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。
A series of copolymers of glycine and DL-lactic acid with various compositions was synthesized and their in vivo and in vitro degradation behavior was studied. For the in vivo examination, discs of the copolymer films were subcutaneously implanted in rats. The in vitro studies were carried out in phosphate buffer at p…
Thermodynamic calculations were performed on the Si‐N‐O system, and the results are discussed in relation to the thermal oxidation of crystalline Si 3 N 4 . Based on our previous oxidation results at temperatures in the range of 1200°–1400°C and oxygen partial pressures of 0.05–1.0 atm in oxygen‐argon or oxygen‐nitrog…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSquare-planar complexes of platinum(II) that luminesce in fluid solutionJuan A. Zuleta, Carlos A. Chesta, and Richard EisenbergCite this: J. Am. Chem. Soc. 1989, 111, 24, 8916–8917Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Publishe…
We propose a gradient-dependent flow theory of plasticity for metals and granular soils and apply it to the problems of shear banding and liquefaction. We incorporate higher order strain gradients either into the constitutive equation for the flow stress or into the dilantancy condition. We examine the effect of these…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymorphic structures and molecular vibrations of syndiotactic polystyreneMasamichi Kobayashi, Takahiko Nakaoki, and Nobuhide IshiharaCite this: Macromolecules 1989, 22, 11, 4377–4382Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Publ…
Oxidation of [RuII(OEP)(CO)] [H2OEP = octaethylporphyrin] by m-chloroperoxybenzoic acid in methanol gave [RuVI(OEP)(O)2], isolated as air-stable diamagnetic purple solid (μeff ∼ 0 μB). [RuVI(OEP)(O)2] shows one intense IR band at 821 cm-1 assignable to vas(O=Ru=O) stretch. In CH2Cl2, it reacts with olefins to give epo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA polyelectrolyte brush theorySanjay Misra, Sasidhar Varanasi, and P. P. VaranasiCite this: Macromolecules 1989, 22, 11, 4173–4179Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 November 1989https://pubs.acs.org/doi/…
BaTiO 3 thin films have been prepared in situ on Ti metal substrates by a hydrothermal electrochemical technique, where a direct current has been passed between the anode, Ti plate, and the cathode, Pt plate, in high-temperature, high-pressure Ba 2+ solutions. Dense thin films, 0.1∼0.3 µm thick, which consist of cubic…
The structure of isocitrate dehydrogenase [threo-DS-isocitrate: NADP+ oxidoreductase (decarboxylating), EC 1.1.1.42] from Escherichia coli has been solved and refined at 2.5 A resolution and is topologically different from that of any other dehydrogenase. This enzyme, a dimer of identical 416-residue subunits, is inac…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of cation substitution on the tantalum ditelluride distortionStephen Lee and N. NagasundaramCite this: Chem. Mater. 1989, 1, 6, 597–601Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 November 1989https://pubs.…
The luminescence of under x‐ray excitation is reported. Emission is observed from several manifolds. In some cases it is possible to distinguish between emission from Gd 3+ on the site and emission from Gd 3+ on the site.
Some of the factors that must be taken into account in designing with SF/sub 6/ are discussed. These factors include the effect of field inhomogeneities on the electrode which reduce the dielectric strength in SF/sub 6/ and the effect of SF/sub 6/ decomposition byproducts on the materials used in SF/sub 6/-insulated s…
Abstract Several series of novel compounds have been prepared containing dicyanomethylidene groups including 1‐alkyl‐3‐dicyanomethylideneindol‐2‐ones and 6,6‐dicyanofulvenes. Their visible absorption properties are recorded and discussed.
An enlarged set (atomic number Z = 2 to 98) of free-atom X-ray atomic scattering (form) factors for high angles [2 ≤ (sin θ)/λ ≤ 6Å-1] has been calculated based on those of Doyle & Turner [Acta Cryst. (1968). A24, 390-397]. Four-parameter 'exponential polynomial' fits for these are presented which give far more accura…
Highly crystalline Li x MoS 2 was synthesized, and the lithium content was electrochemically varied between x ~ 0 and x ~ 1. There were five different phases each with a different lithium content. The crystal lattices had small triclinic or monoclinic distortions from 1T-hexagonal symmetry. These discoveries contradic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerromagnetic behavior of linear-chain organometallic complexes. Structural and magnetic properties of 1:1 decamethylferrocenium salts of planar radical anion bis(dithiolato)metalatesJoel S. Miller, Joseph C. Calabrese, and Arthur J. EpsteinCite this: Inorg. Chem. 1989, 28,…
Struvite and hydroxyapatite were precipitated from artificial urine onto the surfaces of catheter materials by the controlled addition of urease. They were precipitated both together and separately (by omitting components of the artificial urine), and with and without the inclusion of albumin (which was intended to mi…
Abstract not Available.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and reactivity of oxovanadate anions in layered lithium aluminate materialsJen Twu and Prabir K. DuttaCite this: J. Phys. Chem. 1989, 93, 23, 7863–7868Publication Date (Print):November 1, 1989Publication History Published online1 May 2002Published inissue 1 Novembe…
A detailed redescription of the mechanically interacting structural elements of the lingual apparatus of the domestic chicken, Gallus gallus, revealed the functional and constructional role of organized connective tissue (i.e., ligaments and fasciae) as structural elements that ensure the proper biomechanical interact…