Search Results - (Author, Cooperation:L. Karim)

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  1. 1
    Staff View
    Publication Date:
    2012-02-03
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    Alleles ; Animals ; Cattle/classification/*genetics ; Chromosome Mapping ; Chromosomes, Mammalian/*genetics ; DNA Copy Number Variations/genetics ; Gene Duplication/genetics ; Gene Fusion/genetics ; Genome-Wide Association Study ; Genotype ; Hair Color/*genetics ; In Situ Hybridization, Fluorescence ; Phenotype ; Polymorphism, Single Nucleotide/genetics ; Translocation, Genetic/*genetics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    ISSN:
    1572-946X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Whereas data for the extinction of starlight in the visible show the interstellar grains must be partially hollow, data in the ultraviolet show the vesicular interiors must be irregular. In particular, the absorbing materials responsible for excess extinction over a band centred at ∼2175 Å are required to be concentrated in irregularly distributed chromophores with dimensions of the order of or less than one-tenth of the whole grain. The laboratory measurements of absorptions produced by microorganisms agree very closely with astronomical observations for a large number of early-type stars. Since the interior structures of microorganisms are indeed highly irregular, the laboratory measurements made with microorganisms suspended in a fluid, can reasonably be transferred to microorganismsin vacuo. The characteristic dimension for the scattering of visible light by rod-like grains has in the past been taken to be rod diameters. An alternate interpretation with the characteristic dimension taken instead to be rod-oengths may turn out to have advantages in respect of data in the ultraviolet, as well as agreeing in scale with bacteria-like objects found in meteorites, and possibly also, in particles entering the Earth's atmosphere from the zodiacal cloud.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  4. 4
    Karim, L. M. ; Hoyle, F. ; Wickramasinghe, N. C.
    Springer
    Published 1983
    Staff View
    ISSN:
    1572-946X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract The discovery of a broad interstellar absorption feature centred on λ2800 Å in the extinction curve of starlight confirms the presence of proteinaceous material in grains.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Karim, L. M. ; Hoyle, F. ; Wickramasinghe, N. C.
    Springer
    Published 1984
    Staff View
    ISSN:
    1572-946X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We answer our critics and confirm the reality of a feature in the interstellar extinction curve near λ 2800 Å for stars showing abnormally low graphite absorption.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses