超微粉碎促进香菇粉Ca、Fe、Zn的溶出及消化吸收

对超微香菇盖粉,超微香菇柄粉的Ca、Fe、Zn不同形态溶出量,基于体外消化模型的生物可利用率以及基于正辛醇吸收模型的分配系数进行了评价,并和相应的粗粉(均为60目)进行了对比。结果表明:超微粉碎能够显著提升香菇盖粗粉、香菇柄粗粉的Ca、Fe、Zn水溶出率、Ca可溶态含量,香菇柄粗粉的Fe可溶态含量,香菇盖粗粉的Zn可溶态含量(p0.05);Ca、Fe、Zn的有机态、蛋白结合态、多糖结合态均有不同程度的提高。超微香菇盖粉、超微香菇柄粉,经过体外胃、肠消化后,Zn的生物利用率分别为80.38%、86.77%,Ca的生物可利用率分别为56.41%、61.41%,Fe的生物利用率分别为13.46%、22.17%,超微粉碎可以显著提高香菇盖粗粉、香菇柄粗粉Ca,Zn生物可利用率(p0.05);同时显著促进了香菇柄粗粉Ca、Fe、Zn的吸收(p0.05),而对于香菇盖来说,超微粉碎只能显著提高Ca、Zn的吸收(p0.05)。试验结果为香菇产品的开发和微量元素摄入提供了理论支撑。

Ultrafine Grinding Improves the Dissolution Contends, Digestion and Absorption of Ca, Fe and Zn in Lentinula edodes Powders

The dissolution amounts of Ca, Fe and Zn in the cover powder and stalk powder of Lentinula edodes, the bioavailability based on in vitro digestion model and the partition coefficient based on n-octanol absorption model were evaluated, and compared with the corresponding coarse powder (all 60 mesh). The results showed that the water dissolution rates of Ca, Fe and Zn and the soluble Ca contents were increased in the ultrafine powers from Lentinus edodes caps and stems (p<0.05). The soluble Fe contents in the ultrafine stems powers and the soluble Zn contents in the ultrafine cap powders were significantly higher than those in the corresponding crude powders. The dissolution contents of polysaccharide and protein-bound Ca, Fe and Zn were improved to some extents. The order of accessibility of the three elements in gastric and gastrointestinal digestive fluids in vitro was Zn > Ca > Fe. The average accessibility of Zn in the ultrafine caps and stems powers was 80.38% and 86.77%, respectively, and that of Ca was 56.41% and 61.41%, respectively, while that of Fe was 13.46% and 22.17%, respectively. In comparison with crude powders, ultrafine grinding powders resulted in signi?cant higher Ca and Zn accessibility ,and higher partition coefficients were observed for Ca, Fe, Zn from ultrafine stem powders powers and Ca, Zn from ultrafine cap powders powers (p<0.05). The results could be the basis of product development of Lentinula edodes and Ca, Fe, Zn intakes.