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  • 1
    Digitale Medien
    Digitale Medien
    Somaclonal variation in cell suspension culture-derived regenerants of Cymbopogon martinii (Roxb.) Wats var. motia (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 118 (1999), S. 0 
    Details
    ISSN: 1439-0523
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Plants regenerated from cell suspension cultures of palmarosa grass, Cymbopogon martinii (Roxb.) Wats, were analysed for somaclonal variation in five clonal generations. A wide range of variation in important quantitative traits, e.g. plant yield, height, tiller number, oil content and qualitative changes in essential oil constituents—geraniol, geranyl acetate, geranyl formate and linalool—were observed among the 120 somaclones screened. Eight somaclones were selected on the basis of high herb and oil yield over the donor line and high geraniol content in the oil. Based on performance in the field trials, three superior lines were selected, and maintained for five clonal generations. The superior lines exhibited a reasonable degree of stability in the traits selected.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1439-0523.1999.00383.x
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  • 2
    Digitale Medien
    Digitale Medien
    Growth, feed utilization and carcass composition of catfish Clarias batrachus (Linn.) fingerlings fed on dried fish and chicken viscera incorporated diets (2000)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 31 (2000), S. 0 
    Details
    ISSN: 1365-2109
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: A 30-day feeding trial was conducted to evaluate dried fish and chicken viscera, and a combination of oil cakes as complete substitutes for fish meal in the diet of catfsh Clarias batrachus (Linn.) fingerlings. Triplicate groups of fingerlings with a mean initial body weight of 2.0 g were each fed four isonitrogenous diets at 4% of wet body weight. Performance of the diets was judged on the basis of feed acceptability, body weight gain, feed conversion ratio and protein efficiency ratio. A significant increase (P 〈 0.05) in body weight gain, protein efficiency ratio and a decreased feed conversion ratio (P 〈 0.05) was observed in fish fed on fish meal, followed by fish viscera, chicken viscera and only plant protein incorporated diets. Although inferior to fish meal and dried fish viscera, growth and feed utilization responses of fingerlings fed on dried chicken viscera and plant protein diets were similar. The fish accumulated a significantly greater (P 〈 0.05) amount of fat (18.3%) in the body carcass when fish viscera was incorporated in the diet. The study revealed that satisfactory growth and feed utilization responses could be achieved through replacement of fish meal by dried fish and chicken viscera in the diet of catfish fingerlings.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-2109.2000.00499.x
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  • 3
    Digitale Medien
    Digitale Medien
    Synthesis and structure-activity relationship of 2,5-diaryltetrahydrofurans as PAF antagonists
    Amsterdam : Elsevier
    Prostaglandins 35 (1988), S. 846 
    Details
    ISSN: 0090-6980
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0090-6980(88)90255-9
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  • 4
    Digitale Medien
    Digitale Medien
    Effect of stocking density on growth and survival of Clarias batrachus (Linn.) larvae and fry during hatchery rearing (2004)
    Berlin, Germany : Blackwell Verlag GmbH
    Journal of applied ichthyology 20 (2004), S. 0 
    Details
    ISSN: 1439-0426
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Experiments were conducted to determine optimum stocking density for Clarias batrachus larvae and fry during hatchery rearing. The increase in stocking density decreased the total weight, specific growth rate (SGR) and percent weight gain of Clarias larvae during a 13-day experiment. Survival rate was highest at a stocking density of 1000 m−2 and lowest at 5000 m−2. Stocking density did not influence the total biomass production of larvae. Clarias batrachus fry performance was studied during a 28-day hatchery rearing experiment whereby fry stocked at a density of 100 m−2 attained the highest total body weight (P 〈 0.05). The survival rate greatly declined to 59–61% by a density increase to 300 m−2 and above. Stocking density influenced growth and survival of C. batrachus larvae and fry during hatchery rearing. The best performance was obtained when larvae were stocked at 2000 m−2; survival was highest with C. batrachus fry stocked at 200 m−2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1439-0426.2004.00534.x
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  • 5
    Digitale Medien
    Digitale Medien
    Rapid propagation of lemongrass (Cymbopogon flexuosus (Nees) Wats.) through somatic embryogenesis in vitro (1996)
    Springer
    Plant cell reports 15 (1996), S. 367-370 
    Details
    ISSN: 1432-203X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract. Somatic embryos induced from callus cultures of lemongrass [Cymbopogon flexuosus (Nees) Wats.] on Murashige and Skoog medium supplemented with 5 mg/l of 2,4-D, 0.1 mg/l of NAA and 0.5 mg/l of Kn developed into plantlets when plated on a medium supplemented with 3 mg/l of BA, 1 mg/l of GA3 and 0.1 mg/l of NAA. The regeneration potential of callus was retained for more than 2 years on the nutrient medium supplemented with comparatively lower levels of growth regulators (2,4-D at 2 mg/l, NAA at 0.1 mg/l and Kn at 0.25 mg/l). Approximately 30–35 plantlets were produced after two months of culture per 100 mg of callus inoculated. Regenerants were transplanted into soil and transferred to the field for assessment of various morphological and biochemical characteristics. The results of 1 year of field trials showed that plants derived from somatic embryoids were more uniform in all the characteristics examined when compared with the field performance of plants raised through slip by standard propagation procedures. Thus, a procedure has been developed for high frequency long term plant production of lemongrass through in vitro methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002990050034
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  • 6
