Materials Literature
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E-64-c, a synthetic cysteine protease inhibitor designed from E-64, binds to papain through a thioethe?covalent bond.The x-ray diffraction data for 2.1-A resolution were used to determine the three-dimensional structure of this complex and refined it to R = 0.159.In the complex structure, the configurational conversio…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation F. Cocchini, M. R. Nobile, D. Acierno; Transient and steady rheological behavior of the thermotro…
Mammalian tissues contain protein carboxyl methyltransferases that catalyze the transfer of methyl groups from S-adenosylmethionine to the free carboxyl groups of D-aspartyl or L-isoaspartyl residues (EC 2.1.1.77). These enzymes have been postulated to play a role in the repair and/or degradation of spontaneously dama…
We describe the results of Monte Carlo simulations of ${\mathrm{SiO}}_{2}$ glass based on a covalent-potential model of tetrahedral Si-O bonding. The potential model has been shown to accurately reproduce the structure, compression mechanisms, and phase stability of the corresponding crystalline and liquid phases. The…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT1,2,3,4,5-Tetrathiametallolanes of Group 14 metals, RR'MS4 (M = silicon, germanium, and tin): synthesis and crystal structuresNorihiro Tokitoh, Hiroyuki Suzuki, Tsuyoshi Matsumoto, Yasusuke Matsuhashi, Renji Okazaki, and Midori GotoCite this: J. Am. Chem. Soc. 1991, 113, 18,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudy of shear thinning in high polymer solution using dynamic NMR microscopyY. Xia and P. T. CallaghanCite this: Macromolecules 1991, 24, 17, 4777–4786Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https:/…
A high net gain of 30.1 dB at 1.309 mu m and an output saturation of 13 dBm are obtained using a Pr/sup 3+/-doped fluoride fiber amplifier pumped at 1.017 mu m. The critical Pr/sup 3+/ concentration at which concentration quenching begins to occur was obtained by fluorescence lifetime measurement. The Pr/sup 3+/ conce…
A series of aromatic polyimides and partially fluorinated aromatic polyimides were prepared and investigated to determine the structural features affecting their moisture absorption, dielectric constant, and dielectric constant as a function of relative humidity. The moisture absorption of polyimides is related to the…
In phase II and III trials of gadoteridol (Gd-HP-D03A), a new nonionic, low-osmolar contrast agent, 40 patients with intracranial neoplasms underwent magnetic resonance (MR) imaging with experimental doses of 0.05-0.3 mmol/kg. Fifteen patients also underwent contrast studies with the standard dose (0.1 mmol/kg) of gad…
Extensive intact assemblies of matrix macromolecules have been solubilized from foetal calf skin, nuchal ligament and aorta by a new procedure that includes bacterial collagenase digestion under non-reducing, non-denaturing conditions and gel filtration chromatography. Type VI collagen was identified as the major micr…
This paper reports neutron-diffraction results on a single icosahedral quasicrystal of Al-Cu-Fe. The basic properties of the structure have been extracted using six-dimensional (6D) Patterson analysis from 219 independent orbits of reflections. Described in 6D space, the structure has hyperspace group F\ensuremath{\bi…
The behavior of miscibility gaps in liquid-solid phase diagrams has been studied schematically for III-V semiconductor quaternary solutions of the type A x B 1- x C y D 1- y such as GaInPAs and AlInPAs. The topological features of the liquidus surface affected by solid immiscibility have been the focus of our examinat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPyridyl dicyanoquinodimethane acceptors for electroactive solidsH. E. Katz and M. L. SchillingCite this: J. Org. Chem. 1991, 56, 18, 5318–5324Publication Date (Print):August 1, 1991Publication History Published online1 May 2002Published inissue 1 August 1991https://pubs.acs.…
Abstract In order to understand the mutual orientation effect in photosynthetic electron transfer, two different kinds of quinone-linked porphyrins 1 and 2 with fixed orientation were synthesized. In the two compounds only orientation is different among various factors which control electron transfer. It has been foun…
In support of a structural design of the core graphite components of HTTR, comprehensive property measurements have been conducted using various test specimens taken systematically out of a full-sized log of IG-110 graphite. The measured data of seven properties have been utilized to assess the within-log variation an…
Summary An extracellular polysaccharide produced by Alcaligenes bacteria has been crosslinked to form firm gels that are stable for long periods at elevated temperatures. The biopolymer can be gelled with multivalent ions such as Cr+3; it can also be gelled at the 2, 000-to-4, 000-ppm level without Cr+3 in high-salini…
Abstract The reaction of 2,3‐dihalogeno‐1,4‐naphthoquinone with dithiooxamide gave dibenzo[ b,i ]thianthrene‐5,7,12,14‐tetrone in high yield but not 2,2′‐bis(naphtho[2,3‐ d ]thiazole‐4,9‐dione) which was previously reported. A similar reaction of 3,4‐dichloro‐ N ‐phenylmaleimide with dithiooxamide also gave the corres…
Sorption-desorption reactions of orthophosphate (OP) and pyrophosphate (PP) were studied in two size fractions of Quebec soils (St. Bernard and Dalhousie) and minerals (goethite and kaolinite). Soil and mineral samples were fractionated into two separates (20.0–2.0 μm and 2.0–0.2 μm). The soils had similar mineral sui…
The joint distribution pN(ω,R1,R2) of the lengths of the vectors (R1,R2) and the angle ω between the vectors joining the center of mass of a block or bead in a chain with the centers of mass of the preceding and succeeding beads of a coarse-grained chain is investigated. Somewhat unexpectedly, the a priori and the con…
Abstract A lightweight conducting polymer composite was prepared by the incorporation of conducting polypyrrole in the pores of a host polymer to form a conductive network. The inclusion of polypyrrole in a porous cross‐linked polystyrene host polymer, prepared by the concentrated emulsion polymerization method, was c…