Impact of dry heating on physicochemical properties of corn starch and lysine mixture.
Corn starch was modified with lysine by dry heat treatment and to investigate how they can affect the pasting and structural properties of the treated starches. Dry heating with lysine reduced the pasting temperature and resulting in viscosity increase. The particle size of heated starch-lysine mixture increased, suggesting that starch granules were cross-linked to lysine. After dry heating, the onset temperature, peak temperature and conclusion temperature of corn starch-lysine mixture were lower than those of other starches. The degree of crystallinity decreased for the starch after dry heat treatment while these heated starch samples still have the same X-ray diffraction types as the original starch.
College of Life Sciences, Dalian Nationalities University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China.
Ying
Y
Ji
College of Life Sciences, Dalian Nationalities University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China. Electronic address: yujc@dlnu.edu.cn.
Jicheng
J
Yu
College of Life Sciences, Dalian Nationalities University, 18 Liaohe Road West, Dalian Economic and Technological Development Zone, Dalian 116600, China.
Yongbin
Y
Xu
Dalian Development Area No.1 High school, Dalian Economic and Technological Development Zone, Dalian 116600, China.
Yinghui
Y
Zhang
D055598:Chemical Phenomena; D003460:Crystallization; D003890:Desiccation; D006358:Hot Temperature; D008239:Lysine / Q000737:chemistry*; D010316:Particle Size; D013213:Starch / Q000737:chemistry*; D013696:Temperature; D014783:Viscosity; D014961:X-Ray Diffraction
D013213:Starch; D008239:Lysine
Corn starch; Dry heat treatment; Lysine; Pasting properties; Structural properties