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  • 1
    Electronic Resource
    Electronic Resource
    Chemistry of the polynuclear metal halides. 13. Mixed-metal M6X12n+ species containing both tantalum and molybdenum (1978)
    s.l. : American Chemical Society
    Inorganic chemistry 17 (1978), S. 1867-1872 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50185a034
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Computersystem für die automatische Analyse von Herzkatheterdaten (1978)
    Springer
    Journal of molecular medicine 56 (1978), S. 81-91 
    Details
    ISSN: 1432-1440
    Keywords: Heart catheterisation ; Cath-lab-systems ; Computer analysis ; Haemodynamic studies ; Man-computer interaction ; Computer reliability ; Herzkatheteruntersuchung ; Herzkatheterlabor ; Computeranalyse ; Hämodynamik ; Mensch-Computer-Dialog ; Computer-Zuverlässigkeit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das in Aachen entwickelte Computersystem für die on-line-Analyse von hämodynamischen Daten ermöglicht im Dialog mit dem Rechner die sofortige Auswertung von Ekg, Drücken und Kälte- bzw. Farbstoffverdünnungskurven. Das Vorgehen bei der Kurvenauswertung sowie die vom Computer angestellten Berechnungen der einzelnen hämodynamischen Parameter werden beschrieben. Bei der Gegenüberstellung der ärztlich-manuellen Auswertung der auf Papier registrierten Druckkurven und der Computerresultate zeigt das in der täglichen Routine seit Oktober 1974 eingesetzte System eine sehr gute Korrelation für die Wellenerkennung und Wellenvermessung. Auch bei Verwendung verschiedener in der Praxis üblicher, flüssigkeitsgefüllter Katheter und des Tip-Manometers bestätigt sich für die Druckregistrierung in den einzelnen Herzabschnitten, daß das Computersystem für alle verwendeten Kathetermaterialien eine zuverlässige Auswertung bringt. Die flexible Konzeption des Computerprogramms mit seiner schnellen Adaptation an neue Fragestellungen erlaubt seinen Einsatz nicht nur in der klinischen Routine sondern besonders bei der Bearbeitung wissenschaftlicher Probleme im Rahmen hämodynamischer Untersuchungen.
    Notes: Summary The computer-system for the on-line-analysis of hemodynamic data developed in Aachen enables the clinical user to perform the immediate on-line analysis of ECG, pressure-curves and thermo- or dye-dilution-curves in a dialog mode. The procedure of pressure analysis as well as the calculations by the computer for the individual haemodynamic parameters are described. The comparison of the medicalmanual evaluation of the pressure curves on paper-registration and the computer results of the same measurement shows a very good correlation for wave-recognitions and wave-measurements for this system, integrated in the daily routine since 24 months. As well in the application of various fluid-filled catheters used in praxis as in tip-manometers it could be proved for the pressure-analysis in the different positions of the heart, that the computer-system produces reliable evaluations for all catheter materials used. The flexible conception of the computer program with its fast adaption to new problems allows its use not only in the clinical routine, but also and especially in the handling of scientific questions in the frame-work of haemodynamic analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01480088
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  • 3
    Electronic Resource
    Electronic Resource
    Kontrastmitteldarstellung des linken Ventrikels nach Injektion in den rechten Vorhof (1978)
    Springer
    Journal of molecular medicine 56 (1978), S. 351-354 
    Details
    ISSN: 1432-1440
    Keywords: Angiocardiography ; Left ventricle ; Premature ventricular contractions ; Coronary heart disease ; Videometry ; Angiokardiographie ; Linker Ventrikel ; Extrasystolen ; Koronare Herzkrankheit ; Videometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die Kontrastmitteldarstellung des linken Ventrikels im Rahmen der Herzkatheteruntersuchung hat große Bedeutung in der Beurteilung der Dynamik des Myokards und der Herzklappen. Die Injektion von Kontrastmittel in den linken Ventrikel führt häufig zum Auftreten von Extrasystolen. Eine quantitative Analyse des Kontraktionsablaufs ist in diesen Fällen nicht möglich. Dieser Nachteil der Methode wird umgangen, wenn das Kontrastmittel in den rechten Vorhof injiziert wird. Die nach der Lungenpassage erzielte Darstellung des linken Ventrikels ist bei Anwendung der beschriebenen Technik frei von Extrasystolen und erfüllt die Kriterien der quantitativen Ventrikulographie. Die Erfahrungen der Arbeitsgruppe beruhen auf 57 Kontrastmitteldarstellungen des linken Ventrikels bei 32 Patienten mit verschiedenen Herzerkrankungen. Technik, Indikationen und spezielle Anwendungsmöglichkeiten (Videometrie, Druck/Volumen-Beziehung) werden dargestellt.
