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 commonly used buffer, 2,2-bis(hydroxymethyl)-2,2′,2″-nitrilotriethanol (Bis-Tris) coordinates lanthanide(III) ion strongly in water to form molecular species that are highly active for the hydrolysis of a phosphate diester, bis(4-nitrophenyl) phosphate.
The structure/property relationships in a series of melt-spun poly(ethylene terephthalate) (PET) fibers processed under different conditions have been investigated. The structure of the fibers was characterized using a variety of techniques, including gel permeation chromatography (GPC), differential scanning calorime…
The effect of grain size on the overall elastic and plastic properties of nanocrystalline materials has been evaluated using the elastoplastic finite element method. The tensile deformation behaviour of nanocrystalline copper (based on a unit cell model comprising 2–100 nm sized copper crystallites and 1nm wide grain…
Triple-stranded bimetallic helicates [Ln2(LC –2H)3] form in water by a strict self-assembly process and are shown to be thermodynamically very stable (log β23 > 26) and luminescent (Ln = Eu).
The thermal decomposition of acetonitrile in the temperature range 1350–1950 K is modeled with a reaction scheme containing 23 species and 43 elementary reactions. Values of {[product]t/[CH3CN]0}/t, which were reported in a previous investigation are computed with this scheme at 50 K intervals and are compared with th…
Two new 1,7-disubstituted-1,4,7,10-tetraazacyclododecane ligands, DO2P and DO2PME, and their complexes with Mg(2+), Ca(2+), Sr(2+), Mn(2+), Zn(2+) and Ln(3+) were prepared and characterized by pH potentiometry. The pH titration data showed that DO2P and DO2PME both form 1:1 M:L complexes with all divalent and trivalen…
This paper describes the refinement method of quantitative electron diffraction using the convergent beam method, with emphasis on the algorithm and experimental measurements. Two examples are given. One is the lattice parameter measurement by comparing calculated and experimental CBED pattern using correlation and im…
Multifactor surface aging of anhydride cured epoxides was studied. Three systems based on diglycidyl ether of bisphenol A (DGEBA) and cycloaliphatic epoxy were investigated. They were submitted either to a solar irradiation alone, or to a tangential ac electric field, or to both stresses in a laboratory setup or outdo…
This study was conducted to establish a simple method for evaluating the morphology of fine anisometric particles using size measurement techniques. The size distributions of mica particles and carbon fibers classified into narrower size ranges were measured by gravitational sedimentation and laser diffraction techniq…
Article An X-Ray Diffraction Study of the Crystalline to Amorphous Phase Change in Cellulose During High-Energy Dry Ball Milling was published on January 1, 1998 in the journal Holzforschung (volume 52, issue 5).
Methane elimination during thermolysis of GaMe3 with PhHNNH2 yields sequentially dimeric [Me2Ga{µ-N(H)N(H)Ph}]2, tetrameric [MeGa{µ-N(H)NPh}]4 and, ultimately, GaN; the X-ray structure of the tetramer shows a novel Ga4N8 cage.
In the present work, rubber-toughened polypropylenes (TPOs) with different properties of the rubbery phase, consisting in different degrees of rubber dispersion and different levels of rubber crystallinity, were considered. The flame-treated surfaces of these materials and their interfaces with a commonly used primer…
A correlation between the hydrophobic characteristics and accumulation of static charge on several insulating surfaces (ceramic and non-ceramic) is studied. Although numerous experimental studies on the loss and recovery of hydrophobicity on insulator surfaces have been carried out, no efforts for establishing a corre…
B6O sintered compacts were prepared by high pressure and temperature treatments of in-laboratory synthesized B6O powder. Sinterable B6O powder with grain sizes of 1.2-1.4μm was formed above 1300°C in 4 hours in a pure argon stream by a solid-liquid reaction between amorphous boron and B2O3 powders. Single phase sinter…
We present new experimental results of the backscattering coefficient (η) for C, Al, Cu, Ag and Au targets bombarded with low energy electrons (0.6-6 keV) at normal angles of incidence. The present data show a clear monotonic increase in the backscattering coefficient with increasing target atomic number for electrons…
Control of the surface areas of the calcined zirconium(iv) oxides arises from the extent of equilibration permitted between the hydrolysed zirconyl oxychloride and the surfactant prior to calcination. The properties of the zirconia–surfactant materials, which are formed by a scaffolding and controlled drying mechanism…
The porosification of silicon can be achieved by the partial electrochemical dissolution (anodization) of the surface of a silicon wafer. The degree of porosity is dependent on the anodization parameters and can generally be controlled within the constraints imposed by substrate dopant type and concentration. Control…
Abstract Thin-section production of diamict samples presents many problems, primarily as a result of incomplete impregnation. This problem is investigated in diamicts of known glacial, glaciomarine, and subaerial origin. The inherent sedimentological characteristics, rather than particular mode of de-position, appears…
Cellulose acetate phthalate (CAP) is a commonly used enteric coating polymer. CAP powder has been studied by various methods to determine characteristics that have an influence on its functionality. While some of the parameters are well known, such as free-acid content and substituent composition, new methods have bee…
Solutions of type I acid soluble collagen were studied in light and electron microscopy at concentrations over 40 mg/ml. Banded patterns spontaneously emerge in samples observed between crossed polars between slide and coverslip. The textures are interpreted as precholesteric, appearing at the transition between the i…