Adsorption of Olive Leaf (Olea europaea L.) Antioxidants on Silk Fibroin

详细信息    查看全文

• 作者：Deniz Bayç ; in ; Evren Altiok ; Semra &Uuml ; lk&uuml ; Oguz Bayraktar
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2007
• 出版时间：February 21, 2007
• 年：2007
• 卷：55
• 期：4
• 页码：1227 - 1236
• 全文大小：248K
• 年卷期：v.55,no.4(February 21, 2007)
• ISSN：1520-5118

文摘

The adsorption isotherms of oleuropein and rutin were evaluated at different temperatures, pH values,and solid/liquid ratios. The experimental data of adsorption isotherms were well fitted to a Langmuirmodel. The maximum adsorption capacities were determined as 108 mg of oleuropein/g of silk fibroinand 21 mg of rutin/g of silk fibroin. After adsorption of oleuropein and rutin, the antioxidant capacityof silk fibroin increased from 1.93 to 3.61 mmol of TEAC/g. Silk fibroin also gained antimicrobialactivity against Staphylococcus aureus and Klebsiella pneumoniae after adsorption of olive leafantioxidants. In a desorption process, 81% of rutin and 85% of oleuropein were removed from theadsorbent surface in 70% aqueous ethanol solution. Consequently, silk fibroin was found to be apromising biomaterial for the production of functional food or dietary supplements and for thepurification of oleuropein and rutin from olive leaf extracts.