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The Need for Biosecurity Education in Biotechnology Curricula

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BioDesign Research 2023年第1期5卷 58-61页

作者： Ying-Chiang J.Lee xuanqi chen Siddharth Marwaha Department of Molecular Biology Princeton UniversityPrincetonNJ 08544USA. Department of Chemical and Biological Engineering Princeton UniversityPrincetonNJ08544USA.

The growth of biotechnology in recent decades and the dual-use nature of most bioscience research are making their misuse,or accidental misuse or release,more likely and present as threats to biosecurity.A proactive approach is through educating the next generation of scientists to be more security ***,current educational and professional programs in biosecurity are *** this perspective,we recommend that biosecurity educational opportunities should be implemented and expanded for undergraduate and graduate students who will likely use one or more methods in the field of *** then propose that biosecurity education is a key factor in a path toward sustainable and safe ***,a set of 17 biosecurity competencies organized into 6 distinct themes is outlined.

关键词： likely expanded education

Customization of FeNi alloy nanosheet arrays inserted with biomass-derived carbon templates for boosted electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 812-824页

作者： xuanqi Yang Honghan Wang Jing chen Qingda An Zuoyi Xiao Jingai Hao Shangru Zhai Junye Sheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China Qingdao Medical College Qingdao UniversityQingdao 266071China

Electromagnetic wave(EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human ***,obtaining lightweight,high-performance,and broadband EMW-absorbing material remains an overwhelming *** dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing *** layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses,low costs,abundant resources,and light ***,FeNi alloy nanosheet array/Lycopodium spore-derived carbon(FeNi/LSC)was prepared through a simple hydrothermal and carbonization ***/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array,sponge-like structure,capability for impedance matching,and improved dielectric/magnetic *** expected,FeNi/LSC exhibited the minimum reflection loss of-58.3 dB at 1.5 mm with 20wt%filler content and a widely effective absorption bandwidth of 4.92 ***/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.

关键词： spore-derived carbon FeNi alloy nanosheet array multi-interface heterostructures synergistic effect efficient electromagnet-ic wave absorption

A double-layered liquid metal-based electrochemical sensing system on fabric as a wearable detector for glucose in sweat

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Microsystems & Nanoengineering 2022年第3期8卷 129-140页

作者： xuanqi chen Hao Wan Rui Guo Xinpeng Wang Yang Wang Caicai Jiao Kang Sun Liang Hu School of Biological Science and Medical Engineering Being Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191China Biosensor National Special Laboratory Key Laboratory for Bipmedical Engineering of Ministry of EducationDepartment of Biomedical EngineeringZhejiang UniversityHangzhou 310027China Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing China

Integrated electrochemical sensing plaforms in wearable devices have great prospects in biomedical ***,traditional electrochemical platforms are generally fabricated on airtight printed circuit boards,which lack sufficient flexibility,air permeability,and *** metals at room temperature with excellent mobility and electrical conductivity show high promise in flexible *** paper presents a miniaturized liquid metal-based flexible electrochemical detection system on fabric,which is intrinsically flexible,air-permeable,and conformable to the *** advantage of the excellent fluidity and electrical connectivity of liquid metal,a double-layer circuit is fabricated that significantly miniaturizes the size of the whole *** linear response,time stability,and repeatability of this system are verifed by resistance,stability,image characterization,and potassium ferricyanide ***,glucose in sweat can be detected at the millimolar level using this sensing system,which demonstrates its great potential for wearable and portable detection in biomedical fields,such as health monitoring and point-of-care testing.

关键词： wear electrochemical system

Profile of Dr. Songlin chen

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Science China Life Sciences 2024年第10期67卷 2062-2063页

作者： chen, Songlin Yellow Sea Fisheries Res Inst Qingdao Peoples R China

For decades, Dr. chen has been engaged in fish germplasm preservation, sex control and research focusing on molecular breeding for disease resistance. He discovered the first sex-specific molecular marker of fish(chen et al., 2007),deciphered the first fish genome(Chinese tongue sole) in China, revealed the sex determination mechanism in fish(chen et al., 2014), and created molecular sex control technology. He also discovered the molecular mechanism of metamorphosis in flatfish(Shao et al., 2017) and developed China's first fish disease-resistant breeding gene chip, “YUXIN No.1”.

