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AIE材料合成、表征及其在防伪印刷中的应用 被引量:3
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作者 何亚珂 张思怡 +1 位作者 黎雅珊 何本钊 《大学化学》 CAS 2023年第4期134-142,共9页
荧光防伪印刷技术即是将特殊的荧光印刷油墨融合到标识上,并借助额外的激发光才能找到加密信息,从而起到防伪作用。荧光防伪多在膜或固态下使用,因此需要荧光油墨在这些状态下具有强的发光性质。聚集诱导发光(Aggregation-Induced Emiss... 荧光防伪印刷技术即是将特殊的荧光印刷油墨融合到标识上,并借助额外的激发光才能找到加密信息,从而起到防伪作用。荧光防伪多在膜或固态下使用,因此需要荧光油墨在这些状态下具有强的发光性质。聚集诱导发光(Aggregation-Induced Emission,AIE)分子是一类在单分子状态下发光较弱甚至不发光而在聚集状态下表现出强烈发光的分子。而水杨醛席夫碱分子作为一类合成简单、荧光强度高的典型AIE分子,具备刺激响应荧光机制,其在酸碱环境下表现出不同的荧光特性使得这一类分子在防伪印刷领域有突出的表现。本论文通过水杨醛与胺的亲核加成反应一步制备水杨醛席夫碱AIE分子,并进一步展示其在防伪印刷中的应用;通过对该分子在不同环境下的表征,阐明其AIE特性和刺激响应荧光机制在防伪印刷应用中的作用。本实验原料易得、安全、成本低廉,所需仪器常规,符合实验教学要求,通过本实验训练,学生不仅掌握了席夫碱类化合物的制备方法,同时也学习了水杨醛席夫碱分子的刺激响应荧光在防伪印刷中的应用。结合课堂教学和拓展阅读,使学生进一步了解防伪印刷产品的特性以及设计思路。 展开更多
关键词 聚集诱导发光 防伪印刷 席夫碱 荧光分子 综合化学实验
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Effects of lactic acid bacteria fermentation on the bioactive composition,volatile compounds and antioxidant activity of Huyou(Citrus aurantium'Changshan-huyou')peel and pomace
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作者 yake he Yanyun Zhu +3 位作者 Jimin Lvi Ye Gu Ting Wang Jianchu Chen 《Food Quality and Safety》 SCIE CSCD 2023年第2期317-329,共13页
Using lactic acid bacteria(LAB)to ferment Huyou peel and pomace could provide a reference for making full use of Huyou resources and provide valuable suggestions for the industrial production of functional foods.The e... Using lactic acid bacteria(LAB)to ferment Huyou peel and pomace could provide a reference for making full use of Huyou resources and provide valuable suggestions for the industrial production of functional foods.The effects of LAB fermentation on the bioactive composition,volatile compounds and antioxidant activity of Huyou peel and pomace were studied.Results showed that both Huyou peel and pomace were good substrates for LAB growth.LAB had remarkable influence on bioconversion of organic acids,among which ascorbic acid content was increased significantly.In addition,LAB could produce flavonoids with enhanced bioactivity and absorption.In particular,the contents of rhoifolin,quercitrin and quercetin were increased by over 100%.Besides,the volatile compounds contents and aroma complexity were improved.Furthermore,the antioxidant activity was enhanced.Thus,our study provides high-value applications of Huyou,and fermented products with improved nutritional value and flavor are potentially beneficial to human health. 展开更多
关键词 Lactic acid bacteria Huyou peel Huyou pomace bioactive composition volatile compounds
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