Superfine grinding improves the bioaccessibility and antioxidant properties of Dendrobium officinale powders

Abstract

In herbal markets, an overwhelming majority the D. officinale are sold in spiral or spring form, and this kind of product would lead to the incomplete release of some nutrients. To increase the bioaccessibility of D. officinale, we report a method of pulverisation treatments including general and superfine grinding to reduce the particle size. In comparison with coarse D. officinale, the superfine ground D. officinale with particle sizes of <18 lm resulted in significant higher bulk density, better flowability and greater hydration properties. The protein and polysaccharide solubility of D. officinale increased significantly as its particle size decreased. The extract of D. officinale with a particle size of <18 lm showed that highest total phenolic and total flavonoid contents accompanied with the best antioxidant activity through all antioxidant assays compared with coarse ground D. officinale and D. officinale products.Superfine grinding of Dendrobium officinale Q. Meng et al.1441 † Span was determined by the equation: span = (d (90) À d (10) )/d (50) . ‡ Values are means AE standard deviation of three replications. § Means values in the same column with different letters are significantly different (P < 0.05).

Effects of superfine grinding on the properties and qualities of Cordyceps militaris and its spent substrate

“…The IC 50 values of aqueous extracts from CM and its SS powders decreased with the increase in grinding time, from 1.54 and 2.42 ml/ml to 0.32 and 0.34 ml/ml for 10 hr, respectively. It indicated that the antioxidant activity of CM and SS aqueous extracts increased significantly with the decrease in particle size, which was consistent with the findings of Meng et al (). It was reported that the antioxidant activity of D. officinale powder with the size of <18 μm was higher than that of 37–75, 75–150, and 150–350 μm.…”

Effect of superfine grinding on physicochemical and antioxidant properties of soybean residue powder

“…Compared with the span of M60, the span values first decreased (from 2.60 to 2.48) and then increased (from 2.48 to 2.73) as the size of the soybean residue powder decreased. This behavior was inconsistent with the conclusion that there was a smaller value of span in the superfine powder (Huang, Dou, Li, & Wang, ; Zhang, Xu, & Li, ), but it disagreed with results for Dendrobium officinale (Meng et al, ). The differences may have been due to differences in the milling and sieving processes.…”

Structural characterisation and immunomodulatory effects of polysaccharides isolated from Dendrobium aphyllum

“…In China, there are more than seventy-eight species and two varieties, some of which show bioactivities such as immunomodulatory properties, antitumour activity and antioxidative activity (Xing et al, 2013;Meng et al, 2017). In China, there are more than seventy-eight species and two varieties, some of which show bioactivities such as immunomodulatory properties, antitumour activity and antioxidative activity (Xing et al, 2013;Meng et al, 2017).…”