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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 26 (1988), S. 303-309 
    ISSN: 1741-0444
    Keywords: Field distribution ; Finite-element method ; Plethysmography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A two-dimensional model of the thorax has been analysed to study the electrical potential distributions under various physiological conditions in relation to electrical field plethysmography. The quasi-harmonic equation has been solved over a cross-section of the thorax with the help of a finite-element method under the assumptions of homogeneous and isotropic tissue characteristics. Potentials along the boundary of the model have been plotted and the optimum electrode locations derived from the analysis corresponded well with the experimentally obtained positions. It is concluded that cardiac activity can be monitored effectively in the presence of lung activity. It has also been found that, with a suitable modification of the positions of the pick-up electrodes, lung activity can also be monitored. The equipotential lines drawn and the current densities computed have provided a picture of the field distribution pattern in the thoracic model. The analysis showed that the technique fulfils the preliminary requirements of a plethysmographic tool.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 353 (1967), S. 87-92 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Aus Triarylgermaniumbromid (Aryl = Phenyl, p-Tolyl) wurden nach der Silbersalzmethode einige neue Triarylgermaniumverbindungen  -  z. B. Carboxylate, Sulfat, Selenat  -  erhalten und das schon beschriebene Bis-triphenylgermanium-sulfid2 nun aus der freien Base und H2S hergestellt. Aus IR-Spektren wird auf die Strukturen geschlossen.
    Notes: Several new triarylgermanium derivatives viz. triphenylgermanium benzoate, salicylate, mandelate, sulphate, selenite, selenate, tri-p-tolylgermanium benzoate and sulphate have been prepared by the interaction of triarylgermanium bromide with corresponding silver salt in an inert solvent. Triphenylgermanium acetate1 and bis-triphenylgermanium sulphide2, already described in the literature, have also been obtained by methods other than those reported. The compounds have been characterised, and their structures are discussed on the basis of infrared spectra.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 443 (1978), S. 279-283 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Extraction von Quecksilber(II)-thiocyanat-Komplexen durch Amine mit hohem MolekulargewichtDie Extraktion von Quecksilber(II)-thiocyanat-Komplexen mit Aminen und quaternären Ammoniumsalzen hohen Molekulargewichts wurde in Abhängigkeit von der Thiocyanatkonzentration, dem pH-Wert der wäßrigen Phase und der Konzentration des Metalls bzw. des Amins untersucht. Es wurde versucht, die extrahierten Spezies zu identifizieren.
    Notes: The extraction of HgII thiocyanate complexes in various high molecular weight amines and quaternary ammonium salt has been studied. The extraction efficiency of various amines and the dependence of extraction on thiocyanate concentration, pH of the aqueous phase and on metal and amine concentration have been investigated. An attempt has also been made to identify the extracting species by extraction isotherms and log-log plots of amine concentration vs. distribution ratio.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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