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  • Electronic Resource  (8)
  • 1980-1984  (8)
  • 1981  (8)
Source
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  • Electronic Resource  (8)
Years
  • 1980-1984  (8)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Dimethylcyclodecyl cations. Evidence for .mu.-hydrido bridging (1981)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 103 (1981), S. 588-596 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00393a015
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    SUBSTANCE ABUSE AND ARRESTS Variations in Pretreatment Arrests of Clients in Drug Treatment Programs (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Criminology 19 (1981), S. 0 
    Details
    ISSN: 1745-9125
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Law
    Notes: This study examines variations in pretreatment arrest patterns of clients admitted to federally funded drug treatment programs. Data from published annual reports of the Client Oriented Data Acquisition Process (CODAP)-the nationol monitoring system of drug abuse treatment-are used. Variations based on sex and age are found, but not for race. The type of drug abuse was associated with differential arrest patterns. The results suggested that cocaine and hallucinogen users were more likely to have been arrested of the ten categories of drug users considered
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1745-9125.1981.tb00419.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Endogenous gibberellins and amylase activity in tall and dwarf strains of rice (Oryza sativa) (1981)
    Springer
    Cellular and molecular life sciences 37 (1981), S. 363-364 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary 2 tall and 7 dwarf strains of rice were sprayed with 0 or 40 μg ml−1 GA3, 4 dwarf strains responded to exogenous GA3, and showed a markedly lower endogenous gibberellin content than the tall strains, while 2 dwarf strains did not respond to GA3 application and had considerably higher endogenous gibberellin levels than the tall ones. Amylase activity in germinating seeds showed a significant negative correlation with the endogenous gibberellin content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01959863
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of different levels of nitrogen and farmyard manure on yield and quality of spinach (Spinacea oleracea L.) (1981)
    Springer
    Plant foods for human nutrition 31 (1981), S. 163-170 
    Details
    ISSN: 1573-9104
    Keywords: farmyard manure ; nitrogen levels ; Spinacea oleracea L. ; spinach quality ; spinach yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effect of different levels of nitrogen N0(0kg/ha), N1(30 kg/ha), N2 (60 kg/ha), and N3 (90 kg/ha) and farmyard manure F0 (0 tonnes/ha), F1 (10 tonnes/ha), and F2 (20 tonnes/ha) on the yield and nutrient composition of spinach and its uptake was investigated on a sandy loam soil. Yield; phosphorus, iron, manganese, zinc, and copper uptakes; and ascorbic acid content increased with the application of both the inorganic nitrogen fertilizer and the farmyard manure, with a maximum at the N3F2 level, i.e. at 90 kg N/ha with 20 tonnes FYM/ha. However, the contents of protein, β-carotene, and reducing sugars were maximum at the highest dose of nitrogen without the application of farmyard manure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01094040
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Interracial hybridization in Drosophila ananassae (1981)
    Springer
    Genetica 57 (1981), S. 139-142 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Crosses were made between strains of Drosophila ananassae, homozygous for the ST or AL gene sequences in the second chromosome, and originating from geographically distant localities in India. All interracial crosses were maintained separately in culture bottles for ten generations. After ten generations it was observed that the inversion heterozygotes were heterotic. Thus it was found that interracial hybridization does not lead to breakdown of heterosis. Therefore, it has been suggested that localised coadaptation is absent in the natural populations of Indian D. ananassae. Thus D. ananassae does not show the pattern of some other species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00131239
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    O2 uptake through water during early life of Heteropneustes fossilis (Bloch) (1981)
    Springer
    Hydrobiologia 78 (1981), S. 81-86 
    Details
    ISSN: 1573-5117
    Keywords: metabolism ; oxygen uptake ; respiration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The O2 uptake through water has been measured in case of Heteropneustes fossilis during development and growth and its relationship to body size established. A higher rate of O2 uptake during the early phase of ontogenesis is related to intense growth of the respiratory surface area and increasing metabolic demand of the fish. The logarithmic plot of data for O2 uptake in relation to body size shows a statistically significant two-component curve; one related to the fish when it is a fully aquatic breather and the other when it changes to bimodal gas exchange. The onset of the air breathing habit brings about a 40% drop in O2 uptake through water, which is made good through the newly developed air breathing organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00011944
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Properties of high-alumina cement reinforced with alkali resistant glass fibres (1981)
    Springer
    Journal of materials science 16 (1981), S. 2597-2607 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The changes in the mechanical properties of cement composites made from high-alumina cement and Cem-FIL AR-glass fibres kept in three different environments up to 10 years are described. While the flexural and impact properties of the composite remained largely unaffected with time in a relatively dry atmosphere, in wet conditions a reduction in strength takes place. In natural weather the 10 year modulus of rupture and impact strength values are 22.8 MIN m−2 and 6.7 KJ m−2, respectively, corresponding to the 28 day values of 41.2 MN m−2 and 22.8 KJ m−2. These values are significantly better than the corresponding results obtained with Portland cement composites made from Cem-FIL fibres. High-alumina cement composites reinforced by E-glass fibre lose a very large proportion of their flexural and impact strength under wet conditions. The strength reduction with time observed for glass fibre reinforced high-alumina cement composites can be related to two sources: (a) the reduction in the strength of the glass fibre due to chemical corrosion and (b) “conversion” of the matrix. The latter has greater influence on those composite properties that are matrix controlled such as the Young's modulus whereas any significant reduction in fibre tensile strength is reflected in a corresponding loss in composite tensile and bending strength. Matrix conversion may also influence the fibre-matrix bond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01113602
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Closed-form solutions for finite length crack moving in a strip under anti-plane shear stress (1981)
    Springer
    Acta mechanica 38 (1981), S. 99-109 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung In dieser Arbeit werden exakte Ausdrücke für die antiplanen, dynamischen Spannungsverteilungen um Risse endlicher Länge, die sich mit konstanter Geschwindigkeit in einem unendlich langen Streifen begrenzter Breite ausbreiten, bestimmt. Zwei Fälle von praktischer Bedeutung werden untersucht. Erstens werden die Seitenränder des Streifens eingespannt und sowohl in dieser als auch in entgegengesetzter Richtung versetzt, um einen antiplanen Schub zu erzeugen, der eine Aufreißbewegung längs der Vorderkante des Risses bewirkt und zweitens werden die Seitenränder des Streifens einer Schubspannung unterworfen. Die Lösung jedes Problems wird durch die Verwendung der Fouriertransformationen auf die Lösung zweier dualer Integralgleichungen reduziert. Es werden Lösungen dieser Integralgleichungen in geschlossener Form erhalten, die auf exakte Ausdrücke für den Spannungsintensitätsfaktor führen. Numerische Ergebnisse werden in graphischer Form gezeigt.
    Notes: Summary In this paper exact expressions for the anti-plane dynamic stress distributions around finite length cracks propagating with constant velocity in infinitely long finite width strips are determined. Two cases of practical importance are investigated. Firstly, the lateral boundaries of the strip are clamped and displaced in equal and opposite directions, to produce anti-plane shear resulting in a tearing motion along the leading edge of the crack and, secondly, the lateral boundaries of the strip are subjected to shearing stresses. Employing Fourier transforms the solution of each problem is reduced to solving a pair of dual integral equations. Closed-form solutions of these integral equations are obtained leading to exact expressions for the stress intensity factors. Numerical results are presented in graphical form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351465
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    Paper (German National Licenses)
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