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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 89 (1973), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Fresh, not chemically fixed, glycerol-cryoprotected material from skin lesions of histiocytosis-X (Letterer-Siwe disease) was examined by the freeze-fracture technique. Fracture appearances of the cytoplasmic X-granules characteristic of cells of histiocytosis-X were established, and the accuracy of previous three-dimensional reconstructions of variations, in overall shape of granules based upon stained thin sections was confirmed. These variations, therefore, are not artifacts of conventional tissue processing. Little or nothing of the internal structure of X-granules is seen in replicas, and the technique provides no new information concerning their origin or mode of formation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 83 (1970), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: SUMMARY.— Clinical, histological and ultrastructural features of digital fibrous swellings in children are described. The clinical progress of these cases indicates that the lesions tend to regress spontaneously, and that they are recurrent only in the sense that growth may continue after incomplete surgical excision. A characteristic feature of the lesions is the occurrence of cells with dense cytoplasmic deposits. These cells appear to be abnormal fibroblasts, but electron microscopy provides no clues as to the origin, nature, or causation of the cytoplasmic deposits. No evidence was obtained to support a suggestion that the lesions may have an infective viral origin. Elastic fibres were very scarce within the swellings, and showed some evidence of abnormality. Collagen fibres, constituting the bulk of the swellings, appeared essentially normal.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 250 (1974), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 6 (1974), S. 159-173 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Nous présentons les résultats de la décomposition thermique du dimanganèse et du dirhénium décacarbonyle étudiée par TG directe et dérivée et par AGD. L'identification des produits de la thermolyse à différentes températures et atmosphères a été effectuée par diffraction des rayons X. En atmosphère inerte, le comportement de Mn2(CO)10 diffère peu de celui de Re2(CO)10, le premier éiant moins stable que le second. En atmosphère oxydante, nous avons observé une différence de comportement entre Mn2(CO)10 et Re2(CO)10. Les produits identifiés de la thermolyse à 350
    Abstract: Zusammenfassung Die Ergebnisse der thermischen Zersetzung von Dimangan- und Dirhenium-Decacarbonyl, welche durch direkte und derivierte TG, sowie durch DTA erhalten wurden, werden beschrieben. Die Identifizierung der Produkte der Thermolyse bei verschiedenen Temperaturen und in verschiedenen Atmosphären wurde mittels Röntgendiffraktion durchgeführt. In inerter Atmosphäre unterscheidet sich das Verhalten des Mn2(CO)10 wenig von dem des Re2(CO)10, ersteres ist weniger beständig als letzteres. In oxydierender Atmosphäre wurde ein unterschiedliches Verhalten von Mn2(CO)10 und Re2(CO)10 beobachtet. Die identifizierten Produkte der thermischen Zersetzung bei 350
    Notes: Abstract The thermal behaviours of dimanganese decacarbonyl and dirhenium decacarbonyl were studied by TG, DTG and DTA. The decomposition products in different media were identified by X ray diffraction. In an inert medium, no important difference is observed between the two compounds. In an oxidizing medium, the identified products at 350
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Major factors which determine the distribution of internal energy of a primary product ion A+, P(E)A+, at formation are delineated in terms of the quasi-equilibrium theory and a variety of experimental evidence is offered to support these conclusions. These major factors include: the P(E) of the molecular ion, the rate constants as a function of energy, κ(E), for M+·→A+ + N0 and for competing reactions of M+·, and the partitioning of excess internal energy between A+ and N0. The ‘fluctuation effect’ on this partitioning makes P(E)A+ relatively insensitive to many structural and energy changes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 1217-1222 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple computerized electron distribution difference method has been developed using a conventional mass spectrometer and an on-line computer. Using the system, ionization potentials for various propyl halides were measured and found to agree well with photoionization data. The appearance potentials for [C3H7]+ agreed well with literature values, except for 1-propyl bromide and 1- propyliodide which gave values approximately 0.7 eV lower than previous reports. The results are interpreted to indicate threshold formation of the sec-propyl ion from all propul halides.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 316 (1974), S. 434-442 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N2-Aryl-N1,N1-dialkylchlorformamidine 1 reagieren mit Oximen über hydrolyseempfindliche Zwischenprodukte zu 2-Hydroxy-1-aryl-3,3-dialkylguanidinen 3.Diese Hydroxyguanidine bilden mit Benzoylchlorid O- und O,N-acylierte Verbindungen, mit Chlorameisensäureestern entstehen 3-Dialkylamino-4-aryl-5-oxo-Δ2-1,2,4-oxadiazoline 7. Die Reaktion mit Alkylhalogeniden führt zu 2-Alkoxy-1-aryl-3,3-dialkylguanidinen 8, und die katalytische Hydrierung liefert 1-Aryl-3,3-dialkylguanidine. Bei der Abspaltung der Oximinogruppe im saure Medium in Gegenwart von Oxydationsmitteln entstehen entsprechend substituierte Harnstoffe.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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