BACKGROUND Different studies have shown that cellular enzymatic activities are able to self-organize spontaneously, forming a metabolic core of reactive processes that remain active under different growth conditions while the rest of the molecular catalytic reactions exhibit structural plasticity. This global cellular metabolic structure appears to be an intrinsic characteristic common to all c...

Metabolites of arachidonic acid produced by P450 are interesting substances with prominent physiological functions. To elucidate the physiological function of P450, it is necessary to identify a specific P450 in a particular tissue or organ and to characterize its catalytic activities. In this study, the expression of CYP2A1, 2B1, 2C23, 2J3, and 4F1 was investigated in liver, lung, kidney, sple...

Biochemical reactions in a cell can be modeled by a catalytic reaction network (CRN). It has been reported that catalytic chain reactions occur intermittently in the CRN with a homogeneous random-graph topology and its avalanche-size distribution obeys a power law with the exponent 4/3 [A. Awazu and K. Kaneko, Phys. Rev. E 80, 010902(R) (2009)]. This fact indicates that the catalytic reaction d...

The performance stability and regeneration property of catalytic membranes should be considered from a practical viewpoint. In this review, recent works concerning issue have been comprehensively summarized. was first summarized in terms the two commonly employed evaluation ways, i.e., multi-cycle experiments long-time filtration. main deactivation reasons included adsorption pollutants its oxi...

Copolymerization of ethylene with 1-hexene was carried out using two ansa-fluorenyl titanium derivative complexes. The substituent effect on the catalytic activity, monomer reactivity ratio and polymer property was investigated. It was found that the presence of t-Bu groups on fluorenyl ring exhibited remarkable catalytic activity and produced polymer with high molecular weight. However, these ...

A simple and effective strategy is developed to realize visible light-driven heterogeneous asymmetric catalysis. A chiral organic molecule, which only has very weak catalytic activity in asymmetric α-alkylation of aldehydes under visible light, is utilized as the ligand to coordinate with different types of metal ions, including Zn2+, Zr4+, and Ti4+, for construction of crystalline metal organi...