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  • 1995-1999  (4)
  • 1990-1994  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Treatment of fractures and dislocations of the thoracic and lumbar spine by fusion and Harrington instrumentation (1995)
    Springer
    Archives of orthopaedic and trauma surgery 114 (1995), S. 100-102 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Thirty-three patients with fractures of the thoracolumbar spine were treated by fusion and Harrington instrumentation after early reduction and stabilisation by postural reduction or halo-bifemoral traction. The rod-long-fuse-short technique was used. Postoperatively, all patients were mobilised with an external support. The mean follow-up was 6 years (range 1–13 years). Twenty-eight patients were pain-free, three patients needed sporadic pain medication. One patient was not working due to pain in his leg. One patient had constant pain. Twenty-three patients returned to work. The mean kyphosis increased from 8° postoperatively to 13° at follow-up.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422835
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  • 2
    Electronic Resource
    Electronic Resource
    Ossification in the patellar tendon and patella alta following sports injuries in children (1993)
    Springer
    Archives of orthopaedic and trauma surgery 112 (1993), S. 157-158 
    Details
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two patients with sleeve fractures of the patella and tibial tuberosity respectively are described. Our two cases demonstrate that the diagnosis can be difficult; patella alta and ossification in the patellar tendon are complications of conservative treatment. Early diagnosis and operative reduction and fixation are mandatory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00449996
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  • 3
    Electronic Resource
    Electronic Resource
    Increased chlorine dioxide over Antarctica caused by volcanic aerosols from Mount Pinatubo (1993)
    [s.l.] : Nature Publishing Group
    Nature 363 (1993), S. 245-248 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Aerosols from Mount Pinatubo were transported to the Antarctic stratosphere mainly after October 1991, following the spring break-up of the polar vortex6. A period of particular interest is the polar autumn of the following year (March to April 1992) before polar stratospheric clouds are likely to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/363245a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The case against a massive black hole at the Galactic Centre (1992)
    [s.l.] : Nature Publishing Group
    Nature 359 (1992), S. 131-132 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It has been argued that the patchy and asymmetric distribution of IRS16 components with respect to SgrA* is inconsistent with the short orbit times in the near vicinity of a massive black hole4. More recent observations reveal that IRS16 consist of about 20 very luminous blue stars3 instead of 100 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/359131a0
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  • 5
    Electronic Resource
    Electronic Resource
    More on modified dynamics (1993)
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 25-25 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sir — Lindley's balanced comment1 on the standing of 'modified dynamics' (MOND)2 as an alternative to dark matter should bring the issue closer to the focus of attention. We would like to clarify a few points. MOND is not just a modification of the inverse distance square law of gravity. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/362025a0
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  • 6
    Electronic Resource
    Electronic Resource
    Hepatobiliary excretion of cysteinyl leukotrienes in three experimental models of acute hepatic injury (1996)
    Springer
    Inflammation research 45 (1996), S. 519-523 
    Details
    ISSN: 1420-908X
    Keywords: Leukotrienes ; Streptozotocin ; Estradiol ; Lipopolysaccharide ; Galactosamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The acute phase response to chemically-induced organ damage involves inflammation and the production of leukotrienes. The liver ordinarily takes up, metabolizes and excretes into bile cysteinyl leukotrienes, but the effect of hepatic injury on these processes is unknown. The hepatic uptake and biliary excretion of LTC4 was studied in male Sprague-Dawley rats after exposure to either streptozotocin (45 mg/kg iv 30 days before experimentation), estradiol-17 β-valerate (1mg/kg sc once a week for 3 weeks) or lipopolysaccharide/d-galactosamine (33 μg/kg ip; 300 mg/kg ip at 6 h and 3 h, respectively, before experimentation). Acute liver injury is produced by these treatment paradigms. Glucose concentrations and activities of several marker enzymes in plasma were measured to demonstrate hepatic injury. Biliary excretion of3H-LTC4 was similar to normal control rats in the three types of acute liver injury. Bile flow rates after3H-LTC4 injection were reduced in lipopolysaccharide-pretreated rats and increased in estradiol-treated animals. Total biliary excretion of leukotrienes was not altered in any disease group. Thus, these models of acute hepatic injury do not appear to influence the hepatobiliary clearance of leukotrienes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311089
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  • 7
    Electronic Resource
    Electronic Resource
    Mass discrepancies in galaxies: dark matter and alternatives (1990)
    Springer
    The astronomy and astrophysics review 2 (1990), S. 1-28 
    Details
    ISSN: 1432-0754
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Neutral hydrogen line observations of the extended rotation curves of spiral galaxies imply that there exist significant discrepancies between the luminous and dynamical mass beyond the bright optical discs. This means either that galaxies contain significant quantities of non-luminous matter (matter with a mass-to-light ratio very much higher than that of ordinary stars), or that the law of gravity on the scale of galaxies is not the usual Newtonian inverse square law. Attempts to account for the observed discrepancy in the context of these two explanations are reviewed here with emphasis given to the second and less conventional alternative. It is argued that the standard picture of spiral galaxy halo and disc formation in the context of cold dark matter cannot account for the observed systematics of the discrepancy — notably rotation curves which are seen to be flat and featureless from the bright inner regions where the visible matter dominates the dynamics (in some cases overwhelmingly) to the outer regions where the dark halo dominates. It is demonstrated that in those