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Epidermal microorganisms contributed to the toxic mechanism of nZVI and TCEP in earthworms by robbing metal elements and nutrients

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Eco-Environment & Health 2024年第1期3卷 80-88页

作者： Jie Hou Meirui yang Xinyue Wu Qiqi Chen Yuqi Lu Jianying Zhang Daohui Lin Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Department of Environmental ScienceZhejiang UniversityHangzhou 310058China Zhejiang Ecological Civilization Academy Anji 313300China National Demonstration Center for Experimental Environment and Resources Education(Zhejiang University) Hangzhou 310058China

Disrupting effects of pollutants on symbiotic microbiota have been regarded as an important mechanism of host toxicity,with most current research focusing on the intestinal *** fact,the epidermal microbiota,which participates in the nutrient exchange between hosts and environments,could play a crucial role in host toxicity via community *** compare the contributions of intestinal and epidermal symbiotic microorganisms to host toxicity,this study designed single and combined scenarios of soil contamination[nano zerovalent iron(nZVI)and tris(2-chloroethyl)phosphate(TCEP)],and revealed the coupling mechanisms between intestinal/epidermal symbiotic bacterial communities and earthworm toxicological *** analysis showed that 15%of intestinal microbes were highly correlated with host endpoints,compared to 45%of epidermal microbes showing a similar *** comparisons revealed that key species on the epidermis were mainly heterotrophic microbes with genetic abilities to utilize metal elements and carbohydrate *** verifications demonstrated that when facing the co-contamination of nZVI and TCEP,certain symbiotic microorganisms became dominant and consumed zinc,copper,and manganese along with saccharides and amino acids,which may be responsible for the nutritional deficiencies in the host *** findings can enrich the understanding of the coupling relationship between symbiotic microorganisms and host toxicity,highlighting the importance of epidermal microorganisms in host resistance to environmental pollution.

关键词： Microbial community Host Soil pollution Joint toxicity Heterotrophic function

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Predicting Bioaccumulation of Nanomaterials:Modeling Approaches with Challenges

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Environment & Health 2024年第4期2卷 189-201页

作者： Hang Zeng Zhuoyan Lv Xiaoyan Sun yang Tong Wei Wu Shipeng Dong Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentChemistry and Biomedicine Innovation CenterNanjing UniversityNanjing 210023China Nanjing Qixia District Hospital Nanjing 210023China High Tech Research and Development Center Ministry of Science and TechnologyBeijing 100044China

Understanding the bioaccumulation of nanomaterials(NMs)by organisms is essential in evaluating their potential ***,the experimental determination of bioaccumulation is substantially challenging,which spawned the development of prediction approaches via establishing models for various *** modeling approaches,such as the biotic ligand model(BLM),partition coefficients,accumulation factor models,and quantitative structure−activity relationship(QSAR)models,were initially used in the application of NMs,aiming to provide a reliable quantitative dose in a resource-saving *** methods,which are based on the uptake patterns of substances,probably lead to deviated results due to the different uptake behaviors of *** this study,currently developed models to evaluate the bioaccumulation of NMs are critically reviewed,with their feasibilities and limitations being *** addition,the recently developed machine learning amended models have taken great efforts in realizing biological behaviors of NMs in organisms by providing in silico *** this data-driven approach has limitations in mechanism exploration,it may give different insights into the bioaccumulation model establishment and critical feature identification.

关键词： Modeling Forecast Bioaccumulation Nanomaterials Machine learning

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基于超分辨率重建与机器学习的油菜苗情监测方法

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农业机械学报 2024年第6期55卷 196-201页

作者：杨扬刘洋苏宸赵杰张强强周广生华中农业大学工学院武汉430070 华中农业大学植物科学技术学院武汉430070 安徽农业大学农学院合肥230036

为优化养分管理和确保植株正常生长,以无人机遥感技术高效且非破坏采集田间作物苗情信息,监测油菜苗期的叶面积指数(LAI)与叶绿素相对含量(SPAD)。针对无人机因飞行高度与图像分辨率相互制约,监测效率与监测精度难以兼顾的问题,采用超... 详细信息

