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  • 1
    Electronic Resource
    Electronic Resource
    Flavonoid Glycosides from Betula pubescens and Betula pendula (1986)
    s.l. : American Chemical Society
    Journal of natural products 49 (1986), S. 1155-1156 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50048a045
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  • 2
    Electronic Resource
    Electronic Resource
    Minor Alkaloids from Nicotiana tabacum (1986)
    s.l. : American Chemical Society
    Journal of natural products 49 (1986), S. 1156-1157 
    Details
    ISSN: 1520-6025
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/np50048a046
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ovarian torison: an unusual cause of bilateral pelvic calcifications (1988)
    Springer
    Pediatric radiology 18 (1988), S. 172-173 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ovarian calcification in children is rare, usually unilateral, and in most cases implies tumor involvement. A case of bilateral ovarian torsion with calcification that might mimic neoplasm is presented along with a literature review.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02387567
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  • 4
    Electronic Resource
    Electronic Resource
    Bladder diverticulum associated with ureteral obstruction (1985)
    Springer
    Pediatric radiology 15 (1985), S. 207-208 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A ureter entering a bladder diverticulum almost always has associated vesico-ureteric reflux but rarely obstruction. We present the clinical and radiologic data on a patient with an ectopic ureteral insertion into a bladder diverticulum, with associated obstruction but not vesico-ureteric reflux. Periureteral fibrosis secondary to chronic inflammation is thought to be the underlying cause.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02388616
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  • 5
    Electronic Resource
    Electronic Resource
    Ultrasonographic detection of spontaneous perforation of the extrahepatic bile ducts in infancy (1986)
    Springer
    Pediatric radiology 16 (1986), S. 157-159 
    Details
    ISSN: 1432-1998
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Diagnosis of spontaneous perforation of the bile ducts in infancy depends on the awareness of this rare condition. The purpose of this article is to report a new case of extra hepatic bile duct perforation, review the literature, and describe in detail the ultrasonographic findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02386644
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  • 6
    Electronic Resource
    Electronic Resource
    Numerical studies on cold fronts Part I: Gravity flows in a neutral and stratified atmosphere (1989)
    Springer
    Meteorology and atmospheric physics 40 (1989), S. 150-158 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary We have used a two dimensional version of a nonhydrostatic mesoscale model to simulate atmospheric gravity currents for different thermal stratification. The horizontal and vertical grid increments are chosen such, that the major features of a current like head and elevated nose are resolvable. When the density current propagates into a neutral stratified environment it was found, that frontspeed agrees well with an empirical formula. Also characteristic length scales like depth of the head or height of the following cold air body agree well with observations found in water tank experiments. When a stable atmosphere is adopted, the front moves faster and the generated gravity waves have a significant influence on the atmospheric variables ahead of the current. This results especially in a pressure increase before the front arrives, an effect, which was found in observations, too. Finally, it is shown, that an elevated inversion, embedded in a stable layer, intensifies the vertical velocities and therefore the mesoscale heat flux, which results in a stronger entrainment. For this case a remarkable decrease of front speed is simulated with time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01032455
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  • 7
    Electronic Resource
    Electronic Resource
    Numerical studies on cold fronts Part II: Orographic effects on gravity flows (1989)
    Springer
    Meteorology and atmospheric physics 40 (1989), S. 159-169 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Summary A two-dimensional nonhydrostatic numerical model was used to investigate the behaviour of a cold air gravity current, moving along complex terrain. It is found, that the model with a high horizontal and vertical resolution and with a closure scheme, using the turbulent kinetic energy, is suitable to simulate currents, which have the main features of those found in laboratory experiments. Simulations are presented for different orographic structures (mountain and valley), for varying thermal stratification of the environmental atmosphere (neutral, stable and stable with an elevated inversion) and for different heights of the cold air reservoir. The major effect of a hill on the advance of a gravity current is a reduction of the front speed upstream as well as (even stronger) downstream of the obstacle, where the amount of this decrease depends on thermal stratification. Near surface blocking of the air flow on the windward side occurs for all simulations. However, for small depths of the oncoming cold air, the current cannot surmount the hill and remains on the lee side.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01032456
