检索结果-南通市图书馆

Insect Science 2014年第1期21卷 39-46页

作者： lin-chuan zhao yi-sheng hou yang-hu sima College of Biological and Basic Medicine Sciences Soochow University Suzhou Jiangsu Province China

To explore whether glutathione regulates diapause determination and termina tion in the bivoltine silkworm Bombyx mori, we monitored the changes in glutathione redox cycle in the ovary of both diapanse and nondiapauseegg producers, as well as those in dia pause eggs incubated at different temperatures. The activity ofthioredoxin reductase （TrxR） was detected in ovaries but not in eggs, while neither ovaries nor eggs showed activity of glutathione peroxidase. A lower reduced glutathione/oxidized glutathione （GSH/GSSG） ratio was observed in the ovary of diapauseegg producers, due to weaker reduction of oxidized glutathione （GSSG） to the reduced glutathione （GSH） catalyzed by glutathione reductase （GR） and TrxR. This indicates an oxidative shift in the glutathione redox cy cle during diapause determination. Compared with the 25℃treated diapause eggs, the 5℃treated diapause eggs showed lower GSH/GSSG ratio, a result of stronger oxidation of GSH catalyzed by thioredoxin peroxidase and weaker reduction of GSSG catalyzed by GR. Our study demonstrated the important regulatory role of glutathione in diapause determination and termination of the bivoltine silkworm.

关键词： Bombyx mori determination diapause glutathione redox cycle termination

Dual-Confined Bead-Like CoSe_(2)@NC@NCNFs Bifunctional Catalyst Boosting Rechargeable Zinc-Air Batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第4期42卷 397-405页

作者： Kuixing Ding Jiugang hu Liming zhao huanan Yu Shan Cai yi yang Jun Tan Hongshuai hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangshaHunan410083 China College of Materials and Chemistry China Jiliang UniversityHangzhouZhejiang310018 China College of Standardization China Jiliang UniversityHangzhouZhejiang310018 China

Rationally developing efficient and durable bifunctional catalysts toward oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)is critical for rechargeable zinc-air batteries(ZABs).Herein,a bead-like CoSe_(2)@NC@NCNFs bifunctional catalyst was designed and fabricated by confining cubic CoSe_(2)nanoparticles to three-dimensional(3D)porous MOFs-derived nitrogen-doped carbon(NC)and one-dimensional(1D)N-doped carbon nanofibers(NCNFs)through a facile encapsulate *** 1D/3D continuous network structure contributes to the improvement of specific surface area and electronic conductivity,while the strong synergistic effect between CoSe_(2)sites and Co-Nx-C sites can effectively enhance electron/mass transfer and reduce the diffusion *** as-constructed CoSe_(2)@NC@NCNFs catalyst exhibits high catalytic activity and stability toward ORR/OER with a high half-wave potential of 0.80 V(***)in ORR and a low overpotential of 280 mV at 10 mA·cm^(−2)in *** encouragingly,the rechargeable ZABs with CoSe_(2)@NC@NCNFs cathode deliver high peak power densities(126.8 mW·cm^(−2)),large specific capacities(763.1 mA·h·g^(−1)),and robust charge-discharge cycling stability over 240 *** study provides a facile strategy for designing efficient bifunctional catalysts for rechargeable energy conversion applications.

关键词： Dual-confined Electrospinning Cobalt selenide Bifunctional catalysts Rechargeable zinc-air batteries

Plasmon-enhanced ultra-high photoresponse of single-wall carbon nanotube/copper/silicon near-infrared photodetectors

