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  • 1
    Electronic Resource
    Electronic Resource
    Phase locking of Josephson junction arrays (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 1619-1621 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the results of a stability analysis of coherent oscillations in series arrays of Josephson junctions with a matched resistive load. We find that arbitrarily large, dc biased arrays of Josephson junctions will phase lock most strongly when the capacitance parameter βc ≈1, and the bias current is about twice the critical current of the individual junctions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99059
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  • 2
    Electronic Resource
    Electronic Resource
    Carbon and nitrogen nutrition of nodulated roots of grain legumes (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 4 (1981), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The spatial and temporal relationships between carbon (C) metabolism and nitrogen (N) nutrition in grain legumes are of great academic interest with the added bonus that any data for economically important species may ultimately prove useful to breeders and growers. So far there are no data which can be used to relate differences in carbon usage by any symbiotic association with differences in economic yield. Much research has focussed on the dependence of dinitrogen fixation on photosynthate supply, on the C–N relationships of nodulated roots and nodules and on diurnal and seasonal profiles of dinitrogen fixation. In all these aspects a plethora of responses have been described, often based on insufficiently proven measurement techniques; consequently unequivocal conclusions cannot be drawn. We know little about within-species differences due to cultivar, strain of Rhi-zobium or environment, or about the proportions of any heritable variations which might be sufficiently large to merit inclusion among the selection criteria of grain legume breeders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1981.tb00831.x
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  • 3
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    Miller, "Responsibility Accounting and Performance Evaluations" (Book Review) (1983)
    Menasha, Wis. : Periodicals Archive Online (PAO)
    The Accounting Review. 58:1 (1983:Jan.) 202 
    Details
    ISSN: 0001-4826
    Topics: Economics
    Description / Table of Contents: BOOK REVIEWS, PHILIP E. MEYER, Editor
    Notes: Departments
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5030-1983-058-01-000049
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  • 4
    Electronic Resource
    Electronic Resource
    Changes in percentage organic carbon content during ontogeny (1984)
    Springer
    Planta 160 (1984), S. 97-101 
    Details
    ISSN: 1432-2048
    Keywords: Brassica ; Hordeum (C content) ; Carbon content ; Ontogeny and carbon content ; Temperature and carbon content
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in percentage organic carbon content were assessed during the first five weeks of growth of Uniculm barley (Hordeum vulgare) and Brussels sprouts (Brassica oleracea) plants grown in controlled-environment conditions at two constant temperatures, 16° and 22°C. Foliage (leaf laminae), stem, and root material was assayed in both species, together with leaf sheaths of barley and cotyledon laminae of Brussels sprouts. In barley, there was a decline in percentage organic carbon content with increasing foliage age in plants grown at 22°C, but in sheath material there was no significant change at either temperature. Root material showed a decline in percentage carbon content at both growth temperatures, whereas stems showed the opposite trend. Similar results were found in Brussels sprouts, with an overall decline in percentage carbon content in foliage at 22°C and a rise in stem material at both growth temperatures. However, roots showed no significant change in percentage carbon content over the experimental period. The results demonstrate that percentage organic carbon content may change during plant growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392856
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  • 5
    Electronic Resource
    Electronic Resource
    Strain of Rhizobium effects on growth and seed yield of cowpeas (Vigna unguiculata) (1982)
    Springer
    Plant and soil 68 (1982), S. 249-260 
    Details
    ISSN: 1573-5036
    Keywords: Breeding ; Cowpea ; Nitrogen nutrition ; Rhizobium ; Seed yield ; Symbiotic interactions ; Vigna unguiculata L
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Plant of cowpea (Vigna unguiculata (L.) Walp.) cv. TVu 1469 were grown in a plastic house set to simulate tropical temperatures. They were inoculated with one of two strains of Rhizobium and irrigated each day with nutrient solution either devoid of inorganic nitrogen (N) or containing 2.14 mM (30 ppm) N. Strain of Rhizobium significantly affected rates of dry matter and N accumulation as well as the total N content of mature plants. Variations in seed yield were due largely to Rhizobium effects on peduncle production and pod set on each peduncle, wheres inorganic N did not change these yield-determining components significantly. The agronomic and physiological implications of these data are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373711
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of supplemental nitrate and thermal regime on the nitrogen nutrition of chickpea (Cicer arietinum L.) (1985)
    Springer
    Plant and soil 83 (1985), S. 279-293 
    Details
    ISSN: 1573-5036
