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Diet and Prey Selection of the Invasive American Bullfrog(Lithobates catesbeianus) in Southwestern China

Asian Herpetological Research 2015年第1期6卷 34-44页

作者： xuan liu Yu LUO Jiaxin CHEN Yisong GUO Changming BAI Yiming LI Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences School of Life Science Guizhou Normal University School of Life Science South China Normal University Department of Ecology Chemistry and Environmental Engineering Yunyang Teachers' College Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences

Invasive predators have been widely regarded as one of the principle drivers of the global decline of amphibians, which are among the most threatened vertebrate taxon on Earth. The American bullfrog （Lithobates catesbeianus） is identiifed as one of the most successful vertebrate invaders and has caused the decline or extinction of some native amphibians in many regions and countries including China. Based on ifeld surveys and stomach content analyses, we examined the diet composition of the invasive bullfrog for the ifrst time in two invaded populations in Yunnan Province, southwestern China, a region of global conservation priority, during the breeding season from 2008 to 2014. Additionally, we conducted the first quantitative study on the prey selection of this global invader among their invaded ranges after controlling for the local anuran assemblage and other aquatic preys in the environment. Our results showed that the range of food items in the stomachs of bullfrogs spanned more than 30 species belonging to ten taxonomic classes. Both of post-metamorphosis individuals and juveniles preyed upon native frogs, independent of the bullfrog’s body size and mouth width. Importantly, Jacobs’ selection index showed a bullfrog preference for the Yunnan pond frog （Babina pleuraden）, one native endemic anuran with population decline, in terms of both food volume and occurrence. We therefore provided direct evidence on the predation impact of the invasive bullfrog on an endemic anuran and urged further efforts to prevent the dispersal of this invader into more fragile habitats to reduce their negative impacts on native amphibians.

关键词： Amphibian decline American bullfrog diet preferences invasive species Babina pleuraden predation

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Self-assembly and morphological characterization of two-component functional amyloid proteins

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Chinese Chemical Letters 2017年第5期28卷 1062-1068页

作者： Qi Qi Tian-Xin Zhao Bo-Lin An xuan-Yong liu Chao Zhong School of Physical Science and Technology Shanghai Tech UniversityShanghai 200120China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China

Functional amyloid has been increasingly applied as self-assembling nanostructures to construct multifunctional ***,little has been known how different side domains,varied fusion positions and subunits affect self-assembly and morphologies of amyloid ***,we constructed three groups of two-component amyloid proteins based on CsgA,the major protein components of Escherichia coli biofilms,to bridge these *** showed that all fusion proteins have amyloid features,as indicated by Congo red *** force microscopy（AFM） indeed reveals that these fusion proteins are able to self-assemble into fibrils,with an average diameter of 0.5-2 nm and length of hundreds of nanometers to several *** diameter of fibrils increases with the increase of the molecular weight of fusion domains,while the dynamic assembly of recombinant proteins was delayed as a result of the introduction of fusion ***,fusion of the same functional domains but at intermediate position seems to cause the most interference on fibril assembly compared with those fused at C or Nterminus,as mainly short and irregular fibrils were *** phenomenon appears more pronounced for randomly coiled mussel foot proteins（Mfps） than for rigid chitin-binding domain（CBD）.Finally,increase of the molecular weight of tandem repeats in protein monomer seemed to increase the fibril diameter of the resultant fibrils,but either reduction of the tandem repeats of CsgA to one single belta-sheet loop or increase in the number of tandem repeats of CsgAs from one to four produced shorter and intermittent fibrils compared with CsgA control *** studies therefore provide insights into self-assembly of two-component amyloid proteins and lay the foundation for rational design of multifunctional molecular biomaterials.

