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Valorization of Asparagus leafy by-product by ionic-liquid extraction and characterization of bioactive compounds in the extracts

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Food Bioscience 2022年第2期46卷 857-864页

作者： Bimal Chitrakar Min Zhang sakamon devahastin Benu Adhikari Xiaohu Zhang State Key Laboratory of Food Science and Technology Jiangnan University214122WuxiJiangsuChina College of Food Science and Technology Hebei Agricultural UniversityBaoding071001HebeiChina Jiangsu Province International Joint Laboratory on Fresh Food Smart Processing and Quality Monitoring Jiangnan University214122WuxiJiangsuChina Advanced Food Processing Research Laboratory Department of Food EngineeringFaculty of EngineeringKing Mongkut’s University of Technology Thonburi126 Pracha u-tid RoadBangkok10140Thailand School of Science RMIT UniversityMelbourneVIC3083Australia Nantong Shuangyang Ecological Agriculture Technology Co. Ltd.NantongJiangsuChina

Asparagus(Asparagus officinalis)is a high-value low-calorie vegetable with array of bioactive *** processing nevertheless generates substantial quantity of by-products;their valorization is of utmost importance for the sustainability of the ***,feasibility of using four imidazolium-based ionic liquids and their combinations as well as water and methanol to extract bioactive compounds from asparagus leafy by-product was *** of ultrasound-microwave-assisted heating to augment extraction was also assessed.1-ethyl-3-methylimidazolium-bromide(EMIMBr)resulted in the highest extraction yield of rutin(25.7 mg/g),which is the most abundant compound in the by-product;such a yield was comparable to that achievable via methanol ***-microwave-assisted extraction did not show significant improvement in rutin yield when EMIMBr was ***,although methanolic extract exhibited slightly higher content of rutin,it also contained the higher number of impurities;EMIMBr extract contained less impurities with higher relative content of rutin(70.9%)than that in methanolic extract(67.7%).This could be a milestone in extraction work for an efficient purification.

关键词： 1-Ethy-3-methylimidazolium bromide Ionic-liquid Methanol-extraction Rutin Ultrasound-microwave extraction

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