Materials Literature
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Abstract The effect of a cold remote N 2 plasma (CRNP) or N 2 + O 2 plasma (CRNOP) on poly(ether ether ketone) (PEEK) is studied. The amount of nitrogen or oxygen uptake and functionalities are determined by x‐ray photoelectron spectroscopy (XPS). After CRNP treatment, the N/C and O/C atomic ratios are 0.301 and 0.333…
Surface-mediated alignment of nematic liquid crystals with polarized laser light was reported recently [1]. In this communication we describe the alignment of a guest–host liquid crystal medium with polarized laser light. Liquid crystals in the illuminated region orient perpendicular to the direction of the laser pola…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-temperature pyrolytic transformations of tri-tert-butoxysiloxy derivatives of aluminum to aluminosilicate materialsKarl W. Terry, Peter K. Ganzel, and T. Don TilleyCite this: Chem. Mater. 1992, 4, 6, 1290–1295Publication Date (Print):November 1, 1992Publication History P…
Water vapor buffering of hygroscopic fabrics during wear has been studied using both theoretical modeling and wear trials. Both theoretical predictions and experimental observations demonstrate that highly hygroscopic wool fabrics absorb significantly more sweat than fabrics of very low hygroscopicity, such as polyest…
We report on the properties of ${\mathrm{La}}_{\mathit{x}}$${\mathrm{Sr}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{VO}}_{3}$ which has a phase diagram which is similar to Sr-doped ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$ in that it too shows a composition-induced insulator-to-metal transition with strontium dopin…
Polymer films, based on aniline‐, phenol‐, normal vinyl‐ and heterocyclic/vinyl‐type monomers, were synthesized on mild steel by various electropolymerizations (EPs), and their corrosion resistance and structure were investigated because a new coating system with corrosion resistance for mild steel has been obtained.…
Aqueous solution of phenol was irradiated with ultrasonic waves of sufficient intensity to induce cavitation. The phenol was exponentially degradated, because of the formation of reactive species produced by water decomposition and reaction with water and oxygen. The degradation pathway for phenol was similar to that…
The levels of volatile sulphur compounds (VSC) in periodontal pockets and mouth air have been found to correlate with severity of the disease process. The purpose of this study was to examine the influence of hydrogen sulphide and methyl mercaptan on protein metabolism of human gingival fibroblasts. The incorporation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-assembly of delocalized .pi.-stacks in solution. Assessment of structural effectsChuan Jian Zhong, Wing Sum V. Kwan, and Larry L. MillerCite this: Chem. Mater. 1992, 4, 6, 1423–1428Publication Date (Print):November 1, 1992Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and spectroelectrochemistry (EPR, UV-visible-near-IR) of platinum(II) 2,2'-bipyridine and ring-metalated bipyridine complexes: PtII(L-) and PtI(L-) but not PtI(L)Paul S. Braterman, Jae Inh Song, Franz M. Wimmer, Smita Wimmer, Wolfgang Kaim, Axel Klein, and R…
Abstract An increasing number of polymer alloys made by reactive processing of a compatibilizer precursor (CP) to form the compatibilizer in situ have appeared in recent years. Literature reports on compatibilization studies have focused on interactions of chemistry‐morphology, processing‐morphology, morphology‐rheolo…
The family of glutamate dehydrogenases include a group of hexameric oligomers with a subunit M(r) of around 50,000, which are closely related in amino acid sequence and a smaller group of tetrameric oligomers based on a much larger subunit with M(r) 115,000. Sequence comparisons have indicated a low level of similarit…
The behavior of corrosion inhibition of mild steel by various cationic and anionic polymers, that is, polyethyleneimine (PEI), its derivative (PEID), polyarylamine (PAAm) and polydicyanodiamide derivative (PDCDA) as cationic polymers and polymaleic acid derivative (PMAD), polyacrylic acid derivative (PAAD) and polyacr…
To evaluate whether or not the corneal micropocket implantation is effective for determining the toxicity of polymeric materials, currently used biodegradable polymers such as poly(lactic acid) (PLA), poly(glycolic acid) (PGA), LA-GA copolymers, and three kinds of poly(2-cyano-acrylate)s (PCA) were implanted in a rabb…
A cDNA clone has been prepared from mRNA of cultured human keratinocytes. The sequence of the cDNA reveals that in the C-terminal two-thirds of the corresponding protein (basonuclin), there are three separated pairs of adjacent zinc fingers. The amino acid sequence of each pair is homologous to that of the single pair…
An alternative procedure is developed to the smoothed linear fitting method of McDonald and Owen. The procedure is based on the detection of discontinuities by comparing, at any given position, three smooth fits. Diagnostics are used to detect discontinuities in the regression function itself (edge detection) or in it…
Polycrystalline films of ZnS with a slight excess of S have been grown on (100) Si by congruent sublimation from a single Knudsen cell. Intense blue emission is observed at 460 nm from room-temperature photoluminescence studies, and is ascribed to S-Zn vacancies acting as self-activated (SA) centres. The emission is q…
Cyclopropane fatty acid (CFA) synthase of Escherichia coli catalyzes a modification of the acyl chains of phospholipid bilayers. We report (i) identification of the CFA synthase protein, (ii) overproduction (> 600-fold) and purification to essential homogeneity of the enzyme, and (iii) the amino acid sequence of CFA s…
Coordination of Ru(NH_3)_5 groups to the four pyridine sites in cobalt meso-tetrakis(4-pyridyl)porphyrin adsorbed \non pyrolytic graphite electrodes produces the tetraruthenated complex which acts as a catalyst for the four-electron reduction of O_2 to H_2O. The adsorbed catalyst, prepared by this heterogeneous co…
The adhesion and interfacial bonding between nonreactive liquid metals and solid inocovalent oxides are studied on the basis of the experimental work of adhesion W data. An analysis of the experimental W values of different liquid metals on various solid oxides is first performed to put into evidence the dependences o…