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。
Stoichiometric zinc aluminate (ZnAl 2 O 4 ) and zinc gallate (ZnGa 2 O 4 ) are simulated in the framework of the shell model, for which a new set of two‐body interatomic potential parameters has been developed. Using these parameters, a reasonable prediction is made for elastic and dielectric constants of ZnAl 2 O 4 a…
During the solution reaction of NaBH4/(NH4)2SO4 in tetraglyme to form borazine, polymeric aminoborane (NH2BH2)x has been isolated as a white powder. The powder was characterized by thermal gravimetric analysis/differential scanning calorimetry, infrared and mass spectroscopies, and powder X-ray diffraction. Solid-stat…
Nanoscale science and technology is today mainly focused on the fabrication of nanodevices. Our approach makes use of lithography processes to build the desired nanostructures directly. The fabrication process involves an electron-beam lithography technique to define metallic microstructures onto which nanometre scale…
The nonlinear dynamics of a spherical cloud of cavitation bubbles have been simulated numerically in order to learn more about the physical phenomena occurring in cloud cavitation. A finite cloud of nuclei is subject to a decrease in the ambient pressure which causes the cloud to cavitate. A subsequent pressure recove…
Concrete strength is highly sensitive to loading procedure, especially in the range of high strain rates. On the basis of experimental results, it is demonstrated that the full loading history must be included in a dynamic constitutive model, not just consideration of the current strain rate. The rate effect is mainly…
Multiple-solvent crystal structure determination (MSCS) allows the position and orientation of bound solvent fragments to be identified by determining the structure of protein crystals soaked in organic solvents. We have extended this technique by the determination of high-resolution crystal structures of thermolysin…
The crystal structure of an infinite inorganic chain consisting of MnII and an N-centered tripodal ligand N,N-(2-pyridylmethyl)[(1-methylimidazol-2-yl)-methyl]glycinate is presented. It exhibits a chiral helical structure with a pitch of two monomeric units (each monomeric unit containing one Mn atom). Each manganese…
Lithium intercalation into has been performed, both chemically and electrochemically, with X‐ray diffraction characterization of the resulting phases at various levels of intercalation‐deintercalation. It is shown that intercalation occurs through a first‐order transition at 3.98 V vs. , which leads to a ‐like structu…
Over the last several decades, it has been established that proteolytic removal of short, non-helical terminal peptides (telopeptides) from type I collagen significantly alters the kinetics of in vitro fibrillogenesis. However, it has also been observed that the protein is still capable of forming fibers even after co…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTInsertion of Dioxygen into a Platinum−Hydride Bond to Form a Novel Dialkylhydroperoxo Pt(IV) ComplexDouglas D. Wick and Karen I. GoldbergView Author Information Department of Chemistry, Box 351700 University of Washington, Seattle, Washington 98195-1700 Cite this: J. A…
A robust correlation between experimentally determinable parameter, B2/B2HS, and protein solubility is explored. Here B2 is the protein solution second virial coefficient and B2HS=2πσ3/3 is the hard sphere second virial coefficient of the protein whose core is described as a sphere with diameter σ. The origin of this…
Flax fibre reinforced epoxy composites were prepared by autoclave moulding technique. Influence of various fibre parameters such as lignin content, pectin content and degree of polymerisation on the composite properties was investigated. Fibre surface modifications such as alkali treatment, silane treatment and isocya…
The experimental evidence that the surface of pure vitreous silica can be hydrophobic imposes strong limitations on possible atomic configurations at that surface. This is due primarily to the fact that the electric field of the partially ionic SiO2 can have very strong interactions with adsorbed polar molecules and w…
Much progress had been made during the last two decades in acoustic and optical methods for measuring charge distributions in dielectrics. A review on this topic is given, which mainly covers the past research activities associated with that at our laboratory. For acoustic methods, we will discuss andoompare the pulse…
The kdpABC operon codes for the high affinity K(+)-translocating Kdp complex (P-type ATPase) of Escherichia coli. Upon expression of this operon in minicells, a so far unrecognized small hydrophobic polypeptide, KdpF, could be identified on high resolution SDS-polyacrylamide gels in addition to the subunits KdpA, KdpB…
Lateral inhomogeneities of grain boundaries caused by partially wetting grain‐boundary phases or pores induced in the grain boundary give rise to current‐constriction resistances close to grain‐to‐grain contacts. The present work presents a quantitative three‐dimensional analysis of the resulting grain‐boundary impeda…
A new synthetic approach to generate mesostructured phosphorus-free titania is reported. Mesostructured hexagonal and lamellar titania were prepared by using the cationic surfactant C 16 TMA + and soluble peroxytitanates in the presence of Na + and TMA +, respectively. Moreover, upon hydrothermal postsynthesis, the la…
High-field and -frequency electron paramagnetic resonance (HFEPR) spectroscopy has been used to study two complexes of high-spin manganese(III), d(4), S = 2. The complexes studied were (tetraphenylporphyrinato)manganese(III) chloride and (phthalocyanato)manganese(III) chloride. Our previous HFEPR study (Goldberg, D. P…
The structural characteristics of spinel (from both theoretical and experimental viewpoints) that are advantageous for producing transparent conducting oxide (TCO) materials are considered. A working hypothesis is presented for finding new TCO materials with spinel structure. Results of tight‐binding energy‐band calcu…
Three cholesterol-based gelators were synthesized which have a monobenzo-18-crown-6 ( 2 ), monoaza-18-crown-6 ( 3 ), and 1,10-diaza-18-crown-6 ( 4 ), respectively. These gelators could gelatinize 8 of 14 organic solvents tested herein, indicating that they possess a versatile gelation ability. Scanning electron micros…