The purpose of this study was to optimal conditions for the pilot-scale extraction of ginger (Zingiber officinale) and optimum nanoemulsion formation conditions with respect to contents of the functional components (gingerols and shogaols) of ginger. The yields of 70% ethanol extracts and hexane fractions (GHFs) obtained by pilot-scale extraction of ginger (60 kg) were 19.40 and 1.36 kg, respectively, and the total gingerols and shogaols contents of GHF was 874.19 g. An optimal nanoemulsion was obtained when GHF, Tween 20 (T20), water, and propylene glycol (PG), a cosurfactant were added. When ultrasonication was used, the optimal mixing ratio was GHF : T20 : PG : water＝1:1:0.5:1, and the particle size was 167.83 nm, and using an optimal mixing ratio (GHF : T20 : PG : water＝1:2:0.5:1) and a self-assembly method, the particle size obtained was 214.97 nm. When nanoemulsions were prepared using a microfluidizer (mimicking mass production), a particle size of 167.13 nm was achieved at 20,000 psi. Furthermore, a double-layer nanoemulsion prepared using chitosan and alginsan remained stable for 8 weeks. The results of this study are useful to functional food industries seeking to develop ginger-derived products.

This study compares the chemical composition, antioxidant effect, and anti-inflammatory potential of different parts (whole, flesh, and peels) of Codonopsis lanceolata roots (CLR). Component analysis performed using liquid chromatography (LC) revealed that the contents of vitamin B2, B3, tangshenoside I, lobetyolin, lancemaside A, and total polyphenol were highest in the CLR peels. Moreover, the peels also showed the highest antioxidant activity. All components of the CLR inhibited oxidative stress and enhanced mitochondrial biogenesis in LPS-treated RAW 264.7 cells, as quantified using fluorescent probes. Results of the Griess assay and enzyme-linked immunosorb ent assay, revealed that exposure to CLR suppressed the production of nitric oxide, prostaglandin E2, and pro-inflammatory cytokines. CLR treatment also reduced the expression levels of cyclooxygenase-2 and inducible nitric oxide synthase protein through the regulation of nuclear factor-κB and mitogen-activated protein kinase signaling pathways, respectively, as determined by western blot. The findings of this study suggested that the CLR peels have a higher concentration of bioactive compounds than the amounts obtained in the flesh tissues of CLR. Thus, we propose that consuming CLR with the peel is more beneficial to the human body, than eating peeled.

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