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  • 1
    Electronic Resource
    Electronic Resource
    Acute effects of intravenous nisoldipine on left ventricular function after acute myocardial infarction (1994)
    Springer
    Cardiovascular drugs and therapy 8 (1994), S. 345-351 
    Details
    ISSN: 1573-7241
    Keywords: nisoldipine ; acute myocardial infarction ; myocardial stunning ; left ventricular function ; radionuclide angiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Nisoldipine is a calcium antagonist with potent coronary vasodilating effects in patients with chronic stable angina pectoris. In an initial study we showed that intravenous nisoldipine, given 24–72 hours after uncomplicated myocardial infarction, was a safe and feasible intervention that had beneficial effects on global and regional myocardial function. We subsequently studied the acute effects of nisoldipine in six patients within 24 hours (mean 14±4 hours) after the onset of myocardial infarction. Nisoldipine was administered as a 4.5 µg/kg intravenous bolus over 3 minutes, followed by intravenous infusion of 0.2 µg/kg over 60 minutes. Radionuclide angiography, cardiac output, and intraarterial blood pressure measurements were performed before and during nisoldipine. Left ventricular ejection fraction increased from 48.3±10.3% to 55.3±11.8% (p=0.034) during nisoldipine infusion. Regional wall motion score changed during nisoldipine infusion from 3.3±2.5 to 1.8±2.6 (p=0.027). Cardiac output increased from 5.5±1.0 to 7.3±1.3 1/min (p=0.0001). I eart rate increased from 78±12 to 88±11 min−1 (p=0.004). Mean arterial blood pressure decreased from 92±20 to 79±13 mmI g (p=0.038). The rate-pressure product did not change significantly during nisoldipine infusion. It is concluded that nisoldipine improves global and regional left ventricular function in patients with acute myocardial infarction within the first 24 hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877319
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  • 2
    Electronic Resource
    Electronic Resource
    The acute effects of intravenous nisoldipine on left ventricular function 24 to 72 hours after uncomplicated acute myocardial infarction (1988)
    Springer
    Cardiovascular drugs and therapy 2 (1988), S. 673-678 
    Details
    ISSN: 1573-7241
    Keywords: nisoldipine ; acute myocardial infarction ; left ventricular function ; radionuclide angiography ; echocar-diography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The acute effects on left ventricular function of nisoldipine were studied in six patients 56±12 hours (range 44 to 72 hours) after the onset of uncomplicated acute myocardial infarction. Nisoldipine was administered as a 4.5 μg/kg intravenous bolus over 3 minutes followed by an infusion of 0.2 μg/kg during 60 minutes. Radionuclide angiography and two-dimensional echocardiography were performed before and during infusien with nisoldipine. The left ventricular ejection fraction increased significantly from 38%±10% to 49%±10% (P=0.028) during nisoldipine infusion. Regional wall motion index was determined both by radionuclide and by two-dimensional echocardiography and showed a significant change during nisoldipine infusion from 1.9±0.3 to 1.5±0.3 (p=0.028, radionuclide angiography) and from 0.7±0.2 to 0.3±0.2 (p=0.043, two dimensional echocardiography). Heart rate increased significantly from 78±12 min-1 to 92±13 min-1 (p=0.028), but mean double product did not change significantly during nisoldipine infusion. It is concluded that nisoldipine significantly improves global and regional left ventricular function in patients shortly after acute myocardial infarction. This beneficial effect may, however, be partially offset by an increase in heart rate. Since mean double product did not change, it is suggested that nisoldipine may improve coronary blood flow in patients with acute myocardial infarction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00054208
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  • 3
    Electronic Resource
    Electronic Resource
    Improved detection of acute myocardial infarction by magnetic resonance imaging using Gadolinium-DTPA (1989)
    Springer
    The international journal of cardiovascular imaging 5 (1989), S. 1-8 
    Details
    ISSN: 1573-0743
    Keywords: Magnetic Resonance Imaging ; acute myocardial infarction ; Gadolinium-DPTA ; contrast agents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To assess the value of the paramagnetic contrast agent Gadolinium (Gd)-DTPA in Magnetic Resonance Imaging (MRI) of acute myocardial infarction (AMI), we studied 20 patients with a first AMI by ECG-gated MRI before and after intravenous administration of 0.15mmol/kg Gd-DTPA. The MRI studies were performed after a mean of 98 hours (range 15–241) after the acute onset of AMI. Spin-echo measurements (TE 30 msec) were made using a Philips Gyroscan (0.5 Tesla). After performing the baseline MRI scans, the MRI procedure was repeated every 10 minutes for up to 40 minutes following injection of Gd-DTPA. In 18 (90%) patients contrast enhancement in the infarcted myocardial areas was observed after Gd-DTPA. In these patients intensity versus region curves, derived from 9 to 11 adjacent myocardial regions of interest, showed increased signal intensities in the infarcted areas after administration of Gd-DTPA. The precontrast signal intensity ratio between infarcted and normal myocardium was 1.14±0.15 (mean±SD); the postcontrast ratios at 10 minutes were 1.41±0.21 (P 〈0.05), at 20 minutes 1.61±0.19 (P 〈0.01), at 30 minutes 1.43±0.20 (P 〈 0.05), and at 40 minutes 1.33±0.20 (P=NS). It is concluded that MRI using the contrast agent Gd-DTPA significantly improves the visualization and detection of infarcted myocardial areas in patients with AMI and that optimal contrast enhancement is obtained 20 minutes after administration of Gd-DTPA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01745226
