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  • 1
    Electronic Resource
    Electronic Resource
    Clinical chemistry (1983)
    s.l. : American Chemical Society
    Analytical chemistry 55 (1983), S. 202-214 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00256a008
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Passive Transfer of Lambert-Eaton Myasthenic Syndrome in Mice: Decreased Rates of Resting and Evoked Release of Acetylcholine from Skeletal Muscle (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 42 (1984), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Mice were injected for 1–2 months daily with 10 mg immunoglobulin G (IgG) from four patients with Lambert-Eaton myasthenic syndrome (LEMS); control mice were injected with pooled human IgG from normal donors. Gastrocnemius muscles were homogenised for the assay of acetylcholine (ACh), choline acetyltrans-ferase (ChAT), and cholinesterase (ChE). The ACh, ChAT, and ChE contents of gastrocnemius muscles from “LEMS mice” were about the same as the control values, which were 180 pmol, 40 nmol * h−1 (37°C), and 15 μmol * h−1 (37°C), respectively. Hemidiaphragms were treated with an irreversible ChE inhibitor (Soman) and incubated at 20°C for estimation of ACh release. Resting ACh release from experimental muscles was reduced by about 25% (P2 〈 0.05) and the release evoked by 3 s−1 nervous stimulation by 50% (P2 〈 0.05). On the other hand, 50 mM KCl-induced transmitter release was not abnormal in LEMS mice. The findings indicate that IgG antibody from patients with LEMS may bind to nerve terminal determinants that are involved in quantal and nonquantal ACh release.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1984.tb02733.x
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  • 3
    Electronic Resource
    Electronic Resource
    Plasma progesterone levels as an index of ovulation (1983)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 90 (1983), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. Plasma progesterone levels were measured in three groups of untreated women. (1) Nine women with follicle rupture, proved by laparotomy or laparoscopy, had values of ≥40 nmol/l on days 18–24 (days −10—5 from the next period); thus a value of 〈40 nmol/1 should not be taken as evidence of ovulation. (2) Nineteen healthy women with normal menstrual histories had hormone assays on alternate days during one cycle. In five of them all values were 〈38 nmol/1. (3) Forty women had a single progesterone assay on days 20–29 of a conceptual cycle. Eight of them had a level 〈40 nmol/l. Ovulation had certainly occurred in all of them, but it is difficult to assess whether the sample timing was optimal since there was no following menstrual period. Progesterone levels in drug-induced conceptual cycles were in general higher than those in spontaneous pregnancy cycles. Women with luteinization of the unruptured follicle frequently had values of 〉40 nmol/l. Conversely, a secretory endometrium was not uncommon in cycles with values of 〈38 nmol/l.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1983.tb08965.x
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  • 4
    Electronic Resource
    Electronic Resource
    The Disease Spectrum, Epidemiology, and Etiology of Toxic-Shock Syndrome (1984)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Microbiology 38 (1984), S. 315-338 
    Details
    ISSN: 0066-4227
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.mi.38.100184.001531
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  • 5
    Electronic Resource
    Electronic Resource
    Pathogenic bacteria associated with cultured American eels, Anguilla rostrata Le Sueur (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 23 (1983), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: American eels, Anguilla rostrata, obtained from an aquaculture facility in South Carolina were examined for diseases and bacterial pathogens were isolated and identified. During the first year of culture, only a small number of bacterial pathogens and diseases were detected in glass and elver stages. This observation appears to be associated with a natural immunity to disease and/or administering the antibacterial compound, nitrofurazone. There was also a positive correlation between the use of nitrofurazone and the isolation of nitrofurazone resistant strains of Aeromonas hydrophila. A higher incidence of bacterial pathogens and/or disease occurred during the process of culling and in older eels during warmer months. The primary aetiological agent of disease of cultured eels was A. hydrophila. Other potential pathogens isolated included A. salmonicida, Vibrio spp. and Pseudomonas spp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1983.tb02935.x
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  • 6
    Electronic Resource
    Electronic Resource
    The enhancement of resistance of the American eel, Anguilla rostrata Le Sueur, to a pathogenic bacterium, Aeromonas hydrophila, by an extract of the tunicate, Ecteinascidia turbinata (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 7 (1984), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. Extracts of the tunicate Ecteinascidia turbinate were used in preventing Aeromono hydrophila infection in the American eel, Anguilla rostrata. Intraperitoneal injection of the extract 2 days after bacterial challenge was shown to increase dramatically eel phagocytic activity and resistance to disease. Intravenous injection of the extract 2 days post-bacterial injection was shown to increase antibody titres. This study helps to substantiate the possible use of E. turbinata extract in treating eel diseases. The exact nature of its protective effect will be dependent on the time and route of its delivery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1984.tb00936.x
