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Health implications of engineered nanoparticles in infants and children

World Journal of Pediatrics 2015年第3期11卷 197-206页

作者： Song Tang mao Wang Kaylyn E Germ Hua-mao du Wen-Jie Sun Wei-Min Gao Gregory d Mayer The Institute of Environmental and Human Health Texas Tech UniversityLubbockTexas 79416USA School of Environment and Sustainability University of SaskatchewanSaskatoonSaskatchewan S7N 5B3Canada department of Preventive Medicine School of Public HealthSun Yat-sen UniversityGuangzhou 510080China College of Biotechnology Southwest UniversityBeibeiChongqing 400715China School of Food Science Guangdong Pharmaceutical UniversityZhongshan 528458China department of Global Health and Environmental Sciences School of Public Health and Tropical MedicineTulane UniversityNew OrleansLouisiana 70112USA

Background:The nanotechnology boom and the ability to manufacture novel nanomaterials have led to increased production and use of engineered nanoparticles(ENPs).However,the increased use of various ENPs inevitably results in their release in or the contamination of the environment,which poses significant threats to human *** recent years,extraordinary economic and societal benefits of nanoproducts as well as their potential risks have been observed and widely *** estimate whether ENPs are safe from the onset of their manufacturing to their disposal,evaluation of the toxicological effects of ENPs on human exposure,especially on more sensitive and vulnerable sectors of the population(infants and children)is *** sources:Papers were obtained from PubMed,Web of Science,and Google *** search words included:"nanoparticles","infants","children","exposure","toxicity",and all relevant ***:A brief overview was conducted to 1)characterize potential exposure routes of ENPs for infants and children;2)describe the vulnerability and particular needs of infants and children about ENPs exposure;3)investigate the current knowledge about the potential health hazards of ENPs;and 4)provide suggestions for future research and regulations in ENP ***:As the manufacturing and use of ENPs become more widespread,directed and focused studies are necessary to measure actual exposure levels and to determine adverse health consequences in infants and children.

关键词： developmental effects human exposure maternal-fetal transmission nanopediatrics nanotoxicity

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deciphering fungal metabolon coupling tandem inverse-electrondemand diels-Alder reaction and semipinacol rearrangement for the biosynthesis of spiro polycyclic alkaloids

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Science China Chemistry 2025年第01期 288-296页

作者： Shuai Liu Wen-Qiang Xu Ying-Tong di Man-Cheng Tang ding-Kang Chen Ming-Ming Cao Yao-Wen Chang Hong-Yu Tang Chun-mao Yuan Jun-Bo Yang Zhi-Li Zuo Han Guo Zi-Fei Xu Ying Zeng Yun-dong Wu Xiao-Jiang Hao Key Laboratory of Phytochemistry and Natural Medicines (Chinese Academy of Sciences) Kunming Institute of Botany Chinese Academy of Sciences University of Chinese Academy of Sciences Lab of Computational Chemistry and drug design State Key Laboratory of Chemical Oncogenomics Peking University Shenzhen Graduate School Shenzhen Bay Laboratory State Key Laboratory of Microbial Metabolism School of Life Sciences & Biotechnology Shanghai Jiao Tong University State Key Laboratory of Functions and Applications of Medicinal Plants Guizhou Medical University Molecular Biology Experimental Center Germplasm Bank of Wild Species in Southwest China Kunming Institute of Botany Chinese Academy of Sciences Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of Botany Chinese Academy of Sciences Research Unit of Chemical Biology of Natural Anti-Virus Products Chinese Academy of Medical Sciences

In the intricate process of natural product biosynthesis, a metabolon can enhance metabolic flux by associating sequential enzymes. A fungal metabolon, comprising of flavin-dependent monooxygenase Spe F and P450 monooxygenase Spe G, is identified in the biosynthesis of spiro polycyclic alkaloids(+)-notoamide B and its diastereomer(+)-versicolamide B. Using notoamide E as a substance, Spe F/Spe G metabolon can control the stereoselectivity of its 2,3-epoxidation, followed by hydrogen atom ion at C-17 to generate reactive epoxide tau-m A with dienyl iminium unit. Subsequently,(+)-notoamide B and(+)-versicolamide B are produced via tandem nonenzymatic inverse-electron-demand diels-Alder reaction and semipinacol rearrangement. This provides the first example of metabolon in the biosynthesis of spiro-prenylated indole alkaloids.

