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  • 1995-1999
  • 1980-1984  (9)
  • 1960-1964
  • 1935-1939
  • 1984  (9)
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Years
  • 1995-1999
  • 1980-1984  (9)
  • 1960-1964
  • 1935-1939
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Growth rate, senescence and photosynthesis of ryegrass swards cut to maintain a range of values for leaf area index (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 39 (1984), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: An experiment was carried out in which simulated swards of ryegrass (cv. S23) were grown in boxes. In the first instance the swards were cut at weekly intervals to maintain five levels of leaf area index (LAI) from LAI 1 to 4–5 in simulation of continuous grazing. Measurements were made of growth, senescence and net growth rate and of net canopy photosynthesis at constant irradiance. The results showed that the swards adapted to the defoliation regimes mainly by changes in tiller population density and pseudostem length. When the swards had equilibrated to the cutting regime growth rate increased with LAI but, since tiller density and the partitioning of growth between herbage harvested and that lost by sensecence also changed with LAI, net growth rate was constant over the LAI range 2–4·5. Maximum weight of herbage harvested was obtained between LAI 2 and 3.After 10 weeks of weekly cutting all the swards were cut back to LAI 1 and allowed to regrow. Growth rate showed almost no response to the previous culling treatments. The relationship of net canopy photosynthesis to LAI was linear for the frequently defoliated swards and curvilinear for regrowing swards. The reasons for this difference were examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1984.tb01709.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photosynthetic rate and carbon balance of grazed ryegrass pastures (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 39 (1984), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: The relationship between net canopy photosynthesis (Pnc) measured at 400 J m−2 s-1 and leaf area index (LAI) was determined on ryegrass-dominant swards over a range of her bage masses in five grazing experiments. In three experiments the swards were continuously stocked either by sheep or by cattle to maintain a number of herbage heights and hence LAI values. In two experiments the swards were intermittently grazed with 21 -d regrowth intervals. On the continuously stocked swards measurements were made over nine periods each of 7 to 21 d in length. On the intermittently grazed swards measurements were made over six periods while the herbage was being grazed down from a high to a low LAI and over three periods during the regrowth phase.On all the swards where measurements were made while grazing was in progress, the relation of Pnc to LAI was linear. The photosynthetic rate was greater on the continuously grazed than on the intermittently grazed swards up to LAI 35 and in two experiments to LAI 5. The relationship of Pnc to LAI of swards in the regrowth phase was predominantly curvilinear and such that over much of the LAI range they had a greater photosynthetic potential than the same swards being grazed down from high to low mass. Daily rates of CO2 uptake and growth in the field were calculated for one continuously stocked experiment. Both were linearly related to LAI in the range LAI 2–4·5. The agronomic implications of the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1984.tb01668.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A unique method of computerizing chemical process information (1984)
    s.l. : American Chemical Society
    Journal of chemical information and modeling 24 (1984), S. 148-152 
    Details
    ISSN: 1520-5142
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ci00043a005
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Fishburn, Evelyn: The Portrayal of Immigration in Nineteenth Century Argentine Fiction (1845–1902) : Berlin, Colloquium-Verlag, 1981 (1984)
    Cambridge : Cambridge University Press
    Journal of Latin American studies 16 (1984), S. 236-237 
    Details
    ISSN: 0022-216X
    Source: Cambridge Journals Digital Archives
    Topics: Political Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022216X00004375
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mora, Carl J.: Mexican Cinema – Reflections of a Society 1896–1980 : Berkeley and London, University of California Press, 1982 (1984)
    Cambridge : Cambridge University Press
    Journal of Latin American studies 16 (1984), S. 226-227 
    Details
    ISSN: 0022-216X
    Source: Cambridge Journals Digital Archives
    Topics: Political Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022216X00004284
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Solar radio burst and in situ determination of interplanetary electron density (1984)
    Springer
    Solar physics 90 (1984), S. 401-412 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We review and discuss a few interplanetary electron density scales which have been derived from the analysis of interplanetary solar radio bursts, and we compare them to a model derived from 1974–1980 Helios 1 and 2 in situ density observations made in the 0.3–1.0 AU range. The Helios densities were normalized to 1976 with the aid of IMP and ISEE data at 1 AU, and were then sorted into 0.1 AU bins and logarithmically averaged within each bin. The best fit to these 1976-normalized, bin averages is N(R AU) = 6.1R -2.10 cm-3. This model is in rather good agreement with the solar burst determination if the radiation is assumed to be on the second harmonic of the plasma frequency. This analysis also suggests that the radio emissions tend to be produced in regions denser than the average where the density gradient decreases faster with distance than the observed R -2.10.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00173965
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Computed tomography of rhinocerebral mucormycosis (1984)
    Springer
    Neuroradiology 26 (1984), S. 71-73 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; mucormycosis ; radiology ; diabetes mellitus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Rhinocerebral mucormycosis is a rare fungal infection which is frequently fatal. Survival depends on early diagnosis and immediate aggressive treatment. Previously described radiological changes have been non-specific. The CT features of two cases are described. Non-enhancement of the superior ophthalmic vein and ophthalmic artery appears to be a C sign specific to this disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328210
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Direct sampling and in situ observation of a persistent copepod aggregation in the mesopelagic zone of the Santa Barbara Basin (1984)
    Springer
    Marine biology 80 (1984), S. 75-81 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Observations from a one-person submersible (“Wasp”) in fall, 1982, revealed a persistent aggregation of non-migrating, Stage V copepodites of Calanus pacificus californicus Brodsky in a band 20±3 m thick at a depth of 450 m, about 100 m above the bottom of the Santa Barbara Basin, California. Copepod abundances, calculated from nearest-neighbor distances measured directly from the submersible, yielded maximum densities of 26×106 copepodites m-3. Quiescent behavior, low laminarinase activity, low protein content, high lipid content and evidence of low excretion rate all suggest that these copepodites were in a state of diapause. Diapausing C. pacificus californicus at other locations along the eastern Pacific coast were also captured in discrete depth plankton tows. Both the submersible observations and the net collections suggest that the dense aggregation of diapausing copepods we observed in the Santa Barbara Basin was a phenomenon associated with seasonal upwelling cycles, and that such aggregations occur during non-upwelling periods when food is scarce in surface waters. Numerous predators, especially the deep sea smelt Leuroglossus stilbius, were observed feeding upon the aggregated copepods; thus, in contrast to the conventional picture of surface-dominated food distribution, deep-water aggregations of C. pacificus californicus may support the mesopelagic community during periods of low food availability in surface waters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393130
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Size exclusion chromatography of urea formaldehyde resins in dimethylformamide containing lithium chloride (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 29 (1984), S. 3863-3872 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A rapid, reproducible method for investigating the molecular mas distribution of urea formaldehyde resins by size exclusion chromatography has been developed. By using concentrated lithium chloride solution to prepare the sample, materials of high viscosity and high molecular mass can be easily dissolved. Chromatography in dimethyl formamide containing lithium chloride eliminates hydrogen bonding and ensures that realistic values for molecular mass averages are obtained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1984.070291219
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    Paper (German National Licenses)
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