Effect of superfine-grinding on the physicochemical and antioxidant properties of Dendrobium nobile powders

In herbal markets, an overwhelming majority the Dendrobium nobile are sold in dried strips form, and this product type would lead to incomplete release of active ingredient. To increase bioaccessibility nobile, we obtained powders different particle sizes by shear-breaking superfine-grinding further compare its sensory properties, physical leaching rate ingredients antioxidant activity vitro. The results showed that changed properties with bulk density, a decrease swelling capacity water-holding water solubility index. method also contributed total polysaccharides, dendrobine, polyphenols flavonoids components, thereby increasing ABTS, DPPH nitrite ion scavenging activity. addition, scanning electron microscopy infrared spectroscopy analyses had no effect on primary structure fractions as decreasing size. This study suggested could be promising for producing higher contents bioactive compounds bioactivity.