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  • 1
    Electronic Resource
    Electronic Resource
    Adrenal Medullary Tropomyosins: Purification and Biochemical Characterization (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 46 (1986), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Tropomyosins have been isolated from bovine adrenal medulla. Purified from a heat-stable extract, the adrenal medulfary tropomyosins show the same chromatographic patterns as platelet tropomyosin components purified under very similar conditions on ion-exchange (DEAE-Sephacel) and hydroxylapatite columns. When analyzed by polyacrylamide gel electrophoresis, the purified fraction, reduced and denatured, yielded three polypeptides with apparent molecular weights of 38,000, 35,500, and 32,000. The molar ratio of the two major polypeptides (38 kd and 32 kd) was 2:1. The predominant form of 38 kd is different from other nonmuscle tropomyosins previously isolated and with which an apparent molecular weight of 30,000 is normally associated. The three adrenal medullary tropomyosins have similar isoelectric points of about 4.7. When adrenal tropomyosins were subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis in the presence of 8 M urea, each form showed a shift to a higher molecular weight, which is a characteristic of muscle tropomyosin. The 38,000 adrenal medullary tropomyosin exhibits a stronger affinity for F-actin than the other forms. Peptide profiles obtained after limited proteolytic digestion show some similarity between the two predominant tropomyosins of the bovine adrenal medulla and also between these and the α and β forms of bovine skeletal muscle tropomyosin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1986.tb08495.x
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  • 2
    Electronic Resource
    Electronic Resource
    Microwave probe diagnostic for the lower hybrid multijunction antenna on TdeV (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1176-1182 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: On the TdeV tokamak a microwave probe diagnostic enables direct measurement of the electromagnetic fields in ten reduced waveguides of the lower hybrid current drive multijunction antenna. In each instrumented reduced waveguide, the local field is measured at two different locations by probes through coupling holes located in the narrow wall of the waveguides. The amplitude and phase of the signals are measured with a multichannel heterodyne circuit and are used to calculate the incident and reflected fields at the antenna mouth. The probes are under vacuum and they are bakeable up to the maximum operating temperature of the antenna (T=350 °C). They are calibrated at room temperature but the evolution of their characteristic with temperature is taken into account in the data analysis. Typical accuracies of the field measurements at the grill mouth are: ±9% for the amplitude and ±6° for the phase. The probe diagnostic has been operating reliably for the last two years and the probes do not appear to perturb the operation of the antenna nor to reduce its power handling capability. Comparisons of the probe measurements with calculations from the multijunction antenna modeling code SWAN show that the code is accurate for low rf power densities at the antenna mouth. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147880
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  • 3
    Electronic Resource
    Electronic Resource
    Thomson scattering diagnostic for the TdeV tokamak : Proceedings of the tenth topical conference on high temperature plasma diagnostics (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 487-489 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The Thomson scattering diagnostic system on the TdeV tokamak (R/a=87/27 cm, BT=1.5 T, Ip〈300 kA) routinely monitors electron temperature (Te) and density (ne). The scattered light from a vertically oriented Nd:YAG laser beam (E=0.8 J, f=50 Hz, Δt=30 ns) is analyzed by six polychromators looking at different vertical positions. Each polychromator splits the light into three spectral bands by means of bandpass interference filters. Avalanche photodiode detectors are used to measure the scattered radiation. These detectors also measure the plasma radiation (including bremsstrahlung) between laser pulses. Two polychromators are optimized for edge temperature measurements (50〈Te〈400 eV), while the four others look at the main plasma (0.3〈Te〈4 keV). Sawtooth-correlated variations of Te(t) and ne(t) are measured by creating a time base locked-in on the sawtooth crash time of soft x-ray signals, so that we can remove the aliasing effect of undersampling Te. Most of the observed temperature fluctuations (20%) at the plasma center are sawtooth induced. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146324
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  • 4
    Electronic Resource
    Electronic Resource
