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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 283 (1980), S. 58-60 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Lovelock2 first reported the presence of methyl chloride in the atmosphere at the 1-2 p.p.b. level (1 p.p.b. = 1 part in 109 by volume) and showed that its concentrations were highest in air whose origins were oceanic rather than continental. Measurements in seawater confirmed that the ocean could ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 384 (1980), S. 203-206 
    ISSN: 1432-2013
    Keywords: Nephron epithelia ; Na−K-ATPase ; Aldosterone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aldosterone, when added in vitro to defined nephron segments, dissected from adrenalectomized rabbits, restores the depressed Na+−K+-ATPase activity in the thick ascending limb of the loop of Henle and in the cortical collecting tubule within 1 h of incubation. The direct effect is specific and, as demonstrated for the cortical collecting tubule, dose-dependent. The time course of aldosterone-mediated Na+−K+-ATPase activation is compatible with the conjecture of changes in the enzyme lipid environment.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 179 (1996), S. 245-254 
    ISSN: 1432-1351
    Keywords: Bat ; Orientation ; Vision ; Echolocation ; Cumulative navigation error
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The orientation behaviour of bats (Phyllostomus discolor, Phyllostomidae), flying inside an octagonal “roost-like” chamber (ø: 100cm; h: 150cm) was examined. It has been shown that the bats begin turning manoeuvres during flight by turning their head towards the direction they intend to proceed to. During early phases of the flights, cumulative navigation errors were evident, indicating that endogenous spatial information plays a major role in the orientation of the bats. During later phases of the flight this error is diminished again. So it can be concluded that the bats start to use exogenous spatial information for orientation while approaching the target. In order to investigate the relative importance of vision, echolocation and endogenous spatial information for approaching the roost, the landing lattices inside the test arena were changed for non-grid dummies. We found that: 1. combined visual and endogenous information are more important than echoacoustical cues, 2. the bats learned quickly to switch their orientation behaviour in order to get a better performance in avoiding the dummies, 3. the learning performance was influenced by the visual similarity of dummies and the real landing lattice.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 199-202 
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In this paper, a general method for generating quasiperiodic lattices is given. It is based on point multilattices which may be transformed into quasilattices in a new manner. A rounding operation allows the conversion of amassments of points in the multilattice into single points of a perfect quasicrystalline structure. Several examples are given.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In a clinical study the participation of histamine in the allergenic response of patients with food allergy was investigated. The resting levels of gastric tissue and plasma histamines of 10 patients were slightly higher than the respective values of normal volunteers. 5 minutes after local intragastral allergenic provocation a decline of the mucosal histamine content of the allergen-treated area was noticed. Parallel investigations on the mast cell content of the stomach mucosa revealed a parallel decrease of theo-phthaldialdehyde stained cells, whereas the number of toluidine blue stained cells remained unchanged. These data are in accordance with an antigen-induced IgE-dependent liberation of the mast cell histamine stores.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Zeitschrift für Herz-, Thorax- und Gefässchirurgie 13 (1999), S. 133-138 
    ISSN: 0930-9225
    Keywords: Schlüsselwörter Computertomographie – Thorax – Interventionen – Schneid-Saug-Biopsie ; Key words Computer tomography – thorax interventions – carve-suction biopsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Problem: An investigation into CT-controlled carve-suction biopsy for a histological clarification of indefinite intrathoracic masses. Materials and Method: 143 CT-controlled interventions were performed on 102 patients. For histological evaluation purposes, tissue was taken under application of the carva-suction biopsy method (16–18 gage). The lesions with a diameter of 5–70 mm were located in the mediastinum (25%), were close to the thoracic wall/pleural (40%) and intrapulmonary (35%). Results: 92.2% (94/102) of the interventions provided histologically utilizable material in at least one biopsy specimen. The clinical suspected diagnosis was confirmed 78 times (76.5%), while a different discase was evident 16 times (15.7%). In 8 cases, a diagnosis was not possible (7.8%). The total complication rate was 21.6%. The following were observed: 18 pneumothoraxes, 2 hemothoraxes, and 2 patients who demonstrated a hemoptysis. In 4/102 patients (3.9%) complications arose which had to be treated therapeutically. Two-sided complications were not observed. Conclusions: The CT-controlled carve-suction biopsy can be employed histologically to clarify indefinite intrathoracic findings with a high degree of certainty and justifiable complication rates. In addition to this, the minimally invasive procedure helps to reduce costs.
