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Mercury contents and potential exposure risk of rice-containing food products

Journal of Environmental Sciences 2025年第2期148卷 683-690页

作者： Xin wang Yingjun wang Yaqi Zhang Ziyan Liu Xiaomeng Ji Yong Cai Shandong Key Laboratory of Environmental Processes and health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Department of Chemistry&Biochemistry Florida International UniversityMiamiFL 33199USA

Mercury(hg),especially methylmercury(Mehg),accumulation in rice grain due to rice paddy possessing conditions conducive to hg methylation has led to human hg exposure through consumption of rice-based daily *** addition to being a food staple,rice is widely used as a raw material to produce a vast variety of processed food *** is known about hg levels in snacking rice-food products and potential hg exposure from consumption of them,besides previous studies on infant rice *** to provide complementary information for a more complete assessment on hg exposure risk originated from hgcontaining rice,this study determined total hg(thg)and Mehg levels in 195 rice-containing and rice-free processed food products covering all major types of snack foods marketed in China and the estimated daily intake(EDI)of dietary hg from the consumption of these *** results clearly showed thg and Mehg contents in rice-containing foods were significantly higher than rice-free products,suggesting the transfer of hg and Mehg from the rice to the end products,even after manufacturing ***,significant positive correlations were observed between thg,Mehg,or Mehg/thg ratio and rice content for samples containing multiple grains as ingredients,further indicating the deciding role of rice for hg levels in the end food *** the EDI of thg and Mehg via ricebased food products were relatively low compared to the reference dose,it should be considered these snacking food products would contribute additive hg intake outside of the daily regular meals.

关键词： Mercury Methylmercury Processed food products Rice Dietary exposure

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thermal fracture analysis of two collinear cracks in a functionally graded medium based on the three-phase-lag model

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Applied Mathematics and Mechanics(English Edition) 2025年第3期46卷 501-520页

作者： Zhangna XUE huameng wang Jianlin LIU Minjie WEN Z.t.ChEN College of Pipeline and Civil Engineering China University of Petroleum(East China) School of Civil Engineering and Architecture Zhejiang Sci-Tech University Department of Mechanical Engineering University of Alberta

the three-phase-lag(tPL) heat conduction model is an accurate representation of the actual heat transfer process. It would be interesting to investigate how the tPL model affects the thermal fracture behavior when there are defects existing in the medium. this paper aims to analyze the thermoelastic responses of two collinear cracks within a functionally graded half-space under thermal loadings by means of the tPL model. the thermoelastic problem is transformed into a series of singular integral equations using the integral transformation methods. the transient temperature and stress intensity factors(SIFs) are obtained through the application of Chebyshev *** effects of crack spacing and non-homogeneous parameters on the transient thermoelastic responses are presented, and the results of the tPL model are compared with those of the Fourier model, Cattaneo and Vernotte(CV) model, and dual-phase-lag(DPL)model. It is shown that crack spacing and non-homogeneous parameters have important effects on the thermoelastic responses, and the fluctuation phenomenon under the tPL model is the most pronounced due to the existence of the thermal displacement lag term.

关键词： Chebyshev polynomials

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Wafer‑Scale Vertical 1D GaN Nanorods/2D MoS_(2)/PEDOt:PSS for Piezophototronic Effect‑Enhanced Self‑Powered Flexible Photodetectors

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Nano-Micro Letters 2025年第3期17卷 102-116页

作者： Xin tang hongsheng Jiang Zhengliang Lin Xuan wang Wenliang wang Guoqiang Li State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640People’s Republic of China Department of Electronic Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640People’s Republic of China

van der Waals(vdW)heterostructures constructed by lowdimensional(0D,1D,and 2D)materials are emerging as one of the most appealing systems in next-generation flexible ***,hand-stacked vdW-type photodetectors are not compatible with large-areaarray fabrication and show unimpressive performance in self-powered ***,vertical 1D GaN nanorods arrays(NRAs)/2D MoS_(2)/PEDOt:PSS in wafer scale have been proposed for self-powered flexible photodetectors arrays *** as-integrated device without external bias under weak UV illumination exhibits a competitive responsivity of 1.47 A W^(−1)and a high detectivity of 1.2×10^(11)Jones,as well as a fast response speed of 54/71μs,thanks to the strong light absorption of GaN NRAs and the efficient photogenerated carrier separation in type-II ***,the strain-tunable photodetection performances of device have been ***,the device at−0.78%strain and zero bias reveals a significantly enhanced photoresponse with a responsivity of 2.47 A W^(−1),a detectivity of 2.6×10^(11)Jones,and response times of 40/45μs,which are superior to the state-of-the-art self-powered flexible *** work presents a valuable avenue to prepare tunable vdWs heterostructures for self-powered flexible photodetection,which performs well in flexible sensors.

