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
    ISSN: 1432-0711
    Keywords: Ovary, human, in vitro, pressure: intrafollicular, intraovarian, intraarterial ; PGF2α ; Catecholamines ; Oxytocine, methyl-xanthine ; Ovulation ; Menschliche Ovarien, in vitro Perfusion, intrafollikulärer, intraovarieller, intraarterieller Druck ; PGF2α ; Catecholamine ; Oxytozin, Methyl-Xanthin ; Ovulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An in vitro perfundierten menschlichen Ovarien der Follikelreifungsphase wurden der intrafollikuläre, intraovarielle und arterielle hydrostatische Druck gemessen. Sowohl im Gefäßsystem, als intraovariell sind spontan auftretende Druckänderungen zu registrieren. Unter Adrenalin, Noradrenalin, Prostaglandin F2α und Oxytocin kommt es einmal zu einer zunehmenden Tonisierung des Gefäßsystems, zum anderen zu vermehrt auftretenden Spontankontraktionen, wobei vor allem unter Prostaglandin F2α und Catecholaminen eine Zunahme von Frequenz und Amplitude zu beobachten ist. Jede Druckerhöhung im ovariellen Gefäßsystem und Gewebe bewirkt in allen Follikeln, die sich noch nicht in der direkt präovulatorischen Phase befinden, ebenfalls einen Druckanstieg. Direkt präovulatorisch treten Druckerhöhungen im Follikel nicht mehr auf, die Volumenzunahme des Liquor folliculi geht dann mit einer zunehmenden Dehnbarkeit der Follikelwand parallel. Die Ergebnisse werden im Hinblick auf die biophysikalischen Aspekte der Ovulation besprochen.
    Notes: Summary The intrafollicular, intraovarian and intraarterial hydrostatic pressures were measured in vitro on human ovaries in the follicular ripening phase. It has been established that in the vascular system as well as in the intraovarian tissues pressure variations occur spontaneously. Thus for example under, the influence of epinephrine, norepinephrine, prostaglandine F2α and oxytocine, the tonicity of the vascular system increases and does so the number of spontaneous contractions rather noticeably, particularly under the influence of prostaglandine F2α, and under the various catecholamines an increase of frequency and amplitude has been observed. Any increase of pressure in the intraovarian vascular system and tissues will effect all the follicles not yet in the preovulatorian phase, in which they cause a similar pressure increase. However, follicles imminently preovulatorian have not shown such pressure increase because the increase of the “liquor folliculi” runs parallel to the increasing elasticity of the follicle walls. The findings are discussed in this article with a particular view of the biophysical aspects of ovulation.
    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
    Archives of gynecology and obstetrics 231 (1982), S. 263-267 
    ISSN: 1432-0711
    Keywords: Bovine ovary ; Corpus luteum ; In vitro perfusion ; Prolactin ; Energy metabolism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Eight bovine ovaries with a corpus luteum were perfused for 4 h in a haemoglobin-free semi-synthetic perfusion medium in a closed circuit. After an initial prolactin(PRL)-free perfusion phase, 4.7 ng/ml ovine PRL was added in the 1st h, followed by 47 ng/ml in the 2nd h and 470 ng/ml in the 3rd h. Glucose and oxygen consumption and the production of lactate, pyruvate and CO2 were measured, while perfusion pressure and pH-value were recorded continuously. Under the influence of PRL anaerobic glucose metabolism was stimulated by 40.5% and oxidative phosphorylation was inhibited. Energy production from aerobic glucose metabolism rose by only 0.25%. Unlike PRL, Human Menopausal Gonadotropin (hMG) and Human Chorionic Gonadotropin (hCG) stimulated aerobic metabolism. This may indicate that PRL is the “older” hormone in phylleogenetic terms.
    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...