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  • 1980-1984  (3)
  • 1970-1974  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 24 (1974), S. 163-166 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Für Planktonuntersuchungen in situ wurden einfache Tanks (ca. 4 m3, 5 m Tiefe) konstruiert, mit denen im Vorhafen von Helgoland während der Sommermonate 1972 und 1973 Versuche bis zu 28 Tagen durchgeführt wurden. 2. Lichtdurchlässige Kombinationsfolien aus Polyamid und Polyäthylen erwiesen sich für die an diesem Standort vorkommenden mechanischen Belastungen als geeignet. 3. Für eine kontinuierliche Durchmischung des Tankinhalts wurde ein Rührwerk entwickelt. Alle mit dem Tankinhalt in Berührung kommenden Teile waren aus physiologisch unbedenklichem Kunststoffmaterial gefertigt. 4. Die Tanks eignen sich für Simultanversuche, wie in Versuchen mit Monokulturen gezeigt werden konnte.
    Notes: Abstract For studies of in situ interactions between plankton and ambient water, simple, cylindrical, 5 m deep translucent-foil tanks were constructed using polyamide and polyethylene (layers 30 and 100 μm, respectively, with polyamide layer outside). The tanks were suspended in the water by metal frames fixed to a buoy. The whole construction was anchored in an outer basin of the harbour of Helgoland, N. Sea, and was exposed to tides and waves generated by winds of up to 6 Bft (Beaufort scale). Even under these conditions the construction and its material allowed experiments lasting 2 weeks and longer, during the summer months of 1972 and 1973. The banks' volume, of about 4 m3 each permits experiments with naturally occurring concentrations of nutrients and organisms and large sampling volumes for the determination of trace components. In this way, natural plankton populations in 1972, and monocultures of different diatom species in 1973 were investigated. Under these conditions, different monocultures developed almost identically.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 345 (1973), S. 347-351 
    ISSN: 1432-2013
    Keywords: Rabbit Brain ; γ-Amino Butyric Acid ; Ammonia ; Hypoxia ; Ischaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The contents of γ-amino butyric acid (GABA) and NH3 were measured in rabbit brains frozen in situ in liquid oxygen. Determinations of GABA were performed by use of an amino acid analyzer. Mean values obtained under normal conditions were for GABA 1.14 and for NH3 0.27 μmol/g fresh weight. During 30 and 60 min of hypoxia (respiration with 4% O2, 5% CO2, 91% N2) the concentration of GABA increased to 1.38 and 1.62 μmol/g, while NH3 rose to 0.62 and 0.95 μmol/g, respectively. After 20 min of ischaemia the mean values for GABA and NH3 were found to be 2.14 and 0.95 μmol/g, respectively.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 75 (1973), S. 187-201 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Unter artefiziellen unspezifischen Spondylitiden sind solche zu verstehen, die durch wirbelsäulennahe Eingriffe, durch diagnostische Maßnahmen, vor allem Punktionen, und auf dem Wege über eine Operationsinfektion zumeist bei Bandscheibenvorfalloperationen entstehen. Sie sind abzugrenzen von der hämatogenen Osteomyelitis. Die Besonderheiten des klinischen und röntgenologischen Ablaufes werden geschildert, vor allem auch die Beteiligung der Zwischenwirbelscheiben und die Destruktionen der benachbarten Wirbelkörperdeckplatten des betroffenen Wirbelsegmentes. Auf die Wichtigkeit der zeitlichen Abläufe in klinischer Hinsicht bis zum Manifestwerden der röntgenologischen Veränderungen wird hingewiesen, die im Endergebnis günstige Prognose, vor allem wenn eine Verblockung, d. h. Spondylodese eintritt, betont. Die Ausbreitung unter dem vorderen Längsband über mehrere Segmenthöhen hin ist ein besonderes Verlaufsbild. Abschließend wird auf die Therapie, meist konservativ, evtl. Herdausräumung verwiesen und auf die Möglichkeit, evtl. durch gezielte entzündliche Prozesse das günstige Ergebnis einer Wirbelverblockung zu erzeugen, eingegangen.
    Notes: Summary Arteficial unspecific spondylitis is meaning such, which arise during operation in the neighbourhood of the vertebral column, by diagnostic procedures — mostly punctures — and consecutively after an operativ infection — especially by the operativ treatment of intervertebral disk-prolapse. This spondylitis must be delimited from haematogenous osteomyelitis. The clinical and radiological particularities during their progress are presentated, especially the participation of the intervertebral disks and the destructions of neighbour vertebral surfaces. The clinical development till to the manifestation of the radiological changes is demonstrated, and the favourable prognosis is emphasized, when a vertebral fusion (spondylodesis) takes place. The propagation under the anterior longitudinal ligament to other vertebral segments represents clinically a particularity. The treatment is mostly conservativ; the remove of isolated localisations and/or the possibility to obtain a spondylodesis through aimfull inflammatory processes are also mentioned.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Energy-energy-correlations (EEC) have been measured with the JADE detector at c.m. energies of 14 GeV, 22 GeV and in the region 29 GeV〈E cm〈36 GeV. Corrected results are presented of EEC and their asymmetry, which can be directly compared to theoretical predictions. At 〈E cm〉=34 GeV a comparison with second order QCD predictions yields good agreement for the string model fragmentation resulting in a value of the strong coupling constant α s =0.165±0.01 (stat.). The independent fragmentation models, which yield values of α s between 0.10 and 0.15 depending on the treatment of energy and momentum conservation and of the gluon splitting, do not provide a satisfactory description of the data over the full angular range.
    Type of Medium: Electronic Resource
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