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  • 1
    Electronic Resource
    Electronic Resource
    Mitralinsuffizienz bei koronarer Herzkrankheit (1983)
    Springer
    Journal of molecular medicine 61 (1983), S. 1095-1100 
    Details
    ISSN: 1432-1440
    Keywords: Mitral insufficiency ; Coronary heart disease ; Papillary muscle dysfunction ; Quantitative cineangiography ; Mitral valve prolapse
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary On 121 consecutive patients with coronary heart disease coronary angiography and quantitative left ventricular angiography was done with the view to aortocoronary bypass surgery. 24 (20%) had mitral regurgitation (MR) by angiographic criteria, 20 of them had MR grade I/IV, four had MR II/IV. In 23 out of 24 patients with MR quantitative left ventriculography revealed localized contraction disorders. MR was clinically diagnosed in 15 out of 24 patients. In eleven patients (48%) contraction abnormalities were localized in the inferior wall, in five cases (22%) in the anterior wall and in seven cases (30%) both in the anterior and posterior wall. Of the latter group patients with MR showed a significantly lower ejection fraction than patients without MR (p〈0,05). Furthermore the MR-group showed larger akinetic areas, preferentially located in the inferior segments 0°–240° and in the anterolateral segments 60°–90°. Three vessel disease was more frequent in this group (43%) than in the group without MR (23%). Patients with inferior wall asynergy frequently showed combined stenosis or occlusion of the right and circumflex coronary artery. In conclusion, MR in coronary heart disease is most often associated with localized contraction disorders of the left ventricle; posterior wall infarctions, multiple vessel disease and large akinetic areas are more frequent. However, the hemodynamic significance of MR in patients with chronic myocardial infarction is usually insignificant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01496471
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  • 2
    Electronic Resource
    Electronic Resource
    Phospholipase A2 and Arachidonic Acid: a Common Link in the Generation of the Eosinophil Chemotactic Factor (ECF) from Human PMN by Various Stimuli (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 11 (1980), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: An eosinophil chemotactic factor (ECF) of low molecular weight can be generated and released from human polymorphonuclear neutrophils by the calcium ionophore, phagocytosis of zymosan particles, arachidonic acid, and phospholipase A2. Since the activation of cells by the ionophore and during the phagocytic event leads to phospholipid turnover, with the subsequent generation of arachidonic acid, it is reasonable that phospholipase A2 represents the common link for ECF production. The kinetics of ECF release by phospholipase A2 is similar to the pattern observed with the various stimuli. After a rapid rise in activity a decline occurred at later times of secretion, suggesting a mechanism of inactivation. During subcellular fractionation of cells an ECF-generating component was enriched in the 200,000 g supernatant fraction, which represents the cytosol. Addition of arachidonic acid or phospholipase A2 induced ECF generation. On gel filtration analysis the ECF-generating component revealed a molecular weight of about 80,000 daltons. It is suggested that this component represents a lipoxygenase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1980.tb00007.x
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  • 3
    Electronic Resource
    Electronic Resource
    Study of high energetic electrons emitted during heavy ion collisions (1982)
    Springer
    The European physical journal 304 (1982), S. 207-219 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Double differential cross sectionsd 2 σ/dΩdE were measured for high energetic electrons emitted in heavy ion collisions. Electrons were detected in the energy range of 60 keV-500 keV for various target projectile combinations 66≦Z u =Z t +Z p ≦145 and projectile velocities between 7 % and 10 % of the speed of light. Clear evidence was found that these electrons stem from the united atom formed during the collision. Slope and height of the spectra are discussed with respect to the momentum distribution of strongly bound states (i.e. theL-shell) at momenta far above the mean value. In addition for the systems S, Ni, Br→Pb electrons were detected in coincidence withK x-rays of Pb. By this method the contribution of theK-shell of the combined system to the total spectrum could be separated. Binding energies of theK-shell were estimated by a slope comparison between the coincident and single spectrum. The resulting values are close to the united atom limit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414495
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  • 4
    Electronic Resource
    Electronic Resource
    Deuteron photodisintegration at photon energies between 200 and 700 MeV in backward direction (1983)
    Springer
    The European physical journal 21 (1983), S. 149-154 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The differential cross section of the deuteron photodisintegration was measured at a protion c.m. angle of 180 degrees and for photon energies between 180 and 730 MeV. The protons were detected in a magnetic spectrometer. The proton energy resolution varied between 30 MeV and 50 MeV FWHM. Since these are the first data at 180 degrees in this energy range a comparison can only be done with data from other laboratories extrapolated to 180 degrees and with theoretical predictions. The agreement with existing calculations is poor. Contributions of dibaryons to the cross section seem not to improve the situation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01648791
