Comparison of thermodynamic parameters and viscosity parameters of small and medium-sized and large starch grains in maize

doi:10.16178/j.issn.0528-9017.20230749

Abstract

Abstract:

In order to analyze the relationship between thermodynamic parameters and viscosity parameters of small and medium-sized and large starch grains in mature maize, 11 different types of maize varieties were used as materials to isolate small and medium-sized and large starch grains. The thermodynamic parameters and viscosity parameters of two types of starch granules were compared. Small and medium-sized starch grains and large starch grains were separated considerably. There were significant differences in starch viscosity parameters among different varieties. The initial gelatinization temperature, peak gelatinization temperature and gelatinization enthalpy of large starch grains were higher than those of small and medium-sized starch grains. The peak viscosity, trough viscosity, breakdown, final viscosity and setback of small and medium-sized starch grains were significantly higher than those of large starch grains. Compared with large starch grains, the peak viscosity, trough viscosity and breakdown value of small and medium-sized starch grains in kernel endosperm of maize at mature stage were higher. It shows that the structure of small and medium-sized starch grains is compact, which is difficult to gelatinize compared with large starch grains.

Key words: maize, starch grains, thermodynamic parameters, viscosity parameters

CLC Number:

S513

ZHANG Yating, HU Jian, YU Mengqi, LU Mengli, CHENG Jiahui, LI Wenyang. Comparison of thermodynamic parameters and viscosity parameters of small and medium-sized and large starch grains in maize[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(10): 2451-2455.

Figures/Tables 5

References 25

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类型	中小型淀粉粒组/%	大型淀粉粒组/%
中小型淀粉粒	93.65±0.37 a	13.78±1.33 a
大型淀粉粒	6.16±0.32 b	86.22±1.33 b

类型	中小型淀粉粒组/%	大型淀粉粒组/%
中小型淀粉粒	93.65±0.37 a	13.78±1.33 a
大型淀粉粒	6.16±0.32 b	86.22±1.33 b

类型	初始糊化温度/℃	峰值糊化温度/℃	终止糊化温度/℃	焓值ΔH/(kJ·kg^-1)
中小型淀粉粒	60.44±0.55 b	68.57±0.72 a	75.92±0.59 a	7.38±0.30 b
大型淀粉粒	64.14±0.05 a	69.00±0.19 a	73.80±0.11 b	10.20±0.18 a

类型	初始糊化温度/℃	峰值糊化温度/℃	终止糊化温度/℃	焓值ΔH/(kJ·kg^-1)
中小型淀粉粒	60.44±0.55 b	68.57±0.72 a	75.92±0.59 a	7.38±0.30 b
大型淀粉粒	64.14±0.05 a	69.00±0.19 a	73.80±0.11 b	10.20±0.18 a

类型	峰值黏度/cP	低谷黏度/cP	稀懈值/cP
中小型淀粉粒	1 537.00 a	936.00 a	601.33 a
大型淀粉粒	1 345.33 b	894.00 b	451.33 b