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  • 1
    Electronic Resource
    Electronic Resource
    Deterioration of metabolic coronary regulation in hemorrhagic shock (1985)
    Springer
    Research in experimental medicine 185 (1985), S. 429-443 
    Details
    ISSN: 1433-8580
    Keywords: Myocardial blood flow ; Angiotensin II ; Saralasin ; Nephrectomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of hypoxia and the renin-angiotensin system on metabolic coronary regulation in hemorrhagic shock was studied in 22 anesthetized open-chest dogs. Left circumflex coronary blood flow was measured with an electromagnetic flowmeter. Dogs were ventilated with room air (n = 8) or 100% oxygen (n = 7). A third group of dogs was ventilated with room air and bilaterally nephrectomized 5 h prior to starting the experimental protocol (n = 7). After control data had been obtained, dogs were bled from the femoral arteries into a pressurized reservoir which maintained blood pressure at 45 ± 1 mm Hg. The angiotensin II receptor blocker, saralasin, was then infused i.v. (0.1, 1.0, 10.0 µg/kg per min). Coronary blood flow was reduced by hemorrhage, and no significant difference existed in coronary flow during hemorrhage among the three groups. Coronary sinus oxygen saturation was diminished in control animals during hemorrhage from 26% ± 1% to 17% ± 1% (P 〈 0.05) but normal in 100% oxygen ventilated animals (30% ± 3%) and in nephrectomized dogs (34% ± 4%). Coronary oxygen extraction was reduced by saralasin in intact but not in nephrectomized dogs. In six additional experiments, in which blood pressure was not artificially held constant during saralasin infusion, saralasin still significantly improved coronary sinus oxygen saturation and thus reduced coronary oxygen extraction. The data suggest that both hypoxia and the reninangiotensin system participate in the restriction of metabolic coronary regulation in hemorrhagic shock.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851849
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  • 2
    Electronic Resource
    Electronic Resource
    Interactions between coronary occlusion and the renin-angiotensin system in the dog (1983)
    Springer
    Basic research in cardiology 78 (1983), S. 518-533 
    Details
    ISSN: 1435-1803
    Keywords: renin ; angiotensin ; coronary artery occlusion ; myocardial ischemia ; Captopril ; Saralasin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Studies were carried out in 39 barbiturate-anesthetized dogs to determine whether the renin-angiotensin system is important in control of hemodynamics and coronary flow during myocardial ischemia. Plasma renin activity (PRA) was 2.2±0.4 ng·ml−1·hr−1 immediately before coronary artery occlusion (CAO) and increased to 3.8±0.5 (p〈.005) 15 minutes after CAO. In nephrectomized dogs, PRA was 0.76±0.14 ng·ml−1·hr−1 two hours after nephrectomy and remained unchanged after CAO. In contrast, hemodynamic changes following CAO were similar between nephrectomized and intact dogs: mean arterial pressure fell from 126±4 pre CAO to 116±4 mm Hg post CAO (p〈0.005) in nephrectomized dogs and from 130±11 to 120±11 mm Hg (p〈0.005) in intact dogs. Left atrial pressure rose from 5.4±0.9 pre CAO to 7.7±0.9 mm Hg (p〈0.005) post CAO in nephrectomized dogs and 6.3±1.3 to 9.0±1.8 mm Hg (p〈0.005) in intact dogs. Heart rate remained unchanged in both groups. In sham-operated dogs without CAO, neither the angiotensin II blocker Saralasin nor the converting enzyme inhibitor Captopril had significant effects on systemic (SVR) and coronary (CVR) vascular resistances. In contrast, in dogs with CAO, these drugs reduced CVR from 1.28±0.13 mm Hg·ml−1·min·100 g heart weight (resistance units=RU) to 0.85±0.08 RU (p〈0.05) (Saralasin) 15 minutes after treatment and from 1.17±0.09 to 0.88±0.08 RU (p〈0.025), (Captopril) respectively. However, only Captopril reduced SVR, from 10.7±1.13 to 8.2±0.8 RU (p〈0.025). Both Captopril and Saralasin induced a significant increase in collateral blood flow. Nephrectomy, two hours prior to CAO, significantly reduced the effect of Captopril on CVR and collateral blood flow while the effect on SVR persisted. Thus the reduction in CVR appears to be an effect of inhibition of the renin-angiotensin system; this system participates in control of CVR during CAO and may limit coronary collateral blood flow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01906463