    Notes: Summary Left ventricular angiography as a diagnostic means is of considerable importance in the evaluation of myocardial and valvular dynamics. The injection of contrast medium into the left ventricle often causes premature ventricular contractions. In these cases quantitative analysis of the contraction pattern is impossible. This can be avoided by injection of the contrast medium into the right atrium. The technique described allows to obtain ventriculograms which meet the criteria for quantitative angiocardiography. 57 ventriculograms have been performed in 32 patients with various cardiac abnormalities. The study describes the technical procedure, the indications and limitations. Furthermore special applications are discussed (videometry, pressure-volume relationship).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01477395
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  • 4
    Electronic Resource
    Electronic Resource
    A rapid and simple method for the isolation of pure eosinophilic leukocytes from horse blood (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 1654-1656 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary An improved and short method is described for the isolation of intact eosinophilic leukocytes from horse blood with high yield (1–1.5 g/20 1). Viability and purity of the preparations were verified by light and electron microscopy and by the trypan blue exclusion test. Isolated eosinophils were 98–100% pure, intact and viable, and they could be shown to phagocytise immune-complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034734
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  • 5
    Electronic Resource
    Electronic Resource
    A thermodynamic analysis of the secondary transition in the spontaneous precipitation of calcium phosphate (1978)
    Springer
    Calcified tissue international 25 (1978), S. 209-216 
    Details
    ISSN: 1432-0827
    Keywords: Thermodynamics ; Kinetics ; Apatite ; Octacalcium phosphate ; Tricalcium phosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary A thermodynamic analysis has been made of the secondary transition stage in the spontaneous precipitation of calcium phosphate following the amorphous-crystalline transformation. The first formed crystalline material has a solubility similar to that of octacalcium phosphate (OCP) and the computed thermodynamic solubility product remains invariant in the pH range 7.00–8.60. The duration of the secondary stage is sensitive to pH and the transition appears to occur by hydrolysis of the first formed OCP-like phase to a more basic apatitic phase with a tricalcium phosphate (TCP) stoichiometry. The crystalline material at the end of this transition has an invariant solubility product, in the pH range 7.00 to 8.60, when the TCP-like molecular formula is assumed. Changes in the solution chemistry which accompany the solid-tosolid transitions are consistent with the above conclusions. The results of this study are also consistent with those of a previous study which suggest that the stability of the amorphous calcium phosphate phase is dependent upon the instability of the solution phase with respect to OCP formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02010771
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  • 6
    Electronic Resource
    Electronic Resource
    A thermodynamic analysis of the amorphous to crystalline calcium phosphate transformation (1978)
    Springer
    Calcified tissue international 25 (1978), S. 59-68 
    Details
    ISSN: 1432-0827
