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Identification of Elephantopi Herba and Its Substitutes by LM/SEM Observation and TLC Scanning

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Identification of Elephantopi Herba and Its Substitutes by L...

茶多酚缓释微囊的制备Ⅱ提高微囊药物包封效率的研究

第十四届全国中药和天然药物学术研讨会

作者： Hui Cao yaolan li Wencai Ye Yongxue li Paul But Pangchui Shaw China Academy of Chinese Medical Sciences National Engineering Research Center for Modernization of traditional Chinese Medicine Jinan University

Using light microscopy（LM）,scanning electron microscopy（SEM） and thin layer chromatograph scanning（TLCS） methods to identify Chinese drug Didancao（Elephantopus scaber） and its substitutes Baihuadidancao（Elephantopus mollis）,Jiadidancao（Pseudo-elephantopus spicatus）.Based on the microscopic features and TLC profiles,the commercial Didancao samples retailed in China’s mainland,Taiwan,Hong Kong and Macau markets were identified as Elephantopus scaber.

关键词： Elephantopus scaber TLC SEM Identification

来源： cnki会议评论

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生物医学工程学杂志 1999年第S1期16卷 115-116页

作者：李药兰黄才欢岑颖洲暨南大学化学系广州510632

以乙基纤维素 ( EC)为囊材 ,采用乳液溶剂蒸发技术制备茶多酚 ( TP)缓释微囊。本文主要研究提高囊材对 TP的包封效率的方法。实验表明 ,在微囊制备过程中 ,将外相中的蒸馏水改为 TP水溶液 ,可使微囊的药物包封率得到较大的提高 :且所制... 详细信息

以乙基纤维素 ( EC)为囊材 ,采用乳液溶剂蒸发技术制备茶多酚 ( TP)缓释微囊。本文主要研究提高囊材对 TP的包封效率的方法。实验表明 ,在微囊制备过程中 ,将外相中的蒸馏水改为 TP水溶液 ,可使微囊的药物包封率得到较大的提高 :且所制得的 TP微囊对

关键词：茶多酚缓释微囊药物包封率

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive

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组块教学在小学语文课堂中的应用

基础教育研究 2022年第14期 75-77页

作者：李姚兰江苏常州市武进区礼嘉中心小学常州213176

基于多元智能理论的组块教学,旨在发展学生思维,激发学生言语智慧,开发学生的无限潜能。小学语文组块教学能够提高学习效率,优化学习方式,提升言语智慧。组块教学要求教师在合理开发教材的基础上,创新利用教材,将教学内容重新组合,形成... 详细信息

基于多元智能理论的组块教学,旨在发展学生思维,激发学生言语智慧,开发学生的无限潜能。小学语文组块教学能够提高学习效率,优化学习方式,提升言语智慧。组块教学要求教师在合理开发教材的基础上,创新利用教材,将教学内容重新组合,形成课堂需要的知识“组块”。借助组块区分多音字、理解字义、积累语言、推动课内外群文阅读,个性化组块作业助力“双减”落地,让语文学习在课堂真实发生。

关键词：组块教学智慧课堂小学语文

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

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生物素对动物糖、脂代谢的影响及其作用机制

动物营养学报 2022年第6期34卷 3511-3518页

作者：晁碧辉宋万明李瑶兰杨竹青江西农业大学动物科学技术学院南昌330045

生物素通过激活环鸟苷酸(cGMP)/蛋白激酶G(PKG)信号通路,诱导胰岛素分泌,胰岛素通过磷脂酰肌醇-3-激酶(PI3K)/丝/苏氨酸蛋白激酶(AKT)信号通路激活胰岛素受体,导致葡萄糖激酶活性提高,糖、脂代谢相关基因表达上调。生物素也可与组蛋白... 详细信息

生物素通过激活环鸟苷酸(cGMP)/蛋白激酶G(PKG)信号通路,诱导胰岛素分泌,胰岛素通过磷脂酰肌醇-3-激酶(PI3K)/丝/苏氨酸蛋白激酶(AKT)信号通路激活胰岛素受体,导致葡萄糖激酶活性提高,糖、脂代谢相关基因表达上调。生物素也可与组蛋白和热应激蛋白等发生生物素酰化,从而以表观遗传形式参与甲基化和乙酰化等过程,并对基因表达、细胞信号通路及染色质结构等起着独特的调控作用。因此,本文对生物素对动物糖、脂代谢及脂肪沉积的影响及其作用机制进行归纳总结,以期为动物生产实践提供一些有用信息。

关键词：生物素动物糖代谢脂代谢脂肪沉积作用通路基因表达

中药臭灵丹中黄酮类化合物的体外抗肿瘤活性研究

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中国中药杂志 2010年第16期35卷 2171-2174页

作者：曹长姝刘百联沈伟哉王辉李药兰暨南大学医学院解剖学系广东广州510632 暨南大学药学院中药及天然产物研究所广东广州510632 暨南大学医学院微生物及免疫学系广东广州510632

