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  • 1
    Electronic Resource
    Electronic Resource
    The complete nucleotide sequence of the small-subunit ribosomal RNA coding region for the cycadZamia pumila: Phylogenetic implications (1988)
    Springer
    Journal of molecular evolution 27 (1988), S. 133-141 
    Details
    ISSN: 1432-1432
    Keywords: Cycad ; Gymnosperm ; Eukaryotic small-subunit rRNA ; Plant phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The DNA sequence of the small-subunit ribosomal RNA coding region for the cycadZamia pumila L. was determined. TheZamia smallsubunit rRNA was found to be 1813 nucleotides in length and approximately 92% identical to published angiosperm small-subunit rRNA sequences. Conserved regions interspersed with variable regions are observed corresponding to those found in other eukaryotic small-subunit sequences. Using representatives from protist, fungal, plant, and animal groups, a distance matrix was constructed of average nucleotide substitution rates for pairs of organisms. Phylogenetic trees were inferred from similarities between sequences. The sequence ofZamia represents the earliest divergence from the higher plant lineage reported to date for small-subunit rRNA data. Inferred phylogenies also support a monophyletic origin for the angiosperms consistent with studies citing phenotypic characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138373
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  • 2
    Electronic Resource
    Electronic Resource
    ON THE SUPPORT OF CONVERTS (1914)
    Oxford, UK : Blackwell Publishing Ltd
    The @Muslim world 4 (1914), S. 0 
    Details
    ISSN: 1478-1913
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Theology and Religious Studies
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1478-1913.1914.tb01383.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Waves and cold plasmas near Mars
    Amsterdam : Elsevier
    Advances in Space Research 12 (1992), S. 243-249 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(92)90336-V
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  • 4
    Electronic Resource
    Electronic Resource
    Plasma and waves around Mars
    Amsterdam : Elsevier
    Planetary and Space Science 39 (1991), S. 89-98 
    Details
    ISSN: 0032-0633
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0032-0633(91)90131-S
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Endo-1,4-β-glucanase gene expression and cell wall hydrolase activities during abscission in Valencia orange (1998)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 102 (1998), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The physiological and molecular events of ethylene-induced abscission in mature fruit calyx, laminar and floral abscission zones of cv. Valencia orange were examined. Continuous exposure of fruit explants to 5 µl 1−1 ethylene for 2 to 40 h resulted in marked increases in endo-1,4-β-glucanase (cellulase) and polygalacturonase (PG) activities in calyx abscission zones. Two abscission-related cellulases and one PG were found. The major peak of cellulase activity corresponded to a pI of 8.0 and molecular weight of 51 kDa, whereas the minor cellulase peak had a pI of 5.5. The abscission polygalacturonase had a pI of 5.5. Calyx abscission zone RNA was amplified with degenerate primers based on sequence of the purified Valencia orange calyx abscission cellulase, and cloned. The two partial cellulase cDNA clones were 59% identical at the nucleotide level. Genomic Southern analysis suggested that Valencia orange contained two groups of cellulase genes. A full-length cDNA clone from each group was isolated from a cDNA library prepared from ethylene-induced calyx abscission zone mRNA. Both genes were expressed in ethylene-induced calyx, laminar and floral abscission zones, but were not expressed in non-induced abscission zones or mature leaves treated with or without ethylene, young bark or young fruit of Valencia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.1998.1020209.x
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  • 6
    Electronic Resource
    Electronic Resource
    Genetics and expression of two pectinesterase genes in Valencia orange (1998)
    Copenhagen : Munksgaard International Publishers