galaxies with well-observed rotation curves, the discrepancy apparently appears below a critical acceleration. Any dark matter explanation of the discrepancy must account for this fact. Moreover, this would also eliminate empirically motivated modifications of Newton's law in which the deviation from 1/r occurs beyond a fundamental length scale. The suggestion by Milgrom in which the force law becomes essentially 1/r below a critical acceleration (MOND) can account for most of the observed systematics of galaxy rotation curves and, significantly, leads to the observed luminosity-velocity relationship in spiral galaxies (the Tully-Fisher law). Generally covariant theories of gravity which predict this phenomenology in the weak-field limit are described. Although there is not yet a theory which obviously meets all of the requirements for a physically viable alternative to dark matter, a generalized scalar-tensor theory of the form suggested by Bekenstein (phase coupling gravitation) is the currently leading candidate and has the advantage of being testable locally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00873540
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  • 8
    Electronic Resource
    Electronic Resource
    Production of DMSP and DMS during a mesocosm study of an Emiliania huxleyi bloom: influence of bacteria and Calanus finmarchicus grazing (1996)
    Springer
    Marine biology 126 (1996), S. 609-618 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We investigated the influence of bacteria and metazooplankton on the production of dimethylsulfoniopropionate (DMSP) and dimethylsulfide (DMS) during blooms of Emiliania huxleyi (Lohmann) Hay and Mohler in seawater mesocosms. The phytoplankton succession was marked by the rapid collapse of an initial Skeletonema costatum (Greville) Cleve bloom followed by a small E. huxleyi bloom. The collapse of the diatom bloom was accompanied by an increase in concentrations of dissolved DMSP (DMSPd) and bacterial abundance and activity (as determined by the thymidine incorporation technique). The increase in bacterial activity was followed by a rapid decrease in DMSPd concentrations which remained low for the rest of the experiment, even during the subsequent collapse of the E. huxleyi blooms. The absence of DMSPd and DMS peaks during the declining phase of the E. huxleyi blooms was attributed to the high bacterial activity prevailing at that time. The influence of metazooplankton grazing on DMSP and DMS production was investigated by adding moderate (24 mg dry weight m-3) and high (520 mg dry weight m-3) concentrations of Copepodite Stage V and adults of Calanus finmarchicus to two of four filtered (200 μm mesh net) enclosures during the E. huxleyi blooms. The addition of C. finmarchicus, even in high concentrations, had no apparent effect on the dynamics of E. huxleyi, suggesting that the copepods were not grazing significantly on nanophytoplankton. The addition of copepods in high concentrations favored an accumulation of chlorophyll a and particulate DMSP. These results suggest that copepods were preying on the herbivorous microzooplankton which, in turn, was controlling the biomass of nanophytoplankton. DMS production was also enhanced in the enclosure with maximum metazooplankton biomass, suggesting that the grazing of C. finmarchicus on microzooplankton containing DMSP may contribute to DMS production. These results provide strong support to the emerging idea that bacteria and metazooplankton grazing play a dominant role in determining the timing and magnitude of DMS pulses following phytoplankton blooms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00351328
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  • 9
    Electronic Resource
    Electronic Resource
    HTLV-I antibody studies in villagers in East Sepik Province, Papua New Guinea (1990)
    Springer
    Archives of virology 114 (1990), S. 27-35 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serum samples collected in 1984 during a malariometric survey of two villages in the East Sepik Province of Papua New Guinea were tested for antibodies to HTLV-I. None of the villagers showed any symptoms suggestive of retrovirus infection. Eighteen of the 186 (9.5%) sera tested at that time were found to be positive. Blood samples were subsequently obtained from fifteen of the eighteen positives and subjected to analysis by enzyme-linked immunosorbent assay (ELISA), radioimmuno assay (RIA), radioimmunoprecipitation assay (RIPA), and Western blot (WB). Fourteen of the fifteen gave a positive ELISA response, but none were unequivocally positive by p 24 RIA. All sera tested were reactive togag antigens by WB, but gave “indeterminate” results currently accepted criteria. Notably absent from the WB profiles of all of the study subjects was an antibody response to HTLV-I envelope protein gp 46. It is possible that these antibody responses are directed against a variant of HTLV-I or to a novel retrovirus which possesses core antigens similar to those of HTLV-I but has different envelope antigens. Until a virus is isolated, or the viral genome is identified in infected lymphocytes, the possibility remains that the response may be due to factors unrelated to retrovirus infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01311009
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  • 10
    Electronic Resource
    Electronic Resource
    The prevalence of antibodies to human T-lymphotropic virus type I in different population groups in Papua New Guinea (1993)
    Springer
    Archives of virology 130 (1993), S. 327-334 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Isolation and partial sequencing of human T-lymphotropic virus type I (HTLV-I) variants from inhabitants of Papua New Guinea (PNG) and the Solomon Islands has confirmed the existence of virus infection in Melanesian populations. To determine the geographical distribution of seropositivity to HTLV-I in PNG we have tested 2907 serum and plasma samples collected between 1972 to 1991 from 16 different population groups. Samples were screened using a particle agglutination assay and confirmed by p21e-enhanced Western immunoblot (WB). From a total of 94 screen positive samples run on WB, 56 (60%) were confirmed positive (positive for bothenv andgag products) and 38 (40%) were WB-indeterminate (gag products only). The prevalence of WB-confirmed antibodies to HTLV-I in lowland and island populations ranged from 0 to 5.4%. There were no confirmed antibody positives in the highland populations surveyed. Geographically isolated populations living on the fringes of the highlands ranged in seropositivity from 0.2 to 5.8%. Two of the subjects surveyed gave WB antibody patterns characteristic of HTLV-II rather than HTLV-I infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01309664
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