Possibilities of retrieving and making a practical use of phenolic compounds from the waste products: blackcurrant and chokeberry pomace and spent hops
2009
Baranowski, K. | Baca, E. | Salamon, A. | Michalowska, D. | Meller, D. | Karas, M.,Instytut Biotechnologii Przemyslu Rolno-Spozywczego, Warszawa (Poland)
The possibility of retrieving anthocyanins and polyphenols from the waste products of fruit and vegetable, as well as hop industry by ethanol extraction has been examined. These waste products are: blackcurrant and chokeberry pomace and spent hops after the hop extraction in liquid carbon dioxide. The results of spectrophotometric and HPLC analysis has showed the high level of the overall content of anthocyanins and polyphenols as well as the examined polyphenol components (e.g. catechins, quercetins and chlorogenic acid) in the obtained etanol extracts. After six months of storing the concentrated extracts from blackcurrent and chokeberry pomace in 5-6 deg C without the access to the light the overall content of anthocyanins in the extracts has been 22 and 25 lower respectively, and the overal content of polyphenols has been 10 and 15 percent lower respectively
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