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  • 1
    Electronic Resource
    Electronic Resource
    The distinguishing of organic matter in water
    Amsterdam : Elsevier
    Analytica Chimica Acta 7 (1952), S. 396-401 
    Details
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0003-2670(01)83356-0
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  • 2
    Electronic Resource
    Electronic Resource
    Thyroid hormones in chronic heat exposed men (1983)
    Springer
    International journal of biometeorology 27 (1983), S. 75-82 
    Details
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Previous reports have indicated that thyroid gland activity, is depressed in the heat. Total thyroxine (T4) and triiodothyronine (T3) serum levels in 17 workers of the metal work shop at a plant near the Dead Sea and 8 workers in Beer Sheva, Israel were examined. The metal workshop of the plant near the Dead Sea is part of a large chemical plant. The one in Beer Sheva is part of a large construction company. Maintenance work, as well as metal work projects are performed in both workshops. During the work shifts, the workers of the Dead Sea plant were exposed to temperatures ranging from 30–36°C (May–Oct.) and 14–21°C (Dec.–Feb). In Beer Sheva the range was 25–32°C (June–Sept.) and 10– 17°C (Dec.–Feb.). Total T4 was measured by competitive protein binding and total T3 by radioimmunoassay in blood drawn before work (0700) in July and January. In summer. T4 was higher and T3 was lower for both groups than in winter. The observed summer T3 decrease may result from depressed extrathyroidal conversion of T4 to T3. We conclude that the regulation of energy metabolism in hot climates may be related to extrathyroidal conversion of T4 to T3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02186304
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  • 3
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. I. Anwendungsmöglichkeiten zur quantitativen Ultra-Mikroanalyse (1967)
    Springer
    Microchimica acta 55 (1967), S. 1041-1047 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A new modification of the ring oven and several useful supplements for it are described, whose use increases the accuracy of the separations and determinations made with it.
    Notes: Zusammenfassung Eine neue Modifikation des Ringofens und einige nützliche Ergänzungen hierfür wurden beschrieben, mit deren Hilfe die Genauigkeit durchzuführender Trennungen und Bestimmungen gefördert wird.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01225941
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  • 4
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. II. Komplexometrische Ultra Mikro-Bestimmung von Eisen(III) (1967)
    Springer
    Microchimica acta 55 (1967), S. 1048-1050 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The quantitative determination of iron(III) in ultramicro quantities by titration of the thiocyanate complex with 0.001M EDTA is proposed. Any foreign ions may be removed beforehand with the aid of the ring furnace technique.
    Notes: Zusammenfassung Die quantitative Bestimmung von Ultramikromengen Eisen(III) durch Titration des Thiocyanatkomplexes mit 0,001-m ÄDTA wird vorgeschlagen. Etwa anwesende Fremdionen werden mit Hilfe der Ringofentechnik vorher abgetrennt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01225942
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  • 5
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. III (1969)
    Springer
    Microchimica acta 57 (1969), S. 21-24 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The quantitative determination of ultramicro amounts of Co (II) may be conducted by titration of the thiocyanate complex with 0.001M EDTA. Any foreign ions present are removed in advance with aid of the ring furnace technique. Silver and chromium (III) do not interfere, wheras Cu, Bi, W, UO2, Ti and Al must be masked prior to the determination.
    Notes: Zusammenfassung Die quantitative Bestimmung von Ultramikromengen Co(II) durch Titration des Thiocyanatkomplexes mit 0,001-m ÄDTA wird vor-geschlagen. Etwa anwesende Fremdionen werden mit Hilfe der Ringofen-technik vorher abgetrennt. Silber und Chrom(III) stören nicht, während Cu, Fe, Bi, W, UO2, Ti und AI vor der Bestimmung maskiert werden müssen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216659
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  • 6
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. V (1969)
    Springer
    Microchimica acta 57 (1969), S. 792-795 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Following separation of the Cu(II) ions with the aid of the ring furnace technique, it is possible to titrate ultramicro amounts of copper(II) with 0.001M EDTA in the presence of PAN as indicator. A suitable procedure is given.
    Notes: Zusammenfassung Nach Abtrennung von Cu(II)-Ionen mit Hilfe der Ringofentechnik ist es möglich, Ultramikromengen Kupfer(II) mit 0,001-m ÄDTA gegen PAN als Indikator zu titrieren. Eine dazu geeignete Arbeitsweise wird angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216317
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  • 7
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. VI (1969)
    Springer
    Microchimica acta 57 (1969), S. 796-799 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary It is suggested that ultramicro amounts of cadmium be determined by titration of the Cd(II)-xylenol orange complex with 0.001M EDTA. In this way it is possible to determine as little as 0.4μg Cd(II) in the presence of the 40 fold amount of copper with satisfactory accuracy. The cadmium is separated from any other metals by using the ring furnace technique.
