Materials Literature
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We have re-analyzed the dynamics of the ring spinning process as a coupled set of subproblems and have obtained the solutions numerically. The analyses in Parts I and II of this series deal with the case of an uncontrolled balloon. In Part I we ignore the effects of air drag as well as gravitational and Coriolis accel…
Abstract The suitability of different pulps (e.g. chemithermomechanical, kraft, tempure, temalfa, cotton, and sawdust) as well as various wood species (e.g. softwood, spruce; hardwood, aspen and birch) as the reinforcing filler for thermoplastic composites of PVC (two different grades) have been evaluated on the basis…
Phase matched second harmonic generation was observed in a ferroelectric liquid crystal mixture. An electric field was applied parallel to glass plates of a homeotropically aligned cell in order to introduce a uniform alignment of the directors and the permanent dipoles. The phase matching was performed with an extrao…
Convolution products Were obtained by folding a specimen-related function into another function representing the intrinsic profile of the diffractometer used in this study. The instrumental contributions were modeled with three split-Pearson VII functions: one for each of the α1, α2 and α3 components in the Cu Kα spec…
Substitution of a lysyl residue for Arg-386 of Escherichia coli aspartate aminotransferase resulted in an extensive decrease in Vmax values (0.8% with the aspartate-2-oxoglutarate pair and 0.2% with the glutamate-oxalacetate pair, compared with the corresponding values for the wild-type enzyme). Kinetic analysis of th…
Phase‐transformation‐induced compressive surface stresses were introduced into ceria‐doped tetragonal zirconia polycrystals by reduction of CeO 2 . Four‐point‐bending strength of sintered ZrO 2 containing 12 mol% CeO 2 increased from 240 to 545 MPa after it was annealed at 1400°C for 2 h in nitrogen. The strength of t…
Lead titanate ceramics modified with 24, 30, 35 and 40 mole% of calcium have been obtained. The thermal behaviour of permittivity as well as that of pyroelectric coefficient present a larger broadening the larger the Ca content, which could be adscribed to an increasing disorder on the Ca and Pb arrangement. On the ot…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of a model saturated hydrocarbon diblock copolymerFrank S. Bates, Jeffrey H. Rosedale, Harvey E. Bair, and Thomas P. RussellCite this: Macromolecules 1989, 22, 6, 2557–2564Publication Date (Print):June 1, 1989Publication History Published onlin…
Diamond films doped with boron were fabricated by the thermal filament CVD method. Powdered B 2 O 3 was used as the doping source. The films were identified as diamond by means of several methods including Raman spectroscopy. The resistivity of the films was inversely proportional to the B / C ratio over four orders.…
To investigate a possible chromosomal clustering of glycolytic enzyme genes, the complete nucleotide sequence of the 8029 bp insert of Escherichia coli DNA in the ColE1 plasmid pLC33-5 of the Clarke and Carbon collection (Clark and Carbon, 1976) was determined. Genes (pgk, fda) encoding the phosphoglycerate kinase and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical and physical properties of electrochemically prepared polyaniline p-toluenesulfonatesKyung Moon Choi, Keu Hong Kim, and Jae Shi ChoiCite this: J. Phys. Chem. 1989, 93, 11, 4659–4664Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Pu…
The effect of texture on the interpretation of the classical radial distribution function (RDF) is studied. A model of axial texture is presented which enables the calculation of the effect for individual interatomic distances and an analysis of the effect on the global RDF. The example shows that the shift of the RDF…
Abstract Ore microscope and electron microprobe investigations on Zn-Pb-Ag ores from B Zone in Silvermines, Ireland, have shown the presence of two As-Sb-Ag phases; a tetrahedrite-group mineral with composition Cu 6.3 Ag 3.7 Fe 0.9 Zn 1.2 As 2.2 Sb 2.1 S 12.7 and proustite-pyrargyrite (Ag 3 As 0.5 Sb 0.5 S 3 ). It is…
The adhesion of electrolessly deposited Ni onto lead zirconate titanate (PZT) ceramic has been measured as a function of both the ceramics surface preparation prior to metalization and the plated Ni thickness. A maximum in NI/PZT interfacial adhesion of approximately 27 kg/cm 2 , as measured by a pull test, occurs whe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of trans axial ligands on five-coordinate .sigma.-bonded metalloporphyrins. Structural, electrochemical, and spectral investigations of (OEP)Ir(C3H7)(L) complexesKarl M. Kadish, J. L. Cornillon, P. Mitaine, Y. J. Deng, and J. D. KorpCite this: Inorg. Chem. 1989, 28…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoreactivity of .sigma.-bonded metalloporphyrins. 1. Formation of zwitterionic indium and gallium porphyrin complexes in tetrahydrofuranK. M. Kadish, G. B. Maiya, and Q. Y. XuCite this: Inorg. Chem. 1989, 28, 13, 2518–2523Publication Date (Print):June 1, 1989Publication H…
Sequence-specific photomodification of oligodeoxynucleotide pAGAGTATTGACTTA ("a target") has been carried out with the aid of complementary fluorescent probes. Such a probe consisted of oligodeoxynucleotide pAATACTCT and a chromophore group attached to its 5' end. Three different derivatives of ethidium bromide were u…
A family of phosphate glasses has been developed with thermal expansion behavior in the elastic range that nearly matches the response of 304 stainless steel. Attempts to make concentric pin‐shell seals consistently have yielded fractures between 400° and 300°C during cooling. Elastic stress analyses which neglect gla…
Abstract The molecular weight dependence of the glass transition temperatures of polystyrene, polyα‐methyl styrene, polyisopropylα‐methyl styrene, polymethylmethacrylate, polyvinylchloride, poly‐isobutylene, polyisoprene, and poly‐ N ‐octadecylmaleimide is described by an equation developed from the Principle of Corre…
Abstract EXAFS (Extended X-ray Absorption Fine Structure) experiments on various polynuclear molybdate and tungstate compounds revealed the unusual phenomenon that Mo–O peaks which should appear at around 1.9 Å in Fourier transforms of the EXAFS spectra for Mo6O192− and PMo12O403− are hardly discernible, while the tun…