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Differences in Toxicokinetics and Maternal Transfer between Lipophilic and Proteinophilic Halogenated Organic Pollutants in Laying Hens

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Environment & Health 2024年第10期2卷 712-720页

作者： Xiao-Jun Luo Qun-Jie feng Chu-Hong Zhu Xi Chen Peng-Peng Chen Yan-Hong Zeng Bi-xian Mai State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640P.R.China State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China

In this study,we conducted exposure experiments on egg-laying hens to explore the toxicokinetics and maternal transfer characteristics of lipophilic and proteinophilic halogenated organic pollutants(HOPs).The lipophilic HOPs included polychlorinated biphenyls(PCBs),polybrominated diphenyl ethers(PBDEs),and dechlorane plus(DPs),while the proteinophilic HOPs included perfluorocarboxylic acids(PFCAs).The results revealed that most of lipophilic HOPs exhibit lower depuration rate(kd)than *** kd of lipophilic HOPs correlated with the octanol−water partition coefficient(log KOW)values in a V-shaped curve,whereas that of PFCAs correlated with the protein−water partition coefficient(log KPW)values in an inverted V-shaped *** depuration rate,rather than the uptake rate,was a leading factor in determining the bioaccumulation potential of HOPs in *** the dominant factors determining the tissue distribution of the two types of compounds were explicit(fats vs phospholipids),chemical-specific tissue distribution was still *** egg-maternal concentration ratio was dependent on the exposure status,concentration,and maternal tissue *** a single maternal tissue may not be an appropriate method for assessing chemical maternal transfer *** have a greater maternal transfer potential(>80%of the total body burden)than lipophilic HOPs(approximately 30%for BDE209 and DPs,and less than 10%for the others).Their lipophilic and partly proteinophilic nature makes the toxicokinetics and maternal transfer characteristics of BDE209 and DPs different from those of other lipophilic *** findings are crucial for enhancing our understanding of the behavior and fate of HOPs in egg-laying hens.

关键词： halogenated organic pollutants laying hens toxicokinetic maternal transfer

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The First Reported Case of Co-Infection with Neisseria Meningitidis and Bordetella Pertussis in the Cerebrospinal Fluid Specimen of a Normal Four-Year-Old Child

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Biomedical and Environmental Sciences 2024年第4期37卷 432-435页

作者： XIA xian LI Guo Ming TANG Yi WANG Si Quan HE Fei JIANG Yong Zhong YANG Hong Mei JIANG Hong Lin LYU Jing MAO Ling feng Hubei Key Laboratory of Edible Wild Plants Conservation&Utilization Hubei Normal UniversityHuangshi 430070HubeiChina Hubei Provincial Center for Disease Control and Prevention Wuhan 430079HubeiChina Joint Research Center for Molecular Diagnosis of Severe Infection in Children Binjiang Institute of Zhejiang UniversityHangzhou 310058ZhejiangChina

Pertussis is an acute and highly contagious respiratory disease caused by Bordetella pertussis(***),which occurs in people of all ages and is most dangerous for young children,especially *** introduction of whole-cell pertussis vaccines(wPVs)in the 1950s dramatically reduced the incidence of pertussis worldwide[1].However,over the past two decades,many studies have reported the resurgence of pertussis in different countries[2].Epidemiological surveillance in Hubei Province over the last 3 years revealed a clear increasing trend in the incidence of pertussis during the coronavirus disease 2019(COVID-19)epidemic.

关键词： Pertussis dangerous Hubei

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Electrically tunable phase-change metasurface for dynamic infrared thermal camouflage

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Photonics Research 2024年第2期12卷 292-300页

作者： YUfeng XIONG YUNZHENG WANG CHAO feng YAOLAN TIAN LIANG GAO JUN-LEI WANG ZHUANG ZHUO xian ZHAO Center for Optics Research and Engineering Key Laboratory of Laser&Infrared SystemMinistry of EducationShandong UniversityQingdao 266237China School of Information Science and Engineering Shandong UniversityQingdao 266237China

