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Flexible feeding patterns of copepod Centropages tenuiremis in fluctuating conditions: a possible survival strategy to cope with disturbance

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Acta Oceanologica Sinica 2020年第2期39卷 59-68页

作者： Cuilian Xu Simin Hu Zhiling Guo Tao Li Hui Huang leo lai Chan Sheng Liu Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Provincial Key Laboratory of Applied Marine Biology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Tropical Marine Biological Research Station in Hainan Chinese Academy of SciencesSanya 572000China Shenzhen Key Laboratory for the Sustainable Use of Marine Biodiversity Research Centre for the Oceans and Human HealthCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China State Key Laboratory in Marine Pollution City University of Hong KongHong Kong 999077China

Centropages tenuiremis is a species with a wide distribution range in disturbed coastal ***,due to a lack of dietary information,it remains unclear as to how they maintain such dominance in fluctuating *** this study,*** was collected from the Daya Bay Nuclear Power Plant both in inlet and outfall regions at 06:00,12:00 and 18:00 on April 27,2011 and their in situ diet was analyzed using a PCR protocol targeting 18S ribosomal ***-four species of prey organisms were identified totally,including Dinophyta,Baciliariophyta,Viridiplantae,Rhizaria,Apicomplexa,Chordata,Mollusca,Arthropoda and Fungi,indicating an obvious omnivorous feeding habit of *** tenuiremis obviously exhibited spatial and temporal variations in diet *** plant prey(land plants and phytoplankton)were consumed in the morning(~50%),while more animal prey(metazoans and protozoans)were ingested at midday and night(60%–70%).Furthermore,a more diverse diet was detected in the outfall region(10–11 taxa),where the temperatures were relatively higher and more fluctuating,than in the control region(5–10 taxa).This finding indicated that *** could potentially expand its food spectrum under stressful ***,*** exhibited phytoplankton preference(58.62%–67.64%)in the outfall region with a lower omnivory index(0.27–0.35)than in the control region(0.51–0.95).However,phytoplankton density was lower than that in the control region,suggesting a possible herbivorous tendency of *** under elevated temperatures to balance the energy acquirement and feeding *** flexible food choices of *** observed here could effectively buffer environmental fluctuations and might be an important survival strategy in coastal ecosystems.

关键词： Centropages feeding response feeding strategy coastal ecosystem Daya Bay

Interfacial engineering of heterogeneous molecular electrocatalysts using ionic liquids towards efficient hydrogen peroxide production

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Chinese Journal of Catalysis 2022年第5期43卷 1238-1246页

作者： Zixun Yu Chang Liu Yeyu Deng Mohan Li Fangxin She leo lai Yuan Chen Li Wei School of Chemical and Biomolecular Engineering The University of SydneyDarlingtonNew South WalesAustralia

Efficient and selective oxygen reduction reaction(ORR)electrocatalysts are critical to realizing decentralized H_(2)O_(2)production and *** we demonstrate a facile interfacial engineering strategy using a hydrophobic ionic liquid(IL,i.e.,[BMIM][NTF2])to boost the performance of a nitrogen coordinated single atom cobalt catalyst(i.e.),cobalt phthalocyanine(CoPc)supported on carbon nanotubes(CNTs).We find a strong correlation between the ORR performance of CoPc/CNT and the thickness of its IL *** characterization revealed that a higher O_(2)solubility(2.12×10^(−3)mol/L)in the IL compared to aqueous electrolytes provides a local O2 enriched surface layer near active catalytic sites,enhancing the ORR ***,the hydrophobic IL can efficiently repel the as‐synthesized H_(2)O_(2)molecules from the catalyst surface,preventing their fast decomposition to H_(2)O,resulting in improved H_(2)O_(2)*** to CoPc/CNT without IL coatings,the catalyst with an optimal~8 nm IL coating can deliver a nearly 4 times higher mass specific kinetic current density and 12.5%higher H2O2 selectivity up to 92%.In a two‐electrode electrolyzer test,the optimal catalyst exhibits an enhanced productivity of 3.71 molH2O2 gcat^(–1)h^(–1),and robust *** IL‐based interfacial engineering strategy may also be extended to many other electrochemical reactions by carefully tailoring the thickness and hydrophobicity of IL coatings.

