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  • 1
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A one year field study of four stations in the Gulf of Bothnia during 1991 showed that the biomass was ca. two times, and primary productivity ca. four times, lower in the north (Bothnian Bay) than in the south (Bothnian Sea) during the summer. Nutrient addition experiments indicated phosphorus limitation of phytoplankton in the Bothanian Bay and the coastal areas in the northern Bothnian Sea, but nitrogen limitation in the open Bothanian Sea. A positive correlation between the phosphate concentration and the production/biomass ratio of phytoplankton was demonstrated, which partly explained the differences in the specific growth rate of the phytoplankton during the summer. Differences in photosynthetic active radiation between the stations also showed a covariation with the primary productivity. The relative importance of nutrient or light limitation for photosynthetic carbon fixation could not, however, the conclusively determined from this study. Marked differences in phytoplankton species composition from north to south were also observed. The number of dominating species was higher in the Bothnian Sea than in the Bothnian Bay. The distribution of some species could be explained as due to nutrient availability (e.g. Nodularia spumigena, Aphanizomenon sp.), while salinity probably limits the distribution of some limnic as well as marine species. The potentially toxic phytoplankton N. spumigena, Dinophysis acuminata and Chrysochromulina spp. were common in the Bothnian Sea but not in the Bothnian Bay. The pico- and nanoplankton biomass during late summer was higher than previously reported due to a revised carbon/volume ratio.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Studies in Educational Evaluation 18 (1992), S. 23-36 
    ISSN: 0191-491X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Education
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Studies in Educational Evaluation 18 (1992), S. 23-36 
    ISSN: 0191-491X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Education
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 163 (1949), S. 841-841 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN a study of the effects of ions on the rat diaphragm, it has been found that denervated preparations are much more sensitive to potassium than the normal diaphragm stimulated through its nerve. A dose of potassium, for example, exposure to a concentration of 0·08 per cent in Krebs's solution, ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Arthroskopie 12 (1999), S. 268-273 
    ISSN: 1434-3924
    Keywords: Schlüsselwörter Knie ; Arthroskopie ; Arthrolyse ; Judet-Operation ; Key words Knee ; Arthroscopy ; Arthrolysis ; Judet operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: The development of minimally invasive and arthroscopic techniques as well as early rehabilitation has brought a significant increase in the functional outcome of joint mobility following knee surgery. Despite this fact, surgeons are still being confronted with an increasing number of knee operations in patients suffering from limited knee motion or arthrofibrosis. Several surgical techniques to improve knee mobility can be performed, depending on the amount and characteristics of immobility. Indications for arthoscopic or open surgery should be based on an algorhithm. The goal of this paper is to present this algorhithm and discuss the limitations of arthroscopic procedures. In seven patients with an average range of motion of 42.8° preoperatively, an open procedure had to be performed. The average range of motion intraoperatively was 115° and 97.8° at follow-up after 22.4 months.
    Notes: Obwohl verfeinerte, minimalinvasive Operationstechniken sowie neue Implantate in der Kniegelenkchirurgie zumeist eine frühfunktionelle Nachbehandlung ermöglichen und eine langfristige Ruhigstellung vermeiden, ist man auch sicher aufgrund der steigenden Zahl an Eingriffen in der täglichen Praxis immer wieder mit Patienten mit störenden Bewegungseinschränkungen des Kniegelenks konfrontiert. Dauer und Art der Gelenksteife, Ausmaß und Sitz des Bewegungshindernisses sowie Umfang der Funktionseinschränkung indizieren zwar die jeweilige Vorgangsweise, die Indikationsstellung gestaltet sich jedoch aufgrund der Komplexität des pathomorphologischen Substrats der Arthrofibrose problematisch. Diese Arbeit versucht anhand der Empfehlungen anderer Autoren sowie eigener Erfahrungen nach 7 offenen Arthrolysen die Grenzen der arthroskopischen Arthrolyse bzw. die Indikation zum offenen Eingriff aufzuzeichnen. Bei den 7 Patienten wurde die Beweglichkeitsamplitude von präoperativ durchschnittlich 42,8° intraoperativ auf einen Wert von durchschnittlich 115° angehoben, fiel jedoch bei der Nachuntersuchung (im Schnitt nach 22,4 Monaten) auf durchschnittlich 97,8° zurück.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 24 (2000), S. 279-281 
    ISSN: 1432-5195
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé  L’avulsion fracture de l’apophyse tibiale est rare. Sept cas ont été traités entre 1993 et 1998. Dans un cas le traitement était conservateur. Dans les autres cas, une réduction ouverte avec fixation interne a été utilisée. Les résultats après une moyenne de 23 mois étaient bons. Il n’y avait pas de trouble de la croissance.
    Notes: Abstract  Avulsion fractures of the tibial apophysis are rare. Seven cases were treated between 1993 and 1998 in our department. The treatment was conservative in 1 case, in the other 6 open reduction and internal fixation was used. The results after an average of 23 months were good. There were no growth disturbances.
    Type of Medium: Electronic Resource
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