    Digitale Medien
    Digitale Medien
    Somatic embryogenesis and plantlet regeneration from cell suspension cultures of palmarosa grass (Cymbopogon martinii) (1997)
    Springer
    Plant cell reports 16 (1997), S. 430-434 
    Details
    ISSN: 1432-203X
    Schlagwort(e): Key words Cell suspension culture ; Cymbopogon martinii ; Monocot ; Palmarosa ; Plant regeneration ; Somatic embryogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A cell suspension culture was established from nodal callus of Cymbopogon martinii (Roxb.) Wats in a liquid medium containing Murashige and Skoog (1962) basal salts, vitamins, 100 mg l–1 myo-inositol and 20 g l–1 of sucrose (MS) that was supplemented with 13.6 µM 2,4-dichlorophenoxyacetic acid and 1.15 µM kinetin. An initial inoculum density of 2 × 104 cells ml–1 exhibited optimum cell growth. Calli were obtained 12–15 days after the suspension was plated onto semisolid medium of a similar composition. When calli were transferred to semisolid regeneration medium containing MS + 6.7 µM N 6-benzyl-adenine + 1.15 µM kinetin, somatic embryogenesis and plantlet regeneration occurred after 10–25 days. There was no significant decrease in the regeneration potential of the calli even when the cultures were initiated from 47-week-old cell suspensions. Chromosome counts of cells in suspensions, calli and somatic embryos derived from cultures of different ages revealed the presence of diploids, tetraploids and octaploids. However, the 33 regenerated plants tested were all diploid, indicating that only diploid cells were capable of regeneration in vitro.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01146788
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  • 7
    Digitale Medien
    Digitale Medien
    Somatic embryogenesis and plantlet regeneration from cell suspension cultures of palmarosa grass (Cymbopogon martinii) (1997)
    Springer
    Plant cell reports 16 (1997), S. 430-434 
    Details
    ISSN: 1432-203X
    Schlagwort(e): Cell suspension culture ; Cymbopogon martinii ; Monocot ; Palmarosa ; Plant regeneration ; Somatic embryogenesis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract A cell suspension culture was established from nodal callus ofCymbopogon martinii (Roxb.) Wats in a liquid medium containing Murashige and Skoog (1962) basal salts, vitamins, 100 mg 1−1 myo-inositol and 20 g l−1 of sucrose (MS) that was supplemented with 13.6 μM 2,4-dichlorophenoxyacetic acid and 1.15 μM kinetin. An initial inoculum density of 2 x 104 cells ml−1exhibited optimum cell growth. Calli were obtained 12–15 days after the suspension was plated onto semisolid medium of a similar composition. When calli were transferred to semisolid regeneration medium containing MS + 6.7 μM N 6-benzyl-adenine + 1.15 μM kinetin, somatic embryogenesis and plantlet regeneration occurred after 10–25 days. There was no significant decrease in the regeneration potential of the calli even when the cultures were initiated from 47-week-old cell suspensions. Chromosome counts of cells in suspensions, calli and somatic embryos derived from cultures of different ages revealed the presence of diploids, tetraploids and octaploids. However, the 33 regenerated plants tested were all diploid, indicating that only diploid cells were capable of regeneration in vitro.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01146788
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  • 8
    Digitale Medien
    Digitale Medien
    A variational calculation of the stability of the two centre Frohlich bipolaron
    Amsterdam : Elsevier
    Physics Letters A 195 (1994), S. 105-109 
    Details
    ISSN: 0375-9601
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9601(94)90436-7
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  • 9
    Digitale Medien
    Digitale Medien
    On the formation and stability of the Fröhlich bipolaron in two- and three-dimensional systems (1996)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 849-853 
    Details
    ISSN: 0392-6737
    Schlagwort(e): Polarons and electron-phonon interactions ; Phonon-electron and phonon-phonon interactions
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Summary Within the framework of Rayleigh-Schrödinger perturbation theory the bound state of two electrons in polar crystals is investigated in various dimensional systems. It is found that Fröhlich bipolaron can exist in both two and three dimensions in the strong-coupling region, the binding being stronger in the lower dimension. The stability criterion for the formation of the Fröhlich bipolaron is estimated to yield better results compared to the values quoted in the literature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02457317
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  • 10
    Digitale Medien
    Digitale Medien
    Rapid propagation of lemongrass (Cymbopogon flexuosus (Nees) Wats.) through somatic embryogenesis in vitro (1996)
    Springer
    Plant cell reports 15 (1996), S. 367-370 
    Details
    ISSN: 1432-203X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Somatic embryos induced from callus cultures of lemongrass [Cymbopogon flexuosus (Nees) Wats.] on Murashige and Skoog medium supplemented with 5 mg/l of 2,4-D, 0.1 mg/l of NAA and 0.5 mg/l of Kn developed into plantlets when plated on a medium supplemented with 3 mg/l of BA, 1 mg/l of GA3 and 0.1 mg/l of NAA. The regeneration potential of callus was retained for more than 2 years on the nutrient medium supplemented with comparatively lower levels of growth regulators (2,4-D at 2 mg/l, NAA at 0.1 mg/l and Kn at 0.25 mg/l). Approximately 30–35 plantlets were produced after two months of culture per 100 mg of callus inoculated. Regenerants were transplanted into soil and transferred to the field for assessment of various morphological and biochemical characteristics. The results of 1 year of field trials showed that plants derived from somatic embryoids were more uniform in all the characteristics examined when compared with the field performance of plants raised through slips by standard propagation procedures. Thus, a procedure has been developed for high frequency long term plant production of lemongrass through in vitro methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00232373
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