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  • 4
    Electronic Resource
    Electronic Resource
    Untersuchungen zum Emaillieren von NickelbasislegierungenHerrn Professor Dr. rer. nat. Dr.-Ing. e.h. Hubert Gräfen zum 70. Geburtstag gewidmet (1996)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 47 (1996), S. 125-132 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations concerning glass lining of nickel base alloysFrequently, handling of highly corrosive products requires the selection of glass-lined equipment in chemical engineering.Normally, carbon steel or low-alloy steel for elevated temperature application is used as base metal. The experience shows, however, that in case of any damage to the glass-lining the base metal will corrode rapidly, thus necessitating an immediate shut-down.Since extreme demands for equipment availability may require a failure-tolerant performance of the equipment I-gal-autoclaves built from various nickel-base alloys were lined with different glass-types and investigated for service performance, especially with regard to mechanical and resistance properties.The paper summarizes the results.
    Notes: Emaillierte Chemieapparate haben in der Chemietechnik bei der Handhabung hochkorrosiver Produkte einen hohen Stellenwert als wirtschaftliches Korrosionsschutzverfahren.Bislang wurden als Trägerwerkstoff ausschließlich un- bzw. niedriglegierte warmfeste Stähle verwendet. Diese aus Kosten-und Festigkeitsgründen ausgewählten Stähle besitzen jedoch keine Korrosionsbeständigkeit in aggressiven Medien, wenn der Emailüberzug bei unsachgemäßer Handhabung großflächig geschädigt worden ist. Ausgehend von der Überlegung, hochkorrosionsbeständige Nickelbasislegierungen als Trägerwerkstoff für den Email-überzug für den Druckbehälterbau einzusetzen, wurden umfangreiche Untersuchungen über das Eigenschaftsprofil der neuen Verbundsysteme durchgeführt und Druckbehälter (4 l-Maßstab) hergestellt, zugelassen und betrieben.Über die Untersuchungsergebnisse der mechanisch-technologischen Werte, das Korrosions- und Emailverhalten wird berichtet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19960470302
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  • 5
    Electronic Resource
    Electronic Resource
    Fumonisin B1 analysis with capillary electrophoresis-electrospray ionization mass spectrometry (1995)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 9 (1995), S. 519-524 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Fumonisin B1, a mycotoxin produced by a common fungal contaminant of corn, Fusarium moniliforme, was analyzed by capillary electrophoresis-electrospray ionization mass spectrometry. System performance was maximal with uncoated columns. System efficiencies of approximately 44 000 plates/m and reproducible analysis times of about 13 min were obtained. System efficiency with methyl-coated columns was approximately 24 000 plates/m. Reproducible analysis times of about 3.5 min were obtained with these columns. With uncoated columns, the concentration limit of detection was 156 ppb with a s/n ratio of approximately 10. The estimated injected mass at 156 ppb was 1.1 pg. Repeated injections of extracts containing constant fumonisin B1 concentrations showed that peak areas were slightly inconsistent, although generally similar to variations encountered with liquid chromatography-electrospray ionization mass spectrometry. The source of this inconsistency was traced to sample solubility, errors inherent in electrophoresis injections, and electrospray instability. Minimizing these problem areas will produce a technique with peak area reproducibilities comparable to liquid chromatography-electrospray ionization mass spectrometry, but with potentially greater resolving power.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290090610
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  • 6
    Electronic Resource
    Electronic Resource
    Ethylen-Polymerisation mit trägerfixierten Organometallverbindungen. IV. Über die Desaktivierung des Katalysators Tetrabenzylzirkonium-AluminiumoxidTeil III: siehe [2] (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 67-70 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Interruption of the monomer feed during the polymerization of ethylene with catalysts produced by reaction of tetrabenzylzirconium with γ-alumina shows that deactivation of the catalyst is not caused by the polyethylene being formed. Catalysts obtained from alumina with different thermal pretreatment and, therefore, different contents of hydroxyl groups on the surface show different deactivation rate.