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  • 3
    Electronic Resource
    Electronic Resource
    Model identification of a spatiotemporally varying catalytic reaction (1993)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 39 (1993), S. 89-98 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The occurrence of instabilities in chemically reacting systems, resulting in unsteady and spatially inhomogeneous reaction rates, is a widespread phenomenon. In this article, we use nonlinear signal processing techniques to extract a simple, but accurate, dynamic model from experimental data of a system with spatiotemporal variations. The approach consists of a combination of two steps. The proper orthogonal decomposition [POD or Karhunen-Loève (KL) expansion] allows us to determine active degrees of freedom (important spatial structures) of the system. Projection onto these “modes” reduces the data to a small number of time series. Processing these time series through an artificial neural network (ANN) results in a low-dimensional, nonlinear dynamic model with almost quantitative predictive capabilities.This approach is demonstrated using spatiotemporal data from CO oxidation on a Pt (110) crystal surface. In this special case, the dynamics of the two-dimensional reaction profile can be successfully described by four modes; the ANN-based model not only correctly predicts the spatiotemporal short-term behavior, but also accurately captures the long-term dynamics (the attractor). While this approach does not substitute for fundamental modeling, it provides a systematic framework for processing experimental data from a wide variety of spatiotemporally varying reaction engineering processes.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690390110
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  • 4
    Electronic Resource
    Electronic Resource
    Surface characterization of ruthenium-exchanged Y-zeolite used in ammonia synthesisPaper presented at ECASIA 91, Hungary, 14-18 October 1991. (1992)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 18 (1992), S. 650-654 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Na—Y zeolite was cation exchanged with Ru and tested in ammonia synthesis at atmospheric pressure. Activities up to ∼10% of the commercial iron catalyst scaled by the active surface area were observed. Characterization of the zeolites with XPS was complemented with reference thermal desorption spectroscopy data on a polycrystalline Ru metal surface. The catalysts showed high thermal stability in in situ reduction-oxidation cycles. The chemical state of the Ru will be discussed. From shift measurements the Ru is metallic in the active state, but line shape arguments point to a cluster-like particle morphology. The location of the Ru inside or outside the zeolite framework will be discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740180903
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  • 5
    Electronic Resource
    Electronic Resource
    Elementarprozesse bei Reaktionen an reinen OberflächenVortrag auf dem Jahrestreffen der Verfahrens-Ingenieure, 1. bis 3. Oktober 1968 in Stuttgart. (1969)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 41 (1969), S. 289-294 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Primärvorgänge bei der heterogenen Katalyse können mit atomar reinen Einkristall-Oberflächen untersucht werden. Aussagen über die Struktur von Oberflächenphasen werden mit der Methode der Beugung niederenergetischer Elektronen (LEED) erhalten, mit deren Hilfe eine allgemeine Charakterisierung von Adsorptionserscheinungen und katalytischen Reaktionen möglich ist. Es wird über ausgewählte Beispiele berichtet.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330410513
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  • 6
    Electronic Resource
    Electronic Resource
