Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 6 (1961), S. 372-376 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 15 (1970), S. 82-91 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 15 (1970), S. 75-82 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 24 (1952), S. 1080-1082 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 20 (1948), S. 926-933 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 51 (1962), S. 59-78 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The apparent resistivity as a function of period (10–86400 sec) was deduced from magnetic and telluric registrations for the stations Niemegk and Ückermünde. The amount of apparent resistivity depends on direction and the period of the variation. It is possible to determine the direction of the induced currents in case of regional electrical inhomogeneities from magnetic registrations alone. In comparing these results with those of other stations it is seen that the resistivity in horizontal directions differs very much from place to place for the earthcrust and the upper mantle. The specific resistivities are much smaller than thougt before, they amount hardly 104 Ωm locally and never for the whole earth.
    Notes: Zusammenfassung Die magneto-tellurischen Verhältnisse in Niemegk und Ückermünde wurden für einen Periodenbereich von 10 bzw. 50 sec bis 86 400 sec ausgewertet. Der scheinbare Widerstand ist abhängig von der Richtung und von der Periode. Aus den magnetischen Variationen läßt sich angenähert die Richtung der Induktionsströme bei inhomogenem Untergrund feststellen. Durch Vergleich mit Ergebnissen an anderen Orten zeigt sich, daß der elektrische Widerstand der Kruste und des Mantels in horizontaler Richtung sehr unterschiedlich ist. Die Widerstände sind kleiner als man bisher angenommen hat und keinesfalls in der Größe von 10 000 Ωm.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary The anomalous local behaviour of the vertical magnetic time-variations is due to regional abrupt changes of electric specific resistivity in horizontal direction. Such local differences of vertical magnetic variations are very frequent in contrast to previous published papers. Under certain conditions it is possible to determine the direction of the underground structures by the aid of geomagnetic variations. The ratio of the vertical and the horizontal component is a function of the period and of the horizontal resistivity gradient. The ionospheric part of theZ-variations in middle latitudes is small in the case of bays andssc's. It has hardly an influence in a statistical treatment. Examples in northern Germany and south-east Europe show the usefulness of magnetic variations and their local character for the determination of the direction of regional geological structures.
    Notes: Zusammenfassung In Richtung des Streichens großräumiger Leitfähigkeitsän-derungen entsteht durch die Induktion der zeitlich variablen ionosphärischen Ströme eine Stromdrängung im Untergrund. Dadurch werden orts- und periodenabhängigeZ-Variationen erzeugt. Mit Hilfe einfacher Annahmen kann man demzufolge aus den zeitlichen magnetischen Variationen die Streichrichtung horizontaler Leitfähigkeitssprünge bestimmen. Die Methoden dazu werden auch mit Hilfe derssc undsfe-Auswert-ungen fremder Autoren ausführlich geschildert und die angenäherte statistische Eliminierung der ionosphärischenZ-Variationen in mittleren Breiten dargelegt. Die berechneten Richtungen stehen im Einklang mit dem Streichen großräumiger geologischer Formationen. Die Tiefe der anomalen magnetischen Induktionserscheinungen dürfte zwischen wenigen km bis deka-km liegen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary According to the method described in part II(2) the direction of regional electric sub-surface structures was evaluated at more than 100 points in Middle and SE-Europe by geomagnetic variations. The sub-surface conditions determine the time variations of the magnetic vertical component in middle and low latitudes to a great part. The evaluation of the registrations of a single place can give important results about the electric structures of the underground, as far as the time-variations of the vertical component are strongly marked.
    Notes: Zusammenfassung Nach der im Teil II(2) geschilderten Methode wurde die Streichrichtung von regionalen elektrischen Leitfähigkeitsstrukturen des Untergrundes mit Hilfe erdmagnetischer Variationen an über 100 Orten in Mittel- und Südosteuropa kartenmäßig dargestellt. Die Untergrundsverhältnisse prägen die zeitlichen Variationen der magnetischen Vertikalfeldkomponente an vielen Orten in mittleren und niederen Breiten. Schon aus den Registrierungen eines einzigen Ortes kann man wichtige Schlüsse auf die Untergrundstrukturen ziehen, sofern die zeitlichen magnetischen Variationen der Vertikalkomponente gut ausgeprägt sind.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 108 (1996), S. 450-462 
    ISSN: 1432-1106
    Keywords: Spinal cord ; H-reflexes ; Ia afferents ; Reflex pathways ; Homosynaptic depression ; Human ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract It was demonstrated that the soleus H-reflex was depressed for more than 10 s following a preceding passive dorsiflexion of the ankle joint. This depression was caused by activation of large-diameter afferents with receptors located in the leg muscles, as an ischaemic block of large-diameter fibres just below the knee joint abolished the depression, whereas a similar block just proximal to the ankle joint was ineffective. The depression of the H-reflex was not caused by changes in motoneuronal excitability, as motor-evoked potentials by magnetic brain stimulation were not depressed by the same passive dorsiflexion. Therefore it was concluded that the long-lasting depression is due to mechanisms acting at presynaptic level. The transmission of the monosynaptic Ia excitation from the femoral nerve to soleus motoneurones was not depressed by the ankle dorsiflexion. The depression thus seems to be confined to those afferents that were activated by the conditioning dorsiflexion. In parallel experiments on decerebrate cats, more invasive methods have complemented the indirect techniques used in the experiments on human subjects. A similar long-lasting depression of triceps surae monosynaptic reflexes was evoked by a preceding conditioning stimulation of the triceps surae Ia afferents. This depression was accompanied by a reduction of the monosynaptic Ia excitatory postsynaptic potential recorded intracellularly in triceps surae motoneurones, but not by changes in the input resistance or membrane potential in the motoneurones. Stimulation of separate branches within the triceps surae nerve demonstrated that the depression is confined to those afferents that were activated by the conditioning stimulus. This long-lasting depression was not accompanied by a dorsal root potential. It is concluded that the long-lasting depression is probably caused by a presynaptic effect, but different from the “classical” GABAergic presynaptic inhibition which is widely distributed among afferent fibres and accompanied by dorsal root potentials. It is more probably related to the phenomenon of a reduced transmitter release from previously activated fibres, i.e. a homosynaptic post-activation depression. The consequences of this post-activation depression for the interpretation of results on spinal mechanisms during voluntary movements in man are discussed.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...