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  • Articles: DFG German National Licenses  (4)
  • Electronic Resource  (4)
  • Collusion  (2)
  • Micropropagation  (2)
Source
  • Articles: DFG German National Licenses  (4)
Material
  • Electronic Resource  (4)
Years
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Adventitious bud development in embryonic tissue of Pinus caribaea and Pseudotsuga menziesii (1988)
    Springer
    Trees 2 (1988), S. 32-38 
    Details
    ISSN: 1432-2285
    Keywords: Auxin ; Cytokinin ; Gymnosperm ; Micropropagation ; Tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Adventitious bud formation was induced on detached cotyledons and on cotyledons attached to excised embryos of Pinus caribaea and Pseudotsuga menziesii. The embryonic tissue was exposed to the cytokinin 6-benzyl amino purine contained within an agar medium. This exposure resulted in the formation of a meristematic zone, involving both epidermal and sub-epidermal cells, and then nodules on the tissue surface. Some of these nodules were induced to differentiate into bud primordia, and thence shoots, following exposure to a combination of auxin (IAA) and cytokinin. Shoots were produced over the entire surface of detached cotyledons of Ps. menziesii but predominantly on the adaxial surfaces of detached cotyledons of Pi. caribaea and the tips and adaxial surfaces of the cotyledons on the entire embryos of both species. Thus, inter-specific differences in the distribution of competent areas for adventitious bud production were detected in embryos.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00196977
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Adventitious bud development in embryonic tissue ofPinus caribaea andPseudotsuga menziesii (1988)
    Springer
    Trees 2 (1988), S. 32-38 
    Details
    ISSN: 1432-2285
    Keywords: Auxin ; Cytokinin ; Gymnosperm ; Micropropagation ; Tissue culture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Adventitious bud formation was induced on detached cotyledons and on cotyledons attached to excised embryos ofPinus caribaea andPseudotsuga menziesii. The embryonic tissue was exposed to the cytokinin 6-benzyl amino purine contained within an agar medium. This exposure resulted in the formation of a meristematic zone, involving both epidermal and sub-epidermal cells, and then nodules on the tissue surface. Some of these nodules were induced to differentiate into bud primordia, and thence shoots, following exposure to a combination of auxin (IAA) and cytokinin. Shoots were produced over the entire surface of detached cotyledons ofPs. menziesii but predominantly on the adaxial surfaces of detached cotyledons ofPi. caribaea and the tips and adaxial surfaces of the cotyledons on the entire embryos of both species. Thus, inter-specific differences in the distribution of competent areas for adventitious bud production were detected in embryos.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196342
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    CooperationV. Rivalry and factors facilitating collusion (1994)
    Springer
    Review of industrial organization 9 (1994), S. 823-838 
    Details
    ISSN: 1573-7160
    Keywords: Collusion ; conjectures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract A perennial topic in industrial economics is collusion. Kwoka and Ravenscraft (1986) developed a model to measure the collusiveness of conjectures across industries as a function of intra-industry rivalry among leading firms. But extensive literature suggests that the degree of collusion may also depend upon underlying market characteristics. We modify the Kwoka and Ravenscraft model to account for this. Our results suggest that underlying market characteristics do matter. Intra-industry rivalry and conjectures vary with the level and stability of concentration, and to a lesser degree with product homogeneity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01026587
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Efficiencyv. collusion: Evidence cast in cement (1994)
    Springer
    Review of industrial organization 9 (1994), S. 379-392 
    Details
    ISSN: 1573-7160
    Keywords: Collusion ; efficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract Through the 1970s and 1980s, the U.S. portland cement industry experienced a significant increase in average plant size and market concentration. A simultaneous equation model is developed to examine the effects of plant size and concentration on costs, prices and margins in that industry. The results indicate the presence of significant scale economies, but also show that prices and margins are increasing in concentration. Further analysis shows that almost one third of the cost savings associated with larger plants are passed on to producers through higher margins resulting from concomitant increases in concentration, rather than to consumers as lower prices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01029512
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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