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  • 1
    Electronic Resource
    Electronic Resource
    Stochastic partial differential equations in groundwater hydrology (1991)
    Springer
    Stochastic environmental research and risk assessment 5 (1991), S. 239-251 
    Details
    ISSN: 1436-3259
    Keywords: Parameter estimation ; maximum likelihood estimation ; stochastic partial differential equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract Part I of this series of two papers (Unny, 1989) dealt with the theoretical derivation of the moment equations for the stochastic partial differential equation in the water table depth forced by stochastic rainfall input. Part I also developed a maximum likelihood estimation procedure for parameter determination. The primary aim of the present manuscript is the application of the parameter estimation procedure to the Borden aquifer, an aquifer designated as an experimental site, where extensive field measurements have been carried out. Estimates of hydraulic conductivity and transmissivity for the Borden aquifer, derived from the maximum likelihood algorithm, have been compared with estimates obtained by “traditional” procedures. The paper also presents the simulated solution of the governing differential equation in the one dimensional problem applied to the Borden aquifer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01544060
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Somatic embryogenesis and plant regeneration from callus cultures of Aconitum heterophyllum Wall (1993)
    Springer
    Plant cell, tissue and organ culture 32 (1993), S. 213-218 
    Details
    ISSN: 1573-5044
    Keywords: Aconitum heterophyllum ; endangered medicinal plant ; somatic embryogenesis ; regeneration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Plants were obtained via somatic embryogenesis in callus derived from in vitro raised leaf and petiole explants of Aconitum heterophyllum Wall. Callus was induced on a Murashige-Skoog medium supplemented with either 2,4-dichlorophenoxy acetic acid (2,4-d 1 mg l-1) and kinetin (KN 0.5 mg l-1) with coconut water (CW 10% v/v) or naphthalene acetic acid (NAA 5 mg l-1) and benzylaminopurine (BAP 1 mg l-1). Somatic embryos appeared after 2–3 months or 2 subculture passages when 2,4-d or NAA induced source of the callus was transferred to a MS medium containing BAP (1 mg l-1) and NAA (0.1 mg l-1). For successful plantlet formation, the somatic embryos were transferred to a medium containing 1/4 strength MS nutrient with indole-3-butyric acid (IBA 1 mg l-1). Alternatively, the somatic embryos were dipped in a concentrated solution of IBA for 5 min and placed on a hormone free medium. Complete plantlets were formed after 4 weeks and were transferred successfully to soil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00029845
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    Paper (German National Licenses)
    Fulltext
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