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  • 1
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1961)
    Springer
    Colloid & polymer science 175 (1961), S. 134-136 
    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 Koagulation positiv geladener Sole von wäßrigem Ferrioxyd mit verschiedenen mittleren Partikelgrößen durch Kalium als Koagulator wurde in Gegenwart von Äthylalkohol, Aceton und Gelatine untersucht. Die Empfindlichkeit der Sole und der Grad der Sensibilisierung steigt mit der Feinheit der dispergierten Partikel. Es wird geschlossen, daß die Adhäsionstendenz der Oberflächen der dispersen Partikel in Gegenwart oben genannter Nichtelektrolyte steigt und so zu einer Erhöhung der Kollisionsmöglichkeit führt, die die Sensibilisierung zur Folge hat. Das Stabilitätsverhältnis nimmt in Gegenwart der zugemischten Nichtelektrolyte für gleiche Beträge des Koagulanten ab.
    Notes: Abstract The coagulation of positively charged sol of hydrous ferric oxide of different average particle sizes for potassium sulphate as the coagulant has been studied in the presence of ethyl alcohol, acetone and gelatin. It has been observed that these sensitise the sol and the degree of sensitisation increases with the fineness of dispersed particles. It has been concluded that the adhesive tendency of the surface of dispersed particles increases in the presence of said non-electrolytes leading to an increase in the frequency of collisions resulting in sensitisation. The stability ratioW decreases in the presence of said non-electrolytes for the same amount of coagulant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520671
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  • 2
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1961)
    Springer
    Colloid & polymer science 176 (1961), S. 29-31 
    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 Koagulation positiv geladener Sole von wäßrigem Ferrioxid verschiedener mittlerer Partikelgrößen mit Kaliumsulfat wird in Gegenwart von Glykose und Harnstoff, die beide das Sol stabilisieren, untersucht. Der Grad der Stabilisierung hängt von der Teilchengröße ab. Es wird geschlossen, daß die Adhäsionstendenz der Oberflächen der dispergierten Partikel in Gegenwart besagter Nichtelektrolyte abnimmt und so zur Abnahme der Kollisionshäufigkeit und damit zur Stabilisierung führt. Das StabilisierungsverhältnisW wächst in Anwesenheit von Glykose und Harnstoff für gleiche Beträge des Koagulators.
    Notes: Abstract The coagulation of positively charged sol of hydrous ferric oxide of different average sizes for potassium sulphate has been studied in the presence of glucose and urea which stabilise the sol. The degree of stabilisation increases with the fineness of dispersed particles. It has been concluded that the adhesive tendency of the surface of dispersed particles decreases in the presence of said non-electrolytes leading to a decrease in the frequency of collisions resulting in stabilisation. The stability ratioW increases in the presence of glucose and urea for the same amount of the coagulant.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520031
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  • 3
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1962)
    Springer
    Colloid & polymer science 186 (1962), S. 112-113 
    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
    Notes: Summary The adsorption of coagulating ion Ba++ has been determined for the negatively charged sol of hydrous manganese dioxide during its coagulation as affected by barium nitrate in presence of various non electrolytes. The adsorption of stabilising ion OH− has, however, been measured for a precipitate of hydrous manganese dioxide in presence of ethyl alcohol, acetone, glucose, urea, and gelatin. The adsorption of both the ions decreases in presence of ethyl alcohol and acetone whilst increase is observed with the rest. It has been concluded that it is not possible to correlate the change in adsorption of either the coagulating or stabilising ion with sensitisation or stabilisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499274
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  • 4
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1963)
    Springer
    Colloid & polymer science 187 (1963), S. 51-53 
    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 Koagulation wä\riger Eisen- und Mangandioxidsole wurde mit zwei- und dreiwertigen koagulierenden Ionen bei drei verschiedenen Verdünnungen mit und ohne Nichtelektrolyte bei 35
    Notes: Summary The coagulation of hydrous ferric oxide and hydrous manganese dioxide sols has been studied at 35±0.05)
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01622717
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  • 5
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1962)
    Springer
    Colloid & polymer science 181 (1962), S. 158-159 
    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 Koagulation von negativ geladenem Sol von wä\rigem Magnesiumdioxid mit Kalium- und Bariumnitrat ohne und in Gegenwart von Nichtelektrolyten wurde bei drei verschiedenen Temperaturen untersucht. FÜr die Stabilisierung wird angenommen, da\ Nichtelektrolyte die Oberfläche der dispersen Partikel so beeinflussen, da\ die Kohäsionskräfte vermindert werden und die Aktivierungsenergien ansteigen. Das Entgegengesetzte ist bei Sensibilisierung der Fall.
