This study deals with the size measurement of non-spherical or because the particles adopt preferential orientations in the particles by the laser diffraction technique. Size analyses of measurement cell. Further, a way of processing diffraction data three sets of identical metallic bodies (cubes, tablets and is proposed in order to determine two characteristic dimensions cylinders) were performed by means of a Malvern 2600 instru-of identical anisometric particles. It is based on the measurement. The results prove that under the operating conditions ment of the minimum and maximum projected surface areas of chosen and in the case of anisometric objects, the mean total the particles. The experimental results obtained with our parsurface area is not measurable either because the Malvern soft-ticles show the procedure to be reliable. ware, strictly valid for spheres, is not applicable to such particles

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SolubWtles of D-xylose and D-mannose were measured In water-ethanol mixtures at 25 °C, In the concentration range of 0-100 wt % ethanol. Sugar solutions were analyzed by two methods: direct refractometry and high-pressure liquid chromatography.

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