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  • 1975-1979  (14)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 48 (1976), S. 89-95 
    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 48 (1976), S. 1236-1239 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 2 (1978), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have identified and described a distinctive type of cell which is characteristic of the ‘mixed’ salivary tumour. This ‘hyaline cell’ or plasmacytoid cell is particularly common and conspicuous in ‘mixed’ tumours of the palate and other sites in the mouth. It occurs also in tumours of the major glands, but with much lesser frequency. The hyaline cell is found in ‘mixed’ salivary-type tumours in other sites, e.g. the skin. It is not present in the other types of salivary tumour, notably adenoid cystic carcinoma, adenolymphoma, mucoepidermoid and acinic tumour. Ultrastructural study suggests that the hyaline cell is an indicator of myoepithelial differentiation. Current concepts of the acceptable pathways of myoepithelial differentiation in ‘mixed’ tumours are discussed briefly. The specificity of the hyaline cell will probably prove valuable in separating ‘mixed’ tumours from monomorphic adenomas, thus retaining the identity of the latter. The hyaline cell is almost as distinctive a feature of ‘mixed’ tumours as is myxochondroid tissue and its specificity is of practical value in the diagnosis and classification of salivary tumours.
    Type of Medium: Electronic Resource
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  • 4
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    Unknown
    London : Periodicals Archive Online (PAO)
    Journal of contemporary history. 10:4 (1975:Oct.) 707 
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 271 (1978), S. 390-390 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IN the mid-1960s, the genetic code had been solved and most of the basic processes in protein biosynthesis defined. During the past ten years, knowledge of the detailed mechanisms has grown enormously by contributions from different disciplines and this is reviewed in the collection of 13 articles ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    Modern Asian studies 9 (1975), S. 433-464 
    ISSN: 0026-749X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Notes: It has been generally accepted for some time that among the most valuable sources for the history of Rājasthān, especially the Rājasthān of the fourteenth to the eighteenth centuries A.D., are the indigenous chronicles (vātas and khyātas), whose existence was well-known even to Tod, but which fell once again into obscurity for the hundred years following the publication of Annals and Antiquities of Rajast'han in 1829–32. It is therefore a matter of no small pleasure that, during the past decade or so, many of these texts have at last been finding their way into print. Our thanks in this matter are particularly due to the Rajasthan Oriental Research Institute centred in Jodhpur and to the Sadu} Rajasthani Research Institute of Blkaner, who have led the field in the publication of Rajasthani works of both historical and literary interest. This activity on the part of the publishers will certainly add impetus to research on mediaeval Rajasthan, and for this reason, as well as the obvious philological interest of a language as fully-attested and yet linguistically isolated as that of the Rajasthani prose chronicles, it has seemed worth while to prepare these grammatical notes.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 31 (1975), S. 323-326 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Rezeptive Felder von 32 Zellen im primärvisuellen äusseren Teil des Grosshirns unbetäubter, abgerichteter Affen wurden abgesteckt. Davon zeigten 97% der Zellen Vergrösserung der eckigen Abmessungen auf der nahen Fläche. Diese Grösse-Einstellung unterstützt unsere Vorstellung eines «Zoom-Modells» der Grössen-Konstanz.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 11 (1977), S. 423-430 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Application de la nouvelle technique d'analyse des particules organiques à l'étude des réactions de décomposition thermique de divers types de composés organiques (par ex. les acétylacétonates métalliques, les isocyanates bloqués, les alkyldithiocarbamates métalliques, les acides arénosulfoniques et leurs sels aminés). A quelques exceptions près, la plupart des composés de ces différentes classes montrent de fortes caractéristiques d'organoparticulation aux températures inférieures à 200°, qui se manifestent par leur influence sur le courant de sortie d'un détecteur à chambre d'ions. Il n'a pas été possible, en général, de mettre en évidence une corrélation directe entre les températures de fusion et de décomposition et les intervalles des températures de l'organoparticulation des composés. Dans plusieurs cas, les valeurs de l'intervalle des températures d'organoparticulation étaient nettement supérieures ou nettement inférieures au point de fusion connu et aux températures de décomposition des composés. Afin d'expliquer les propriétés d'organoparticulation de ces composés, l'association en phase vapeur de molécules polaires (par ex. les phénols, les amines, les acides carboxyliques, etc.) semble être nécessaire pour donner des organoparticules de grandeur décelable par les instruments actuels. Une autre possibilité serait la formation d'une suspension “aérosol” de molécules organiques dans des gaz comme SO2, CS2, CO2, qui pourrait se produire avec quelques-uns de ces composés.
