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TLC Identification of Yao Medicine Pileostegia tomentellal and Extraction Technology and Content Determination of Umbelliferone

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Medicinal Plant 2024年第2期15卷 15-17,20页

作者： Jiangcun WEI Xiumei MA Meiyan QIU Bing QING Jingrong LU Hong LEI Xiaodong HUANG Wen ZHONG Guangxi international Zhuang Medical Hospital Nanning 530201China Guangxi University of Chinese Medicine Nanning 530200China

[Objectives]To establish a TLC and content determination method of Pileostegia tomentellal,with umbelliferone as the indicator component.[Methods]TLC identification was performed by silica gel G thin layer plate with n-hexane-ethyl acetate(4:3)as the developing agent,and the plate was examined by UV lamp(365 nm).The umbelliferone content was determined by HPLC:Inertsil ODS-3 C 18 column(4.60 mm×250 mm,5μm);mobile phase acetonitrile-0.2%phosphoric acid gradient elution;detection wavelength 320 nm,flow rate 1.0 mL/min,column temperature 30℃,injection volume 10μL.[Results]The chromatogram of *** showed the same color spot in the same position as that of reference medicinal material,and the spot was clear with good *** showed a good linear relationship when the injection volume was 2.63-131.27μg/mL(R^(2)=0.9997).The average recovery of umbelliferone in the low,middle and high adding groups of *** was 99.57%and the RSD was 2.15%.[Conclusions]The method can effectively identify Yao medicine *** and accurately determine the content of umbelliferone in medicinal materials,which will provide a scientific basis for the development and utilization of medicinal resources of Yao medicine ***.

关键词： Pileostegia tomentellal TLC identification Extraction technology Umbelliferone Content determination

高电压快充钴酸锂正极——关键挑战、改性策略与未来展望（英文）

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Engineering 2024年第6期 105-127页

作者：王功瑞毕志宏张安萍 Pratteek Das 林虎吴忠帅 state key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Chinese Academy of Sciences

Lithium-ion batteries（LIBs） with the ‘‘double-high” characteristics of high energy density and high power density are in urgent demand for facilitating the development of advanced portable electronics. However,the lithium ion（Li+）-storage performance of the most commercialized lithium cobalt oxide（LiCoO2, LCO）cathodes is still far from satisfactory in terms of high-voltage and fast-charging capabilities for reaching the double-high target. Herein, we systematically summarize and discuss high-voltage and fast-charging LCO cathodes, covering in depth the key fundamental challenges, latest advancements in modification strategies, and future perspectives in this field. Comprehensive and elaborated discussions are first presented on key fundamental challenges related to structural degradation, interfacial instability, the inhomogeneity reactions, and sluggish interfacial kinetics. We provide an instructive summary of deep insights into promising modification strategies and underlying mechanisms, categorized into element doping（Li-site, cobalt-/oxygen-site, and multi-site doping） for improved Li+diffusivity and bulkstructure stability; surface coating（dielectrics, ionic/electronic conductors, and their combination） for surface stability and conductivity; nanosizing; combinations of these strategies; and other strategies（i.e., optimization of the electrolyte, binder, tortuosity of electrodes, charging protocols, and prelithiation methods）. Finally, forward-looking perspectives and promising directions are sketched out and insightfully elucidated, providing constructive suggestions and instructions for designing and realizing high-voltage and fast-charging LCO cathodes for next-generation double-high LIBs.

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TLC Identification and Extraction Process of Rubiasin-1-methyl Ether from Yao Medicine Chuanlianzhu

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Medicinal Plant 2024年第3期15卷 35-38页

作者： Jingrong LU Jiangcun WEI Xiumei MA Bing QING Meiyan QIU Wen ZHONG Guangxi international Zhuang Medicine Hospital Nanning 530201China