    Keywords: Amorphous calcium phosphate ; Thermodynamics ; Apatite ; Octacalcium phosphate ; Tricalcium phosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary A thermodynamic analysis of the precipitation of amorphous calcium phosphate (ACP) and its transformation to crystalline apatite has been made. A nearly constant ion product, over a wide variety of conditions, was obtained for a tricalcium phosphate (TCP)-like phase suggesting that the molecular unit which governs the solubility of ACP may be similar in composition to TCP. The introduction of 10% acid phosphate into the formula for the TCP ion product improves the fit of experimental data and results in an invariant ion product. The stability of ACP in solution was found to be dependent upon its thermodynamic instability with respect to an octacalcium phosphate (OCP)-like phase. The dependence of the induction period for the amorphous to crystalline transformation upon the pH and the Ca/P ratio of the solution is best explained by the assumption that an OCP-like phase is initially nucleated on the surfaces of the ACP particles. The events that occur in the immediate post-transition period suggest the hydrolysis of this OCP-like material to an apatitic phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02010752
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  • 7
    Electronic Resource
    Electronic Resource
    123. Frühresultate nach 110 aorto-coronaren Venenbypassoperationen (1978)
    Springer
    Langenbeck's archives of surgery 347 (1978), S. 629-630 
    Details
    ISSN: 1435-2451
    Keywords: Surgery, aortocoronary by-pass ; Early results ; Aortocoronarer Venenbypass ; Frühresultate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer 12-monatigen Periode wurden 110 Patienten (102 Männer, 8 Frauen) mit einer Frühmortalität von 4,5 % operiert. Zusatzeingriffe: 3 mal Klappenersatz, 7 mal Aneurysmektomie. Einfach-Bypass erhielten 22 Kranke,ohne Mortalität. 43 Patienten hatten Doppelbypass, hier starben 3, und unter 45 Patienten mit 3–5fachem Bypass starben 2. 88 % der Gruppe weist in einer Frühbeobachtungsperiode von 4 Monaten Besserung im Vergleich mit dem präoperativen Zustand auf. Für das Persistieren der Beschwerden werden Bypassverschlüsse, Myokardinsuffizienz und:diffuse Coronarveränderungen verantwortlich gemacht.
    Notes: Summary During a twelve-month period, 110 consecutive patients (102 men, 8 woman) with chronic stable angina were operated upon. Early mortality was 4.5 % in this specific series. Concomitant valve replacement and left-ventricular aneurysmectomy were performed in three (2 AVR, 1 MVR) and seven patients respectively. Of all survivors, 88 % were free of angina within a 4-month follow-up period. Bypass occlusion, congestive heart failure, and diffuse sclerosis were primarily responsible for unsuccessful operative results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01579415
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  • 8
    Electronic Resource
    Electronic Resource
    Etude de L'influence de la Concentration Saline et du Rapport Sodium/Calcium du Milieu Nutritif sur la Sensibilite de la Tomate a la Fusariose Vasculaire (1978)
    Springer
    Plant and soil 50 (1978), S. 269-286 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Resume Les auteurs étudient chez la tomate l'influence de la concentration saline et du rapport Na/Ca du milieu nutritif sur le développement de la fusariose vasculaire. A concentration saline élevée (50,4 meq/l), les plantes fanent tardivement mais brusquement et sans jaunissement préalable. La colonisation des tiges parF. oxysporum f. sp.lycopersici est tardive et faible; cependant à rapport Na/Ca élevé, elle augmente rapidement. Il n'y a pas d'acides aminés détectables dans la sève des plantes de 14 jours mais la teneur en N inorganique est toujours supérieure à 2.8 μg/ml. A concentration saline faible (2.5 meq/l), les feuilles jaunissent progressivement et précocement. La colonisation du xylème est précoce et dense; l'influence du rapport Na/Ca est faible. Les acides aminés sont présents dans la sève en quantités relativement importantes et d'autant plus que le Na/Ca croît. Ces résultats de l'évolution de la maladie sont discutés en relation avec la composition chimique des tissus et de la sève et la localisation histochimique du Na et du Ca.
