The reaction site of the Co(II) porphyrin created by an amide group and coordinating 1,2-dimethylimidazole at the fifth site activated an O2 molecule, and then hydroxylated the meso-carbon of the ligand. The biomimic O2 activation under mild conditions is described.

Selective carbon-carbon and carbon-heteroatom bond cleavage was achieved in a one reaction system. With this strategy a novel Pd/Cu-catalyzed aerobic oxidative oxosulfonation of olefins with DMSO has been developed. Preliminary mechanistic investigations indicated that CO/O2 assisted the bond cleavage and the leaving groups from the starting materials were trapped by O2 and underwent a hydroxyl...

Provision of sustainable transportation fuels is required for the energetic transition. A new process presented production synthetic sulfur free maritime fuel. This fuel produced by Co-catalyzed Fischer-Tropsch synthesis (FTS) using syngas based on a plasma technology that contains traces O2. Gravimetric experiments and steady state measurements with Co/Pt/Al2O3 catalyst at low temperature FTS ...

Ni–Fe carbon monoxide dehydrogenases (CODHs) are nearly diffusion-limited biocatalysts that oxidize CO. Their O2 sensitivity, however, is a major drawback for industrial applications. Here we compare the structures of fast CODH with high sensitivity (ChCODH-II) and slower lower (ChCODH-IV) (Ch, Carboxydothermus hydrogenoformans). Some variants obtained by simple point mutations bottleneck resid...

In this study, the malondialdehyde (MDA) levels in the muscle, liver and kidney tissues and the antioxidant vitamin (A, C, E) levels in the muscle tissue of juvenile rainbow trout were investigated under different oxygen levels (3.5 mg O2/l, 4.5 mg O2/l and 7 mg O2/l) at the end of the 8 hour trial. Fish (initial weight and length, 30.19±2.2 g and 13.15±0.22 cm, respectively) were distributed i...

In this study, the malondialdehyde (MDA) levels in the muscle, liver and kidney tissues and the antioxidant vitamin (A, C, E) levels in the muscle tissue of juvenile rainbow trout were investigated under different oxygen levels (3.5 mg O2/l, 4.5 mg O2/l and 7 mg O2/l) at the end of the 8 hour trial. Fish (initial weight and length, 30.19±2.2 g and 13.15±0.22 cm, respectively) were dis...

Well-defined model catalyst samples, prepared under ultra-high-vacuum (UHV) conditions, hold the potential of bridging the gap between traditional surface science and technical catalysis studies. However, work remains to understand and characterize reaction kinetics of such samples under more realistic pressure conditions, specifically, how reaction kinetics of a well-studied reaction (such as ...

Investigation of atomically precise Au nanoclusters provides a route to understand the roles of coordination, size, and ligand effects on Au catalysis. Herein, we explored the catalytic behavior of a newly synthesized Au22(L8)6 nanocluster (L = 1,8-bis(diphenylphosphino) octane) with in situ uncoordinated Au sites supported on TiO2, CeO2, and Al2O3. Stability of the supported Au22 nanoclusters ...

The present paper reports a spectroscopic and kinetic study of the reaction with oxygen and carbon monoxide of (a) the abnormal hemoglobin Zürich (beta 63, E7 His leads to Arg), (b) its isolated abnormal chains (beta ZH), and (c) a reconstituted hybrid containing cobalt instead of iron on the normal alpha chains (Co alpha)2-(Fe beta ZH)2. The abnormal beta ZH chains, isolated from hemoglobin Zü...