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  • 1
    Electronic Resource
    Electronic Resource
    Expression of an ascidian gene in the tip of the tail of tail-bud-stage embryos (1998)
    Springer
    Development genes and evolution 208 (1998), S. 164-167 
    Details
    ISSN: 1432-041X
    Keywords: Key words Ascidians ; Tail bud ; Tip of the tail ; Specific genes ; SCP/TPX family sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The occurrence of tadpole-type larvae is one of the key events used to understand the origin and evolution of chordates, and the tail bud of chordate embryos is thought to be associated with formation of the tip of the tail. Although some transcriptional factor genes including Brachyury are expressed in the tail bud, no structural genes have been reported to be expressed there. We report here that an ascidian gene HrTT-1 is expressed exclusively in the tip of elongating tail of the tail-bud embryo. This gene encodes a possible secreted protein of 415 amino acids with the SCP/TPX family consensus sequences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004270050169
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oxidation of H-terminated Si(100) surfaces studied by high-resolution electron energy loss spectroscopy (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 5125-5129 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The adsorption of oxygen on H-terminated Si(100) surfaces has been investigated by high-resolution electron energy loss spectroscopy (HREELS). Adsorptions of atomic oxygen occur even at room temperature. Si-OH stretching and Si-O-Si (B1) vibrational modes are observed in HREELS spectra, which indicates that atomic oxygen is adsorbed on sites of Si—H bonds and Si—Si back bonds. On the other hand, H-terminated surfaces are very stable for molecular oxygen, which cannot adsorb until 380 °C on the surface. A dissociative adsorption of molecular oxygen is observed above 380 °C and the activation energy of the adsorption is 2.0 eV at 380–450 °C. This value coincides with the desorption energy of hydrogen atoms from a Si(100) surface with the monohydride phase. These results indicate that the dangling bonds are essential to the adsorption of molecular oxygen on Si(100) surfaces. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359323
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  • 3
    Electronic Resource
    Electronic Resource
    Definite accumulation of enzymatically under-glycosylated IgA1 in rat glomeruli (1999)
    Melbourne, Australia : Blackwell Science Asia Pty. Ltd.
    Nephrology 5 (1999), S. 0 
    Details
    ISSN: 1440-1797
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1440-1797.1999.00088.x
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  • 4
    Electronic Resource
    Electronic Resource
    Diversity in aminoglycoside antibiotic resistance of actinomycetes and its exploitation in the search for novel antibiotics (1996)
    Springer
    Journal of industrial microbiology and biotechnology 17 (1996), S. 352-358 
    Details
    ISSN: 1476-5535
    Keywords: actinomycetes ; aminoglycoside resistance ; aminoglycoside-directed screening
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Wide varieties of multiple aminoglycoside antibiotic (AG) resistance that are not found in knownStreptomyces cultures were found among actinomycetes isolated as AG-resistant. Screening of about 170 AG-resistant isolates demonstrated their high probability (63%) of antibiotic production including the production of eight different AGs. We found specific AG-resistance patterns correlating to the productivity of specific AGs and established an AG-targeted assay system using AG producers as test organisms. Consequently, AG-directed screening totally on the basis of multiple AG-resistance was established. Necessity of biochemical and genetic studies on primary metabolism in order to find a new basis to search for novel metabolites is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01574766
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanisms for cytoprotection by vitamin U from ethanol-induced gastric mucosal damage in rats (1996)
    Springer
    Digestive diseases and sciences 41 (1996), S. 49-54 
    Details
    ISSN: 1573-2568
    Keywords: methylmethioninesulfonium chloride ; vitamin U ; cysteine ; sulfhydryl compounds ; mucin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A comparison was made of the effects of a nonsulfhydryl compound, vitamin U (methylme-thioninesulfonium chloride, MMSC), and a sulfhydryl compound, cysteine (Cys), with regard to the inducement of acute gastric mucosal damage in the presence and absence ofN-ethylmaleimide (NEM), a sulfhydryl-blocking reagent. The effects of MMSC, Cys, or NEM on gastric mucin content were examined using a newly developed biochemical method. MMSC and Cys inhibited mucosal damage due to 50% ethanol. The preinjection of NEM had no effect on cytoprotection of prostaglandins, but prevented the effects of Cys and MMSC. MMSC and Cys increased surface mucin content but lessened that of deep mucin. NEM decreased surface mucin and increased deep mucin. It thus follows that sulfhydryl compounds accelerate the secretion of deep mucin and accumulate surface mucin. The cytoprotective mechanism of MMSC may thus be mediated by sulfhydryl compounds, and the increase in surface mucosal mucin may possibly be related to cytoprotection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02208583
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    Paper (German National Licenses)
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