    Notes: Summary The influence of the salt concentration and of the Na/Ca ratio of the nutrient solution on the development of the fusarial wilt of the tomato has been studied. At high salt concentration (50.4 meq/l), plants wilt lately but suddenly without yellowing. The stem colonization byF. oxysporum f. sp.lycopersici is poor and late; however at higher Na/Ca it increases rapidly. There are no amino acids detectable in xylem sap of 14 days old plants but the content of inorganic N is always higher than 2.8μg/ml. At low salt concentration (2.5 meq/l), the yellowing of the leaves begins early and progressively. The xylem colonization by the parasite is dense and precocious; the influence of the Na/Ca is weak. The amino-acids are relatively abundant in xylem sap and their content increases with the increase of the Na/Ca ratio. These results of the development of the disease are discussed in relation to the chemical composition of the tissues and the xylem sap and the histochemical localization of Na and Ca.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107178
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  • 9
    Electronic Resource
    Electronic Resource
    Etude de L'influence de la Concentration Saline et du Rapport Sodium/Calcium du Milieu Nutritif sur la Sensibilite de la Tomate a la Fusariose Vasculaire (1978)
    Springer
    Plant and soil 50 (1978), S. 269-286 
    Details
    ISSN: 1573-5036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Resume Les auteurs étudient chez la tomate l'influence de la concentration saline et du rapport Na/Ca du milieu nutritif sur le développement de la fusariose vasculaire. A concentration saline élevée (50,4 meq/l), les plantes fanent tardivement mais brusquement et sans jaunissement préalable. La colonisation des tiges parF. oxysporum f. sp.lycopersici est tardive et faible; cependant à rapport Na/Ca élevé, elle augmente rapidement. Il n'y a pas d'acides aminés détectables dans la sève des plantes de 14 jours mais la teneur en N inorganique est toujours supérieure à 2.8 μg/ml. A concentration saline faible (2.5 meq/l), les feuilles jaunissent progressivement et précocement. La colonisation du xylème est précoce et dense; l'influence du rapport Na/Ca est faible. Les acides aminés sont présents dans la sève en quantités relativement importantes et d'autant plus que le Na/Ca croît. Ces résultats de l'évolution de la maladie sont discutés en relation avec la composition chimique des tissus et de la sève et la localisation histochimique du Na et du Ca.
    Notes: Summary The influence of the salt concentration and of the Na/Ca ratio of the nutrient solution on the development of the fusarial wilt of the tomato has been studied. At high salt concentration (50.4 meq/l), plants wilt lately but suddenly without yellowing. The stem colonization byF. oxysporum f. sp.lycopersici is poor and late; however at higher Na/Ca it increases rapidly. There are no amino acids detectable in xylem sap of 14 days old plants but the content of inorganic N is always higher than 2.8μg/ml. At low salt concentration (2.5 meq/l), the yellowing of the leaves begins early and progressively. The xylem colonization by the parasite is dense and precocious; the influence of the Na/Ca is weak. The amino-acids are relatively abundant in xylem sap and their content increases with the increase of the Na/Ca ratio. These results of the development of the disease are discussed in relation to the chemical composition of the tissues and the xylem sap and the histochemical localization of Na and Ca.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02107178
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    La fatigue oculaire engendrée par le travail sur écran de visualisation (1978)
    Springer
    Sozial- und Präventivmedizin 23 (1978), S. 295-296 
    Details
    ISSN: 1420-911X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Viele Klagen von Personen, die an Videogeräten arbeiten, scheinen mit kleinen, häufig auftretenden Sehdysfunktionen in Zusammenhang zu stehen. Die Antworten auf einfache Fragebogen und die Anwendung von spezifischen Sehtesten lassen dies feststellen. Es handelt sich deshalb nicht nur darum, eine bessere Sehanpassung zu erzielen, was nicht immer möglich ist, sondern eher eine Neuorientierung betreffs Material und Einrichtungen zu erreichen.
    Notes: Summary It appears that visual complaints, as they are expressed by numerous TV screen operators, are associated with common eye defects. Our results based on a survey with questionnaires and visual testing sustain such an hypothesis. As a consequence, solving eye problems at TV screens requires both the improvement of visual displays and the visual adaptation of users. If impossible working-time should be reduced.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02075161
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