO 2 ‐containing solid solutions were compiled to examine the validity of Vegard's law. Except for ZrO 2 –CeO 2 and ZrO 2 –UO 2 systems, the data for cubic phases were expressed by the equation d = a s X + b…
Secondary-electron emission and Auger spectroscopies and total-secondary-electron-yield measurements have been employed to monitor the transformation of type-IIa diamond (110) induced by 1-keV Ar irradiation for a dose range between 7\ifmmode\times\else\texttimes\fi{}${10}^{12}$ and 6.2\ifmmode\times\else\texttimes\fi…
Ion-exchange in glass is a simple, flexible technique to realize optical fiber-compatible planar waveguide devices. Recently, neodymium-doped waveguide lasers operating at 1060 and 1300 nm have been demonstrated in this technology. Lasers operating at 1540 nm are desirable for telecommunication applications and the au…
Abstract The electrochemical quartz crystal microbalance has been employed to investigate the electropolymerization of pyrrole in a variety of aqueous electrolytes. In contrast to the generally accepted cation–radical coupling process for the electropolymerization of pyrrole, an electrochemically initiated chain polym…