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。
b 29 Si and 27 Al MAS‐NMR were performed on NaOH‐activated blast‐furnace slag to better characterize the amorphous and poorly crystalline phases which occur in this system. The unreacted glass has a mainly dimeric silicate structure represented by a broad 29 Si peak (FWHM = 15 ppm) centered at –74.5 ppm [ Q 1 ], with…
The conversion of phosphazene high polymers to useful materials depends on the development of methods to cross-link the macromolecular chains. A number of cross-linking routes have been used, including chemical, photochemical, and high energy radiation techniques. The relationship of the cross-linking processes to ele…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Synthetic Method of Preparing Iodohydrin and Bromohydrin Derivatives through in situ Generation of Hypohalous Acids from H5IO6 and NaBrO3 in the Presence of NaHSO3Haruyoshi Masuda, Kiyoshi Takase, Masahiro Nishio, Akira Hasegawa, Yutaka Nishiyama, and Yasutaka IshiiCit…
Abstract Pipes of an unstabilized medium‐density polyethylene have been pressure tested with internal stagnant water and moderately circulating air as the external medium at temperatures ranging from 70 to 105°C and changes in molecular structure and crystallinity have been studied. The stage III (fracture induced by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPrototypes for the Polaronic Ferromagnet. Synthesis and Characterization of High-Spin Organic PolymersMichael M. Murray, Piotr Kaszynski, David A. Kaisaki, Wonghil Chang, and Dennis A. DoughertyCite this: J. Am. Chem. Soc. 1994, 116, 18, 8152–8161Publication Date (Print):Sep…
A study is reported of the in situ growth of three distinct phases of LiCoO2 by laser ablation deposition on heated substrates in an oxygen background. Films were characterized by x-ray diffraction from which crystal structure, crystal orientation, lattice constants, and phase information were obtained. Electron micro…
The relative phase shift of light transmitted through a liquid crystal television (LCTV) panel as a function of the applied voltage on the LCTV can be obtained by writing a Ronchi grating pattern to the LCTV and measuring the intensities in the diffraction pattern at the Fourier plane combined with the amplitude modul…
The optical absorption spectra of a series of small gold clusters and their cations have been measured, between 1.9 and 5.6 eV, using a method based upon the photodepletion of a molecular beam of their van der Waals complexes containing one and two xenon atoms. This method provides size-specific information even thoug…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoated Semiconductor Nanoparticles: The CdS/PbS System's Photoluminescence PropertiesH. S. Zhou, H. Sasahara, I. Honma, H. Komiyama, and Joseph W. HausCite this: Chem. Mater. 1994, 6, 9, 1534–1541Publication Date (Print):September 1, 1994Publication History Published online1…
Time-resolved velocity interferometry measurements have been made on boron carbide and silicon carbide ceramics to assess dynamic equation-of-state and strength properties of these materials. Hugoniot pecursor characteristics, and post-yield shock and release wave properties, indicated markedly different dynamic stren…
Assuming a saturated ferromagnet, the anomalous crystal structures of the magnetic 3d transition elements Fe, Co, and Ni are explained from simple band-filling arguments. The full-potential linear muffin-tin orbital (FP-LMTO) method is used to calculate the elastic constants (${\mathit{C}}_{11}$, ${\mathit{C}}_{12}$,…
Tomatoes at the turning stage of maturity were coated with corn-zein (CZ) protein film of 5 (0.20), 15 (0.61) and 66 μm (2.60 mil) thickness. O2 transmission rate at 0% RH and 30C and CO2 transmission rate at 0% RH and 21C of protein film were much lower than those of a typical shrink wrap film at 0% RH and 23C. Where…
The article describes molecular dynamics simulations of 4-n-pentyl-4′-cyanobiphenyl (5CB) in the nematic phase at 300 K using two interaction models. The first model comprises united atoms, while in the second, shorter simulation, the hydrogen atoms are explicitly included. Liquid crystalline order parameters were cal…
The space charge measurement technique may be applied to diagnostic technology for high-voltage machines in the near future. The authors review the progress in the various methods of space charge measurement in Japan.>
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThird-Order Nonlinear Optical Properties of Soluble Octasubstituted MetallophthalocyaninesMaria A. Diaz-Garcia, Isabelle Ledoux, Jose A. Duro, Tomas Torres, Fernando Agullo-Lopez, and Joseph ZyssCite this: J. Phys. Chem. 1994, 98, 35, 8761–8764Publication Date (Print):Septem…
Abstract The use of magnesium hydroxide as a fire‐retardant additive in polymers is discussed in terms of its particle characteristics, thermal properties and factors influencing the mechanism of action. Consideration is also given to its role in reducing smoke evolution during polymer combustion.
To understand the role of type V collagen and its spatial interrelationship with type I collagen in bone matrix, the molecule's covalent intermolecular cross-links were structurally characterized. Type V collagen containing alpha 1(V), alpha 2(V) and alpha 1(XI) chains was isolated from bovine bone and reacted with Na…
Ferroelectric BaTiO 3 thin films were prepared on Pt(111)/ SiO 2 /Si(100) substrates at 650° C by the sol-gel method. Film thickness could be varied by repeating a dip coating/heating cycle. The texture of the BaTiO 3 thin films became more dense and homogeneous when the film thickness increased. The crystalline thin…
The mean size of colloidal lead sulfide particles in nanocomposites with organic materials was varied from 4 to 80 nm by addition of sodium dodecyl sulfate or acetic acid. The refractive index and absorption coefficients of the resulting nanocomposites were measured at 632.8 and 1295 nm. The refractive index of the re…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLigand K-Edge X-ray Absorption Spectroscopy as a Probe of Ligand-Metal Bonding: Charge Donation and Covalency in Copper-Chloride SystemsSusan E. Shadle, Britt Hedman, Keith O. Hodgson, and Edward I. SolomonCite this: Inorg. Chem. 1994, 33, 19, 4235–4244Publication Date (Prin…