关键词： Vertical nanorod arrays van der Waals heterostructure Piezophototronic effect Self-powered photodetection Flexible sensors

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Performance analysis of two-way relay mixed RF/FSO system with co-channel interference

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Optoelectronics Letters 2025年第2期21卷 85-89页

作者： wang Zhuo School of Optoelectronic Engineering Changchun University of Science and TechnologyChangchun 130022China

In this paper,the performance of a two-way relay (tWR) mixed radio frequency/free space optical (RF/FSO) system with co-channel interference (CCI) is *** from interference-limited one-way relay (OWR) system,CCIs should be considered at both relay and users in tWR ***,opportunistic user schedule is applied to select the user with the largest signal to interference plus noise ratio (SINR).Exact and asymptotic outage probability (OP) is *** bit error rate (BER) is further presented to evaluate the overall *** results show that the performance of a tWR system is dominated by the uplink or downlink whose performance is severer.

关键词： FSO channel system

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Spatiotemporal evolution of wildfire activity during the Paleocene-Eocene thermal Maximum in China

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Science China Earth Sciences 2025年第2期68卷 509-522页

作者： Xue-ting wang Zuoling ChEN Linlin CUI Xu wang State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences College of Earth and Planetary SciencesBeijing 100049China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

the Paleocene-Eocene thermal Maximum(PEtM)was the most prominent warming event in the Cenozoic and serves as a geological analog for the current global warming driven by anthropogenic CO_(2)emissions from burning fossil *** a primary disruptor of Earth's ecosystems,wildfire activity affects the balance of ecosystems,the global carbon cycle,and climate ***,studying the evolution and driving mechanisms of wildfires during the PEtM is essential for predicting wildfire activity under global warming scenarios and for understanding the carbon cycle in the context of wildfire *** research on wildfires during the PEtM has mainly focused on the Northern hemisphere,particularly Europe and North America,whereas studies on Chinese mainland remain *** this study,we analyzed black carbon(BC)concentration and carbon isotope(δ13C)in the Beigou section of the Nanyang Basin and the Xilutian section of the Fushun Basin to reconstruct the spatiotemporal evolution of wildfires in arid/semi-arid and humid *** integrated these findings with those of previous studies on the paleoclimate of the research area to elucidate the driving mechanisms behind wildfire *** results indicate that wildfire activity weakened at the onset of the PEtM,with the negative carbon isotope period characterized by low wildfire activity,except for a brief resurgence in the Nanyang *** the recovery phase of the PEtM,wildfire activity gradually increased,returning to the pre-PEtM *** prolonged low wildfire state was likely caused by extremely high temperatures and precipitation as well as the resulting vegetation *** the PEtM recovery phase,increased wildfire activity transformed“short-term carbon sinks”of the biological-atmospheric carbon cycle into“long-term carbon sinks”through the burial of *** process of carbon sink conversion may have acted as a negative feedback mechanism,contributing to carbon sequestration and the e

关键词： PEtM Wildfire Carbon cycle Nanyang Basin Fushun Basin

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Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes:accessingβ-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第1期68卷 257-263页

作者： Jiapian huang Chenxin wang Xu wang Xiaoyu Zhou Wei Xiao Jie Wu School of Pharmaceutical and Chemical Engineering&Institute for Advanced Studies Taizhou UniversityTaizhou 318000China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

the generation of variousβ-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is *** method features a broad substrate scope and excellent *** studies reveal that the dispersion interaction between sulfinyl group and Ch_(2)SO_(2)Ph group plays a crucial role in the stereoselectivity control.

关键词： β-chiral sulfones chiral cyclic sulfinamides sulfur dioxide insertion asymmetric radical cyclization stereoselectivity

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La-substituted W-type barium-nickel ferrites for tunable and high-performance electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 645-656页

作者： Long wang Jiurong Liu Shenghui Xie Yanli Deng Zhou wang Shanyue hou Shengying Yue Gang wang Na Wu Zhihui Zeng Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education and International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Army Engineering University of PLA College of Field Engineering Nanjing 210007China Laboratory for Multiscale Mechanics and Medical Science State Key Laboratory for Strength and Vibration of Mechanical StructuresSchool of AerospaceXi’an Jiaotong UniversityXi’an 710049China Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and TechnologyUniversity of Illinois at Urbana-ChampaignUrbana 61801USA School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

