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Two New Styryllactones from Goniothalamus cheliensis

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Chinese Chemical Letters 2003年第5期14卷 487-488页

作者： Si WANG Sheng jun dai Ruo Yun CHEN Shi Shan YU De Quan YU Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050

Two new styryllactones, iso-goniopypyrone and 8-acetyl-9-deoxygoniopypyrone, were isolated from the roots of Goniothalamus cheliensis. Their structure were elucidated on the basis of spectroscopic and chemical eviden... 详细信息

关键词： Goniothalamus cheliensis iso-goniopypyrone 8-acetyl-9-deoxygoniopypyrone.

Intercalation-deintercalation design in MXenes for high-performance supercapacitors

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Nano Research 2022年第4期15卷 3213-3221页

作者： Zhenjiang Li jun dai Yiran Li Changlong Sun Alan Meng Renfei Cheng Jian Zhao Minmin Hu Xiaohui Wang School of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266061China College of Electromechanical Engineering Qingdao University of Science and TechnologyQingdao 266061China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China State Key Laboratory Base of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

MXene is a new intercalation pseudocapacitive electrode material for supercapacitor *** fast ion diffusion is significantly essential for MXene to achieve excellent electrochemical *** expansion of interlayer void by traditional spontaneous species intercalation always leads to a slight increase in capacitance due to the existence of species sacrificing the smooth diffusion of electrolyte ***,an effective intercalation-deintercalation interlayer design strategy is proposed to help MXene achieve higher *** cation intercalation leads to the expansion of interlayer *** electrochemical cation extraction,intercalated cations are deintercalated mostly,leaving a small number of cations trapped in the interlayer silt and serving as pillars to maintain the interlayer space,offering an open,unobstructed interlayer space for better ion migration and ***,a preferred surface with more-O terminations for redox reaction is created due to the reaction between cations and-OH *** a result,the processed MXene delivers a much improved capacitance compared to that of the original Ti_(3)C_(2)T_(x)electrode(T stands for the surface termination groups,such as-OH,-F,and-O).This study demonstrates an improvement of electrochemical performance of MXene electrodes by controlling the interlayer structure and surface chemistry.

关键词： MXene electrochemical ion intercalation−deintercalation interlayer design supercapacitor energy storage

Activation of NLRP3 Inflammasome via Drp1 Overexpression in Kupffer Cells Aggravates Ischemia-reperfusion Injury in Hepatic Steatosis

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Journal of Clinical and Translational Hepatology 2023年第5期11卷 1069-1078页

作者： Lu Zhang Mingfu Wang Ran An jun dai Shujun Liu Ming Chen Haoran Ding Department of Hepatobiliary Surgery Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjingJiangsuChina Surgery Department I Zhangjiagang Traditional Chinese Medicine HospitalSuzhouJiangsuChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Wannan Medical CollegeWuhuAnhuiChina Department of Hepatobiliary Surgery Nanjing Drum Tower HospitalClinical College of Traditional Chinese and Western MedicineSchool of PharmacyNanjing University of Chinese MedicineNanjingJiangsuChina

Background and Aims:Donors with fatty livers are considered to address the shortage of livers for transplantation,but those livers are particularly sensitive to ischemia-reperfusion injury(IRI),and an increased incidence of graft failure is *** cells account for 20–35%of liver nonparenchymal cells,and have been shown to participate in the process of IRI and inflammatory reactions of hepatic ***-like receptor thermal protein domain-associated protein 3(NLRP3)is an intracellular sensor activated by Kupffer cells to promote generation and participates in ***-associated protein 1(Drp1)is one of the main proteins regulating mitochondrial division and exacerbates IRI by affecting mitochondrial *** mechanism of interaction of Kupffer cells with Drp1 and NLRP3 to aggravate IRI has not been ***:A mouse model of hepatic steatosis was established by feeding the mice with a high-fat *** vitro experiments were performed using AML12 normal mouse liver cells and RAW264.7 mononuclear macrophage cells cultured in medium with palmitate and oleic *** blotting and immunohistochemical(IHC)staining were used to detect the expression of NLRPP3 and Drp1 in IRI in the control and high-fat diet *** expression of F4/80+cells during IRI in hepatic steatosis was verified by IHC staining,and the role of NLRPP3 and Drp1 in Kupffer-cell mediated IRI was investigated by targeting Drp-1 ***:Drp1 and NLRP3 expression was increased during IRI in hepatic steatosis,and the expression of Drp1 and NLRP3 were decreased after the elimination of Kupffer *** indicated Kupffer cells were involved in the process of IRI in hepatic steatosis through the action of Drp1 and *** Drp1 inhibition,liver function was restored and NLRP3 expression level was ***:Kupffer cells aggravated IRI in hepatic steatosis via NLRP3 and ***1 inhibitors might be useful as specific therapeutics to alleviate IRI

关键词： Drp1 Kupffer cells NLRP3 Hepatic steatosis Ischemia-reperfusion

A Versatile Coating Approach to Fabricate Superwetting Membranes for Separation of Water-in-Oil Emulsions

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Chinese Journal of Polymer Science 2016年第10期34卷 1234-1239页

作者： Yi Hou Chun-ting Duan 赵宁 Huan Zhang Yi-ping Zhao Li Chen Hong-jun dai 徐坚 School of Materials Science and Engineering Tianjin Polytechnic University Tianjin 300387 China Beijing National Laboratory for Molecular Sciences Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China SEAPS Science & Technology Co. Ltd. Caofeidian Industrial Zone Tangshan 063000 China

Separation of oil/water mixtures, especially for the emulsified oil/water mixtures, is important because of the frequent occurrence of oil spill accidents. Utilizing superwetting porous membrane has become a promising approach to separate either surfactant-free or surfactant-stabilized emulsions. Herein we report a facile and versatile strategy for preparing hydrophobic/under-oil superhydrophobic membranes by coating the skeletons of the membranes with the poly[（3,3,3- trifluoropropyl）methylsiloxane] （PTFPMS） nanoparticles. The obtained membranes could be used to separate various water- in-oil emulsions with high flux and separation efficiency. In addition, owning to the outstanding resistance of PTFPMS to the most organic solvents or oils, the modified membranes exhibited the excellent reusability and the antifouling properties that were critical in the practical applications. Many commercially available membranes can be modified by such a simple method.

关键词： Emulsion Membrane Separation Superwetting Poly[(3,3,3-trifluoropropyl)methylsiloxane].

Earthworm biomass and population structure are negatively associated with changes in organic residue nitrogen concentration during vermicomposting

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Pedosphere 2021年第3期31卷 433-439页

作者： Bo ZHOU Yiyong CHEN Chi ZHANG Jianlong LI Hao TANG Jiayu LIU jun dai Jinchi TANG Tea Research Institute Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Laboratory of Tea Plant Resources Innovation and UtilizationGuangzhou 510640China College of Natural Resources and Environment South China Agricultural University/Key Laboratory of the Ministry of Agriculture for South China Farmland ConservationGuangzhou 510642China

Vermicomposting is an efficient and environmentally friendly technology to dispose of agricultural organic *** efficiency of organic residue decomposition during vermicomposting is directly affected by the biomass and population structure of *** this study,we investigated how the earthworm biomass and population structure responded to changes in the physicochemical properties of six types of organic residue(cattle dung,herbal waste,rice straw,soybean straw,garden waste,and tea residues)during *** type of organic residues was placed in a pot with earthworms Eisenia fetida,and the physicochemical properties of the organic residues and earthworm growth dynamics were recorded at 0,30,60,and 90 d of *** biomass and population structure of earthworms were stable or increased in rice straw,garden waste,and cattle dung within 60 d of vermicomposting,whereas in tea residues and herb waste,very little earthworm activity(3 adults and 2 cocoons)was recorded on day *** the physicochemical parameters,the substrate C/N ratio was negatively correlated with earthworm growth *** organic residues showed higher NH_(4)^(+)-N and NH_(3)^(-)-N concentrations but a lower total organic carbon content,which negatively affected earthworm growth and *** recommend that chemical properties of vermicomposting systems should be monitored *** the threshold levels of decomposing organic residue NH_(4)^(+)-N and NH_(3)^(-)-N concentrations,earthworms should be removed and the vermicompost can be ***-and large-scale farmers thus need to monitor the physicochemical properties of vermicompost to sustain active earthworm populations.

关键词： ammonium nitrogen decomposing earthworm biological traits Eisenia fetida nitrate nitrogen organic residue dispose physicochemical property

New Respirable Dust Suppression Systems for Coal Mines

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Journal of China University of Mining and Technology 2007年第3期17卷 321-325页

作者： XIE Yao-she FAN Gao-xian dai jun-wei SONG Xiao-bo School of Mining and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Jining Mining Industry Group Co Ltd Jining Shandong 272100 China

Dust suppression in coal mines is a worldwide problem which has not been solved effectively. The applica-tion of negative pressure secondary dust removal (NPSDR) is a breakthrough in the coal mine safety field. In this paper,NPSDR technology and ultrasonic dust suppression systems are introduced. High pressure water is supplied to the NPSDR device which is mounted on the shearer. A negative pressure field is formed in the device. At the same time,the dusty air around the shearer drum will be sucked into,and purged from,the NPSDR device by the negative pressure field. An ultrasonic dust suppression system uses water and compressed air to produce micron sized droplets which suppress respirable coal dust effectively. The NPSDR technology can be used for shearer dust suppression while ultra-sonic dust suppression can be applied in areas such as the transportation positions. These dust suppression methods have the following advantages: high efficiency,wide applicability,simple structure,high reliability and low cost.

关键词： dust suppression negative pressure ultrasonic compressed air respirable dust

Efficient AcrH2 Catalyzed β-Trifluoromethylation of Carbonyl Compounds by Atom Transfer Radical Addition Reactions

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Chinese Journal of Chemistry 2019年第10期37卷 1025-1030页

作者： Zi-Peng Rao Yu-Yang Sun Xin-Feng Zhou Qiang Xie Hui-Xia Zhu Jian-jun dai jun Xu Hua-Jian Xu School of Food and Biological Engineering Hefei University of TechnologyHefeiAnhui 230009China PET-CT Center The First Affiliated Hospital of USTCHefeiAnhui 230001China

The use of organic catalysis AcrH2 enables the direct β-trifluoromethylation of carbonyl compounds by atom transfer radical addition reactions with broad substrate scopes under mild *** operationally simple and robust protocol successfully converts a variety of β-chloro carbonyl compounds into the corresponding α-chloro-β-fluoroalkylcarbonyl products.A significant advantage of this method is that it does not require the use of a metal catalyst,thereby avoiding metal residue problems in drug synthesis.

关键词： synthesis. conditions. carbonyl

Motion direction prediction through spike timing based on micro Capsnet networks

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Science China(Technological Sciences) 2022年第11期65卷 2763-2775页

作者： ZHANG HuaLiang LIU Ji WANG BaoZeng dai jun LIAN JinLing KE Ang ZHAO YuWei ZHOU Jin WANG ChangYong Bejing Institute of Basic Medical Sciences Bejing 100850China School of Artificial Intlligence and Automation Huazhong University of Science and TechnologyWuhan 430074China

Neural activity extraction and neural decoding from neural signals are an important part of critical components of brain-computer interface *** the development of brain-computer interface technology,the demand for precise external control and nervous activities in macaque monkey during unilateral hand grasp has increased the complexity of control and neural decoding,which puts forward higher requirements for the accuracy and stability of feature extraction and neural *** this study,a micro Capsnet network architecture that consists of a few network layers,a vector feature structure,and optimization network parameters,is proposed to decrease the computing time and complexity,decrease artificial debugging,and improve the decoding *** with KNN,SVM,XGBOOST,CNN,Simple RNN,and LSTM,the algorithm in this study improves the decoding accuracy by 98.03%,and achieves state-of-the-art accuracy and stronger ***,the proposed algorithm can further enhance the control accuracy in the brain-computer interface.

关键词： spike timing micro Capsnet network brain-computer interface motion direction prediction optimized network parameter

Development of Job Burden-capital Model of Occupational Stress： An Exploratory Study

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Biomedical and Environmental Sciences 2016年第9期29卷 678-682页

作者： WANG Chao LI Shuang LI Tao YU Shan Fa dai jun Ming LIU Xiao Man ZHU Xiao jun National Institute of Occupational Health and Poison Control Chinese Center for Disease Control and Prevention Beijing 200050 China Graduate School of Chinese Center for Disease Control and Prevention Beijing 202206 China Department of Occupational Health Surveillance Prevention and Treatment Center for Occupational Diseases Zhengzhou 450052 Henan China School of public health Fudan University Shanghai 200032 China

This study proposes a new framework as job burden-capital model for comprehensive assessment on occupational stress. 1618 valid samples were recruited from electronic manufacturing service industry in Hunan province by self-rated questionnaires after written consent. Structural equation model analysis was employed to verify the model by the data collected. The final fitting model has satisfactory fitting goodness （CMIN/DF=5.78, AGFI=0.937, NNFI=0.960, IF1=0.968, RMSEA=0.054）. Both of the measurement model and structural model have acceptable path Ioadings. Job burden and capital could either directly affect occupational outcomes or indirectly influence them through equation personality.

关键词： Development of Job Burden-capital Model of Occupational Stress