    Physiologia plantarum 102 (1998), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The genetics and expression of pectinesterase (PE) genes were examined in Valencia orange. Degenerate primers based on partial amino acid sequence of a 36 kDa PE protein isolated from juice vesicles were used to amplify a 350 bp DNA fragment from cDNA prepared from juice vesicle total RNA. Two groups of 350 bp PE clones with 66% sequence identity were isolated. A clone from each group was used to screen a Valencia orange genomic DNA λ library. Two different lambda clones that contained complete PE coding sequence (CsPME1 and CsPME3) and a third lambda clone that contained partial PE sequence (CsPME2) were characterized. The CsPME1 gene contained two exons (1063 and 689 bp) interrupted by a 1452 bp intron, whereas the CsPME3 gene had two exons (844 and 686 bp) interrupted by a 771 bp intron. CsPME1 shared significant sequence similarity with the partial clone CsPME2, including the entire cloned region of the first exon, a large region in the 5′ portion of the intron and the 3′ portion of the second exon, but the 3′ portion of the intron and the 5′ portion of the second exon were dissimilar. Southern blots suggested that Valencia orange has two genes within each PE group. Full-length cDNA clones that shared 99% sequence identity with CsPME1 and CsPME3 were isolated. Both groups of PE genes were differentially expressed in tissues of Valencia orange, and in addition CsPME3 appeared to be ethylene-regulated. The deduced proteins of PE cDNA clones CsPME1 (63.5 kDa) and CsPME3 (56.3 kDa) were considerably larger than the PE protein we isolated from Valencia orange juice vesicles and also other mature plant PE proteins. The estimated size of group I (2.2 kb) and group II (2.0 kb) PE mRNAs also predicted a larger protein than was isolated from juice vesicles. Alignment of the mature tomato and mung bean PE proteins, the most N-terminal sequence we obtained from polypeptides derived from the 36 kDa PE isolated from juice vesicles and the deduced amino acid sequences of plant PE cDNA clones suggest that a post-translational cleavage event separates the variable N-terminus from the more conserved C-terminal domain of the mature PE protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1399-3054.1998.1020210.x
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  • 7
    Electronic Resource
    Electronic Resource
    Proton acceleration in flares and magnetohydrodynamic solar activity (1993)
    Springer
    Solar physics 147 (1993), S. 329-335 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The possibility of accelerated protons in solar flares having a sharp change in their spectral index is discussed. The analysis is based on the Tsytovich (1982, 1984, 1987a, b, c) acceleration model by MHD turbulence, which is shown to have different resonant conditions for non-relativistic and relativistic particles. The different resonant condition is shown to result in a sharp change in the accelerated proton spectral index, even in the absence of any peculiarity in the spectra of the MHD turbulence. Time scales for accelerated protons to relativistic energies are also derived, and shown to be consistent with observations. We also show that the threshold energy for electron acceleration by low frequency MHD turbulence is much greater than for proton acceleration. The turbulence therefore preferentially accelerates protons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690722
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  • 8
    Electronic Resource
    Electronic Resource
    Gonococci in vivo and in vitro. Further studies on the host and bacterial determinants of gonococcal resistance to killing by human serum, and by phagocytes (1987)
    Springer
    Antonie van Leeuwenhoek 53 (1987), S. 551-555 
    Details
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A small M, heat and acid labile, host inducer(s) of gonococcal resistance to complement mediated killing by fresh human serum (-FHS), being purified from red blood cell (RBC) extracts, produced changed in lipopolysaccharide (LPS) structure, surface antigens and proteins; and acquirement of resistance related to loss of a target antigen for bactericidal IgM, possibly LPS components. A 20 kDalt, lipoprotein with a high content of glutamic acid isolated from outer membranes of a gonococcal strain selected in vivo is a determinant of gonococcal resistance to killing by human phagocytes. Somic extracts of gonococci may contain a cytotoxin for human phagocytes. At the 4th International Pathogenic Neisseriae Conference, we reported (Parsons et al. 1985) that conditions in vivo induced phenotypic change leading to gonococcal resistance to complement-mediated killing by human serum; and, also, selected gonococcal types which showed a greater resistance to intracellular killing by human phagocytes than laboratory strains. Furthermore, evidence was presented that not only was resistance to complement mediated killing important in gonococcal pathogenesis, but also resistance to phagocytic defences. This paper describes the continuance of our studies on the determinants of induced serum resistance and of resistance to killing by phagocytes including toxicity to these cells. Each section begins by summarising previous work that was referenced in Parsons et al. (1985).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00415516
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