检索结果-南通市图书馆

Mechanical reliable,NIR light-induced rapid self-healing hydrogel electrolyte towards flexible zinc-ion hybrid supercapacitors with low-temperature adaptability and long service life

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第5期92卷 63-73页

作者： Tengjia Gao Na Li Yang Yang Jing Li Peng Ji yunlong Zhou Jianxiong Xu School of Materials and Advanced Manufacturing Hunan Key Laboratory of Electrochemical Green Metallurgy TechnologyHunan University of TechnologyZhuzhou 412007HunanChina School of Life Sciences and Chemistry Hunan Key Laboratory of Biomedical Nanomaterials and DevicesHunan University of TechnologyZhuzhou 412007HunanChina

Hydrogel electrolytes hold great potential in flexible zinc ion supercapacitors(ZICs)due to their high conductivity,good safety,and flexibility.However,freezing of electrolytes at low temperature(subzero)leads to drastic reduction in ionic conductivity and mechanical properties that deteriorates the performance of flexible ZICs.Besides,the mechanical fracture during arbitrary deformations significantly prunes out the lifespan of the flexible device.Herein,a Zn^(2+)and Li^(+)co-doped,polypyrrole-dopamine decorated Sb_(2)S_(3)incorporated,and polyvinyl alcohol/poly(N-(2-hydroxyethyl)acrylamide)double-network hydrogel electrolyte is constructed with favorable mechanical reliability,anti-freezing,and self-healing ability.In addition,it delivers ultra-high ionic conductivity of 8.6 and 3.7 S m^(-1)at 20 and−30°C,respectively,and displays excellent mechanical properties to withstand tensile stress of 1.85 MPa with tensile elongation of 760%,together with fracture energy of 5.14 MJ m^(-3).Notably,the fractured hydrogel electrolyte can recover itself after only 90 s of infrared illumination,while regaining 83%of its tensile strain and almost 100%of its ionic conductivity during−30–60°C.Moreover,ZICs coupled with this hydrogel electrolyte not only show a wide voltage window(up to 2 V),but also provide high energy density of 230 Wh kg^(-1)at power density of 500 W kg^(-1)with a capacity retention of 86.7%after 20,000 cycles under 20°C.Furthermore,the ZICs are able to retain excellent capacity even under various mechanical deformation at−30°C.This contribution will open up new insights into design of advanced wearable flexible electronics with environmental adaptability and long-life span.

关键词： Flexible zinc ion supercapacitor Hydrogel electrolyte Self-healing Anti-freezing

细胞功能分子的表面增强拉曼成像及其应用研究进展

在线全文

学校读者我要写书评

暂无评论

中国科学：化学 2022年第9期52卷 1601-1608页

作者：杨媛娇陈云龙鞠熀先南京大学生命分析化学国家重点实验室化学化工学院南京210023

表面增强拉曼光谱(surface-enhanced Raman spectroscopy,SERS)具有高灵敏、高通量的特性.基于SERS的拉曼成像技术是一种无损的生物成像技术,已被广泛应用于细胞表面与细胞内生物分子的检测和成像,如对聚糖、microRNA、蛋白质等分子的... 详细信息

表面增强拉曼光谱(surface-enhanced Raman spectroscopy,SERS)具有高灵敏、高通量的特性.基于SERS的拉曼成像技术是一种无损的生物成像技术,已被广泛应用于细胞表面与细胞内生物分子的检测和成像,如对聚糖、microRNA、蛋白质等分子的定量、结构分析与功能追踪等.这一技术也已用于细菌的快速检测、细胞或细菌间的信号通讯研究、细胞pH检测,并可通过活体肿瘤组织的边缘描绘指导手术切除.SERS成像可以规避生命体系中强的分子自荧光以及荧光成像中的光漂白现象,并可以利用不同拉曼信标的指纹光谱实现高灵敏、高通量的生物成像.通过与其他成像技术(如核磁共振成像、光声成像)的结合,SERS成像有望用于更复杂生命体系中生物分子的研究.本文综述了近年来细胞功能分子的表面增强拉曼成像及其应用方面的研究进展.

关键词：表面增强拉曼光谱成像功能生物分子细胞分析

Turn a Relationship of “Neither Enemy nor Friend” into One of Cooperation on a Relatively Equal Footing

在线全文

学校读者我要写书评

暂无评论

China International Studies 2009年第1期29卷 12-14页

作者： chen yunlong Vice-President of Chinese People＇s Institute of Foreign Affairs

President-elect Barack Obama once said that to the United States,China is neither an enemy nor a friend,it is a competitor. I think after Obama takes office as the president,the new American administration will deepen... 详细信息

关键词：中国美国外交关系协作关系

Applying heteroatom co-doped carbon nanotube for manifesting high performance in the electrochemical reduction of aqueous nitrogen oxide by gold nanoparticles

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第3期17卷 1151-1164页

作者： Jane Chung Haibo Yin Rong Wang yunlong Wang Junyang Zhang Yue Peng Joung Woo Han Seongyun Ryu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China EHS Research Center Samsung Electronics Co.Ltd.Gyeonggi-do 18448Republic of Korea