Dynamic infrared thermal camouflage technology has attracted extensive attention due to its ability to thermally conceal targets in various environmental backgrounds by tuning thermal *** use of phase change materials(PCMs)offers numerous advantages,including zero static power,rapid modulation rate,and large emissivity tuning ***,existing PCM solutions still encounter several practical application challenges,such as temperature uniformity,amorphization achievement,and adaptability to different *** this paper,we present the design of an electrically controlled metal-insulator-metal thermal emitter based on a PCM metasurface,and numerically investigate its emissivity tunability,physical mechanisms,heat conduction,and thermal camouflage performance across different ***,the influence of the quench rate on amorphization was studied to provide a guidance for evaluating and optimizing device *** results reveal that the thermal emitter exhibits a wide spectral emissivity tuning range between 8 and 14μm,considerable quench rates for achieving amorphization,and the ability to provide thermal camouflage across a wide background temperature ***,it is anticipated that this contribution will promote the development of PCM-based thermal emitters for practical dynamic infrared thermal camouflage technology with broad applications in both civilian and military domains.

关键词： thermal dynamic phase

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Audio-guided self-supervised learning for disentangled visual speech representations

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Frontiers of Computer Science 2024年第06期18卷 186353-186353页

作者： feng Dalu YANG Shuang shan Shiguang CHEN Xilin Key Laboratory of Intelligent Information Processing of Chinese Academy of Sciences Institute of Computing Technology Chinese Academy of Sciences University of Chinese Academy of Sciences

In this paper, we propose a novel two-branch framework to learn the disentangled visual speech representations based on two particular observations. Its main idea is to introduce the audio signal to guide the learning of speech-relevant cues and introduce a bottleneck to restrict the speech-irrelevant branch from learning high-frequency and fine-grained speech cues. Experiments on both the word-level and sentence-level audio-visual speech datasets LRW and LRS2-BBC show the effectiveness. Our future work is to explore more explicit auxiliary tasks and constraints beyond the reconstruction task of the speech-relevant and irrelevant branch to improve further its ability of capturing speech cues in the video. Meanwhile, it’s also a nice try to combine multiple types of knowledge representations [10] to further boost the obtained speech epresentations, which is also left for the future work.

关键词： Knowledge representation

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Modulated noble metal/2D MOF heterostructures for improved hydrogen storage of MgH_(2)

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Rare Metals 2024年第4期43卷 1672-1685页

作者： Zeng-Yi Li Li-xian Sun Fen Xu Yu-Mei Luo Yong-Peng Xia Sheng Wei Chen-Chen Zhang Ri-Guang Cheng Chao-feng Ye Meng-Yuan Liu Ju-Lan Zeng Zhong Cao Hong-Ge Pan School of Material Science and Engineering Guilin University of Electronic TechnologyGuilin541004China School of Chemistry and Chemical Engineering Changsha University of Science and TechnologyChangsha410114China Institute of Science and Technology for New Energy Xi’an Technological UniversityXi’an710021China

The conjugation of external species with twodimensional(2D)materials has broad application *** this study,we have explored the potential of noble metal/2D MOF heterostructures in hydrogen ***,the MgH_(2)-Ni-MOF@Pd system has shown remarkable hydrogen desorption/sorption performances,starting to liberate hydrogen at 1810C,which is 2300C lower than that of pristine *** the catalytic effect of Ni-MOF@Pd,the dehydrogenation apparent activation energy of MgH2 is noticeably decreased from(133.5±17.5)to(34.58±1.87)kJ·moL^(-1),and the hydrogenation apparent activation energy is reduced from(70.41±7.43)to(25.78±4.64)kJ·moL^(-1),which is lowered by 63.4%.The fully-dehydrogenated MgH2-NiMOF@Pd composite rapidly uptakes hydrogen,with 2.62wt%at 100℃and 6.06 wt%at 150℃within 300 s,*** mechanism analysis of MgH2 catalyzed by Ni-MOF@Pd has revealed that the transformation of Mg_2Ni and Mg_2NiH_4 could act as a"hydrogen pump",providing numerous channels for fast diffusion and transport of hydrogen ***,in the dehydrogenation process,the element Pd reacts with MgH_(2)to form the MgPd alloy phase,which makes MgH_(2)take precedence to decompose through the Mg-Pd alloy rather than self-decomposition,further reducing thermal stability and improving de/hydrogenation *** synergistic effect of Mg-Pd,Mg_2Ni,and the special ultra-thin 2D sheet structure of the additive is the main reason for the good hydrogen storage property of MgH_(2)-Ni-MOF@*** findings provide inspiration for designing efficient multifunctional additives with unique morphologies to optimize the hydrogen desorption/sorption behaviors of hydrogen storage materials.

关键词： Hydrogen storage Magnesium hydride 2D metal-organic framework nanosheets Ni/Pd Synergistic catalysis

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帮工关系、帮工责任与用人者责任关系论

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当代法学 2024年第5期38卷 64-74页

作者：曹险峰吉林大学理论法学研究中心吉林大学法学院吉林大学司法数据应用研究中心

自明文规定帮工责任规则以来,《人身损害赔偿解释》一直都将帮工关系与帮工责任深度绑定,在符合其他构成要件的基础上,由帮工关系所产生的责任必为帮工责任,被帮工人因此承担无过错责任、替代责任。如此理解并不具正当性。《民法典》借... 详细信息

自明文规定帮工责任规则以来,《人身损害赔偿解释》一直都将帮工关系与帮工责任深度绑定,在符合其他构成要件的基础上,由帮工关系所产生的责任必为帮工责任,被帮工人因此承担无过错责任、替代责任。如此理解并不具正当性。《民法典》借鉴比较法通例,依据控制力标准动态区分用人者责任与承揽人责任,以体现替代责任与自己责任之分、无过错责任与过错责任之别,形成了“1:1”的二元模式,这一立场应予贯彻。在不同的帮工关系中,应基于被帮工人与帮工人间控制力的强弱,分别给予被帮工人替代责任或帮工人自己负担的评价,故应将司法解释规定的帮工责任规则置于《民法典》用人者责任与承揽人责任之二元模式下进行理解。既有帮工责任规则中的“无偿”“明确拒绝”与用人者责任规则具有适配性。

关键词：帮工责任用人者责任替代责任雇主责任帮工关系

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钢铁企业除尘用涤纶滤料在复杂烟气环境下的老化行为分析

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东北大学学报（自然科学版） 2024年第6期45卷 883-889页

作者：代峰柳静献东北大学资源与土木工程学院辽宁沈阳110819

为研究高温烟气中酸碱耦合作用对滤料性能的影响,在3种不同温度(45,75和130℃)下对涤纶滤料进行酸碱交互老化试验.发现涤纶滤料在高温酸碱耦合环境下的耐水解性能较差,且先受到碱再受到酸腐蚀对滤料产生巨大影响.在130℃下,经碱性环境... 详细信息

为研究高温烟气中酸碱耦合作用对滤料性能的影响,在3种不同温度(45,75和130℃)下对涤纶滤料进行酸碱交互老化试验.发现涤纶滤料在高温酸碱耦合环境下的耐水解性能较差,且先受到碱再受到酸腐蚀对滤料产生巨大影响.在130℃下,经碱性环境和酸性环境的交互老化后,滤料的拉伸断裂强力和面层剥离强力分别为由1638.8,143.1 N下降到1100.8,19.1 N,FT-IR(Fourier transform infrared spectroscopy)显示,C-O吸收峰减弱,表明水解过程中的聚对苯二甲酸乙二醇大分子链断裂,这也是发生水解和性能下降的主要原因.

关键词：涤纶针刺毡钢铁行业废气高温酸碱交互机械性能表面形貌化学结构

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Spatial-and spin-resolution ARPES and magnetism beamline at SSRF

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Nuclear Science and Techniques 2024年第8期35卷 23-37页

作者： Fang‑Yuan Zhu Jie‑feng Cao xiang‑Yu Meng Jun‑Qin Li Rui Yu Ya‑Mei Wang shan Qiao Bo Zhao Ming‑Zhu Zhang Zhong‑Kai Liu Mei‑Xiao Wang Yong Wang Ren‑Zhong Tai shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China shanghaiTech Laboratory for Topological Physics School of Physical Science and TechnologyShanghai Tech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China

The BL07U beamline is a new extreme ultraviolet and soft X-ray beamline housed in the shanghai Synchrotron Radiation Facility. Beamlines are used in nano-resolved angle-resolved photoemission spectroscopy(nano-ARPES), spin-resolved angle-resolved photoemission spectroscopy(spin-ARPES), X-ray magnetic circular dichroism spectroscopy, and X-ray magnetic linear dichroism spectroscopy for certain scientific research. The BL07U beamline, which is based on a pair of elliptical polarized undulators and a variable-included-angle plane-grating monochromator, delivers circularly or linear polarized X-rays within the energy range of 50–2000 eV. The beamline features two branches: One dedicated to nano-ARPES,which has a minimum spot size of only ~ 200 nm, and another branch comprising spin-ARPES, a vector magnetic field, and superconductive magnetic end-station.

