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。
In the elastomer-modified (polyamide-6/poly(phenylene ether) (PA6/PPE) = 50/50 blends, poly(styrene-co-maleic anhydride) (SMA) was demonstrated to be an efficient reactive compatibilizer. The G1651 elastomer was shown to be an effective impact modifier to result in superior toughness and heat-deflection temperature (H…
The characteristics of electrochemically prepared polycarbazole (PCARB) as the cathode active material for secondary batteries are studied in aqueous electrolytes. The cell of the type Zn/Zn(ClO4)2/PCARB has a specific capacity of 30 Ah/kg and an energy density of 46 Wh/kg. The coulombic efficiency is about 80–90% and…
A well-defined styrene–acrylonitrile copolymer/montmorillonite (SAN-MMT) nanocomposite has been prepared by emulsion copolymerization of styrene and acrylonitrile in the presence of sodium ion exchanged montmorillonite (Na+-MMT). This direct and one-step polymerization technique yielded nanocomposites intercalated wit…
Assessments of dew-, water-, and enzyme-retted fibers for differences in fineness, strength, caustic weight loss, acid detergent fiber, neutral detergent fiber cellulose, hemicellulose, lignin, carbon, hydrogen, nitrogen, lipid, ash, and nine minerals were compared in this study. Distinct differences in retted-fiber s…
The isothermal phase diagram for poly(vinylidene fluoride)/dimethyl formamide/water system was derived. The binodal and spinodal were calculated based on the Flory–Huggins theory and the calculated binodal was approximately in agreement with the experimental data of the cloud points. The isothermal crystallization lin…
The relationships between the properties and structure are discussed for poly(vinyl alcohol)(PVA)/silica composites prepared through the sol-gel process. The composites became stiff and brittle with increasing the silica content. The properties of the composites were changed drastically at around the composition of PV…
Dilute solutions of glycogen from mussels (shellfish) and of different degradation steps were investigated by static and dynamic light scattering, viscometry, and end group analysis of the reducing end. The data were analyzed in comparison with theory for hyperbranched polymers. In the monomer of the A type, the funct…
Unexpected electron transfer and linkage isomerization led to the formation of FeII0.23FeIII0.72MnIII0.02MnIV0.03[MnIV(CN)6]0.23[MnIII(CN)6]0.72[FeIII(CN)6]0.02[FeII-(CN)6]0.03 from the reaction of [FeII(NCMe)6]2+and [MnIV(CN)6]2−. Hydration leads to further electron transfer and linkage isomerization to form {FeII0.1…
Salene–FeIII complexes of the types LFeCl and [LFe(CN)2]− were treated with organometallic reagents to introduce the cyanide-linked units (CO)5Cr, (CO)5Mo, (CO)5W, Cp(CO)2Fe, Cp(dppe)Fe, and Cp(PPh3)2Ru. IR spectra and structure determinations revealed that all resulting complexes contained M–CN units with N coordinat…
Calculations of the phonon spectrum of an In 4 Te 3 crystal in the central pair-interaction model neglecting long-range forces are reported. The model developed contains 19 unknown parameters, which were determined from experimental values of the displacements of individual sublattices in the unit cell and from the ch…
The structure of crystallites (regions of coherent scattering — RCS), which comprise the grains of ultradisperse diamond (UDD) powder, was investigated by x-ray crystallography and coordination-sphere diffractometry. It was established that the RCS have an average size $$\bar L = 42 \pm 2{\AA}$$ and that these regions…
The Yafet-Kittel model for a two-sublattice ferrimagnet with an antiferromagnetic exchange interaction in one of the sublattices was developed to describe magnetic-field-induced phase transitions in the isotropic and Ising cases. Depending on the relative values of the exchange parameters of the inter-sublattice inter…
A simple method of data analysis, called the averaging technique, is presented which may be useful in long-term field measurements of temperature dependent thermal conductivity of insulating materials. Its mathematical basis is the integral statement, which follows from the heat conduction equation For lin ear depende…
With the fundamental work of Hofstadter on the combined effects of band structure and magnetic field on the electronic states in two dimensions (2D) as a starting point, we numerically study the effects on the Hofstadter butterfly of including a binary distribution of on-site potentials on a 2D lattice in the tight-bi…
La1−xSrxMnO3 is a perovskite-type magnetic material. LaMnO3 and SrMnO3 are antiferromagnetic insulators while the system becomes a ferromagnetic metal in a certain Sr concentration. In ∼0.2<x<∼0.5, it shows a so-called colossal magnetoresistance (CMR) which is a phenomenon of a huge resistivity drop when…
In a severe accident of light water reactors, the reactor coolant system (RCS) piping might be subjected to thermal loads caused by the decay heat of the deposited fission products and the heat transfer from the hot gases, with an internal pressure in some accident sequences. Tests on the RCS piping failure were perfo…
New statistical characteristics are suggested for analyzing nonwoven fabric irregularity. These characteristics are based on the concept of outliers of random field irregularity beyond (or beneath) a fixed level, and allow the area and volume of these outliers to be determined. Outlier statistics are studied and resul…
The surface and bulk magnetic structures of Sr-M-type single-crystal hexagonal ferrites (with the chemical formula SrFe 12− x Al x O 19 ) have been directly compared by simultaneous gamma, x-ray, and electron Mössbauer spectroscopy. It was found, that when the magnetic lattice of Sr-M hexagonal ferrites is slightly di…
Phosphorylating archaeal D-glyceraldehyde 3-phosphate dehydrogenases (GraP-DHs) share only 15-20% identity with their glycolytic bacterial and eukaryotic counterparts. Unlike the latter which are NAD-specific, archaeal GraP-DHs exhibit a dual-cofactor specificity with a marked preference for NADP. In the present study…
A new kind of large dispersion lower order blaze grating spectrometer is built. The design is based on the use of uncustomary large angles of incidence and diffraction approaching 80°. The double diffraction optical scheme is employed to fit the design conception. A set of compact size grating spectrometers of various…