Preparation of Chlorophyll-free Young Barley Leaf Extract Powders Using Supercritical Carbon Dioxide Modified with Cosolvent.

Autor: Hong, Jin-Hee, Haam, Seungjoo, Oh, Heaung-Shig, Lim, Giobin, Ryu, Jong-Hoon
Předmět:
Zdroj: Biotechnology & Bioprocess Engineering; Nov2019, Vol. 24 Issue 6, p997-1006, 10p
Abstrakt: In this study, we attempted to prepare chlorophyll-free young barley leaf extract powders using three different supercritical carbon dioxide (SCCO2) drying processes. The pure SCCO2 drying process for a methanolic extract solution resulted in a ~30% increase in the antioxidant (saponarin and isovitexin) content and a ~75% decrease in the chlorophyll content compared to a solvent evaporation method. The drying process with ethanol-modified SCCO2 increased the antioxidant content considerably and completely removed the chlorophylls. However, this process could not dry an aqueous ethanolic extract solution with a more than 30% water content. The ethanol-modified SCCO2 drying process that employed a periodic flush with pure SCCO2 was found to effectively dry an aqueous ethanolic extract solution with more than 30% water content. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: