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  • Springer  (8,725)
  • National Academy of Sciences  (889)
  • Springer Nature  (654)
  • Annual Reviews  (246)
  • Springer Science + Business Media
  • 1980-1984  (10,514)
  • 1981  (5,419)
  • 1980  (5,095)
  • 11
    Electronic Resource
    Electronic Resource
    Directed Mutagenesis (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Genetics 15 (1981), S. 265-294 
    Details
    ISSN: 0066-4197
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ge.15.120181.001405
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  • 12
    Electronic Resource
    Electronic Resource
    The Actions and Metabolic Fate of Disulfiram (1981)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Pharmacology 21 (1981), S. 575-596 
    Details
    ISSN: 0362-1642
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pa.21.040181.003043
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  • 13
    Electronic Resource
    Electronic Resource
    A comparison of the rainfall climate of eleven places in West Africa using a two-part model for daily rainfall (1981)
    Springer
    Meteorology and atmospheric physics 29 (1981), S. 137-155 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Die Arbeit bringt eine Zusammenfassung der mit einem zweiteiligen Modell des täglichen Niederschlags zum Vergleich des Regenklimas von 11 Orten in einem Nord-Süd-Schnitt durch Westafrika erhaltenen Ergebnisse. Die Zahl der Regentage wurde gesondert von den Regenmengen analysiert. Es wurden Kurven der Wahrscheinlichkeit von Regen angepaßt; diese Kurven sind geographisch vereinbar. Die mittlere Länge der Trockenperioden und der Feuchteperioden variiert systematisch im Jahresgang. In der Regenzeit besteht ein nahezu konstantes mittleres Intervall von 4 Tagen zwischen dem Beginn aufeinanderfolgender Regenperioden. Regenmengen werden durch Gamma-Verteilungen beschrieben. Die mittlere Regenmenge pro Regentag ist verhältnismäßig konstant und die Änderung der Regenwahrscheinlichkeit ist daher die bedeutendste Komponente der jahreszeitlichen Änderung und der Differenzen zwischen den Orten.
    Notes: Summary This paper uses the concise summary obtained from a two part model of daily rainfall to compare the rainfall climate of eleven places on a north-south transect in West Africa. The number of rainy days is analysed separately from the amounts of rain. Curves are fitted to the probability of rain and these curves are geographically consistent. The mean length of dry spells and of wet spells vary systematically during the year. In the rainy season there is a nearly constant mean interval of about 4 days between the start of successive rainy spells. The amounts of rain are described by gamma distributions. The mean rainfall per rainy day is relatively constant and variation in the probability of rain is therefore the most important component of seasonal variation and of differences between places.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278197
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  • 14
    Electronic Resource
    Electronic Resource
    The benthic biological conditions of Los Angeles-Long Beach Harbors: Results of 28 years of investigations and monitoring (1980)
    Springer
    Helgoland marine research 34 (1980), S. 193-205 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Los Angeles-Long Beach Harbors were a grossly polluted body of water at the time of the initiation of benthic biological studies in 1951. Industrial, domestic and storm wastes were emptied into these waters with little or no treatment. The inner harbor waters contained little or no dissolved oxygen and much of the benthos was azoic or possessed a stressed community. However, the outer harbor water mass contained adequate dissolved oxygen, and the benthos supported a rich fauna dominated by many species of polychaetes. A pollution abatement program was initiated in 1968, and today many former wastes have been eliminated or are being diverted to treatment plants for processing. The benthic fauna changed markedly and rapidly following this environmental clean-up. Peaks in population were reached throughout the harbor in 1973–1974 which was followed by a slight decline then stability. An oil tanker explosion, pre-treatment of fish-cannery wastes then diversion of these wastes to a sewage treatment plant, and a change from primary to secondary treatment of sewage brought about changes in the benthic fauna. In the latter instance, benthic population of polychaetes, fish populations and the number of birds feeding within the area decreased significantly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01984040
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  • 15
    Electronic Resource
    Electronic Resource
    Photoproduction of πΔ(1.232) from hydrogen in the energy range 2.4–4.8 GeV (1980)
    Springer
    The European physical journal 6 (1980), S. 93-100 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present differential cross sections andΔ ++ spin density matrix elements for the photoproduction processγp→π − Δ ++ and differential cross sections for the processγp→π + Δ 0. The incident photon energy dependence is studied and a comparison is made with previous experiments and with the predictions of a theoretical model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01588835
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  • 16
    Electronic Resource
    Electronic Resource
    Search for fractional charge and heavy stable particles at PETRA (1980)
    Springer