关键词： Hydrogen peroxide Ionic liquid Oxygen reduction reaction Single‐atom catalyst Heterogeneous molecular catalyst

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剧毒卡尔藻与东海原甲藻间的化感作用研究

海洋与湖沼 2019年第4期50卷 858-863页

作者：王蕊黄文雯吴佳俊陈荔王江涛香港城市大学深圳研究院海洋与人类健康研究中心深圳市海洋生物多样性可持续利用重点实验室深圳518000 香港城市大学海洋污染国家重点实验室香港999077 中国海洋大学化学化工学院青岛266100

为研究剧毒卡尔藻(Karlodinium veneficum)与东海原甲藻(Prorocentrum donghaiense)之间的化感作用,在f/2营养盐条件下,分别采用了混合培养及滤液培养的方法。结果表明:剧毒卡尔藻指数生长后期的无藻细胞滤液明显抑制了东海原甲藻的生长... 详细信息

为研究剧毒卡尔藻(Karlodinium veneficum)与东海原甲藻(Prorocentrum donghaiense)之间的化感作用,在f/2营养盐条件下,分别采用了混合培养及滤液培养的方法。结果表明:剧毒卡尔藻指数生长后期的无藻细胞滤液明显抑制了东海原甲藻的生长,而东海原甲藻滤液对剧毒卡尔藻的生长几乎无影响,化感作用作为重要的影响因素使剧毒卡尔藻获得竞争优势。将剧毒卡尔藻指数生长末期的无藻细胞滤液置于固相萃取(SPE)C18小柱,经吸附、不同比例的甲醇溶液洗脱,考察不同洗脱部分对东海原甲藻生长的影响,发现80%的甲醇洗脱部分明显抑制了东海原甲藻的生长。本研究为了解剧毒卡尔藻的竞争机制提供了重要的科学依据,今后将重点分析剧毒卡尔藻释放的有效抑制东海原甲藻生长的化感物质。

关键词：种间竞争化感作用剧毒卡尔藻东海原甲藻

高效液相色谱-串联质谱法快速测定海鳗鱼肉中3种太平洋雪卡毒素

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食品安全质量检测学报 2014年第11期5卷 3520-3528页

作者：麦艳玲林珊珊肖陈贵岳振峰吴佳俊康海宁林群声陈荔深圳市海洋生物多样性可持续利用重点实验室香港城市大学深圳研究院海洋与人类健康研究中心深圳518057 香港城市大学海洋污染国家重点实验室中国香港999077 深圳出入境检验检疫局食品检验检疫技术中心深圳市食品安全检测技术研发重点实验室深圳518045

目的建立了一种平行振荡方法萃取海鳗鱼肉中的3种太平洋雪卡毒素(P-CTX-1、P-CTX-2、P-CTX-3),并采用高效液相色谱-电喷雾串联质谱法同时测定P-CTX-1、P-CTX-2、P-CTX-3残留量的分析方法。方法海鳗等样品经甲醇并采用平行振荡方法提取,... 详细信息

目的建立了一种平行振荡方法萃取海鳗鱼肉中的3种太平洋雪卡毒素(P-CTX-1、P-CTX-2、P-CTX-3),并采用高效液相色谱-电喷雾串联质谱法同时测定P-CTX-1、P-CTX-2、P-CTX-3残留量的分析方法。方法海鳗等样品经甲醇并采用平行振荡方法提取,C18固相萃取柱净化后,采用高效液相色谱-电喷雾串联质谱分析测定。结果以基质标准曲线外标法定量,线性范围为0.01～50.0 ng/g,相关系数均大于0.999(r≥0.999,n=3),P-CTX-1、P-CTX-2、P-CTX-3的定量限分别为(LOQs,S/N=10)0.009、0.019、0.017 ng/g。以0.05、0.10、0.50 ng/g 3个添加浓度水平进行方法验证,回收率分别为72.9~81.0%、63.0~77.9%、46.3~69.5%,相对标准偏差分别为2.3~2.7%、2.1~12.2%、6.1~15.3%。结论该方法简便快速、灵敏度高,适用于鱼肉中同时快速检测3种太平洋雪卡毒素。