目的:探讨中药臭灵丹中黄酮类化合物的体外抗肿瘤活性。方法:采用MTT法,检测分离自臭灵丹的6个黄酮类化合物对2种正常细胞的毒性和对2种肿瘤细胞的增殖抑制作用,并初步分析它们的构效关系;运用流式细胞仪,检测活性化合物对细胞凋亡率及... 详细信息

目的:探讨中药臭灵丹中黄酮类化合物的体外抗肿瘤活性。方法:采用MTT法,检测分离自臭灵丹的6个黄酮类化合物对2种正常细胞的毒性和对2种肿瘤细胞的增殖抑制作用,并初步分析它们的构效关系;运用流式细胞仪,检测活性化合物对细胞凋亡率及细胞周期的影响。结果:6个黄酮化合物中,5,7,3,′4′-四甲氧基-3-羟基黄酮与金腰素乙显著抑制A549和HeLa 2种肿瘤细胞的增殖并呈浓度依赖性关系,且对正常细胞Vero和EVC304的毒性较小;这2个黄酮结构中均有邻位酚甲氧基。流式结果显示金腰素乙对HeLa细胞的G2/M期起阻滞作用并呈浓度依赖性关系。5,7,3,′4′-四甲氧基-3-羟基黄酮与金腰素乙对A549和HeLa细胞都有促凋亡作用并呈明显的量效关系。结论:5,7,3,′4′-四甲氧基-3-羟基黄酮与金腰素乙对肿瘤细胞的生长有显著的抑制增殖作用且细胞毒性小,并通过调节细胞周期及诱导凋亡发挥抗肿瘤作用。

关键词：黄酮类化合物抗肿瘤细胞凋亡细胞周期

SEI/dead li-turning capacity loss for high-performance anode-free solid-state lithium batteries

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Journal of Energy Chemistry 2024年第9期96卷 145-152页

作者： Qianwen Yin Tianyu li Hongzhang Zhang Guiming Zhong Xiaofei Yang Xianfeng li Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Long-Duration and Large-Scale Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Laboratory of Advanced Spectro-Electrochemistry and lithium-Ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Anode-free solid-state lithium metal batteries(AF-SSLBs)have the potential to deliver higher energy density and improved safety beyond lithium-metal ***,the unclear mechanism for the fast capacity decay in AF-SSLBs,either determined by dead li or solid electrolyte interface(SEI),limits the proposal of effective strategies to prolong cycling *** clarify the underlying mechanism,herein,the evolution of SEI and dead li is quantitatively analyzed by a solid-state nuclear magnetic resonance(ss-NMR)technology in a typical liPF6-based polymer *** results show that the initial capacity loss is attributed to the formation of SEI,while the dead li dominates the following capacity loss and the growth rate is 0.141 mA h cm^(−2)cycle−*** reduce the active li loss,the combination of inorganic-rich SEI and self-healing electrostatic shield effect is proposed to improve the reversibility of li deposition/dissolution behavior,which reduces the capacity loss rate for the initial SEI and following dead li generation by 2.3 and 20.1 folds,*** a result,the initial Coulombic efficiency(ICE)and stable CE increase by 15.1%and 15.3%in li-Cu cells,which guides the rational design of high-performance AF-SSLBs.

关键词： Solid-state lithium batteries Solid-state NMR Anode-free SEI Dead li

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连翘苷荧光传感器的构建和应用

分析试验室 2020年第4期39卷 438-442页

作者：刘雅秀王文科田琴李摇篮山西师范大学生命科学学院临汾041000

以柠檬酸为碳源,三聚氰胺和甲醛为双掺杂剂合成碳量子点,并对合成的量子点进行透射电镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线粉末衍射(XRD)、紫外吸收光谱(UV)和荧光光谱(RF)表征,结果表明该量子点粒径均一,发光稳定,适合用作荧光探... 详细信息

以柠檬酸为碳源,三聚氰胺和甲醛为双掺杂剂合成碳量子点,并对合成的量子点进行透射电镜(TEM)、傅里叶变换红外光谱(FTIR)、X射线粉末衍射(XRD)、紫外吸收光谱(UV)和荧光光谱(RF)表征,结果表明该量子点粒径均一,发光稳定,适合用作荧光探针。优化了碳量子点含量、pH、反应时间以及温度等影响因素,结果显示检测波长λmax=425 nm时,连翘苷在0.008~0.030 mg/mL范围内有良好的线性关系,1/△f=0.00005(1/c)+0.0003(R2=0.9948),加标回收率在92.5%~106.3%之间,RSD<5%,且干扰物质、反应时间、温度等因素在一定范围内对实验结果的测定无影响。该方法可用于药剂中连翘苷含量的测定。

关键词：碳量子点连翘苷荧光猝灭双黄连