Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 1794-1796 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Dihydro-6-styryl-2(1H)-pyrimidinones (-thiones) react with 1,3-dinucleophilic compounds (phenoles, cyclic diketones) to derivatives of spiro[1]benzopyran-2,4′-pyrimidine.
    Notes: Zusammenfassung Dihydro-6-styryl-2(1H)-pyrimidinone (-thione) reagieren mit Phenolen und cyclischen β-Diketonen zu Abkömmlingen des Spiro[1]benzopyran-2,4′-pyrimidins.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 55 (1973), S. 263-273 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents In the transient analysis of turboalternators, the reactancesX d ′ andX q ′ are assumed to be constants. In saturated machines, however, these reactances are functions of the pre-transient load of the alternator. For more exact analyses saturated reactances should be used. Using an approximate solution of the quasi-Poissonian differential equation the field leakage reactance and the transient reactances are calculated from flux linkages. As an example a Westinghouse alternator with the following nameplate data has been analyzed: 200 MVA, 15 kV, 50 Hz and 4 poles. The results of the numerical analysis has been compared with those of conventional methods of calculation.
    Notes: Übersicht Bei transienten Untersuchungen von Turbogeneratoren werden die ReaktanzenX d ′ undX q ′ als konstant angenommen. In gesättigten Maschinen sind jedoch diese Reaktanzen von der Vorbelastung abhängig. Für genauere Studien sollten deshalb lastabhängige Reaktanzen benutzt werden. Über eine Näherungslösung der Quasi-Poisson'schen Differentialgleichung werden die Streureaktanz des Feldes und die transienten Reaktanzen aus den Flußverkettungen abgeleitet. Als Beispiel wird ein Westinghouse Generator mit den folgenden Nenndaten nachgerechnet: 200 MVA, 15 kV, 50 Hz und 4 Pole. Die Ergebnisse der numerischen Analyse werden mit denen von konventionellen Berechngsmethoden verglichen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 29 (1973), S. 247-256 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The symptomatology and the course of a post-traumatic cerebello-pontine angle syndrome in a 62 year old female patient are described. Neuropathological investigation seven years after the trauma showed that the Trigeminal root had been avulsed from the surface of the Pons, there was isomorphic gliosis in the intrapontine section of the Trigeminal root, and there were tumour-like onion/skin type cell formations within the pons and in the cerebello-pontine angle. The cause and origin of the formations are discussed.
    Notes: Zusammenfassung Symptomatik und Verlauf eines posttraumatischen Kleinhirnbrücken-winkel -Syndroms bei einer 62jährigen Patientin werden beschrieben. Die neuropathologische Untersuchung sieben Jahre nach dem Trauma zeigte einen Trigeminuswurzelausriß an der Ponsoberfläche, eine isomorphe Gliose im intrapontinen Trigeminuswurzelabschnitt, tumorähnliche, zwiebelschalenartige Zellformationen intrapontin und im Kleinhirnbrücken-winkel. Ursprung und Entstehung dieser Formationen werden diskutiert.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Oxidation of metals 3 (1971), S. 261-270 
    ISSN: 1573-4889
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A nickel-iron alloy containing 51 wt. % Ni, 49 wt. % Fe, and small additions of Mn and Si is used commercially in applications where soft magnetic properties and good glass-sealing characteristics are required. This alloy is also used, after plating with a precious metal, as an electrical contact material. For the latter application, the surface condition of the material is important. Accordingly, a study has been made of the surface oxidation characteristics of the commercial alloy and a series of silicon-free experimental alloys to which various manganese additions were made. Experiments were performed at 915°C in atmospheres of hydrogen with various moisture contents. The onset of surface oxidation was found to occur at conditions which were predicted from available thermodynamic data. The degree of surface oxidation was determined metallographically and through reflectivity measurements.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...