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  • Ceruloplasmin  (1)
  • Cu-ZSM-5  (1)
  • Deletion analysis  (1)
  • 1
    ISSN: 1572-879X
    Keywords: NOx abatement ; Cu-ZSM-5 ; Cu-Y zeolite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract NO decomposition was studied on Cu-ZSM-5 (Cu exchange extent from 23 to 210%) and Cu-Y (Cu exchange extent from 5 to 105%) catalysts at 773 K. The results show that the activity (NO molecules decomposed per gram of catalyst per second) increases by roughly 100-fold when the extent of exchange with copper in the ZSM-5 framework increases from 80 to 100%. This behaviour shows that not all Cu sites are equivalent in their decomposition activity. Cu-ZSM-5 samples prepared with either H-ZSM-5 or Na-ZSM-5 show the same activity pattern.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Clinical rheumatology 3 (1984), S. 189-193 
    ISSN: 1434-9949
    Keywords: Psoriatic Arthritis ; Copper ; Iron ; Ceruloplasmin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serum copper, iron and ceruloplasmin concentrations were determined in 45 subjects (22 males and 23 females, medium age 50.3, range 25–76) diagnosed as psoriatic arthritic patients (20 with poliarticular, 12 with monooligoarticular and 13 with spondyloarticular form), in 63 patients (30 males and 33 females, medium age 32.4, range 10–78) with psoriasis, and in 60 blood donors (32 women and 28 men) as reference group. Mean serum copper,iron and ceruloplasmin was significantly increased (p〈.001) in psoriatic arthritis as compared with controls or subjects with psoriasis alone. The number of synovial joints affected was significantly correlated to changes in these serum parameters. Indeed, serum copper, iron and ceruloplasmin were found to be significantly different from that of normals in the polyarticular subgroup (p〈.001), while only copper and ceruloplasmin were different in the mono-oligoarticular form (p〈.001 and p〈.01 respectively). No significant changes were found in a spondyloarticular subgroup. In the polyarticular subgroup a direct correlation was found between another disease activity marker (e.g. ESR) and serum changes in iron, ceruloplasmin and copper (p〈.001). Our data indicate that psoriatic arthritis is a multifaceted disease: the polyarticular form behaves like seronegative rheumatoid arthritis, while the monoarticular forms shows a lesser involvement of serum iron; spondylitic arthritis does not show any significant change in serum copper, ceruloplasmin and iron concentrations.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1617-4623
    Keywords: Nitrogen assimilation ; Gene regulation ; Promoter ; Deletion analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The cloning and sequence determination is reported of the DNA region of Rhizobium leguminosarum coding for glutamine synthetase II (GSII). An open reading frame (ORF) encoding 326 amino acids was defined as the glnII gene on the basis of its similarity to other glnII genes and the ability of a DNA fragment carrying this ORF to complement the glutamine auxotrophy of a Klebsiella pneumoniae glnA mutant. We find that the glnII gene in R. leguminosarum is transcribed as a monocistronic unit from a single promoter, which shows structural features characteristic of rpoN(ntrA)-dependent promoters. In K. pneumoniae, such promoters require the ntrC and rpoN(ntrA) gene products for transcription. The intracellular level of glnII mRNA changes when R. leguminosarum is grown on different nitrogen sources, as expected for regulation by the nitrogen regulatory system. Promoter deletion analysis has shown that an extensive upstream DNA sequence (316 bp) is essential for in vivo activation of the glnII promoter in different biovars of R. leguminosarum. This DNA region requires a wild-type ntrC gene for activity and includes two conserved putative NtrC-binding site sequences. The results conclusively show that transcription from the R. leguminosarum glnII promoter is fully dependent on positive control by NtrC protein and on an upstream activator sequence (UAS).
    Type of Medium: Electronic Resource
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