The isolation of erysimoside from the seeds ofErysimum canescens

Chemistry of Natural Compounds -     

Decomposition of Co2TiO4 spinel below 1000 K

Co₂TiO₄ spinel was found to decompose to the mixture of CoTiO₃ ilmenite and Co₃O₄ spinel below 1000 K. The decomposition rate was the larger for the sample ground for the longer period. It showed a maximum around 870–920 K which seemed to appear from the balance between the rate increase by diffusion and the decrease of nucleation probability with temperature. The thermodynamical consideration supported the experimental results.     

Nucleophilic substitution in 5,6,7,8-tetrafluoro- and 6,7-difluoro-1,2,3,4-tetrahydro-9-alkenyl-1,4-methanonaphthalenes and related compounds. A search for homoallylic conjugation

The second-order rate constants for the nucleophilic replacement of fluorine by isopropoxide in 5,6,7,8-tetrafluoro- and 6,7,-difluoro-1,2,3,4-tetrahydro-9-alkenyl-1,4-methanonaphthalenes and related 9-alkyl systems have been measured. A factor of 6 - 7 separates the most reactive compounds [the 9- (4′-trifluoromethylbenzylidene) derivatives] from the least reactive compounds [the syn-9-isopropyl derivatives] in both the tetrafluoro- and difluoro-series. It is concluded for these small reactivity differences.     

Influence of nitrogen and phosphorus on thein situ bioremediation of trichloroethylene

Applied Biochemistry and Biotechnology - The US Department of Energy, Office of Technology Development, has supported a field-scalein situ demonstration of trichloroethylene (TCE) bioremediation at...