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  • 1960-1964  (13)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 33 (1961), S. 1412-1413 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 34 (1962), S. 841-842 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
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    London : Periodicals Archive Online (PAO)
    Journal of the Economic and Social History of the Orient. 3:2 (1960:Aug.) 238 
    ISSN: 0022-4995
    Topics: Ethnic Sciences , History , Sociology , Economics
    Notes: Reviews
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 50 (1962), S. 701-704 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Organic thiocyanides are cleaved reductively in acid and basic solution by Raney or Devarda alloys. Hydrogen sulfide and hydrogen cyanide, or methylamine result. Micro amounts of organic thiocyanides can be detected through these volatile products. The detection through acid reduction is specific.
    Abstract: Résumé On détruit les thiocyanates organiques par réduction par les alliages de Raney ou de Devarda, en solution acide et basique, ce qui donne naissance à de l'hydrogène sulfuré et à de l'acide cyanhydrique, ou de la méthylamine. En recherchant ces composés volatiles, on peut en tirer des conclusions quant aux micro quantités de thiocyanates organiques. La recherche par réduction acide est spécifique.
    Notes: Zusammenfassung Organische Rhodanide werden durch Raney-oder Devarda-Legierung in saurer und alkalischer Lösung reduktiv aufgespalten, wobei Schwefelwasserstoff und Blausäure bzw. Methylamin entstehen. Aus dem Nachweis dieser flüchtigen Verbindungen läßt sich auf Mikromengen organischer Rhodanide schließen. Der Nachweis durch saure Reduktion ist spezifisch.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 49 (1961), S. 595-598 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The arylsulfinic acids can be selectively detected through the splitting out of sulfur dioxide under the action of mercury(II) chloride, and also through reaction with o-dinitrobenzene, which results in the formation of nitrous acid. Both of these reaction products can be detected by spot reactions.
    Abstract: Résumé Pour rechercher sélectivement les acides arylsulfiniques, on utilise la séparation de l'anhydride sulfureux par action du chlorure de mercure-II ainsi que la transformation par l'o-dinitrobenzène, ce qui engendre de l'acidenitrique. On caractérise les deux produits de réaction par analyse à la touche.
    Notes: Zusammenfassung Zum selektiven Nachweis von Arylsulfinsäuren eignet sich die Abspaltung von Schwefeldioxyd bei der Einwirkung von Quecksilber(II)-chlorid sowie die Umsetzung mit o-Dinitrobenzol, wobei salpetrige Säure gebildet wird. Beide Reaktionsprodukte sind mit Hilfe von Tüpfelreaktionen feststellbar. Es werden mikroanalytische Erfassungsgrenzen erreicht.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 48 (1960), S. 821-826 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary When ether is rapidly evaporated in a micro test tube, there remain behind ether vapors which yield a peroxide at 200° C in contact with air. If this autoxidation, which can be revealed by color reactions with appropriate indicator papers, is conducted on filter paper impregnated with copper acetate-benzidine acetate, the paper turns blue. This result is due to the oxidation of the benzidine to its meriquinoid oxidation product, the oxidation being catalytically hastened by the ether peroxide. This catalysis involves the initiation and constant repetition of plausible partial reactions. The catalytic reaction can be conducted within the spot test techniques for the chemical detection of ether. When mixed with chloroform, 40μg of ether were revealed. The test fails in mixtures of ether with benzene, toluene, carbon disulfide, or petroleum ether. However, it succeeds if small amounts of chloroform or carbon tetrachloride are added to such mixtures. This result is probably to be attributed to a liberation of chlorine by the action of the ether peroxide.
