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  • 1950-1954  (19)
  • 1930-1934  (12)
  • 1
    Electronic Resource
    Electronic Resource
    Occurrence of a Trypanosome in Triatoma rubrofasciatus in Calcutta (1951)
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 35-35 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Of forty-five specimens collected from different parts of Calcutta and examined, thirty-six adult insects and nymphs harboured in their guts a large number of trypanosomes in various stages of development. For the purpose of observation each insect was treated in the following manner. The entire ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/167035a0
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  • 2
    Electronic Resource
    Electronic Resource
    Cation-Exchange Studies with the Colloidal Clay Salts of Silver. (1950)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 54 (1950), S. 1110-1121 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150482a004
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of a Charge on a Colloid and the Mechanism of its Coagulation (1930)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 34 (1930), S. 326-334 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j150308a006
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  • 4
    Electronic Resource
    Electronic Resource
    Die Kinetik langsamer Koagulation (1934)
    Springer
    Colloid & polymer science 68 (1934), S. 316-324 
    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: Zusammenfassung 1. Es werden die bestehenden Ansichten über die Vorgänge bei der langsamen Koagulation einer kritischen Betrachtung unterzogen. 2. Die Gleichung von Smoluchowski erfaßt den Koagulationsvorgang nur, wenn die Konzentration des koagulierenden Elektrolyten groß ist. 3. Bei kleinen Elektrolytkonzentrationen ist die Entladungsgeschwindigkeit der Kolloidteilchen vorherrschend. 4. Die S-förmige Kurve wird bei langsamen Koagulationen nur für eine bestimmte Elektrolytkonzentration gefunden. Auch wird sie bei Solen mit lyophilem Charakter stärker ausgeprägt sein als bei solchen mit lyophobem Charakter. 5. Ist die Elektrolytkonzentration klein, so kann die Gleichung von Smoluchowski zu Beginn anwendbar sein, später trifft sie jedoch nicht mehr zu.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01428622
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  • 5
    Electronic Resource
    Electronic Resource
    Bemerkung über die Bildung von Spiralringen in trocknenden Gelen (1933)
    Springer
    Colloid & polymer science 63 (1933), S. 315-315 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422941
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen über hydratisiertes Zinnoxyd (1953)
    Springer
    Colloid & polymer science 132 (1953), S. 143-145 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01513712
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  • 7
    Electronic Resource
    Electronic Resource
    Liesegang rings of silver chromate (1953)
    Springer
    Colloid & polymer science 133 (1953), S. 32-34 
    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 Es wurde die Wirkung der Löslichkeit von Silberchromat bei der Bildung von Liesegang-Ringen untersucht, da dieses weitgehend unlösliche Salz eine starke Variation seiner Löslichkeit bei Änderung der Wasserstoffionenkonzentration zeigt. Liesegang-Ringe besitzen größere Abstände bei gesteigerter Löslichkeit des Silberchromats durch höhere Azidität des Mediums. Die Ringe werden schärfer, wenn verdünnte Chromatlösungen oder Nitratlösungen verwendet werden. Es müssen beträchtliche Unterschiede in der Konzentration der zwei reagierenden Lösungen bestehen, wobei die von außen diffundierende immer die konzentriertere sein muß. Die günstigsten Konzentrationsverhältnisse wurden bestimmt.
    Notes: Abstracts The effect of the solubility of insoluble silver chromates in the formation of Liesegang rings has been studied as this insoluble salt shows a marked yariation in its solubility with the change in hydrogen ion concentration. The Liesegang rings are less closely packed as the solubility of silver chromate is increased with the increasing acidity of the medium. Rings become more distinct as the chromate solutions used are diluted or the concentrated solution of silver nitrate diffusing from the top is diluted. There should be considerable difference in the concentrations of the two interacting solutions, the one diffusing from the top being always concentrated. Concentrations of the interacting solutions, suited for well defined rings in the gelatin medium, have been determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01513902
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  • 8
    Electronic Resource
    Electronic Resource
    Liesegang rings of silver chromate (1953)
    Springer
    Colloid & polymer science 133 (1953), S. 34-37 
    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 Das kolloide Verhalten von Silberchromat bei Erzeugung periodischer Fällungen besonders in Agar-Agar wurde untersucht. Silberchromat bildet keine stabile kolloide Lösung im Agar-Agar-Sol, doch wurde festgestellt, daß eine kolloide Lösung in Gegenwart von Natriumzitrat-, Binatriumhydrophosphat-, Aluminiumnitrat- und Thoriumnitrat-Lösungen erhalten werden kann. Daher können Liesegang-Ringe bei Gegenwart dieser Salze auch in Agar-Agar-Gelen entstehen. Liesegang- Ringe von Silberchromat in Agar-Agar-Gelen lassen sich auch in Gegenwart von Wasserstoffionen erzeugen, so, wenn statt des Chromates oder der Bichromatlösung Chromsäure verwendet wird. Es sind also bei Bildung von Liese gang-Ringen aus Silberchromat die Bildung eines leicht durch diffundierende Ionen koagulierbaren Kolloids oder steigende Löslichkeit die wichtigen Faktoren.
    Notes: Abstracts The colloidal behaviour of silver chromate in producing periodic precipitation, specially in agar agar medium, has been studied. Silver chromate does not form any stable colloidal solution in agar agar sol but it has been observed by us that its colloidal solution may be obtained in the presence of sodium citrate, disodium hydrogen phosphate, aluminium nitrate and thorium nitrate solutions. Further, Liesegang rings of silver chromate in agar agar gel are formed in the presence of these salts. Liesegang rings of silver chromate are also observed in the agar agar medium in presence of hydrogen ions, when chromic acid is taken in the gel in place of a chromate or dichromate solution. Thus in the formation of Liesegang rings of silver chromate, the formation of a colloid easily coagulable by the diffusing ions or an increased solubility are the important factors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01513903
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  • 9
    Electronic Resource
    Electronic Resource
    Die Viskosität von Eisenphosphatsol bei variierenden Drucken (1933)
    Springer
    Colloid & polymer science 65 (1933), S. 37-44 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01428856
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  • 10
    Electronic Resource
    Electronic Resource
    Hysteresis bei der Sol-Gel-Umwandlung (1930)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 194 (1930), S. 305-315 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19301940125
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