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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 253 (1975), S. 790-790 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 208 (1984), S. 607-611 
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Although sheep have been widely used as models in the study of cardiac physiology, corresponding morphologic and morphometric data are scanty. For meaningful correlation of morphometric data with physiological information, it is desirable that fixation of the heart occur under controlled conditions. This paper describes a technique for in situ, retrograde aortic perfusion fixation of sheep myocardium under conditions of controlled pressure and minimal wastage of fixative. This is achieved by the application of snares around the brachiocephalic trunk and aortic arch, which are tightened at the start of the perfusion. These isolate the ascending aorta and the coronary vasculature from the remainder of the circulation and allow fixation of the whole heart at a controlled pressure. The method produces good fixation and contrast for transmission electron microscopy and is applicable to late-gestation fetuses, lambs, and adult sheep.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 236 (1984), S. 117-119 
    ISSN: 1432-0878
    Keywords: Endothelium ; Microvilli ; Heart ; Coronary vessels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Examination of cardiac vascular endothelium with scanning electron microscopy, and transmission electron microscopy of previously scanned tissue, revealed several regions of the coronary venous system that contained ‘cluster’ microvilli. These consisted of 2–15 microvillous projections that emanated radially from a common base or were grouped into a fan-like arrangement. Although rare, these clusters, when present, were widely distributed over the endothelial cell surface.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 6 (1968), S. 403-408 
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire Des mesures de débit et de ventilation sanguine par unité de volume du poumon ont été effectuées par l'exploration du poumon à l'aide d'un compteur à scintillation après injection intraveineuse ou inhalation d'un gaz radioactif, le Xenon 133. Quelle que soit lat zone du poumon explorée, la fréquence des tops enregistrés sur un appreil courant est difficile à interpréter, et les calculs du débit sanguin par unité de volume sont fastidieux. Un système d'acquisition de mesure (data logger) a été spécialementconçu pour l'enregistrement parallèle de ces impulsions sur bandes perforées, compatible avec l'exploitation par le calculateur Elliott 4100. On présente une description détaillée de la façon dont ces informations sont introduites dans le data logger, ainsi que des modèles de rubans perforés. On donne également une comparaison du débit sanguin calculé par la méthode automatique et par la méthode ordinaire.
    Abstract: Zusammenfassung Blutdurchfluß und Ventilation pro Einheit des Lungenvolumens wurde durch Abtasten (“Scanning”) der Lunge mit Szintillationszählern bestimmt, nachdem das radioaktive Gas, Xenon-133, intravenös injiziert oder inhaliert worden war. Die Zählrate kann für jedes Lungenniveau nach der Anzeige auf dem üblichen Registriergerär nur mühevoll abgelesen werden. Die Berechnung des Blutdurchflusses pro Einheit des Lungenvolumens auf jedem Niveau ist beschwerlich. Diese Zählraten werden durch einen speziell für diesen Zweck entwickelten Datensammler auf Lockstreifen parallel gesammelt, eine Sammelform, die zur Analyse auf einem Elliott-4000-Rechner geeignet ist. Der Vorgang der Informationseingabe in den Datensammler wird im einzelnen beschrieben, und Beispiele der Lochstreifenausgabe werden gezeigt. Die Blutdurchflußwerte aus der automatischen und der nichtautomatischen Methode werden verglichen.
    Notes: Abstract Measurements of blood flow and ventilation per unit lung volume have been made by scanning the lung with scintillation counters after the intravenous injection or inhalation of the radioactive gas, xenon-133. The count rate at any level in the lung after display on a conventional recorder is laborious to read off and the calculations of blood flow per unit lung volume at each level are tedious. A data logger has been specially designed for parallel collection of these count rates on punch tape in a form acceptable for analysis by an Elliott 4100 computer. A detailed description of how information was presented to the data logger and examples of the punch tape output are given. A comparison of regional blood flow calculated by automated and non-automated methods is shown.
    Type of Medium: Electronic Resource
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