Electrochemical NO-to-NH_(3) under ambient conditions could be a viable alternative having advantages in terms of energy consumption and exhaust gas recycling of NO,replacing a traditional ammonia synthesis method of the Haber–Bosch process.In synthesizing boron(B-)and nitrogen(N-)co-doped carbon nanotube(CNT)based gold(Au)catalysts,B-dopants elevate the conductivity of carbon nanotube by sp2 hybridization on graphene and implant B–N domains within the graphene layer,and result in facilitating the embedding amount of Au accompanied by high dispersibility with low particle size.Theoretical density functional theory(DFT)calculations elucidate that the electron cloud transmitted from B-dopant to the active site of Au induces the Lewis acidic site,and the O-distal pathway occurs following a spontaneous reaction.Increment of the electron-deficient B-doping area accompanied by N-defects and B–O edges retains the major valence state of Au as Au^(δ+),and suppresses hydrogen evolution reaction(HER)by repulsing the hindrance of H*.This record exhibits the highest faradaic efficiency(FE)of 94.7%,and NH_(3) yield rate of 1877.4μg·h^(-1)·mg_(cat)^(-1),which is the optimal yield over energy consumption in the field of the ambient reduction of aqueous NO.

关键词： boron heteroatom nitrogen defect gold nanoparticles valence states of gold electrochemical NO-to-NH3

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

教育数字化转型的构想与策略

中国电化教育 2022年第12期 101-106页

作者：陈云龙翟晓磊课程教材研究所北京100029

无处不在的数字技术影响广泛而深远,世界各国都积极采取政策措施,以应对数字技术对学习、生产、生活带来的变化,尤其是对教育发展带来的新机遇。面对当今世界数字技术的迅速发展,教育如何适应数字时代的需要,促进经济社会的发展。该文... 详细信息

无处不在的数字技术影响广泛而深远,世界各国都积极采取政策措施,以应对数字技术对学习、生产、生活带来的变化,尤其是对教育发展带来的新机遇。面对当今世界数字技术的迅速发展,教育如何适应数字时代的需要,促进经济社会的发展。该文在对教育数字化转型的内涵进行界定的基础上,分析国际上已有探索,提出我国教育数字化转型的建议,认为要围绕教育全要素系统推进教育数字化转型,绘制教育数字化转型远景蓝图;要发挥数据价值,构建以数据为关键要素的教育数字化格局;要应用数字化工具,进行精准教、学、管,实现治理方式变革。

关键词：教育数字化转型构想策略

±800 kV换流变压器阀侧套管表带触指型电连接结构地震响应分析

在线全文

学校读者我要写书评

暂无评论

高电压技术 2023年第12期49卷 4948-4959页

作者：谢强陈云龙毛宝俊李晓璇同济大学土木工程学院上海200092 同济大学工程结构服役性能演化与控制教育部重点实验室上海200092

近年来,国内外发生多起由于套管电连接结构失效导致的过热和放电故障,为探究表带触指型电连接结构在地震作用下的响应,建立了带有该型电连接结构的±800kV换流变压器有限元模型,并进行地震作用下的动态接触响应分析。根据接触电阻数值... 详细信息

近年来,国内外发生多起由于套管电连接结构失效导致的过热和放电故障,为探究表带触指型电连接结构在地震作用下的响应,建立了带有该型电连接结构的±800kV换流变压器有限元模型,并进行地震作用下的动态接触响应分析。根据接触电阻数值计算模型提出触指页片3级失效指标,分析高失效风险触指页片的分布规律及原因,揭示地震作用下该型电连接结构的失效机理。结果表明:在正常工况下,阀侧套管因倾斜悬臂的安装方式,自重会导致其尾部的电连接结构无法完全对中,表带触指不均匀受压,并在连接公头端部出现新的接触区域;在地震作用下,表带触指在3个主要位置的触指页片失效风险最高,电连接结构的电阻相较于正常工作状态明显增大,并保持在较高水平;动力时程分析结果表示:表带触指型电连接结构有不容忽视的地震失效风险,连接公头与连接母头间的相对运动所造成的触指页片接触力变化是导致其失效的主要原因。相关结论可为换流变阀侧套管电连接设计、选型和过热型故障分析提供依据。

关键词：表带触指地震响应电连接结构失效机理阀侧套管特高压

Morphological changes and variations in Na+/K+-ATPase activity in the gills of juvenile large yellow croaker (Larimichthys crocea) at low salinity

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2022年第3期7卷 313-320页

作者：滕广亮黄伟卿吉成龙陈云龙单秀娟 College of Fisheries and Life Science Shanghai Ocean UniversityShanghai201306China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery ScienceQingdao266071China College of Life Science Ningde Normal UniversityNingde352100China Ningde Dingcheng Fishery Company Limited Ningde352000China Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai264003China

