Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect electrochemical synthesis of X2InCH2X compounds (X = Br, I) and a study of their coordination chemistryTheodore A. Annan, Dennis G. Tuck, Masood A. Khan, and Clovis PeppeCite this: Organometallics 1991, 10, 7, 2159–2166Publication Date (Print):July 1, 1991Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio molecular orbital calculations on the electronic structure of sodium silicate glassesTakashi Uchino, Matae Iwasaki, Tetsuo Sakka, and Yukio OgataCite this: J. Phys. Chem. 1991, 95, 14, 5455–5462Publication Date (Print):July 1, 1991Publication History Published onli…
Fourier transform infrared (FTIR) transmission spectroscopy was used to monitor the decomposition of NH3 and ND3 on silicon surfaces. Experiments were performed in situ in an ultrahigh vacuum (UHV) chamber using high surface area porous silicon samples. The FTIR spectra revealed that NH3 (ND3) dissociatively adsorbs a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA high-valent oxomanganese dimer containing bridging and terminal inorganic phosphate ligandsJoseph E. Sarneski, Mary Didiuk, H. Holden Thorp, Robert H. Crabtree, Gary W. Brudvig, J. W. Faller, and Gayle K. SchulteCite this: Inorg. Chem. 1991, 30, 14, 2833–2835Publication Da…
To evaluate potential catalytic mechanism for thioltransferase thiol-disulfide exchange reactions, seven pig liver mutants were constructed by site-directed mutagenesis. All the expressed enzymes, including wild-type and mutants with the exception of the inactive mutant, ETT-C22S, were variably inhibited by iodoacetam…
Abstract A systematic investigation of the dynamic mechanical properties of high‐density polyethylene (HDPE)/high‐impact polystyrene (HIPS)/copolymer blends was carried out. Blends of 80/20 weight percent of HDPE/HIPS were prepared in the melt state at 180°C in a batch mixer. Synthesized pure diblock (H77) and tapered…
Electrochromic nickel oxide films were deposited by radio-frequency magnetron sputtering of a Ni target in gas mixtures of Ar and O2. When electrochemically cycled in 0.1 N KOH solution, large reversible changes in visible absorption were obtained within the first 10 bleach/color cycles. Films which showed the greates…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization kinetics in the mixtures of poly(vinylidene fluoride) and poly(methyl methacrylate): two-step diffusion mechanismHiromu Saito, Tetsuo Okada, Toshihiko Hamane, and Takashi InoueCite this: Macromolecules 1991, 24, 15, 4446–4449Publication Date (Print):July 1, 1…
Ribbons were annealed in the demagnetized state with one wall along the ribbon middle. This wall becomes pinned during the heat treatment. Reentrant reversal occurs when reverse domains are nucleated at the ribbon edge with a threshold field larger than the demagnetizing field; this wall does not annihilate when it me…
Smectic-A nucleating in the isotropic phase presents various bulk focal conic defects close to the interface, within the “bâtonnets” first described by Friedel and Grandjean in 1910. We experimentally study the stability of the “bâtonnets” in a high-frequency aligning electrical field. Although the external shape appe…
The interactions of bacteria isolated from corroded copper coupons on thin films of copper evaporated onto germanium internal reflection elements were evaluated nondestructively in real time by attentuated total reflectance Fourier transform infrared spectroscopy. The films were stable in the presence of flowing or st…
Abstract Thermoplastic elastomers based on blends of polyolefins are an important family of engineering materials. Their importance arises from a combination of rubbery properties along with their thermoplastic nature in contrast to thermoset elastomers. The development of polyolefin thermoplastic elastomer blends fol…
Abstract Compounds having structural units formed by transition metals and hydrogen have only become known fairly recently. Only the synthesis and structural characterization of ternary metal hydrides A x M y H z in which A is an alkali or alkaline‐earth metal and M is a transition metal, led to the discovery of anion…
We extend previous work on the Khokhlov-Semenov approach to long-range order in solutions of persistent flexible main-chain polymers by including hexagonal columnar ordering. The description of long-range positional order uses a recent model developed for rigid rodlike particles, which is based on the tradeoff of tran…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign and synthesis of new ferroelectric liquid crystals. 14. An approach to the stereocontrolled synthesis of polar organic thin films for nonlinear optical applicationsDavid M. Walba, M. Blanca Ros, Noel A. Clark, Renfan Shao, Michael G. Robinson, Jian Yu Liu, Kristina M.…
Boron-doped diamond epitaxial films were characterized on the dependence of boron concentration by an optical microscope, reflection high-energy electron diffraction, secondary ion mass spectrometry, Hall effect measurement and metal contacts. These films were grown on synthesized single-crystal diamonds(100) by micro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical and experimental study of diamagnetic and paramagnetic products from thermal and light-induced alkyl transfer between zinc or magnesium dialkyls and 1,4-diaza-1,3-butadiene substratesMartin Kaupp, Hermann Stoll, Heinzwerner Preuss, Wolfgang Kaim, Thomas Stahl, Ge…
It is shown that UV-excited porous Si (PS) exhibits an efficient visible photoluminescence (PL) at room temperature. The PS layers were formed by anodization of p-type and n-type single-crystal Si wafers in aqueous HF solutions. The peak wavelength of PL spectra depends on the anodization parameters including the resi…
For 45 years, the Bulgarian uranium industry operated behind an impenetrable veil of secrecy. As this veil is slowly lifted, the breadth and structure of the industry are becoming apparent-and so are the problems. Bulgaria`s uranium industry began in 1945 with the evaluation of several uranium mineral occurrences in t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlled cooling crystallization of ammonium sulfate in the ternary system ammonium sulfate-ammonium nitrate-waterCheong Song Choi and Ik Soo KimCite this: Ind. Eng. Chem. Res. 1991, 30, 7, 1588–1593Publication Date (Print):July 1, 1991Publication History Published online1…