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  • 1
    Electronic Resource
    Electronic Resource
    Preparation, characterization, and catalytic behavior of MoRh2O6 supported on SiO2 (1991)
    Springer
    Catalysis letters 9 (1991), S. 331-337 
    Details
    ISSN: 1572-879X
    Keywords: Rh-Mo double oxide ; rhodium molybdenum alloy ; metal-oxide interaction ; dehydrogenation and hydrogenolysis of cyclohexane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Rh double-oxide compound (MoRh2O6) supported on SiO2 was prepared by air calcination treatment of a molybdenum oxide-promoted Rh/SiO2 catalyst at 700 °C, and the chemisorptive and catalytic properties of the compound, as well as the changes in those behaviors by H2 reduction, have been studied. The MoRh2O6/SiO2 catalyst exhibited almost no ability of H2 and CO chemisorption, but a high activity for CO oxidation reaction. After H2 treatment at 200 °C, X-ray diffraction showed that the MoRh2O6 compound was reduced to a MoRh alloy, and this catalyst now exhibited a significant activity for the hydrogenolysis of cyclohexane. A drastic decrease in the activity was, however, observed after H2 treatment at 500 °C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00764823
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  • 2
    Electronic Resource
    Electronic Resource
    The chloroplast chlL gene of the green alga Chlorella vulgaris C-27 contains a self-splicing group I intron (1996)
    Springer
    Molecular genetics and genomics 250 (1996), S. 655-664 
    Details
    ISSN: 1617-4623
    Keywords: Key words Self-splicing ; chlL ; Group I intron ; Chlorella ; Chloroplast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The chlL gene product is involved in the light-independent synthesis of chlorophyll in photosynthetic bacteria, green algae and non-flowering plants. The chloroplast genome of Chlorella vulgaris strain C-27 contains the first example of a split chlL gene, which is interrupted by a 951 bp group I intron in the coding region. In vitro synthesized pre-mRNA containing the entire intron and parts of the flanking exon sequences is able to efficiently self-splice in vitro in the presence of a divalent and a monovalent cation and GTP, to yield the ligated exons and other splicing intermediates characteristic of self-splicing group I introns. The 5′ and 3′ splice sites were confirmed by cDNA sequencing and the products of the splicing reaction were characterized by primer extension analysis. The absence of a significant ORF in the long P9 region (522 nt), separating the catalytic core from the 3′ splice site, makes this intron different from the other known examples of group I introns. Guanosine-mediated attack at the 3′ splice site and the presence of G-exchange reaction sites internal to the intron are some other properties demonstrated for the first time by an intron of a protein-coding plastid gene.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02172976
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    Paper (German National Licenses)
    Fulltext
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