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  • Articles  (498)
  • Biology  (498)
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  • Articles  (498)
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  • 1
    Electronic Resource
    Electronic Resource
    Abundant males in populations of a selfing hermaphrodite fish, Rivulus marmoratus, from some Belize cays (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 40 (1992), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The killifish Rivulus marmoratus is the only known selfing hermaphroditic vertebrate, and males of the species are usually exceedingly rare or non-existent in nature. Collections on several Belize cays in 1988 and 1989 yielded 13.5–24% males. Factors responsible for this unusually high proportion of males are currently not understood. Likewise, the biological significance of males in populations which otherwise consist of selfing hermaphrodites (with internal fertilization) is problematic and awaits further study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1992.tb02576.x
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  • 2
    Electronic Resource
    Electronic Resource
    COMPLEXITY OF THE BOVINE MHC CLASS-II SPECIFICITY DW3 AS DEFINED BY ALLOANTISERA (1994)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 21 (1994), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Alloantisera related to the bovine major histocompatibility complex (MHC) class-II specificity Dw3 were investigated by cross-absorption experiments and by application of the monoclonal antibody-specific immobilization of lymphocyte antigen assay (MAILA). The absorption study revealed antibodies specific for an antigenic determinant shared by all Ds03 (Dw3)-positive animals, and several other antibody populations recognizing the locally defined specificites Ds10, Ds11 and Ds15, that are closely associated with Ds03. The results of the MAILA-assay indicate that the Ds03 specificity is probably encoded by DQ, whereas specificities Ds10 and Ds11 are more closely associated with DR molecules. The data presented here provide the first evidence that bovine DR and DQ specificities can be identified separately by serological methods using alloimmune antisera.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1994.tb00188.x
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  • 3
    Electronic Resource
    Electronic Resource
    Archaean subduction inferred from seismic images of a mantle suture in the Superior Province (1995)
    [s.l.] : Nature Publishing Group
    Nature 375 (1995), S. 670-674 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Superior Province of Canada consists of an alternating sequence of granite-greenstone belts and metasedimentary sub-provinces that decrease in age from 3,100 Myr in the north to 2,650 Myr in the south (Fig. 1). This sequence probably arose through the amalgamation of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/375670a0
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  • 4
    Electronic Resource
    Electronic Resource
    The Small Islands of Almost-Atolls. (1920)
    [s.l.] : Nature Publishing Group
    Nature 105 (1920), S. 292-293 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE familiar inductive series of fringing reefs, barrier reefs, and atolls may be further subdivided so as to contain six members: Normal fringing reefs, offshore fringing reefs, narrow-lagoon barrier reefs, broad-lagoon barrier reefs, almost-atolls, and atolls. Almost-atolls, or atoll-like ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/105292b0
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  • 5
    Electronic Resource
    Electronic Resource
    Coral Reefs of the Louisiade Archipelago (1922)
    [s.l.] : Nature Publishing Group
    Nature 110 (1922), S. 56-58 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THE Louisiade archipelago, consisting of four *medium-sized and many small islands east of New Guinea, is well represented on British Admiralty chart 2124 on a scale of about 1: 280,000; chart 1477 shows part of the archipelago in greater detail on a scale of about 1: 140,000. According to brief ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/110056a0
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  • 6
    Electronic Resource
    Electronic Resource
    Is Selenium Radio-active? (1904)
    [s.l.] : Nature Publishing Group
    Nature 70 (1904), S. 506-506 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT occurred to me recently that a possible method of deciding between the two hypotheses which have been brought forward to explain radio-activity, namely, that of atomic degradation (Rutherford and Soddy, Ramsay, &c.) and that of molecular change (Armstrong and Lowry, Proc. Roy. Soc., ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/070506a0
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  • 7
    Electronic Resource
    Electronic Resource
    Biotransformation of para-aminobenzoic acid and salicylic acid by PMN
    Amsterdam : Elsevier
    Free Radical Biology and Medicine 14 (1993), S. 27-35 
    Details
    ISSN: 0891-5849
    Keywords: Activated granulocytes ; Anti-inflammatory drugs ; Biotransformation of xenobiotics ; Free radicals ; Hydroxyl radical ; Myeloperoxidase ; Para-aminobenzoic acid ; Reactive oxygen species ; Salicylic acid
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0891-5849(93)90506-P
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  • 8
    Electronic Resource
    Electronic Resource
    Metabolism of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) in mouse liver preparations
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 125 (1984), S. 484-490 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(84)90566-7
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  • 9
    Electronic Resource
    Electronic Resource
    SEROLOGICAL AND BIOCHEMICAL DETECTION OF B-CELL ANTIGENS IN GOATS (1993)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 20 (1993), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The production of B-cell specific alloantisera by lymphocyte transfusion between class I matched, MLR positive goats is described. Furthermore, the usefulness of preceding IEF typing is demonstrated in the selection of immunization pairs. After suitable absorptions and cluster analysis the detected B-cell specific antigens were designated BeDl-BeD6. The specificity BeD3 could also be detected by two class II-specific murine anti-H2 monoclonal antibodies. IEF class II typing of 34 animals gave concordant results between the two techniques. One additional allelic variant could be detected by IEF typing. The detected products segregated in close linkage to the earlier described caprine class I antigens. One recombinant has been found in 78 offspring. The reactivity of cells in mixed lymphocyte cultures (MLC) was correlated with the compatibility of the test cells for their B-cell specific antigens. Three of the B-cell specific sera were characterized by immunoprecipitation. The precipitated antigens corresponded in molecular weight to MHC class II products as described in other species indicating that the here described caprine products are of class II nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1993.tb00143.x
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  • 10
    Electronic Resource
    Electronic Resource
    Coral reef fishes which forage in the water column (1973)
    Springer
    Helgoland marine research 24 (1973), S. 292-306 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary 1. Radiation of fishes representing many families in the tropical coral reef has repeatedly produced convergence in the specialization for “water-column foragers”. 2. This life mode is depicted by a recognizable set of morphological and behavioral characteristics. Exploitation of this niche has parallel examples in fresh water, and non-tropical habitats. 3. The distinguishing traits of this specialization, and the systematic, ecological and evolutionary features are described and discussed.
    Notes: Extrait Dans un biotope à récif de corail, des espèces étroitement liées peuvent servir d'exemple de différenciation sur le plan de l'évolution. La radiation évolutive de poissons représentant plusieurs familles du récif corallien tropical a conduit à plusieurs reprises à la formation de «fourragers dans la colonne d'eau». Ce mode de vie comporte une série de caractères morphologiques et éthologiques définis. On trouve des éxemples similaires dans l'eau douce et dans des habitats non tropicaux. Les traits distinctifs de cette spécialisation, la systématique, les caractéristiques écologiques et celles se rapportant à l'évolution sont décrits et discutés.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01609520
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