    Notes: Unterbrechung der Monomerzufuhr bei der Ethylen-Polymerisation mit Katalysatoren, hergestellt aus Tetrabenzylzikonium und γ-Aluminiumoxid, zeigt, daß die Katalysatordesaktivierung nicht durch das gebildete Polyethylen bewirkt wird. Katalysatoren aus Aluminiumoxid mit unterschiedlicher thermischer Vorbehandlung und daher mit unterschiedlichem Gehalt an freien Hydroxylgruppen auf der Oberfläche haben unterschiedliche Desaktivierungsgeschwindigkeit.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370201
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  • 7
    Electronic Resource
    Electronic Resource
    Ethylen-Polymerisation mit trägerfixierten Organometallverbindungen. III. Konzentrationsbestimmung der aktiven Zentren des Katalysators Tetrabenzylzirkonium-AluminiumoxidTeil II: siehe [2] (1986)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 37 (1986), S. 28-31 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The concentration of active sites of supported catalysts, produced by reaction of γ-alumina with tetrabenzyl zirconium was determined by quenching the polymeization of ethylene with labelled butanol. If a small amount of metal organic compound is fixed on the surface of the support, 10% of these compounds are active in polymerization, but with a surplus of metal organic compound on the surface the activity is less than 5%. These catalysts possess active centres having different rate of propagation for ethylene.
    Notes: Die Konzentration der aktiven Zentren von Trägerkatalysatoren aus γ-Aluminiumoxid und Tetrabenzylzirkonium wurde durch Abstoppen der Ethylen-Polymerisation mit tritiiertem Butanol bestimmt. Wenn nur eine geringe Menge metallorganischer Verbindung auf der Trägeroberfläche fixiert ist, sind 10% dieser Oberflächenverbindungen polymerisationsaktiv, während mit einem Überschuß von Metallorganyl auf der Oberfläche die Aktivität geringer als 5% ist. Diese Katalysatoren besitzen Zentren, die unterschiedliche Wachstumsgeschwindigkeit für Ethylene aufweisen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1986.010370108
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  • 8
    Electronic Resource
    Electronic Resource
    Zur molekulargewichtsverteilung von nativen dextranen. I. Analytische und präparative fraktionierung nach der Baker-Williamsschen methodeAus der Dissertation ERICH ERNST, T.H. München 1961. (1962)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 56 (1962), S. 88-103 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The BAKER-WILLIAMS method of fractionation has been applied to dextrans, in order to interprete the experimental fractionations as molecular weight distributions. Therefore the optimum conditions of fractionation has been determined in an analytically sized apparatus by studying the efficiency of the fractionation in dependance of elution volume, temperature gradient and amount of substance. The substance was divided in a great number of fractions.In a preparatively sized apparatus the quantity of the fractions was high enough to determine molecular weights, which, however, give only a crude transformation of the fractionations to molecular weight distributions. It is of advantage that the experimental part and the evaluation of the fractionations are non laborous and easy to perform.
    Notes: Die Fraktioniermethode von BAKER und WILLIAMS wurde auf Dextrane angewandt, insbesondere im Hinblick darauf, die experimentellen Fraktionierkurven als Molekulargewichtsverteilungen zu interpretieren. Dazu wurden in einer analytischen Anordnung die optimalen Fraktionierbedingungen bestimmt, indem die Wirksamkeit der Fraktionierung in Abhängigkeit des Elutionsvolumens, des Temperaturgradienten und der Substanzmenge untersucht wurde; die Substanz selbst wurde in möglichst viele Fraktionen zerlegt.In einer präparativen Anordnung wurden so große Fraktionen erhalten, daß an einigen davon Molekulargewichtsbestimmungen durchgeführt werden konnten, die vorerst jedoch nur eine orientierende Transformation der Fraktionierkurve in die Molekulargewichtsverteilung zulassen. Für halbquantitative Vergleiche ist die Methode gut geeignet; von erheblichem Vorteil ist es, daß die experimentelle Durchführung und die Auswertung der Ergebnisse wenig aufwändig und rasch durchzuführen sind.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1962.020560107
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  • 9
    Electronic Resource
    Electronic Resource
    Über die Einwirkung von Chlorsulfonsäure auf Aldehyde (1929)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 62 (1929), S. 2381-2386 
    Details
    ISSN: 0365-9631
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19290620875
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