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。
Conducting polymers are extensively used against electromagnetic interference. Unusually high electromagnetic shielding efficiency has been observed for inherently conducting polymer-coated metal/polymer composites.
Electron energy-loss spectrometry enables the detection of Li and Be via the K ion- ization edges. However, the detection and quantification of these low energy edges present several problems, like low edge-to-background ratios, problems with background extrapolations, overlapping of edges and multiple scattering in c…
Alkaloids 1-4 from Cynanchum vincetoxicum (asclepiadaceae) (Scheme 1) do not have affinity to the oestrogen receptor but they inhibit the growth of the hormone-independent mammary carcinoma cells MDA-MB-231 (Fig. 1) and bind to nucleosides and nucleotides (Table 1). Intercalation was not observed.
Oxygen plasma treatment as a surface functionalization technique is discussed. Oxygen-containing functionalities were introduced on the surface of high- (HDPE) and low-density polyethylene (LDPE) by glow discharge. The number of surface hydroxyl groups was increased by a post-discharge wet treatment in a reducing solu…
A theory is presented for the variation of the polydispersity index measured in a dynamic light scattering experiment performed on a suspension of aggregating colloidal particles. The analytical forms of this index, calculated by cumulants analysis, are described for various models of colloidal aggregation and numeric…
A carbon soot formed by arc evaporation and activated by heating under carbon dioxide is found to have a surprisingly high internal micropore volume (> 0.25 ml g–1) and an apparent BET surface area of ca. 700 m2 g–1, a large proportion of the pores are ca.⩽5 Å; transmission electron microscopy shows a highly disordere…
Potentiometric and calorimetric data for the complexation of lanthanide(III) cations by the neutral nitrogen-donor ligands diethylenetriamine or triethylenetetramine in anhydrous dimethyl sulfoxide at 25 °C and in an ionic medium of 0.1 mol dm–3 NEt4ClO4 have been obtained. All the complexes are strongly enthalpy stab…
Antonius Herry Cahyana, Yoshihiro Shuto, Yoshiro Kinoshita; Antioxidative Activity of Porphyrin Derivatives, Bioscience, Biotechnology, and Biochemistry, V
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface structure determination of thin films of benzimidazole on copper using surface enhanced Raman spectroscopyMary L. Lewis, Lars Ledung, and Keith T. CarronCite this: Langmuir 1993, 9, 1, 186–191Publication Date (Print):January 1, 1993Publication History Published onlin…
The room‐ and high‐temperature mechanical properties or a high‐strength, sintered silicon carbide were evaluated Room‐temperature strength was measured in four‐point bending. The room‐temperature fracture toughness was determined using a precracked single‐edge‐notched beam (SENB) bridge indentation technique. The high…
Description 23 papers written by internationally renowned scientists and engineers cover: • Heat Treatment: Carburizing and Through-Hardening • Surface Modification • Powder Metallurgy • Corrosion Resistant Bearing Steels • New Bearing Steels • Improvement of Rolling Contact Fatigue Life • New Bearing Steel Making Pro…
Cordierite powders have been obtained by the combustion of aluminum nitrate, magnesium nitrate, magnesium oxide, silica fume, ammonium nitrate, and urea mixtures. The thermal evolution of crystal phases has been studied using X-ray diffraction patterns and IR spectra. Magnesia derived cordierite attained 97% theoretic…
Four crystalline forms of tegafur were prepared by recrystallization from different solvents (α-, β-, δ-forms) and by heating (γ-form). They have been characterized using powder X-ray diffraction, thermal analysis, microscopy, density measurements and infrared spectroscopy. From differential scanning calorimetry measu…
The structure of rumbrin (Fig. 1), a new cytoprotective substance, was elucidated by NMR spectral analysis. Rumbrin was found to possess a novel skeleton containing alpha-pyrone, tetraene and pyrrole moieties.
Gas phase oxidation of benzene to phenol has been studied using Pd–Cu composite catalysts which were prepared mainly by impregnating the respective metal salts on silica gel. If one of the two metal species is absent from the catalyst, no catalytic activity is observed. Good performance is obtained with catalysts havi…
The photoluminescence of the layered titanates, K2Ti2O5, Na2Ti3O7, and K2Ti4O9 has been investigated. K2Ti2O5 showed a strong blue luminescence at room temperature. The luminescence of K2Ti2O5 was strongly affected by water intercalation and H+ exchange.
Contact angles have been obtained for four different liquids on surfaces of particles and plates coated with three different polymers, to give three different surface energies. The advancing contact angles on flat plates measured by the sessile drop and Wilhelmy plate methods were in very close agreement (ca 1°) over…
Differential scanning calorimetric (DSC) studies have been performed on binary mixtures of organic liquids at temperatures down to 100 K over the entire concentration range. The liquids investigated are simple liquids such as chlorobenzene and bromobenzene in cis-decalin and o-terphenyl. All the binary liquids exhibit…
The first silica-pillared titanoniobate has been prepared by firstly intercalating layered titanoniobate with NH2(CH2)3Si(OEt)3 and subsequently thermally removing the interlayered organics, the resulting pillared material is porous and has a high thermal stability beyond 750 °C.
CuO–ZnO–Al2O3 mixed oxides with different Cu : Zn : Al atomic ratios were obtained by thermal decomposition of hydroxycarbonate) precursors at 623 K in air for 24 h. Both precursors and mixed oxides were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectrosco…