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农业土壤中邻苯二甲酸酯分布特征及影响因素综述

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生态与农村环境学报 2024年第1期40卷 23-35页

作者：史陈雪武倩倩刘泉利赵健周俊丽任加国刘玥山东科技大学地球科学与工程学院山东青岛266510 中国环境科学研究院北京100012

邻苯二甲酸酯(PAEs)作为添加剂已被大量应用于农业投入品中,然而其却是一种具有“致癌、致畸、致突”作用的环境污染物。近年来,随着塑料制品的大量使用,PAEs已成为我国农业土壤中残留最多的有机污染物,引起了广泛关注。因此,了解当前... 详细信息

邻苯二甲酸酯(PAEs)作为添加剂已被大量应用于农业投入品中,然而其却是一种具有“致癌、致畸、致突”作用的环境污染物。近年来,随着塑料制品的大量使用,PAEs已成为我国农业土壤中残留最多的有机污染物,引起了广泛关注。因此,了解当前我国农业土壤中PAEs污染现状,对于选用恰当的土壤修复技术有着重要的科学意义。该文在系统梳理我国各地区农膜使用量、农田土壤中PAEs污染调查数据及不同蔬菜中不同种类PAEs含量的基础上,综述了全国尺度农业土壤中PAEs污染程度和分布特征,并通过对比统计分析的方法,得出典型区域农业土壤中PAEs浓度与农膜使用量、作物土地利用类型之间的响应关系。结果表明:(1)我国农业土壤已受到不同程度的PAEs污染,存在显著的区域差异;同时,我国农业土壤中PAEs浓度普遍高于国外,且邻苯二甲酸二丁酯(DBP)和邻苯二甲酸二(2-乙基己基)酯(DEHP)含量较高。(2)不同种类PAEs单体化合物在我国农业土壤中的分布具有空间规律。(3)我国农业土壤中PAEs分布特征主要受农膜使用量和农用地类型等宏观因素影响,也与土壤环境和PAEs单体理化性质等相关。

关键词：农业土壤酞酸酯分布特征空间分布影响因素

In vivo and in vitro anti-sepsis effects of physcion 8-O-β- glu- copyranoside extracted from Rumexjaponicus

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Chinese Journal of Natural Medicines 2017年第7期15卷 534-539页

作者： FU Wei-jun TANG Jian-jun WANG Hui WEI Hong-Yun CAI Shu-Min ZENG Zhen-Hua chen Hui chen Zhong-Qing Department of Intensive Care Medicine Nanfang Hospital Southern Medical University Guangzhou 510515 China Department of Anesthesiology Nan fang Hospital Southern Medical University Guangzhou 510515 China Department of Plastic and Reconstructive Surgery Nanfang Hospital Southern Medical University Guangzhou 510515 China

The present study was designed to investigate the anti-sepsis effects of physcion 8-O-β-glucopyranoside (POG) isolated from Rumex japonicas and explore its possible pharmacological mechanisms. POG was extracted from R. japonicas by bioactivity-guided isolation with the anti-sepsis agents. Survival analysis in septic mouse induced by LPS and heat-killed Escherichia coli were used to evaluate the protective effect of POG(40 mg·kg^(-1), i.p.) on sepsis. Cytokines including TNF-α, IL-1β and IL-6 in RAW 264.7 cells induced by LPS(100 ng·mL^(-1)) were determined by ELISA. In addition, the proteins expressions of TLR2 and TLR4 were determined by Western blotting assay. Our results demonstrated that POG(40 mg·kg^(-1), i.p.) possessed significant protective activity on the endotoxemic mice. The POG treatment(20, 40, and 80 μg·mL^(-1)) significantly decreased the TNF-α, IL-1β and IL-6 induced by LPS(P < 0.01) in a concentration-dependent manner. Furthermore, the TLR4 and TLR2 proteins were also down-regulated by POG at 20(P < 0.01), 40(P < 0.01), and 80 μg·mL^(-1)(P < 0.01). The present study demonstrated that the POG extracted from R. japonicas possessed significant anti-sepsis effect on endotoxemic mice, and can be developed as a novel drug for treating sepsis in the future.

关键词： Anti-sepsis TLR-4 TLR-2 Pro-inflammatory cytokines LPS

Preliminary analysis of fuel cycle performance for a small modular heavy water-moderated thorium molten salt reactor

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Nuclear Science and Techniques 2020年第11期31卷 23-35页

作者： ya-Peng Zhang Yu-Wen Ma Jian-Hui Wu Jin-Gen chen Xiang-Zhou Cai Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China CAS Innovative Academies in TMSR Energy System Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Heavy water-moderated molten salt reactors(HWMSRs)are novel molten salt reactors that adopt heavy water rather than graphite as the moderator while employing liquid *** to the high moderating ratio of the heavy water moderator and the utilization of liquid fuel,HWMSRs can achieve a high neutron *** this study,a large-scale small modular HWMSR with a thermal power of 500 MWth was proposed and *** criticality of the core was evaluated using an in-house critical search calculation code(CSCC),which was developed based on Standardized Computer Analyses for Licensing Evaluation,version *** preliminary fuel cycle performances(initial conversion ratio(CR),initialfissile fuel loading mass,and temperature coefficient)were investigated by varying the lattice pitch(P)and the molten salt volume fraction(VF).The results demonstrate that the temperature coefficient can be negative over the range of investigated Ps and VFs for both 233U-Th and LEU-Th fuels.A core with a P of 20 cm and a VF of 20%is recommended for 233U-Th and LEU-Th fuels to achieve a high performance of initial CR and fuel *** TRU-Th fuel,a core with a smaller P(~5 cm)and larger VF(~24%)is recommended to obtain a negative temperature coefficient.

关键词： Molten salt reactor Heavy water-moderated molten salt reactor(HWMSR) Th-U fuel cycle

Unrevealing the effects of low temperature on cycling life of 21700-type cylindrical Li-ion batteries

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Journal of Energy Chemistry 2021年第9期30卷 104-110页

作者： Daozhong Hu Gang chen jun Tian Ning Li Lai chen Yuefeng Su Tinglu Song Yun Lu Duanyun Cao Shi chen Feng Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of Technology100081 BeijingChina Beijing Institute of Technology Chongqing Innovation Center 401120 ChongqingChina Department of Testing Technology China North Vehicle Research Institute100072 BeijingChina Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of Technology100081 BeijingChina

The low-temperature performance of Li-ion batteries(LIBs) has important impacts on their commercial applications. Besides the metallic lithium deposition, which is regarded as one of the main failure mechanisms of the LIBs at low temperatures, the synergistic effects originating from the cathode, anode, electrolyte, and separators to the batteries are still not clear. Here, the 21700-type cylindrical batteries were evaluated at a wide range of temperatures to investigate the failure mechanism of batteries. Voltage relaxation, and the post-mortem analysis combined with the electrochemical tests, unravel that the capacity degradation of batteries at low temperature is related to the lithium plating at graphite anodes,the formation of unsatisfied solid deposited/decomposed electrolyte mixture phase on the anode, the precipitation of solvent in the electrolytes and the block of separator pores, and the uneven dissolved transition metal-ions from the cathode. We hope this finding may open up a new avenue to alleviate the capacity degradation of advanced LIBs at low temperatures and shed light on the development of outstanding low-temperature LIBs via simultaneous optimization of all the components including electrodes, electrolytes and separators.

关键词： Low temperature Cycling life Lithium plating Solid deposited/decomposed electrolyte mixture phase Voltage relaxation

基于QTL和转录组测序鉴定甘蓝型油菜耐旱候选基因

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作物学报 2024年第4期50卷 820-835页

作者：李阳阳吴丹许军红陈倬永徐昕媛徐金盼唐钟林张娅茹朱丽严卓立周清元李加纳刘列钊唐章林西部(重庆)科学城种质创制大科学中心重庆401329 西南大学农学与生物科技学院重庆400715 西南大学农业科学研究院重庆400715

干旱胁迫严重限制了甘蓝型油菜种植面积的扩大和产量的提升。耐旱性是由多基因控制的复杂数量性状,将QTL定位与转录组测序相结合,是鉴定甘蓝型油菜耐旱候选基因的有效手段。本研究对甘蓝型油菜干旱敏感品系三六矮和耐旱品系科里纳-2构建... 详细信息

干旱胁迫严重限制了甘蓝型油菜种植面积的扩大和产量的提升。耐旱性是由多基因控制的复杂数量性状,将QTL定位与转录组测序相结合,是鉴定甘蓝型油菜耐旱候选基因的有效手段。本研究对甘蓝型油菜干旱敏感品系三六矮和耐旱品系科里纳-2构建的F2:6和F2:8重组自交系群体幼苗进行正常灌溉和干旱胁迫处理,测定地上部鲜重、地上部干重、叶片相对含水量、丙二醛和可溶性糖含量,利用SSR和SNP多态性分子标记构建遗传连锁图谱,鉴定耐旱相关QTL和候选区间,结合耐旱材料No11和干旱敏感材料No28的转录组测序,筛选耐旱相关候选基因。研究结果表明:干旱胁迫使甘蓝型油菜幼苗地上部鲜重、地上部干重和叶片相对含水量下降,使叶片丙二醛和可溶性糖含量上升;耐旱相关QTL和候选区间分布于A01、A02、A06、A08、A09、A10、C02、C03、C04、C06和C09染色体;对耐旱材料和干旱敏感材料正常灌溉、干旱24 h、36 h和48 h进行转录组分析,主要差异表达基因显著富集到光合作用、脂肪酸代谢、氨基酸代谢、植物激素信号转导、核糖体、昼夜节律及角质、木栓素和蜡质的生物合成等相关途径;将QTL与转录组测序相结合,鉴定到28个耐旱相关候选基因,主要编码FLC、bHLH105、TGA4、TEM1、ERF003、ACO3、CHLI1、LHCB6和PORC等,具有转录因子活性、乙烯产生和信号传导、叶绿素生物合成与结合、叶绿素氧化还原酶以及编码核糖体相关蛋白等功能。这些结果可为揭示甘蓝型油菜耐旱机理及分子标记辅助选育耐旱新品种奠定基础。

关键词：甘蓝型油菜耐旱 QTL 转录组候选基因

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新型毛细管电泳法分离香烟中小分子有机酸

广州化工 2024年第16期52卷 52-55页

作者：杜赫李力群叶亚军于宏男刘月明高磊王嘉绍陈晨宁小平内蒙古昆明卷烟有限责任公司内蒙古呼和浩特010020

以巯基-β-环糊精修饰的金纳米颗粒(CD-AuNPs)作为缓冲液添加剂的毛细管电泳(CE)新体系完成了12种小分子有机酸的快速分离。与常规毛细管电泳法相比,新体系大大提高了分离效果,皆达到了基线分离。通过透射电镜等表征手段证明了CD-AuNPs... 详细信息

以巯基-β-环糊精修饰的金纳米颗粒(CD-AuNPs)作为缓冲液添加剂的毛细管电泳(CE)新体系完成了12种小分子有机酸的快速分离。与常规毛细管电泳法相比,新体系大大提高了分离效果,皆达到了基线分离。通过透射电镜等表征手段证明了CD-AuNPs的成功合成并探究了其浓度对新CE新体系的影响。以草酸和柠檬酸为模型,完善了CE新体系的定量检测方法并成功地鉴定了两种烟草制品中的11种小分子有机酸,其中草酸和柠檬酸的含量为8.12μg/g和21.51μg/g。

