Crystallite orientation maps in starch granules from polarized Raman spectroscopy (PRS) data

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Leonardo Galvis
  • Carlo G. Bertinetto
  • Jean Luc Putaux
  • Nicole Montesanti
  • Tapani Vuorinen

Organisaatiot

  • Universite de Grenoble
  • CNRS, CERMAV Grenoble

Kuvaus

In this work, polarized Raman spectroscopy (PRS) was used to determine orientation maps of crystallites present in Phajus grandifolius starch granules based on the anisotropic response of the glycosidic Raman band at 865 cm−1. The response of this band was preliminarily evaluated using model A-amylose crystals as standard. The A‐amylose crystals oriented “in plane” showed a maximal intensity ratio of ∼3.0 for bands 865/1343 cm−1 when the polarization of the laser was along the chain axis of the crystal, i.e., parallel to the axis of the amylose double helices, and a minimal intensity ratio of ∼0.25 when perpendicular. The orientation maps of Phajus grandifolius starch granules showed two distinct regions: one isotropic and the other with a highly anisotropic response. The origin of the difference might be changes in both organization/concentration and orientation of the crystallites across the starch granules.

Yksityiskohdat

AlkuperäiskieliEi tiedossa
Sivut70-76
Sivumäärä7
JulkaisuCarbohydrate Polymers
Vuosikerta154
TilaJulkaistu - 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Lataa tilasto

Ei tietoja saatavilla

ID: 9146605