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  • 1980-1984  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Origin of the marine magnetic quiet zones in the Labrador and Greenland Seas (1984)
    Springer
    Marine geophysical researches 6 (1984), S. 395-408 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The central part of the northern Labrador Sea is a magnetic quiet zone, and is flanked by regions exhibiting well developed linear magnetic anomalies older than anomaly 24. The quiet zone dies out progressively to the south, where it becomes possible to correlate anomalies between adjacent profiles. A 45 degree change in spreading direction at anomaly 25 time was accompanied by a major jump in ridge position and orientation. As a consequence of this reorganisation, spreading in the northern Labrador Sea next occurred within a rift that was oriented at 45 degrees to the spreading direction, while to the south spreading occurred within in a rift that was orientated at 90 degrees to the spreading direction. Obliquity of spreading changed, between these limits, progressively along the ridge. The quiet zone may be present to the north because the oblique northern geometry resulted in a fragmented ridge composed of many small-offset transform faults joining many short spreading ridge segments. Each magnetic source block produced by magnetisation of sea floor at these small ridge segments will be surrounded by similar small blocks that have opposite polarity, so that none can be resolved at the sea surface. Supporting evidence comes from multi-channel seismic profiles across the Labrador Sea, which show that the basement is more textured within the quiet zone than outside, suggesting the presence of numerous small fracture zones in the quiet zone. A magnetic quiet zone is present in the northern Greenland Sea between margins that are oblique to the spreading direction. In contrast, there are clear lineated magnetic patterns in adjacent areas to north and south where the margins are orthogonal to the spreading direction. This quiet zone may also be due to the geometry of spreading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00286252
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetics and mechanism of oxidation of sulfaguanidine by peroxydisulfate ion (1981)
    Springer
    Reaction kinetics and catalysis letters 18 (1981), S. 415-420 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Обсуждаются результаты кинетических исследований окисления сульфагуанидина с помощью иона пероксидисульфата. N,N'-Бис (гуанил) азоксибензол-п, п'-дисульфонамид был идентифицирован как основной продукт реакции. На основе идентифицированного продукта, а также кинетических данных предлагается радикальный механизм реакции.
    Notes: Abstract Results of the kinetic studies of peroxydisulfate ion oxidation of sulfaguanidine are discussed. N,N'-bis(guanyl)azoxybenzene-p,p'-disulfonamide has been identified as the main oxidation product. On the basis of product identification and kinetic studies a radical mechanism is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02065634
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetics and mechanism of oxidation of sulfasomidine by peroxydisulfate ion (1981)
    Springer
    Reaction kinetics and catalysis letters 17 (1981), S. 359-365 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Обсуждаются результаты кинетического исследования окислсния сульфазомидина (N-(2′,6′-димеил-4′-пиримидил)-4-аминобензол-сульфонамида) с помощью пероксидисульфатного иона в водной среде. В качестве основного продукта окисления был идентифицирован N,N′-бис(2,6-диметил-4-пиримидил)-азоксибензол-п,п′-дисульфонамид. На основе идентификации продукта и кинетических исследований был предложен радикальный механизм.
    Notes: Abstract Results of the kinetic studies of peroxydisulfate ion oxidation of sulfasomidine (N-(2′,6′-dimethyl-4′-pyrimidyl)-4-aminobenzenesulfonamide) in aqueous medium are discussed. N,N′-bis(2,6-dimethyl-4-pyrimidyl)azoxybenzene-p,p′-disulfonamide has been identified as the main oxidation product. On the basis of product identification and kinetic studies a radical mechanism has been proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02065847
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetics of Ag(I) catalyzed oxidation of dioxane by peroxydisulfate (1984)
    Springer
    Reaction kinetics and catalysis letters 24 (1984), S. 167-172 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Обсуждаются кинетические результаты окисления диоксана ионом пероксидисульфата, катализированного Ag(I), полученные иодометрическим методом. Глиоксаль был идентифицирован в качестве основного продукта окисления. На основе кинетических исследовний и образующегося продукта предлагается радикальный механизм протекания реакции.
    Notes: Abstract Kinetic results of Ag(I) catalyzed oxidation of dioxane by peroxydisulfate ion, followed iodometrically, are discussed. Glyoxal has been indentified as the major oxidation product. On the basis of kinetic studies and product formed a radical mechanism is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02069622
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  • 5
    Electronic Resource
    Electronic Resource
    Kinetics and mechanism of oxidation of sulfanilic acid by periodate ion in aqueous medium (1980)
    Springer
    Reaction kinetics and catalysis letters 13 (1980), S. 231-237 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Обсуждаются результаты кинетического исследования окисления сульфаниловой кислоты с помощью металерйодата натрия в водных смесях. Предлагается механизм образования азобензол-4,4′-дисульфоновой кислоты, изолированной и охарактеризованной в качестве ее S-бензилизотиурониевого производного.
    Notes: Abstract Results of kinetic studies of the sodium metaperiodate oxidation of sulfanilic acid in aqueous medium are discussed. A mechanism for the formation of azobenzene-4,4′-disulfonic acid, isolated and characterized as its S-benzylisothiuronium derivative, is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02068571
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  • 6
    Electronic Resource
    Electronic Resource
    Kinetics and mechanism of the oxidation of p-aminobenzoic acid by periodate ion in aqueous medium (1980)
    Springer
    Reaction kinetics and catalysis letters 14 (1980), S. 219-224 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Обсуждаются кинетические результаты окисления п-аминобензойной кислоты периодатом в водной среде. Предлагается механизм, вероятный из кинетики и анализа продуктов.
    Notes: Abstract Kinetic results of the oxidation of p-aminobenzoic acid by periodate ion in aqueous medium are discussed. A suitable mechanism based on kinetic evidence and product analysis is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02061290
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  • 7
    Electronic Resource
    Electronic Resource
    TLC separation of some typical organo-chlorine pesticides (1981)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 306 (1981), S. 25-26 
    Details
    ISSN: 1618-2650
    Keywords: Trenn. von Chlororganoverbindungen, Pesticiden ; Chromatographie, Dünnschicht
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641536
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  • 8
    Electronic Resource
    Electronic Resource
    Chromatographic behaviour of closely related aromatic amines on phenol-impregnated thin-layers (1980)
    Springer
    Chromatographia 13 (1980), S. 353-356 
    Details
    ISSN: 1612-1112
    Keywords: TLC ; Aromatic amines ; Impregnated plates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The TLC behaviour of closely related aromatic amines on silica gel plates impregnated with phenol, o-cresol, p-nitrophenol, quinol, catechol and pyrogallol has been studied. An attempt has been made to correlate the chromatographic behaviour of amines with the equilibrium constants of the adducts formed by the interaction of amines with absorbed phenol. Suitable adsorbent system and solvent systems for an efficient separation of closely related isomers of this class of compound of physiological importance have been developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02290905
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