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  • Articles  (273)
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  • 1
    Electronic Resource
    Electronic Resource
    C4O and C6O molecules (1988)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 110 (1988), S. 609-610 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00210a055
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  • 2
    Electronic Resource
    Electronic Resource
    Requirement of S. pombe exonuclease II, a homologue of S. cerevisiae Sep1, for normal mitotic growth and viability (1996)
    Springer
    Current genetics 30 (1996), S. 284-293 
    Details
    ISSN: 1432-0983
    Keywords: Key words Cold sensitivity ; Exonuclease II ; Microtubule inhibitors ; Strand-exchange protein Sep1
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Exonuclease II (ExoII) from Schizosaccharomyces pombe is a 5′→3′ single-stranded DNA exonuclease. We have cloned its gene, exo2, whose nucleotide sequence revealed that ExoII is a homologue of the multifunctional Saccharomyces cerevisiae Sep1 protein (also called Kem1, Xrn1, Rar5, Dst2). S. pombe exo2 null mutants were cold-sensitive for growth, had increased cell size at the restrictive temperature, were hypersensitive to the mitotic inhibitor thiabendazol and to caffeine, and died rapidly in stationary phase. Many of these phenotypes are similar to those of sep1 (kem1 or xrn1) mutants of S. cerevisiae. In contrast, the exo2 mutation had only a moderate effect on progression through meiosis and no significant effect on meiotic recombination. We discuss possible functions of the multifunctional ExoII protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940050134
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  • 3
    Electronic Resource
    Electronic Resource
    Mechanism and Control of Homologous Recombination in Escherichia Coli (1987)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 21 (1987), S. 179-201 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.21.120187.001143
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  • 4
    Electronic Resource
    Electronic Resource
    Late Cenozoic Freshwater Fishes of North America (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Ecology, Evolution, and Systematics 12 (1981), S. 163-193 
    Details
    ISSN: 0066-4162
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.es.12.110181.001115
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  • 5
    Electronic Resource
    Electronic Resource
    Sensitive and specific detection of Clavibacter xyli subsp. xyli, causal agent of ratoon stunting disease of sugarcane, with a polymerase chain reaction-based assay (1998)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Plant pathology 47 (1998), S. 0 
    Details
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: A sensitive, specific polymerase chain reaction-based assay was developed for the detection of the causal agent of ratoon stunting disease of sugarcane, Clavibacter xyli subsp. xyli. This assay uses oligonucleotide primers derived from the internal transcribed spacer region between the 16S and 23S rRNA genes of the bacterial rRNA operon. The assay is specific for C. xyli subsp. xyli and does not produce an amplification product from the template of the closely related bacterium C. xyli subsp. cynodontis, nor from other bacterial species. The assay was successfully applied to the detection of C. xyli subsp. xyli in fibrovascular fluid extracted from sugarcane and was sensitive to approximately 22 cells per PCR assay. A multiplex PCR test was also developed which identified and differentiated C. xyli subsp. xyli and C. xyli subsp. cynodontis in a single PCR assay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3059.1998.00255.x
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  • 6
    Electronic Resource
    Electronic Resource
    Simulation of experimentally achieved DIII-D detached plasmas using the UEDGE code (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 1967-1975 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The introduction of a divertor Thomson scattering system in DIII-D [J. Luxon et al., International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1986), p. 159] has enabled accurate determination of the plasma properties in the divertor region. Two plasma regimes are identified: detached and attached. The electron temperature in the detached regime is about 2 eV, much lower than 5–10 eV determined earlier. Fluid models of the DIII-D scrape-off layer plasma successfully reproduce many of the features of these two regimes, including the boundaries for transition between them. Detailed comparison between the results obtained from the fluid models and experiment suggest the models underestimate the spatial extent of the low-temperature region associated with the detached plasma mode. Low-temperature atomic physics processes that are not included in the present models may account for this discrepancy. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871993
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  • 7
    Electronic Resource
    Electronic Resource
    The effects of fish on assemblages of amphibians in ponds: a field experiment (1999)
    Oxford, UK : Blackwell Science, Ltd
