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  • 1
    ISSN: 1432-2048
    Keywords: Chenopodium ; Cryptochrome ; Elongation growth and light ; Photoreceptor ; Photosynthesis ; Phytochrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The spectral control of hypocotyl elongation in light-grown Chenopodium rubrum L. seedlings has been studied. The results showed that although the seedlings responded to changes in the quantity of combined red and far-red radiation, they were also very sensitive to changes in the quantity of blue radiation reaching the plant. Altering the proportion of red: far-red radiation in broad waveband white light caused marked differences in hypocotyl extension. Comparison of the responses of green and chlorophyll-free seedlings indicated no qualitative difference in the response to any of the light sources used, although photosynthetically incompetent plants were more sensitive to all wavelengths. Blue light was found to act primarily of a photoreceptor which is different from phytochrome. It is concluded that hypocotyl extension rate in vegetation shade is photoregulated by the quantity of blue light and the proportion of red: far-red radiation. In neutral shade, such as that caused by stones or overlying soil, hypocotyl extension appears to be regulated primarily by the quantity of light in the blue waveband and secondarily by the quantity of light in the red and far-red wavebands.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2048
    Keywords: Chenopodium ; Photoperception ; Phytochrome ; Shade avoidance ; Stem extension
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The effects of far-red light given against a background of white light on the stem-extension kinetics of three-week-old, light-grown Chenopodium album seedlings were investigated. Under white light alone, the stems (cotyledon-to-apex) extended almost exactly logarithmically with time. Under these conditions the increase in log [stem length in mm] per hour was approx. 3.7·10-3, equivalent to about 1% per h during both skoto-and photoperiods. Supplementary far-red given throughout each photoperiod massively stimulated extension. The calculated logarithmic extension rate, however, slowly returned to that of the controls, following an initial large increase. This is predicted by a model in which far-red light linearly increases the extension rate of individual internodes which arise at an exponentially increasing rate. The behaviour of the model is also consistent with critical experiments in which far-red was given as a pre-treatment or transiently, as well as with other published data. Far-red stimulation of logarithmic extension rate in successive photoperiods was closely and linearly correlated with calculated phytochrome photoequilibrium. Daily short periods of supplementary far-red were especially potent in accelerating extension; the plants seemed least responsive at the end of the photoperiod.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 361 (1983), S. 753-753 
    ISSN: 1435-2451
    Keywords: Cyclosporin A ; Renal transplantation ; Immunosuppression ; Cyclosporin A ; Nierentransplantation ; Immunsuppression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1982 wurden 75 erwachsene Nierentransplantatempfänger (6mal 3. Transpl., 11mal 2. Transpl.) mit einer Kombination aus Cyclosporin A (CyA) und Prednisolon behandelt. Die CyA Dosierung war 14 mg/kg p.o. in der ersten Woche postop., dann 11 mg/kg in der zweiten und 8 mg/kg als Dauertherapie. Prednisolon wurde hinzugefügt (2,0 mg/kg, schnelle Reduktion auf 0,15 mg/kg). Bei einer Mindestbeobachtungszeit von 4 Monaten ergab sich eine drastische Reduktion der Abstoßungsepisoden auf insges. 22 % der Patienten. Die Transplantatfunktion nach 12 Mon. (act. surv.) was 73 % (keine Ausschlüsse), die Nebenwirkungen gering. Wir halten diese Immunsuppression für die derzeit bestmögliche.
    Notes: Summary In 1982 75 renal transplant recipients (6 third transplants, 11 second transplants) were treated with cyclosporin A (CyA) and prednisolone. The CyA dose was initially 14 mg/kg post operative, reduced to a maintenance dose of 8 mg/kg after 2 weeks. Prednisolone was then added (2.0 mg/kg, fast reduction to 0.15 mg/kg). After a follow-up of at least 4 months we found a dramatic reduction of rejection episodes (22 % of all patients). Graft survival (actual survival) at 12 months was 73 % (no exclusions); side effects were few. We consider this protocol superior to other protocols nreviouslv used.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 349 (1979), S. 537-537 
    ISSN: 1435-2451
    Keywords: Kidney transplantation ; Childhood ; Results ; Nierentransplantation ; Kindesalter ; Ergebnisse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Von insgesamt 400 Nierentransplantationen in Hannover wurden 45 an Kindern im Alter von 2 1/2 –16 Jahren durchgeführt. 2 Patienten erhielten ein 2. Transplantat. Die Nieren wurden in 9 Fallen von einem Elternteil gespendet, 25 Transplantate von einem verstorbenen Spender. Unsere Ergebnisse weisen eine aktualisierte Überlebensrate von 87 % und eine Transplantatfunktionsrate von 57 % nach 5 Jahren auf. Als Todesursache von 4 Patienten, die verstarben, wurde in 3 Fallen eine Sepsis festgestellt. Unter Berücksichtigung dieser Ergebnisse halten wir die Nierentransplantation als ein geeignetes Verfahren zur Behandlung der terminalen Niereninsuffizienz im Kindesalter.
    Notes: Summary Of a total of 400 kidney transplantations performed in Hannover, 45 were carried out in children between the ages of 2 1/2 –16 years. 2 patients received a second transplant. In 9 cases the parents acted as donor and in 35 cases cadaver kidneys were used. Our results show an actualised survival rate of 87 % and a function rate of 57 % after 5 years. 4 patients died postoperatively. The cause of death in 3 cases was sepsis. On the basis of the results obtained as far as survival rate and rehabilitation are concerned we recommend kidney transplantation as the method of treatment of kidney insufficiency also in children.
    Type of Medium: Electronic Resource
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