[Objectives]To establish a thin-layer chromatography(TLC)method for the determination of rubiadin-1-methyl ether in Yao Medicine Chuanlianzhu(Damnacanthus giganteus).[Methods]A silica gel G thin-layer plate was adopted for *** ether(60-90℃)-chloroform-methanol-water(7:15:3:1)was used as the developing solvent and inspected under ultraviolet lamp(365 nm).The content was determined by Inertsil ODS-3 C 18 column(4.60 mm×250 mm,5μm),mobile phase:acetonitrile-0.2%phosphoric acid gradient elution,detection wavelength 277 nm,flow rate 1.0 mL/min,column temperature 30℃,injection volume 10μL.[Results]The spots of 10 Chuanlianzhu samples from different origins showed the same color at the same position as the control,and the spots were clear and *** injection volume of rubiadin-1-methyl ether showed a good linear relationship in the range of 2.90-145μg(R=0.9996).The average recovery rate of rubiadin-1-methyl ether in the low,medium and high dose groups of Yao Medicine Chuanlianzhu was 98.72%,and RSD=1.78%.[Conclusions]This method can effectively identify Yao Medicine Chuanlianzhu medicinal materials and accurately determine the content of rubiadin-1-methyl ether in the medicinal *** provides a scientific basis for the development and utilization of Yao Medicine Chuanlianzhu medicinal resources.

关键词： Chuanlianzhu Thin-layer chromatography (TLC) Extraction process Rubiadin-1-methyl ether Content determination

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多功能热电织物用于可穿戴无线传感系统

Engineering 2024年第4期35卷 158-167页

作者： Xinyang He Jiaxin Cai Mingyuan Liu Xuepeng Ni Wendi Liu Hanyu Guo Jianyong Yu Liming Wang Xiaohong Qin key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China state key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Flexible thermoelectric materials play an important role in smart wearables,such as wearable power generation,self-powered sensing,and personal thermal ***,with the rapid development of Internet of Things(IoT)and artificial intelligence(AI),higher standards for comfort,multifunctionality,and sustainable operation of wearable electronics have been proposed,and it remains challenging to meet all the requirements of currently reported thermoelectric ***,we present a multifunctional,wearable,and wireless sensing system based on a thermoelectric knitted fabric with over 600 mm·s^(-1)air permeability and a stretchability of 120%.The device coupled with a wireless transmission system realizes self-powered monitoring of human respiration through an mobile phone application(APP).Furthermore,an integrated thermoelectric system was designed to combine photothermal conversion and passive radiative cooling,enabling the characteristics of being powered by solar-driven in-plane temperature differences and monitoring outdoor sunlight intensity through the ***,we decoupled the complex signals of resistance and thermal voltage during deformation under solar irradiation based on the anisotropy of the knitted fabrics to enable the device to monitor and optimize the outdoor physical activity of the athlete via the *** novel thermoelectric fabricbased wearable and wireless sensing platform has promising applications in next-generation smart textiles.

关键词： Thermoelectric fabrics Wearable device Wireless Multifunctional sensing system Outdoor wearable signal monitoring

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Goji berry-derived phenylpropionyl phenylethylamine derivatives protect against ethanol-induced hepatic damage

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Food Science and Human Wellness 2024年

作者： Zhengqun Zhou Zhaodi Che Jiancong Mai Rui Zhang Zhihui Luo Yifang Li Kwokfai So Jia Xiao Xinsheng Yao Hao Gao GMH Institute of CNS Regeneration Guangdong Medical key Laboratory of Brain Function and Diseases Jinan University Clinical Medicine research Institute and Department of Metabolic and Bariatric Surgery the First Affiliated Hospital of Jinan University Institute of Traditional Chinese Medicine and Natural Products College of Pharmacy/Guangdong Province key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs research/international Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE) of China Jinan University

Goji berry is a famous edible and medicinal substance around the world. In this research， 15 phenylpropionyl phenylethylamine derivatives (1-15)， including one new compound (1)， were separated and identified from goji berry. All isolates were elucidated via extensive NMR spectral analyses and chemical techniques. Six known isolates were first obtained from Lycium genus. Six isolates were effectively split into double chromatographic peaks accompanied by the basically identical areas， indicating they belong to racemates. The ORAC experiment indicated that all isolates displayed a capacity of scavenging free radicals， and most of them exhibited higher ORAC values than EGCG. In ethanol/palmitic acid (PA)-established in vitro hepatocyte injury model， four phenylpropionyl phenylethylamine derivatives (1， 2， 9， and 15) significantly alleviated hepatocyte injury， among which compound 1 exerted the strongest protective activity. Notably， the hepatoprotective effect of compound 1 was further confirmed in ethanol-established liver damage mouse model， reflected by the reduction of lipid accumulation and the attenuation of pathological alteration. Combined with the in vitro results， the in vivo observations suggested that compound 1 suppressed cell apoptosis and the outburst of inflammation. Our findings provided first-hand evidence proving that goji berry-derived phenylpropionyl phenylethylamine derivatives hold a potential in treating alcoholic liver disease.

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Assessing risk of Bombali virus spillover to humans by mutagenesis analysis of viral glycoprotein

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hLife 2024年第1期2卷 32-42页

作者： Lincan Li Tianyu Gan Ziyue Ma Yi Huang Jin Zhong Unit of Viral Hepatitis CAS Key Laboratory of Molecular Virology and ImmunologyShanghai Institute of Immunity and InfectionCenter for Biosafety Mega-ScienceChinese Academy of SciencesShanghaiChina University of Chinese Academy of Sciences BeijingChina ShanghaiTech University ShanghaiChina Wuhan National Biosafety Laboratory Center for Biosafety Mega-ScienceChinese Academy of SciencesHubeiChina

Ebolaviruses,such as the highly pathogenic Ebola virus(EBOV),belong to the family Filoviridae and have caused out-breaks of severe and fatal hemorrhagic fever over the past *** virus(BOMV)is a newly discovered ebolavirus from bats with unknown potential to infect *** most ebolaviruses,the interaction between viral glycoprotein(GP)and host receptor Niemann-Pick C1(NPC1)is crucial for viral entry and determines host ***,we analyzed the BOMV GP-mediated virus entry into human cells using our recently developed EBOV transcription-and replication-competent virus-like particle(trVLP)*** demonstrated that while BOMV GP can be efﬁciently incorporated into trVLPs,it is inefﬁcient in mediating trVLP entry into human ***,BOMV GP-mediated virus entry into human cells can be signiﬁcantly enhanced by a few mutations in the NPC1-binding domain of ***,we showed that these mutations increase the binding of BOMV-GP to human *** summary,our results suggested that although wild-type BOMV does not efﬁciently infect human cells,the emergence of mutations in viral GP may boost its ability to spill over to humans,highlighting the importance of monitoring BOMV GP evolution in preventing potential BOMV spillover events.

关键词： Bombali virus glycoprotein entry Ebola virus Niemann-Pick C1

金属离子和油酰肌氨酸钠对锂云母和长石浮选分离的协同作用机理(英文)

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Transactions of Nonferrous Metals Society of China 2024年

作者：向国源范瑞华朱文韬孙伟郑仁基高志勇中南大学资源加工与生物工程学院中南大学金属资源开发利用碳减排教育部工程研究中心中南大学战略含钙矿物资源清洁高效利用湖南省重点实验室中南大学湖南省关键金属矿产资源高效清洁利用国际联合研究中心

铝硅酸盐矿物锂云母和长石的高效分离一直是个难题。本研究首次将油酰肌氨酸钠与不同金属离子（钙、镁、铜和铅）结合，用来提高这两种矿物的浮选分离效率。通过接触角测量、原子力显微镜、傅立叶变换红外光谱、物种分布计算和密度函数... 详细信息

铝硅酸盐矿物锂云母和长石的高效分离一直是个难题。本研究首次将油酰肌氨酸钠与不同金属离子（钙、镁、铜和铅）结合，用来提高这两种矿物的浮选分离效率。通过接触角测量、原子力显微镜、傅立叶变换红外光谱、物种分布计算和密度函数理论计算研究其协同作用机理。结果表明，钙离子对活化锂云母的选择性最大，其次是镁、铜和铅离子。此外，油酰肌氨酸钠能在钙离子活化的锂云母表面形成多层和强烈的化学吸附，吸附能高达-1248.91 kJ/mol。相比之下，油酰肌氨酸钠在钙离子活化的长石上的吸附作用则不明显，吸附能低至-598.84 kJ/mol。因此，油酰肌氨酸钠和钙离子兼具强捕收能力和高选择性，它们的组合使用为全面和高效地回收锂资源提供新策略。

