Materials Literature
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The width of domain boundaries is an important parameter for the characterization of microphase separation in polymers. This parameter is often obtained by measurements of small-angle X-ray scattering (SAXS) in the range of validity of Porod's law, according to which X-ray intensity scattered by an ideal two-phase sys…
This is the first of a two-part series describing the formulation of a computer-aided simulation of the ring-spinning process. The unique feature of this model is a formalized model of yarn breakage in the spinning process. This model takes into consideration specific features of the spinning process, the structure an…
Various separation methods for cuticle isolation from whole wool have been studied. A method involving agitation of wool fibres in formic acid proved to be successful, producing a high yield of cuticle cells relatively free from contaminating cortical cells. The cuticle cells so isolated were characterised by amino ac…
We report the rapid modification of the palladium 3d photoelectron spectrum obtained from a mixed PdCl2/PVP (polyvinylpyrrolidone) film on glass. Chemical transformation of up to one-third of the Pd is observed under XPS analysis conditions that are routinely used for swift survey scans. The alterations can be assigne…
Enterolith fragments from two tapir species and horses were subjected to x-ray diffraction analysis. Tapir enteroliths were formed as layers of mineral deposited around a foreign nidus. The structure was similar to that of equine enteroliths except that tapir enteroliths lacked a central region of radially symmetrical…
The crystalline lanthanide complexes (except Ce and Pm) with proline were synthesized. The general formula of [Ln(Pro)2(H2O)4]3(ClO4)3 of the complexes were obtained from chemical analysis, elemental analysis, TG-DTA analysis and electrical conductivity. Infrared spectra reveal a considerable shift of the symmetric co…
An investigation of cone calorimeter test procedures was performed using two types of mattress composites with various specimen preparations and equipment configurations. The objective was to discover suitable procedures for testing mattress composites. Concurrent with this work a much larger and more sophisticated pr…
Effects of fibre morphology on in-plane hygroexpansivity of paper have been studied using a general micromechanics formula and experimental results obtained for different fibre fractions. It was deduced from the micro-mechanics analysis that the major fibre geometry factors affecting paper hygroexpansivity are fibre w…
Phase transformations during the isothermal heat treatments of alkaline-earth aluminosilicate glasses with compositions of RO⋅Al2O3⋅2SiO2 (R=Mg, Ca, Sr, Ba) were studied based on the time-temperature-transformation (TTT) diagram. The crystallization conditions of metastable and stable phases such as cordierite (MgO⋅Al…
Ceramic based nanocomposites can be divided into three categories: intragranular nanocomposite, intergranular nanocomposite and nano/nano composite. The intra- and intergranular nanocomposites, in which nano-sized particulates were dispersed within the matrix grains or at the grain boundaries respectively, were found…
Crack initiation and propagation process in delayed fracture of high tensile strength steel bolt have been studied by Fracture-surface topography analysis (FRASTA) method. The delayed fracture process thus involves a series of crack initiations rather than the continuous growth of a single crack. Crack initiates at th…
When M cells derived from rat liver and then transformed by treatment with 4-dimethylaminoazobenzene were cultured in vitro, the culture became covered with a collagen fiber network. When the M cells were cultured in the presence of more than 10 micrograms/ml heparin, no collagen fiber formation was observed. The inhi…
Numerous implements used in the mining and agricultural sectors undergo constant wear and so require frequent replacement, resulting in significant financial losses. One way of reducing wear related problems is through surface engineering of the wear prone surface. A variety of surface engineering techniques are comme…
The transformers described here are in the multi-megawatt range. They are rapidly becoming more important and have characteristics and features that are different in many ways from those of normal power transformers. Information about them has been incomplete, scattered and hard to find in the literature. Harmonics ar…
Mixed Ni–Mo–W oxides have been prepared by decomposition at 873 K of Anderson-type [NiMo 6-x W x O 24 H 6 ](NH 4 ) 4 5H 2 O (x=0, 2, 3, 4, 6) heteropolyoxometallates. Thermal analysis of the precursors, X-ray diffraction and Raman spectroscopy on the mixed oxides were performed. X-Ray powder patterns, collected at the…
Abstract The clay minerals, kaolin and montmorillonite, were compacted at different pressures up to 300 MPa. The textural characteristics (pore radius, surface area and porosity) of the clay minerals were measured after compaction and related to the particle size and the cation exchange capacity of these clays. Kaolin…
Abstract We measured the absolute rate constants for the hydrogen peroxide oxidation of two different octyl dimethyl amines in isopropanol/water mixtures at 23°C. The amines were 1‐octyl dimethyl amine ( 1 ) and 2‐ethylhexyl dimethyl amine ( 2 ); their structures were analogous to those most often encountered in comme…
One type of localized corrosion, known as “ant's nest corrosion”, in copper tubes is caused by decomposition products from chlorinated organic solvent and some types of lubricant oil. The decomposition products include carboxylic acids, acetates, formates and chlorides. Vinegar is mainly composed of acetic acid, which…
A pseudo-isopiestic method was employed to determine magnesium vapor pressures over liquid magnesium-yttrium alloys. From these, magnesium activities derived and converted to a common temperature of 1173 K using partial enthalpy values from literature. Experimental problems observed in the course of this investigation…
The effect of coordination number on 27Al NMR chemical shift was studied using ab initio molecular orbital calculation. In order to mimic Al of four-, five- and six-coordinations Al, the clusters of Al(OH)4-, Al(OH)52- and Al(OH)63- were employed for the calculation. The obtained shifts for Al(OH)4-, Al(OH)52- and Al(…