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  • 8
    Electronic Resource
    Electronic Resource
    Cellular localization of induced human interferon-β mRNA by non-radioactive in situ hybridization (1989)
    Springer
    Histochemistry and cell biology 91 (1989), S. 315-319 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Induced interferon-β (IFN-β) mRNA was localized in human FS-4 fibroblasts by in situ hybridization using biotinylated probes. The hybridization sites were detected by incubation with a nick-translated genomic DNA probe (1.8 kb) via streptavidin-colloidal gold followed by silver contrast enhancement. The positive signals were observed by reflection-contrast light microscopy. IFN-β mRNA was transiently induced by poly r(I):r(C) in fibroblasts 2–4 h after induction. Induction in the presence of cycloheximide and actinomycin D (superinduction conditions) exhibited an enhanced level of IFN-β mRNA with a maximum at 4–8 h. The kinetics of the IFN-β mRNA expression in the cytoplasm as revealed by in situ hybridization proved to be compatible with the results of Northern biotting experiments of total cellular RNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00493007
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  • 9
    Electronic Resource
    Electronic Resource
    Cytoplasmic damage gradients in dendrites after transection lesions (1987)
    Springer
    Experimental brain research 67 (1987), S. 52-60 
    Details
    ISSN: 1432-1106
    Keywords: Dendrite ; Transection ; Trauma ; Serial section ; Damage gradient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ultrastructural changes in the cytoplasm of transected dendrites have been studied with serial section electron microscopy 10 to 12 min after the lesion. Dendrites from large multipolar neurons in mouse spinal monolayer cultures were selected 4 weeks after seeding and cut with a pulsed UV laser microbeam. The data reveal cytoplasmic damage gradients which decrease in severity with distance from the lesion. The damage is expressed primarily in cytoskeletal disruption, the swelling and vacuolation of mitochondria (MC), and the swelling and vesiculation of the endoplasmic reticulum (ER). For a 3–4 μm diameter dendrite lesioned 150 μm from the soma and fixed 10 min after transection, the following results can be reported. (1) The number of microtubules (MT) decreases almost linearly with a slope of 40 MT/10 μm until MT completely disappear 20 μm from the lesion. (2) Neurofilaments (NF) decrease at approximately 50 NF/10 μm, with 20% of these structures still intact at or near the lesion. (3) MC show both gradual and explosive swelling in the damaged process. The onset of these two phases of MC swelling are correlated with the initial and total loss of MT respectively. (4) MT and NF densities in cut dendrites are drastically different from those in control processes and suggest a possible retrograde redistribution of these organelles. (5) Damage from external shockwaves that cause process distortion but not transection results in a less severe but nervetheless similar loss of MT and NF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269452
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  • 10
    Electronic Resource
    Electronic Resource
    The sequence of ultrastructural changes in cultured neurons after dendrite transection (1987)
    Springer
    Experimental brain research 67 (1987), S. 41-51 
    Details
    ISSN: 1432-1106
    Keywords: Trauma ; Neuron ; Culture ; Calcium ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cultured mouse spinal neurons were fixed at three different intervals after dendrite amputation: within the first 15 min, at 2 h and at 24 h. Dendrites were amputated at lesion distance of either 50 μm (31% probability of cell survival) or 100 μm (53% probability of cell survival) from the edge of their perikarya. When fixed within 15 min, operated neurons showed a two-phase gradient of ultrastructural damage which spread from the transection site towards the perikaryon. At 2 h after dendrite amputation all neurons operated close to their perikarya were categorized as either viable, moribund or dead, based on their appearance with phase contrast microscopy. These categories of response to physical trauma corresponded to distinctly different ultrastructural changes. Moribund neurons were filled with membrane-bound vesicles which were derived from swollen mitochondria and grossly dilated cisternae of the smooth endoplasmic reticulum. The cytoplasm of dead neurons contained large clear areas and many condensed, dark mitochondria. Both moribund and dead neurons lacked cytoskeletal elements. All of these ultrastructural changes are hypothesized to be the result of an increase in the intracellular concentrations of free calcium. Although evidence of residual mitochondrial swelling was present in some surviving neurons at 24 h, the ultrastructure of others was comparable to that of control cells. Some surviving neurons had terminal swellings at the ends of the severed neurites which were very similar to retraction balls of transected axons after CNS trauma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269451
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