We report that micromolar concentrations of lanthanide ions can be required cofactors for DNAhydrolyzing deoxyribozymes. Previous work identified deoxyribozymes that simultaneously require both Zn and Mn to achieve DNA-catalyzed DNA hydrolysis (10 rate enhancement); a mutant of one such DNA catalyst requires only Zn. Here we show that in vitro selection in the presence of 10 mM lanthanide ion (...

In this study, nano-structure ceria with three different morphologies (nanorod, nanoparticle and flake) have been prepared by hydrothermal and solvothermal methods. The ceria samples were deeply characterized by XRD, SEM, TEM, H2-TPR, XPS and in-situ DRIFTS, and tested for soot combustion in absence/presence NO atmospheres under loose and tight contact conditions. The prepared ceria samples exh...

Systems based on Ce-Zr are used in catalytic converters for their oxygen storage ability. Recently, their application for soot abatement is under investigation. In this paper, preliminary results of the performance of Ce-Zr systems with the addition of K are reported by varying potassium content and calcination temperature. The powder catalysts were prepared by a variant of the citrates route d...

Nanophase (Ce, Zr, Pr)O2-doped alumina coatings were prepared by impregnating the cordierite ceramic honeycomb in the sol or in the slurry of already calcined powder, respectively. The effects of preparation methods on the crystal phase, texture, oxygen storage capacity (OSC), reducibility, surface morphology and thermal stability of coatings were investigated by X-ray diffraction (XRD), the Br...

We report that micromolar concentrations of lanthanide ions can be required cofactors for DNA-hydrolyzing deoxyribozymes. Previous work identified deoxyribozymes that simultaneously require both Zn(2+) and Mn(2+) to achieve DNA-catalyzed DNA hydrolysis (10(12) rate enhancement); a mutant of one such DNA catalyst requires only Zn(2+). Here we show that in vitro selection in the presence of 10 µM...

A propane combustion catalyst based on Mn and Ce supported by SBA-15 was prepared the “two-solvents” method aiming at possible application in catalytic converters for abatement of alkanes waste (exhaust) gases. The characterization carried out SAXS, N2-physisorption, XRD, TEM, XPS, EPR H2-TPR methods. catalysts’ performance evaluated tests methane, butane. reaction kinetics investigation showed...

A novel two-stage pyrolysis-plasma/catalysis process has been developed for hydrogen production from waste biomass. Investigation into; the comparison of biopolymers, cellulose and lignin; effect Mg, Co, Ce, Cu, Fe Ni as promoter metals added to a Ni-Al2O3 catalyst; influence catalyst support material in relation was carried out. The combination plasma catalysis produced highest total gas yield...

The catalytic performance of AuxPdy nanoparticles prepared by colloidal synthesis and immobilised on ceria nanorods (Ce-NR) in the selective oxidation glucose has been studied under initially basic relatively mild conditions. Activity was found to be strongly dependent bimetallic composition with Au-rich catalysts being more active oxidation. Catalyst recycling revealed negligible deactivation ...