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  • 5
    Electronic Resource
    Electronic Resource
    Gas chromatographic determination of the configuration of isovaline in antiamoebin, samarosporin (emerimicin IV), stilbellin, suzukacillins and trichotoxins (1980)
    Springer
    Chromatographia 13 (1980), S. 209-214 
    Details
    ISSN: 1612-1112
    Keywords: Configuration ; Chiral phases ; Gas chromatography ; Isovaline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The D-(resp. R) configuration of isovaline (=2-ethylalanine) was proved for the peptide antibiotics antiamoebin, Tü 165 (CBS 382.62), stilbellin, samarosporin (=emerimicin IV), suzukacillin B (A), trichotoxin A-40 and A-50. This contradicts the previously reported L-configuration for isovaline in antiamoebin and emerimicin IV. The configuration was determined by GC of the N-trifluoroacetyl-isovaline n-propyl ester on glass capillary columns coated with the chiral stationary phase N-propionyl-L-valine tert.-butylamide polysiloxane (Chirasil Val). The D-configuration of the isovaline from trichotoxin A-40 was also established independently using GC of N-pentafluoro-propionyl-isovaline (+)-3-methyl-2-butyl esters on glass capillary columns coated with OV 17.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261873
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  • 6
    Electronic Resource
    Electronic Resource
    Gas chromatographic enantiomer separation of chiral ketones — Order of elution and configurational stability of oxime derivatives (1984)
    Springer
    Chromatographia 18 (1984), S. 698-700 
    Details
    ISSN: 1612-1112
    Keywords: Enantioselective gas chromatography ; Chiral ketones ; Asymmetric synthesis ; Pheromones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Oximes of chiral ketones can be separated into enantiomers by capillary gas chromatography on the chiral polysiloxanes XE-60-L-valine-(S)- or (R)-α-phenylethylamide. Usually predominantly E-isomers are formed and are better separated than Z-isomers. From time-dependent gas chromatographic measurements it can be concluded that the oximes are configurationally stable and that racemization during oxime formation is negligible. The order of elution of enantiomers depends on the structure of the ketone and is different for aliphatic and alicyclic compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02265818
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  • 7
    Electronic Resource
    Electronic Resource
    Quantification of volatile sulfur compounds related to the corrosion of concrete sewers (1984)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 318 (1984), S. 27-29 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A gas-chromatographic procedure for the determination of volatile sulfur compounds related to the formation of the substrate for sulfuric acid producing thiobacilli is described. Volatile sulfur compounds from head-space samples of the sewer atmosphere are qualitatively and quantitatively determined with a sulfur-selective detector. The concentrations are correlated with the occurrence of concrete corrosion in sewage systems.
    Notes: Zusammenfassung Es wird ein gas-chromatographisches Verfahren zur Bestimmung flüchtiger Schwefelverbindungen beschrieben, die mittelbar an der Substratbildung für Schwefelsäure bildende Thiobazillen beteiligt sind. Flüchtige Schwefelverbindungen in Original-Luftproben aus Abwassersammlern werden mittels eines für Schwefel selektiven Detektors qualitativ und quantitativ bestimmt und mit dem Auftreten von Betonkorrosion in Abwasserkanälen korreliert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00532833
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  • 8
    Electronic Resource
    Electronic Resource
    Investigations on basic aspects of fast atom bombardment mass spectrometry: Matrix effects, sample effects, sensitivity and quantification (1984)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 11 (1984), S. 217-222 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Basic aspects f fast atom bombardment mass spectrometry such as matrix effects, discriminatory effects between positive and negative ion formation, sensitivity, and isotope dilution have been investigated using oligopeptides and amino acid derivatives as model compounds. The matrix selected was found to have a decisive influence on the sensitivity of fast atom bombvardment. Acidic and basic properties of the samples could be correlated with different ionization efficiencies in positive or negative ion formation. With respect to sensitivity, a roughly linear relation between signal intensity and sample amount was observed in the range of 1 ng to 10 μg of sample. Nanogram amounts of samples could be detected by fast atom bombardment mass spectrometry. Finally, the suitability of fast atom bombardment for quantitative investigations is proven by the investigation of isotopically labelled mixtures.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200110505
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  • 9
    Electronic Resource
    Electronic Resource
    The mass spectra of 3-substituted 1,2-diphenylcyclopropenes (1983)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1983), S. 88-88 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210180211
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  • 10
    Electronic Resource
    Electronic Resource
    Separation of enantiomers by capillary gas chromatography with chiral stationary phases (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 588-595 
    Details
    ISSN: 0935-6304
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240051102
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