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。
This brief history and review of liquid crystalline polyesters (LCPs) is limited to all-aromatic LCPs except for a description of the discovery of the first thermotropic polymer to be injection molded or melt spun and characterized as being liquid crystalline: an Eastman PET/PHB (p-hydroxybenzoic acid) copolyester (fi…
Microcapsules were prepared using a poly (L-lactic acid) (L = PLA), mol. wt. 43,200, by an emulsification and solvent evaporation technique. Phenobarbitone (PB) was used as a reference drug, (core to polymer ratio, 1:1). Both the o/w and w/o emulsion system were investigated in order to study microcapsule properties a…
Oxidative electropolymerization of cobalt and nickel complexes of tetra-aminophthalocyanine in dimethyl sulphoxide rapidly leads to electrode modification, and the thin polymeric coatings obtained by this method are highly electronically conductive under a wide variety of conditions.
"Encyclopedia of materials science and engineering." International Materials Reviews, 34(1), p. 246
Article The Hot Pressing of Dry-formed Wood-based Composites. Part II. A Simulation Model for Heat and Moisture Transfer, and Typical Results was published on January 1, 1989 in the journal Holzforschung (volume 43, issue 3).
Abstract Porphycene ( 2 ), a planar structural isomer of porphyrin ( 1 ) recognized and synthesized only recently, exhibits short N … N distances allowing exceptionally strong N‐H … N hydrogen bonds to be formed. Although the N 4 ‐coordination hole of 2 is smaller than that of 1 , the new tetrapyrrolic macrocycle is c…
New decagonal alloys in the Al–Ni–Fe and Al–Ni–Co systems have been produced by liquid quenching. Their formations extend in the ranges of 9 to 16 at% Ni and 9 to 21 at% Fe or Co. The whole replacement of Fe or Co in Al75Ni10(Fe or Co)15 alloys by V, Cr, Mn or Ru gives a mixed structure consisting of decagonal, icosah…
Sedimentation and ultrafiltration are important processes for removing solids from suspensions. The Kynch theory describes the transient settling of noncolloidal particles forming an incompressible sediment by providing a solution to the convective conservation equation. This solution predicts the existence of several…
The structure and growth morphology of Al65Cu15Fe20−xCox and Al65Cu20Fe15−xCox alloys have been examined in rapidly solidified, conventionally solidified and fully annealed states. A conventionally solidified Al65Cu15Co20 alloy, which was prepared by the whole substitution of Fe by Co for a stable icosahedral Al65Cu20…
Optical pumping has been used to select Ar atoms in the metastable 3P2 or 3P0 state in a flowing afterglow reactor. The relative concentrations of the two metastable states were assigned from observation of the N2(C,v′) emission spectra. The isolated reactions of the Ar(3P2) and Ar(3P0) atoms with F2, NF3, Cl2, CCl4,…
The first example of transition metal co-ordination to ethereal like oxygens of a 9-metallocrown-3 ether is seen in FeIII[FeIII(salicylhydroximato)(MeOH)(acetate)]3 and leads to an unusual tetranuclear cluster which exhibits both inter- and intra-cluster antiferromagnetic interactions and an S= 5 ground state.
New experiments conducted in a turbulent flow reactor show kinetic characteristics of methanol oxidation that have not been observed previously. Data are presented for methanol oxidation at equivalence ratios in the range of 0.6−1.6 and initial temperatures or 1025-1090 K at atmospheric pressure. At intermediate exten…
The present study concerns the surface layered structure of the cast Ti. A commercial Ti was cast into a mold which was made of a phosphate-bonded Al2O3/SiO2 investment. Elemental analyses of the interfacial zone of the casting were made under an electron probe micro-analyzer. The interfacial zone was composed of four…
The bacterial phosphotransferase system (PTS) functions in a variety of regulatory capacities. One of the best characterized of these is the process by which the PTS regulates inducer uptake and catabolite repression. Early genetic and physiological evidence supported a mechanism whereby the phosphorylation state of a…
Poly[3-(3,6-dioxaheptyl)thiophene] has been synthesised by electropolymerisation; this highly conducting electroactive polymer exhibits specific interactions with lithium cations.
The nature of the possible liquid-crystalline phases that a molecular or colloidal system may exhibit depends sensitively on the shape of the constituent particles. Recent computer simulations on fluids of consisting of non-spherical hard-core molecules suggest that, in order to predict the relative stability of isotr…
1. Volume I-Mechanical Behavior and Properties of Composite Materials 2. Volume 2 -Micromechanical Materials Modeling 3. Volume 3-Processing and Fabrication Technology 4. Volume 4-Failure Analysis of Composite Materials 5. Volume 5-Design Studies 6. Volume 6-Test Methods
Issues related to the design of high-frequency transformers are discussed. An analysis of skin and proximity effects in the conductors and measurements of permeability and hysteresis loss in the magnetic material are combined in a computer-assisted study of the relationships between size, efficiency, and frequency. Ex…
The mechanism of electrical tree initiation in polyethylene subjected at AC, DC, and half-rectified AC voltages is studied by an optical technique which is at least two orders of magnitude more sensitive than partial discharge detection. For DC voltage up to 46 kV, no light emission or tree inception was detected in t…
The esperamicins represent a class of antitumor antibiotics characterized by an unusual chemical core structure and extremely potent cytotoxicity. The mechanism by which these drugs produce cytotoxicity was investigated and found to be related to the formation of single- and double-strand DNA breaks. Using five struct…