Analytical expressions of the effectiveness factor of a biocatalytic membrane reactor, and its asymptote as the Thiele modulus becomes large, are presented. The evaluation of the effectiveness factor is based on the solution of the governing equations for solute transport in the two regions of the reactor, i.e. the lumen and the matrix (with the biofilm immobilized in the matrix). The lumen sol...

Heterogeneous catalysis is vital for a number of chemical, refinery and pollution control processes. The use of catalyst pellets of hollow cylindrical shape provide several distinct advantages over other common shapes, and can therefore help to enhance conversion levels in reactors. A better utilization of the catalytic material is probably most notable of these features due to the absence of t...

This paper tries to study the role of self-esteem and self-effectiveness for the relation between Islamic life style and social adaptation among the youth in Mashhad. The data was gathered from the questionnaire about 235 young people. Two different questionnaires were used for gathering data. By lisrel and SPSS  software, the data were analyzed. Statistical tests like factor analysis show that...