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  • Artikel: DFG Deutsche Nationallizenzen  (8)
  • Digitale Medien  (8)
  • Zeitschrift/Serie
  • Loseblatt
  • 1995-1999
  • 1990-1994
  • 1960-1964  (8)
  • 1955-1959
  • 1940-1944
  • 1964  (2)
  • 1962  (6)
  • 1959
  • Dyes/Pigments  (5)
  • Thin layer chromatography  (3)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (8)
Materialart
  • Digitale Medien  (8)
  • Zeitschrift/Serie
  • Loseblatt
Erscheinungszeitraum
  • 1995-1999
  • 1990-1994
  • 1960-1964  (8)
  • 1955-1959
  • 1940-1944
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Gradient and Low-Temperature Thin-Layer Chromatography (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 784-791 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Thin layer chromatography ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The preparation and the use of gradient layers for thin-layer chromatography are described. On a gradient layer there are three flow surfaces, all differing in their separation behavior. It is therefore possible to determine, for example, the basicity and/or activity which gives the optimum separation for a mixture of substances. Gradient thin-layer chromatography was also carried out at low temperatures, after the effect of temperature on the separation of various mixtures had been studied.
    Zusätzliches Material: 12 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196407841
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New Reactive DyesDedicated to Professor H. Bredereck on the occasion of his 60th birthday (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 408-416 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Reactive dyes ; Dyes/Pigments ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Two new groups of reactive dyestuffs have been developed. One group (Levafix® dyes) comprises compounds which contain —SO2NH—CH2—CH2—OSO3H or —CH2—N(alkyl)-CH2—CH2—OSO3H as reactive groups. The dyes of this group react with cellulose fibers to form cellulose ethers, e.g. R—SO2NH—CH2—CH2—O—cellulose. The substances in the second group (Levafix-E® dyes) consist of the amides formed from 2,3-dichloroquinoxaline-6-carboxylic acid and dyestuffs containing primary or secondary amino groups.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196404081
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Mixed-Phase Pigments with Rutile Structures (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 41-45 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Dyes/Pigments ; Rutile structure ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Until the present time, new color pigments have been developed by isotypic and homotypic mixed-phase formation. This paper deals primarily with heterotypic mixed-phase formation for the preparation of new colored and white pigments with the rutile structure. Dioxides and difluorides crystallizing in the rutile lattice-form were chosen as host-lattices for the mixed-phase formation. Hosts of the general formula AB2 can accommodate, as guests, in the form of solid solutions, oxides and/or fluorides with different structures. Characteristically, the mean statistical cation-radius lies between 0.55 and 0.98 Å, with single radii between 0.46 and 0.98 Å. Relative quantities are so chosen that the cation to anion ratio of 1:2 prescribed by the host lattice, as well as electroneutrality, is maintained.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196200411
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Automatic Activity Measurements during the Separation of Radioactive Compounds by Thin-Layer Chromatography (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 580-582 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Radiochemistry ; Thin layer chromatography ; Analytical methods ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A method was developed for continuous automatic measurement of the radioactivity distribution of weak β-emitters on open columns, for example, thin-layer chromatograms. It may be used for analytical separations, as well as for preparative separations on a semi-micro scale. During the measurements the substances are not contaminated by addition of other materials.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196205801
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Heterocyclic Azo Dyes by Oxidative CouplingXXIII. Communication in this series. XII. Communication, S. Hünig and F. Müller, Liebigs Ann. Chem. 651, 89 (1962).Dedicated to Prof. Dr. O. Bayer on the occasion of his 60th birthday. (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 640-646 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Azo dyes ; Dyes/Pigments ; Oxidative coupling ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: New findings in the field of oxidative coupling reactions are reported. These involve: extension of this type of reaction to amidrazone system displaying (vinylogous) tautomerism and to unsymmetrical diarylhydrazines; elucidation of the coupling mechanism for these arylhydrazines and for the amidrazone systems previously described; the properties of some dyes, complexed with heavy metals, and the synthesis of tetraazapentamethine and penta-azapentamethine dyes.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196206401
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Thin-Layer Chromatography of Nucleotides (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 435-439 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Thin layer chromatography ; Nucleotides ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Thin-layer chromatography of nucleotides on DEAE- and ECTEOLA-cellulose is superior to the methods of seperation in use up to the present. Using dilute hydrochloric acid, and without a gradient elution technique, it is possinle to acheive a group seperation of monodi-, and tri-phosphates as well as subfractionation within these groups depending on the basicity of the nucleobases. Thin-layer chromatography is appreciably more sensitive than paper chromatography; 5×10-4 mole adenine neuclotides can be still be detected. The total quantity of material that can be chromatographed without tailing is greater in this procedure than that with paper chromatography; a mixture consisting of 1 μmole ATP and ADP per starting spot can be resolved with ease . Hence the procedure can also be applied for micro-scale preparative seperations . A mixtures of 10-2 μmole ADP and ATP, respectively, can be seperated completely in four to ten minutes.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196204351
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  • 7
    Digitale Medien
    Digitale Medien
    Dyeing of Poly(acrylonitrile) Fibers with Azatrimethinecyanines (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 532-537 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Polyacrylonitrile ; Fibers ; Azatrimethinecyanines ; Dyes/Pigments ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Like all basic dyes, azatrimethinecyanines possess a good dyeing affinity for acrylic fibers. Compounds with isolated nitrogen atoms in the trimethine chain show insufficient light fastness, whereas good to excellent fastness to light is displayed by compounds having neighboring nitrogen atoms in the chain. Thus, a working hypothesis stating that the light fastness of trimethinecyanines on acrylic fibers is improved by progressive replacement of methine groups by nitrogen atoms has been partially confirmed.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196205321
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Reactivity of Dichloro- and Trichloropyrimidyl Dyes and the Sensitivity of their Dyeings to Hydrolysis (1962)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 1 (1962), S. 568-572 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Trichloropyrimidyl dyes ; Dyes/Pigments ; Dichloropyrimidyl dyes ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Several examples are used to show that the reactivity of dichloro- and trichloropyrimidyl dyes and the sensitivity of their dyeings to hydrolysis are determined by the nature of the bridge unit between the chromophore and the reactive system. The tendency of the dyeings to hydrolyze in acid and, more particularly, in alkaline media increases with increasing reactivity of the dyes. In alkaline media, dyeings made with dyes containing oxygen bridges are cleaved mainly between the reactive system and the chromophore, while in dyeings made with dyes containing imino or methylimino bridges, the linkage between the reactive system and the cellulose is hydrolyzed.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196205681
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