稻谷储藏过程中理化特性变化的研究_图文

1、 28 中国粮油学报 2003 年第 6 期 The Effects of Natural Fermentation on Charateristics of the Rice Starch Granule Wang Feng1 Lu Zhanhui 2 Xue Wentong2 Sun Li 3 ( The Institute of Farm Products Processing of CAAS1 ,Peking 100094 ( Food Science & Technology Faculty China Agricultural University2 ,Peking 100

2、083 (Northwest Sci - Tech University of Agriculture and Forestry3 ,Xi an 712100 Abstract Effects of natural fermentation on characteristics of the rice starch granule were studied. With natural fer2 mentation ,the rice starch granules were more homogenized ,and showed no sign of granule breakdown an

3、d excess loss of dis2 soluble matter. The crystal structure of the starch granule remained A type ,but the amorphous area was weakened or de2 stroyed. The gelatinization temperature ( Tp of the rice starch decreased , but the gelatinization enthalpy (H increased. Key words natural fermentation ,star

4、ch granule ,characteristic ,crystal structure ( 上接第 24 页 Study on Physical and Chemical Characters in Rice Storage Zhang Ying Wu Xianshan Wu Jingde Yang Shixiang Tong Jiping Zheng Leya She Dehong Wu Yuejin ( Rice Research Institute Anhui Academy of Agricultural Sciences Key Lab of Rice Genetics and

5、Breeding of MOA ,Hefei 230031 Abstract According to indexes of the paddy storage deterioration set in the National Standards ,the changes of the vis2 cosity ,content of free fatty acid ( FFA ,and germination percentage of rices stored for different years were investigated ;and the laws of change of

6、lipoxygenase - 3 activity ,amylose content ,gel consistency ,acidity ,Asv ,conductivity ,malondiadehyde (MDA level ,and water content of the stored rices were studied. The results demonstrated the significant corelation level a2 mong the gel consistency ,content of free fatty acid ( FFA ,germination

7、 percentage ,lipoxygenase - 3 activity ,amylose con2 tent ,gel consistency ,acidity ,conductivity ,and malondiadehyde ( MDA level of the stored rices. With the storage time pro2 longing , the viscosity ,lipoxygenase - 3 activity ,germination percentage ,germination trend ,and amylose content ,decreased , but the content of free fatty acid ( FFA ,acidity ,malondiadehyde (MDA level and conductivity increased significantly ,and there were no significant change in the gel consistency ( GC and Asv. These data are useful for development of a new index system t