    Abstract: Zusammenfassung Die neue Technik der organischen Partikelanalyse wurde zur Untersuchung der thermischen Zersetzungsreaktionen verschiedener Typen organischer Verbindungen (z. B. Metall-Acetylacetonate, blockierte Isocyanate, Metall-Alkyldithiocarbamate, Arensulfonsäuren und ihre Aminsalze) eingesetzt. Mit einigen Ausnahmen weist der Grossteil dieser Verbindungsklassen starke, bei Temperaturen unter 200ℴ organische Partikelcharakteristika auf, wie an Hand ihrer Wirkung auf den austretenden Strom eines Ionenkammerdetektors nachgewiesen werden kann. Im Allgemeinen konnte kein direkter Zusammenhang zwischen den Schmelz- und Zersetzungstemperaturen und den Temperaturbereichen der Organopartikulierung der Verbindungen festgestellt werden. In mehreren Fällen lagen die Temperaturbereiche der Organopartikulierung deutlich oberhalb oder unterhalb des bekannten Schmelzpunktes und der Zersetzungstemperaturen der Verbindungen. Um die organopartikulierenden Eigenschaften dieser Verbindungen zu erklären, scheint eine Dampfphasenassoziierung polarer Moleküle (wie z. B. Phenole, Amine, Carbonsäuren, usw.) nötig um mit der derzeitigen Instrumentierung nachweisbare Partikelgrössen zu ergeben. Als andere Möglichkeit könnte die Bildung einer “Aerosol”-Suspension organischer Moleküle in Gasen (wie z. B. SO2, CS2, CO2) bei einigen dieser Verbindungen gesehen werden.
    Notes: Abstract The new technique of organoparticulate analysis has been used to investigate the thermal decomposition reactions of various types of organic compounds (i.e., metal acetylacetonates, blocked isocyanates, metal alkyldithiocarbamates, arenesulfonic acids and their amine salts). With a few exceptions, most of the compounds in these classes exhibit strong organoparticulation characteristics at temperatures below 200° as indicated by their influence on the output current of an ion chamber detector. In general, no direct correlation between the melting and decomposition temperatures and their organoparticulation temperature ranges was evident. In several instances, the organoparticulation temperature range values lay well above or well beneath the known melting point and decomposition temperatures of the compounds. To explain the organoparticulating properties of these compounds, vapor phase association of polar molecules (such as phenols, amines, carboxylic acids, etc.) would appear to be necessary to give organoparticulate sizes detectable with the present instrumentation. Alternatively, the formation of an “aerosol” suspension of organic molecules in gases, such as SO2, CS2, CO2, might be occurring with some of these compounds.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 1385-1396 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Quaternary phosphonium compounds have been found to be extremely effective latent accelerators for anhydride-cured bisphenol A epoxy resins; at concentrations from 0.01% to 0.25%, fast gel times are found in the temperature range of 135°-200°C combined with very good storage properties at ambient temperatures. Using these materials as accelerators, it is possible to formulate long-life, one-component epoxy resins. From gel time data, Arrhenius plots were made for some of these phosphonium compounds, and results indicate low activation energy values of the order of 16.1 kcal/mole. Reaction mechanisms are proposed to explain the effectiveness of these phosphonium compounds as latent accelerators. The initiation mechanism probably involves the formation of hydrogen-bonded phosphonium-epoxy or phosphonium-anhydride complexes which rearrange on the application of heat to form activated species resulting in polymerization of the epoxy-anhydride components. The transfer of a proton from the phosphonium complex(es) to other epoxy or anhydride molecules would appear to be the rate-determining step in this initiation mechanism. Comparison of other well-known accelerators used for the anhydride cure of bisphenol A epoxy resins shows quaternary phosphonium compounds to be among the most effective accelerators disclosed to date.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 1411-1418 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electroinitiated polymerizations of styrene, 2-vinylnaphthalene, and 9-vinylanthracene were compared in sulfolane and acetone solvents in the presence of ZnCl2. The relative orders of polymerization rates and polymerization efficiencies, in both solvents, were 9-vinylanthracene 〉 2-vinylnaphthalene 〉 styrene, with faster rates and higher efficiencies occurring in sulfolane. Data obtained from viscosity and gel permeation chromatography (GPC) studies indicate that the molecular weights of the polymers produced in these systems are extremely low, 〈5000. Chemical composition and infrared (IR) spectral data suggest that abnormal transfer reactions (possibly from solvent) may be occurring in the electroinitiated 9-vinylanthracene polymerizations. The polymerization mechanism appears to be cationic in these monomer-solvent systems with ZnCl2.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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