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  • Polymer and Materials Science  (3)
  • 550 - Earth sciences
  • Relativistic Nuclear Collisions
  • Superfluidity and superconductivity
  • 1965-1969  (3)
Collection
Keywords
  • Polymer and Materials Science  (3)
  • 550 - Earth sciences
  • Relativistic Nuclear Collisions
  • Superfluidity and superconductivity
  • Chemistry  (3)
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 5 (1967), S. 1-4 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Investigations have been made on the optical rotatory dispersion properties of E. coli ribosomes and their constituent RNA and proteins. The results indicate that (1) no conformational changes are involved in the formation of a 70S particle from the 50S and 308 subunits, (2) the E. coli ribosomal proteins are similar to most globular proteins with little α-helix content, and (3) the conformation of RNA and proteins inside the ribosome is very similar to that in the free state.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 4 (1966), S. 623-636 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Optical rotatory dispersions between 200 and 600 mμ are presented for mononucleosides and 5′-mononucleotides in neutral, acid, and in some cases alkaline solutions. All display a single Cotton effect in the ultraviolet region (above 220-240 mμ); the purine ones are negative in sign and the pyrimidine ones positive, with the crossovers (zero rotations) in most cases close to the wavelengths of their respective absorption maxima. The visible rotatory dispersions obey the one-term Drude equation, except for TMP and UMP, which show anomalous dispersions. The rotational strengths of the dichroic bands were estimated from the Cotton effect profiles; cytosine mononucleotides and mononucleotides show the strongest rotational strengths among the compounds studied.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 111 (1968), S. 36-49 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Viskosimetrische und osmometrische Messungen an Fraktionen von Poly-m-methyl-styrol wurden in Benzol, Cyclohexan und Äthylacetat bei 30, 40 und 50°C ausgeführt. Die K′- und a-Werte der KUHN-HOUWINK-Gleichung werden für diese Lösungsmittel an gegeben. Die Werte des Kettenendenabstandes (r20/M)1/2, der Wechselwirkungskonstante B zwischen Lösungsmittel und Polymerem und der Konformationsparameter σ werden unter Anwendung der Theorien von FLORY-FOX-SCHAEFGEN-ROIG und STOCKMAYER-FIXMAN berechnet. Die Anwendbarkeit der Theorien von FLORY, KURATA und Mitarb., sowie PTITSYN wurde in bezuG auf die Abhängigkeit des Expansionskoeffizienten α vom Molekulargewicht kritisch untersucht, ebenso werden die Werte der thermodynamischen Parameter Θ, Ψ1, x1 und X1 berechnet.
    Notes: Viscometric and osmometric studies have been carried out with fractions of poly(mmethyl styrene) in solutions of benzene, cyclohexane, and ethyl acetate at 30, 40, and 50°C. The values of K′ and ‘a’ in the KUHN-HOUWINK relation have been reported for the above polymer-solvent systems. The values of unperturbed dimension, (r20/M)1/2, solvent polymer interaction constant (B) and conformational parameter (σ) have been computed applying the theories of FLORY-FOX-SCHAEFGEN, KURATA-STOCKMAYER-ROIG, and STOCK-MAYER-FIXMAN. The applicability of the theories of FLORY, KURATA et al., and PTITSYN has been critically analysed from the dependence of the expansion factor (α) on molecular weight. Values of thermodynamic parameters, Θ, Ψ1, x1, and X1, have also been calculated.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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