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  • Springer  (16)
  • American Association for the Advancement of Science  (2)
  • 2000-2004  (13)
  • 1970-1974  (4)
  • 1935-1939  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Horizontal Transfer of Archaeal Genes into the Deinococcaceae: Detection by Molecular and Computer-Based Approaches (2000)
    Springer
    Journal of molecular evolution 51 (2000), S. 587-599 
    Details
    ISSN: 1432-1432
    Keywords: Key words: Horizontal gene transfer — BLAST comparison — Genomes —Deinococcus—Thermus—Meiothermus— A/V-ATPase — Prolyl-tRNA synthetase — Biotin carboxylase — Enolase — Bioinformatics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. Members of the Deinococcaceae (e.g., Thermus, Meiothermus, Deinococcus) contain A/V-ATPases typically found in Archaea or Eukaryotes which were probably acquired by horizontal gene transfer. Two methods were used to quantify the extent to which archaeal or eukaryotic genes have been acquired by this lineage. Screening of a Meiothermus ruber library with probes made against Thermoplasma acidophilum DNA yielded a number of clones which hybridized more strongly than background. One of these contained the prolyl tRNA synthetase (RS) gene. Phylogenetic analysis shows the M. ruber and D. radiodurans prolyl RS to be more closely related to archaeal and eukaryal forms of this gene than to the typical bacterial type. Using a bioinformatics approach, putative open reading frames (ORFs) from the prerelease version of the D. radiodurans genome were screened for genes more closely related to archaeal or eukaryotic genes. Putative ORFs were searched against representative genomes from each of the three domains using automated BLAST. ORFs showing the highest matches against archaeal and eukaryotic genes were collected and ranked. Among the top-ranked hits were the A/V-ATPase catalytic and noncatalytic subunits and the prolyl RS genes. Using phylogenetic methods, ORFs were analyzed and trees assessed for evidence of horizontal gene transfer. Of the 45 genes examined, 20 showed topologies in which D. radiodurans homologues clearly group with eukaryotic or archaeal homologues, and 17 additional trees were found to show probable evidence of horizontal gene transfer. Compared to the total number of ORFs in the genome, those that can be identified as having been acquired from Archaea or Eukaryotes are relatively few (approximately 1%), suggesting that interdomain transfer is rare.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002390010122
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  • 2
    Electronic Resource
    Electronic Resource
    The search for common anthropogenic impacts on biodiversity: a global network (2000)
    Springer
    Journal of insect conservation 4 (2000), S. 3-9 
    Details
    ISSN: 1572-9753
    Keywords: global trends ; Carabidae ; bioindicators ; urban-rural gradients ; pitfall traps
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract We introduce an initiative to assess and compare landscape changes related to human activities on a global scale, using a single group of invertebrates. The GLOBENET programme uses common field methodology (pitfall trapping), to appraise assemblages of ground beetles (Coleoptera, Carabidae) in visually-similar land-mosaics (urban-rural gradients). Carabids were selected as the focal taxon as they are sufficiently varied (both taxonomically and ecologically), abundant and sensitive to the environment. However, work on other taxa is comparable with the GLOBENET framework. The continuum of decreasing human pressure from city centres into the surrounding countryside was selected to represent human-caused disturbance for this initial stage of GLOBENET because these gradients can be found virtually all over the world. Through the broad-scale assessment envisioned in the GLOBENET programme, we seek to separate general, repeated effects on biodiversity from those that depend on local environments or particular biotic assemblages. Based on this understanding we aim to develop simple tools and protocols for assessing ecological effects of human-caused landscape changes, which could help to sustainably manage landscapes for biodiversity and for human requirements. For instance, the response of different functional groups of carabids to these landscape changes may help guide management practices. Further GLOBENET developments and information are available at our website: http://www.helsinki.fi/science/globenet/
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009655127440
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  • 3
    Electronic Resource
    Electronic Resource
    How Useful are Ant Assemblages for Monitoring Habitat Disturbance on Grasslands in South Eastern Australia? (2000)
    Springer
    Journal of insect conservation 4 (2000), S. 153-159 
    Details
    ISSN: 1572-9753
    Keywords: indicators ; remnant habitats ; environmental surveys ; functional groups
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract Native grasslands are one of the most endangered ecosystems in south eastern Australia. Conservation of grassland remnants and development of effective indicator groups to monitor their quality is a high priority. Recent surveys of epigaeic invertebrates have revealed several candidate groups for this. Ants are a popular focal group for invertebrate surveys in the region. The ant species richness and functional groups on four series of grassland sites in Victoria suggest that small scale heterogeneity is sufficiently high that the predictive indicator values of ants are limited, and that ants may not be sufficiently sensitive to floristic change to employ them alone in monitoring grassland condition in the region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009668817271
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  • 4
    Electronic Resource
    Electronic Resource
    The Stability of Magnetic VorticesRID="*"ID="*"Research on this paper was supported by NSERC under grant N7901 (2000)
    Springer
    Communications in mathematical physics 212 (2000), S. 257-275 
    Details
