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。
We propose a pathway leading from erythrose-4-phosphate and glutamate to nitrogen 1 and carbons 5,5', and 6 of the pyridoxine ring. This pathway, which parallels the phosphorylated pathway of serine biosynthesis, is predicted on the homology between PdxB and SerA, the structural similarity between serine and 4-hydroxy…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray crystal structures of the 1,3,2-benzodithiazolyl dimer and 1,3,2-benzodithiazolium chloride sulfur dioxide solvate: comparison of the molecular and electronic structures of the 10-.pi.-electron C6H4S2N+ cation and the C6H4S2N.bul. radical and dimer and a study of the v…
Polarized neutron diffraction essentially measures discrete spatial 3D Fourier components of the magnetization density inside a single crystal, which is known to obey symmetry requirements. Due to restricted and noisy data sets, the standard analysis, which involves the computation of the inverse Fourier transform of…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Nino Grizzuti, Silvana Cavella, Paolo Cicarelli; Transient and steady‐state rheology of a liquid…
The formation of a vitreous silica surface in the presence of water vapor is investigated through the molecular dynamics simulation technique. Three-body potentials are employed to describe the interatomic interactions. The structure of the reconstructed surface is analyzed with respect to the concentration and type o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlkali metal recognition induced isomerization of spiropyransMasahiko Inouye, Masaru Ueno, Teijiro Kitao, and Kikuo TsuchiyaCite this: J. Am. Chem. Soc. 1990, 112, 24, 8977–8979Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published i…
Based on thermodynamic principles a theory for equilibrium interfacial segregation is proposed for perovskite materials, and this theory is applied to BaTiO 3 . An approach developed by Frenkel and refined by Kliewer and Koehler is extended to undoped ternary oxide materials such as BaTiO 3 . The approach uses regular…
Abstract The influence of composition on phase size in immiscible polymer blends is examined both experimentally and theoretically. It was found for eight noncompatibilized blends, of widely varying particle size morphology, that a master curve of phase size versus log‐relative composition could be obtained by shiftin…
A number of Pseudomonas species have been identified which accumulate a polyhydroxyalkanoate containing mainly 3-hydroxydecanoate monomers from sodium gluconate as the sole carbon source. One of these, Pseudomonas sp. strain NCIMB 40135, was further investigated and shown to accumulate such a polyhydroxyalkanoate from…
Experiments simulating carbonate diagenesis have been performed using natural oolitic and skeletal sediments in seawater at temperatures of 183-186 °C and hydrostatic pressures of 6-10 MPa. During the experiments both equant and granular/columnar calcite cements were precipitated. Equant cements developed when both nu…
Uranium dioxide fuels irradiated in a commercial BWR during 1 to 4 cycles (burn-up: 6–28 GWd/t) have been annealed in an out-of-pile condition and the release rate of 85Kr was measured continuously. The annealing temperature ranged 1,500–1,800°C. The effects of temperature and burn-up have been studied on burst releas…
This article reviews children's ideas about radiation and radioactivity and identifies several common areas of misunderstanding. A new approach to teaching the topic at school level, which seeks specifically to address these known difficulties, is then proposed and outlined.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTristrontium dialuminum hexaoxide: an intricate superstructure of perovskiteJ. A. Alonso, I. Rasines, and J. L. SoubeyrouxCite this: Inorg. Chem. 1990, 29, 23, 4768–4771Publication Date (Print):November 1, 1990Publication History Published online1 May 2002Published inissue 1…
A proposed model for interfacial segregation in perovskites, with induced heterogeneous defect distributions, is extended here to account for the formation of internal boundary layer devices, such as positive temperature coefficient of resistance (PTCR) thermistors and internal boundary layer capacitors (IBLC). Bounda…
We study a triangular network containing two kinds of Hooke springs with different natural lengths. If the two spring constants are the same, we can solve the model exactly and show that Vegard's law is obeyed, irrespective of whether the bonds are arranged randomly or in a correlated way. A more complete description…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReevaluation of the surface tension components and parameters of polyacetylene from contact angles of liquidsC. J. Van Oss, R. F. Giese Jr., and R. J. GoodCite this: Langmuir 1990, 6, 11, 1711–1713Publication Date (Print):November 1, 1990Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA comparison of relaxation time distributions obtained from dynamic light scattering and dynamic mechanical measurements for high-molecular-weight polystyrene in entangled solutionsTaco Nicolai, Wyn Brown, Soeren Hvidt, and Kurt HellerCite this: Macromolecules 1990, 23, 24,…
The evolution of the cold deformation microstructure is described for medium to high stacking fault energy, single phase fcc metals. Macroscopic strain accommodation for polycrystalline metals is considered, and it is suggested that grains subdivide during deformation on a smaller and smaller scale, and that each volu…
The phenomenon of electromechanical failure of zirconia has been examined. It is shown that spatial variation of electronic conductivity in a predominantly oxygen ion conductor can lead to internal precipitation of molecular oxygen and its pressurization. Internal pressures high enough to crack zirconia can develop if…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSequence-regulated oligomers and polymers by living cationic polymerization. 2. Principle of sequence regulation and synthesis of sequence-regulated oligomers of functional vinyl ethers and styrene derivativesMasahiko Minoda, Mitsuo Sawamoto, and Toshinobu HigashimuraCite th…