Security Considerations in Orientation Project

Abstract: There is a research in John vo

Sustainable synthesis of azobenzenes, quinolines and quinoxalines via oxidative dehydrogenative couplings catalysed by reusable transition metal oxide–Bi( iii ) cooperative catalysts

Heterogeneous catalytic oxidative dehydrogenative processes for N-heterocycles are presented, which enable waste-minimized (additive-, oxidant-, base-free), efficient cyclisations/couplings via transition metal oxide–Bi( iii ) cooperative catalysis

An elastic phenomenological material law for textile composites and it's fitting to experimental data

Constitutive description of deformations in technical textiles mostly requires some highly nonlinear material law due to the interaction between the orthotropic yarns and the effect of the matrix. Phenomenological models aim to garb the overall (macro level) behavior required for engineering purposes. This paper introduces a new, two-dimensional phenomenological model for technical textiles accompanied with a data acquiring strategy to determine the material parameters involved in the model. It handles the nonlinear stress-strain relation observed in uniaxial tests and take the interactions in the two, orthogonal directions into account. As we aim to introduce a solution applicable at the service level of the loads, our model is inherently elastic, no time dependent or plastic behavior are introduced. The model can be solidly fit to the measured data

Selective production of imines and benzimidazoles by cooperative bismuth(III)/transition metal ion catalysis

Cooperative Bi(III)/Co(II) and Bi(III)/Mn(II) heterogeneous catalysts have been developed enabling efficient oxidative annulations for preparing both cross-coupled imines and benzimidazoles under ambient conditions in an atom-economic and time-efficient manner, involving ambient air as oxidant and without the need of any other additives. This is the first synergistic Lewis acid/transition metal catalyzed annulation which is potentiated by the interfaces between the building blocks of the catalysts. To achieve our goals, a useful fabrication process has been developed to heterogenize the transition metal ions via strong interactions on well-known Sillèn-type bismuth subcarbonate (bismutite). Their reusability, activity and selectivity as well as water-tolerance have made them potential competitors to effective heterogeneous/homogeneous catalysts reported previously