Materials Literature
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Vimentin is a growth-regulated gene whose mRNA levels increase severalfold after stimulation of quiescent cells. We have isolated and sequenced a genomic fragment of human DNA containing the vimentin 5'-flanking sequence and untranslated region. S1 nuclease analysis was used to determine the transcription initiation s…
The details of photoluminescence and excitation spectra of powder phosphors were obtained at various temperatures between 6 and 300 K. At 300 K, two emission bands originating from the , transitions are observed at 480 and 535 nm for and at 470 and 527 nm for , respectively. In the excitation spectra, bands correspond…
Abstract It has been reported that the addition of specific copolymers can improve the mechanical properties of blends of polyethylene with polyamide‐6. One of these, a poly(ethylene‐co‐methacrylic acid) (EMA) containing between 4 and 15 mol % of methacrylic acid units, has often been used. Binary polyethylene/EMA and…
Electrodeposited tungsten oxide films from aqueous tungstic acid-hydrogen peroxide solutions were investigated for applications to electrochromic devices. These films exhibited electrochromism in aprotic electrolyte solutions containing Li-salts. When the films were heat-treated for an hour at temperatures between 100…
A cDNA clone, named ppcMDH-1 and covering a part of the coding region for the porcine cytosolic malate dehydrogenase (cMDH) mRNA, was isolated from a porcine liver cDNA library. Subsequently, mouse cMDH cDNA clones were isolated from mouse liver and heart cDNA libraries, using the ppcMDH-1 cDNA as a probe. The longest…
Recent developments in understanding structural and material properties of ferroelectric liquid crystals are reviewed with emphasis on their relevance for electro-optic effects and device applications. In only a few years the material situation has changed from one characterized by an almost complete lack of technical…
The amino acid sequence of the 212-residues-long N-terminal aggregation and cross-linking region of the alpha 2(IV) chain of human basement membrane collagen is presented. Comparing this with the primary structure of alpha 1(IV)7S [Glanville et al. (1985) Eur. J. Biochem. 152, 213-219] revealed a high degree of simila…
Low-frequency noise spectra originating from resistance fluctuations in Al films during electromigration were measured in the absolute temperature and current density intervals327 \leq T \leq 396K and1.34 \times 10^{6} \leq j \leq 2.22 \times 10^{6}A/cm2. The values of SR, the resistance power spectral density, at 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of nickel(III) in a classical N2S2 coordination environment containing anionic sulfurH. J. Krueger and R. H. HolmCite this: Inorg. Chem. 1987, 26, 22, 3645–3647Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVariational basis-set calculations of accurate quantum mechanical reaction probabilitiesDavid W. Schwenke, Kenneth. Haug, Donald G. Truhlar, Yan. Sun, John Z. H. Zhang, and Donald J. KouriCite this: J. Phys. Chem. 1987, 91, 24, 6080–6082Publication Date (Print):November 1, 1…
Drosophila laminin was isolated from the medium of Drosophila Kc cell cultures. It was purified by velocity sedimentation, gel filtration, and chromatography. Drosophila laminin is a disulfide-linked molecule consisting of three chains with apparent molecular masses of 400, 215, and 185 kD. In electron micrographs, it…
The electroclinic effect in the smectic A phase of 4-(3-methyl-2-chlorobutanoyloxy)-4'-heptyloxybiphenyl has been investigated. Values up to 10° are obtained for the induced tilt angle, which is proportional to the applied d.c. field. The amplitude of the tilt angle modulation shows exactly the same dependence on temp…
Diffuse scattering from TiNi alloys of near equi-atomic composition is investigated by electron diffraction, and several high-resolution images produced by diffuse scattering together with some Bragg reflections are presented. Three characteristic features of diffuse scattering are as follows. (1) The maxima of the di…
Abstract The He(I α ) photoelectron (PE) spectra of the three isomeric seleno analogues 7, 8 and 11 of thieno [3,4‐ b ]thiophene have been recorded. The first four bands can be assigned to ionizations from π‐MO′s by comparing their energies with the calculated orbital energies derived from HMO and PPP calculations. Th…
The use of eeric ions for initiating graft copolymerization of vinyl monomers on cellulosic materials has been reported by several workers [1-10]. Initiation of graft copolymerization is often thought to be by radicals generated on the cellulose by the abstraction of a hydrogen atom from a carbon atom carrying hydroxy…
The polychromatic Laue method was developed for application in flash X-ray diffraction studies; it can also serve as a valuable tool for fast data acquisition with conventional X-ray and synchrotron sources. The present method was developed with a sealed X-ray tube (Mo anode, 45 kV, 20 mA) and a crystal of known struc…
Abstract 1) The J -integral is path independent in both PS and SEN specimens and equals the tearing energy. 2) The critical J -integral at initiation is less in PS specimens than in SEN specimens, because the greater biaxial stress in PS restricts the process zone. 3) At initiation, the crack-tip radius, proportional…
Surface-plasmon excitation on a corrugated Ag surface in conical (nonplanar) geometry is studied. Both p and s polarizations of the incident wave are considered. The Rayleigh method is applied to obtain the infinite set of simultaneous linear equations with respect to the reflected and transmitted amplitudes of the sp…
Summary This paper supports the use of formaldehyde at economically feasible concentrations as a biocide for EOR processes that use xanthan biopolymer. Its biocidal action against anaerobic sessile xanthan-degrading field organisms was clearly superior to three other biocides tested when 100% kill was used as the crit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTModel reduction for two-dimensional catalyst pellets with complex kineticsAnthony G. Dixon and David L. CresswellCite this: Ind. Eng. Chem. Res. 1987, 26, 11, 2306–2312Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inissue 1…