    Notes: Abstract The coagulation of negatively charged sol of hydrous manganese dioxide has been studied at three temperatures for Potassium nitrate and Barium nitrate as the coagulating electrolytes both in the absence and in the presence of non-electrolytes. It has been concluded that for stabilisation, the non-electrolyte affects the surface of the dispersed particles such that the cohesive forces are diminished and the value of the energy of activation increases; the reverse is, however, true for sensitisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499671
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  • 6
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1962)
    Springer
    Colloid & polymer science 186 (1962), S. 110-112 
    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 Koagulation von wäßrigem Eisenoxidsol mit unterschiedlicher mittlerer Teilchengröße und Kaliumsulfat als Koagulator wird auf Temperatur und pH der Gelatinelösung untersucht. Die Oberflächenkräfte werden durch die Gelatine im Sinne einer Sensibilisierung modifiziert.
    Notes: Summary The coagulation of hydrous ferric oxide sol of varying average particle size has been studied in presence of gelatin for potassium sulphate as the coagulant. The effect of temperature and pH of gelatin solution has been noted. It has been concluded that the surface forces are modified in the presence of gelatin causing sensitisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499273
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  • 7
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1963)
    Springer
    Colloid & polymer science 188 (1963), S. 57-59 
    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 Koagulation positiv geladener Sole von wäßrigem Eisenoxid verschiedener mittlerer Partikelgröße durch Kaliumnitrat läßt Sensibilisierung durch Äthylalkohol, Aceton und Gelatine beobachten, während sich für Glukose und Harnstoff Stabilisierung ergibt. Die Sensibilisierung nimmt im Laufe der Zeit ab, während die Stabilisierung steigt. Der Grad der Sensibilisierung wächst mit der Feinheit der Partikel. Es folgt, daß die Adhäsionstendenz der Oberflächen der dispersen Teilchen durch die Gegenwart von Elektrolyten modifiziert wird.
    Notes: Summary The coagulation of positively charged sol of hydrous ferric oxide of different average particle sizes by potassium nitrate has been studied. Sensitisation has been observed for ethyl alcohol, acetone and gelatin whilst stabilisation occurs for glucose and urea. The extent of sensitisation decreases with the progress of time whilst the reverse happens in stabilisation. The degree of sensitisation or stabilisation increases with the fineness of dispersed particles. It has been concluded that the adhesive tendency of the surface of dispersed particles is modified in the presence of nonelectrolytes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01499605
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  • 8
    Electronic Resource
    Electronic Resource
    Stability of lyophobic sols (1961)
    Springer
    Colloid & polymer science 177 (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 Adsorption der stabilisierenden H-Ionen wurde für einen Niederschlag aus wäßrigem Eisenoxyd und die für SO4-Ionen für ein positiv geladenes gleiches Sol während der Koagulation in Anwesenheit verschiedener Elektrolyte bestimmt. Koaguliert wurde mit Kaliumsulfat. Die Adsorption beider Ionenarten nimmt in Gegenwart von Äthylalkohol und Aceton ab. Sie steigt jedoch bei Glucose und Harnstoffzusatz. Mit Gelatine sinkt die Adsorption beider Ionenarten bei niedrigen Konzentrationen und steigt bei höheren. Es wird hieraus geschlossen, daß das Zurückgehen der Adsorption weder der stabilisierenden noch der koagulierenden Ionen Sensibilisierung oder Stabilisierung zu erklären erlaubt.
    Notes: Abstract The adsorption of stabilising ion H+ has been determined for a precipitate of hydrous ferric oxide and that of SO4″ for the positively charged sol of hydrous ferric oxide during its coagulation as affected by potassium sulphate in presence of various non-electrolytes. The adsorption of both the stabilising and coagulating ions decreases in presence of ethyl alcohol and acetone, an increase is, however, observed in presence of glucose and urea. With gelatin at lower concentration the adsorption of both H+ and SO4″ decreases whilst the reverse is noticed at higher concentrations. It is concluded that the cutting down of the adsorption of either the stabilising or the coagulating ion cannot explain sensitisation or stabilisation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01521201
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  • 9
    Electronic Resource
    Electronic Resource
    Thermodynamics of Cr3+-Cr6+ equilibrium in borate melts (1981)
    Springer
    Journal of materials science 16 (1981), S. 2176-2180 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The Cr3+-Cr6+ equilibrium was studied in lithium and sodium aluminoborate melts in an air atmosphere at different temperatures. A mechanism of the Cr3+-Cr6+ redox reaction in glass melts has been suggested. Enthalpy and entropy of the reaction in molten borates were calculated and the results thus obtained have been discussed thermodynamically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00542378
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of persulphate by arsenite using CuII as a catalyst (1963)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 198 (1963), S. 173-176 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine indirekte volumetrische Persulfatbestimmung beruht auf der durch Kupfer(II) katalysierten Reaktion mit Arsenit. Es wird überschüssige Arsenitlösung zugegeben und mit Permanganatlösung zurücktitriert.
    Notes: Summary An indirect volumetric determination of persulphate is based on the reaction with arsenite catalysed by copper(II). An excess of arsenite is added and permanganate is employed for back titration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00479688
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