    Keywords: Cicer arietinum L. ; Chickpea ; Dinitrogen fixation ; Nitrate ; Nitrogen assimilation and distribution ; Rhizobium ; Temperature interactions ; Yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nodulated chickpea plants were grown in pots in a glasshouse programmed to simulate either hot (32.5°C day/18°C night) or warm (25°C/18°C) thermal regimes characteristic of those experienced by crops grown in different seasons or locations in the semi-arid tropics. The plants were irrigated with nutrient solution either devoid of inorganic nitrogen or containing 0.71, 1.43 or 2.86 mM nitrate. Hot days delayed nodulation, decreased specific dinitrogen fixation (acetylene reduction) activity and hastened nodule and host plant senescence compared with these symbiotic attributes in warm days. The effects of nitrate on acetylene reduction activities plant−1 were mediated primarily through changes in the respective rates of nodule establishment, growth and senescence. Nitrate at 0.71 or 1.43 mM stimulated early nodulation and nodule growth but at 1.43 and 2.86 mM it hastened nodule senescence compared with plants totally dependent on symbiotic dinitrogen fixation, particularly in the hot regime. Larger concentrations of nitrate decreased not only symbiotic N2 assimilation during seed filling but also the total N assimilated during the same period. Plants given 2.86 mM nitrate, in either the warm or hot regime, assimilated substantially larger amounts of total N than those dependent on nodules, and then mostlybefore the seed filling period. However, nodule-dependent plants assimilated about 50% of their total Nduring the seed filling stage and the partitioning of N to fruits, stems and roots in mature plants was similar irrespective of thermal regime or nitrogen nutrition. The implications of these data for the nitrogen nutrition of chickpea crops are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02184299
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  • 7
    Electronic Resource
    Electronic Resource
    Effects of supplemental nitrate and thermal regime on the nitrogen nutrition of chickpea (Cicer arietinum L.) (1985)
    Springer
    Plant and soil 83 (1985), S. 265-277 
    Details
    ISSN: 1573-5036
    Keywords: Cicer arietinum L. ; Chickpea ; Dry matter ; Morphology ; Rhizobium ; Temperature interactions ; Yield
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nodulated chickpea plants were grown in pots in a glasshouse programmed to simulate either hot (32.5°C day/18°C night) or warm (25°/18°C) thermal regimes characteristic of those experienced by crops grown in different seasons or locations in the semi-arid tropics. The plants were irrigated with nutrient solution either devoid of inorganic nitrogen or containing 0.71, 1.43 or 2.86 mM nitrate. Increasing concentrations of supplemental nitrate stimulated the rate of dry matter production by vegetative plants in both thermal regimes. Differences between vegetative dry weight of plants given nitrate and those relying exclusively on symbiotic dinitrogen fixation were greatest in the hot regime where the durations of vegetative growth were shorter. However, symbiotically-dependent plants and those given 0.71 mM nitrate continued to produce branches throughout the reproductive period, particularly in the warm regime. As they matured, these plants became more comparable in vegetative stature to those which had received greater concentrations of nitrate and had established final branch numbers earlier (i.e prior to main pod-fill). Potential seed yields were determined primarily by the number of potential reproductive sites (nodes) available (i.e. by the extent of branching) which largely determined the number of seeds harvested. Since final branch numbers in all nitrate treatments were greatest in the warm regime, yields were also larger than those at 32.5°C. The implications of these data for the nitrogen economy of chickpea crops is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02184298
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  • 8
    Electronic Resource
    Electronic Resource
    A comparison of organic and inorganic nitrogen fertilizers: Their nitrate-N and ammonium-N release characteristics and effects on the growth response of lettuce (Lactuca sativa L. cv. Fortune) (1989)
    Springer
    Plant and soil 115 (1989), S. 135-144 
    Details
    ISSN: 1573-5036
    Keywords: growth response ; inorganic fertilizer ; Lactuca sativa L. ; leaching loss ; nitrogen ; organic fertilizer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The response of pot grown lettuce to inorganic (ammonium nitrate) and organic (dried blood and Protox) N fertilizers was determined at two temperature regimes (15°C day/10°C night and 20°C day/15°C night) and related to the NH4−N and NO3−N release characteristics of each material. The N release characteristics of the organic materials matched the N requirements of lettuce more closely than the inorganic fertilizer. However, was rapidly released from the protein based materials such that composts were depleted of available fertilizer N at the same time irrespective of the form supplied. The warmer temperature regimes resulted in a more rapid depletion of the fertilizers due to biological immobilization such that N recoveries in shoots, roots and leachates were reduced. Approximately 20% of the N present in Protox (a material derived from activated sewage sludge, processed to reduce the heavy metal content to minimal levels) appeared to be resistant to microbial degradation and was unavailable to the plants. Therefore, the growth response of lettuce was slightly reduced with Protox compared to the other materials at similar rates of incorporation. The organic materials did not contribute NO3−N to the plant and small NO3−N concentrations in petioles were derived from the water used for irrigation. However, NO3−N levels in plants receiving inorganic ammonium nitrate were initially high but progressively declined as the fertilizer NO3−N became depleted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02220704
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