    Abstract: Résumé Par vaporisation rapide d'éther dans un micro-tube à essai, les vapeurs d'éther restent dans celui-ci, et, à 200°, par contact avec l'air, forment un peroxyde. Si l'on effectue cette auto-oxydation, décelable par réaction colorée sur un papier filtre approprié imprégné d'acétate de cuivre/acétate de benzidine, il se développe une couleur bleue intense. Il s'agit là d'une accélération catalytique, provoquée par le peroxyde d'éther, de l'oxydation de la benzidine en son produit d'oxydation mériquinoïde. Cette catalyse se produit par mécanisme plausible de réactions en chaîne. On peut appliquer la réaction de catalyse dans la technique d'analyse à la touche, à la recherche chimique de l'éther. En mélange avec le chloroforme, on peut déceler 40μg d'éther. En mélange avec le benzène, le toluène, le sulfure de carbone ou l'éther de pétrole, la recherche échoue; elle réussit toutefois, après addition de petites quantités de chloroforme ou de tétrachlorure de carbone à ces mélanges, ce qui est probablement à mettre sur le compte d'un départ de chlore provoqué par le peroxyde d'éther.
    Notes: Zusammenfassung Beim schnellen Verdampfen von Äther in einem Mikroproberöhrchen hinterbleiben Ätherdämpfe, die bei 200° und Kontakt mit Luft ein Peroxyd bilden. Wenn diese Autoxydation, die durch Farbreaktionen mit geeigneten Reagenspapieren nachweisbar ist, an einem mit Kupferacetat/Benzidinacetat imprägnierten Filterpapier erfolgt, so wird dieses intensiv blau. Es handelt sich hierbei um eine durch Ätherperoxyd eingeleitete katalytische Beschleunigung der Oxydation des Benzidins zu seinem merichinoiden Oxydationsprodukt. Diese Katalyse kommt durch Eintritt und dauernde Wiederholung plausibler Teilreaktionen zustande. Die Katalysenreaktion kann in der Arbeitsweise der Tüpfelanalyse zum chemischen Nachweis von Äther verwendet werden. Im Gemisch mit Chloroform waren 40μg Äther nachweisbar. Im Gemisch mit Benzol, Toluol, Schwefelkohlenstoff oder Petroläther versagt der Nachweis; er gelingt jedoch nach Zusatz kleiner Mengen Chloroform oder Tetrachlorkohlenstoff zu solchen Gemischen, was wahrscheinlich auf eine durch Ätherperoxyd bewirkte Chlorabspaltung zurückzuführen ist.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 178 (1961), S. 419-428 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Along with the discussion of their chemical background descriptions have been given of: 1. Detection of hexamine through pyrohydrolytic splitting, which leads to formaldehyde and ammonia. 2. Detection of hexamine through sintering with ammonium chloride whereby volatile aliphatic amines result. 3. Detection of hexamine through pyrooxidation with benzoyl peroxide or lead dioxide with production of formaldehyde and ammonia. 4. Detection of benzoyl peroxide through pyrooxidation of hexamine with production of formaldehyde. 5. Detection of triphenylphosphine (-arsine, -stibine, -bismuthine) through formation of polyiodides. 6. Detection of mucic acid through pyroammonolytic formation of pyrrole. 7. Detection of salts of cyclohexylsulfamic acid through formation of sulfate in deamination with nitrous acid. 8. Detection of hippuric acid and derivatives through pyrohydrolytic formation of glycine. 9. Detection of anthraquinone and nuclear-substituted derivatives by reduction to red anthrahydroquinones with sodium hydrosulfite. 10. Detection of dyestuffs with anthraquinone structure through reduction by hydrosulfite with production of anthrahydroqinone derivatives. All of these tests may be conducted by means of the technique of spot test analysis and have microanalytical limits of identification.
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  • 8
    Publication Date: 1961-11-01
    Print ISSN: 0016-1152
    Topics: Chemistry and Pharmacology
    Published by Springer
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  • 9
    Publication Date: 1962-07-01
    Print ISSN: 0026-3672
    Electronic ISSN: 1436-5073
    Topics: Chemistry and Pharmacology
    Published by Springer
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  • 10
    Publication Date: 1961-07-01
    Print ISSN: 0026-3672
    Electronic ISSN: 1436-5073
    Topics: Chemistry and Pharmacology
    Published by Springer
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