Volume 18, Issue 6 (November 2004)

The contribution describes possibility of image analysis technique for filtering, thresholding and evaluating images in metallography. The method is based on the Fourier transform which converts an image (containing harmonical, periodical components) into reciprocal frequency space where measurements and processing are more suitable for the given case...

The dispersion of lead ores used by a metal smelting factory contributes to a significant contamination of the environment near this industrial site. Here, we have undertaken quantitative elemental macroanalyses, X-ray powder analyses, and elemental and molecular microanalyses of a highly pollutant ore used by this smelter...

This study was aimed at the development of tungsten-10, 20, 30% copper nanocomposites by mechanical alloying. These nanocomposites were heat-treated...

Morphology of water trees that formed in the XLPE insulation of underground HV cables was studied using light microscopy. Field-aged cable samples of three different voltage ratings, 15 kV, 35 kV and 69 kV, in use in Saudi Electricity Company's area of operation in the Eastern Province were collected...

In nanoscale materials the only proof of mechanical properties is the method of nanoindentation. Nanoindentation is a depth sensing hardness measuring technique, so its error sources are different from conventional hardness and microhardness test methods. Surface effects (e.g. roughness, surface hardening caused by preparation process, etc.) or effects of the indentation process itself (e.g. pile-up and sinking in) influence the measured data...

Wheat bran is a major dietary fibre source, comprising mainly hemicelluloses of the arabinoxylan type, and cellulose. Environmental scanning electron microscopy was used to associate wheat bran solubilisation by enzymatic treatments (cellulase, cellobiohydrolase, a-glucosidase, xylanase, arabinofuranosidase, a-xylosidase, a-amylase, a-amylase, amyloglucosidase, a-glucosidase) with tissue structure modifications...