Materials Literature
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Abrasion and heat damage to desized and scoured cotton fabric during drying in a household tumble dryer are evaluated by SEM (scanning electron microscopy) and weight and tensile/strain tests for breaking strength and elongation. Wet fabric dried with heat shows severe fiber damage, and wet fabric tumbled at room temp…
Butt welds of duplex stainless steel plate (grade 2205) have been produced using grade 2209 consumables for a variety of welding processes employed in the shipbuilding industry. The welding processes were used initially with interpass temperatures in the range 250–350°C. When the interpass temperature was controlled t…
Alloy Cu-10% Ni (ASTM B-111, UNS C70600) has been used extensively for condenser and heat exchanger tubes in power stations. However, there have been cases of severe localized corrosion in this alloy. This paper presents the evaluation of Cu-10% Ni in a dynamic online monitoring system with one-way circulation using a…
Abstract Chlorite and illite are commonly associated with ubiquitous secondary K-rich feldspar in the rocks located immediately above and below the Precambrian-Paleozoic unconformity in southwestern Ontario, and elsewhere in the mid-continent of North America. This alteration assemblage is attributed to long-distance…
Electron diffraction analysis, nuclear magnetic resonance measurements, structure determinations and refinements were performed on two ferroelectric lead-containing ceramics (classical and relaxor), with tetragonal tungsten bronze structure, in order to investigate the origin of the relaxor behaviour in such compounds…
Abstract A physical model of semicrystalline polymer solidification is proposed, along with an outline of general theoretical aspects of morphological modeling. Computational modeling, based on the proposed envelop evolution equation associated with a primary nucleation model and the elastic energy equation of the lam…
A cytotoxic steroidal glycoside was isolated from Chlorophytum malayense Ridley and its structure was characterized as a known compound, neohecogenin 3-O-beta-D-glucopyranosyl(1-->2)-[beta-D-xylopyranosyl(1-->3)]-beta-D- glucopyranosyl(1-->4)-beta-D-galactopyranoside (chloromaloside A). The structural identification w…
Based on weak- and strong-segregation theories, symmetric AB diblock copolymers and the homologous A2B2 starblock copolymers formed by joining pairs of diblocks together by their junctions should have identical order–disorder transitions (ODT’s) and lamellar periods. However, recent experiments report that the starblo…
Abstract Thin dense yttria‐stabilized‐zirconia (YSZ)/Pd composite (dual‐phase) membranes were fabricated on porous YSZ membranes by a new approach that combines the reservoir method and chemical vapor deposition (CVD) technique. A thin porous YSZ layer was coated on a porous alumina support by dip coating the YSZ susp…
ABSTRACT Electroflotation is a promising technology for simultaneous disinfection and removal of floatable constituents of food process water or fluid products. A bench‐scale electroflotation apparatus was constructed. The device demonstrated that disinfection was affected by the presence of chloride and the applied c…
Phthalocyanine (Pc) derivatives in which substituents hold the Pc units in isolation from one another in the solid state are potentially useful materials. Three synthetic approaches to achieve this goal are described: the construction of a dendrimer about a Pc core; the incorporation of alkyl side chains which are for…
Abstract Stress‐whitening occurs in many crystalline polymers when they are subjected to cold‐drawing at atmospheric pressure and at room temperature. The exact structure and morphology of stress‐whitening are still in contention, although it is widely believed that stress‐whitening is a combination of crazes and void…
We have studied the concentration quenching of Yb/sup 3+/ ion fluorescence in Yb-doped silicate glasses containing up to 3.4/spl times/10/sup 21/ cm/sup -3/ Yb/sup 3+/ ions. The absorption and fluorescence spectra are similar to those obtained for the Yb/sup 3+/ ion in many different matrices, with a radiative lifetim…
The eastern coast of Saudi Arabia has one of the most corrosive environments in the world. Dhahran is therefore an ideal location for the study of atmospheric corrosion. One out of every seven cars in the region is corroded. The atmosphere is contaminated by SO 2 and a high concentration of suspended particulate matte…
The Raman scattering of $\ensuremath{\mu}\mathrm{c}\ensuremath{-}{\mathrm{WO}}_{3}$ was investigated for pressures ranging from atmospheric to 4 GPa. The material, originally a mixture of two crystalline structures with groups ${P2}_{1}/n$ (monoclinic). and $P1\ifmmode\bar\else\textasciimacron\fi{}$ (triclinic), trans…
The petalite-subtype Tanco granitic pegmatite, southeastern Manitoba, intrudes an amphibolite (metagabbro), which is metasomatically altered to tourmaline and magnesian annite close to the contact. The composition of exocontact tourmaline depends on the composition of the host rock and on the composition and amount of…
The results of a metallographic study of gray cast-iron water pipes are reported. These pipes were installed between 1885 and 1973 in eight different water systems. Each pipe had been extracted during scheduled maintenance or failure repairs to provide data for a larger study to produce a methodology for determining t…
The paper reports on a study of the effect of annealing in hydrogen on the structural phase transition in clusters of ultradisperse diamond (UDD) obtained by the detonation method. The samples studied were of two types, namely, prepared by the “dry” and “wet” techniques, which differ in the cooling rate of the detonat…
This paper provides a review of synthesis of the phthalocyanines containing various macrocycles at the peripheral position of the benzene rings. They are expected to be suitable to change the chemical and physical properties toward the need of technologycal applications. In addition, transition and alkali metal phthal…
Fluorescence spectroscopy, surface-enhanced Raman spectroscopy (SERS), and analytical centrifugation are applied in this work to study the interaction of the antitumor drug 9-aminoacridine (9AA) with a trypsin-like protease, guanidinobenzoatase (GB), extracted from an Erlich tumor. As a consequence of this interaction…