粒度对银杏叶粉的物理特性及抗氧化性的影响

Effect of Particle Size on Physical Properties and Inoxidability of Folium Ginkgo Powder

以银杏叶为原料,比较了银杏叶粉0~40,40~80,80~120,>120目不同粒度下的密度、堆积密度、冲调性、流动性、水合能力、吸油能力等物理特性,并研究这4种粒度的银杏叶粉羟基自由基、DPPH自由基的清除能力.实验结果表明:在银杏叶粉的物理特性方面,随着银杏叶粉粒径的减小,密度和堆积密度变小,水合能力和吸油能力变化不大,冲调性和流动性变大;在抗氧化性方面,随着银杏叶粉粒径的减小,黄酮含量增高,羟基自由基、DPPH自由基的清除能力增强.

Folium Ginkgo Powder were used as raw materials to compare the volume weight,bulk density,solubility,fluidity,hydratability,oil absorption at 0-40、40-80、80-120、120 screen mesh,their hydroxyl and DPPH radicals were also detected.The experimental results show that in terms of the physical properties,with the decrease of the particle size of Folium Ginkgo Powder,the volume weight and bulk density become smaller,the hydration ability and oil absorption capacity change little,and the brewing property and fluidity become larger;In terms of inoxidability,with the decrease of the particle size of Folium Ginkgo Powder,both the flavonoids content and the scavenging ability of hydroxyl radicals and DPPH radicals are increased.