W-type barium-nickel ferrite(BaNi_(2)Fe_(16)O_(27))is a highly promising material for electromagnetic wave(EMW)absorption be-cause of its magnetic loss capability for EMW,low cost,large-scale production potential,high-temperature resistance,and excellent chemical ***,the poor dielectric loss of magnetic ferrites hampers their utilization,hindering enhancement in their EMW-absorption *** efficient strategies that improve the EMW-absorption performance of ferrite is highly desired but re-mains ***,an efficient strategy substituting Ba^(2+)with rare earth La^(3+)in W-type ferrite was proposed for the preparation of novel La-substituted ferrites(Ba_(1-x)LaxNi_(2)Fe_(15.4)O_(27)).the influences of La^(3+)substitution on ferrites’EMW-absorption performance and the dissipative mechanism toward EMW were systematically explored and ***^(3+)efficiently induced lattice defects,enhanced defect-induced polarization,and slightly reduced the ferrites’bandgap,enhancing the dielectric properties of the ***^(3+)also enhanced the ferromagnetic resonance loss and strengthened magnetic *** effects considerably improved the EMW-absorption perform-ance of Ba_(1-x)LaxNi_(2)Fe_(15.4)O_(27)compared with pure W-type *** x=0.2,the best EMW-absorption performance was achieved with a minimum reflection loss of-55.6 dB and effective absorption bandwidth(EAB)of 3.44 Ghz.

关键词： electromagnetic wave absorption W-type barium ferrite rare earth dielectric

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Silk damping in scalar-induced gravitational waves:a novel probe for new physics

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Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 75-81页

作者： Yan-heng Yu Sai wang theoretical Physics Division Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Physics University of Chinese Academy of SciencesBeijing 100049China

Silk damping is well known in the study of cosmic microwave background(CMB)and accounts for suppression of the angular power spectrum of CMB on large angular *** this article,we study the effect of Silk damping on the scalar-induced gravitational waves(SIGWs).Resulting from the dissipation of cosmic fluid,the Silk damping notably suppresses the energy-density spectrum of SIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting *** effect offers a novel observable for probing the underlying particle interaction,especially for those mediated by heavy gauge bosons beyond the standard model of *** anticipate that pulsar timing arrays are sensitive to gauge bosons with mass∼10^(3)-10^(4)GeV,while space-and ground-based interferometers to those with mass∼10^(7)-10^(12)GeV,leading to essential comple-ments to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves Silk damping new physics

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time-Varying Formation tracking Control of heterogeneous Multi-Agent Systems With Intermittent Communications and Directed Switching Networks

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 294-296页

作者： Yuhan wang Zhuping wang hao Zhang huaicheng Yan the Shanghai Research Institute for Intelligent Autonomous Systems Tongji University the National Key Laboratory of Autonomous Intelligent Unmanned Systems the Frontiers Science Center for Intelligent Autonomous System of Ministry of Education the College of Electronic and Information Engineering the Department of Control Science and Engineering Tongji University the Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education the School of Information Science and Engineering East China University of Science and Technology

Dear Editor,this letter is concerned with the problem of time-varying formation tracking for heterogeneous multi-agent systems(MASs) under directed switching networks. For this purpose, our first step is to present so... 详细信息

关键词： Switches topology Observers Formation control Event detection Switched systems Multi-agent systems Control theory Autonomous systems Stability

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A molecular dynamics simulation route towards Eu-doped multi-component transparent spectral conversion glass-ceramics

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Journal of Rare Earths 2025年第1期43卷 146-152,I0006页

作者： Xiuxia Xu Chenhao wang Di wang Wenyan Zheng Zhiyu Liu Jincheng Du Xusheng Qiao Xianping Fan Zhiyu wang Guodong Qian State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou310027China State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China Department of Materials Science and Engineering University of North TexasDentonTX76203-5017USA

Eu^(2+)doped fluorosilicate glass-ceramics containing BaF_(2) nanocrystals have high potential as spectral conversion materials for organic solar ***,it is difficult to realize the efficient design of BaF_(2):Eu^(2+)doped fluorosilicate glass and to vividly observe the glass microstructure in experiment through traditional trial-and-error glass preparation ***_(2):Eu^(2+)doped fluorosilicate glassceramics with high transparency,and high photoluminescence(PL)performance were predicted,designed and prepared via molecular dynamics(MD)simulation *** MD simulation prediction,self-organized nanocrystallization was realized to inhibit the abnormal growth of nanocrystals due to[AlO_(4)]tetrahedra formed in the fluoride-oxide *** introduction of NaF reduces the effective phonon energy of the glass because Na+will prompt Al^(3+)to migrate from the fluoride phase to the silicate phase and *** local environment of Eu^(2+)is optimized by predicting the doping concentration of EuF_(3) and 2 mol%EuF3 is the best concentration in this ***-ceramics sample GC2Eu as spectral conversion layer was successfully applied on organic solar cells to obtain more available visible phonons with a high photoelectric conversion efficiency(PCE).this work confirms the guidance of molecular dynamics simulation methods for fluorosilicate glasses design.

关键词： Molecular dynamics simulation Fluorosilicateglass Spectral conversion Organic solarcell Rareearths

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