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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 177-179 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The blood-bathed organ technique9 was used to assay continuously the concentration of angiotensin II in the circulation of dogs. The assay organs?a rat stomach strip10 and two rat colons6,11?were suspended in polypropylene chambers and superfused12 with Krebs solution while the dog was being ...
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 144-150 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The blood-bathed organ technique has been used to demonstrate that angiotensin I is converted to angiotensin II in the lungs, but not in other vascular beds. The results do not support hypotheses which suggest a completely intra-renal role for the renin–angiotensin ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 138-141 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Measurements of the rate of disappearance of angiotensin in the blood have previously given contradictory results, with half-lives varying from a few minutes to 37 hours. It is now clear that the blood itself plays little part in the inactivation of angiotensin and that the rapid removal of ...
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  • 4
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 73 (1998), S. 2947-2949 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We study a process technique involving SiO2 lateral etching coupled with amorphous Si (α-Si) refilling as a possible alternative to improve performance and lower costs for bipolar complementary metal–oxide semiconductor technologies. We investigated the lateral etching of oxide layers with thicknesses between 50 and 2.5 nm confined between a Si substrate and a multilayer stack composed of polycrystalline Si, WSix, and Si3N4. We found that the lateral etching of SiO2 proceeds even with the smallest thickness (2.5 nm) to create extremely small cavities. The etch extent (fixed time) dependence with SiO2 thickness suggests that capillary action may be an important mechanism. Using standard amorphous Si deposition techniques, we refilled all the small cavities without void formation as witnessed from transmission electron micrographs.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Phytochemistry 14 (1975), S. 816-817 
    ISSN: 0031-9422
    Keywords: Euphorbiaceae ; Macaranga tanarius ; diterpenoids: 6:20-epoxylathyrol-5,10-diacetate-3-phenylacetate and ; ellagic acid. ; sitosterol, 5α-stigmastan-3,6-dione, 6β-hydroxystigmast-4-en-3-one ; steroids ; triterpenoids ; β-amyrenone, β-amyrin, friedel-3-ene, friedelin, friedelan-3β-ol
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 225 (1970), S. 1142-1144 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lungs also contain a highly active angiotensin converting enzyme8'12-15. This enzyme removes histidine and leucine from the C-terminal of angiotensin I, thereby generating angiotensin II, which is 10-50 times more potent physiologically. Converting enzyme was first isolated from plasma16'17, ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 762-766 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Results obtained with the blood bathed organ technique indicate that angiotensin I is converted rapidly to angiotensin II in the pulmonary circulation and not by an enzyme in the ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 742-745 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. The effects of prostaglandins Al5 A2 and E2 infused intravenously (iv) on mean aortic blood pressure (BP), blood flow to the right (H) kidney, and urine flow in a chloralose-anaesthetized dog. Intravenous infusions of prostaglandins At and A2 increased renal blood flow and urine flow, ...
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 9 (1971), S. 305-314 
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire L'activité électrique du duodénum et de l'estomac humains a été analysée en utilisant les techniques vectorielles, de corrélation et d'histogrammes d'intervalles dans le but d'établir le sens de conduction de cette activité. Il est montré que l'activité électrique gastrique à une fréquence de 3/min est conduite le long de l'antrum pylorique, par l'anneau pylorique et à une certaine distance dans le duodénum. Alors que l'activité gastrique n'est conduite que dans le sens aboral, l'activité duodénale semble n'avoir aucun sens constant de transmission. La longueur de l'intestin grêle a été comparée par d'autres savants à une série d'oscillateurs lâchement reliés, fonctionnant à des fréquences qui diminuent avec la distance du duodénum. On montre que l'activié duodénale est semblable à celle d'un modèle qui consiste d'oscillateurs de relaxation fermement reliés qui ne sont pas vérouillés en phase alors qu'ils fonctionnent à une fréquence commune.
    Abstract: Zusammenfassung Die elektrische Aktivität des menschlichen Zwölffingerdarms und Magens ist mit Verwendung von Vektor, Korrelations- und Histogrammtechniken gemeinsamen Zwischenraums zu dem Zweck analysiert worden, die Richtung der Übertragung dieser Aktivität festzulegen. Es wird gezeigt, dass die gastrisch-elektrische Aktivität bei einer Frequenz von 3/min herunter über das pylorische Antrum, über den pylorischen Ring und diene kleine Strecke runter in den Zwölffingerdarm geleitet wird. Während die gastrische Aktivität nur in aborale Richtung geleitet wird, ergab sich, dass Aktivität des Zwölffingerdarms keine feststehende Sendungsrichtung hat. Die Länge des Dünndarms ist von früheren Bearbeitern mit einer Reihe lose verbundener Oszillatoren verglichen worden, die eine Frequenz haben, welche mit Entfernung vom Zwölffingerdarm abnimmt. Die Aktivität des Zwölffingerdarms zeigt sich im Einklang mit einem Modell, das aus eng verbundenen Kippgeneratoren besteht, welche mit gemeinsamer Frequenz schwingen, aber nicht zwangsweise in Phase sind.
    Notes: Abstract The electrical activity of the human duodenum and stomach has been analysed, using vector, correlation and joint interval histogram techniques, with a view to establishing the direction of conduction of this activity. It is shown that the gastric electrical activity at a frequency of 3/min is conducted down the pyloric antrum across the pyloric ring and some distance down the duodenum. Whilst the gastric activity is conducted only in the aboral direction the duodenal activity has been found to have no consistent direction of transmission. The length of small intestine has been likened by previous workers to a series of loosely linked oscillators running at frequencies which decrease with distance from the duodenum. The duodenal activity is shown to be consistent with a model consisting of tightly linked relaxation oscillators which, whilst oscillating at a common frequency, are not phase locked.
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  • 10
    Publication Date: 2005-12-12
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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