关键词：高效液相色谱-电喷雾串联质谱法平行振荡法太平洋雪卡毒素鱼肉

Spaceborne GPS receiver antenna phase center offset and variation estimation for the Shiyan 3 satellite

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Chinese Journal of Aeronautics 2016年第5期29卷 1335-1344页

作者： Gu Defeng lai Yuwang Liu Junhong Ju Bing Tu Jia College of Sciences National University of Defense Technology

In determining the orbits of low Earth orbit （leo） satellites using spaceborne GPS, the errors caused by receiver antenna phase center offset （PCO） and phase center variations （PCVs） are gradually becoming a major limiting factor for continued improvements to accuracy. Shiyan 3, a small satellite mission for space technology experimentation and climate exploration, was developed by China and launched on November 5, 2008. The dual-frequency GPS receiver payload delivers 1 Hz data and provides the basis for precise orbit determination within the range of a few centimeters. The antenna PCO and PCV error characteristics and the principles influencing orbit determination are analyzed. The feasibility of PCO and PCV estimation and compensation in different directions is demonstrated through simulation and in-flight tests. The values of receiver antenna PCO and PCVs for Gravity Recovery and Climate Experiment （GRACE） and Shiyan 3 satellites are estimated from one month of data. A large and stable antenna PCO error, reaching up to 10.34 cm in the z-direction, is found with the Shiyan 3 satellite. The PCVs on the Shiyan 3 satellite are estimated and reach up to 3.0 cm, which is slightly larger than that of GRACE satellites. Orbit validation clearly improved with independent k-band ranging （KBR） and satellite laser ranging （SLR） measurements. For GRACE satellites, the average root mean square （RMS） of KBR residuals improved from 1.01 cm to 0.88 cm. For the Shiyan 3 satellite, the average RMS of SLR residuals improved from 4.95 cm to 4.06 cm.

关键词： GRACE Phase center offset Phase center variations Shiyan 3 Spaceborne GPS

Behavior of pure and modified carbon/carbon composites in atomic oxygen environment

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 190-195页

作者： Xiao-chong Liu lai-fei Cheng Li-tong Zhang Xin-gang Luan Hui Mei Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and Engineering Northwestern Polytechnical University

Atomic oxygen （AO） is considered the most erosive particle to spacecraft materials in low earth orbit （leo）. Carbon fiber, car-bon/carbon （C/C）, and some modified C/C composites were exposed to a simulated AO environment to investigate their behaviors in leo. Scanning electron microscopy （SEM）, AO erosion rate calculation, and mechanical property testing were used to characterize the material properties. Results show that the carbon fiber and C/C specimens undergo significant degradation under the AO bombing. According to the effects of AO on C/C-SiC and CVD-SiC-coated C/C, a condensed CVD-SiC coat is a feasible approach to protect C/C composites from AO degradation.

关键词： atomic oxygen oxidation carbon/carbon composites ceramic matrix composites

Potassium pre-inserted K1.04Mn8O16 as cathode materials for aqueous Li-ion and Na-ion hybrid capacitors

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Journal of Energy Chemistry 2020年第7期29卷 53-61,I0002页

作者： Yamin Zhang Lina Chen Chongyang Hao Xiaowen Zheng Yixuan Guo Long Chen Kangrong lai Yinghe Zhang Lijie Ci Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Department of Physics Changji UniversityChangji 831100Xinjiang Uygur Autonomous RegionChina leo group Co. Ltd.Shanghai 200000China

For the applications of aqueous Li-ion hybrid capacitors and Na-ion hybrid capacitors,potassium ions are pre-inserted into MnO2 tunnel structure,the as-prepared K1.04Mn8 O16 materials consist of nanoparticles and nanorods were prepared by facile high-temperature solid-state *** as-prepared materials were well studied and they show outstanding electrochemical *** assembled hybrid supercapacitors with commercial activated carbon(YEC-8 A)as anode and K1.04Mn8 O16 as *** shows high energy and power ***-ion capacitors reach a high energy density of 127.61 Wh kg-1 at the power density of 99.86 W kg-1 and Na-ion capacitor obtains 170.96 Wh kg-1 at 133.79 W *** addition,the hybrid supercapacitors demonstrate excellent cycling performance which maintain 97%capacitance retention for Li-ion capacitor and 85%for Na-ion capacitor after 10,000 cycles.

