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  • 1980-1984  (4)
  • Sitka spruce  (2)
  • Acquisition  (1)
  • Complex cyanotic heart disease  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Impaired acquisition of an operant response in young rats depleted of brain dopamine in neonatal life (1983)
    Springer
    Psychopharmacology 79 (1983), S. 115-119 
    Details
    ISSN: 1432-2072
    Keywords: Dopamine ; Acquisition ; Brain lesions ; 6-Hydroxydopamine ; Neonatal rat ; Operant behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In an attempt to examine the ability of brain dopamine (DA) depletion to alter learning ability in the developing rat, the rate of acquisition of a positively reinforced lever pressing response was examined in rats during days 30–45 of life following treatment with desmethylimipramine (DMI, 20 mg/kg IP) and 6-hydroxydopamine (6-OHDA, 35 μg intraventricularly) at 3 and 6 days of age, respectively. The 6-OHDA treatment produced a 40%–70% reduction of brain DA without altering growth rate, water intake, or locomotor activity. On the average, water-deprived control rats achieved the criterion for acquisition (50 reinforced lever presses/h) on a fixed-ratio 1 schedule of water reinforcement after 3.1±0.5 sessions (mean ± SEM). In contrast, nearly one-fourth of the DMI + 6-OHDA-treated rats failed to acquire the response after 16 sessions and the remaining 6-OHDA-treated rats required more than twice as long as controls for acquisition (7.8±0.7 sessions). These results suggest that brain DA depletion in neonatal life can impair the acquisition of an operant response during development and that this deficit is independent of changes in growth rate or locomotor activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00427796
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Complex cyanotic congenital heart disease correctable with an intra-atrial baffle (1982)
    Springer
    Pediatric cardiology 2 (1982), S. 333-338 
    Details
    ISSN: 1432-1971
    Keywords: Dextrocardia ; Polysplenia ; Complex cyanotic heart disease ; Surgery ; Intra-atrial baffle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The clinical, angiocardiographic, and surgical findings in a cyanotic child with dextrocardia, L-loop, laterally inverted but otherwise normally related great arteries, and situs ambiguus are described and compared with other similar cases. Electrocardiographic, echocardiographic, and angiographic data are reviewed, and thesegmental approach to diagnosis is stressed. Both systemic and pulmonary veins returned to the right-sided atrium. Blood then passed either through the mitral valve to the morphologically left ventricle and to the aorta or through an atrial septal defect to a small left-sided atrium, right ventricle, and pulmonary artery. Total correction was undertaken with an intra-atrial baffle to direct pulmonary venous return to the morphologically right ventricle and systemic venous return to the right ventricle. The subpulmonic stenosis was alleviated with an outflow patch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02426984
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of mycorrhizal inocula on the growth of Sitka spruce seedlings in different soils (1983)
    Springer
    Plant and soil 71 (1983), S. 313-317 
    Details
    ISSN: 1573-5036
    Keywords: Forest ; Glasshouse conditions ; Mycorrhizal fungi ; Nursery ; Seedling response ; Sitka spruce
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Different mycorrhizal fungi were tested for their effectiveness in promoting growth of Sitka spruce seedlings, in two contrasting soils, in a glasshouse pot experiment. In nursery soil,Laccaria amethystina significantly improved growth of seedlings in comparison toL. laccata. Seedlings inoculated with a forest isolate ofThelephora terrestris were significantly larger than those inoculated with a nursery isolate when grown in forest soil. The effectiveness ofComplexipes moniliformis in forest soil was poor in comparison to other mycorrhizal fungi. Strains aswell as species of mycorrhizal fungi affect seedling growth differently. These effects are further influenced by soil type.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182669
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Changes in the mycorrhizal status of Sitka spruce following outplanting (1983)
    Springer
    Plant and soil 71 (1983), S. 319-323 
    Details
    ISSN: 1573-5036
    Keywords: E-strain ; Forest ; Nursery ; Replacement ; Sitka spruce ; Thelephora terrestris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Occurrence of mycorrhizal types in 4 forest sites and 4 nurseries was determined by mycorrhizal morphology. In total 25 distinct mycorrhizas were found, of which 14 were formed by identifiable fungi. The frequency of occurrence of the ‘E-strain’ fungus, the dominant nursery mycorrhizal fungus, decreases with the age of the outplanted seedling. Some mycorrhizal types were found in all the mature forest sites examined. The fungusT. terrestris was found on all age groups of Sitka spruce studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02182670
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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