为优化养分管理和确保植株正常生长,以无人机遥感技术高效且非破坏采集田间作物苗情信息,监测油菜苗期的叶面积指数(LAI)与叶绿素相对含量(SPAD)。针对无人机因飞行高度与图像分辨率相互制约,监测效率与监测精度难以兼顾的问题,采用超分辨率重建方法,融合较低飞行高度拍摄高分辨率影像,重建较高飞行高度拍摄影像,建模完成后可通过拍摄飞行影像监测LAI和SPAD。试验设置3个氮肥梯度、3个播期、3个种植密度处理,在苗期利用无人机分别采集20m及40m 2个飞行高度的油菜苗影像,采用SRRestnet方法,对40m影像进行超分辨率重建。基于20m、40m及40m重建影像中提取的3种特征组合,利用偏最小二乘回归(PLSR)、随机森林(RF)、支持向量回归(SVR)3种机器学习方法对LAI和SPAD进行监测。结果表明,超分辨率重建后的图像在表型苗情监测中表现出良好效果,PLSR监测LAI、RF监测SPAD的监测精度最高,且40m重建图像的作业效率相比于20m图像提高48.6%。

关键词：油菜苗情监测叶面积指数叶绿素相对含量超分辨率重建机器学习

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Roles of concentration-dependent Cu doping behaviors on the thermoelectric properties of n-type Mg_(3)Sb_(1.5)Bi_(0.5)

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Journal of Materiomics 2024年第1期10卷 154-162页

作者： Xinxin yang Heng Ni Xiaotong Yu Biao Cao Juanjuan Xing Qiyong Chen Lili Xi Jiandang Liu Jiye Zhang Kai Guo Jing-Tai Zhao School of Materials Science and Engineering Shanghai University99 Shangda RoadShanghai200444China Materials Genome Institute Shanghai University99 Shangda RoadShanghai200444China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefeiAnhui230026China School of Physics and Materials Science Guangzhou UniversityGuangzhou510006China Research Center for Advanced Information Materials(CAIM) Huangpu Research&Graduate School of Guangzhou UniversitySino-Singapore Guangzhou Knowledge CityHuangpu DistrictGuangzhou510555China Key Lab of Si-based Information Materials&Devices and Integrated Circuits Design Department of Education of Guangdong ProvinceChina School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004China

Large Seebeck coefficients induced by high degeneracy of conduction band minimum,and low intrinsic lattice thermal conductivity originated from large lattice vibrational anharmonicity render Mg_(3)Sb_(2)as a promising n-type thermoelectric ***,we demonstrated unique concentration-dependent occupation behaviors of Cu in Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)matrix,evidenced by structural characterization and transport property *** is found that Cu atoms prefer to enter the interstitial lattice sites in Mg_(3)Sb_(2)host with low doping level(Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+x%Cu,x<0.3%),acting as donors for providing additional electrons without deteriorating the carrier *** x is larger than 0.3%,the excessive Cu atoms are inclined to substitute Mg atoms,yielding acceptors to decrease the electron *** a result,the electrical conductivity of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample reaches 2.3×10^(4)S/m at 300 K,increasing by 300%compared with that of the pristine *** figure of merit zT values in the whole measured temperature range are significantly improved by the synergetic improvement of power factor and reduction of thermal *** average zT∼1.07 from 323 K to 773 K has been achieved for the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample,which is about 30%higher than that of the Mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01) sample.

关键词： Mg_(3)Sb_(2) Cu doping Concentration-dependent occupation Thermoelectric properties Average zT

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Arlenea delicata *** ***.,a new ephedroid plant from the Early Cretaceous Crato Formation,Araripe Basin,Northeast Brazil

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Plant Diversity 2024年第3期46卷 362-371页

作者： Alita Maria Neves Ribeiro Yong yang Antonio Alamo Feitosa Saraiva Renan Alfredo Machado Bantim Joao Tavares Calixto Junior Flaviana Jorge de Lima Programa de Pos-Graduaçao em Diversidade Biologica e Recursos Naturais Universidade Regional do CaririRua Carolino SucupiraPimenta63105-160CratoCearaBrazil Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the Environment159 Longpan RoadNanjing Forestry UniversityNanjing210037China Laboratorio de Paleontologia Universidade Regional do CaririRua Carolino SucupiraPimenta63105-160CratoCearaBrazil Laboratorio de Estudos da Flora Regional Universidade Regional do CaririRua Carolino SucupiraPimenta63105-160CratoCearaBrazil Gondwanan Plants Lab Universidade Federal de PernambucoCentro Academico de VitoriaRua Do Alto Reservatorio S/nBela Vista55608-680Vitoria de Santo AntaoPernambucoBrazil Programa de Pos-Graduaçao em Geociencias(PPGEOC) Universidade Federal de Pernambuco(UFPE)Rua Av.da ArquiteturaS/n°CEP-50740-550Cidade UniversitariaRecifePernambucoBrazil

