ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Properties of urethane elastomers (1988)
    Springer
    Polymer bulletin 20 (1988), S. 195-200 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The thermally stimulated depolarization currents(TSDC) from polyurethanes based on 4,4′-dibenzyle diisocyanate(DBDI) and both saturated and unsaturated polyesters were studied over the temperature range 240–410 °K. Pour relaxation peaks were observed. The structure of the TSDC thermograms, location and intensity of the constituent peaks depend both on the urethane content and thermal history of the polymerr The morphological structure of the samples was evidenced using electron microscopy method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00256115
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Properties of urethane elastomers (1989)
    Springer
    Polymer bulletin 21 (1989), S. 203-207 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The dielectric relaxation processes in polyurethanes based on 4,4′-dibenzyle diisocyanate and saturated polyester in the temperature range of 250–400°K using thermally stimulated depolarization currents method have been investigated. The structure of the relaxation thermograms, location and intensity of the constituent peaks depend both on the precipitation temperature and thermal history of the polymer. The relaxation processes have been associated with the molecular motions within domains with distinct morphological structures. The morphological structure of the samples was evidenced using electron microscopy method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00266174
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Bioactive polymers XXI. Coupling of chloramphenicol on Biozan R (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 620-623 
    Details
    ISSN: 1435-1536
    Keywords: Biozan R ; chloramphenicol ; coupling ; antimicrobial activity ; dicyclohexylcarbodiimide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The coupling of chloramphenicol on Biozan R (Hercules) by activation with dicyclohexylcarbodiimide was studied. The esterification is influenced by the chloramphenicol/dicyclohexylcarbodiimide ratio, concentration of the reactants and reaction time. The microbial tests performed with products of different chloramphenicol contents attest their antimicrobial activity and their possible use, especially in ophtalmology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419885
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    XV. Hydrolases immobilized on Biozan R (1984)
    Springer
    Colloid & polymer science 262 (1984), S. 705-711 
    Details
    ISSN: 1435-1536
    Keywords: Bioactive polymers ; Biozan R ; Immobilized enzymes ; Invertase ; Amyloglucosidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In the present paper the immobilization of invertase and amyloglucosidase on Biozan R with dicyclohexylcarbodiimide as a catalyst is studied. The influence of some factors on the coupling reaction (duration, enzyme/support and catalyst/support ratios) as well on the acitvity of the coupled enzyme in followed. For both systems under study the value of the Michaelis-Menten constant is higher for the coupled enzyme than for the free one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01451542
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Recherches sur la polymerisation des derives acetyleniques (1974)
    Springer
    Journal of thermal analysis and calorimetry 6 (1974), S. 389-399 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On a étudié la stabilité thermique de certains polymères non saturés de la classe des polyacétylènes, tels que polyphénylacétylène, poly-para-chlorophénylacétylène et poly-para-métylphénylacétylène, par les méthodes de l'analyse thermique. On a déterminé les paramètres cinétiques des réactions de destruction thermique tels que l'énergie d'activation et l'ordre de réaction en utilisant la méthode de calcul de Freeman et Carroll. Les polymères ont été synthétisés par le procédé de la polymérisation photochimique, ionique-coordinative et par polycondensation. On a étudié les fractions solubles ainsi que celles qui sont insolubles.
    Abstract: Zusammenfassung Die thermische Stabilität gewisser ungesättigter Polymere der Polyacetylengruppe, wie z. B. des Polyphenylacetylens, Poly-para-chlorphenylacetylens und Poly-para-methylphenylacetylens wurde unter Anwendung der Methoden der thermischen Analyse geprüft. Die kinetischen Parameter der thermischen Zersetzungsreaktionen, wie die Aktivierungsenergie und die Reaktionsordnung wurden unter Anwendung der Berechnungsmethode von Freeman und Carroll bestimmt. Die Polymere wurden durch photochemischen Polymerisierungsvorgang, durch Ionenkoordination und durch Polykondensierung synthetisiert. Sowohl die löslichen, wie die unlöslichen Fraktionen wurden untersucht.
    Notes: Abstract The thermal stabilities of certain unsaturated polymers of the polyacetylene group, such as polyphenylacetylene, poly-p-chlorphenylacetylene and poly-p-methyl-phenylacetylene were investigated by the methods of thermal analysis. The kinetic parameters of the thermal decomposition reactions, e.g. the activation energy and order of reaction, were determined by the method of Freeman and Carroll. The polymers were synthesized by the photochemical polymerisation procedure, by ion coordination and polycondensation. Both the soluble and the insoluble fractions were studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01950070
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Thermal stability of some polyferrocenyleniminoimides and polyferrocenylenazomethines (1981)
    Springer
    Journal of thermal analysis and calorimetry 22 (1981), S. 259-268 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Thermostabilität neuer Ferrocenpolymerer der Klasse von Polyferrocenyleniminoimiden und Polyferrocenylenazomethinen wurde durch Differentialthermoanalyse und Thermogravimetrie untersucht. Es wurde festgestellt, dass die Polyferrocenylenazomethine bis zu 200 °C eine gute Thermostabilität aufweisen und stabiler sind als die Polyferrocenyleniminoimide. Die Gegenwart von Äther-, Sulfid- und Disulfidbrücken in der Diaminkomponente der Polymeren setzt ihre Thermostabilität herab.
