The effects of various operating conditions including transmembrane pressure, suspension concentration and crossfl ow velocities for the microfi ltration of micro-sized suspensions were experimentally investigated. The experiments were carried out with suspensions of bentonite particles with particle diameters of 0.5-100 μm using 0.1 μm tubular ceramic membranes. The step by step technique was used to determine the values of the critical fl ux and infl uence of the high frequency backfl ushing was analysed. It was found that the permeate fl ux is signifi cantly depend on the suspension concentration and crossfl ow velocity. High permeate fl uxes were obtained at low concentration 1 g.l −1 and/or at high velocity 2.2 ms −1 .

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Article deals with definition of conformity and presentation of results of research of conformal behaviour of University of Zilina students. Aim of research was confirmation of presumption, that conformal or no conformal behaviour of students is affected by season of university study. Results of research showed significant differences between answers of men and women. Woman tend to be more conformal and men tend to by less conformal. Then the article presents analysis of sex as determinant of conformal behaviour. Besides that, we tested also relations between several phenomena. Our assumptions were formulated into hypotheses, which were statistically tested. Chi square was applied to determine relationship between selected phenomena. Then the quality of relations was tested by correlation coefficient (Phi-coefficient, Cramer V-coefficient). Extremely strong correlation did prove in neither case, but we identified two cases of moderate to substantial correlations.