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。
洞爺火山灰降灰以降の岩手火山のテフラの識別を行うため,これらのテフラが模式的に露出することが示されている3地点で,火山ガラスおよび斜方輝石の屈折率を詳細に測定した.また,火山ガラスの色調,発泡形態および微斑晶の含有量を明らかにした.その結果,これまでに野外で識別されている個々のテフラは,鉱物組成.火山ガラスの形態,屈折率および斜方輝石の屈折率が異なり,それぞれをこれらの記載岩石学的特徴から識別できることが明らかとなった.なお,これらのテフラの中には雪浦軽石のように火山ガラスの屈折率が異なる3種類の軽石が混在していることも明らかとなった.岩手火山では,模式地でのテフラの上記記載岩石学的特徴をカタログ化すれば,層準未知のテフラを同定で…
Gatelite-(Ce), ideally (Ca 1 REE 3 ) Σ=4 [Al2(Al,Mg)(Mg,Fe,Al)] Σ=4 [Si 2 O 7 ][SiO 4 ] 3 (O,F) (OH,O) 2 , is a newly identified mineral from the Trimouns talc deposit, Luzenac, Ariège, French Pyrenees. The mineral occurs as striated colorless crystals finely intergrown with minute lamellae of törnebohmite- (Ce). Asso…
Zhang, Q. and Britton, M.G. 2003. A micromechanics model for predicting dynamic loads during discharge in bulk solids storage structures. Canadian Biosystems Engineering/Le genie des biosystemes au Canada 45: 5.21 5.27. A two-dimensional microstructure mechanics model has been developed for predicting dynamic pressure…
Abstract NMR has benefited tremendously from superconducting magnet technology providing stable, ever increasing magnetic fields over the last few decades. However, since superconductors expel magnetic field and with no suitable material in sight this trend has come to a halt at ∼20 T, and resistive magnet designs are…
Standard raw materials, kaolin and talc, were used in synthesis of cordierite ceramics. Cordierite mass corresponded to 2MgO-2Al2O3- 5SiO2 composition. Synthetized cordierite was used as a refractory filler in the ceramic layer for evaporative polystyrene patterns in the new casting technology, Lost Foam Process. Cord…
Probe beam deflection during chronoamperometric oxidation-reduction of osmium complex in layer-by-layer self-assembled redox active polyelectrolyte multilayers has shown that the nature of the charge in the topmost layer determines the ion flux that balances the redox charge.
The existing methods of studying hydrogen sulfide (H2S) corrosion and its inhibitors were critically reviewed. Of the laboratory methods, the techniques using corrosion test specimens, the electrochemical methods (potentiokinetic polarization curves, potentiostatic measurements, impedance), and the corrosimetric metho…
This paper compares the anisotropy of surface magnetic Barkhausen noise (MBN) and pulse height distributions between two samples of oriented 3% Si-Fe steel laminate at equivalent flux densities. One sample had lower core loss (0.83 W/kg) than the other (0.97 W/kg). The MBN/sub Energy/ (square of the MBN voltage signal…
To produce magnetic field sensors for use on irregular surfaces, thin-film-type elements that can detect a magnetic field by the magneto-impedance (MI) effect were formed on 20-/spl mu/m-thick polyimide substrates by sputtering. The thin-film MI element has a layered configuration with the conductive Cu film surrounde…
A novel photoreversible photochromic system, 3-(2-benzylbenzoyl)-1,2-R,R(1)-4(1H)-quinolinones/12-hydroxy-5-R-5a-R(1)-6-phenyl-5a,6-dihydrobenzo[b]acridin-11(5H)-ones, is described.
The ability of a silicone antifoam to retard foaming in a liquor prepared from potatoes is enhanced by the addition of ethoxylated nonionic surfactants. The enhancement is non-linear for surfactant concentration, with all 12 surfactants tested possessing a concentration at which foam heights strongly diminish, referre…
sn-Glycerol-1-phosphate dehydrogenase is responsible for the formation of the sn-glycerol-1-phosphate backbone of archaeal lipids. [4-3H]NADH that had 3H at the R side was produced from [4-3H]NAD and glucose with glucose dehydrogenase (a pro-S type enzyme). The 3H of this [4-3H]NADH was transferred to dihydroxyacetone…
A paramagnetic cobalt carbonyl cluster, [Co10P2(CO)23H]2−, containing two partially-encapsulated phosphorus atoms is synthesized through the reaction of [Co6(CO)15]2− and [Co(CO)4]− with PBr3 in THF.
Calcined powders were prepared for sintering of cubic Cs0.9Al0.9Si2.1O6 by calcining a mixture of Al2O3/SiO2 fine powder and CsNO3 powder at temperatures of 798 to 1123K for 20h in air. The amorphous phase produced in the case of a lower calcination temperature, while the crystallinity of the calcined powder increased…
The effect of gamma radiation on the permittivity ɛ and the electrical conductivity σ of TlGaS 2 crystals is investigated at frequencies of 0.1, 1, and 10 kHz and 1 MHz in the temperature range 200–370 K. It is shown that an increase in the temperature leads to an increase in the permittivity ɛ and the electrical cond…
The chlorine concentration in trichloroisocyanuric acid (TCI) solutions depended on the solvent used to apply the chlorination agent on the rubber surface and on the time after preparation of the solutions. In this study, methyl ethyl ketone (MEK) and ethyl acetate (EA) have been used as solvents for 2 wt% TCI in the…
Novel structured functional hybrid materials can be obtained by incorporating photoresponsive organic components into the silicate walls of periodic mesoporous silicates. Two such materials are described, containing either viologens or stilbene analogs. Thermal or photochemical activation of viologen units generates t…
The refractive index modification of polysilane films by the Ultra-Violet (UV) light irradiation was investigated. Poly(methylphenylsilane) (PMPS) and other polysilanes involving phenyl group attached directly to a silicone atom showed high refractive index (ninit ∼ 1.70) and very large refractive index reduction (Δn…
Hydrogen storage alloys are attracting worldwide attention as hydrogen suppliers to fuel cells. However, several kinetic problems remain to be solved before practical use is possible. A methodology to accelerate reactions of hydrogenation and dehydrogenation and to lower the reaction temperature is strongly required.…
Abstract The second‐order nonlinear optical (NLO) properties of a series of benzothiazole derivatives were studied by use of the ZINDO‐SOS method. These chromophores are formed by a donor‐π‐bridge‐acceptor system, based on a nitro group connected with benzothiazole as the acceptor and a hydroxyl‐functional amino group…