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  • 1
    Electronic Resource
    Electronic Resource
    The effects of calcium channel blockers on random skin flap survival in the pig model (1991)
    Springer
    European journal of plastic surgery 14 (1991), S. 3-6 
    Details
    ISSN: 1435-0130
    Keywords: Skin flap ; Calcium channel blockers ; Ischemia ; Animal models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study was designed to evaluate the influence of two calcium channel blockers, verapamil and nifedipine, on skin flap survival. These agents were selected because they inhibit the passage of calcium through calcium selective channels in the plasma membrane, thereby blocking calcium mediated electromechanical coupling in contractile tissue and resulting in peripheral arterial vasodilation. Three groups of pigs were used in this study. All skin flaps in this study were 3 cm wide and 12 cm long. The first group (10 flaps) served as controls with no pharmacologic manipulations. Pigs in group II (15 flaps) received verapamil (80 mg orally, three times a day) for 7 days postoperatively. Pigs in group III (15 flaps) received nifedipine (10 mg orally, three times a day) for 7 days postoperatively. Statistical analysis of the results demonstrated that both verapamil and nifedipine resulted in significant enhancement of skin flap survival. The increased survival of the skin flaps produced by nifedipine as compared to verapamil was statistically significant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585579
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Carbon Dioxide Laser Resurfacing of Rhytides and Photodamaged Skin (1998)
    Springer
    Lasers in medical science 13 (1998), S. 232-241 
    Details
    ISSN: 1435-604X
    Keywords: Keywords: CO2 laser, Laser treatment; Rhytides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Physics , Technology
    Notes: Abstract. Carbon dioxide (CO2) laser resurfacing has been used as a method to treat rhytides and photodamaged skin. This laser offers several advantages over previously utilised modalities but its use has several inherent risks. This article will review important aspects of CO2 laser resurfacing including laser-skin interactions, patient selection, effective pre- and post-operative regimens and potential complications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s101030050002
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Seed coat structure and dormancy (1992)
    Springer
    Plant growth regulation 11 (1992), S. 201-209 
    Details
    ISSN: 1573-5087
    Keywords: Seed coat structure ; dormancy ; permeability ; Dichrostachys cinerea ; natural dormancy-breaking factors ; inhibitors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An understanding of dormancy mechanisms is of ecological and economic importance. Identification of the level at which dormancy is imposed appears to be species specific. The variation brought about by this therefore requires that developmental studies be included in seed coat dormancy experiments. In most cases, a site of permeability can be identified during the developmental process, and this information can be utilized later to remove dormancy. Under natural conditions, the removal of seed coat dormancy requires the interaction of a number of ecological and physiological dormancy-breaking cues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024559
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The uptake, transport and metabolism of the bioregulator 2-(3,4-dichlorophenoxy) ethyldimethylamine in guayule (1987)
    Springer
    Plant growth regulation 5 (1987), S. 25-39 
    Details
    ISSN: 1573-5087
    Keywords: Parthenium argentatum ; rubber production ; bioregulator ; uptake ; transport ; metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The bioregulator 2-(3,4-dichlorophenoxy) ethyldimethylamine was applied to five-month-old summer and winter guayule plants. Uptake of this molecule depended on the presence of viable trichomes and a well-developed cuticle, in the leaves. Winter plants absorbed the bioregulator more successfully than summer plants. The stem proved to be an active absorption site in young plants. Six days after bioregulator application, transport of the molecule was restricted to the lower stem in summer plants, and stem and leaves in winter plants. Transport was governed by the availability and development of conduits. The intact molecule was recovered two days after application but was not detectable after 4 and 6 days indicating that it is metabolized fairly rapidly. The significance of these findings is discussed in terms of the use of bioregulators to stimulate rubber production in guayule plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00035017
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    The role of natural agents in the removal of coat-imposed dormancy in Dichrostachys cinerea (L.) Wight et Arn. seeds (1994)
    Springer
    Plant growth regulation 14 (1994), S. 51-59 
    Details
    ISSN: 1573-5087
    Keywords: bush encroachment ; Dichrostachys cinerea ; dormancy ; germination ; impermeability ; natural factors ; seed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstracts Dichrostachys cinerea seeds are impermeable to water and do not germinate readily. The plant, however, contributes to a bush encroachment problem, minimising visibility in wildlife reserves and reducing the area available for grazing. Natural dormancy-breaking conditions must therefore exist, promoting the germinability of these normally dormant seeds. Diurnal temperature fluctuations (50°C/15°C), especially when combined with moisture were found to break dormancy. High temperatures, such as those generated by fire, destroyed seeds. Seeds ingested by herbivorous browsers such as nyala, became permeable. Seed burial for 48 weeks, was a more effective treatment than storage in promoting permeability. Distribution of D. cinerea will therefore be restricted to areas in which these conditions or factors occur. Seeds germinated optimally at 30δC in the laboratory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024141
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Chemical composition of pods and seeds of Dichrostachys cinerea as a basis of seed dispersal (1994)
    Springer
    Plant growth regulation 14 (1994), S. 273-277 
    Details
    ISSN: 1573-5087
    Keywords: Key words ; carbohydrates ; Dichrostachys cinerea ; fatty acids ; lipids ; nutritive value ; palatability ; pods ; protein ; seed bank ; seeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The occurrence of very few seeds of Dichrostachys cinerea in the soil seed bank prompted the present study as to why animal browsers and seed predators should select the infructescence of this plant. The preferential and extensive browsing of this indehiscent legume is apparently not due to any exceptional nutritive value of the pods and seeds. However, it is probably the strong rich aroma of the infructescence which initially attracts animals to this food source. The structure of the infructescence, ensures that upon location a large number of pods and seeds are consumed. Ingestion of the pods will provide fibre, lipid, fatty acids, carbohydrates, amino acids, nitrogen and protein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00024803
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of ethylene on RNA and protein synthesis in germinating Manketti (Ricinodendron rautanenii Schinz) seeds (1988)
    Springer
    Plant growth regulation 7 (1988), S. 227-236 
    Details
    ISSN: 1573-5087
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Amino acid uptake and protein synthesis were monitored in the embryonic axis, cotyledons and endosperm of manketti seeds (Ricinodendron rautanenii Schinz) during imbition, dormancy and dormancy-breaking by ethylene. Protein synthesis increased in all tissues within 48 h of imbibition and was strongly inhibited by cycloheximide and actinomycin D. No marked increase in protein synthesis was observed following ethylene treatment suggesting that qualitative rather than quantitative changes in protein synthesis were associated with dormancy-breaking. Seed germination was relatively insensitive to treatment with actinomycin D in marked contrast to the inhibition observed with cycloheximide. It is suggested that dormancy-breaking by ethylene may require protein synthesis but not DNA-dependent RNA synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037632
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    Paper (German National Licenses)
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