    Notes: Zusammenfassung Fragestellung: Bewertet wird die CT-gesteuerte Schneid-Saug-Biopsie zur histologischen Abklärung unklarer intrathorakaler Raumforderungen. Material und Methode: Bei 102 Patienten wurden 143 CT-gesteuerte Interventionen durchgeführt. Zur histologischen Beurteilung wurde Gewebe in Schneid-Saug-Biopsie-Technik (16–18 Gage) entnommen. Die Läsionen waren 5–70 mm groß, 25% lagen mediastinal, 40% thoraxwandnah/pleural und 35% intrapulmonal. Ergebnisse: 92,2% (94/102) der Interventionen erbrachten in mindestens einer entnommenen Gewebeprobe histologisch verwertbares Material. Die klinische Verdachtsdiagnose wurde 78mal (76,5%) bestätigt, 16mal (15,7%) wurde eine andere Erkrankung nachgewiesen. 8mal ließ sich keine Diagnose stellen (7,8%). Die Komplikationsrate betrug 21,6% (18 Pneumothoraces, 2 Hämatothoraces und 2 Patienten mit Hämoptoe). Bei 4/102 Patienten (3,9%) traten therapiebedürftige Komplikationen auf. Schlußfolgerungen: Mit der CT-gesteuerten Schneid-Saug-Biopsie lassen sich unklare intrathorakale Befunde mit hoher Treffsicherheit und vertretbaren Komplikationen abklären.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Applied microbiology and biotechnology 45 (1996), S. 257-262 
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Eight bacterial isolates from enrichment with 2,4,6-trichlorophenol (TCP) as sole carbon source were tested for their potential to degrade prochloraz. None of them could grow on prochloraz. Strain C964, identified as Aureobacterium sp., effectively reduced the fungitoxic activity of prochloraz in a bioassay and degradation was confirmed by HPLC. Two other isolates, strain C611 and C961, using TCP as a carbon source, belong to the β subclass of the proteobacteria and presumely degrade TCP via 2,4-dichlorohydroquinone and hydroxyhydroquinone as indicated by oxygen-consumption tests.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Experiments in fluids 20 (1995), S. 134-135 
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract For measuring air velocities in swirling flows a differential pressure probe of small axial length was developed. The determination of the velocity is based on measuring the difference between the stagnation pressure and the base pressure of a circular disk whose surface is perpendicular to the main flow direction.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Experiments in fluids 20 (1995), S. 134-135 
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract For measuring air velocities in swirling flows a differential pressure probe of small axial length was developed. The determination of the velocity is based on measuring the difference between the stagnation pressure and the base pressure of a circular disk whose surface is perpendicular to the main flow direction.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Der Hautarzt 47 (1996), S. 763-766 
    ISSN: 1432-1173
    Keywords: Schlüsselwörter Malakoplakie ; Kutane Manifestation ; Michaelis-Gutmann-Körperchen ; Psoriasis vulgaris ; Key words Malakoplakia ; Cutaneous manifestation ; Michaelis-Gutmann-bodies ; Psoriasis vulgaris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A 58 year old patient suffering from psoriasis vulgaris had typical erythematous, scaly plaques for 20 years. In addition, an erosive, therapy-resistant plaque was found in the perianal region. A biopsy was taken to exclude malignancy; it showed intracytoplasmic Michaelis-Gutmann-bodies as a marker for malakoplakia, which rarely occurs in the skin. In further electron microscopic investigation, intracytoplasmatic bacteria could be demonstrated. An underlying malignancy or chronic renal insufficiency with immunosuppression were not found in this patient; both are often associated with malakaplakia.
    Notes: Zusammenfassung Es wird über einen 58jährigen Patienten berichtet, bei dem seit 20 Jahren rezidivierend eine Psoriasis vulgaris mit typischen erythemato-squamösen Plaques an den Prädilektionsstellen besteht. Desweiteren fand sich perianal ein seit ca. 5 Jahren bekannter, therapieresistenter und teils erodierter Plaque. Die zum Ausschluß eines malignen Prozesses durchgeführte Probebiopsie ergab die seltene kutane Manifestation einer Malakoplakie durch den Nachweis der typischen intrazytoplasmatischen Michaelis-Gutmann-Körperchen sowie durch elektronenmikroskopisch nachweisbare intrazytoplasmatische Bakterien. Ein Tumorleiden oder eine Niereninsuffizienz mit entsprechender Immunsuppression, als häufig beobachtete Grunderkrankung der ätiopathogenetisch bisher nicht geklärten Malakoplakie, konnten bei dem hier vorgestellten Fall ausgeschlossen werden.
    Type of Medium: Electronic Resource
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