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。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of .alpha.,.omega.-Diisopropenyloligopropylene by Thermal Degradation of Isotactic PolypropyleneTakashi Sawaguchi, Tadashi Ikemura, and Manabu SenoCite this: Macromolecules 1995, 28, 24, 7973–7978Publication Date (Print):November 1, 1995Publication History Publis…
An experimental procedure is presented which allows the analysis of the angular dependence of the coercivity of polycrystalline samples ${\mathit{H}}_{\mathit{c}}$(\ensuremath{\theta}) in terms of the angular dependence of the switching field of the individual grains forming the material, ${\mathit{H}}_{\mathit{s}}$(\…
Abstract The 1-ethyl-2, 6-dimethyl-4(1 H )-pyridinone, trihydrate C 9 H 13 NO · 3H 2 O (EDMP) is a potential nonlinear optical crystalline material for second harmonic generation till the near ultraviolet region, crystallizing in the monoclinic space group Cc with Z = 4 and the unit cell parameters a = 8.382(1) Å, b =…
Abstract Electrochemical localized corrosion tests in substitute ocean water at 40°C and 70°C and ASTM G48 tests in 6% FeCl 3 solution were performed on three classes of stainless steels: Ni‐austenitic (both traditional and with high nitrogen content ones), high nitrogen Mn‐austenitic nickel free and duplex (both trad…
Formate dehydrogenase from Desulfovibrio vulgaris Hildenborough, a sulfate-reducing bacterium, has been isolated and characterized. The enzyme is composed of three subunits. A high molecular mass subunit (83,500 Da) is proposed to contain a molybdenum cofactor, a 27,000 Da subunit is found to be similar to the Fe-S su…
Abstract Mixtures of zeolite and phosphate rock react to release cations and anions into soil solution through dissolution and ion exchange. These mixtures have the potential to serve as slow‐release sources of nutrients in synthetic soils. The term zeoponics has been used to describe such systems. Research was conduc…
Abstract Four isotropic polymers, poly(butylene terephthalate) (PBT), polycarbonate (PC), polyethersulfone (PES) and polysulfone (PSU), were blended by extrusion with a thermotropic liquid crystalline polymer (LCP) at different temperatures. The morphology of extrudates was observed by means of scanning electron micro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, Structures, and Magnetism of Barium/Rare-Earth/Bismuth Double Perovskites. Crystal Structures of Ba2MBiO6 (M = Ce, Pr, Nd, Tb, Yb) by Powder Neutron DiffractionWilliam T. A. Harrison, Kenneth P. Reis, Allan J. Jacobson, Lynn F. Schneemeyer, and Joseph V. WaszczakC…
Ternary blends consisting of thermoplastic and thermotropic immiscible polymers were studied. Both thermodynamic and kinetic considerations were found to affect their multiphase structure. Thermodynamics is expressed by means of spreading coefficients, whereas the kinetic effect is driven by the dispersed phase viscos…
The 1:2 ordering in Ba(Ni 1/3 Nb 2/3 )O ceramics sintered at 1350‐1500°C has been investigated by using XRD and Raman spectroscopy. Both of the techniques show that the degree of the 1:2 ordering decreases as the sintering temperature increases. However, XRD discerns the 1:2 ordering only for the samples sintered at 1…
Well-defined poly(ethylene oxide) (PEO) with a cyano group at one end and a hydroxyl group at the other terminus was synthesized by the anionic ring opening polymerization of ethylene oxide (EO) initiated with (cyanomethyl)potassium (CMP) which was prepared by the metalation reaction of acetonitrile with potassium nap…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT29Si NMR Observation of an Amorphous Magnesium Silicate Formed during Impregnation of Silica with Mg(II) in Aqueous SolutionJean-Baptiste d'Espinose de la Caillerie, Maggy Kermarec, and Olivier ClauseCite this: J. Phys. Chem. 1995, 99, 47, 17273–17281Publication Date (Print)…
This comprehensive reference book covers properties, selection, processing, and applications of the most widely used nonmetallic engineering materials. The focus is on two main groups of materials: polymeric materials and ceramics and glasses. Compiled from the four-volume Engineered Materials Handbook series, this si…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConductivity Relaxation of 1-Methyl-2-pyrrolidone-Plasticized Polyaniline FilmHsun-Tsing Lee, Kuen-Ru Chuang, Show-An Chen, Pei-Kuen Wei, Jui-Hung Hsu, and Wunshain FannCite this: Macromolecules 1995, 28, 23, 7645–7652Publication Date (Print):November 1, 1995Publication Hist…
The accumulation of free lysine in tobacco seed triggers the stimulation of lysine-ketoglutarate reductase, an enzyme that acts in lysine catabolism. The mechanism of lysine-ketoglutarate reductase stimulation was studied in two different systems: (1) developing seeds of wild-type plants in which the low basal lysine-…
We describe a well-tolerated blood pool contrast agent with extended recirculatory half-life based on paramagnetic polymerized liposomes (PPLs). PPLs were constructed from a new type of polymerizable lipid molecule that has a derivative of gadopentetate dimeglumine as the hydrophilic head group and diacetylene groups…
In recent years aromatic polyether ketones have achieved a remarkable position among other thermoplastic polymers because of their unique combination of toughness, stiffness, thermooxidative stability, chemical and solvent resistance, electrical performance, flame retardancy, and retention of physical properties at hi…
The high strain rate behavior of two different tungsten-based composites (WBCs) has been investigated using a combination of compression Kolsky bar and high strain rate pressure—shear plate impact experiments. The two materials investigated are (a) a W/(WNiFe) “heavy alloy” containing 91 wt.% W with a WNiFe matrix…
Recent studies of amorphous solid materials have revealed the possibility that more than one distinct amorphous phase may be formed from the same substance. In analogy with the phenomenon of crystalline polymorphism, this behavior has been termed “amorphous polymorphism”. We review the experimental manifestation of am…
The liquid silicone RTV (room temperature vulcanizing) coating has gained considerable popularity since the first field trial in 1973 with an experimental product and the first large-scale application in 1987 with a commercial product. Although few problems have been encountered with the first generation coating, it b…