关键词： TURBOT SCOPHTHALMUS-MAXIMUS GENOMIC SELECTION JAPANESE FLOUNDER SEX-CHROMOSOME CELL-LINE CRYOPRESERVATION EVOLUTION EMBRYOS

Effect of Reclamation on the Groundwater-Lake Water Interaction in chen Lake

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Journal of Earth Science 2024年第3期35卷 1083-1086页

作者： Kun Lei Teng Ma Liuzhu chen Zhenxing Li Yu chen School of Environmental Studies State Key Laboratory of Biogeology and Environmental GeologyChina University of GeosciencesWuhan 430078China

0 INTRODUCTION To relieve the short supply of suitable land for residing,cultivating,and commerce,it is accepted to reclaim land from lakes,river estuaries,and coastal regions in many countries(Mancini et al.,2020).The large-scale reclamation activities have an irreversible effect on the mico-geomorphology and hydrodynamic system of seasonally flooded areas(Zhang et al.,2019;Yu et al.,2018).For example,coastal regions reclaimed extended the groundwater flow paths,as well as created groundwater level rise,resulting in water-logging in the reclaimed area(Hu et al.,2008).Similar changes in groundwater flow systems may alter groundwater-lake water interactions,and it can ultimately affect the water cycle in the lake ***,such detailed studies are presently *** addition,natural exchanges between the lake and groundwater systems can be strongly affected by physical hydrological processes(Javadzadeh et al.,2020),chemical properties(Kamtchueng et al.,2015),and bioto behavior(Hancock et al.,2005).

关键词： groundwater coastal logging

γ辐照作用下GFRP电绝缘性能及其微观结构机理研究

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材料导报 2020年第8期34卷 179-183页

作者：郑莉芳崔哲王兆中谢亚杰岳丽娜陈璇琪北京科技大学机械工程学院北京100083 北京科技大学材料科学与工程学院北京100083 华北科技学院环境工程学院北京101601

玻璃纤维增强塑料(GFRP)作为一种具有良好电绝缘性能、热绝缘性能和力学性能的复合材料,在高能物理和核物理实验中被用来制作支撑设备,而高能物理和核物理实验中往往会产生一定剂量的γ或中子辐照,进而改变GFRP的性能。为保证GFRP支撑... 详细信息

玻璃纤维增强塑料(GFRP)作为一种具有良好电绝缘性能、热绝缘性能和力学性能的复合材料,在高能物理和核物理实验中被用来制作支撑设备,而高能物理和核物理实验中往往会产生一定剂量的γ或中子辐照,进而改变GFRP的性能。为保证GFRP支撑设备在辐照条件下的安全运行,有必要对辐照前后GFRP的电绝缘性能进行研究。本研究通过导电性能测试仪、扫描电子显微镜、红外光谱和X射线光电子能谱研究了γ辐照前后GFRP电绝缘性能的变化规律,并从微观结构上揭示了引起材料电绝缘性能变迁的机理。结果表明:GFRP平均电阻率与辐照剂量之间具有明显的线性关系,在经20 kGy、100 kGy和200 kGy的γ辐照后,其平均电阻率由辐照前的8.16×10^12Ω·m分别提高到15.88×10^12Ω·m、23.13×10^12Ω·m和43.15×10^12Ω·m,辐照使GFRP的平均电阻率升高,电绝缘性增强。通过对GFRP微观结构进行研究,发现辐照后玻璃纤维表面出现裂纹,环氧树脂呈现碎片化趋势且有孔洞出现,二者之间的界面遭到破坏,分子键发生断裂,GFRP发生了氧化老化,这些均为GFRP电绝缘性能增强的重要原因。GFRP材料可以满足高能物理和核物理辐照环境下的高电绝缘性要求。

关键词：玻璃纤维增强塑料电绝缘性电阻率 γ辐照环氧树脂

Meridional deflection of global eddy propagation derived from tandem altimetry: Mechanism and implication

