Title

Effects of heat moisture treatment with erythritol on the physicochemical properties of wheat starch.

Authors

Sun, Qingjie; Dai, Lei; Nan, Chong; Ji, Na; Xiong, Liu

Abstract

Wheat starch was impregnated with erythritol and subjected to heat moisture treatment (HMT) (100°C, 20% moisture, 12 h). The effects of HMT on the pasting, thermal, and morphological properties of the treated wheat starch-erythritol mixture (H-WSEM) were evaluated. The peak viscosity, trough viscosity, final viscosity, and breakdown of H-WSEM markedly decreased, whereas pasting temperature increased. Compared with the To, Tp, and Tc of the untreated wheat starch-erythritol mixture (WSEM), those of H-WSEM considerably increased; unlike the Δ H of WSEM, that of H-WSEM decreased. SEM showed that numerous erythritol granules appeared on the surface of the starch granules in WSEM, but that the H-WSEM surface was smooth and irregular. Compared with the holes of the WSEM gel, those of the H-WSEM gel were smaller and were characterized by a thinner matrix surrounding the pores. The XRD patterns revealed that the amorphous region of H-WSEM was larger than that of WSEM.

Subjects

WHEAT starch; HUMIDITY; VISCOSITY; CONDENSATION (Meteorology); CONDENSATION

Publication

Starch / Staerke, 2014, Vol 66, Issue 5/6, p496

ISSN

0038-9056

Publication type

Academic Journal

DOI

10.1002/star.201300203