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第7期17卷 5930-5936页

作者： yi-Ming zhao Xian-Gang hu Chao Chen Zuo-hua Wang An-Ping Wu Hong-Wang Zhang Peng-Xiang hou Chang Liu hui-Ming Cheng Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling College of Mechanical EngineeringYanshan UniversityQinhuangdao 066004China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Single wall carbon nanotube(SWCNT)/Si heterojunction photodetectors have the advantages of high photoresponse ability and simple structure,however,their detection wavelength range are usually lower than 1100 nm,which limits their application in the infrared *** report a SWCNT/Cu/Si photodetector with both a high photoresponse and a detection range up to the infrared band by depositing a Cu nanoparticles(NPs)layer between a SWCNT film and a n-Si *** was found that the Cu NPs produce strong surface plasmon resonance(SPR)under laser irradiation,which breaks through the limitation of Si band gap and greatly improves the photoresponse of the SWCNT/Cu/Si photodetector in the near infrared *** responsivity(R)of the photodetector in the wavelength range of 1850–1200 nm reached 2.2–14.15 mA/W,which is the highest value in the reported plasmon enhanced n-Si based photodetectors,and about 20,000 times higher than that of a SWCNT/Si *** R value for 1550 nm wavelength used in optical communications reached~8.2 mA/W,which is 64%higher than the previously reported values of commonly used *** attribute the significant increase to the strong SPR and low Schottky barrier of Cu with n-Si,which facilitates the generation and transfer of the carriers.

关键词： single wall carbon nanotube photodetector silicon surface plasmon resonance copper

Status of aquatic organisms resources and their environments in yangtze River system(2017-2021)⋆

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile yang Li Shen Yongfeng He huiwu Tian Lei Gao Jinming Wu Zhigang Mei Nian Wei lin Wang Tingbing Zhu Feifei hu Jinling Gong Hongchun Du Xinbin Duan huatang Deng Daoqun Wang Fengyue Zhu Yunfeng Li Fan Wu huijun Ru Yan Zhang Junyi Li Junlin yang Yuntao Zhou Dongdong Fang yinping Wang Danqing lin Yanping yang Peijie Li Silei Liu Jian yang Ping Zhuang Sikai Wang Tao Zhang Gang yang Wenbo yang Lilai Yuan Kun Cao Shuo Xu huiyuan Liu Zhiqiang Liang Chongrui Wang Hong Li Xiping Yuan Xin yang yilong Fu Yanping Zhang Haixin Zhang Zhiying Tao sheng Wang Xiaoping Gao Binsong Jin Kemao Li Guojie Wang shenglong Jian yingqin Li Chenjiang Xue Chunyun Lei Shaowei Xue yi Sun Bin Zhu Ke Shao Xingkun hu Meihua Xiong Jun Du Bin He Tao Yan yingying huang Yuanchao Zou Biwen Xie Yongming Wang Bin Li Fei Liu Yaoyao Zhang Fei Fan Zhijian Wang Jing huang Haoran Gu Hailong Ge Yan Dan Yan Li Shuqiao Wang chuang Zhang Lu Zhou Xue Wang sheng Zeng Yan Xiang Xugang He Jianhui Qin Chengxing Xia Jie hou yifu Shi Lifang Gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo yang Shaoping Liu zhaohui Ni hui Zhang Kai Liu Feng zhao yingren Li Jianwei Wang Qiwei Wei yangtze River Fisheries Research Institute Chinese Academy of Fishery SciencesWuhan430223China Institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and Environment Research Center Chinese Academy of Fishery SciencesBeijing100141China Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesShanghai200090China Institute of Fisheries Engineering Chinese Academy of Fishery SciencesBeijing100141China hunan Fisheries Science Institute Changsha410153China Jiangxi Fisheries Research Institute Nanchang330039China Jiujiang Academy of Fishery Sciences Jiujiang332000China School of Life Sciences Nanchang UniversityNanchang330031China Qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan Academy of Fishery Sciences Kunming650111China Institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries Institute Sichuan Academy of Agricultural SciencesChengdu611731China School of Life Sciences Neijiang Normal UniversityNeijiang641100China School of Life Sciences Southwest UniversityChongqing400715China Chongqing Fishery Sciences Research Institute Chongqing401120China Guizhou Fisheries Research Institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China hubei Fisheries Science Research Institute Wuhan430070China Shaanxi Fisheries Research Institute Xi’an710086China Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China Nanjing Institute of Geography and Limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning Institute of State Forestry and Grassland Administration Changsha410014China

The yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of yangtze Fisheries Resources and Environment Investigation(2017-2021)supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 24 institutes and universities that located in the yangtze River basin surveys the status of(1)fish species composition and spatial distribution,(2)current fish abundance,(3)endangered fishes,(4)yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the yangtze River mainstream and 10 of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang *** results showed that there were 443 fish species(belonging to 163 genus,37 families,and 18 orders)before 2017,but only 323 fish species(including 15 new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole yangtze River *** is estimated that there were 886 million individuals weighing 124.8 million kg,merely equivalent to 27.3%of the resources in 1950s,30.9%of the resources in 1960s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the yangtze River system,only 15 of 29 were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes yangtze finless porpoise Resources Aquatic ecosystem Fisheries Background investigation yangtze river system

The Jiao Tong University Spectroscopic Telescope Project

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Astronomical Techniques and Instruments 2024年第1期1卷 16-30页

作者： JUST Team Chengze Liu ying Zu Fabo Feng zhaoyu Li Yu Yu hua Bai Xiangqun Cui Bozhong Gu yizhou Gu Jiaxin Han Yonghui hou Zhongwen hu Hangxin Ji yipeng Jing Wei Li zhaoxiang Qi Xianyu Tan Cairang Tian Dehua yang Xiangyan Yuan Chao Zhai Congcong Zhang Jun Zhang Haotong Zhang Pengjie Zhang Yong Zhang yi zhao Xianzhong Zheng Qingfeng Zhu Xiaohu yang Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China Department of Astronomy School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Nanjing Institute of Astronomical Optics&Technology Chinese Academy of SciencesNanjing 210042China University of Chinese Academy of Sciences NanjingNanjing 211135China University of Chinese Academy of Sciences Beijing 101408China Lenghu Technology Innovation Industrial Park Management Committee Lenghu 817400China Shanghai Astronomical Observatory Chinese Academy of SciencesShanghai 200030China Department of Astronomy University of Science and Technology of ChinaHefei 230026China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China

The Jiao Tong University Spectroscopic Telescope(JUST)is a 4.4-meter f/6.0 segmented-mirror telescope dedicated to spectroscopic *** JUST primary mirror is composed of 18 hexagonal segments,each with a diameter of 1.1 *** provides two Nasmyth platforms for placing science *** Nasmyth focus fits a field of view of 10′and the other has an extended field of view of 1.2°with correction optics.A tertiary mirror is used to switch between the two Nasmyth *** will be installed at a site at Lenghu in Qinghai Province,China,and will conduct spectroscopic observations with three types of instruments to explore the dark universe,trace the dynamic universe,and search for exoplanets:(1)a multi-fiber(2000 fibers)medium-resolution spectrometer(R=4000-5000)to spectroscopically map galaxies and large-scale structure;(2)an integral field unit(IFU)array of 500 optical fibers and/or a long-slit spectrograph dedicated to fast follow-ups of transient sources for multi-messenger astronomy;(3)a high-resolution spectrometer(R~100000)designed to identify Jupiter analogs and Earth-like planets,with the capability to characterize the atmospheres of hot exoplanets.

关键词： Astronomical instrumentation Optical telescopes Large-scale structure of the universe Redshift surveys Time domain astronomy Exoplanet astronomy

Inhibiting autophagy enhances sulforaphane-induced apoptosis via targeting NRF2 in esophageal squamous cell carcinoma

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2021年第5期11卷 1246-1260页

作者： zhaoming Lu Yandan Ren Li yang Ang Jia yi hu Yu zhao Wuduo zhao Bin Yu Wen zhao Jianying Zhang Guiqin hou State Key Laboratory of Esophageal Cancer Prevention&Treatment School of Pharmaceutical SciencesZhengzhou UniversityZhengzhou 450001China Collaborative Innovation Center of Cancer Chemoprevention Zhengzhou 450001China Center of Advanced Analysis&Gene Sequencing Zhengzhou UniversityZhengzhou 450001China Henan Academy of Medical and Pharmaceutical Sciences Zhengzhou UniversityZhengzhou 450052China Key Laboratory of Advanced Drug Preparation Technologies Ministry of EducationZhengzhou UniversityZhengzhou 450001China