    ISSN: 1432-0916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Notes: Abstract: We study the linearized stability of n-vortex (n∈ℤ) solutions of the magnetic Ginzburg–Landau (or Abelian Higgs) equations. We prove that the fundamental vortices (n = ± 1) are stable for all values of the coupling constant, λ, and we prove that the higher-degree vortices (|n|≥ 2) are stable for λ 〈 1, and unstable for λ 〉 1. This resolves a long-standing conjecture (see, eg, [JT]).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00005526
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  • 5
    Electronic Resource
    Electronic Resource
    Species- and Age-Related Differences in Susceptibility to Pesticide Exposure for Two Amphibians, Rana pipiens, and Bufo americanus (2000)
    Springer
    Bulletin of environmental contamination and toxicology 64 (2000), S. 263-270 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001289910039
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  • 6
    Electronic Resource
    Electronic Resource
    Reproductive parameters of the Taiwan monkey (Macaca cyclopis) (1973)
    Springer
    Primates 14 (1973), S. 201-213 
    Details
    ISSN: 0032-8332
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The following parameters of the Taiwan monkey,Macaca cyclopis, are presented and compared with other species ofMacaca: the menstrual cycle, sexual skin and vaginal desquamation changes during the menstrual cycle, time of ovulation, gestation period, breeding season, body weight of the newborn, age and body weight at menarche, body weight at first conception, spermatozoa count in the ejaculate, and the body weight at sexual maturity of the male. The many similarities in reproductive biology ofMacaca cyclopis, the rhesus monkey (Macaca mulatta), and the cynomolgus monkey (Macaca irus) include sexual skin and vaginal desquamation changes during the menstrual cycle, time of ovulation, gestation period, and placental sign. Body weight ofM. cyclopis is lower thanM. mulatta at birth, at menarche and at the first conception in females and at sexual maturation in males, is heavier thanM. irus at birth and is not different fromM. radiata at birth. No difference in menstrual cycle ofM. cyclopis was observed in animals housed in air-conditioned rooms compared to those housed in nonair-conditioned rooms. Summer amenorrhea was not observed inM. cyclopis but a high incidence of low vaginal desquamation was noted to occur in summer months. The mode of length of the menstrual cycle ofM. cyclopis is shorter thanM. mulatta and other species ofMacaca. The breeding season ofM. cyclopis in the wild extends from the end of September to January. In laboratory conditions their fertile period extends throughout the year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01730820
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  • 7
    Electronic Resource
    Electronic Resource
    Intermediary carbohydrate metabolism (1938)
    Springer
    Reviews of physiology, biochemistry and pharmacology 40 (1938), S. 164-203 
    Details
    ISSN: 1617-5786
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02320795
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  • 8
    Electronic Resource
    Electronic Resource
    Representing uncertainty in climate change scenarios: a Monte-Carlo approach (2000)
    Springer
    Integrated assessment 1 (2000), S. 203-213 
    Details
    ISSN: 1573-1545
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Climate change impact assessment is subject to a range of uncertainties due to both incomplete and unknowable knowledge. This paper presents an approach to quantifying some of these uncertainties within a probabilistic framework. A hierarchical impact model is developed that addresses uncertainty about future greenhouse gas emissions, the climate sensitivity, and limitations and unpredictability in general circulation models. The hierarchical model is used in Bayesian Monte-Carlo simulations to define posterior probability distributions for changes in seasonal-mean temperature and precipitation over the United Kingdom that are conditional on prior distributions for the model parameters. The application of this approach to an impact model is demonstrated using a hydrological example.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019144202120
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  • 9
    Electronic Resource
    Electronic Resource
    The Australian species ofMymar Curtis described by A. A.Girault [Hymenoptera, Mymaridae] (1973)
    Springer
    BioControl 18 (1973), S. 119-123 
    Details
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé Les types des deux espèces australiennes deMymar décrites parGirault (1912) sont figurés et redécrits, et des exemplaires du Victoria sont attribués àM. schwanni Girault.M. tyndalli est confirmée comme synonyme deM. taprobanicum Ward, maisM. schwanni est distincte deM. pulchellum et paraît une bonne espèce.
    Notes: Abstract Augmented descriptions are given of the holotypes ofMymar schwanni Girault andM. tyndalli Girault,M. schwanni is maintained as a distinct species, to which further Australian material is assigned, andM. tyndalli confirmed as a synonym ofM. taprobanicum Ward.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02372024
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  • 10
    Electronic Resource
    Electronic Resource
    The relationships of the genusAustralomymar [Hymenoptera: Mymaridae] (1974)
    Springer
    BioControl 19 (1974), S. 229-235 
    Details
    ISSN: 1573-8248
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé L'holotype femelle unique deAustralomymar aurigerim Girault est décrit et figuré. Il est comparé avee, cinq espèces dePolynemoidea Girault. Ces deux enres sont maintenus et vraisemblablement sont affiliés àSelenaeus Waterhouse et àPolynema Haliday.
    Notes: Abstract The holotype female ofAustralomymar aurigerum Girault is redescribed and figured. Comparative data on the types of the five described species ofPolynemoidea Girault are given, and the affinities of both genera briefly discussed. They are maintained as distinct genera, probably related toSelenaeus Waterhouse and elements of the large genusPolynema Haliday,s. l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02371047
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