    The European physical journal 6 (1980), S. 295-302 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A search has been made for new particles with chargeQ=2/3, 1, 4/3, 5/3 produced ine + e −-reactions at PETRA. The energy range wasE cm=27–35 GeV. No such particles were found. Upper limits for the cross-section depending on the assumed mass and production spectrum are given. ForQ=2/3 quarks with mass less than 12 GeV/c 2, upper limits $${{\sigma \left( {q\bar q} \right)} \mathord{\left/ {\vphantom {{\sigma \left( {q\bar q} \right)} {\sigma \left( {\mu \mu } \right)}}} \right. \kern-\nulldelimiterspace} {\sigma \left( {\mu \mu } \right)}} \leqq 10^{ - 2} $$ (90% C.L.) are obtained both for inclusive and exclusive production. For the lifetime of theB-meson (m B =5GeV/c 2) an upper limit τ≦2×10−9s is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01474803
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  • 17
    Electronic Resource
    Electronic Resource
    Induction and development of mouse liver glutathione S-transferase activity (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 445-446 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Mouse liver glutathione S-transferase activity at birth was 1/10 that of adults, and increased steadily with each successive week of age until adult values were reached at 8 weeks. Activity was inducible with phenobarbital; however, the percentage increase in activity was dependent upon substrate. 2 distinct peaks of transferase activity were obtained on CM-cellulose chromatography. The ratios of transferase activity observed for each peak demonstrated that glutathione S-transferase activity in mouse liver is associated with at least 2 distinct proteins with differing substrate specificities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01986122
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  • 18
    Electronic Resource
    Electronic Resource
    Ökophysiologische Untersuchungen an Pflanzen der Namib-Wüste (1980)
    Springer
    Naturwissenschaften 67 (1980), S. 21-28 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract The southern Namib desert has a vegetation cover of mainly succulent plants in which species of the Mesembryanthemaceae are predominant. Climatically this area is characterized by hot and dry days, and cool and humid nights with episodic rainfalls only in winter. In this environment a great number of species perform a crassulaceaen acid metabolism (CAM). The responses of these plants to water stress as well as the regulation of CAM in the natural habitat are described and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00424499
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  • 19
    Electronic Resource
    Electronic Resource
    RNA synthesis as a measure of microbial growth in aquatic environments. I. Evaluation, verification and optimization of methods (1981)
    Springer
    Marine biology 64 (1981), S. 1-12 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Measurement of rates of microbial (bacteria and unicellular algae) ribonucleic acid (RNA) synthesis in environmental samples by radioactive tracers requires several assumptions that we test and evaluate herein. After addition of 3H-adenine to water samples from eutrophic freshwater or pelagic and oceanic ecosystems, microorganisms assimilate it without (1) any luxury uptake or (2) any expansion of intracellular adenine nucleotide pools. The calculated rate of stable RNA synthesis tends to be overestimated during the initial time periods of labeling (i.e., less than 30 s for cultures of Serratia marinorubra, and less than 20 min for most environmental samples) due to kinetic compartmentalization of the nucleic acid precursor (ATP) pool. Time-series analyses are recommended because the effects of compartmentalization decrease with increasing incubation. The kinetics of 3H-adenine uptake and aspects of its subsequent assimilation, intermediary metabolism and breakdown are described in bacteria and natural assemblages of microorganisms. Mass-balance radioactivity inventories greatly facilitate interpretation of nucleic acid precursor assimilation. Finally, we demonstrate that independent measurements of precursor (ATP) specific radioactivity are required for any elucidation of rates of stable RNA synthesis (and thus microbial growth) in nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394075
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  • 20
    Electronic Resource
    Electronic Resource
    Leaf temperatures and energy balance ofWelwitschia mirabilis in its natural habitat (1980)
    Springer
    Oecologia 44 (1980), S. 258-262 
    Details
    ISSN: 1432-1939
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Welwitschia mirabilis is a perennial desert plant with extremely large leaves (0.5–1.0 m broad, 1–2 m long). Leaf temperatures were measured in the field and the energy budget was calculated. The portions of the leaf which were kept above the ground had leaf temperatures which were only 4–6°C above air temperature. In the leaf portions which were in contact with the ground leaf temperatures were 6–12°C above air temperature (absolute maximum 51°C). The important feature in the energy budget ofWelwitschia mirabilis is its high reflectivity (38% of the global radiation). Only about 56% of the global radiation is absorbed by the thick leathery leaves. The energy loss due to convection is of the same order of magnitude as the reflection and it is abouy the same in the portions of leaf on and above the ground. The difference in leaf temperatures found in these portions is due to the loss of thermal radiation from the section of leaf above the ground to the cooler ground which is shaded by the leaf. The provision of a heat sink due to the large area of shade cast by these large leaves is of significance to the existence ofWelwitschia mirabilis in its arid habitats.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00572688
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