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。
Abstract Macromolecular data processing is an extensive topic, which has been developed considerably in recent years with the advent of commercially available area detectors and the new Laue methods utilising synchrotron radiation. Rather than giving what could only be a superficial overview of all aspects of data pro…
Abstract The purpose of this study is to develop a steady‐state thermal model for melt spinning of polyester fiber by incorporating the radial heat conduction inside the fiber and the combined effect of radiation and convection at the boundary. The governing equations are obtained from the energy, mass, and momentum b…
Abstract The influence of compatibilization on the dynamic mechanical properties of polypropylene (PP) binary blends with polyamide‐11 (PA) has been investigated. In the blends an acrylic acid functionized PP was used as a blend component and compared with nonfunctionized PP over the who concentration range. The resul…
Abstract Binary blend of high‐density polyethylene (HDPE) and linear low‐density polyethylene (LLDPE), prepared by melt mixing in an extruder, in the entire range of blending ratio, is studied for crystallization behavior by differential scanning calorimetry (DSC) and X‐ray diffraction measurements. Cocrystallization…
Abstract A novel cellulose solution, prepared by dissolving an alkali‐soluble cellulose, which was obtained by the steam explosion treatment on almost pure natural cellulose (soft wood pulp), into the aqueous sodium hydroxide solution with specific concentration (9.1 wt %) was employed for the first time to prepare a…
The isolation of chitosan from a fungal source offers the potential of a product with controlled physicochemical properties not obtainable by the commercial chemical conversion of crustacean chitin. A variety of culture and processing protocols using Mucor rouxii were studied for their effects on biomass yield and chi…
Phason-strained octagonal quasicrystal phases of Mo-Cr-Ni have been studied by electron diffraction and dark-field imaging. The shifting of some of the diffraction spots lowers the symmetry from eightfold to fourfold. Diffraction patterns of the orthogonal twofold axes show that the shifted spots are split along the f…
A procedure for the patterned synthesis of porous Si exhibiting visible luminescence is described. Anodic electrochemical etch of n- or p-type Si in ethanol/HF solution leads directly to porous Si that luminesces with λmax between 750 and 650 nm. Positive and negative patterns of luminescent porous Si are etched into…
The growth of diamondlike films and overlayers by the depsotion of energetic carbon atoms has been investigated by molecular-dynamics simulations. The interatomic many-atom potential suggested by Tersoff is used. The structurel analysis of the grown films shows that there is an energy window between 40 and 70 eV for t…
We have studied the stability of the luminescence from porous Si in the presence of a variety of ambient gases (e.g., N2, H2, forming gas, and O2). Although the optical properties are fairly stable under most conditions, illumination in the presence of O2 causes a substantial decrease in luminescence efficiency. Infra…
Analytic results are presented for the dynamic behavior of sliding charge-density waves (CDW's) and related extended nonlinear systems with randomness. It is shown that, in the limit of long times, a sliding configuration approaches a unique solution. In CDW models, the velocity of this asymptotic solution is periodic…
On the basis of different types of experiments, the authors develop implicitly the model of surface-enhanced Raman scattering (SERS) of adsorbates on metal surfaces. The long-range enhancement by resonances of the macroscopic laser and Stokes field is separated quantitatively from the metal electron-mediated resonance…
The performance of a new type of grid-supplemented corona voltage stabilizer and regulator (TCVSR) device is described. The normal corona wire-plane voltage stabilizer and regulator was provided by a grid above the anode. The slopes of the stabilization curve have been found to be strongly dependent on the grid voltag…
An experimental program was conducted to determine the role of boric acid on the pitting behavior of alloy 600 steam generator tubes. The test solution consisted of 5620 wppm Cl−, 3984 wppm SO4=, and 500 wppm Cu++ yielding a Cl−/SO4= ratio of 1.4. Boric acid was added in amounts of 0, 50, 100, 200, 500, 1000, and 2000…
The fructose-1,6-bisphosphate aldolase gene of Drosophila melanogaster contains three divergent copies of an evolutionarily conserved 3' exon. Two mRNAs encoding aldolase contain three exons and differ only in the poly(A) site. The first exon is small and noncoding. The second encodes the first 332 amino acids, which…
Abstract The paper is concerned with the discussion of the different mechanisms proposed for plasma‐induced (initiated) polymerization. This new approach to polymer synthesis proceeds through a free radical mechanism, but presents some peculiar characteristics. The initiation reaction is practically instantaneous and…
<div class="htmlview paragraph">The demands for longer lifetimes of cars have meant that the durability of radiators has also become more important, particularly with regard to the resistance to external corrosion due to environmental pollution. In this paper corrosion mechanisms, as well as some preventive meas…
Abstract Infrared spectra of uniaxially drawn ß‐PVDF films under the influence of an electric field were registered. The direction and the strength of the applied field were changed in up to 13 cycles. The field‐induced frequency changes of the bands at 445 cm −1 (CF 2 ‐rocking) and 510 cm −1 (CF 2 ‐bending) were stud…
The crystal structure of anhydrous lithium formate, published recently by Kansikas and Hermansson, is in fact that of a quenchable high-temperature modification (LiHCOO-I). The low-temperature modification LiHCOO-II can be obtained by thermal dehydration of the monohydrate, LiHCOO · H 2 O , or by drying it over P 4 O…
Abstract Electrocatalytic reduction of l-cystine (CySSCy) was examined on glassy carbon electrodes coated with the title conductive polymer in which Pt, Pd, Cu, Ag, and Hg thiolates were fixed. Pt and/or Pd thiolate fixed in the polymer behaved as excellent electrocatalytic active sites for reductive cleavage of the s…