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  • 7
    Electronic Resource
    Electronic Resource
    Comparison of coronal holes observed in soft X-ray and He i 10 830 Å spectroheliograms (1983)
    Springer
    Solar physics 87 (1983), S. 47-56 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare coronal holes observed in solar soft X-ray images obtained with rocket-borne telescopes during 1974 to 1981 with holes observed on nearly simultaneous 10830 Å maps. Hole boundaries are frequently poorly defined, and after 1974 the brightness contrast between the large scale structure and holes appears substantially diminished in both X-rays and 10830 Å. We find good agreement between soft X-rays and 10830 Å for large area holes but poor agreement for mid and low latitude small area holes, which are generally of low contrast. These results appear inconsistent with the popular view that the quiet corona is sharply separated into open magnetic field regions consisting of coronal holes and closed field regions consisting of the large scale structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00151159
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  • 8
    Electronic Resource
    Electronic Resource
    The spatial distribution of 6 centimeter gyroresonance emission from a flaring X-ray loop (1984)
    Springer
    Solar physics 92 (1984), S. 271-281 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare simultaneous high resolution soft X-ray and 6 cm images of the decay phase of an M3 X-ray flare in Hale Region 16413. The photographic X-ray images were obtained on an AS & E sounding rocket flown 7 November, 1979, and the 6 cm observations were made with the VLA. The X-ray images were converted to arrays of line-of-sight emission integrals and average temperature throughout the region. The X-ray flare structure consisted of a large loop system of length ∼ 1.3 arc min and average temperature ∼8 × 106 K. The peak 6 cm emission appeared to come from a region below the X-ray loop. The predicted 6 cm flux due to thermal bremsstrahlung calculated on the basis of the X-ray parameters along the loop was about an order of magnitude less than observed. We model the loop geometry to examine the expected gyroresonance absorption along the loop. We find that thermal gyroresonance emission requiring rather large azimuthal or radial field components, or nonthermal gyrosynchrotron emission involving continual acceleration of electrons can explain the observations. However, we cannot choose between these possibilities because of our poor knowledge of the loop magnetic field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00157251
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  • 9
    Electronic Resource
    Electronic Resource
    X-Ray and microwave observations of active regions (1983)
    Springer
    Solar physics 85 (1983), S. 267-283 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We compare coordinated, high spatial resolution (2–3 arc sec) observations at 6 cm and in soft X-rays with photospheric magnetograms and optical filtergrams of two active regions. The correspondence of the brightest centimetric components in these regions with coronal loops, sunspots and pores, chromospheric structures and the photospheric magnetic field was determined. Our principal results are: The association between the microwave components and coronal X-ray and photospheric magnetic field structures is complex; in general X-ray emission was not associated with the microwave components. A majority of the components were not associated with sunspots, although the brightest (T b ≥ 4 × 106 K) components overlay regions of strong photospheric field or high field gradients. Several of the components coincided with the apparent bases of shorter coronal loops and 4 with the tops of X-ray loops. The X-ray and magnetic field observations are used to constrain possible centimetric emission mechanisms. Thermal bremsstrahlung can not be a significant contributor to this bright microwave emission. Thermal gyro-resonance absorption is consistent with some of the observations, but untenable for those components which are bright in microwaves, lack X-ray emission, and overlie regions of weak magnetic field. As an explanation for the brightest (T b ≥ 4 × 106 K) components, the g-r theory requires coronal loops with significant currents but very low densities. Alternatively, a nonthermal mechanism implies that the emission arises from the transition region and suggests that discrete regions of continuous particle acceleration may be common in active regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00148654
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  • 10
    Electronic Resource
    Electronic Resource
    Injury of the carotid and vertebral arteries (1983)
    Springer
    Neuroradiology 25 (1983), S. 55-69 
    Details
    ISSN: 1432-1920
    Keywords: Injury, vascular ; trauma, head and neck ; stroke ; arteriovenous malformations ; pseudoaneurysms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A knowledge of the normal anatomy and anatomic relationships of the carotid and vertebral arteries, as well as the biomechanics by which traumatic injury occurs to these vessels, is important both in the interpretation of diagnostic arteriograms and in the clinical assessment of the injured patient.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00333294
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