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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 368 (1994), S. 285-286 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DNA "fingerprinting" was widely hailed as the greatest breakthrough in forensic science this century. Its ability to "estab-lish guilt or innocence" captured the attention and enthusiasm of police, politi-cians, the legal establishment and the general public. Not for the first time, initial ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of mathematical biology 22 (1985), S. 21-29 
    ISSN: 1432-1416
    Keywords: Wright-Fisher model ; selective advantage ; ultimate homozygosity ; martingale methods ; coupling techniques ; fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract The Wright-Fisher model is considered in the case where the population size is random and the magnitude of the selective advantage of one of the alleles varies with time. The central question addressed is the possibility of ultimate genetic polymorphism. Partial results are obtained in the general case and complete results in the case where the population size and selective advantage are not density dependent. Bounds on the fixation probability are obtained when the selective advantage is constant.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of mathematical biology 23 (1985), S. 103-118 
    ISSN: 1432-1416
    Keywords: Dual processes ; Lines of descent ; Diffusion approximations ; Exchangeability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract By means of a representation as interactive particle systems, dual processes are constructed for a large class of exchangeable models in population genetics. It is shown that as the population size becomes large these dual processes tend in distribution to a particularly tractable limiting dual process. Properties of the models are analyzed using the duality relationship and approximate expressions are obtained for various quantities. Diffusion approximations follow easily from the invariance result.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of mathematical biology 25 (1987), S. 381-391 
    ISSN: 1432-1416
    Keywords: Coalescent ; K-allele diffusions ; Population genealogy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A process analogous to Kingman's coalescent is introduced to describe the genealogy of populations evolving according to the infinitelymany neutral alleles model. The process records population frequencies in old and new classes, and labels the new classes in order of decreasing age. Its marginal distribution is characterized in a form which is amenable to explicit calculations and the transition densities of the associated K-allele models follow readily from this representation.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2277
    Keywords: Age difference, donor-recipient ; Donor-recipient age difference
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Whilst HLA matching is routine in renal transplantation the possible benefits of matching donor to recipient age have not been previously explored. The simultaneous effect on graft survival of donor and recipient age was therefore investigated for 274 consecutive first cadaver transplant recipients treated by cyclosporin immunosuppression in two centres. The overall graft survival was 77%, and was not significantly different between the two centres. Individually there was no significant effect of donor or recipient age but taken together, the difference in age significantly affected graft survival (P〈0.01) regard-less of the mode of failure. The 1-year graft survival for all failures was 66.2% when the donor was 5 or more years older, 84.5% when the donor was 5 or more years younger and 71.7% when the donor was within 5 years of the recipient's age. Multivariate analysis, taking into account other variables (HLA matching, dialysis time and type, donor/recipient sex, local/imported kidneys, sensitivity, operation time, total ischaemic time, pre-operative transfusions) indicated that age difference was the single most important variable (P〈0.01). The only other important covariate risk factor in improving graft survival was HLA-DR matching (P〈0.05). Donor-recipient age difference is a potentially important recipient selection criterion in cyclosporin-treated renal transplant patients.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Qualitative sociology 17 (1994), S. 215-241 
    ISSN: 1573-7837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Sociology
    Notes: Abstract Trust is not normally an issue in modern sport because of the institutionalized requirements for verification of achievements. However, in the two ‘sports’ discussed here, certain records and claimed achievements may be taken on trust. The circumstances under which trust becomes an issue, the processes by which it is tested, and the manner in which it is employed to ensure the integrity of the mountaineering and birding subcultures are explored in this paper.
    Type of Medium: Electronic Resource
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