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
Filter
  • 2005-2009  (1)
  • 1965-1969  (2)
  • 1955-1959
  • 1915-1919
  • 1910-1914
  • 2005  (1)
  • 1968  (2)
Material
Years
  • 2005-2009  (1)
  • 1965-1969  (2)
  • 1955-1959
  • 1915-1919
  • 1910-1914
Year
  • 1
    Electronic Resource
    Electronic Resource
    350 Main Street , Malden , MA 02148-5018 , USA and 9600 Garsington Road , Oxford OX4 2DQ , UK . : Blackwell Science Inc
    Pacing and clinical electrophysiology 28 (2005), S. 0 
    ISSN: 1540-8159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: When in 1930, Wolff, Parkinson, and White published what is today known as the WPW, or preexcitation syndrome, they, and subsequently others, found few comparable cases in the preceding literature. Among these the report of Cohn and Fraser, published in 1913, was the earliest. However, another even earlier documentation in a 1909 article by Hoffmann escaped notice till now. The ECG of a patient with paroxysmal tachycardia reveals a short PR interval and a delta-wave-induced widening of the QRS complex, even though the reproduced tachycardia was not preexcitation related. The interpretation of this poorly reproduced ECG can be confirmed by another and more detailed description of the patient in an electrocardiography textbook published in 1914 by the same author. Thus, the earliest publication of an ECG showing ventricular preexcitation now can be dated back to 1909. Moreover, the Hoffmann monograph contains two additional examples of the WPW syndrome not noticed until now. All three cases published by Hoffmann had their first ECG recordings in 1912 or earlier.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 345 (1968), S. 255-263 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Einer akuten Hodennekrose bei der Ratte, hervorgerufen durch eine einmalige subcutane Injektion von Cadmiumchlorid, folgt eine reparatorische Entzündung, die von der Hodenkapsel ausgeht und sich im Interstitium zentralwärts ausbreitet. Sie ist mit einem Wiederansteigen der im nekrotischen Hoden stark abgesunkenen Aktivität hydrolytischer und oxydativer Enzyme verbunden. Das Wiederaufleben der Enzymaktivitäten ist durch das Granulationsgewebe bedingt und nicht mehr eine spezifische Eigenschaft des Hodengewebes. Dies kommt auch durch die stark veränderten Isoenzymfraktionen zum Ausdruck. Das nekrotische Keimepithel zeigt keinerlei Ansatz zur Regeneration. Das kann die frühere Annahme einer unmittelbaren toxischen Schädigung des Keimepithels durch das Cd-Ion noch unterstützen.
    Notes: Summary An acute necrosis of the rat testis, induced by one subcutaneous injection of cadmium chloride, is followed by inflammation and repair. Regeneration begins in the tunica albuginea and spreads into the interstitium towards the centre. It is associated with a return of the activity of hydrolytic and oxidative enzymes that are greatly reduced in the necrotic testis. The revival of the enzymatic activities is caused by the proliferating tissue, but is not a specific quality of the testicular tissue, as is obvious from the markedly changed isoenzymatic fractions. The necrotic germinal epithelium shows no attempt to regenerate. This supports the former suggestion that cadmium ion acts directly as a toxin on the germinal epithelium.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Radiation and environmental biophysics 5 (1968), S. 24-31 
    ISSN: 1432-2099
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Description / Table of Contents: Zusammenfassung Nach einer Definition der Verstärkung in biologischen Systemen wird am Beispiel desβ-Galaktosidase-Systems inEscherichia coli gezeigt, daß der aus der Regelungstechnik übernommene Begriff sinnvoll eingeführt werden kann. Es erweist sich, daß man im Verstärkungsfaktor eine weitere Größe zur Charakterisierung desβ-Galaktosidase-Systems zur Verfügung hat, die spezifische Aussagen über das dynamische Verhalten des Systems ermöglicht. Die näherungsweise Bestimmung des Verstärkungsfaktors aus experimentellen Daten läßt Oszillationen des Verstärkungsfaktors erkennen.
    Notes: Summary It is shown that the concept of amplification is meaningful in cellular control systems. The coefficient of amplification (gain) is defined for theβ-galactosidase system inEschericha coli. The amplification in theβ-galactosidase system is evaluated by an approximation method. In an example the coefficient of amplification is determined from experimental data.
    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...