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 process to produce cube oriented 3% Si-1% Mn steel sheets with a fine grain structure is introduced. The process consists of a conventional double stage cold-rolling and a decarburizing stack anneal with SiO/sub 2/-containing reactive separators for steels with an approximated chemistry of 3% Si-1% Mn-0.05% C. An al…
We report on the growth of polarity-controlled ZnO epilayers by plasma-assisted molecular-beam epitaxy and the measurement of valence-band offset at the ZnO/GaN heterointerface. The polarity of ZnO epilayers is determined by coaxial-impact-collision ion-scattering spectroscopy. The band offset is determined by ultravi…
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 Aleš Kralj, Ted Prodan, Igor Emri; An apparatus for measuring the effect of pressure on the time-…
Abstract The engineering plastic polyamide 6 (PA6) was effectively pulverized to ultra‐fine powder through a sell‐made pan‐type milling equipment. A laser Diffraction Particle Size Analyzer and TEM were used to examine the particle size and the distribution of PA6 powder. The results show that the average particle siz…
The complexation ability of new polypodal carboxylic ligands prepared from 2,2-bis(hydroxymethyl)-1-alkanols was investigated in aqueous solution with Y3+ and various lanthanide ions (La3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+). The values of the stability constants for ML complexes are of the order of 104 for the hexadentate…
We have performed X-ray specular and off-specular measurements of free-standing polystyrene thin films as a function of molecular weight and thickness. The results show films thicker than a few radii of gyration ( R g ) are well fit by a simple liquid model. This confirms the assumption that the anomalies previously r…
A novel bromoboron trinitro-subphthalocyanine (BTN-SubPc) thin film has been developed for write-once optical recording by vacuum evaporation. The spectral and optical properties of the film are studied. Some information may be useful when dealing with recording applications, such as uniformity and anisotropy of this…
The N-acetylneuraminate lyase from Clostridium perfringens was expressed in Escherichia coli as a fusion protein with a His-tag and purified to homogeneity using metal chelate affinity and anion exchange chromatography. The purified enzyme has a pH optimum of 7.6 and a temperature optimum of 65-70 degrees C. In kineti…
Ferromagnetic shape memory refers to the behavior of certain alloys that undergo a reversible martensitic transformation and are also ferromagnetic. They undergo the usual shape memory effect by changing temperature, and they can also be made to undergo large changes of shape by applying a magnetic field. Alloys with…
The chemical environment of oxygen in cobalt-containing metal oxides with compositions MxM(x−1)′O and MxM(3x−1)′O4 (M,M′=Mn,Ni,Co) has been studied by Auger, x-ray and ultraviolet photoelectron, and high resolution electron energy loss spectroscopies. While there is a single type of lattice oxygen in the bulk structur…
The effects of planar‐defect density in a β‐SiC starting powder and the addition of α‐SiC seeds to that powder on microstructural evolution in liquid‐phase‐sintered (LPS) SiC have been studied separately. Planar‐defect density is altered by appropriate heat treatment of an as‐received β‐SiC starting powder. It was fou…
The optical properties of different quantum dot–quantum well (QDQW) structures and of CdS-core dots have been studied utilizing photoluminescence (PL), fluorescence line narrowing (FLN), photoluminescence excitation (PLE), and double-beam PL spectroscopy. The FLN spectra of the CdS core showed resonant Raman lines, di…
The bacterial phosphoenolpyruvate:sugar phosphotransferase system (PTS) includes a collection of proteins that accomplish phosphoryl transfer from phosphoenolpyruvate (PEP) to a sugar in the course of transport. The soluble proteins of the glucose transport pathway also function as regulators of diverse systems. The m…
The reaction of a silsesquioxane trisilanol with methylmagnesium chloride leads to an unprecedented tetranuclear magnesium silsesquioxane complex 1 in high yield. The crystal structure shows an unusually short Mg-Cl bond, indicative of an electron-deficient magnesium atom; 1 has been used as transmetalation agent for…
In this article, we present a previously unreported morphology of bacterially precipitated calcite (determined using XRD, FTIR, and SAED) occurring subaqueously in Weebubbie Cave. Observations using FESEM and TEM revealed spindle-shaped crystals with curved [hk.0] faces lying parallel to the c-axis. Calcite precipitat…
The magnetic properties and structural phase transformations of Heusler alloys Ni/sub 2+x/Mn/sub 1-x/Ga and Ni/sub 2-x/Mn/sub 1+x/2/Ga/sub 1+x/2/ were investigated. It was found that the martensitic transformation temperature increases and the Curie temperature decreases with decreasing Mn concentration in the Ni/sub…
We report on an extended x-ray absorption fine structure (EXAFS) investigation on the local atomic order around rare earth (RE) ions in Er+Yb doped aluminophosphate glasses. Samples were obtained from the melt and the RE concentration ranged from 0.5 to 5 wt. %. EXAFS data were analyzed within the multiple scattering…
Cone-shaped pores as well as cylindrical pores with tapered ends of various geometrical forms were produced via one-side etching of latent ion tracks in thin polymer foils by applying a hydrostatically controlled, neutralizing counter solution on the membrane side opposite to the etchant. The sizes and shapes of the p…
Ni/sub 1-2x/Mn/sub x/Ga/sub x/ (x/spl sim/0.2 and 0.25) alloys in thin film form were prepared by ion-beam sputtering from alloy targets. For Si[001] substrates the structure/texture of the films are a function of the growth temperature (T/sub g/). The tetragonal martensite structure with a [220] texture was obtained…
A procedure was developed to fabricate oxide‐fiber‐reinforced minicomposites with a dense matrix and evaluate two oxidation‐resistant interface coatings, porous oxide (zirconia‐silica mixture) and monazite. The coatings were evaluated using Nextel TM 720‐fiber‐reinforced Blackglas TM ‐matrix minicomposites. Boron nitr…