Materials Literature
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Thin zirconia films prepared by self-assembled monolayer-mediated deposition from an aqueous medium were investigated by transmission electron microscopy and electron-energy-loss spectroscopy. As-grown films were amorphous, and annealing at temperatures below 525°C did not influence the film structure. Annealing at 55…
Tri(1-chloro-3-etoxy-propane-2-ol) borate (I) was obtained by reaction of tri(hydroxyethyl) borate and epichlorohydrin. Reaction product was applied as fire retardant for preparation of rigid polyurethane-polyisocyanuratefoams. As the (I) content was increased from 0.1 to 0.4 of the chemical equivalent, the compressiv…
ABSTRACT: Internal atmosphere modification in fruits and vegetables by surface film coatings depends on film permeability, coating thickness, and fruit surface coverage. Research in this area has been mostly empirical, with unpredictable results and diverse conclusions. To reduce variability, it is necessary to have a…
Diagnostic measurements performed for surge arresters are normally studied by evaluating their suitability to detect aging and degradation of metal oxide material. The suitability of different methods for revealing internal moisture in arresters has not been studied much. This aspect is considered in the paper based o…
Abstract In this study, we have prepared predominantly syndiotactic poly([ R,S ]‐β‐hydroxybutyrate) using different distannoxane catalyst systems (1‐hydroxy‐3‐chlorotetrabutyldistannoxane, 1‐ethoxy‐3‐chlorotetrabutyldistannoxane, 1,3‐dichlorotetrabutyldistannoxane, and dibutyltin oxide). Copolymers poly([ R,S ]‐β‐hydr…
Abstract A combined sorption/catalytic process has been discovered that converts the methanol and mercaptans in Kraft pulp mill waste gas condensates into formaldehyde. A pilot plant was operated at Georgia‐Pacific's Brunswick, GA, mill for two years to optimize both sorbents and catalyst. Patents were issued. Applica…
Clay mineral composition and geotechnical index properties of marine clays collected from Singapore, Korea, and Japan were investigated, and the correlation of clay mineral composition with the consistency limits and activity of the clays was examined. Predominant clay minerals were kaolinite for Singapore clay, kaoli…
Long cattle tendons were enzymatically disposed of lipoid and accompanying nitrogenous substances. Collagenous hydrolysate of average molecular mass M(a) = 0.830 +/- 1.206 kDa, suitable for application in skin and hair-care preparations, was obtained through hydrolysis by commercial protease (Bacillus subtilis) under…
We present combined results of optical, scattering, and spectroscopic studies of (K 2 O) 15 (Nb 2 O 5 ) 15 (TeO 2 ) 70 glass and glass ceramic and comment on possible mechanisms of the optical behavior in terms of existing theory. The glass ceramic is confirmed to generate second-harmonic light. Combined neutron and X…
Abstract π-Radical thiol-derivatized gold nano-particles with the average diameter of 4.1 nm were isolated, and about one hundred π-radical ligands were found to be chemisorbed on the nano-particle. The solid sample of the nano-particles showed an extremely broadened ESR signal with the peak-to-peak derivative line wi…
Abstract The influence of the two contact modes, percolation and immersion, during the extraction of oilseeds by means of a solvent are presented. Experiments were performed in lab‐scale equipment with soybean flakes, arranged in beds that reproduce these two contact modes. The extractions were carried out with hexane…
Highly fluorinated poly(ether sulfone)s were prepared by a modified polycondensation technique, using a molecular sieve dehydrating apparatus in order to efficiently remove water under mild conditions. Consequently, side reactions were minimized, which resulted in the formation of polymers free of microgels. This reac…
The synthesis of dihydroxybenzenes (DHB) via the gas-phase oxidation of phenol with nitrous oxide in the presence of benzene was studied. Addition of benzene to the feed mixture greatly improves the selectivity and catalytic stability of the Fe-containing ZSM-5 zeolite, that was previously considered to be a main obst…
Abstract In the rubber industry, especially tyre production, the most widely used elastomer is styrene–butadiene rubber (SBR) in which the styrene units generally are present at 25 wt.%. The unit repeats are random distributed along the macromolecular chains and the configuration of the butadiene units is mostly 1,4‐…
The transient, one-dimensional, thermally thick, noncharring solid material version of a numerical thermal degradation model is used to analyze the thermal degradation process of poly(methyl methacrylate) when subjected to a radiation source from a graphite plate. A theory is developed to account for oxygen-sensitive…
Abstract This paper reports in situ atomic force microscopy (AFM) and SEM studies of the corrosion of duplex stainless steels. The results showed selective dissolution of the duplex structure, with one rapidly dissolving phase and one slowly dissolving phase. Electron probe microanalysis (EPMA) measurements showed tha…
The structure of tuperssuatsiaite from the Aris phonolite in central Namibia was refined to an R index of 0.075 for 905 observed reflections [I > 2σ(I)] obtained with a four-circle X-ray diffractometer. Tuperssuatsiaite is monoclinic, C2/m, with a = 14.034(7), b = 17.841(7), c = 5.265(2) Å, and β = 103.67(4)°. Micr…
Abstract Based on the metabolic pathways for polyhydroxyalkanoate (PHA) biosynthesis, we succeeded in establishing the recombinant Pseudomonas sp 61‐3 strains that synthesize random copolyesters consisting of ( R )‐3‐hydroxybutyrate (3HB) and ( R )‐medium‐chain‐length 3‐hydroxyalkanoate (mcl‐3HA) units, P(3HB‐ co ‐3HA…
Plasma-enhanced chemical vapor deposition is used to grow vertically aligned multiwalled carbon nanofibers (MWNFs). The graphite basal planes in these nanofibers are not parallel as in nanotubes; instead they exhibit a small angle resembling a stacked cone arrangement. A parametric study with varying process parameter…
Abstract This review describes the chemistry of the formation and functionalization of molecularly templated mesoporous silica, as well as applications of functionalized mesoporous silica. The functionalization can be selectively placed on the internal or external surfaces, or even within the pore walls of mesoporous…