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  • 2000-2004  (5)
  • oxidative dehydrogenation  (2)
  • GRGDS  (1)
  • Head and Neck Squamous Cell Carcinoma  (1)
  • MHC  (1)
Source
Material
Years
  • 2000-2004  (5)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Promoting effect of carbon dioxide on the dehydrogenation and aromatization of ethane over gallium‐loaded catalysts (2000)
    Springer
    Catalysis letters 64 (2000), S. 215-221 
    Details
    ISSN: 1572-879X
    Keywords: gallium oxide ; titanium oxide ; carbon dioxide ; oxidative dehydrogenation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ga2O3 and Ga2O3/TiO2 catalysts were found to be effective agents for the dehydrogenation of ethane to ethene in the presence of carbon dioxide at 650 °C. The activity of the Ga2O3 and Ga2O3/TiO2 catalysts in the presence of CO2 was 2–4 times higher than that without CO2. Ethene yields reached ca. 20–25% and selectivity was ca. 70–90% at 650°C in the 17% ethane and 83% CO2 feed at an SV of 9,000 ml/(g‐cat h). The presence of CO2 markedly promoted dehydrogenation of ethane over Ga2O3 and Ga2O3/TiO2 catalysts. Furthermore, the promoting effect of CO2 on the aromatization of ethane and ethene over a Ga2O3+H/ZSM‐5 catalyst was also observed above 650 °C. Aromatics yields were higher than those without CO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019047306179
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dehydrogenation of isopropylbenzene with vanadium-oxide-loaded activated carbon catalyst in the presence of carbon dioxide (2000)
    Springer
    Catalysis letters 69 (2000), S. 59-64 
    Details
    ISSN: 1572-879X
    Keywords: dehydrogenation ; oxidative dehydrogenation ; cumene ; α-methylstyrene ; vanadium oxide ; activated carbon ; temperature-programmed reduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Dehydrogenation of isopropylbenzene to α-methylstyrene was carried out using various supported metal oxide catalysts in the presence of carbon dioxide. An activated carbon-supported vanadium oxide catalyst afforded a high activity in carbon dioxide atmosphere: the α-methylstyrene yield in carbon dioxide atmosphere was two times greater than that in an argon atmosphere at 723 K. In order to investigate the role of carbon dioxide in this reaction, we carried out temperature-programmed reduction (TPR) studies using both fresh and used catalysts. The TPR profiles clearly indicate that carbon dioxide could keep the surface of vanadium oxide at a high oxidation state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019084915149
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The [HLA-B18, F1C30, DR3] Conserved Extended Haplotype Carries a Susceptibility Gene for IgD Deficiency (2000)
    Springer
    Journal of clinical immunology 20 (2000), S. 216-220 
    Details
    ISSN: 1573-2592
    Keywords: IgD deficiency ; MHC ; extended haplotype ; Basques
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We showed previously that the conserved extended MHC haplotype [HLA-B8, SC01, DR3] carries recessive susceptibility genes for IgA and IgG4 deficiency and dominant genes for IgD and IgG3 deficiency. [HLA-B18, F1C30, DR3] has similar class II and III regions to [HLA-B8, SC01, DR3] and is common in the Basques. We therefore studied serum immunoglobulin concentrations in Basque homozygotes, heterozygotes, and noncarriers of (F1C30, DRB1*0301, DRB3*02, DQA1*0501, DQB1*0201) (F1C30, DR3). As shown by others, no subjects were deficient in IgA, IgM, or IgG subclasses. In contrast, 29% of homozygotes and three of seven double heterozygotes with (SC01, DRB1*0301, DRB3*0101, DQA1*0501, DQB1*0201) (presumed homozygotes for IgD deficiency susceptibility genes) were IgD deficient. Thus, 32% of presumed homozygotes were IgD deficient compared with 1.6% of noncarriers. Of haplotype heterozygotes, 25% were IgD deficient. The high frequency of IgD deficiency in both homozygotes and heterozygotes for (F1C30, DR3) suggests a partially penetrant dominant susceptibility gene for IgD deficiency on [HLA-B18, F1C30, DR3].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006693614974
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Conjugation of Arg-Gly-Asp sequence into thermo-reversible gel as an extracellular matrix for 3T3-L1 fibroblast cell culture (2000)
    Springer
    Biotechnology letters 22 (2000), S. 1553-1556 
    Details
    ISSN: 1573-6776
    Keywords: fibroblast cell ; gel ; GRGDS ; integrin family ; N-isopropylacrylamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract High molecular weight N-isopropylacrylamide copolymers with small amounts of acrylic acid (typically 2–5 mol% in feed) were synthesized by free radical polymerization in benzene and then conjugated with adhesion molecules of Gly-Arg-Gly-Asp-Ser (GRGDS) peptides. Aqueous polymer solutions (5, 6, 8 and 10% w/v) in culture medium (pH 7.4, ionic strength; 0.15 M) with 3T3-L1 fibroblast cells were mixed and poured in Millicells, which supported the gel formation without a significant gel induction time at 36 °C (gelation temperature). The initially formed gel was translucent and became more opaque as the temperature increased. The interaction between fibroblast cells and an artificial matrix of GRGDS containing p(NiPAAm-co-AAc) copolymer gel resulted in effective cell attachment, proliferation and growth. This study supported that specific attachment is the result of the interaction between the integrin families on the fibroblast and the RGD sequence on the p(NiPAAm-co-AAc) copolymer gel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005680800420
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Inactivation of p16INK4a in Primary Tumors and Cell Lines of Head and Neck Squamous Cell Carcinoma (2000)
    Springer
    Molecules and cells 10 (2000), S. 557-565 
    Details
    ISSN: 0219-1032
    Keywords: DNA Methylation ; Head and Neck Squamous Cell Carcinoma ; p16INK4a
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Inactivation of the p16INK4a gene by mutation and deletion is common in head and neck squamous cell carcinoma (HNSCC). The present study demonstrates that hypermethylation of the 5′ CpG islands can serve as an alternative mechanism for the inactivation of the p16INK4a gene in this tumor. We studied 11 HNSCC cell lines and 17 oral squamous cell carcinoma (OSCC) primary tumors for p16INK4a gene status by protein/mRNA and DNA genetic/epigenetic analyses to determine the incidence of its inactivation. Our study indicates that: (1) inactivation of p16 protein is frequent in HNSCC cell lines (6/11, 54.5%) and OSCC primary tumors (15/17, 88.2%), (2) inactivation of p16INK4a protein is commonly associated with the presence of gene alteration such as mutation, homozygous deletion and especially aberrant methylation, and (3) genomic sequencing of bisulfite-modified DNA shows that the carcinoma develops a heterogeneous pattern of hypermethylation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10059-000-0557-8
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    Paper (German National Licenses)
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