【目的】为了充分利用枇杷种植过程中的主要副产物。【方法】采用超声辅助低共熔溶剂(deep eutectic solvents,DESs)提取枇杷残次果多酚(loquat defective fruit polyphenols,LDFP)和老叶多酚(loquat old leaves polyphenols,LOLP),通过...【目的】为了充分利用枇杷种植过程中的主要副产物。【方法】采用超声辅助低共熔溶剂(deep eutectic solvents,DESs)提取枇杷残次果多酚(loquat defective fruit polyphenols,LDFP)和老叶多酚(loquat old leaves polyphenols,LOLP),通过LC-MS/MS技术分析组成成分,并评价其抗氧化和降血糖活性。【结果】酸基DESs提取量显著高于其他多羟基、糖基和氨基DESs。当提取条件为DESs组合氯化胆碱-柠檬酸和氯化胆碱-乳酸,DESs摩尔比1∶4.2和1∶3.5,液料比17∶1和26∶1 mL/g,提取时间47和74 min时,LDFP和LOLP得率为(13.37±0.20)和(51.91±0.33)mg/g,显著高于70%乙醇提取的得率[(2.62±0.14)和(22.66±0.87)mg/g]。经鉴定,LDFP和LOLP中共含有14种酚酸类和11种黄酮类物质。此外,LDFP和LOLP清除DPPH·的IC_(50)为86.55和33.28μg/mL,清除ABTS+·的IC_(50)为55.18和28.45μg/mL,抑制α-淀粉酶的IC_(50)为859.9和486.4μg/mL,抑制α-葡萄糖苷酶的IC_(50)为414.3和176.6μg/mL。【结论】超声辅助DESs提取枇杷多酚工艺切实可行,并且提取物具有一定的抗氧化和降血糖活性。展开更多
Energy storage is a key factor in the drive for carbon neutrality and carbon nanotubes(CNTs)may have an important role in this.Their intrinsic sp2 covalent structure gives them excellent electrical conductivity,mechan...Energy storage is a key factor in the drive for carbon neutrality and carbon nanotubes(CNTs)may have an important role in this.Their intrinsic sp2 covalent structure gives them excellent electrical conductivity,mechanical strength,and chemical stability,making them suitable for many uses in energy storage,such as lithium-ion batteries(LIBs).Currently,their use in LIBs mainly focuses on conductive networks,current collectors,and dry electrodes.The review outlines advances in the use of CNTs in the cathodes and anodes of LIBs,especially in the electrode fabrication and mechanical sensors,as well as providing insights into their future development.展开更多
文摘Energy storage is a key factor in the drive for carbon neutrality and carbon nanotubes(CNTs)may have an important role in this.Their intrinsic sp2 covalent structure gives them excellent electrical conductivity,mechanical strength,and chemical stability,making them suitable for many uses in energy storage,such as lithium-ion batteries(LIBs).Currently,their use in LIBs mainly focuses on conductive networks,current collectors,and dry electrodes.The review outlines advances in the use of CNTs in the cathodes and anodes of LIBs,especially in the electrode fabrication and mechanical sensors,as well as providing insights into their future development.