Sulforaphane(SFN), a natural anti-tumor compound from cruciferous vegetables, has been reported to induce protective autophagy to cancer cells, which might impair the anti-tumor efficiency of SFN. However, the accurate function and mechanism of SFN inducing autophagy in cancers are still obscure, especially in esophageal squamous cell carcinoma(ESCC), one of malignancies with high incidence in North China. Here, we mainly explored the potential function of autophagy upon SFN treatment in ESCC and molecular mechanism. We demonstrated that SFN could inhibit cell proliferation and induce apoptosis by activating caspase pathway. Moreover, we found activation of NRF2 pathway by SFN was responsible for the induction of autophagy and also a disadvantage element to the anti-tumor effects of SFN on ESCC, indicating that SFN might induce protective autophagy in ESCC. We, therefore,investigated effects of autophagy inhibition on sensitivity of ESCC cells to SFN and found that chloroquine(CQ) could neutralize the activation of SFN on NRF2 and enhance the activation of SFN on caspase pathway, thus improved the anti-tumor efficiency of SFN on ESCC in vitro and in vivo. Our study provides a preclinical rationale for development of SFN and its analogs to the future treatment of ESCC.

关键词： Sulforaphane Autophagy Chloroquine NRF2 Esophageal squamous cell carcinoma

水源地水库富营养化演变及防治对策——以浙江老虎潭水库为例

在线全文

学校读者我要写书评

暂无评论

水生态学杂志 2024年第5期45卷 133-141页

作者：彭如初章铭娄静媛李嗣新赵文通侯一航胡菊香赵先富湖州中环原水有限公司浙江湖州313000 水利部中国科学院水工程生态研究所水利部水工程生态效应与生态修复重点实验室湖北武汉430079 河海大学水利水电学院江苏南京210098 上海海洋大学水产与生命学院上海200090

基于长期监测数据分析水库富营养化演变规律和影响因子,为制定防治对策提供依据。以浙江湖州老虎潭水库为例,收集2009-2021年历史数据,并于2022年3月-2023年2月开展为期1年的监测,分析水库及入库支流水质时空变化特征。结果表明,2009-2... 详细信息

基于长期监测数据分析水库富营养化演变规律和影响因子,为制定防治对策提供依据。以浙江湖州老虎潭水库为例,收集2009-2021年历史数据,并于2022年3月-2023年2月开展为期1年的监测,分析水库及入库支流水质时空变化特征。结果表明,2009-2022年,老虎潭总体呈中营养状态,总氮长期处于Ⅳ~劣Ⅴ类水平,总磷多为Ⅲ类,氨氮呈显著下降趋势(P<0.01),库区不同临测点水质和营养状态差异较小。入库支流水质明显劣于库区,是库区氮、磷等营养盐的主要来源;支流总氮、总磷分别以劣Ⅴ类和Ⅳ类为主,2014-2022年仅硝酸盐氮浓度显著下降,2022年以来支流总磷浓度有所升高。氮主要来自农业面源污染,磷的来源较为复杂,包括农业、生活污水等多种途径。总氮、总磷、氨氮三者显著正相关,且与叶绿素a密切相关,反映出氮、磷输入促进了藻类的生长。老虎潭水库目前尚未见大面积藻华,但极端天气或全球变暖可能加剧其富营养化风险。建议采取流域面源污染控制、河口湿地修复、水库生态调控等措施加以防控。

关键词：水源地富营养化长时间序列入库支流老虎潭水库

维普期刊数据库博看期刊

自动电位滴定法测定热镀锌助镀剂中氯化铵的含量

在线全文

学校读者我要写书评

暂无评论

现代化工 2024年第9期44卷 247-250页

作者：侯静胡艳舒包涵胡优石张一驰赵学聪康莲薇河北工程大学材料科学与工程学院河北邯郸056000 河北欧润科学仪器股份有限公司河北石家庄050000

建立了自动电位滴定法准确测定热镀锌助镀剂中氯化铵含量的方法,探讨了自动电位滴定法测定热镀锌助镀剂中氯化铵含量的复合掩蔽剂A用量、复合掩蔽剂加入的介质条件和滴定起始pH对滴定突跃的影响。进行了相应的方法学验证。结果显示,对... 详细信息