关键词： K1.04Mn8O16 Pre-inserted Li-ion hybrid capacitors Na-ion hybrid capacitors Electrochemical behavior

High-Risk leo Satellite Network Path Detection Based on Spatial and Temporal Delay Anomaly Analysis

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China Communications 2023年第7期20卷 57-71页

作者： Tianyu Zhang Hewu Li Jun Liu Lu Lu Qian Wu Shaowen Zheng Zeqi lai Yuanjie Li Institute for Network Sciences and Cyberspace Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Beijing 100084China China Mobile Research Institute Beijing 100053China

The gradual deployment of Low-Earth Orbit(leo)mega constellations with inter-satellite links(ISLs)promises ubiquitous,low-latency,and high-throughput satellite network ***,networked leo satellites with ISLs are also at risk of routing attacks such as *** defenses against route hijacking in terrestrial networks can hardly work for the leo satellite network due to its high spatiotemporal *** deal with it,we propose RPD,a high-risk routing path detection method for leo mega-constellation *** detects abnormal high-risk leo network paths by checking the consistency between the path delay and the geographical *** is efficiently achieved by combining in-band measurements and out-of-band statistical processing to detect the anomaly of the clustering feature in the reference delay *** avoids the recalculation of the header cryptographic marks when the handover occurs,thus greatly reducing the cost and improving the performance of highrisk path *** showed that the proposed RPD mechanism achieves an average detection accuracy of 91.64%under normal network conditions,and maintain about 89%even when congestion occurs in multiple areas of the network and measurement noise is *** addition,RPD does not require any cryptographic operation on the intermediate node,only minimal communication cost with excellent scalability and deployability.

关键词： leo satellite networks route hijacking path verification risky path detection

Using recombinant adhesive proteins as durable and green flame-retardant coatings

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Synthetic and Systems Biotechnology 2021年第4期6卷 369-376页

作者： Weng I.leong Owen Lok In Lo Fong Tin Cheng Wai Man Cheong leo Chi U.Seak Pui Ching Middle School(Macao) Edificio Pui Ching7A Av.de Horta e CostaMacao SARChina Department of Physiology Development and NeuroscienceUniversity of CambridgeCambridgeCB23DYUnited Kingdom The Centre for Inflammation Research University of Edinburgh47 Little France CrescentEdinburghEH164TJUnited Kingdom

Current fire retardants are known to be toxic to humans and our *** environmental-friendly flame retardants(FRs),protein-based flame retardants have been studied extensively recently,even though they are not *** this study,we designed,synthesized and tested a durable protein-based FR through the fusion of the adhesion domain from either mussel foot protein-5(mfp-5)or cellulose-binding domain(CBD)with flame retardant protein(SR protein and alpha casein).We first verified the expression of the recombinant proteins in Escherichia coli using Western ***,we coated the fusion protein(carrying cell lysates)to cotton fabrics and wood and verified with Infrared(IR)*** a vertical burning test and wood flammability test,we confirmed the flame retardancy of the materials after the protein *** the vertical burning test,the SR protein and alpha casein flame retardant proteins with the CBD adhesion domain showed a 50.0%and 43.3%increase in flame *** data is also consistent in the wood flame retardancy *** imaging experiments also suggested these new fire retardants can be preserved on the materials well even after ***,our results showed that flame-retardant proteins with adhesion domains are high potential candidates of green alternative flame retardants.

关键词： Flame retardant protein Cellulose-binding domain(CBD) Mussel foot protein-5(mfp-5)