Library

X
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
    Pressor, heart rate and plasma catecholamine responses to noradrenaline in pregnant and nonpregnant women (1993)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 100 (1993), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To study cardiovascular responses to noradrenaline during early pregnancy.Design Administration of incremental intravenous infusions of noradrenaline under basal conditions.Setting University Hospital, Nottingham.Subjects Nineteen women admitted for termination of pregnancy in first or second trimester and 18 nonpregnant women as control subjects.Interventions Recordings of blood pressure and heart rate responses during the infusion of noradrenaline. Blood samples taken before, during and after the infusion.Main outcome measures Evoked responses of systolic and diastolic blood pressure and heart rate at steady state during the noradrenaline infusion. Plasma catecholamine concentrations measured by high performance liquid chromatography.Results There were no significant differences between the evoked pressor responses to noradrenaline in pregnancy compared to the nonpregnant state, but there was a lesser bradycardia in response to a standardised change in blood pressure. Neither basal plasma catecholamine concentrations nor those achieved during infusion of noradrenaline differed between pregnant and nonpregnant women. Thirty minutes after discontinuance of the infusion there was a persistent elevation of heart rate in all women, although plasma catecholamine concentrations had returned to basal levels. In pregnant women, systolic and diastolic blood pressures were also elevated at this time, compared to preinfusion levels.Conclusion Cardiovascular regulatory mechanisms are altered in pregnancy with a diminution in the bradycardic response to a pressor challenge evoked by noradrenaline and a delayed recovery from that challenge.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1993.tb15216.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Time Characteristics of Light Pulses from Gallium Arsenide Lasers (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 1083-1085 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Top left, no laser action: peak current, 11.5 amp; top right, laser threshold; peak current, 12.5 amp; bottom left, laser action in overdrive condition; peak current, 19 amp; bottom right, laser action in overdrive condition; peak current, 〉30 amp. In all photographs the upper trace ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1991083a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Fibre optical communications within the United Kingdom (1973)
    Springer
    Optical and quantum electronics 5 (1973), S. 261-274 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Interest in fibre-optic communication systems was aroused by Kao and Hockham in 1966. This survey endeavours to relate how the concept has grown within the United Kingdom from that inception. The work is reviewed from the standpoint of a systems engineer, but briefly covers the components vital to fibre-optic communication systems and mentions the more fundamental studies on which all other aspects have been based.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02057125
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...