Ephedroid macrofossils have been widely documented in Cretaceous deposits,including numerous from the Lower Cretaceous Yixian Formation of NE ***,few ephedroid macrofossils have been reported from South ***,we describe a new plant of the family Ephedraceae,Arlenea delicata *** ***.,from the Lower Cretaceous Crato Formation of the Araripe Basin,Northeast Brazil,based on the vegetative and reproductive *** has the typical morphological characteristics of ephedroid plants,including fertile reproductive branches,opposite phyllotaxy,terminal female cones,a sympodial branching system,longitudinally striated internodes,and swollen *** new finding is unusual in having inner chlamydosperms subtended by two pairs of bracts,reproductive units connected to branches through swollen receptacles and a smooth seed *** new ephedroid taxon from the Crato Formation increases our understanding of plant diversity of this group during the Early ***,the general morphology(fleshy bracts and enlarged receptacles)of this new fossil discovery indicates that seeds of this plant may have been dispersed by animals such as pterosaurs(mainly the Tapejaridae)and birds(Enantiornithes and Ornituromorpha).If true,this would explain the cosmopolitan distribution of Ephedraceae in the Lower Cretaceous.

关键词： Early Cretaceous Gnetophytes Arlenea delicata Ephedrales Crato Formation

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Simultaneously improving ROP and maintaining wellbore stability in shale gas well:A case study of Luzhou shale gas reservoirs

Rock Mechanics Bulletin

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Rock Mechanics Bulletin 2024年第3期3卷 91-103页

作者： Yaoran Wei Yongcun Feng Zhenlai Tan Tianyu yang Shuang Yan Xiaorong Li Jingen Deng National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing102249China College of Petroleum Engineering China University of PetroleumBeijing102249China College of Safety and Ocean Engineering China University of PetroleumBeijing102249China

The ROP(rate of penetration)within the horizontal section of shale gas wells in the Luzhou oil field is low,seriously delaying the exploration and development *** is proved that reducing mud density mitigates the bottom-hole differential pressure(ΔP)and increases the ROP during overbalanced ***,wellbore collapse may occur when wellbore pressure is excessively *** is urgent to ascertain the optimal equilibrium point between improving ROP and maintaining wellbore *** safe mud weight window and the lower limit of mud density in the horizontal section of the Luzhou block are predicted using the piecewise fitting method based on conventional logging ***,the accuracy of the collapse pressure prediction was verified using the distinct element method(DEM),and the effect of wellbore pressure,in-situ stress,rock cohesion,and natural fracture density on borehole collapse was ***,a fitting model ofΔP and ROP of the horizontal section in the Luzhou block is established to predict ROP promotion potential after mud density *** field application of this approach,demonstrated in 8 horizontal wells in the Luzhou block,effectively validates the efficiency of reducing mud density for ROP *** study provides a useful method for simultaneously improving ROP and maintaining wellbore stability and offers significant insights for petroleum engineers in the design of drilling parameters.

关键词： Shale gas reservoirs ROP improvement Wellbore stability ROP promotion potential DEM

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The current role of dendritic cells in the progression and treatment of colorectal cancer

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Cancer Biology & Medicine 2024年第9期21卷 769-783页

作者： Yuanci Zhang Songtao Ji Ge Miao Shuya Du Haojia Wang Xiaohua yang Ang Li Yuanyuan Lu Xin Wang Xiaodi Zhao State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers National Clinical Research Center for Digestive Diseases Xijing Hospital Fourth Military Medical University Department of Gastroenterology Tangdu Hospital Fourth Military Medical University Department of Experimental Surgery Xijing Hospital Fourth Military Medical University Department of Gastroenterology the 988th Hospital of PLA Joint Logistics Support Force

Colorectal cancer(CRC) is the third most common cancer and the second leading cause of cancer-related deaths worldwide. Dendritic cells(DCs) constitute a heterogeneous group of antigen-presenting cells that are important for initiating and regulating both innate and adaptive immune responses. As a crucial component of the immune system, DCs have a pivotal role in the pathogenesis and clinical treatment of CRC. DCs cross-present tumor-related antigens to activate T cells and trigger an antitumor immune response. However, the antitumor immune function of DCs is impaired and immune tolerance is promoted due to the presence of the tumor microenvironment. This review systematically elucidates the specific characteristics and functions of different DC subsets, as well as the role that DCs play in the immune response and tolerance within the CRC microenvironment. Moreover, how DCs contribute to the progression of CRC and potential therapies to enhance antitumor immunity on the basis of existing data are also discussed, which will provide new perspectives and approaches for immunotherapy in patients with CRC.

