the catalyst pt-ta supported on 7-alumina was prepared by impregnation with solution containing compoundsof ii21k1.0. and ta205 the pt concentration was kept constant at 0.2 vet% while the concentration of thetantalum was 0,4 wt%. the activity and selectivity of catalyst were determined under conditions at 450-500 °cand 15-30 atm.. with molar ratio h2/c[h,e5 and wh=1.5ml/h for converted n-hepta...

Przyczyny i skutki wydatków na cele wojskowe pozostają jednym z kluczowych obszarów geopolityki debaty publicznej. Często stwierdza się, że zwiększenie budżetu obronność może pobudzić gospodarkę poprzez produkcji sprzętu wojskowego. To, co powinno wówczas wystąpić, to sprzężenie zwrotne pomiędzy wydatkami wojskowymi a stanem gospodarki. Zasadniczym celem artykułu jest zbadanie wskazanej odwrotn...

nitration of phenol and various 4-substituted phenols with cu(no3)2.3h2o, cu(no3)2.3h2o/sio2, 9h2o and cr(no3)2. 9h2o in different anhydrous organic solvents are investigated. high selectivity ratio of para vs ortho isomers has been observed. mono- and dinitro compounds from phenol and 4-substituted phenols by choosing the proper solvents and reaction conditions, are also obtained with high sel...

Estimates of developmental models of processes involving contextual influences (e.g., child care arrangements, divorce, parenting, neighborhood location, peers) are subject to bias if, as is often the case, the contexts are influenced by the actions of either the individuals being studied or their parents or teachers. We assessed the nature of the endogeneity biases that may result, discuss the...

Purpose of this study is to investigate the relation between board monitoring and firm performance after controlling the endogeneity and multicollinearity problem that exist in most corporate governance research. Prior studies failed to establish any significant relationship between board monitoring and firm performance because of not properly control for endogeneity and multicollinearity probl...