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  • 1985-1989  (1)
  • 1960-1964  (36)
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  • 1
    Electronic Resource
    Electronic Resource
    Composition and Stability of the Chelate between Uranium(VI) and Sulfodichlorohydroxydimethyl Fuchson Dicarboxylic Acid(Trisodium Salt) (1963)
    s.l. : American Chemical Society
    Inorganic chemistry 2 (1963), S. 216-219 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50005a056
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    ADSORPTION OF CONGO RED BY HYDROUS THORIUM OXIDE (1961)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 65 (1961), S. 1272-1273 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100825a502
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  • 3
    Electronic Resource
    Electronic Resource
    Uranium (VI) – Chromotropic Acid Chelate (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 1002-1003 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Here, the composition and stability of the uranyl ion-chromotropic acid chelate have been examined by spectrophotometry. Solutions of disodium-l:8-dihydroxy naphthalene-3:6-sulphonate were prepared and standardized by determining the sulphur content. Solutions of uranyl sulphate (B.D.H. AnalaR) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1971002a0
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on the precipitation of thorium hydroxide (1961)
    Springer
    Colloid & polymer science 175 (1961), S. 136-139 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Bei der Fällung von Thoriumhydroxid aus Thoriumchlorid durch Natriumhydroxidlösung findet vollständige Fällung bei einem Alkalibetrag von weniger als vier Äquivalenten statt, während das Medium noch sauer ist. Im allg. nimmt die Assoziation von Chlorionen mit der Fällung bei wachsender Menge an zugefügtem Alkali ab, während die Assoziation von Natriumionen bis zur Zufügung von vier Äquivalenten unter gleichen Bedingungen ansteigt und erst dann abnimmt. Verdünnen und Temperatur ergeben beträchtliche Effekte auf die Adsorption der Anionen, wobei die Fällungswerte dem theoretischen Betrag zustreben.
    Notes: Summary In the precipitation of thorium hydroxide from thorium chloride by sodium hydroxide solution, complete precipitation takes place with an amount of alkali less than four equivalents while the medium is still acidic. In general, the association of chlorine ions with the precipitate diminishes with increasing quantity of alkali added while the association of sodium ions increases under the same conditions, till the addition of four equivalents has been done and then diminishes. Dilution and temperature have got marked effects on the adsorption of anions where the precipitation values tend to the theoretical amount.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520672
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  • 5
    Electronic Resource
    Electronic Resource
    Electrometric studies on the precipitation of thorium hydroxide (1962)
    Springer
    Colloid & polymer science 184 (1962), S. 140-142 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Mit Alterung von Thoriumoxid treten betrÄchtliche Änderungen im pH der Systeme auf. Der Anstieg des pH ist ein Ergebnis des Freiwerdens von HydroxylIonen, die Abnahme zeigt das Freiwerden von Wasserstoff-Ionen vom Adsorbenten an. Alterung unterhalb des Inflexionspunktes, besonders mit grö\erem Alkali-Gehalt, führt zur Koagulation des Thoriumhydroxids, was schlie\lich das pH des Mediums vergrö\ert.
    Notes: Summary On the ageing of thorium hydroxide, there is considerable change in the pH of the system. Increase of pH is a result of release of hydroxyl ions and decrease of pH indicates the release of hydrogen ions from the adsorbent. Ageing before inflexion point especially with larger alkali leads to the coagulation of thorium hydroxide which eventually increases the pH of the medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01795085
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of temperature on the adsorption of Copper (II), Silver (I), Oxalate (II) and Ferrocyanide (IV) by different samples of precipitated hydrous thorium oxide (1962)
    Springer
    Colloid & polymer science 183 (1962), S. 71-74 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Adsorption von anorganischen Ionen wie Kupfer-II, Silber-I, Oxalat-II und Ferrocyanid-IV an verschiedenen Proben von wäßrigem Thoriumoxid bei verschiedenen Temperaturen wurde bestimmt. Ein Anstieg der Temperatur führt zur Abnahme der Adsorptionskapazität und damit zu einem Phänomen ähnlich der Alterung der Proben. Es ist festzustellen, daß der Alterungseffekt und ein Überschuß von Alkali zu Dehydratation der Proben führt. Ein Polarimerisationsmechanismus wird aufgestellt, um diese Beobachtungen zu erklären.
    Notes: Summary Adsorption of inorganic ions viz. copper (II), silver (I), oxalate (II) and ferrocyanide (IV) by various samples of hydrous thorium oxide at different temperatures has been studied. Increase in temperature leads to the decrease in the adsorptive capacity of the hydroxide and hence to a phenomenon similar to that of ageing of the samples. It is postulated that the effect of age and excess of alkali lead to dehydration of the samples. A mechanism of polymerisation has been suggested to explain these observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02260544
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  • 7
    Electronic Resource
    Electronic Resource
    Electrometric studies on the precipitation of thorium hydroxide (1962)
    Springer
    Colloid & polymer science 184 (1962), S. 54-56 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Bei pH-Untersuchungen der Fällung von Thorium-hydroxid durch Wechselwirkung — mit verschiedenen Konzentrationen von Thoriumchlorid und Natrium-hydroxid wird beobachtet, daß jedes Mal nahe pH 7 komplette Fällung auftritt. Die Ergebnisse zeigen auch, daß die Konzentrationen kaum von Einfluß auf die vollständige Fällung sind. Die Inflexionspunkte aller Kurven treten vor Zufügung von 4 Äquivalenten von Alkali auf. Das bestätigt, daß vollständige Ausfällung mit einem Betrag an Alkali weniger als das theoretische Äquivalent stattfindet.