    Dechema-Monographien Bd. 78: Moderne Verfahren der Oberflächenanalyse. Herausgeg. v. D. Behrens u. K. Fischbeck. Verlag Chemie GmbH, Weinheim/Bergstr. 1975. 1. Aufl., 306 S., zahlr. Abb. u. Tab., Ln. DM 57,75 f. Mitglieder d. DECHEMA u. d. Mitgliedsvereine d. Europ. Föderation f. Chemie-Ingenieur-Wesen, DM 72,20 f. Nichtmitglieder (1975)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 47 (1975), S. 533-533 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330471207
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  • 7
    Electronic Resource
    Electronic Resource
    Methods of Surface Analysis Bd. 1. Von A . W. Czanderna. Elsevier Scientific Publishing Comp., Amsterdam-Oxford-New York 1975. 1. Aufl., 481 S., zahlr. Abb. u. Tab., Kunstleder Dfl. 150,-. (1976)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 48 (1976), S. 502-502 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330480539
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  • 8
    Electronic Resource
    Electronic Resource
    Darstellung von Chloro-aqua-Komplexen des Indium(III) und Röntgenstrukturanalyse von [InCl4(H2O)2][S4N3] - einem Tetrachloro-cis-diaqua-Komplex des Indium(III) (1975)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 415 (1975), S. 193-201 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and X-Ray Structure Determination of [InCl4(H2O)2][S4N3] - a Tetrachloro-cis-diaqua Complex of Indium(III)The compounds [InCl4(H2O)2][S4N3] (I) and In2Cl8H2O(S4N3)2 (II) were synthesized and the structure of the former determined by x-ray methods. The compound crystallizes in the space group D2h16-Pnam, the unit cell dimensions are a = 19.473 ± 0.003 Å, b = 6.183 ± 0.003 Å, c = 10.814 ± 0.003 Å. Least squares refinement has reached R = 4.9%.
    Notes: Die Verbindungen [InCl4(H2O)2][S4N3] (I) und In2Cl8H2O(S4N3)2 (II) wurden dargestellt und die Struktur der ersteren mittels Röntgenstrukturanalyse bestimmt. Die Verbindung kristallisiert in der Raumgruppe D2h16 - Pnam mit den Gitterkonstanten a = 19,473 ű 0,003 Å, b = 6,183 ± 0,003 Å, c = 10,814 ± 0,003 Å. Die Verfeinerung nach der Methode der kleinsten Quadrate ergab einen R-Wert von 4,9%.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19754150302
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  • 9
    Electronic Resource
    Electronic Resource
    Die Kristall- und MolekülStruktur von S4N4·2C7H8Anmerkung b. d. Korr.: Die Struktur ist inzwischen auch von anderer Seite veröffentlicht (Griffin u. Sheldrick, Acta Crystallogr. B31, 895 (1975)). Die Publikation unserer Ergebnisse scheint trotzdem sinnvoll, da sie wesentlich genauer sind. (1132 gegenüber 338 Reflexen, R-Wert 3,9 gegenüber 8,8% und damit kleinere δ-Werte, H-Atome aus Differenzfouriersynthese und nicht nur geometrisch lokalisiert.) (1976)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 420 (1976), S. 155-158 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure, of S4N4 · 2C7H8The structure of the title compound has been determined from threedimensional X-ray data. Crystals are monoclinic, with unit cell dimenions a = 16.532 Å, b = 8.563 Å, c = 10.880 Å, β = 103.2°, space group C2h6—C2/c and Z = 4. Least squares refinement, by use of 1132 independent reflections measured on a diffractometer has reached 3.9%.In the S4N4·2C7H8 molecules the organic components are linked to two sulfur atoms of the S4N4, ring each.
    Notes: Die Struktur von S4N4 · 2C7H8 wurde röntgenographisch bestimmt. Die Verbindung kristallisiert monoklin, in der Raumgruppe C2h6—C2/c, mit a = 16,532 Å, b = 8,563 Å, c = 10,880 Å, β = 103,2° und Z = 4. Die Verfeinerung nach der Methode der kleinsten Quadrate ergab einen R-Wert von 3,9%.Die beiden Bicyclopentadien-Molekeln sind an je 2 Schwefelatome des S4N4-Ringes gebunden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19764200208
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  • 10
    Electronic Resource
    Electronic Resource
    Untersuchung von Oberflächenreaktionen mittels Beugung niederenergetischer Elektronen (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 244-244 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19680800624
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