关键词： Soft X-ray beamline Nano-ARPES Spin-ARPES XMCD/XMLD

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Ultrafast laser-induced decomposition for selective activation of GaAs

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Light(Advanced Manufacturing) 2024年第2期5卷 87-94页

作者： Ke-Mi Xu Chao Liu Lei Wang feng-Chun Pang Xin-Jing Zhao xian-Bin Li Qi-Dai Chen Wei-Qian Zhao MIIT Key Laboratory of Complex-field Intelligent Exploration School of Optics and PhotonicsBeijing Institute of TechnologyBeijing100081China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin University2699 Qianjin StreetChangchun 130012China

The manipulation of micro/nanostructures to customise their inherent material characteristics has garnered considerable *** this study,we present the selective activation of gallium arsenide(GaAs)via ultrafast laser-induced decomposition,which correlates with the emergence of ripples on the *** instigated a pronounced enrichment in the arsenic(As)concentration around the surface while inducing a depletion of gallium(Ga)at the structural *** simulations based on first principles exhibited a robust inclination towards the phase separation of GaAs,with the gasification of As-As pairs proving more facile than that of Ga-Ga pairs,particularly above the melting point of *** an illustrative application,a metal-semiconductor hybrid surface was confirmed,showing surface chemical bonding and surface-enhanced Raman scattering(SERS)through the reduction of silver ions on the laser-activated *** laser-induced selective activation holds promise for broader applications,including the controlled growth of Pd and the development of Au/Ag alloy-based platforms,and thereby opens innovative avenues for advancements in semiconductors,solar cell technologies,precision sensing,and detection methodologies.

关键词： Laser-induced activation Decomposition Laser-induced ripples Reduction SERS

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Side-Chain-Type Polyimide-Cu Complexes with Suppressed Activation Energy of Relaxation for Advanced High-Temperature Capacitor

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Chinese Journal of Polymer Science 2024年第8期42卷 1038-1048页

作者： Bai-Yang Zhou Ze-Tong Ma Shi-Long Zhong Zhen-Jie Huang Qi Guo Deng-Chong feng Zhong-Ke Yuan Shao-Lin Lu Yu-Zhao Yang Cheng Wang Ding-shan Yu Xu-Dong Chen Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Guangdong Engineering Technology Research Centre for High Performance Organic and Polymer Photoelectric Functional FilmsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Laboratory of Chemistry and Fine Chemical Industry Jieyang Centre Jieyang 515200China Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515031China

The burgeoning growth of the new energy vehicles and aviation industry has escalated the need for energy storage capacitors capable of stable operation in harsh *** advent of metal-polyimide complexes has illuminated a novel approach for preparing tem perature-resistant ***,the general application of these metal-polyimide com plexes is impeded by the high dielectric loss and low breakdown strength,consequences of main-chain coordination and excessive metal ions ***,our study proposes a novel polyimideCu complex material(POP-Cu)predicated on side-chain-type pyridine-Cu coordination,utilizing the structural backbone PMDA-ODA of mature commercial PI(Kapton)with reliable *** to the high degree of freedom afforded by the side chain with suppressed relaxation activation energy and the long-range electron delocalization formed by d-πcoordination,the dielectric constant of this material containing merely 2.7 mol%Cu increases from 3.25(POPI)to 5.58,while maintaining a remarkably low dielectric loss of ***,this material exhibits a substantial DC breakdown strength of 436.2 MV·m^(-1)and a high energy density of 5.42 J·cm^(-3),coupled with superior mechanical and thermal *** at 150℃,it retains over 90%of its room-temperature energy density,demon strating notable dielectric stability under high *** attributes underscore its promising application for capacitors operating in harsh environments.

关键词： Dielectric performance Polyimide complexes Side-Chain-Type High-temperature capacitor

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