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  • 1995-1999  (5)
  • 1
    Electronic Resource
    Electronic Resource
    The Role of Geographical Information Systems in Urban Hydrological Modelling (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 13 (1999), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: ‘Geographical information systems’(GIS) technology holds considerable benefits to urban hydrology because of the spatial nature of catchment analysis. The availability of a spatio-temporal database of catchment characteristics can eliminate the adoption of simplifying assumptions, which reduce the quality of a research study. This research study was undertaken to demonstrate the need for accurate spatial and temporal accounting of land-use in an urbanizing catchment. The definition of the extent of GIS use, the approach to its integration into a study, and spatial database development, are crucial for eventual success.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1999.tb01035.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The light induction of maize phosphoenolpyruvate carboxylase kinase translatable mRNA requires transcription but not translation (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 22 (1999), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: We have previously demonstrated that the level of translatable mRNA for phosphoenolpyruvate carboxylase kinase in maize leaves is increased in response to light (Hartwell et al. 1996; Plant Journal10, 1071–1078). To identify the steps required for this increase, we have examined the effects of protein and RNA synthesis inhibitors. The RNA synthesis inhibitors actinomycin D and cordycepin (500 μM) strongly inhibited the light-induced increases in kinase translatable mRNA and the apparent phosphorylation state of phosphoenolpyruvate carboxylase, as judged by its sensitivity to inhibition by L-malate. The protein synthesis inhibitors cycloheximide and puromycin blocked the light-induced increase in the apparent phosphorylation state of phosphoenolpyruvate carboxylase but not the increase in kinase translatable mRNA. Indeed, the amount of phosphoenolpyruvate carboxylase kinase translatable mRNA after 3 h of illumination of leaves treated with either 1 mM puromycin or 100 μM cycloheximide was double that in illuminated control leaves. Each inhibitor reduced the light-induction of two control genes, malic enzyme and pyruvate, phosphate dikinase. Thus the light induction of phosphoenolpyruvate carboxylase kinase translatable mRNA requires RNA synthesis, but not protein synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1999.00455.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    UV and blue light signal transduction in Arabidopsis (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 20 (1997), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The application of genetic and biochemical approaches in Arabidopsis has generated new insights into the photoreceptors and signal transduction processes that mediate the effects of UV and blue light on gene expression and development. Biochemical studies with an Arabidopsis cell culture have provided information on the signal transduction events that couple UV-B and UV-A/blue light perception to transcription of the chalcone synthase (CHS) gene. Interactions between UV-B and both UV-A and blue light signalling pathways enhance the level of CHS transcription. Mutants which identify negative regulators of CHS transcription in response to UV and blue light have been isolated. The integration of biochemical and genetic approaches will further advance understanding of UV and blue light perception and signal transduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-3040.1997.d01-105.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Genetic control of synapsis and recombination in Lolium amphidiploids (1995)
    Springer
    Chromosoma 104 (1995), S. 164-168 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Homologous bivalent formation in amphidiploids of Lolium is promoted during meiosis by diploidising genes carried by A-chromosomes and by supernumerary B-chromosomes. The site and mode of action of these diploidising factors were investigated by comparing the relative frequencies of pairing configurations at meiotic prophase and metaphase I in several different hybrid genotypes. The results indicate that diploidising genes act predominatly by increasing the stringency of synapsis at early stages of meiotic prophase. By contrast, B-chromosomes appear to promote bivalent formation by ensuring that homoeologously paired chromosome segments within multivalents do not crossover. The results show that the additive effects of diploidising genes and B-chromosomes are to a certain extent separable in terms of their mode of action and timing during meiosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352180
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Genetic control of synapsis and recombination in Lolium amphidiploids (1995)
    Springer
    Chromosoma 104 (1995), S. 164-168 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Homologous bivalent formation in amphidiploids of Lolium is promoted during meiosis by diploidising genes carried by A-chromosomes, and by supernumerary B-chromosomes. The site and mode of action of these diploidising factors were investigated by comparing the relative frequencies of pairing configurations at meiotic prophase and metaphase I in several different hybrid genotypes. The results indicate that diploidising genes act predominantly by increasing the stringency of synapsis at early stages of meiotic prophase. By contrast, B-chromosomes appear to promote bivalent formation by ensuring that homoeologously paired chromosome segments within multivalents do not crossover. The results show that the additive effects of diploidising genes and B-chromosomes are to a certain extent separable in terms of their mode of action and timing during meiosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00352180
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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