    Notes: Summary By the pH studies of the precipitation of thorium hydroxide by interaction between different concentrations of thorium chloride and sodium hydroxide, it is observed that the complete precipitation in every case occurs near a pH of 7. The results also show that concentrations have little effect on the pH of complete precipitation. The inflexion points of all the curves occur before the addition of four equivalents of alkali confirming that the complete precipitation occurs with an amount of alkali less than the theoretically equivalent amount.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01840141
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  • 8
    Electronic Resource
    Electronic Resource
    Conductometric studies on the precipitation of thorium hydroxide (1961)
    Springer
    Colloid & polymer science 174 (1961), S. 155-157 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die vorliegende Arbeit behandelt die änderung der Leitfähigkeit von Thoriumchlorid bei Zusatz von Natriumhydroxydlösung. Die Leitfähigkeit an Lösungen nimmt ab und erreicht ein Minimum, um anschlie\end wieder zu steigen. FÜr konzentrierte Lösungen liegt das Minimum niedriger, als es dem Verhältnis Th4+∶OH−=1∶4 entspricht. FÜr verdÜnnte Lösungen nähert sich das Minimum dem theoretischen äquivalentbetrag. Gleiche Resultate ergeben sich fÜr Zusatz von Thorium zu NaOH. Auch diese Arbeit zeigt, da\ die Fällung von Adsorption verschiedener Ionen im System begleitet ist, die die Fällung abweichend vom theoretischen äquivalentwert schon vollständig ableiten lassen.
    Notes: Abstract The present paper deals with the study of the changes in conductance of thorium chloride with progressive addition of sodium hydroxide solution. It has been observed that the conductance of the mixture decreases and reaches a minimum and then finally rises. For concentrated solutions, the minimum point is much less than at the ratio Th4+∶ 0H−∶∶ 1∶4. As the solutions used are diluted, the minimum point shifts towards the theoretical equivalent amount. Similar results are also observed in reverse titrations. In this paper it has been supported that the precipitation is accompanied by the adsorption of various ions from the system, which in its turn completes the precipitation much before the theoretical equivalent of alkali as shown by the minima points of the curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01559378
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  • 9
    Electronic Resource
    Electronic Resource
    Conductometric studies on the precipitation of thorium hydroxide (1961)
    Springer
    Colloid & polymer science 175 (1961), S. 53-56 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Diese Arbeit behandelt die Wirkung der Alterung auf die Leitfähigkeit von Hydroxid, ausgefällt aus Thoriumchlorid mit fortschreitender Zufügung von Alkali. Auch der Alterungseinfluß auf den umgekehrten Vorgang: Zufügung von Thoriumchlorid zu Alkali, wurde untersucht. Die Leitfähigkeitsmessungen an gealterten Proben zeigen, daß zunächst stets eine Abnahme der elektrischen Leitfähigkeit der Mischungen und später eine Zunahme mit fortschreitender Alterung stattfindet. Dieses Phänomen ist für konzentriertere Lösungen ausgeprägter, bei denen ja wohl auch die Adsorption der Ionen stärker ist und damit die Abnahme der elektrischen Leitfähigkeit. Bei verdünnten Lösungen adsorbiert die dem Betrag nach sehr kleine ausgefällte Masse keine wesentlichen Beträge von Elektrolyten aus dem System. Mit verlängerter Alterung findet eine Abnahme der Oberflächenreaktivität des Fällproduktes statt, was die Freigabe von adsorbierten Elektrolyten und damit eine Zunahme der Leitfähigkeit des Systems zur Folge hat.
    Notes: Abstract This paper presents the effect of age on the conductance of hydroxide precipitated from thorium chloride with progressive addition of alkali. The effect of age on reverse titration has also been studied. Conductance study on the aged samples reveals that in every case there is at first a decrease in the electrical conductance of mixture and then an increase on prolonged ageing. This phenomenon is more marked with the concentrated solutions where it is presumed that adsorption of ions is more marked resulting in the diminution of electrical conductance. With dilute solutions, the precipitated mass being very small in amount does not adsorb appreciable amount of electrolytes from the system. On prolonged ageing there is a decrease of the surface reactivity of the precipitated mass, resulting in the release of adsorbed electrolytes and hence the increase in conductance of the system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520114
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  • 10
    Electronic Resource
    Electronic Resource
    Chromatographic study of anionic complexes (1961)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 178 (1961), S. 356-359 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In this paper we have reported our results on the attempted separation of copper(II), nickel(II), cobalt(II) and iron(III) in mixtures by filter paper strip chromatography, using aqueous ethanol as solvent. The effect of the presence of varying concentrations of citrate ion as a complexing agent in the mixtures has been studied. The complexing agent has been added in the metal solution, and not in the solvent as usually done by previous workers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00462592
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