In combination with basal Murashige and Skoog (MS) medium, the effects of
cytokinins on growth and development of isolated meristem tips of grapevine were tested. Axillary bud formation was induced and cultures of continually proliferating shoots of 8 clones of grapevine were derived on MS medium supplemented with 10 μM 6-benzylaminopurine. Factors inducing in vitro rooting of shoots were studied. Half strength MS medium with the addition of 0.1 μM β-indolebutyric acid was effective for root formation in most tested clones. The hormonal control of growth and development of meristem tips, as well as the significance Roshe0124-Shoes Roshe Trainers Men Black Gray Lemon
of in vitro propagation for long-term storage and clonal selection of grapevine cultivars, are discussed.
The influence of the container walls on the pressure drop of packed beds is investigated. A detailed analysis of more than 2300 experimental data points reveals the Reynolds number dependence of this effect. Physical evidence is given that the observed behavior is caused Free 3.0 V4 Men Shoes Black Red Charm
by the counteracting effects of the wall friction and the increased porosity near external boundaries. A comparison of the predictions of 24 published pressure drop correlations with available experimental data shows that Reichelt's approach (Chem. Ing. Tech. 44 (1972) 1068) of correcting the Ergun equation for the wall effect is the most promising one. Improved correlations are obtained for different types of packings by fitting the coefficients of that equation to the database.