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  • Springer  (28)
  • American Society of Hematology  (2)
  • 1975-1979  (17)
  • 1955-1959  (13)
  • 1
    Digitale Medien
    Digitale Medien
    Artificial membrane for in vitro feeding of piercing-sucking arthropods (1979)
    Springer
    Entomologia experimentalis et applicata 25 (1979), S. 117-119 
    Details
    ISSN: 1570-7458
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00421827
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Dissections of a triangular prism (1975)
    Springer
    Geometriae dedicata 4 (1975), S. 279-289 
    Details
    ISSN: 1572-9168
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Notizen: Abstract Three parallel, non-planar lines ξ, η, and ζ are given in ordinary 3-space, and distinct points X 1, X 2, ..., X x are given on ξ, Y 1, Y 2, ..., Y y on η, and Z 1, Z 2, ..., Z z on ζ. Into at most how many cells do the xyz triangular plane segments X i Y j Z k divide the interior of the triangular prism determined by the lines ξ, η, and ζ? We employ an ingenious method due to Alfred Brousseau to solve this problem of classical combinatorial geometry.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00148762
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Seltene Metallverbindungen in Sedimenten (1955)
    Springer
    International journal of earth sciences 43 (1955), S. 464-469 
    Details
    ISSN: 1437-3262
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Zusammenfassung An 2 Beispielen (Zinnober und Baryt) wird erörtert, wie es in Sedimenten zur mehr oder weniger frühzeitigen Ausscheidung von relativ seltenen Metallverbindungen kommt unter bemerkenswerter Konzentrationswanderung. In vielen, aber nicht in allen Fällen erscheint als Vorbedingung der Mineralbildung die Gegenwart von Hohlräumen im Sediment. Die Gegenwart organischer Materie scheint wenigstens in einem Teil der Fälle die Konzentrationswanderung zu begünstigen.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01764032
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Aminoacyl-tRNA synthetase families and their significance to the origin of the genetic code (1978)
    Springer
    Origins of life and evolution of the biospheres 9 (1978), S. 39-50 
    Details
    ISSN: 1573-0875
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Geologie und Paläontologie
    Notizen: Abstract A correlation of various aspects of the protein structures and substrate and mechanistic specificities of the aminoacyl-tRNA synthetases has led to the identification of at least one family of enzymes probably derived from a common ancestral synthetase. While strong correlations exist only in one part of the array of 64 codons comprising the Genetic Code, this itself may be interpreted as a meaningful pattern, most consistent with a development of the present code from earlier codes containing fewer amino acids and fewer available codons. Specifically, strong correlations in the enzymes whose cognate tRNAs respond to codons containing a central pyrimidine, including the enzyme family of Ile-, Phe-, Val-, Met-, and Leu-tRNA synthetases, suggests that these enzymes evolved last, and that, therefore, an earlier version of the Genetic Code was comprised solely of codons containing a central purine. It is suggested that further study of the historical interrelationships of these enzymes could lead to a fairly detailed picture of how the Genetic Code developed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00929712
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Buchbesprechungen (1958)
    Springer
    Theoretical and applied genetics 28 (1958), S. 189-192 
    Details
    ISSN: 1432-2242
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00840116
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Photolithotrophy, photoheterotrophy, and chemoheterotrophy: Patterns of resource utilization on an annual and a diurnal basis within a pelagic microbial community (1979)
    Springer
    Microbial ecology 5 (1979), S. 1-15 
    Details
    ISSN: 1432-184X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract An annual investigation of rates of photolithotrophy, photoheterotrophy, and chemoheterotrophy utilizing glucose and bicarbonate was made within the pelagic zone of a small, hardwater, southwestern Michigan lake. Sampling proceeded on a monthly, diurnal, and depth-wise basis. Annual mean photoheterotrophic uptake was estimated at 2.6μg C m−3h−1. Two periods of relatively high activity were observed: one during spring overturn and the second during the late summer period. In general, greatest contributions to overall carbon cycling occurred during morning to midday incubation periods and at intermediate depths within the water column. Rates of chemoheterotrophy averaged 6.9μg C m−3h−1 and were relatively uniform throughout the annual period. Greatest overall chemoheterotrophic activity was associated with periods of overturn. In general, this activity increased throughout the day and with increasing depth within the water column. The annual mean for photolithotrophic fixation was 1.33 mg C m−3h−1. Greatest contributions to rates of photosynthesis were associated with epilimnetic waters during early morning and midday incubations. Relatively minor contributions to inorganic fixation were made by waters below the 6-meter contour. Spring overturn and late summer represented periods of particularly great photolithotrophic activity. Quantitative comparisons among carbon pathways indicate that rates of pelagic heterotrophy, both photo- and chemoheterotrophy combined, contribute small quantities of carbon to overall carbon metabolism in this oligotrophic system. Qualitative comparisons among pathways indicate strong spatial and temporal separation. The late summer period showed greatest seasonal separation of the three pathways. Spring values represented a period of relatively high activity for all three pathways. On a depth-wise basis, photolithotrophic activity was greatest near the surface and chemolithotrophic activity greatest near the bottom. Photoheterotrophy took an intermediate position between the two. Diurnally, photoheterotrophy and photolithotrophy showed greatest activity during midday and early morning periods, whereas chemoheterotrophy increased throughout the daylight period and reached maximal values in sunset incubations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02010573
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Der Einfluß peroraler Säuregaben auf die Blutbefunde bei der weißen Ratte (1958)
    Springer
    Naturwissenschaften 45 (1958), S. 341-341 
    Details
    ISSN: 1432-1904
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00640232
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Book reviews (1979)
    Springer
    Theoretical and applied genetics 55 (1979), S. 256-256 
    Details
    ISSN: 1432-2242
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00265361
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Identification and nucleotide sequence of the sup8-e UGA-suppressor leucine tRNA from Schizosaccharomyces pombe (1979)
    Springer
    Molecular genetics and genomics 172 (1979), S. 221-228 
    Details
    ISSN: 1617-4623
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Using the translation of rabbit globin mRNA in wheat germ extracts as an assay for ochre and opal suppression, a UGA suppressor tRNA from Schizosaccharomyces pombe strain sup8-e was purified by column chromatography and two-dimensional gel electrophoresis. The purified tRNA can be aminoacylated with leucine by a crude aminoacyl-tRNA synthetase preparation from a wild type S. pombe strain, and has high activity in the suppressor assay. By a combination of post-labeling fingerprinting and rapid gel sequencing methods the nucleotide sequence of this suppressor tRNA was determined to be: pG-C-G-G-C-U-A-U-G-C-C-ac4C-G-A-G-D-G-D-G-D-A-A-G-G-G-m 2 2 G-G-C-A-G-A-Ψ-U-U*-C-A-m1G-C-C-C-U-G-C-U-G-U-U-G-U-A-A-A-A-C-G-m5C-G-A-G-A-G-T-Ψ-C-G-m1A-A-C-C-U-C-U-C-U-G-G-C-C-G-C-A-C-C-AOH. The anticodon sequence U*CA is complementary to the UGA codon. An interesting feature of the suppressor tRNA is an expanded anticodon loop of nine nucleotides owing to an A-C nonpair at the first anticodon stem position.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00268286
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Buchbesprechungen (1976)
    Springer
    Metrika 23 (1976), S. 123-126 
    Details
    ISSN: 1435-926X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01902856
    Standort Signatur Erwartet Verfügbarkeit
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