关键词：毛细管电泳功能化金纳米颗粒小分子有机酸烟草制品

Ultracompact Refractive Index Sensor Based on Surface-Plasmon-Polariton Interference

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Chinese Physics Letters 2012年第12期29卷 192-195页

作者： WANG chen chen Jian-jun TANG Wei-Hua XIAO Jing-Hua State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876 School of Science Beijing University of Posts and TelecommunicationsBeijing 100876

Using an ultracompact groove-slit-groove(GSG)structure,a refractive index sensor with a broadband response is proposed and experimentally *** to the interference of surface plasmon polaritons(SPPs),the transmission spectra in the GSG structure exhibit oscillation behaviors in a broad bandwidth,and they are quite sensitive to the refractive index of the *** on the principle,the characteristics of its refractive index sensing are demonstrated *** the experiment,the structure is illuminated with a bulk light source(not a tightly focused light source)from the back *** decreases the difficulty of the experimental measurement and can protect strong light sources from damaging the detection ***,the whole structure of the sensor can be made more ultracompact without considering the influence of the incident waves.

关键词： refractive compact structure

Design strategies for two-dimensional material photodetectors to enhance device performance

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InfoMat 2019年第1期1卷 33-53页

作者： jun Wang Jiayue Han Xiaoqing chen Xinran Wang School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengduP.R.China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengduP.R.China School of Microelectronics Xidian UniversityXianChina National Laboratory of Solid State Microstructures School of Electronic Science and Engineeringand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingChina

Two-dimensional(2D)materials are intensively attractive for fabricating high sensitive photodetectors in terms of atomically thin flexible and ultrafast charge transport *** to their atomically thin body,designing high performance detector requires new physical mechanisms and device *** this review,we classify design strategies and device structures into four categories depending on their physical mechanisms(photovoltaic effect,photoconductive effect,photothermoelectric effect or photobolometric effect,and surface plasma-wave-assisted effect),and summarize the device ***,future prospects and development direction for 2D material photodetectors are *** design strategies descriptions about photoelectronic detector provide a reference for high responsivity and fast response speed photodetector at broadband sensing in the future.

关键词： design strategy heterostructure organic materials photodetectors two-dimensional materials

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基于MIKE+的城市渠道初雨截流方案优化

水电能源科学 2024年第9期42卷 33-37,42页

作者：张玉浩米灿龙杨长河吴雪军陈战利陈文孙菲王震潘郴朱丹霞南昌市城市规划设计研究总院有限公司江西南昌330038 南昌大学资源与环境学院江西南昌330038 丹华水利环境技术有限公司上海200030

以南昌市南北连通渠区域为例,基于MIKE+平台构建研究区域包含初雨截流管、智能分流井和调蓄池等的管网、汇水区及水质模型,分析了现状初雨截流方案下各汇水区径流污染浓度、进入调蓄池的污染物总量和总水量,根据模拟结果确定径流污染控... 详细信息

以南昌市南北连通渠区域为例,基于MIKE+平台构建研究区域包含初雨截流管、智能分流井和调蓄池等的管网、汇水区及水质模型,分析了现状初雨截流方案下各汇水区径流污染浓度、进入调蓄池的污染物总量和总水量,根据模拟结果确定径流污染控制目标,并将汇水区划分为A、B、C三类汇水区,模拟优化方案下各区分流井在不同关闸时间下排入渠道的COD、TN、NH_(3)-N、TP平均浓度。结果表明,A、B、C区的分流井关闸时间分别为单次累计降雨5、8、9 mm后15 min时,能达到径流污染控制目标,优化方案较原方案调蓄池收集COD、TN、TP、NH_(3)-N总量分别提高21.59%、18.55%、17.30%、17.36%。研究结果亦可为类似初期雨水截流方案的选择提供建议及参考。

关键词：初期雨水径流污染控制 MIKE+模型智能分流井

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