关键词： Amyloid Biofilms Atomic force microscopy Self-assembly Nanomaterials Supramolecular structure

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Green synthesis of luminescent La-MOF nanoparticle from waste poly(ethylene terephthalate) for high-performance in Fe(Ⅲ) detection

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Rare Metals 2024年第8期43卷 3833-3843页

作者： Zhi Gong Zhi-Kui Dai Zhi-Yue Dong Qiu-xuan liu Valentin A.Milichko Hua-Jian liu Jie liu Ran Niu Jiang Gong Key Laboratory of Material Chemistry for Energy Conversion and Storage Hubei Key Laboratory of Material Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSemiconductor Chemistry CenterSchool of Chemistry and Chemical EngineeringMinistry of EducationHuazhong University of Science and TechnologyWuhan 430074China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430073China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China School of Physics and Engineering ITMO UniversitySt.Petersburg197101Russia School of Materials Science and Engineering Hubei UniversityWuhan430062China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing School of Mechanical and Automotive EngineeringKey Laboratory of Polymer Processing EngineeringMinistry of EducationSouth China University of TechnologyGuangzhou 510641China

Developing luminescent metal-organic frameworks(MOFs) capable of high-efficiency Fe^(3+)sensing has aroused great attraction in the fields of biology,chemistry,***,previous solvothermal methods are limited by organic solvent usage,time consuming,high pressure,and high-energy ***,we propose the waste-toMOF strategy towards the scale-up production of La-MOF nanoparticles through the ball milling of recycled poly(-ethylene terephthalate)(PET) bottles and La(NO_(3))_(3)·_(6)H_(2)*** goes on alkaline hydrolysis to form 1,4-benzenedicarboxylic acid sodium salt(Na_(2)BDC) and ethylene glycol by ball ***,BDC reacts with La^(3+)to form *** as-prepared La-MOF crystal nanoparticles possess a rod-like morphology with the size of few hundred ***,La-MOF nanoparticles display high selectivity and sensitivity for Fe^(3+)*** quenching constant and limit of detection are 5.29×10^(3)(mol·L^(-1))^(-1) and 0.147 μmol·L^(-1),respectively,thus surpassing many advanced Fe^(3+) *** to the result of density functional theory,the high Fe^(3+) detection performance of La-MOF is related to the complexing of Fe^(3+)with La-MOF,which leads to the gradual dissociation of the coordination bond between terephthalic acid and La^(3+).It is anticipated that the mechanochemistry milling-based wasteto-MOF strategy provides a new platform for the massive production of functional MOFs in a green manner.

关键词： Metal-organic framework Waste polyester Mechanochemistry milling Fluorescence sensor

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Fiber-optic Fourier-domain common-path OCT

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Chinese Optics Letters 2008年第12期6卷 899-901页

作者： xuan liu Xiaolu Li Do-Hyun Kim Ilko Ilev Jin U. Kang Department of Electrical and Computer Engineering Johns Hopkins University 3400 N. Charles Street Baltimore MD 21218 USA Center for Devices and Radiological Health FDA 10903 New Hampshire Avenue Silver Spring MD 20993-0002 USA

We experimentally and theoretically investigated the performance of a fiber-optic based Fourier-domain common-path optical coherence tomography （OCT）. The fiber-optic common-path OCT operated at the 840-nm center wavelength. The resolution of the system was 8.8 μm （in air） and the working depth using a bare fiber probe was approximately 1.5 mm. The signal-to-noise ratio （SNR） of the system was analyzed. OCT images obtained by the system were also presented.

关键词： Fast Fourier transforms Image display Light emitting diodes Multiple scattering Optical coherence tomography Optical devices

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Design and calculation of a side-coupled accelerating structure

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Nuclear Science and Techniques 2017年第11期28卷 204-209页

作者： Ming-xuan liu Cong-Feng Wu Yun-Gai Tang Gui-Rong Huang National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei 230029 China

In this paper, we present the design and optimization of a side-coupled accelerating structure with an energy switch. The beam parameters are optimized, and the electric field asymmetry in the first cell is analyzed. The new structure we designed has an improvement of 10 times in the accelerating field symmetry. Thermo-mechanical analysis is performed based on the electromagnetic results. The highest temperature is 72.5 ℃ at the nose cone, and the maximal deformation is 73 μm at the outer edge of the coupling cavity.

