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。
Porous, multicomponent silicate gels were heated in flowing and pressurized ammonia. These treatments resulted in dense, homogeneous oxynitride (O‐N) glasses which were synthesized at low temperature (∼1000°C) without melting. The O‐N glasses exhibited increased microhardness and glass‐transition temperature and alter…
Exponentially growing cells of Bacillus subtilis and Escherichia coli were Gram stained with potassium trichloro(eta 2-ethylene)platinum(II) (TPt) in place of the usual KI-I2 mordant. This electron-dense probe allowed the staining mechanism to be followed and compared with cellular perturbations throughout the stainin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotocatalytic conversion of primary amines to secondary amines and cyclization of polymethylene-.alpha.,.omega.-diamines by an aqueous suspension of titanium(IV) oxide/platinumSeiichi Nishimoto, Bunsho Ohtani, Tadao Yoshikawa, and Tsutomu KagiyaCite this: J. Am. Chem. Soc.…
Etude de l'influence de la structure du fer colloidal sur la croissance de la diatomee marine cotiere Thalassiosira pseudonana
The stability relations of prehnite and epidote were experimentally determined for the bulk composition of Ca2Al2FeSi3O12(0H) + excess H2O using conventional hydrothermal apparatus and solid oxygen buffer techniques. Three starting materials were used: (I) mixtures of natural prehnite and hematite, (II) mixtures of sy…
Filiform corrosion occurs on painted metals and cannot be prevented by conventional corrosion inhibitors. In order to better understand the corrosion phenomena, the literature was reviewed and the characteristics exhibited by filiform corrosion on different metals were cataloged. Calculations were performed to select…
The phase diagram of a one-dimensional many-electron system with site-diagonal electron-phonon(e-p) coupling and short-ranged inter-site electron-electron(e-e) repulsion as well as intra-site one is studied within the mean field theory for electrons and in the adiabatic limit for phonons. The theory covers the whole r…
An electromagnetic theory for the light absorption by a cluster of metal spheres and the Raman scattering by a molecule adsorbed on it is presented, which takes into account the retardation effect exactly and is applicable to an arbitrary cluster size. The theory is applied to a two-sphere cluster of Ag and Au. It is…
Ferroelectric films of lead zirconate titanate (PZT) have been fabricated by rf planar magnetron sputtering. Films having a resistivity >106 Ω cm and a dielectric constant >800 at 300 K have been achieved using 100% oxygen as a sputtering medium, 10% excess PbO added to the target, and appropriate post-d…
Abstract The results of this work suggest a practical route to hot-oil-resistant thermoplastic elastomers based on NBR and a polyolefin resin (such as polypropylene). Although these two types of polymer are normally grossly incompatible with each other, a melt-mixed blend thereof is technologically improved by the pre…
Evaluation of the velocity and stress time correlation functions of a liquid, using a simple but speculative model for liquid state dynamics, leads to a relation between self-diffusion and viscosity. The result resembles the Stokes–Einstein formula, and agrees reasonably well with experimental data.
The microzonation of photosynthetic organisms in four cyanobacterial mats of Solar Lake, Sinai, was studied by light and scanning electron microscopy. The zonation was compared to the distribution of photosynthesis and of O 2 , H 2 S, and pH. Microelectrodes were used to measure the chemical gradients as well as the p…
The Euclidean normalizers of space groups form the appropriate mathematical tool for several problems treated independently by crystallographers in the past, e.g. the comparison, the classification and the standardized description of crystal structures. Explicit tables are presented that enable the user to handle Eucl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of [7]circuleneKoji Yamamoto, Tadashi Harada, Masao Nakazaki, Takuo Naka, Yasushi Kai, Shigeharu Harada, and Nobutami KasaiCite this: J. Am. Chem. Soc. 1983, 105, 24, 7171–7172Publication Date (Print):November 1, 1983Publication History Publish…
Neutron diffraction study on the layer compounds MnPS 3 and FePS 3 reveals a collinear antiferromagnetic order, respectively, below T N =78 K and 120 K with the corresponding wave vectors k =[000] and [\(00\frac{1}{2}\)], the magnetic moments pointing to the direction perpendicular to the layer planes for both cases.…
Thin-film gradient-index profiles have been analyzed and new profiles have been synthesized for broadband antireflection coatings on dielectric surfaces. It is shown that the control of the index gradient as a design parameter can significantly enhance the performance of interference coatings.
The surface treatment of polystyrene, which is required to make polystyrene suitable for cell adhesion and spreading, was investigated. Examination of surfaces treated with sulfuric acid or various oxidizing agents using (a) x-ray photoelectron and attenuated total reflection spectroscopy and (b) measurement of surfac…
Influences of particle size on surface-enhancement processes are discussed in terms of a simple physical model. When the size of a silver sphere is increased, the magnitude of the enhancement exhibits a slight increase followed by a strong decrease. Simultaneously the plasmon resonance is shifted and severely broadene…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoluminescence and photoinduced oxygen adsorption of colloidal zinc sulfide dispersionsWilliam G. Becker and Allen J. BardCite this: J. Phys. Chem. 1983, 87, 24, 4888–4893Publication Date (Print):November 1, 1983Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSilafunctional compounds in organic synthesis. Part 20. Hydrogen peroxide oxidation of the silicon-carbon bond in organoalkoxysilanesKohei Tamao, Neyoshi Ishida, Tatsu Tanaka, and Makoto KumadaCite this: Organometallics 1983, 2, 11, 1694–1696Publication Date (Print):November…