关键词： Colorectal cancer dendritic cells treatment strategies tumor progression

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Synthesis of size-controlled and dispersible Sm2Fe17N3 magnetic particles by reduction diffusion process using molten salt

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Journal of Rare Earths 2024年第11期42卷 2105-2111页

作者： Junhua Xi Zhi yang Muhammad Haseeb Yuanyuan Chen Xiaofeng Nie Liying Cong Qiong Wu Enfeng Fu Hongguo Zhang Weiqiang Liu Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of Technology

The synthesis of size-controlled Sm2Fe17magnetic particles is a prerequisite for the fabrication of highperformance Sm2Fe17N3permanent magnetic ***,Sm2Fe17was synthesized using a costeffective reduction-diffusion *** calcium chloride molten salt was introduced to control the particle size and achieve a single phase of *** effects of reduction-diffusion reaction temperature and the amount of added calcium chloride on the phase constitution and microstructure of the final product of reduction-diffusion were systematically *** an appropriate amount of calcium chloride can effectively inhibit the overgrowth and sintering of the reduced *** employing the strategy of adding 20 wt% of calcium chlorides into the green compacts,we were able to successfully synthesize uniform Sm2Fe17particles that are well-dispersed,with an average size of 2.2 μ***,by combining the optimal reduction-diffusion conditions and the nitriding process,the hard magnetic Sm2Fe17N3material was successfully *** study could be useful for the development of high-performance Sm2Fe17N3magnetic materials utilizing reduction-diffusion technology.

关键词： Molten salt Permanent magnets Rare earths Reduction-diffusion Sm2Fe17N3

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Near-infrared organic lasers with ultra-broad emission bands by simultaneously harnessing four-level and six-level systems

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Chinese Chemical Letters 2024年第8期35卷 288-293页

作者： Lei Wang Jun-Jie Wu Chang-Cun Yan Wan-Ying yang Zong-Lu Che Xin-Yu Xia Xue-Dong Wang Liang-Sheng Liao Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou 215123China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao SAR 999078China

Organic lasers with broad emission bands in near-infrared(NIR)region are crucial for their applications in laser communication,night-vision as well as bioimaging owing to the abundance of selectable lasing ***,for most organic gain materials,gain regions are limited in a small wavelength range because of the fixed energy level ***,we design a strategy to realize NIR organic lasers with broad emission bands based on tunable energy level systems induced by cascaded excited-state intramolecular proton transfer(ESIPT).A novel gain material named DHNN was developed,which can undergo a cascaded double-ESIPT process supporting four-level and six-level systems *** doping DHNN into polystyrene microspheres,NIR lasers with tunable emission bands can be achieved based on the careful modulation of ***,organic lasers with an ultra-broad emission band ranging from 700 nm to 900 nm was successfully achieved by harnessing four-level and six-level systems simultaneously.

关键词： Excited-state intramolecular proton transfer Organic solid-state laser Wide gain interval Near-infrared emission Molecular design

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铜阳极泥中有价元素湿法回收工艺研究进展

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中国有色金属学报 2024年第7期34卷 2399-2418页

作者：杨关奖杨阳王雪宋健斐朱廷钰徐文青中国石油大学(北京)机械与储运工程学院北京102249 中国科学院过程工程研究所北京100190

我国铜生产量居世界第一,其中80%采用火法冶炼工艺。冶炼过程中产生的铜阳极泥富含Cu、Ag、Au、Se、Te等多种有价元素,具有很高的回收价值。本文分析对比了铜阳极泥的主流处理工艺,其中,湿法工艺作为一种低能耗高效浸出工艺,近些年被广... 详细信息

我国铜生产量居世界第一,其中80%采用火法冶炼工艺。冶炼过程中产生的铜阳极泥富含Cu、Ag、Au、Se、Te等多种有价元素,具有很高的回收价值。本文分析对比了铜阳极泥的主流处理工艺,其中,湿法工艺作为一种低能耗高效浸出工艺,近些年被广泛地研究。文章系统综述了铜阳极泥湿法处理工艺研究进展,归纳了铜阳极泥氧化浸出、物理强化浸出等预处理方法,总结了铜阳极泥中Cu、Se、Te以及贵金属Ag、Au的回收方法及反应机理。基于当前的研究进展,未来应重点关注湿法工艺的绿色性,开发用于浸出、配合、萃取等过程的绿色试剂,并加强对阳极泥中稀贵金属(Pt、Pd、Rh等)回收的研究,同时需要提升不同元素选择性分离的能力,以获得高纯度产品。

关键词：阳极泥湿法工艺氧化浸出选择性分离

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