Cdc25 phosphatases are dual specificity phosphatases that dephosphorylate and activate cyclin-dependent kinases (CDKs), thereby effecting the progression from one phase of the cell cycle to the next. Despite its central role in the cell cycle, relatively little is known about the catalytic mechanism of Cdc25. In order to provide insights into the catalytic mechanism of Cdc25, we have performed ...

The review is dedicated to the topical field of research aimed at creating catalysts combining several types active sites. At same time, composition Fischer–Tropsch synthesis (FTS) products can be controlled by changing strength and concentration sites inter-site distances. A comparative analysis literature data allows formulate main principles catalytic particles formation in FTS acid-catalyze...

Heterogeneous catalysis and their application in industrial-scale organic synthesis of fine chemicals are greatly facilitated by catalysis and further on by catalyst recovery and recycles to fits most “principles of green chemistry. In acid media, terpenoids generally undergoes various transformations. The terpenoid transformations include various liquid Bronsted and Lewis Acids, Acid clays, He...

Protic ionic liquids (PILs) are currently being shown to be as interesting and valuable to chemical manipulations as the well-known aprotic ionic liquids (APIL). PILs have the additional advantage that the proton activity (PA) can be adjusted by the choice of Bronsted base and Bronsted acid used in their formation. In the absence of solvent, the PA plays the role of pH in ordinary solutions. Pr...

AB S TRACT: Montmorillonites ion-exchanged with Li +, Na +, K § Ca 2+, Mg 2+ and Ni 2+ and acidic clay were used as catalysts for the polymerization of a cyclic siloxane monomer, 2,4,6,8tetramethylcyclotetrasiloxane. Montmorillonites with Ni 2+ and Mg 2+ in the interlayer, and acidic clay exhibit a greater ability for siloxane polymerization in both yield and mean molecular weight of products t...

In this article, a series of effective catalysts based on betaine and sulfuric or phosphomolybdic acids was obtained. These compositions were characterized by various physicochemical methods tested in the oxidation sulfur- nitrogenous-containing compounds H2O2. An increase amount heteropolyacid (HPA) leads to non-linear change acidity, degree removal sulfur-containing correlates with concentrat...

A series of metal ion (M = Sn2+, Fe3+, Ni2+, Co2+, Ag+, Cu2+) exchanged tungstophosphoric acid (H3PW12O40; TPA) catalysts with tunable Bronsted/Lewis acidity were synthesized and exploited for the oxidation benzyl alcohol (BzOH) to benzaldehyde (BzH) using hydrogen peroxide (H2O2) as oxidant. The structure these M-TPA composite salts was also characterized by Fourier transform infrared spectros...

One of the most trending topics in catalysis recently is use renewable sources and/or non-waste technologies to generate products with high added value. That why, present review resumes advances catalyst design for biomass chemical valorization. The variety involved reactions and functionality obtained molecules requires multifunctional able increase efficiency selectivity selected process. glu...