建立了自动电位滴定法准确测定热镀锌助镀剂中氯化铵含量的方法,探讨了自动电位滴定法测定热镀锌助镀剂中氯化铵含量的复合掩蔽剂A用量、复合掩蔽剂加入的介质条件和滴定起始pH对滴定突跃的影响。进行了相应的方法学验证。结果显示,对于氯化铵含量为10 g/L的助镀剂在体系介质pH为5~6时加入复合掩蔽剂A溶液15 mL、体积比为1∶1的甲醛水溶液5 mL,用0.1 mol/L氢氧化钠溶液自动电位滴定仪滴定。方法学验证显示,线性回归方程为y=0.934 9x-0.043 25,r^(2)=1,氯化铵在5~40 g/L范围内与氢氧化钠消耗量呈良好的线性关系;重复测定6次,样品加标回收率范围在100.1%~100.8%,表明该方法的准确度高。不同人员和仪器7次测定消耗0.1 mol/L氢氧化钠的RSD值(n=7)为0.28%,氯化铵含量的RSD值(n=7)为1.28%,实验结果符合国家标准要求(RSD0.05)。

关键词：热镀锌助镀剂复合掩蔽剂自动电位滴定仪

Graphene oxide wrapped magnetic nanoparticle composites induced by SiO_(2) coating with excellent regenerability

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2021年第12期28卷 2001-2007页

作者： Zhong-liang hu hou-quan Cui Yan-huai Ding Jing-ying Li yi-rong Zhu zhao-hui Li College of Metallurgy and Material Engineering Hunan University of TechnologyZhuzhou 412007China College of Chemistry Xiangtan UniversityXiangtan 411105China Institute of Fundamental Mechanics and Materials Engineering Xiangtan UniversityXiangtan 411105China

Graphene oxide(GO)wrapped Fe_(3)O_(4) nanoparticles(NPs)were prepared by coating the Fe_(3)O_(4) NPs with a SiO_(2) layer,and then modifying by amino groups,which interact with the GO nanosheets to form covalent *** SiO_(2) coating layer plays a key role in integrating the magnetic nanoparticles with the GO *** effect of the amount of SiO_(2) on the morphology,structure,adsorption,and regenerability of the composites was studied in *** appropriate SiO_(2) layer can effectively induce the GO nanosheets to completely wrap the Fe_(3)O_(4) NPs,forming a core-shell Fe_(3)O_(4)@SiO_(2)@GO composite where Fe_(3)O_(4)@SiO_(2) NPs are firmly encapsulated by GO *** optimized Fe_(3)O_(4)@SiO_(2)@GO sample exhibits a high saturated adsorption capacity of 253 mg·g^(-1) Pb(Ⅱ)cations from wastewater,and the adsorption process is well fitted by Langmuir adsorption ***,the composite displays excellent regeneration,maintaining a~90%adsorption capacity for five cycles,while other samples decrease their adsorption capacity *** work provides a theoretical guidance to improve the regeneration of the GO-based adsorbents.

关键词： composites composite coating

Experimental Study of Overtopping on Sea Dikes and Coastal Flooding Under the Coupled Processes of Tides and Waves

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2022年第3期36卷 413-426页

作者： LI Yan-ting ZENG Cheng-jie zhao yi-han hu Po SUN Tian-ting hou yi-jun MO Dong-xue WANG Deng-ting School of Civil Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Water Resources Department of Jiangsu Province Nanjing 210029China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Storm surges are cataclysmic natural disasters that occur along the coasts and are usually accompanied by large *** effects of coupled storm surges and waves can pose a significant threat to coastal *** labo-ratory studies on the effects of storm surges and waves on coastal structures have typically utilized steady water levels and constant wave *** indoor simulation of the coupled processes of tides and waves is developed by adding a tide generation system to an existing laboratory wave basin to model continuous dynamic tide levels so that tide generation and wave-making occur synchronously in the *** experimental methods are given,which are applied to further study waves overtopping on artificial sea dikes and coastal flooding evolution under the coupled actions of tides and *** results of the overtopping discharge obtained by the test with a dynamic water level are compared with those obtained from steady water level tests and the existing empirical *** addition,the impacts of ecological coastal shelterbelts and structures on coastal flood processes and distributions are also *** proposed simulation methods provide a new approach for studying the effects of storm surges and waves on coastal *** study also aims to provide a reference for coastal protective engineering.

关键词： storm surge water level variation wave overtopping coastal flooding experimental technique