    SODA: The reduced database for the TdeV tokamak : Proceedings of the eleventh topical conference on high temperature plasma diagnostics (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 955-958 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: SODA which stands for Système d'Organisation des Données et d'Analyse, is a general database for TdeV. SODA has the following goals: to produce a database of a reduced set of physical data; to ensure that these data are validated; to record all the parameters relevant to tokamak operation and experiments; to facilitate the retrieval of data using given selection criteria; and to improve data accessibility and analysis. The relational database ORACLE™ has been chosen to provide flexibility and to accommodate the increasing expectations of the TdeV researchers. In-house expertise allows custom-made tables and centralized data management. In the process of creating SODA several new interfaces for the scientific coordinator, machine operator, and diagnosticians have been added to provide a better definition of the experiment for the archiving system. The database includes the more relevant machine and diagnostic parameters, plasma perturbations (rf, biasing, gas...), mean and standard deviation of physical signals, plasma profiles, and code results (equilibrium...) for selected time windows in a discharge. Users of the X-window interface of SODA are not required to know the database structure or the SQL language. SODA has been operating successfully for over a year and its capabilities are continuously expanding. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147724
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  • 5
    Electronic Resource
    Electronic Resource
    Various divertor biasing configurations and improved divertor performance with biasing on Tokamak de Varennes (TdeV)* (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 1497-1502 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electrically insulated divertor plates are used on TdeV (Tokamak de Varennes) [18th EPS Conference on Controlled Fusion and Plasma Physics Berlin (European Physical Society, Petit-Lancy, 1991), Vol. 15C, Part I, pp. 1–141] to produce various biasing configurations, which can be decomposed into two basic modes. Plasma biasing, with a radial electric field Er in the scrape-off layer (SOL), is most promising for divertor applications. The Er field is produced with a particular divertor plate geometry, causing a nonambipolar radial current and a particle flow in the Er×BT direction, toward one of the divertors (the active divertor). The pressure and impurity retention in the active divertor are shown, in the Ohmic regime, to be strongly increased by biasing. He exhaust through this divertor is increased by a factor of almost 3 with modest biasing voltages and currents scalable to larger devices. Biasing also modifies the power repartition between the divertors, with the active divertor also receiving a larger fraction of the power.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870699
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  • 6
    Electronic Resource
    Electronic Resource
    Systeme de centrage automatique pour un faisceau d'accelerateur
    Amsterdam : Elsevier
    Nuclear Instruments and Methods In Physics Research 219 (1984), S. 456-460 
    Details
    ISSN: 0167-5087
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0167-5087(84)90214-X
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  • 7
    Electronic Resource
    Electronic Resource
    Computerised audiovisual event recording for infant apnoea and bradycardia (2000)
    Springer
    Medical & biological engineering & computing 38 (2000), S. 477-482 
    Details
    ISSN: 1741-0444
    Keywords: Monitoring ; Apparent life-threatening events ; Sudden infant death syndrome ; Premature infant ; Video
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Event recording, by differentiating between true and false events, has advanced the diagnosis and management of infants on home cardiorespiratory monitors; however, the pathogenesis of many events remains obscure. To clarify infant behaviours around the time of apnoea/bradycardia alarms, a computerised audiovisual event recording system (CAVERS) triggered by the apnoea/bradycardia recorder, has been developed. The audiovisual recording can begin up to 3 min before the alarm and can continue for up to 3 min after the alarm. CAVERS information is recorded for a total of 65 events in 13 infants. The CAVERS proves most helpful in documenting infant position and the wide variety of behaviours associated with bradycardic events. These behaviours range from sleep or quiet wakefulness to crying and generalised movements. Post-event activity is also highly variable. Interestingly, 20 of 65 events appear to terminate when the infant wakes to the audible monitor alarm. Nursing intervention is documented for 14 of 42 bradycardic events but only one of 23 apnoeic events. The CAVERS, by elucidating infant behaviours, provides information complementary to that given by cardiorespiratory event recording. It is suggested that infant monitors of the future should incorporate both audiovisual and cardiorespiratory data to elucidate optimally apparent life-threatening events, apnoeas and bradycardias.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02345740
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