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RFId-based 3d human pose tracking: A subject generalization approach

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digital Communications and Networks 2022年第3期8卷 278-288页

作者： Chao Yang Xuyu Wang Shiwen mao dept.of Electrical and Computer Engineering Auburn UniversityAuburnAL36849-5201USA dept.of Computer Science California State UniversitySacramentoCA95819-6021USA

Three-dimensional (3d) human pose tracking has recently attracted more and more attention in the computer vision field. Real-time pose tracking is highly useful in various domains such as video surveillance, somatosensory games, and human-computer interaction. However, vision-based pose tracking techniques usually raise privacy concerns, making human pose tracking without vision data usage an important problem. Thus, we propose using Radio Frequency Identification (RFId) as a pose tracking technique via a low-cost wearable sensing device. Although our prior work illustrated how deep learning could transfer RFId data into real-time human poses, generalization for different subjects remains challenging. This paper proposes a subject-adaptive technique to address this generalization problem. In the proposed system, termed Cycle-Pose, we leverage a cross-skeleton learning structure to improve the adaptability of the deep learning model to different human skeletons. Moreover, our novel cycle kinematic network is proposed for unpaired RFId and labeled pose data from different subjects. The Cycle-Pose system is implemented and evaluated by comparing its prototype with a traditional RFId pose tracking system. The experimental results demonstrate that Cycle-Pose can achieve lower estimation error and better subject generalization than the traditional system.

关键词： Radio-frequency identification(RFId) Three-dimensional(3d)human pose tracking Cycle-consistent adversarial network Generalization

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Environmental Analysis with 2d Transition-Metal dichalcogenide-Based Field-Effect Transistors

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Nano-Micro Letters 2020年第8期12卷 1-24页

作者： Xiaoyan Chen Chengbin Liu Shun mao Biomedical Multidisciplinary Innovation Research Institute Shanghai East HospitalState Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China department of Materials Science and Engineering Johns Hopkins University3400 N.Charles St.BaltimoreUSA

Field-effect transistors(FETs)present highly sensitive,rapid,and in situ detection capability in chemical and biological ***,two-dimensional(2d)transition-metal dichalcogenides(TMdCs)attract significant attention as FET channel due to their unique structures and outstanding *** the booming of studies on TMdC FETs,we aim to give a timely review on TMdCbased FET sensors for environmental analysis in different ***,theoretical basics on TMdC and FET sensor are ***,recent advances of TMdC FET sensor for pollutant detection in gaseous and aqueous media are,respectively,*** last,future perspectives and challenges in practical application and commercialization are given for TMdC FET *** article provides an overview on TMdC sensors for a wide variety of analytes with an emphasize on the increasing demand of advanced sensing technologies in environmental analysis.

关键词： Environmental analysis Two-dimensional transition-metal dichalcogenide Field-effect transistor Gas sensor Biosensor

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Shedding light on the role of interfacial chemical bond in heterojunction photocatalysis

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Nano Research 2022年第12期15卷 10158-10170页

作者： Yueshuang mao Pengfei Wang Sihui Zhan MOE Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin300350China Tianjin Key Lab Clean Energy&Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China

Faced with the growing consumption of fossil fuels and the consequent energy/ecological crisis,photocatalysis has become a realistic option to develop new energy source and realize the carbon *** photocatalysts constructed by multiple semiconductors with staggered band structure can spatially separate redox reaction sites to realize synergistic oxidation and reduction reactions,and have captured broad ***,the undesigned heterojunctions still encounter some headache difficulties,that is the poor interfacial contact,which will block carrier mobility,thus result in inefficient and instable ***,researchers have been focusing on constructing chemical bonds(especially covalent bonding)between different semiconductors to induce the formation of intimate and stable interface ***,this review article presents the state-of-the-art progress on interfacial chemical bonds(ICB)in heterojunction photocatalysts and clarifies the function mechanism for enhancing *** that the formation of ICB strongly depends on the surface characteristics of semiconductors,we clarify the formation mechanism and put forward rational design *** importantly,the current photocatalytic applications of ICB are reviewed to have a deep understanding of structure-activity related ***,our brief outlooks on the current challenges and future development trends of ICB for next-generation photocatalysts are pointed out to create brand-new strategies for optimizing photocatalytic properties and accelerate the practical applications of ICB with high-performance.

关键词： photocatalysis heterojunction interfacial chemical bond structure-activity relationships charge transfer

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Single-source-precursor synthesis of porous W-containing SiC-based nanocomposites as hydrogen evolution reaction electrocatalysts

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Journal of Advanced Ceramics 2021年第6期10卷 1338-1349页

作者： Zhaoju YU Kangwei mao Yao FENG College of Materials Key Laboratory of High Performance Ceramic Fibers(Xiamen University)Ministry of EducationXiamen 361005China Technische Universitat darmstadt Institut fur MaterialwissenschaftOtto-Berndt-Strafie 3D-64287DarmstadtGermany College of Materials Science and Engineering Changsha University of Science&TechnologyChangsha 410114China

In this paper,W-containing SiC-based ceramic nanocomposites were successfully prepared by a polymer-derived ceramic approach using allylhydridopolycarbosilane(AHPCS)as a SiC source,WC16 as a tungsten source,polystyrene(PS)as a pore forming agent as well as divinyl benzene(dVB)as a carbon rich ***-temperature phase behavior of the W-containing SiC-based ceramics after heat treatment was studied,showing that excessive dVB content in the feed will inhibit the crystallinity of W-containing nanoparticles in the final ceramic *** high specific surface area(SSA)of 169.4-276.9 m^(2)/g can be maintained even at high temperature in the range of 1400-1500℃,due to the carbothermal reaction which usually occurs between 1300 and 1400℃.All prepared W-containing SiC-based nanocomposites reveal electrocatalytic activity for the hydrogen evolution reaction(HER).In detail,compared with reversible hydrogen electrode(RHE),the ceramic sample PWA-2-1300 after heat treatment at 1300℃ has the smallest overpotential of 286 mV when the current density is 10 mA·cm^(-2) in acid medium,indicating the promising perspective in the water splitting field.

