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  • Springer  (5)
  • American Geophysical Union (AGU)
  • American Meteorological Society (AMS)
  • American Geophysical Union
  • 1980-1984  (5)
  • 1981  (5)
Collection
Publisher
Years
  • 1980-1984  (5)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mycopathologia 73 (1981), S. 29-31 
    ISSN: 1573-0832
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract During a seventeen day period an A. niger fungus ball evolved within a healed tuberculous cavity of a patient. Symptoms were a cough with a chocolate brown expectoration and dyspnea. The patient died and necropsy was performed. Crystals of calcium oxalate were deposited in the cavity lining and in the adjacent tissue of the lung. Fibrosis, mononuclear infiltration and intraalveolar purulent exudate were seen in these tissues. Some small vessels presented recent thrombosis and deposition of calcium oxalate. The bronchus connected with the cavity presented a disrupted epithelial layer, edema, polymorphonuclear infiltration and birefringent crystals. Scattered areas of tubular atrophy, glomerular sclerosis and lymphoid infiltration were seen in the cortex of the kidney. Oxalate crystals were also seen within the renal tubuli.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 24 (1981), S. 399-405 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract It is proposed that the rotational angular momentum of the lower Main Sequence stars determines the intensity of their magnetic spot activity. As a consequence of this feedback coupling, the stellar rotation and the activity decay exponentially by magnetic braking of the induced stellar flare- and wind-activity. Therefore, the Sun should have rotated much faster and must have shown a very enhanced activity in its early history. This strong solar activity in the past could have had influenced the evolution of terrestrial life, and may explain the stagnation of maritime life for about 2×109 yr, the diversification of species during the Cambrian formation, and the land conquest by life in the upper Silurian system.
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  • 3
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The results presented deal with the humoral immune response of golden hamsters to primary experimental infection withD. dendriticum. The development of serum antibodies has been comparatively investigated with three hamster groups (n=43) harbouring different burdens of adult flukes. The mean numbers of parasites were 11, 30, or 130 per animal. Serum antibody response was studied during an observation period of at least 331 and up to 496 days postinfection. For antibody detection the sensitivities of precipitation tests (PTs) (double diffusion test, immuno- and counterimmunoelectrophoresis), of the indirect haemagglutination test (IHAT), the complement fixation test (CFT), and the enzyme linked immuno sorbent assay (ELISA) were compared using aqueous crude fluke antigen and crude egg antigen. CFT and ELISA were most sensitive for the early detection of initial response. Thereafter all the tests employed revealed increasing antibody titres, which in general remained at constant levels and persisted until the end of the observation period with the exception of CF-antibodies. In general fluke antigen was found to be more sensitive than egg antigen. However, in CFT this antigen occasionally has been associated with unspecific inhibition of haemolysis. Comparison of the results shows that ELISA using crude fluke antigen gave the most realistic picture of the actual fluke burden. Also preliminary results on the precipitin response of rabbits (n=3) after primary experimental exposure to different numbers of metacercariae (500, 1,000, and 3,000 per animal respectively) are reported. Employing the above mentioned PTs a persisting antibody response could be demonstrated only after exposure to at least 3,000 infective larvae. The initial response was found on day 63, the observation period was 550 days.
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  • 4
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Nach Röntgenbestrahlung embryonierterCapillaria hepatica-Eier mit 0.5, 1 bzw. 2 Krd war bei den aus den Eilarven nach Infektion vonMastomys natalensis hervorgegangenen weiblichen Nematoden die Eiproduktion zunehmend reduziert. Sie unterblieb nach Bestrahlung mit 3, 4, 5, 10, 30, 50 bzw. 70 Krd. Die Leberinvasionsfähigkeit der Parasiten war nicht beeinträchtigt. Die Infektion vonM. natalensis mit unbestrahlten embryonierten Eiern führte bereits zwischen dem 6. und 8. Tag p.i. zu einem Anstieg der Serum-GLDH-Aktivitäten. Er erreichte in dieser Phase der Infektion die Höchstwerte. Hohe Werte wurden auch nach Beginn der Patenz festgestellt. Die erhöhte Aktivität hielt bis zum Versuchsende am 36. Tag p.i. an. Nach Infektion mit 2,2 bzw. 5 Krd bestrahlten Eiern waren die Aktivitätserhöhungen geringer und traten im Verlauf der Infektion mit 5 Krd bestrahlten Eiern auch verzögert auf. Nach Infektion mit unbestrahlten Eiern ließen sich im indirekten Hämagglutinationstest mit wässrigem Antigenextrakt aus nicht embryonierten Eiern die ersten Antikörper bereits 1 Woche p.i. nachweisen. Die Höchsttiter traten mit Beginn der Patenz auf. Nach anschließendem fast plateauartigem Verlauf setzte etwa mit Beendigung der Eiproduktion ungefähr um die 7. Woche p.i. ein kontinuierlicher Titerabfall ein. Der Antikörpernachweis gelang jedoch bis zum Versuchsende 17 Wochen p.i. — Nach Infektionen mit 2,2 bzw. 5 Krd bestrahlten Eiern gelang der Antikörpernachweis erst später. Die erreichten Höchsttiter waren geringfügig (2,2 Krd) bzw. auffällig (5 Krd) niedriger. Der anschließende Titerabfall führte zur Annäherung an die Werte nicht infizierterM. natalensis. Die Ergebnisse werden vergleichend mit an anderer Stelle mitgeteilten Befunden zur Leberpathohistologie der Capillariasis diskutiert.
    Notes: Abstract X-ray irradiation of embryonatedCapillaria hepatica eggs using 0.5, 1, or 2 Krd resulted in a progressive decrease of egg production of the female nematodes which had developed from irradiated first stage larvae inMastomys natalensis. Egg production did not occur after irradiation with 3, 4, 5, 10, 30, 50, or 70 Krd. The capacity of the parasites to invade the liver was not influenced. Infection ofM. natalensis using unirradiated eggs was followed by an increase of serum-GLDH-activities between days 6 and 8 post infection reaching maximum values in this period of infection. Furthermore high values have been determined after the beginning of patency. Increased activity persisted up to the end of the experiment on day 36 post infection. After infection with eggs which had received 2.2 or 5 Krd the increase of serum-GLDH-activities was decreased and occurred later in the course of infection using 5 Krd irradiated eggs. Antibodies could be demonstrated as early as one week after infection with unirradiated eggs. Employing the indirect haemagglutination test, using an aqueous extract from non-embryonated eggs as antigen, maximum titres occurred at the beginning of patency. After a nearly plateau-like course titres began to drop about 7 weeks p.i., i.e. about the end of egg production by the female worms, but antibodies were still detectable 17 weeks p.i. (end of the observation period). After infection with eggs which had received 2.2 or 5 Krd antibody development was delayed. Maximum titres were some-what (2.2 Krd) or markedly (5 Krd) lower. Thereafter titres dropped to values comparable to those of uninfectedM. natalensis. The results are compared with published reports on the pathohistology of capillariasis.
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  • 5
    Publication Date: 1981-06-01
    Print ISSN: 0165-0807
    Topics: Geosciences , Physics
    Published by Springer
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