Gill morphological changes and physiological responses in juvenile large yellow croaker(Larimichthys crocea)were examined upon exposure to low salinity after indoor culture of the fish at salinities of 2,4,6,8,and 24‰(control group).The thickness of the lamellae was significantly higher in the low-salinity groups than in the control group;in contrast,the interlamellar space was significantly lower in the low-salinity groups than in the control group.Additionally,a significant negative correlation was found between the thickness of lamellae and interlamellar spaces(P<0.01).Mitochondria-rich cells(MRCs)were mainly found in the filament at 24‰salinity and proliferated in the lamellae at lower salinities,suggesting that filament and lamellar MRCs are responsible for ion secretion and absorption,respectively.Meanwhile,the activity of Na+/K+-ATPase(NKA)was significantly elevated with the decrease in salinity from 24‰to 4‰(P<0.05),which was consistent with MRCs proliferation.Finally,the activity of NKA declined at 2‰salinity(P<0.05),indicating the limit of osmoregulation,which was consistent with the degeneration and necrosis of the lamellae.Additionally,different levels of gill histopathological lesions,including pavement cell(PVC)exfoliation,lamellar epithelial lifting,edema,fusion,aneurism,and necrosis,were observed from salinities of 24 to 4‰,likely reducing the respiratory efficiency and compromising the health of juvenile fish.In conclusion,large yellow croaker juveniles could improve the osmoregulatory capacity by increasing lamellar MRCs and NKA activity with the decrease in salinity from 24 to 4‰.However,the associated histopathological lesions are likely to negatively influence the fish by affecting respiration and osmoregulation,especially when the salinity is below 4‰.

关键词： Larimichthys crocea Osmoregulation Gill morphology Histopathological lesions Low salinity

强化重大主题教育,有效落实国家事权--《义务教育历史课程标准(2022年版)》解读

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

历史教学（上半月） 2022年第5期 14-18,54页

作者：吴艳玲陈云龙教育部课程教材研究所北京100029

历史课程承载着落实重大主题教育的重任。新修订的《义务教育历史课程标准(2022年版)》强化重大主题教育,全面、系统融入重大主题教育要求,同时又结合学科特点有所侧重,有效落实了国家事权。在历史教学中,教师应深刻认识重大主题教育与... 详细信息

历史课程承载着落实重大主题教育的重任。新修订的《义务教育历史课程标准(2022年版)》强化重大主题教育,全面、系统融入重大主题教育要求,同时又结合学科特点有所侧重,有效落实了国家事权。在历史教学中,教师应深刻认识重大主题教育与历史课程间的内在联系,准确把握重大主题教育的核心要义,丰富教学形式,充分发挥历史课程在落实重大主题教育方面的独特育人价值。

关键词：历史新课标重大主题国家事权

Bazi Bushen alleviates reproductive aging in aged male mice

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2024年第5期22卷 416-425页

作者： MA Kun LI Mengnan SONG Yahui MAO Xinjing ZHANG Shaolan ZHANG Yaping JIANG Yuning JI Chuanyuan NIU Kunxu LI Hongrong HOU yunlong WEI Cong Graduate School Hebei University of Chinese MedicineShijiazhuang 050091China State Key Laboratory for Innovation and Transformation of Luobing Theory Shijiazhuang 050035China Key Laboratory of State Administration of TCM(Cardio-Cerebral Vessel Collateral Disease) Shijiazhuang 050035China College of Traditional Chinese Medicine·College of Integrated Traditional Chinese and Western Medicine Nanjing University of Chinese MedicineNanjing 210023China Hebei Provincial Key Laboratory of Luobing Shijiazhuang 050035China Key Disciplines of State Administration of TCM for Luobing Shijiazhuang 050035China

Bazi Bushen(BZBS),a traditional Chinese medicine(TCM),has demonstrated therapeutic efficacy in testicular dysfunction within D-galactose and NaNO_(2)mouse models.This study aimed to ascertain if BZBS could also mitigate the decline in testicular function associated with natural aging.Therefore,male aged mice were employed to evaluate the preventive effects of BZBS on male reproductive aging.This was achieved by assessing sex hormone production,testicular histomorphology,and spermatogenesis.Relative to the untreated aged control group,BZBS administration elevated the levels of sex hormones and spermatocyte populations and preserved normal testicular structure in aged mice.Notably,spermatogenesis was maintained.Further analyses,including malondialdehyde(MDA)assays and real-time PCR,indicated that BZBS diminished testicular oxidative stress and the inflammatory burden.Corroborating these findings,mice treated with BZBS exhibited reductions in the populations of senescent and apoptotic cells within the seminiferous tubules,suggesting alleviated cellular damage.In contrast,we observed that rapamycin,a drug known for its longevity benefits,induced excessive testicular apoptosis and did not decrease lipid peroxidation.Collectively,our results highlight BZBS’s promising clinical potential in counteracting male reproductive aging,underlining its mechanisms of action.

关键词： Traditional Chinese medicine Male reproductive aging Spermatogenic cells Cell senescence Apoptosis