关键词： Side-coupled accelerating structure Energy switch Beam dynamics Asymmetry Thermomechanical analysis

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Improving Parameter Estimation and Defensive Ability of Latent Dirichlet Allocation Model Training Under Rényi Differential Privacy

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Journal of Computer Science & Technology 2022年第6期37卷 1382-1397页

作者： Tao Huang Su-Yun Zhao Hong Chen Yi-xuan liu Key Laboratory of Data Engineering and Knowledge Engineering(Renmin University of China) Ministry of Education Beijing 100087China School of Information Renmin University of ChinaBeijing 100087China

Latent Dirichlet allocation(LDA)is a topic model widely used for discovering hidden semantics in massive text *** Gibbs sampling(CGS),as a widely-used algorithm for learning the parameters of LDA,has the risk of privacy ***,word count statistics and updates of latent topics in CGS,which are essential for parameter estimation,could be employed by adversaries to conduct effective membership inference attacks(MIAs).Till now,there are two kinds of methods exploited in CGS to defend against MIAs:adding noise to word count statistics and utilizing inherent *** two kinds of methods have their respective *** sampled from the Laplacian distribution sometimes produces negative word count statistics,which render terrible parameter estimation in *** inherent privacy could only provide weak guaranteed privacy when defending against *** is promising to propose an effective framework to obtain accurate parameter estimations with guaranteed differential *** key issue of obtaining accurate parameter estimations when introducing differential privacy in CGS is making good use of the privacy budget such that a precise noise scale is *** is the first time that R′enyi differential privacy(RDP)has been introduced into CGS and we propose RDP-LDA,an effective framework for analyzing the privacy loss of any differentially private ***-LDA could be used to derive a tighter upper bound of privacy loss than the overestimated results of existing differentially private CGS obtained byε-*** RDP-LDA,we propose a novel truncated-Gaussian mechanism that keeps word count statistics *** we propose distribution perturbation which could provide more rigorous guaranteed privacy than utilizing inherent *** validate that our proposed methods produce more accurate parameter estimation under the JS-divergence metric and obtain lower precision and recall when defending against MIAs.

关键词： latent Dirichlet allocation parameter estimation membership inference attack Rényi differential privacy

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A novel evolving model for power grids

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Science China(Technological Sciences) 2010年第10期53卷 2862-2866页

作者： liu xuan, liu TianQi & LI XingYuan School of Electrical Engineering and Automation, Sichuan University, Chengdu 610065, China School of Electrical Engineering and Automation Sichuan University Chengdu China

In this paper,a novel power grid evolving model,which can well describe the evolving property of power grids,is presented. Based on the BA model,motivated by the fact that in real power grids,connectivity of node not only depends on its degree,but also is influenced by many uncertain factors,so we introduce the subconnection factor K for each node. Using the mean-field theory,we get the analytical expression of power-law degree distribution with the exponent γ∈ (3,∞ ). Finally,simulation results show that the new model can provide a satisfactory description for empirical characteristics of power network,and power network falls somewhere in between scale-free network and uncertain network.

关键词： power grid evolving model scale-free

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Water-stable Mn-based MOF nanosheet as robust visible-light-responsive photocatalyst in aqueous solution

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Science China Chemistry 2020年第12期63卷 1756-1760页

作者： Yejun Xiao Xiangyang Guo Tongtong Yang Junxue liu xuan liu Yu Xiao Lifang liu Taifeng liu Sheng Ye Jun Jiang Fuxiang Zhang Can Li State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energythe Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in NanoscienceSchool of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026China State Key Laboratory of Molecular Reaction Dynamics the Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalin 116023China University of Chinese Academy of Sciences Beijing 100049China National&Local Joint Engineering Research Center for Applied Technology of Hybrid Nanomaterials Collaborative Innovation Center of Nano Functional Materials and Applications of Henan ProvinceHenan UniversityKaifeng 475000China

Development of visible-light-responsive metal-organic frameworks(MOFs) for promising solar energy conversion has inspired continuous interest, but it still suffers from poor stability especially in aqueous solution and/or under photoirradiation due to their relatively labile coordination bonds. Herein, a new synthesized layered Mn-based MOF(Mn-TBAPy-BK) and its exfoliated twodemensional nanosheets(Mn-TBAPy-NS) are revealed to be highly stable no matter in aqueous solution with wide p H region or under visible light irradiation. As expected, the exfoliated Mn-TBAPy-NS exhibits enhanced surface area, shortened charge transfer distance, and superior charge separation with respect to the bulk one. Moreover, the as-obtained nanosheets can be employed as effective building block for nanocomposite and heterostructure assembly to further promote charge separation as well as solar hydrogen production from aqueous solution under visible light. The finding of water stable MOF nanosheet under visible light demonstrates its promising future for solar energy conversion.

