TY - JOUR
T1 - Retrogradation of Maize Starch after High Hydrostatic Pressure Gelation: Effect of Amylose Content and Depressurization Rate
AU - Yang, Zhi
AU - Swedlund, Peter
AU - Gu, Qinfen
AU - Hemar, Yacine
AU - Chaieb, Saharoui
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We acknowledge the support of the plant and food research institute in providing the high pressure equipment used in this work. We thank Mr. Graeme Summers from Plant & Food Research Ltd. for his technical assistance. SC thanks KAUST for support.
PY - 2016/5/24
Y1 - 2016/5/24
N2 - High hydrostatic pressure (HHP) has been employed to gelatinize or physically modify starch dispersions. In this study, waxy maize starch, normal maize starch, and two high amylose content starch were processed by a HHP of the order of 600 MPa, at 25°C for 15min. The effect of HHP processing on the crystallization of maize starches with various amylose content during storage at 4°C was investigated. Crystallization kinetics of HHP treated starch gels were investigated using rheology and FTIR. The effect of crystallization on the mechanical properties of starch gel network were evaluated in terms of dynamic complex modulus (G*). The crystallization induced increase of short-range helices structures were investigated using FTIR. The pressure releasing rate does not affect the starch retrogradation behaviour. The rate and extent of retrogradation depends on the amylose content of amylose starch. The least retrogradation was observed in HHP treated waxy maize starch. The rate of retrogradation is higher for HHP treated high amylose maize starch than that of normal maize starch. A linear relationship between the extent of retrogradation (phase distribution) measured by FTIR and G* is proposed.
AB - High hydrostatic pressure (HHP) has been employed to gelatinize or physically modify starch dispersions. In this study, waxy maize starch, normal maize starch, and two high amylose content starch were processed by a HHP of the order of 600 MPa, at 25°C for 15min. The effect of HHP processing on the crystallization of maize starches with various amylose content during storage at 4°C was investigated. Crystallization kinetics of HHP treated starch gels were investigated using rheology and FTIR. The effect of crystallization on the mechanical properties of starch gel network were evaluated in terms of dynamic complex modulus (G*). The crystallization induced increase of short-range helices structures were investigated using FTIR. The pressure releasing rate does not affect the starch retrogradation behaviour. The rate and extent of retrogradation depends on the amylose content of amylose starch. The least retrogradation was observed in HHP treated waxy maize starch. The rate of retrogradation is higher for HHP treated high amylose maize starch than that of normal maize starch. A linear relationship between the extent of retrogradation (phase distribution) measured by FTIR and G* is proposed.
UR - http://hdl.handle.net/10754/614421
UR - http://dx.plos.org/10.1371/journal.pone.0156061
UR - http://www.scopus.com/inward/record.url?scp=84971539258&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0156061
DO - 10.1371/journal.pone.0156061
M3 - Article
C2 - 27219066
SN - 1932-6203
VL - 11
SP - e0156061
JO - PLoS ONE
JF - PLoS ONE
IS - 5
ER -