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  • 1
    Electronic Resource
    Electronic Resource
    The Relationship between Mutual Family Relations and Child Psychopathology (1998)
    Oxford, UK and Boston, USA : Blackwell Publishers Ltd.
    The @journal of child psychology and psychiatry 39 (1998), S. 0 
    Details
    ISSN: 1469-7610
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: The associations of the mutual mother-child, father-child, and mother-father relationship and various patterns of family relations with child psychopathology were investigated in a sample of 137 families referred to outpatient mental health services. Assessment of the relative association of the different family dyads showed that both the mother-child and the mother-father relationship were related to child problem behaviour. However, whereas the mother-child relationship was consistently more related to externalising behaviour, the mother-father relationship was particularly related to internalising behaviour. Our findings gave clear support for the cumulative risk model: having more negatively qualified relationships was associated with more problem behaviour. Furthermore, our results suggested a protective influence of the parent-child relationship: having one or two positive parent-child relationships was associated with less problem behaviour. No support was found for the cross-generational coalition hypothesis. Implications for future research are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/1469-7610.00344
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  • 2
    Electronic Resource
    Electronic Resource
    Shoot regeneration in long-term callus cultures derived from mature flowering plants of Cyclamen persicum Mill. (1996)
    Springer
    Plant cell reports 15 (1996), S. 545-548 
    Details
    ISSN: 1432-203X
    Keywords: Primulaceae ; tissue culture ; regeneration ; somaclonal variation ; organogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary In long-term callus cultures of Cyclamen persicum Mill. two types of tissue could be distinguished. One type featured a brown suberised outer layer and was poorly organogenic. The other type was yellowish in appearance and gave rise to many shoot buds. Both types co-existed on the same callus, the former prevailing. Selection for organogenic tissue resulted in cultures yielding approximately three times more petioles than random subcultures. Callus-derived shoots could be rooted and established in the greenhouse. The method allowed for the production of thousands of plants but the regenerants often showed deviant phenotypes and genotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232991
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Shoot regeneration in long-term callus cultures derived from mature flowering plants of Cyclamen persicum Mill. (1996)
    Springer
    Plant cell reports 15 (1996), S. 545-548 
    Details
    ISSN: 1432-203X
    Keywords: Abbreviations: BA, 6-benzylaminopurine; BMP, basal medium propagation; BMR, basal medium rooting; DAPI, 4', 6-diamino-2-phenylindole; KIBA, potassium salt of indole-3-butyric acid; kinetin, 6-furfurylaminopurine; MS, Murashige and Skoog; NAA, 1-naphthaleneacetic acid ; Key words:Primulaceae, tissue culture, regeneration, somaclonal variation, organogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary. In long-term callus cultures of Cyclamen persicum Mill. two types of tissue could be distinguished. One type featured a brown suberised outer layer and was poorly organogenic. The other type was yellowish in appearance and gave rise to many shoot buds. Both types co-existed on the same callus, the former prevailing. Selection for organogenic tissue resulted in cultures yielding approximately three times more petioles than random subcultures. Callus-derived shoots could be rooted and established in the greenhouse. The method allowed for the production of thousands of plants but the regenerants often showed deviant phenotypes and genotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002990050071
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Breeding of transgenic orangePetunia hybrida varieties (1995)
    Springer
    Euphytica 84 (1995), S. 175-181 
    Details
    ISSN: 1573-5060
    Keywords: Petunia hybrida ; petunia ; flower ; colour ; DFR ; maize dihydroflavonol-4-reductase ; anthocyanin biosynthesis ; genetic modification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Flower colour is the major contributor to the total ornamental value of a flower. The combination of biochemical knowledge and genetic engineering technology has resulted in the addition of a new colour to the existing colour range ofPetunia hybrida. This has been achieved by expression of the maize dihydroflavonol-4-reductase (DFR) gene in a suitable petunia acceptor which leads to the accumulation of pelargonidin-derived pigments in flowers. The resulting flower colour, however, was a pale brick-red, which is commercially unattractive in petunia. Our objective was to produce a product suitable for commercialisation by introducing the DFR gene into our breeding material via normal sexual recombination. Although the initial transformant exhibited many negative characteristics, first analyses indicated that it was feasible to obtain material for creating commercial hybrids. Experimental hybrids based on F4 lines were obtained with improved phenotypical expression of the orange flower colour in combination with a good general performance. In order to assess consumer-related characteristics, selected experimental hybrids were tested under field conditions. All transgenic plants had a normal appearance when compared to non-transgenic control plants. No linkage was observed between the transgenic trait and any negative characteristic. From these studies it can be concluded that through a combination of biochemistry, breeding and genetic engineering it is possible to generate unique flower colours in a cultivar with commercial potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01681809
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  • 5
    Electronic Resource
    Electronic Resource
    Breeding of transgenic orange Petunia hybrida varieties (1955)
    Springer
    Euphytica 85 (1955), S. 403-409 
    Details
    ISSN: 1573-5060
    Keywords: Petunia hybrida ; petunia ; flower ; colour ; DFR ; maize dihydroflavonol-4-reductase ; anthocyanin biosynthesis ; genetic modification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Colour is the major contributor to the total ornamental value of a flower. The combination of biochemical knowledge and genetic engineering technology has resulted in the addition of a new colour to the existing colour range of Petunia hybrida. This has been achieved by expression of the maize dihydroflavonol-4-reductase (dfr) gene in a suitable petunia acceptor which leads to the accumulation of pelargonidin-derived pigments in flowers. The resulting flower colour, however, was a pale brick-red, which is commercially unattractive in petunia. Our objective was to produce a product suitable for commercialisation by introducing the dfr gene into our breeding material via normal sexual recombination. Although the initial transformant exhibited many negative characteristics, first analyses indicated that it was feasible to obtain suitable material for creating commercial hybrids. Experimental hybrids based on F4 lines were obtained with improved phenotypic expression of the orange flower colour in combination with a good general performance. In order to assess consumer-related characteristics, selected experimental hybrids were tested under field conditions. All transgenic plants had a normal appearance when compared with non-transgenic control plants. No linkage was observed between the transgenic trait and any negative characteristic. From these studies it can be concluded that through a combination of biochemistry, breeding and genetic engineering, it is possible to generate unique flower colours in a cultivars with commercial potential.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023973
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Continuous time state space modeling of panel data by means of sem (2000)
    Springer
    Psychometrika 65 (2000), S. 199-215 
    Details
    ISSN: 1860-0980
    Keywords: continuous time state space modeling ; exact discrete model ; linear stochastic differential equations ; longitudinal structural equation modeling ; panel analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Abstract Maximum likelihood parameter estimation of the continuous time linear stochastic state space model is considered on the basis of largeN discrete time data using a structural equation modeling (SEM) program. Random subject effects are allowed to be part of the model. The exact discrete model (EDM) is employed which links the discrete time model parameters to the underlying continuous time model parameters by means of nonlinear restrictions. The EDM is generalized to cover not only time-invariant parameters but also the cases of stepwise time-varying (piecewise time-invariant) parameters and parameters varying continuously over time according to a general polynomial scheme. The identification of the continuous time parameters is discussed and an educational example is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02294374
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