Materials Literature
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A previously unknown collagen cDNA clone, PF19, was isolated from a human placenta library. The 2.1-kilobase insert has a complete open reading frame of 709 amino acids that includes 12 amino acids of the NH2-terminal domain, a principally collagenous region of 577 residues, and 120 residues of the noncollagenous COOH…
We have measured the dielectric response, \ensuremath{\varepsilon}\ifmmode \tilde{}\else \~{}\fi{}(\ensuremath{\omega}), in o-terphenyl due to the secondary relaxations that occur below the glass-transition temperature. We have found that the imaginary part of \ensuremath{\varepsilon}\ifmmode \tilde{}\else \~{}\fi{}(\…
Pyrococcus furiosus is a marine hyperthermophile that grows optimally at 100 degrees C. Glutamate dehydrogenase (GDH) from P. furiosus is a hexamer of identical subunits and has an M(r) = 270,000 +/- 5500 at 25 degrees C. Electron micrographs showed that the subunit arrangement is similar to that of GDH from bovine li…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAggregation behavior of Pluronic P-94 in waterP. Bahadur and K. PandyaCite this: Langmuir 1992, 8, 11, 2666–2670Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inissue 1 November 1992https://pubs.acs.org/doi/10.1021/la00047a01…
Optical-conductivity spectra have been measured on the correlated electron system ${\mathrm{Sr}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{La}}_{\mathit{x}}$${\mathrm{TiO}}_{3}$ (0\ensuremath{\le}x\ensuremath{\le}1) in order to determine how the electronic structure depends on the filling of the 3d-electron condu…
Quantitative X-ray diffraction measurements made over a temperature range 16–300K on a Pd sample of 8·3nm median grain size were compared with data acquired from a coarse-grained Pd reference sample. The larger Debye-Waller parameter of nanocrystalline Pd was found to be due to increased static displacements of atoms…
A novel method of function minimization that combines the power of the diagonal approximation to the normal matrix with conjugate directions is described. This method approaches closer to the local minimum than the methods that are commonly used in macromolecular refinement. The weakness of the current methods are ana…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCritical behavior and crossover scaling in symmetric polymer mixtures: a Monte Carlo investigationH. P. Deutsch and K. BinderCite this: Macromolecules 1992, 25, 23, 6214–6230Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Published inis…
Abstract Depending on the stoichiometry the alkali metal‐transition metal‐chalogenides crystallize analogous to the silicates in structures with isolated groups, chains or layers. The formation of the framework structures is realized by linkage of anionic transition metal‐chalcogenide complexes. – The magnetic propert…
A study was conducted at a mineral sands separation plant to evaluate the workplace performance of half-mask filter cartridge respirators. Inhalation exposure was estimated by measuring the dust and radioactivity concentration inside the respirator while it was worn or hanging around the worker's neck. The program pro…
Abstract Figures‐of‐merit (FOMs) is a term which is used to define the quantitative measure of performance based on parameters which can be determined by the experimentalist. The FOM may be intuitive , based on previous experience of the analyst or his personal assessment of the importance of certain parameters, or de…
Abstract Raman spectra of biaxial crystalline and amorphous poly( p ‐phenylene sulfide) (PPS) films were recorded using the micro‐Raman technique. The Raman spectra of its corresponding trimer and tetramer from KBr pellets and the infrared spectrum from the PPS film were also recorded in order to elucidate the normal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanisms of cage reactions: kinetics of combination and diffusion after picosecond photolysis of iron(II) porphyrin ligated systemsTeddy G. Traylor, Douglas Magde, Jikun Luo, Kevin N. Walda, Debkumar Bandyopadhyay, Guo Zhang Wu, and Vijay S. SharmaCite this: J. Am. Chem. S…
Abstract The Part I of this series described a rapid method for determining the quality of carbon-black dispersion. The second paper (Part II) was concerned with the kinetics of the dispersion of carbon black into natural rubber (dispersion quality as a function of mixing time) in an internal mixer. In this paper we c…
In Lactobacillus plantarum non-allosteric L-lactate dehydrogenase (L-LDH), the highly conserved His188 residue, which is involved in the binding of an allosteric effector, fructose 1,6-bisphosphate [Fru(1,6)P2], in allosteric L-LDH is uniquely substituted by an Asp. The mutant L. plantarum L-LDH, in which Asp188 is re…
The influence of heat transfer on the propagation of acoustic disturbances in a gas–liquid foam of polyhedral structure is considered in this paper. The presence of quasiordered structure of microcapillaries (Plateau–Gibbs channels) results in the appearance of a hydrodynamic effect caused by liquid motion along the c…
Abstract Die Verbindung NaBa 2 Cu 3 O 6 wurde durch Reaktion von Na 2 O 2 , BaO 2 , Cu 2 O in geschlossenen Silberrohren erstmals dargestellt. An Einkristallen wurde die Kristallstruktur röntgenographisch aufgeklärt. NaBa 2 Cu 3 O 6 Kristallisiert orthorhombisch, Raumgruppe D ‐Fmmm mit a = 8,4229; b = 11,4418; c = 14,…
Boron carbide is used as a highly effective antioxidant in carbon‐containing refractories. The oxidation‐inhibiting action of this additive has not been clearly defined. The work first deals in theory with the stability of boron carbide at high temperatures. The practical section presents the reaction sequence as dete…
The spreading of smectic-A droplets on a smooth, high-energy surface has been studied using x-ray reflectivity, ellipsometry, and video imaging at the Brewster angle. These droplets have a layered structure and terraces are evidenced. The dynamics of expansion or retraction of these terraces are investigated and compa…
The motile diatom, Bacillaria paxillifer (O. F. Müll.) Hendy, shows a remarkable form of gliding motility in which entire colonies rhythmically expand and contract as single units. Cultures of Bacillaria grown under an alternating light/dark regime were found to exhibit rhythms in cell motility with the majority of co…