Materials Literature
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The primary sequence of the receptor for L-arabinose or Ara-binding protein (ABP) composed of 306 residues is very different from the D-glucose/D-galactose-binding protein (GGBP) which consists of 309 residues. Nevertheless, superimpositioning of the well-refined high resolution structures of ABP in complex with D-gal…
Crystal/material quality and electrical properties of B-doped diamond films synthesized by microwave plasma chemical vapor deposition were investigated. Raman spectroscopy verified the presence of diamond and indicated that the crystal quality increased with B doping. Secondary-ion mass spectroscopy showed that the B/…
The distinguishing fe atures of different air texturing jets have been described and the te st methods use d to assess some impo rtant properties of air textured ya rn s have been discussed. The properties of air textured yarns produced using various currentl y used commercial jets have been compared. The re sults sho…
Abstract In this paper photocurrents of N ‐isopropylcarbazole (NIPC) derivatives in polycarbonate hosts are reported and compared to data for a benzotriazole derivative (BTA). The carbazole moiety was substituted with both electron donor and acceptor substituents and the photoconductivity was measured as a function of…
Outgassing rates were measured and compared for 304L, 316L, and 316LN stainless steels in fully degassed condition produced by repeated pumpdown and baking. In addition, thermal desorption characteristics and surface composition were measured. In particular, the effect of grade, vacuum remelting, and prebaking is disc…
The reaction of NH 4 TcO 4 with PPh 3 in DMF solution in the presence of HCl produces mer-Tc iii (PPh 3 ) 2 Cl 3 (DMF)•2PPh 3 (1). When the reaction is done in acidic DMA, the yellow product isolated was identified as NH 2 (CH 3 ) 2 + DMAH + [TcCl 6 ] 2− •PPh 3 O (2). The dimethylammonium cation was produced from the…
Lattice strains have been measured by neutron diffraction from the alumina matrix in alumina–mullite composite cylinders. Infiltration processing results in a macroscopic variation of mullite concentration and residual stress throughout the samples. At the midheight of the cylinder, the stress component parallel to th…
Model reactions of the hardening of gelatin with 13 C labeled formaldehyde were monitored by 13 C NMR spectroscopy in solution and in the solid state. In solution primary attack of formaldehyde first forms methylols of lysine residues and later of arginine residues, which react to a lysine-arginine crosslink. During t…
In June 1988 Gd DTPA became the first MR contrast agent to be approved for clinical use in adult patients in the United States. Initial approval was given for its use in imaging of the head. One year later approval was extended to include spine studies. This was soon followed by approval for use in children aged 2 yea…
The electro‐oxidation reactions of substituted polysilane homopolymers dissolved in methylene chloride electrolyte were studied using cyclic voltammetry and chronocoulometry. The oxidation waves appear at potentials close to those for the corresponding waves for polymer films, but the current peak height responds line…
Abstract The inelastic reflection of fast electrons is investigated on the base of the “invariant imbedding method”. The non‐linear term in the integral equation can be neglected owing to the strong anisotropy of elastic cross‐section of fast electrons. Using the Fokker‐Planck approximation and the Laplace transformat…
Quantitative determination of phase abundance in high‐alumina refractories has been performed using the Rietveld refinement method applied to X‐ray powder diffraction data. The use of a “whole‐pattern” method for analysis has allowed the simultaneous determination of accurate unitcell parameters and the phase abundanc…
Abstract Sixty percent of the supratidal deposits of a well in the giant Yacheng Gas Field show evidence of pedogenic alteration. Pedogenic features of these Mid-Tertiary sediments include porphyroskelic and lattisepic textures, argillans, embayed quartz grains, peds, horizonation, high carbonaceous content, pedotubul…
Total serum calcium concentration was raised in a 63-year-old lady with multiple myeloma and markedly elevated serum IgA kappa-paraprotein concentration. Symptoms of hypercalcaemia were absent, and serum ionized calcium was normal, suggesting calcium binding by the abnormal protein. This was demonstrated directly afte…
AbstractThe evolution of microstructure during a single pass of laboratory hot rolling (47% reduction) of a 5083 aluminium alloy has been investigated at different positions through the thickness of the plate. The thermomechanical histories of the subsurface and centre regions of the hot rolled slab were analysed usin…
A comprehensive review of cotton maturity test methods is presented, and the relationship of maturity to dyeability is reviewed. The potential use of maturity test data for controlling commercial dyeing operations is assessed.
We have studied a Hamiltonian that models the change in effective interactions leading to a change in phonon dispersion relations that occurs at a diffusionless first-order structural phase transition. This change produces lower frequency phonons and correspondingly a higher vibrational entropy in the high-temperature…
Some analytical expressions for the calculation of the magnetic induction and the vector potential in iron-free media due to conductors in annular arc shape with regular cross section are reported. The algorithms derived, together with analogous algorithms reported previously for the calculation of the magnetic fields…
Stable and metastable phase relationships in the system ZrO 2 –ErO 1.5 were investigated using homogeneous samples prepared by rapid quenching of melts and by arc melting. The rapidly quenched samples were annealed in air for 48 h at 1690°C or for 8 months at 1315°C. Two tetragonal phases ( t ‐ and t ′‐phases) were ob…
For single-sheet testers, the field is derived either from the magnetization current or by means of a tangential field coil. The current method, proposed for IEC standardization, is characterized by simple apparatus and good reproducibility but suffers from questionable accuracy due to the lack of correspondence betwe…