The kinetic of Fischer-Tropsch synthesis over a co-precipitated Fe-Ce catalyst was investigated in a fixed bed micro reactor. Experimental conditions were varied as follow: reaction pressure 1-15bar, H¬¬¬2/CO feed ratio of 1-3 and space velocity of 3600-5400 h-1 at the temperature range of 270-310°C. 4 models according to the Langmuir-Hinshelwood-Hougen-Watson (LHHW) type rate equation were der...

biotin is a water-soluble vitamin and co-factor for activation of carboxylases apoenzymes. biotinidase enzyme is essential for release of biotin from apoenzymes. absence of biotinidase is an autosomal recessive trait with a prevalence of 1 in 60000. clinical manifestations of biotinidase deficiency include dermatitis, alopecia, seizures, hypotonia, developmental delay, hearing loss, visual impa...

The Hcp-Fe7C3 phase has attracted more attention due to the high catalytic activity in Fischer–Tropsch synthesis (FTS) reactions. In this work, adsorption and activation of CO on a Co-doped hcp-Fe7C3 catalyst were investigated by density functional theory (DFT) order understand effect Co doping initial step FTS reactions iron-based catalysts. Different 001 11¯0 surfaces constructed, configurati...

OBJECTIVE To characterize the relationships among UMLS concepts that co-occur as MeSH descriptors in MEDLINE citations (1990-1999). DESIGN 18,485 UMLS concepts involved in 7,928,608 directed pairs of co-occurring concepts were studied. For each directed pair of concepts C1-C2: (i) the "family" of C1 was built, using the UMLS Metathesaurus, and we tested whether or not C2 belonged to C1's fami...

Molybdate ionic liquids active for CO 2 fixation into terminal and internal epoxides without any added halide co-catalysts are described. 95 Mo-NMR spectra demonstrate the interaction activation of with MoO 4 species.