Materials Literature
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Macroscopic fluid motion can have dramatic consequences near the isotropic-nematic transition in fluids of nematogens. We explore some of these consequences using both deterministic and stochastic descriptions involving coupled hydrodynamic equations of motion for the nematic order parameter and fluid velocity fields.…
The clpB gene in Escherichia coli encodes a heat-shock protein that is a close homolog of the clpA gene product. The latter is the ATPase subunit of the multimeric ATP-dependent protease Ti (Clp) in E. coli, which also contains the 21-kDa proteolytic subunit (ClpP). The clpB gene product has been purified to near homo…
Hydrogenation of diamond has been carried out using the electron-cyclotron-resonance microwave plasma chemical-vapor deposition apparatus. According to reflection high-energy and low-energy electron diffraction and X-ray photoelectron spectroscopy measurements, the natural- and synthetic-diamond surfaces maintained th…
A study of the mechanical characteristics of a unidirectional fiber–reinforced calcium aluminosilicate matrix composite has been conducted. The properties have been related to the individual properties of the matrix, the fibers, and the interfaces, as well as the residual stress, using available models of matrix crack…
A versatile approach to dendritic polyesters and their use in the preparation of two different types of novel macromolecular architectures represent dendritic block copolymers is described. The chemistry developed for the synthesis of dendritic polyesters involves generation growth through an esterification step using…
Epitaxial growth of BaTiO3 and SrTiO3 films by the reactive evaporation method was investigated using reflection high-energy electron diffraction (RHEED). The investigations were carried out using two growth methods: coevaporation and alternate evaporation of the metal elements in an oxygen atmosphere. Atomic layer gr…
Abstract In 1984 physicists discovered a monster in the world of crystallography, a structure that appeared to contain five-fold symmetry axes, which cannot exist in strictly periodic structures. Such quasi-periodic structures became known as quasicrystals. A previously formulated theory in terms of higher dimensional…
Anodic properties of solid oxide fuel cells have been evaluated for several anode/electrolyte systems. Anodic over‐voltage of metal/yttria‐stabilized zirconia (YSZ) interface was related with metal‐oxygen bonding strength and was the smallest for the Ni anode in the present study. The anodic polarization conductivity…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA comparison of electrochemical and gas-phase decomposition of methanol on platinum surfacesK. Franaszczuk, E. Herrero, P. Zelenay, A. Wieckowski, J. Wang, and R. I. MaselCite this: J. Phys. Chem. 1992, 96, 21, 8509–8516Publication Date (Print):October 1, 1992Publication His…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of electrically conducting copolymers of aniline and anthranilic acid: evidence for self-doping by x-ray photoelectron spectroscopyH. S. O. Chan, S. C. Ng, W. S. Sim, K. L. Tan, and B. T. G. TanCite this: Macromolecules 1992, 25, 22, 6029–603…
Electrostriction, the mechanical strain x resulting from electric polarization P, is a second order effect: x = QP 2. In this paper, the phenomenological and physical origins of the Q coefficients are discussed from a qualitative point of view. As pointed out by von Hippel, the mechanisms of electric polarization are…
Compact, readily-programmable formulas are given for the vibrational dynamic dipole polarizability (αv) and hyperpolarizabilities (β v and γv) for polyatomic molecules. They are based on perturbation theory and should replace those presented by us previously.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBlocked photochromism of diarylethenesMasahiro Irie, Osamu Miyatake, and Kingo UchidaCite this: J. Am. Chem. Soc. 1992, 114, 22, 8715–8716Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Published inissue 1 October 1992https://pubs.acs.or…
The polarization behavior of La-modified lead zirconate titanate relaxors has been investigated for various electrical and thermal histories. The field-cooled and zero-field-cooled behaviors were both studied. The magnitude of both polarizations were found to be equal above a critical temperature. A macroscopic polari…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility of C60 in organic solventsN. Sivaraman, R. Dhamodaran, I. Kaliappan, T. G. Srinivasan, P. R. Vasudeva Rao, and C. K. MathewsCite this: J. Org. Chem. 1992, 57, 22, 6077–6079Publication Date (Print):October 1, 1992Publication History Published online1 May 2002Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphological alterations during texture-producing plastic plane strain compression of high-density polyethyleneA. Galeski, Z. Bartczak, A. S. Argon, and R. E. CohenCite this: Macromolecules 1992, 25, 21, 5705–5718Publication Date (Print):October 1, 1992Publication History P…
Using light and electron microscopy, we investigated the in vivo distribution of liposomes sterically stabilized by specific lipids which prolong their circulation in blood. Tissue distribution of sterically stabilized liposomes composed of distearoyl phosphatidylcholine:cholesterol:monosialoganglioside GM1 (10:5:1)-e…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
We report the infrared and optical reflectance spectrum of semiconducting N-dimethyl thiomorpholinium (tetracyanoquinodimethane${)}_{2}$ at temperatures above and below the structural phase transition. Polarized measurements were made on several faces of large single crystal samples. For polarization close to the tetr…
Abstract For the purpose of developing a simple and quantitative description of the rate of reactions occurring in the Thermal DeNO x process, the kinetics of the homogeneous reaction between NO and NH 3 with excess of O 2 has been studied in an isothermal plug flow reactor. Temperature windows of NO reduction were ob…