    Abstract: Резюме С помощью дифференци ального термическог о анализа и термограви метрии изу-чена термическая устойчи вость новых ферроцен овых полимеров класса пол иферроцени-ленимино имидов и полиферроценилена зометинов. Установлено, что поли ферроцениленазомет ины обладают хорошей тер мической устойчивос тью до 200 °? и более устойчи-вы, чем полиферроцениле ниминоимиды. Наличие в диаминовой компонен те полимера кислородных, сульфид ных и дисульфидных мо стиков, уменьшает термоусто йчивость полимеров.
    Notes: Abstract The thermal stability of new ferrocene polymers from the class of polyferrocenyleniminoimides and polyferrocenylenazomethines was studied by means of differential thermal analysis as well as thermogravimetry. It was established that polyferrocenylenazomethines show good thermal stability up to 200° and are more stable than polyferrocenyleniminoimides. The presence of ethereal, sulphidic and disulphidic bridges in the diaminic component of the polymers decreases their thermal stability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01915273
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Properties of urethane elastomers (1990)
    Springer
    Polymer bulletin 24 (1990), S. 573-576 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The dielectric relaxation processes in poly(azourethaneurea) prepared from diphenylmethane-4,4′-diisocyanate (MDI) and poly(ethylene adipate) glycol were studied in the range 200–390 K using thermally stimulated depolarization currents (TSDC). The TSDC spectra obtained on original sample, annealed sample, and both annealed and stretched sample showed significant differences which were explained in terms of the supramolecular structure of polymers. It was accepted that the polymers have a multiphase supramolecular structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395582
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Synthese und Eigenschaften von ferrocenhaltigen Polymeren Polymerisation des 1-Chlor-l'-äthinylferrocens (1977)
    Springer
    Colloid & polymer science 255 (1977), S. 94-94 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01449688
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Destruction thermo-oxydante de certains materiaux fibreux cellulosiques et de leurs composants (1974)
    Springer
    Journal of thermal analysis and calorimetry 6 (1974), S. 657-672 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On publie une étude sur la destruction thermo-oxydante de quelques matériaux nouveaux du type fibreux ligno-cellulosique, notamment le duvet de peuplier et le duvet d'asclépias. Ce dernier se distingue par une teneur élevée en composants amorphes. On a étudié de même les composants des fibres, la cellulose, l'holocellulose, les hémicelluloses et la lignine, qui avaient été séparés par extraction. Les données expérimentales permettent de classer, selon leurs stabilités thermiques, les composants isolés du matériau initial. L'étude s'étend aussi à l'influence de la structure moléculaire, sur les paramètres cinétiques de la destruction thermo-oxydante. On a estimé, pour chaque composé isolé, les valeurs des énergies d'activation des étapes individuelles de la réaction thermique.
    Abstract: Zusammenfassung Man verfolgte das Verhalten bei thermo-oxydativer Zersetzung von einigen faserigen lignocelluloseartigen Stoffen, namentlich von Pappelflaumhaar, Seidenpflanze und ihren getrennten Komponenten Cellulose, Lignin, Holocellulose und Hemycellulose. Aufgrund der in verschiedenen Temperaturbereichen registrierten Gewichtsverluste hat man die isolierten Komponenten unter Berücksichtigung der Ausgangsprodukte und in Funktion der thermischen Stabilität klassifiziert. Der Einfluß der molekularen Struktur auf die kinetischen Parameter der thermischen Behandlung wurde diskutiert und Aktivierungsenergiewerte errechnet.
    Notes: Abstract The investigation of the oxidative thermal destruction of some new cellulose-type fibrous materials, namely poplar down and down of silkweed is described. The latter are characterized by a high content of amorphous components. The components of the fibres, cellulose, holocellulose, hemicelluloses and lignin, separated by extraction, have also been studied. From the experimental data, the compounds isolated from the original material could be classified according to their thermal stabilities. The influence of the molecular structure on the kinetic parameters of the oxidative thermal destruction has also been studied. The activation energies of the single steps of the thermal reaction have been estimated for each compound isolated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01911786
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Synthesis of some amino acids, sugars, and peptides in cold plasma abiotic synthesis of some high-molecular-weight proteid-like structures (V) (1974)
    New York : Wiley-Blackwell
    Biopolymers 13 (1974), S. 943-954 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of some high-molecular-weight protenoid structures in radiofrequency cold plasma conditions are discussed. The fractionation results of the raw product and the spectrum of free and protenoid-bound amino acids are given. The uv analysis of these compounds is presented.A protein-forming mechanism that might have existed on the primitive earth is proposed.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1974.360130510
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...