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  • 1
    Electronic Resource
    Electronic Resource
    Absence of hydrocephalus in spite of impaired cerebrospinal fluid absorption and severe intracranial hypertension (1987)
    Springer
    Acta neurochirurgica 86 (1987), S. 93-97 
    Details
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Four patients are described presenting papilloedema, increased pressure and reduced CSF absorption—caused by either spinal tumours, leptomeningeal carcinomatosis or encephalitis. Remarkably they all had a normal CT without signs of hydrocephalus. A 24-hour intracranial pressure monitoring showed a mean pressure of 30–35 mm Hg, recurrent plateau waves and high occurrence of B waves. Conductance to CSF outflow studied by a constant perfusion test was severely reduced 0.010–0.026mlmin−1mm Hg−1 (normal 〉 0.12ml mm Hg−1 min−1). Despite these findings no ventricular enlargement was seen on serial CT scans. The reason therefore remains unknown. Disappearance of papilloedema and a variable clinical improvement followed shunt-insertion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01402291
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  • 2
    Electronic Resource
    Electronic Resource
    Electronics for microchannel photomultipliers in the LIDAR Thomson scattering diagnostic on JET (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 3265-3269 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The electronics for the microchannel plate photomultiplier tubes used in the LIDAR (Light Detection and Ranging) Thomson scattering diagnostic on the JET tokamak are described. It is shown how the microchannel plate photomultiplier tubes are gated with a very small coupling between gate signal and output, and how ≈300 V transient pulses with rise times of 230 ps are clipped to safe levels of ≈40 V.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140563
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  • 3
    Electronic Resource
    Electronic Resource
    The LIDAR Thomson scattering diagnostic on JET (invited) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 1451-1456 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: By combining the time-of-flight or LIDAR principle with a Thomson backscatter diagnostic, spatial profiles of the electron temperature and density are measured in a magnetically confined fusion plasma. This technique was realized for the first time on the JET tokamak. A ruby laser (3-J pulse energy, 300-ps pulse duration, 0.5-Hz repetition rate) together with a 700-MHz bandwidth detection and registration system yields a spatial resolution of about 12 cm. A spectrometer with six channels in the wavelength range 400–800 nm gives a dynamic range of the temperature measurements of 0.3–20 keV. The stray light problem in the backscatter geometry is overcome by spectral discrimination and gating of the photomultipliers. A ruby filter in the spectral channel containing the laser wavelength allows calibration of the vignetting along the line of sight by means of Raman scattering, enabling the measurement of density profiles. The low level of background signal due to the short integration time for a single spatial point yields low statistical errors (ΔTe /Te ≈6%, Δne /ne ≈4% at Te =6 keV, ne =3×1019 m−3 ). Goodness-of-fit tests indicate that the systematic errors are within the same limits. The system is described and examples of measurements are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139686
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  • 4
    Electronic Resource
    Electronic Resource
    Anthocyanin colorants from Elderberry (Sambucus nigra L.) IV. Further studies on production of liquid extracts, concentrates and freeze dried powders (1986)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of food science & technology 21 (1986), S. 0 
    Details
    ISSN: 1365-2621
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Anthocyanin extraction from elderberry pomace is improved by mechanical disintegration and use of aqueous HCl in place of acidified ethanol as extractant, with pH being important in determining extractant effectiveness. Extraction at low solvent:pomace ratios gives extracts of higher concentration and lower volume, but with reduced efficiency. Enzyme pretreatments do not improve extractability from exten-sively crushed pomace, and if of extended duration, can result in anthocyanin break-down. Vacuum evaporation of extracts gave little loss of anthocyanins, and combined with freeze drying, produced materials with high anthocyanin retention.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1986.tb00398.x
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  • 5
    Electronic Resource
    Electronic Resource
    Submicrometer-resolution photoelectron-spectroscopy at MAX Lab : INTERNATIONAL CONFERENCE ON SYNCHROTRON RADIATION INSTRUMENTATION (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2168-2171 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The design of a photoemission microprobe beamline at the MAX laboratory is presented. The beamline will utilize the radiation from a 26 period undulator on the 550-MeV MAX storage ring. The beamline will be capable of providing about 1010 photons/s of monochromatized radiation (bandwidth better than 0.25 eV) in the energy range of 20 to 150 eV focused into a submicrometer focal spot. It will be used for scanning photoemission experiments with a lateral resolution better than 1 μm. The optical system is comprised of a plane-grating monochromator with a Kirkpatrick–Baez objective and a specially designed ellipsoidal focusing mirror.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140812
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  • 6
    Electronic Resource
    Electronic Resource
    Spontaneous abortion following mid-trimester amniocentesis. Clinical significance of placental perforation and blood-stained amniotic fluid (1987)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 94 (1987), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. The clinical significance of placental perforation and bloodstained amniotic fluid was studied in a group of 7238 Danish women undergoing mid-trimester amniocentesis for prenatal diagnosis under ultrasound guidance. The risk of spontaneous abortion was significantly increased both in pregnancies where the placenta was perforated and in those with blood-stained amniotic fluid. The risk estimate nearly doubled after placental perforation and more than doubled with a bloody tap. It is concluded that for women at relatively low risk of a fetal genetic abnormality, the indication of the amniocentesis should be reconsidered if a placental perforation is unavoidable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1987.tb02252.x
