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。
Direct oxygen determination of MF–AlF3–Al2O3 (M = Li, Na, K) melts in dependence on cryolite ratio and alumina content was performed using the LECO TC-436 Nitrogen/Oxygen analyzer. On the basis of the obtained results the distribution of individual oxyfluoroaluminate species was obtained. The results have confirmed th…
The effects of phenolic additives on the gelation behavior of gelatin gels were investigated using thermomechanical analysis (TMA) for study of gel-melting temperature, dynamic mechanical analysis (DMA) for study of gel-storage modulus and gel-aging stability, viscometry for study of gelation time, and texture analyze…
Glycolysis reaction kinetics of methylene diphenyl diisocyanate-based water-blown polyurethane foams was examined by gel permeation chromatography. Glycolysates were reacted with butyl glycidyl ether to convert toxic aromatic amines to polyols, and their products were identified by 1H-NMR spectroscopy. To examine the…
A measuring method for a conductivity change through a current change during extension deformation or compression deformation of conductive elastomeric composites composed of a polyaniline (PAn)/styrene–butadiene–styrene (SBS) triblock copolymer was established. The composites were prepared by in situ emulsion polymer…
The preparation, X-ray crystal structures and electrochemical properties of bis(2-cyano-1,2-ethanedithiolate)nickelate [Ni(edt-CN)2]2−/−· are described for both oxidation states together with the singlet–triplet behaviour of the PPh4+ salt of the paramagnetic [Ni(edt–CN)2]−· complex.
A large number of competing approaches are currently being investigated around the world to develop crystalline silicon thin film solar cells on foreign substrates. These approaches can be broadly classified according to the crystalline state of the Si films employed: (i) thin film solar cells based on nano- or microc…
This paper presents an analytical procedure for estimating the three-dimensional (3D) elastic properties of a plain-weft-knitted-fabric-reinforced polymer-composite material. The composite material under study is assumed to have mainly reinforcement-fiber yarns and a polymer matrix. The model of Leaf and Glaskin for p…
The cryosorption method is useful for extracting hydrogen isotopes from a helium gas stream with a small amount of hydrogen isotopes. Therefore, in fusion reactors, this method is expected to be applied for the helium glow discharge exhaust gas processing system and the blanket tritium recovery system. To design these…
Six different phosphazene polymers have been synthesized with varying ratios of 2-(2-methoxyethoxy)ethanol and diacetone D-glucofuranose to determine how these pendant groups affect the physical, chemical, and thermal characteristics of these terpolymers. Diacetone D-glucofuranose serves as the hydrophobic substituent…
The mechanisms of reactions causing irreversible inhibition of the activity of enzymes when irradiated in the presence of the recently developed alpha-methyl-6-nitroveratryl-based photolinker [Holmes CP. J. Org. Chem. 1997; 62: 2370-2380] have been investigated. Several experiments based on the interaction of the phot…
The concept of frustrated phase separation is applied to investigate its consequences for the electronic structure of the high T c cuprates. The resulting incommensurate charge density wave (CDW) scattering is most effective in creating local gaps in k-space when the scattering vector connects states with equal energy…
For pt.1 see ibid., previous issue. Soap bubbles are fragile, beautiful phenomena. They're fun to make and play with, and their geometry is as clean and elegant as anything in nature, which makes them particularly suited to computer graphics. In pt.1 I discussed the nature of soap films. These thin sheets of soapy wat…
Single-crystal aluminas are being considered for use in the manufacture of prosthetic heart valves. To characterize such materials for biomedical application, subcritical crack growth by stress corrosion (static fatigue) and by cyclic fatigue has been examined in sapphire along (1100) planes in 24 degrees C humid air…
Ultrahigh molecular weight polyethylene (UHMWPE) samples were implanted with 46 and 80 keV nitrogen ions up to a fluence of 1017 ions cm−2. The modified surface layers were studied by XPS, Fourier transform infrared spectroscopy (FTIR), Rutherford backscattering spectrometry, elastic recoil detection analysis and dyna…
ZnS films were synthesised using a novel electrostatic assisted aerosol jet deposition (EAAJD) technique at temperatures above 450 °C from an aqueous solution of zinc chloride and thiourea. The films showed a mixture of hexagonal and cubic structures and strong preferred orientations, with the c-axis normal to film su…
SiO2–GeO2 films have been synthesized by the sol–gel method starting from an ethanolic solution of Si(OC2H5)4 and Ge(OCH3)4. The coatings have been annealed in air at temperatures ranging between 300 °C and 900 °C. The compositional and microstructural evolution of the samples under thermal annealing has been investig…
The present study was conducted to compare the structure and properties of conventional and so-called “high-crystallinity” (hcr) polypropylene (PP) and to establish characteristic features of the latter that are responsible for its superior thermal and mechanical performance. Moreover, structure–properties relationshi…
The photochemical properties of some lanthanide chelates developed for immunohistochemistry have been studied in water and in solid Langmuir-Blodgett films. The fluorescence and triplet-state lifetimes of 4-(phenylethynyl)pyridine (PET), di[(phenylethynyl)pyridine] (D-PET), phenylterpyridine (PTP) and their tetra- or…
Three thermoplastic polyurethane elastomers (TPUs) were prepared using the prepolymer method. MDI (diphenylmethane-4,4′-diisocyanate) and the polyadipate of 1,4-butanediol (Mw = 2400) were reacted to produce a prepolymer containing unreacted isocyanate groups; chain extenders were different mixtures of 1,4-butanediol…
Low temperature polarized single-crystal absorption and luminescence spectra of Cr(V)-doped YVO4 and the powder luminescence spectrum of Cr(V)-doped YPO4 are reported and discussed. A rich fine structure and strong polarization effects are observed in the near-infrared. Due to a strong interaction of the Cr(V) ion wit…