关键词：浮选锂云母长石油酰肌氨酸钠金属离子

Enriched electrophilic oxygen species facilitate acidic oxygen evolution on Ru-Mo binary oxide catalysts

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Nano research 2024年第3期17卷 1165-1172页

作者： Yaya Wang Yunzhou Wen Yumeng Cheng Xinhong Chen Mengjiao Zhuansun Tongbao Wang Jun Li Debora Meira Huarui Sun Jun Wei Jia Zhou Yuhang Wang Sisi He Shenzhen key Laboratory of Flexible Printed Electronics Technology Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China School of Science Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou 215123China Frontiers Science Center for Transformative Molecules Shanghai Jiao Tong UniversityShanghai 200240China Science Division Canadian Light SourceSaskatoonSKS7N 2V3Canada Photon Science Division Argonne National LaboratoryLemontIL60439USA School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)University TownShenzhen 518055China

The polymer electrolyte membrane(PEM)electrolyzers are burdened with costly iridium(Ir)-based catalysts and high operation overpotentials for the oxygen evolution reaction(OER).The development of earth-abundant,highly active,and durable electrocatalysts to replace Ir is a critical step in reducing the cost of green hydrogen *** we develop a Ru5Mo4Ox binary oxide catalyst that exhibits high activity and stability in acidic *** electron-withdrawing property of Mo enriches the electrophilic surface oxygen species,which promotes acidic OER to proceed via the adsorbate evolution *** a result,we achieve a 189 mV overpotential at 10 mA·cm^(-2) and a Tafel slope of 48.8 mV·dec^(-1).Our catalyst demonstrates a substantial 18-fold increase in intrinsic activity,as evaluated by turnover frequency,compared to commercially available RuO_(2) and IrO_(2) ***,we report a stable OER operation at 10 mA·cm^(-2) for 100 h with a low degradation rate of 2.05 mV·h^(-1).

关键词： electrocatalysis oxygen evolution reaction(OER) ruthenium(Ru)-based oxide molybdenum electrophilic oxygen

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无人飞行器在不确定扰动下的动态目标跟踪

Engineering 2024年第4期35卷 74-85页

作者： Yanjie Chen Yangning Wu Limin Lan Hang Zhong Zhiqiang Miao Hui Zhang Yaonan Wang School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350108China Department of Computer Science Aberystwyth UniversityAberystwyth SY233DBUK School of Robotics Hunan UniversityChangsha 410082China College of Electrical and Information Engineering Hunan UniversityChangsha 410082China National Engineering research Center of Robot Visual Perception and Control Technology Hunan UniversityChangsha 410082China

This study proposes an image-based visual servoing(IBVS)method based on a velocity observer for an unmanned aerial vehicle(UAV)for tracking a dynamic target in Global Positioning System(GPS)-denied *** proposed method derives the simplified and decoupled image dynamics of underactuated UAVs using a constructed virtual camera and then considers the uncertainties caused by the unpredictable rotations and velocities of the dynamic target.A novel image depth model that extends the IBVS method to track a rotating target with arbitrary orientations is *** depth model ensures image feature accuracy and image trajectory smoothness in rotating target *** relative velocities of the UAV and the dynamic target are estimated using the proposed velocity *** to the velocity observer,translational velocity measurements are not required,and the control chatter caused by noise-containing measurements is *** integral-based filter is proposed to compensate for unpredictable environmental disturbances in order to improve the antidisturbance *** stability of the velocity observer and IBVS controller is analyzed using the Lyapunov *** simulations and multistage experiments are conducted to illustrate the tracking stability,anti-disturbance ability,and tracking robustness of the proposed method with a dynamic rotating target.

关键词： Unmanned aerial vehicle Visual servoing Velocity observer Target tracking

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