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  • 7
    Electronic Resource
    Electronic Resource
    The effect of astemizole on bronchial hyperresponsiveness and exercise-induced asthma in children (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Allergy 44 (1989), S. 0 
    Details
    ISSN: 1398-9995
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The ability of the new generation H1-receptor antagonist, astemizole, to prevent histamine-induced airway obstruction and exercise-induced asthma (EIA) was studied in 20 children with asthma. The study was a randomised clinically controlled trial of oral astemizole versus placebo in a cross-over study. In each of the two treatment periods the children were tested at days 0, 6, 15 and 22 of therapy. The two treatment periods were separated by a washout period of 50 days, and at each visit a bronchial challenge with increasing concentrations of histamine followed by an exercise test was performed, and peak flow and asthmatic symptom score were recorded daily. The children tolerated significantly higher mean concentrations of histamine when treated with astemizole compared with placebo (P 〈 0.001). Astemizole postponed the response to exercise, but no change in the maximal response was found. No differences between the treatment periods were found regarding frequency of asthmatic symptoms or the daily recording of peak flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1398-9995.1989.tb02264.x
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  • 8
    Electronic Resource
    Electronic Resource
    Grundlagen der operativen Anwendung tiefer Temperaturen in der klinischen Medizin (1967)
    Springer
    Clinical and experimental medicine 144 (1967), S. 46-53 
    Details
    ISSN: 1591-9528
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The effect of deep temperature applied by Cooper's instrument on the brain of rabbits has been investigated. In 190 tests the influence of reduced blood circulation by ligation of the Aa. carotis and vertebralis on form and sice of ice-balls in the brain has been examined. Deviation from the spherical form of the phenomenon mentioned above was more rarely observed than was expected. The most frequent variations were of an elliptical or flattened manner. It is assumed that a near blood vessel may influence the form of glaciation. Blood supply seems to be most essential for the degree of glaciation. Normal blood flow diminished the size of the iced solid in the brain whereas insufficient bloodsupply or no blood-supply at all caused an extension of it. The blood pressure of 33 rabbits has been raised by injection of adrenalin and noradrenalin. The size of intra-cerebral iceballs by standardiced cooling was significantly reduced by adrenalin, whereas nor-adrenalin did not change it. The reduction of the frozen area is not immediately correlated with the increased blood pressure but with the increased vascularisation.
    Notes: Zusammenfassung An 55 Hirnen lebender Kaninchen wurden in 190 Einzelversuchen Eiskörper mittels des Cooperschen Kälteaggregates gesetzt. Vorher wurden ein- und doppelseitige Ligaturen der Aa. carotides communes und Aa. vertebrales in wechselnden Kombinationen vorgenommen. Die Eiskörpergrößen bei verschiedenen Temperaturen und Vereisungszeiten wurden bei normaler und durch die Ligaturen geminderter Zirkulation gemessen und miteinander verglichen. Die Eiskörper waren nach Ligatur der Hirngefäße in dem versorgten Hirngebiet konstant größer als bei ungehinderter Zirkulation. In 80% der Versuche zeigten sie Kugelform, in 20% ellipsoide oder abgeplattete Formen. An weiteren 33 Kaninchen wurde durch Noradrenalin- und Adrenalingaben der Blutdruck gesteigert. Es ergab sich keine Beeinträchtigung des Durchmessers im Standardverfahren gesetzter intracerebraler Eiskörper durch Noradrenalin, während bei Blutdrucksteigerung nach Adrenalingabe die Kälteeffekte, gemessen an der Größe der Eiskörper im Hirngewebe, reproduzierbar gemindert waren. Diese Wirkung wird auf eine mit dem Blutdruckanstieg verbundene Durchblutungssteigerung des Gehirns zurückgeführt. Bei konstanten Abkühlungsbedingungen kann die Eiskörpergröße als ein Durchblutungsmaß angesehen werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02043605
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  • 9
    Electronic Resource
    Electronic Resource
    Growing skull fracture — Rupture of coronal suture caused by vacuum extraction (1987)
    Springer
    Neuroradiology 29 (1987), S. 502-502 
    Details
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341755
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  • 10
    Electronic Resource
    Electronic Resource
    Seasonal cycles in the output of first stage larvae of the nematode Elaphostrongylus rangiferi from reindeer, Rangifer tarandus tarandus (1985)
    Springer
    Polar biology 5 (1985), S. 49-54 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The output of first stage larvae of the neurotrophic nematode Elaphostrongylus rangiferi was studied both in a herd of reindeer in the field and in reindeer held in captivity. There was a marked seasonal cycle in the output of larvae from infected reindeer. This seasonal cycle is dependent on host sex. After an initial phase of logarithmic increase from the onset of patency in late winter/spring, the larval output declines to a minimum in summer in both female and male reindeer. From then onwards a yearly cycle is repeated with a maximum density of larvae in autumn/early winter from male reindeer, and in late winter/spring from female reindeer. E. rangiferi has an adult longevity of several years in the reindeer, and it is probable that the seasonal cycle of parasite output is linked to seasonal changes in the degree of host stress.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446045
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