Materials Literature
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The fourfold dissociation of superdislocations in Ni3Al has been recorded on images that were formed using second-order reflections, and the dissociation distances of the Shockley partial dislocations that bound a complex stacking fault (d CSF) have been measured. Comparisons with computer simulated (2g · 5g) images h…
We present a new approach to magnetostriction that is formulated to describe materials with large magnetostriction. The main idea of the theory is to derive precisely from lattice considerations the potential wells of the anisotropy energy. The theory exhibits frustration in the sense explored by the authors in the ri…
Oil sorption capacities of various natural and man-made fibrous sorbents were compared in a simulated seawater bath containing oil. Natural sorbents such as milkweed, kapok, cotton, and wool showed higher sorption capacities than man-made sorbents such as polyester, polypropylene, viscose rayon, nylon 6, nylon 66, and…
Abstract Additional well-crystallized kaolin from Washington County, Georgia, has been supplied to the Clay Minerals Society Source Clay Repository to replace the exhausted supply of KGa-1. This kaolin is called KGa-1B and is from a geographic location and stratigraphic position close to where KGa-1 was collected. Sli…
Raman spectra of tetragonal zirconia were studied for the systems ZrO 2 ‐Y 2 O 3 , ZrO 2 ‐CeO 2 , ZrO 2 ‐Y 2 O 3 ‐Nb 2 O 5 , and ZrO 2 ‐Y 2 O 3 ‐Ta 2 O 5 There was no change in the Raman bands for tetragonal ziraconia in the ZrO 2 ‐Y 2 O 3 system as a function of Y 2 O 3 content . On the other hand, in the ternary sys…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOptical characterization of anodic aluminum oxide films containing electrochemically deposited metal particles. 1. Gold in phosphoric acid anodic aluminum oxide filmsCarolyn K. Preston and Martin MoskovitsCite this: J. Phys. Chem. 1993, 97, 32, 8495–8503Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and characterization of colloidal silver-platinum alloysKanjiro Torigoe, Yoshifumi Nakajima, and Kunio EsumiCite this: J. Phys. Chem. 1993, 97, 31, 8304–8309Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 A…
Lutetium oxyorthosilicate Lu_2(SiO_4)O has two crystallographically independent lutetium sites. When it is doped with Ce, the dopant Ce is assumed to occupy two different sites, and thus the existence of two activation centers is proposed. UV and gamma-ray excited spectra clearly indicate that two activation centers e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of hyperbranched polyurethanes prepared from blocked isocyanate monomers by step-growth polymerizationRalph Spindler and Jean M. J. FrechetCite this: Macromolecules 1993, 26, 18, 4809–4813Publication Date (Print):August 1, 1993Publication Histo…
A protein phosphatase (PPase) from the bacteriophage lambda was overexpressed in Escherichia coli. The recombinant enzyme was purified to homogeneity yielding approximately 17 mg of enzyme from a single liter of bacterial culture. Biochemical characterization of the enzyme showed that it required Mn2+ or Ni2+ as an ac…
When a constant metastable solution of the Cahn–Hilliard equation is subjected to a spatially localized large-amplitude perturbation, a transition process may be triggered leading to a globally stable stationary solution. In one space dimension, the existence and instability of a third stationary solution with the sam…
A new transition-state theory model has been proposed that is based on the concept that the dynamics of small molecules dissolved in dense polymers is coupled to the elastic thermal motion of dense polymers but can be treated separately from their structural relaxation. The model has been used to study the dynamics of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA molecular-dynamics study of polyethylene crystallizationT. A. Kavassalis and P. R. SundararajanCite this: Macromolecules 1993, 26, 16, 4144–4150Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.…
Explosive in the solid state, the bis(η2-peroxo) complex 1, which in solution is the active species in the epoxidation of olefins with [CH3ReO3], could be characterized by X-ray crystallography as the diglyme adduct 2. Under catalytic conditions (excess of H2O2), 1 is far more stable than in the free state.
Silicon nitride materials typically reveal thin amorphous intergranular films along grain boundaries, with only the exception of special boundaries. It is known that such grainboundary films strongly affect the high‐temperature properties of the bulk material. High‐resolution electron microscopy (HREM) was used to stu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBuilding-block synthesis of porphyrin light-harvesting arraysSreedharan Prathapan, Thomas E. Johnson, and Jonathan S. LindseyCite this: J. Am. Chem. Soc. 1993, 115, 16, 7519–7520Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published in…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonte Carlo studies of dendrimer macromoleculesMarc L. Mansfield and Leonid I. KlushinCite this: Macromolecules 1993, 26, 16, 4262–4268Publication Date (Print):August 1, 1993Publication History Published online1 May 2002Published inissue 1 August 1993https://pubs.acs.org/doi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAll-aromatic hyperbranched polyesters with phenol and acetate end groups: synthesis and characterizationS. Richard Turner, Brigitte I. Voit, and Thomas H. MoureyCite this: Macromolecules 1993, 26, 17, 4617–4623Publication Date (Print):August 1, 1993Publication History Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, molecular structure, and reactivity of (alkylperoxo)copper(II) complexNobumasa Kitajima, Tsutomu Katayama, Kiyoshi Fujisawa, Yusaku Iwata, and Yoshihiko MorookaCite this: J. Am. Chem. Soc. 1993, 115, 17, 7872–7873Publication Date (Print):August 1, 1993Publication…
Abstract New classes of polymers and oligomers whose backbone consists of a network of delocalized π electrons have recently been synthesized and show electrical and non‐linear optical properties of great interest for new technologies. The vibrational spectra of these materials show peculiar features which, if properl…