Properties of β-Glucan Films from Intact and Disintegrated Saccharomyces cerevisiae Cells

  • M. Novák Department of Carbohydrate Chemistry and Technology,
  • A. Synytsya Department of Carbohydrate Chemistry and Technology,
  • G. K. Gomba Department of Carbohydrate Chemistry and Technology,
  • A. Hejlová Department of Mathematics,
  • J. Blahovec Department of Physics, Czech University of Life Sciences, Prague
  • O. Gedeon Department of Glass and Ceramics,
  • P. Slepička Department of Solid State Engineering,
  • J. Maixner Central Laboratories, Institute of Chemical Technology, Prague,
  • J. Čopíková Department of Carbohydrate Chemistry and Technology,

Abstrakt

Insoluble polysaccharide fractions containing β-glucans as the main component were isolated from intact and disintegrated cells of yeast Saccharomyces cerevisiae. Films prepared from both these crude glucans as well as raw materials themselves were analysed by FTIR spectroscopy and structure, thermal and mechanical properties of the films were investigated using SEM, AFM, XRD, XRF, DSC and tensile tests. β-Glucan preparations from disintegrated cells had less amount of α-glucans than those obtained from intact cells. Films originated from disintegrated cells were more homogeneous, while crystallinity was more pronounced at films from intact cells. Glass transition of the both types of films underwent at the same temperature. Films from disintegrated cells were less thermo stable, stronger and less elastic than those prepared from intact cells.
Publikované
2012-01-15
Sekce
Články