    Notes: Zusammenfassung Die quantitative Bestimmung von Ultramikromengen Cadmium durch Titration des Cd(II)-Xylenolorange-Komplexes mit 0,001-m ÄDTA wird vorgeschlagen. Man kann so noch 0,4μg Cd(II) in Anwesenheit der 40fachen Menge Kupfer mit zufriedenstellender Genauigkeit bestimmen. Von sonstigen Metallen wird das Cadmium mit Hilfe der Ringofentechnik abgetrennt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216318
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  • 8
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. VII (1969)
    Springer
    Microchimica acta 57 (1969), S. 800-804 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The proposed method for the ultramioro determination of silver is based on its exchange reaction with CuS on filter paper. The amount of copper equivalent to the silver is washed on the ring furnace into the ring zone and then titrated with EDTA. Interfering ions are removed previously with the aid of the ring furnace technique.
    Notes: Zusammenfassung Die vorgeschlagene Methode zur Ultramikrobestimmung von Silber beruht auf dessen Austauschreaktion mit CuS auf Filterpapier. Die dem Silber äquivalente Kupfermenge wird auf dem Ringofen in die Ringzone gewaschen und dann mit ÄDTA titriert. Störende Ionen werden vorher mit Hilfe der Ringofentechnik entfernt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216319
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. IV (1969)
    Springer
    Microchimica acta 57 (1969), S. 25-29 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary To determine ultramicro amounts of potassium, they are separated with aid of Na3Ag[Co(NO2)6] on the ring furnace. The reaction product is dissolved (with addition of thiocyanate) in hydrochlorid acid and the cobalt is titrated with EDTA. The natural radioactivity of the water among other things can be calculated from the equivalent quantity of potassium.
    Notes: Zusammenfassung Zur Bestimmung von Ultramikromengen Kalium werden diese mit Hilfe von Na3Ag[Co(NO2)6] auf dem Ringofen abgetrennt. Das Reaktions-produkt wird unter Zusatz von Rhodanid in Salzsäure gelöst und das Kobalt mit ÄDTA titriert. Aus der äquivalenten Menge Kalium läßt sich unter anderem die natürliche Radioaktivität des Wassers ermitteln.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01216660
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  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Ringofenmethodik. XII (1975)
    Springer
    Microchimica acta 63 (1975), S. 205-212 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Various sorption possibilities of metal ions on cellulose-capillary carriers were discussed, especially with reference to the significance of this phenomenon in the transport of the metal ions from the precipitation zone (Ppz) into the circular zone (rz) on the ring furnace. Ion exchange as well as adsorption of the Ag(I) ions during the transport on the capillary carrier were excluded by favorable reaction conditions. The sorption, which was established under these conditions, is explained by a reduction of the Ag(I) ions on the cellulose. The extent of the reduction, labelled with the radio nuclide110mAg, was determined by surface measurement of the autoradiographic copying of the transport zone (Ptz) and also by the quantitative measurement of the activity of the sorbed silver by means of an anticoincidence counter. The extent of the sorption type of the Ag(I) ions on the cellulose-capillary carrier, was determined from the experimental results and by way of computations.
    Notes: Zusammenfassung Verschiedene Sorptionsmöglichkeiten von Metall-Ionen auf Zellulose-Kapillarträgern wurden besprochen, vor allem mit Rücksicht auf die Bedeutung dieser Erscheinung beim Transport der Metall-Ionen aus der Niederschlagszone (Ppz) in die ringförmige Zone (Prz) auf dem Ringofen. Durch günstige Reaktionsverhältnisse wurden Ionenaustausch wie auch Adsorption der Ag(I)-Ionen während des Transportes auf dem Kapillarträger ausgeschlossen. Die Sorption, welche unter diesen Bedingungen festgestellt wurde, ist durch Reduktion der Ag(I)-Ionen auf der Zellulose erklärt. Das Reduktionsausmaß der Ag(I)-Ionen, markiert mit dem Radionuklid110mAg, wurde durch Flächenmessung der autoradiographischen Abdrücke der Transportzone (Ptz) wie auch durch die quantitative Messung der Aktivität des sorbierten Silbers mittels eines Antikoinzidenz-Zählers bestimmt. Aus den Versuchsergebnissen und im Wege von Berechnungen wurde das Ausmaß der beschriebenen Sorptionsart der Ag(I) -Ionen auf dem Zellulose-Kapillarträger ermittelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01218607
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