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  • 1
    Electronic Resource
    Electronic Resource
    Cold abiotic conditions and the formation of protomembranes (1989)
    Springer
    Origins of life and evolution of the biospheres 19 (1989), S. 293-294 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02388855
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  • 2
    Electronic Resource
    Electronic Resource
    Reactivity of some acetylenic derivatives in electroinitiated polymerization (1985)
    Springer
    Polymer bulletin 14 (1985), S. 117-122 
    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 charge distribution in phenylacetylene, methyl propiolate, diphenyldiacetylene as well as in their anion-radieals was calculated by GNDO/2 and EHT methods. According to the obtained results, the electroinitiated polymerization of these monomers takes place by their direct reduction. A good agreement between theoretical and electroanalytical data was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00708468
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  • 3
    Electronic Resource
    Electronic Resource
    Azo peroxide initiators (1986)
    Springer
    Polymer bulletin 16 (1986), S. 235-241 
    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 Azo diacyl peroxide compounds have been successfully used as sequential bifunctional initiators, in reactions of radicalic polymerization of vinyl monomers, for block copolymer obtaining. Resuming previous investigations, the 0-[4-(t-butylazo)-4-cyanovaleryl]-0'-actyl-peroxide has been synthesized; this is a new azo diacyl peroxide compound, obtained either by the direct condensation of the 4-(t-butylazo)-4-cyanovaleric acid(the BACV acid) with peracetic acid — under the dehydrating action of the dicyclohexylcarbodiimide — or from the chloride of the respective acid by treatment with peracetic acid in the presence of pyridine. The initiator structure is confirmed by the characteristics evidenced by IR and H-NMR, as well as by the 13C-NMR spectra. The synthesized product may be kept, in cold conditions, for a long time; nevertheless, by contact with a base it manifests the tendency of changing itself into a symmetrical azo diacyl peroxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00254991
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  • 4
    Electronic Resource
    Electronic Resource
    Bifunctional initiators: synthesis of phenylazo-formamidoethyl 4-t-butylazo-4-cyanovalerate (1987)
    Springer
    Polymer bulletin 18 (1987), S. 13-17 
    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 paper deals with the synthesis of the phenylazo-formamidoethyl 4-t-butylazo-4-cyanovalerate, a product which — by its two azo groups having different thermal stabilities — may be used in initiating processes of stepwise radicalic polymerization. The preparation is based on the condensation of the 4-t-butylazo-4-cyanovaleric acid chloride with N-hydroxy ethyl-phenylazoformamide (HEPF) in anhydrous chloroform, in the presence of pyridine. The initiator purification involves its passing over an alumina column, on using methylene chloride as eluent. HEPF is a new intermediate obtained by the reaction of the ethyl phenylazocarboxylate with ethanolamine. Both the HEPF structure and that of the bis-azo initiator is confirmed by elemental analysis and spectroscopic measurements (IR and H-NMR spectra), as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255816
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  • 5
    Electronic Resource
    Electronic Resource
    A critical reevaluation of reactivity ratio data in radical copolymerization of acetylene monomers (1980)
    Springer
    Polymer bulletin 2 (1980), S. 63-69 
    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 Using the copolymerization equation proposed by Kelen and Tüdös, 25 radical copolymerization systems implying acetylenic and vinylic monomers were reexamined. Of these, only 12 can be characterized by the usual terminal copolymerization model. 5 systems present high scattering of experimental data given by the original authors; 2 systems belong to another copolymerization mechanism, and 6 give meaningless reactivity ratio values. The copolymerization equation proposed by Zaitsev et al. for radical copolymerization of acetylenic monomers could not be accepted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275555
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  • 6
    Electronic Resource
    Electronic Resource
    Chemical synthesis of some Schiff base-type polymers containing pyrrole units (1994)
    Springer
    Polymer bulletin 32 (1994), S. 257-264 
    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 synthesis of three Schiff-base type monomers containing pyrrole units was performed. Their polymerization was carried out by chemical oxidation with (NH4)2S2O8. Some preliminary thermal and electrical properties were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00308535
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  • 7
    Electronic Resource
    Electronic Resource
    Semiconduction theory (1980)
    Springer
    Cellular and molecular life sciences 36 (1980), S. 1264-1267 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Conclusions The semiconducting properties of biomacromolecules are a certainty which cannot be neglected when models are proposed for explaining some biological function such as, enzymatic activity of cytochrome oxidase, olfactory transduction, visual reception, properties of the cellular membranes, etc.6,7,9. Although a perfect correlation does not yet exist between the results of molecular orbital calculations and experimental data regarding the electrical conduction in proteins and nucleic acids9, a profound study on the aspects connected with intrinsic mechanisms of conduction in biomacromolecules, as well as on dependence of electrical properties on the impurities acting in vivo, should increase our understanding of biophysical phenomena.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01969582
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  • 8
    Electronic Resource
    Electronic Resource
    Plasma-induced polymerization (1980)
    Springer
    Polymer bulletin 2 (1980), S. 809-815 
    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 High molecular weight methyl methacrylate (M1) — styrene (M2) copolymers were obtained by plasma-induced bulk copolymerization. The reactivity ratios, determined by Kelen — Tüdös method, were shown to be r1=0.41±0.01 r2=0.57±0.01 and the coisotactic alternating addition probability G=0.48±0.02. These data indicate a radical mechanism of copolymerization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255508
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  • 9
    Electronic Resource
    Electronic Resource
    New phenothiazine-containing monomers and polymers (1981)
    Springer
    Polymer bulletin 5 (1981), S. 233-238 
    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 Three new phenothiazine-containing electrono-donor monomers: methacryloyl-2′-hydroxyethyl-2-(N-phenothiazinyl)propionate (i) acryloyl-2′-hydroxyethyl-2-(N-phenothiazinyl) propionate (ii) and 2-(N-phenothiazinyl) propionic acid vinyl ester (iii) were synthesized and radically polymerized. The ionization potentials of poly(i), poly(iii) and of the model for the structural unit of the acrylic polymers: acetyl-2′-hydroxyethyl-2-(N-phenothiazinyl) propionate determined with two small acceptors were discussed in terms of sterical hindrances.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265170
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  • 10
    Electronic Resource
    Electronic Resource
    New fluorene containing monomers and polymers (1980)
    Springer
    Polymer bulletin 2 (1980), S. 51-56 
    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 synthesis of five novel electrono-donor monomers containing fluorene (2-fluorenyl acrylamide, 2-fluorenyl methacrylamide, 2-(1-hydroxyethyl)fluorenyl acrylate, 2-(1-hydroxyethyl)fluorenyl methacrylate and 9-fluorenyl acrylate) and of the corresponding polymers is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275553
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