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  • 1
    Electronic Resource
    Electronic Resource
    Microchromosomes in holocephalian, chondrostean and holostean fishes (1969)
    Springer
    Chromosoma 26 (1969), S. 35-40 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chondrostean and holostean fish of today are leftover relics: they share some characteristics with the venturesome crossopterygian fish, which launched the evolution of terrestrial vertebrates about 280 million years ago. The chromosome complements and DNA values of one chondrostean and two holostean species as well as one holocephalian species were studied. Their DNA values varied from 37% to 50% of that of mammals, and three of the species contained dot-like microchromosomes in their diploid complements. Their genome size and karyological characteristics are quite similar to those possessed by one group of reptiles and by avian species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319498
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of ambient gas on formation process of Si nanoparticles by laser ablation (1999)
    Springer
    Applied physics 69 (1999), S. S239 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 42.62.Fi; 61.46.+w; 81.15.Fg
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. We described the influence of a type of gas and its pressure upon the size distribution of Si nanoparticles fabricated by laser ablation in an ambient gas and the plume dynamics during the synthesis. The plume dynamics was investigated by laser-induced fluorescence and ultraviolet Rayleigh scattering. Based on the results, the importance of the gas flow within the ablation plume in the formation of the nanoparticles is understood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003399900224
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Developmental genetics of the alcohol dehydrogenase locus of the Japanese quail (1969)
    Springer
    Biochemical genetics 2 (1969), S. 361-369 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract In Japanese quail ♀ × chicken ♂ hybrids, the preferential transcription and translation of a maternally derived quail allele appeared to occur at the autosomally inherited liver alcohol dehydrogenase (ADH) locus. In these hybrids, the product of a paternally derived chicken allele was not detectable until 3 days after the hatching (Castro-Sierra and Ohno, 1968). The present study was designed to answer the following two questions: (1) Exactly when and where in development does ADH first appear? (2) Does the appearance of the maternal gene product precede that of the paternal ADH in development of intraspecific heterozygotes as well? B and C electrophoretic variants of ADH of the Japanese quail were utilized. Developmental sequence was established. Whole embryo extracts of earlier developmental stages showed no ADH activity. At the 9th day of incubation, ADH activity was detected for the first time in newly organized liver. Until the time of hatching, no other tissue showed ADH activity. A few days after the hatching, ADH activity appeared in the kidney. Thus, the transcriptional activity by the ADH locus of Japanese quail appears highly tissue-specific. Four hundred and seven progeny resulting from 9 breeding pairs of the 5 heterozygote-producing mating types were analyzed at the 9th day (−8 days) of incubation and at the day of hatching (day 0) for their ADH phenotypes. It is concluded that so far as B/C heterozygotes of Japanese quail are concerned, the synchronous appearance of both parental gene products is a rule at this locus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01458496
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    Paper (German National Licenses)
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