关键词： single-source-precursor W-containing phase SiC-based nanocomposites electrocatalyst hydrogen evolution reaction

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Effects of Coupling distance on Synchronization and Coherence in Chaotic Neural Networks

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Communications in Theoretical Physics 2009年第7期52卷 81-84页

作者： WANG mao-Sheng department of Physics Anhui Normal University Wuhu 241000 China

Effects of coupling distance on synchronization and coherence of chaotic neurons in complex networks arenumerically *** find that it is not beneficial to neurons synchronization if confining the coupling distanceof random edges to a limit d_(max),but help to improve their ***,there is an optimal value of d_(max) atwhich the coherence is maximum.

关键词： synchronization coherence resonance neural network

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A Global Torelli Theorem for Certain Calabi-Yau Threefolds

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Communications in Mathematics and Statistics 2024年第1期12卷 91-112页

作者： mao Sheng Jinxing Xu School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026People’s Republic of China

We establish a global Torelli theorem for the complete family of Calabi-Yau threefolds arising from cyclic triple covers of P^(3)branched along six stable hyperplanes.

关键词： Global Torelli theorem Calabi-Yau threefolds Hyperplane arrangements

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Seasonal abundance and distribution of pelagic tunicates (Chordata: Thaliacea) in the central South China Sea

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Acta Oceanologica Sinica 2006年第3期25卷 148-156页

作者： LIN mao LIN Rongcheng Open Laboratory of Environment Science Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China Key Laboratory of Marine Biogenetic Resource Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

A total of 168 macro-zooplankton samples from 42 stations in the central South China Sea （12° ～20° N, 111°～118°E, an area of about 64 × 10^4 km^2 ） were collected in September 1983 （autumn） , April 1984 （spring） , August 1984 （summer） and december 1984 （winter）. Twenty-three species and subspecies of tunicates were found, of which Thalia democratica complex （including T. d. orientalis and T. d. echinata） and doliolum denticulatum were the dominant species, and accounted for 95.7% , 90. 0%, 91.8% and 90. 5% of the total tunicates found in autumn, winter, spring and summer, respectively. The highest abundance （with a mean of 2.37 ind./m^3 ） occurred in autumn. There are strong correlations between the abundances of the tunicates and those of phytoplankton and chlorophyll a concentration. However, tunicates also aggregate in areas with low primary production in the autumn survey, probably due to the water circulation pattern.

关键词： South China Sea tunicates abundance and distribution

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Heavy metal phytoextraction by Sedum alfredii is affected by continual clipping and phosphorus fertilization amendment

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Journal of Environmental Sciences 2012年第3期24卷 376-386页

作者： Huagang Huang Tingqiang Li d.K.Gupta Zhenli He Xiao-e Yang Bingnan Ni mao Li Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health Zhejiang UniversityHangzhou 310029China departamento de Bioquimica Biologia Cellular y Molicular de PlantasEstacion Experimental del ZaidinCSICC/Profesor Albareda No 1E-180080GranadaSpain University of Florida Institute of Food and Agricultural SciencesIndian River Research and Education CenterFort PierceFlorida 34945USA

Improving the efficacy of phytoextraction is critical for its successful application in metal contaminated soils. Mineral nutrition affects plant growth and metal absorption and subsequently the accumulation of heavy metal through hyper-accumulator plants. This study assessed the effects of di-hydrogen phosphates （KH2PO4, Ca（H2PO4）2, NaH2PO4 and NH4H2PO4） application at three levels （22, 88 and 352 mg P/kg soil） on Sedum alfredii growth and metal uptake by three consecutive harvests on aged and Zn/Cd combined contaminated paddy soil. The addition of phosphates （P） significantly increased the amount of Zn taken up by S. alfredii due to increased shoot Zn concentration and dry matter yield （dMY）（P 〈 0.05）. The highest phytoextraction of Zn and Cd was observed in KH2PO4 and NH4H2PO4 treatment at 352 mg P/kg soil. The amount of Zn removed by phytoextraction increased in the order of 1st clipping 〈 2nd clipping 〈 3rd clipping, and for Cd extraction the order was 2nd clipping 〈 1st clipping 〈 3rd clipping. These results indicate that the application of P fertilizers coupled with multiple cuttings can enhance the removal of Zn and Cd from contaminated soils by S. alfredii, thus shortening the time needed for accomplishing remediation goals.

关键词： soluble phosphates clipping phytoremediation heavy metal Sedum alfredii

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