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Science China Earth Sciences 2024年第3期67卷 811-825页

作者： Ge chen Xiaoyan chen Frontiers Science Center for Deep Ocean Multispheres and Earth System School of Marine TechnologyOcean University of ChinaQindao 266100China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQindao 266237China

A common view on meridional deflection of eddy propagation is poleward for cyclones and equatorward for anticyclones. This widely accepted polarity-sensitive pattern has been increasingly undermined given that it is systematically violated on both zonal and regional scales as recently reported. Here, we approach the problem by exploring these violations in terms of eddy effects of spatiotemporal geostrophy, thermal fading, and flow dragging, yielding the following main conclusions.(1) The polarity-dependent deflection discrepancy is a pseudo feature resulting from a biased fit to the normalized eddy tracks which are spatially asymmetric(though azimuthally symmetric) between the two signs;Instead, the primary pattern of eddy deflection appears to be geographically correlated and polarity independent.(2) Geostrophic adjustment plays a critical role in defining the meridional movement of an eddy. Specifically, a consistent poleward(equatorward) trajectory bending of spatially(temporally) ageostrophic eddies is observed irrespective of their polarity.(3) The mechanism of eddy deflection is also determined by its zonal propagation direction. Westward propagating eddies are substantially affected by thermal fading, while opposite ones by flow dragging. A realistic and comprehensive understanding of eddy deflection mechanisms serves as a significant contribution to the prediction of eddy trajectory, and the protection of ocean environment.

关键词： Mesoscale eddies Eddy propagation Eddy meridional deflection Satellite observation Geostrophic adjustment

A refined representation method of the particle size distribution curve based on grading entropy

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Particuology 2024年第5期88卷 302-311页

作者： Xing Li Qun chen Zhaozhao Liu cheng Zhou chen Wang chen chen State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China

The particle size distribution(PSD)curve is an important expression of the basic properties of the *** characteristic parameters such as median particle size D_(50),effective particle size D_(10),and some combinations of characteristic parameters can only represent some points of the PSD curve,failing to represent all information of the PSD *** this paper,a fraction characteristic parameter F that could reflect the fraction size variation of the PSD curve was introduced based on grading *** a new presentation method of the A-B-F three parameters was proposed for a refined representation of the PSD *** was found that the newly constructed model not only better represents the differences in the width of PSD curves but also has a higher sensitivity than the A-B two-parameter model proposed by Lő*** PSD curves with similar distributions,the new presentation method has a higher degree of discrimination than that of the D_(50)-C_(u)-C_(c) three-parameter or the four-parameter combination G_(c) proposed by ***,the application of this new method in describing the spatial nonuniformity distribution of depositions and predicting the soil hydraulic conductivity was *** research results can provide a reference for the refined representation of PSD curves.

关键词： Grading entropy Particle size distribution curve Refined representation

Track correlation algorithm based on CNN-LSTM for swarm targets

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Journal of Systems Engineering and Electronics 2024年第2期35卷 417-429页

作者： chen Jinyang WANG Xuhua chen Xian Research Institute for National Defense Engineering Academy of Military SciencesLuoyang 471023China Information Engineering University Zhengzhou 450001China School of Computer Science and Technology Xidian UniversityXi’an 710071China

The rapid development of unmanned aerial vehicle(UAV) swarm, a new type of aerial threat target, has brought great pressure to the air defense early warning system. At present, most of the track correlation algorithms only use part of the target location, speed, and other information for *** this paper, the artificial neural network method is used to establish the corresponding intelligent track correlation model and method according to the characteristics of swarm ***, a route correlation method based on convolutional neural networks (CNN) and long short-term memory (LSTM)Neural network is designed. In this model, the CNN is used to extract the formation characteristics of UAV swarm and the spatial position characteristics of single UAV track in the formation,while the LSTM is used to extract the time characteristics of UAV swarm. Experimental results show that compared with the traditional algorithms, the algorithm based on CNN-LSTM neural network can make full use of multiple feature information of the target, and has better robustness and accuracy for swarm targets.

关键词： track correlation correlation accuracy rate swarm target convolutional neural network(CNN) long short-term memory(LSTM)neural network