Physicochemical parameters of partially hydrolyzedS. salivarius levan fractions

Autor:	J. E. Zweig, Salvatore S. Stivala
Rok vydání:	1981
Předmět:	biology Molecular mass Chemistry Organic Chemistry Biophysics Analytical chemistry General Medicine biology.organism_classification Biochemistry Gyration Biomaterials Crystallography Viscosity Hydrolysis Streptococcus salivarius SPHERES
Zdroj:	Biopolymers. 20:605-619
ISSN:	1097-0282 0006-3525
DOI:	10.1002/bip.1981.360200311
Popis:	The fractions obtained from the partially hydrolyzed branched Streptococcus salivarius levan were examined in solution. Sedimentation coefficients, S0, intrinsic viscosities, [η], weight-average molecular weights, Mw, and radii of gyration were obtained from sedimentation velocity, viscosity, and light-scattering measurements. Double logarithmic plots of [η] vs Mw and S0 vs Mw each yielded two linear segments intersecting at Mw ≈ 105. Hydrodynamic data suggest that fractions of Mw > 105 behave as compact spheres, whereas for Mw < 105, the particles are best characterized as linear random coils. Calculations based on theories of random coils and spheres support the above observations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8e89b454d358b1c15f8674a8132b77ec https://doi.org/10.1002/bip.1981.360200311 Zobrazit plný text záznamu Plný text