Materials Literature
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The formation of adsorbed films at the free surface of aqueous solutions of sodium hexadecanoate was observed by microscopy at the Brewster angle. A phase transition between a gas and a tilted phase occurs during these slow formations. The tilt of the molecules creates an observable optical anisotropy. We observed cir…
Recently reported light-scattering studies of ${\mathrm{CaKNO}}_{3}$ and Salol are reanalyzed, using the extended version of the mode-coupling theory of the liquid-glass transition including activated transport or hopping effects. Problems found in the original fits due to the neglect of hopping terms are largely corr…
MEED (maximum-entropy electron density) is a program package to calculate the electron-density distribution from a set of structure-factor data by the maximum-entropy method. MEED is an upgraded version of the original maximum-entropy program, MEMTARO, which was used in the first study to use the maximum-entropy metho…
Preface Introduction 1. Fundamentals of macromolecular crystallography 2. Fundamentals of macromolecular structure 3. Sources and properties of synchrotron radiation 4. Synchrotron radiation instrumentation 5. Monochromatic data collection 6. The Laue method 7. Diffuse X-ray scattering from macromolecular crystals 8.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular photoinduced charge separation and charge recombination of the product ion pair states of a series of fixed-distance dyads of porphyrins and quinones: energy gap and temperature dependences of the rate constantsTsuyoshi Asahi, Masaya Ohkohchi, Ryohzi Matsusaka…
STRAT is a Fortran program to optimize the efficiency of data collection on an X-ray area detector system, starting with the crystal in any arbitrary alignment. The high speed of the algorithm makes it possible to select the `best' combination of crystal rotations from a large list of possibilities. The program is app…
Equilibrium relationships in the system Al 2 O 3 ‐Ce 2 Si 2 O 7 in inert atmosphere have been investigated in the temperature range 900° to 1925°C. A simple eutectic reaction was found at 1375°C and 51 mol% Ce 2 Si 2 O 7 . A high‐low polymorphic transformation in Ce 2 Si 2 O 7 was observed at 1274°C. New XRD patterns…
Abstract Computer simulations of the molecular motion of polymer chains in the presence of a strong nematic field were carried out by the method of Brownian dynamics. Two models were studied: the first model (linear liquid crystal) is a freely jointed chain with rigid bonds, the second model (comb‐like liquid crystal)…
Abstract Eine bisher noch nicht beschriebene hexagonale Hochtemperatur‐Modifikation von Al 2 S 3 konnte in reiner Form entweder durch chemischen Transport mit Iod (860 → 750°C) oder durch Tempern von α ‐Al 2 S 3 oberhalb 550°C erhalten und durch eine Einkristall‐Röntgenstrukturanalyse charakterisiert werden. Die neue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTG2 ab initio calculations on the thermochemistry of phosphorus-nitrogenohydrogen [P,N,Hn] (n = 0-2) and [P,N,Hn]+ (n = 0-3) species and on the potential energy surfaces of [P,N,H3]+ singlet- and triplet-state cationsM. Esseffar, A. Luna, O. Mo, and M. YanezCite this: J. Phys…
Abstract The deformation behavior of rubber toughened poly(methylmethacrylate), RT‐PMMA, has been investigated in terms of the ability of the material to nucleate plasticity. Work‐hardening rate parameter K measurements in the early stages of the nonelastic response in a constant strain‐rate test are used to probe the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFirst example of a mixed-ligand bimetallic (Fe-Fe) N-bridged dimer: (.mu.-nitrido)[((tetraphenylporphyrinato)iron)(phthalocyaninato)iron]C. Ercolani, S. Hewage, R. Heucher, and G. RossiCite this: Inorg. Chem. 1993, 32, 13, 2975–2977Publication Date (Print):June 1, 1993Public…
Strain-induced anomalous grain growth has been investigated in pure nickel. It was found that slow heating to a holding temperature of 1000[ddot]C greatly increased the proportion of anomalous growth compared with isothermal annealing at 1000[ddot]C. There were also differences in the misorientation distributions of t…
The Technology of Chromium Oxide Passivation on Stainless Steel Surface, Ohmi, Tadahiro, Ohki, Atsushi, Nakamura, Masakazu, Kawada, Koji, Watanabe, Tsuyoshi, Nakagawa, Yoshinori, Miyoshi, Shinji, Takahashi, Shinji, Chen, Michael S. K.
Studies of the corrosion of pure iron showed green rust, approximately Fe42+Fe23+(OH)12(Cl,OH)2, was a stable corrosion product at high pH and low Eh in the presence of chloride. The structure, constitution, preparation, and characterization of green rust was reviewed. A diagram relevant to the corrosion of iron in ce…
The U─Zr─C tertnary phase diagram is optimized by graphical and numerical curve fitting of self‐consistent thermodynamic and phase diagram data reported in the literature. The system is described from 2473 to 3693 K using isothermal ternary phase diagrams. The solidus and liquidus curves of the U x Zr 1−x C y solid so…
We present a theoretical and experimental study on the diffraction characteristics of gratings, with particular attention focused on the effects of polarization. The goal of our study is to develop multifunctional devices for use in a pickup head for optical storage systems. Experiments and numerical calculations are…
Abstract We have performed and analyzed extensive pressure‐volume‐temperature (PVT) measurements on uncrosslinked polybutadiene and polyisoprene elastomers from ambient temperature to about 200°C and 200 MPa. In the polybutadiene series, 1,2 content varied from 8 to 87%, the remainder being similar amounts of cis‐1,4…
The structure and morphology of the corrosion products formed on the surfaces of splat quenched (SQ) Mg–16Al (wt-%) alloy specimens immersed in a 3% NaCl solution saturated with Mg(OH)2 have been studied. X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, and analytical electron microscopy of th…
The fat contents of fried batter coatings were reduced significantly (7–28%) when 1% powdered cellulose (fiber length in excess of 100 microns) was incorporated into the batter. In addition, moisture and dry material contents were increased significantly in these coatings. Although fat reductions were observed in both…