    Freshwater biology 41 (1999), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. Bluegill sunfish (Lepomis macrochirus) dominate fish assemblages of small lakes and ponds throughout the eastern United States and may play a major role in structuring aquatic communities. We examined the impact of adult bluegill on amphibian density by stocking bluegill at a range of densities into partitions of an experimental pond in which amphibians were free to colonize.2. Adult bluegill had a major impact on the amphibian assemblage. By the end of the experiment, gray treefrog (Hyla versicolor) tadpoles were nine times less abundant, and red-spotted newt (Notophthalmus viridescens) adults were three times less abundant in the presence of adult bluegill than in their absence. In contrast, bullfrog (Rana catesbeiana) tadpoles tended to increase in the presence of adult bluegill. Adult bluegill also had a negative effect on the abundance of predaceous aquatic insects.3. There was no indication that interactions among amphibians were significant in determining the above patterns. We suggest that the strong impact of adult bluegill resulted from a combination of direct and indirect effects on amphibian larvae and predaceous aquatic insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.1999.00445.x
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  • 8
    Electronic Resource
    Electronic Resource
    Hotspots of homologous recombination (1994)
    Springer
    Cellular and molecular life sciences 50 (1994), S. 234-241 
    Details
    ISSN: 1420-9071
    Keywords: Homologous recombination ; hotspots ; nucleases ; meiosis ; Escherichia coli ; Chi ; Schizosaccharomyces pombe ; M26
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Homologous recombination occurs at higher than average frequency at and near hotspots. Hotspots are special nucleotide sequences recognized by proteins that promote, directly or indirectly, a rate limiting step of recombination. This review focuses on two well-studied examples, the Chi sites of the bacteriumEscherichia coli and the M26 site of the fission yeastSchizosaccharomyces pombe. Chi, 5′ G-C-T-G-G-T-G-G 3′, is recognized by the RecBCD enzyme, which nicks the DNA near Chi and produces a 3′-ended single-stranded DNA ‘tail’; this tail is a potent substrate for homologous pairing by RecA and single-stranded DNA binding proteins. M26, 5′ A-T-G-A-C-G-T 3′, is recognized by a heterodimeric protein and stimulates, by an as-yet-unknown mechanism, meiotic recombination at and near theade6 gene. Additional hotspots in bacteria, fungi, and mammals enhance recombination directly or indirectly via a variety of mechanisms. Although hotspots are widespread among organisms, the biological role of their localized enhancement of recombination remains a matter of speculation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924006
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  • 9
    Electronic Resource
    Electronic Resource
    Positive pion absorption on deuterium at energies above the 3,3 resonance (1983)
    Springer
    The European physical journal 313 (1983), S. 105-110 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of the differential cross section for positive pion absorption on the deuteron have been measured at 170, 208 and 285 MeV. The data have been fitted with Legendre polynomials. Along with other recent experiments, these data are compared with recent theoretical descriptions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02115848
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  • 10
    Electronic Resource
    Electronic Resource
    Redesigning sugarcane for resistance to Australian canegrubs: a potential IPM component (1996)
    Springer
    Integrated pest management reviews 1 (1996), S. 79-90 
    Details
    ISSN: 1572-9745
    Keywords: sugarcane ; host-plant resistance ; whitegrubs ; canegrubs ; Scarabaeidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Current management options to minimize the impact of canegrubs (larvae of melolonthine scarabs) on Australian sugarcane are heavily dependent on the use of synthetic insecticides. In developing a successful integrated pest management (IPM) programme for canegrubs, control options must be broadened. Plant resistance offers the potential for an easily deliverable and environmentally acceptable management option. Previous anecdotal reports suggest that Australian cultivars vary in their resistance to canegrubs. Many sugarcane clones (Saccharum spp. complex hybrids) have been screened and our studies have shown that there is variability in resistance through the reduction of the amount of tops, roots and stubble and in their effects on canegrub development and survival. Proteinase inhibitors, lectins and avidin have been identified as having activity against Australian canegrubs and are being introduced into the sugarcane genome. Toxins from Bacillus thuringiensis have shown little potential and are not being used further. We present a rationale for using resistant plants as a control option and for the incorporation of plant resistance into the breeding programme. Projected research will screen more sugarcane clones for resistance, study the nature of inheritance, identify chemical mechanisms involved in antibiotic effects, screen further antimetabolites for possible incorporation into the genome, prove the potential resistance of genetically engineered plants and incorporate plant resistance into an IPM programme for canegrubs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00142826
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