关键词： metal-organic framework nanosheet water stable photocatalyst nanocomposite

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Boosting Zn||I_(2) Battery’s Performance by Coating a Zeolite‑Based Cation‑Exchange Protecting Layer

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Nano-Micro Letters 2022年第5期14卷 168-180页

作者： Wenshuo Shang Qiang Li Fuyi Jiang Bingkun Huang Jisheng Song Shan Yun xuan liu Hideo Kimura Jianjun liu Litao Kang College of Environment and Materials Engineering Yantai UniversityYantai 264005People’s Republic of China State Key Laboratory of High‑Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Huaiyin Institute of TechnologyHuai’an 223003People’s Republic of China

The intrinsically safe Zn||I_(2) battery,one of the leading candidates aiming to replace traditional Pb-acid batteries,is still seriously suffering from short shelf and cycling lifespan,due to the uncontrolled I_(3)^(−)-shuttling and dynamic parasitic reactions on Zn *** the fact that almost all these detrimental processes terminate on the surfaces of Zn anodes,modifying Zn anodes’surface with protecting layers should be one of the most straightforward and thorough approaches to restrain these ***,a facile zeolite-based cation-exchange protecting layer is designed to comprehensively suppress the unfavored parasitic reactions on the Zn *** negatively-charged cavities in the zeolite lattice provide highly accessible migration channels for Zn^(2+),while blocking anions and electrolyte from passing *** low-cost cation-exchange protecting layer can simultaneously suppress self-discharge,anode corrosion/passivation,and Zn dendrite growth,awarding the Zn||I_(2) batteries with ultra-long cycle life(91.92%capacity retention after 5600 cycles at 2 A g^(−1)),high coulombic efficiencies(99.76%in average)and large capacity(203–196 mAh g^(−1) at 0.2 A g^(−1)).This work provides a highly affordable approach for the construction of high-performance Zn-I_(2) aqueous batteries.

关键词： Zeolite Protecting layer Zn-I_(2)aqueous battery Shuttle Parasitic reactions

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人类白细胞抗原相合同胞新鲜脐血移植治疗儿童β重型地中海贫血

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中国组织工程研究 2025年第23期29卷 4899-4906页

作者：温建芸陈丽白何岳林冯晓勤刘璇徐肖肖李秀刘秋君吴学东南方医科大学南方医院儿科广东省广州市510515

背景:异基因造血干细胞移植是目前根治重型地中海贫血最有效的方法,然而仅有不到一半的患者能找到相合的骨髓或外周血干细胞。同胞来源脐血干细胞与骨髓和外周血干细胞具有不同的特征,是重型地中海贫血患者移植治疗的一种潜在造血干细... 详细信息

背景:异基因造血干细胞移植是目前根治重型地中海贫血最有效的方法,然而仅有不到一半的患者能找到相合的骨髓或外周血干细胞。同胞来源脐血干细胞与骨髓和外周血干细胞具有不同的特征,是重型地中海贫血患者移植治疗的一种潜在造血干细胞替代来源。目的:探讨应用人类白细胞抗原相合同胞新鲜脐血移植治疗儿童β重型地中海贫血的疗效。方法:选择2010年6月至2020年6月南方医科大学南方医院收治的β重型地中海贫血患儿48例,男28例,女20例,中位年龄4岁,均接受人类白细胞抗原相合同胞新鲜脐血移植治疗,脐血移植前均采用清髓性不含抗胸腺细胞球蛋白的预处理方案,脐血移植后均采用环孢素A+吗替麦考酚酯+/-短程甲氨蝶呤预防移植物抗宿主病。结果与结论:(1)48例患儿输注的总有核细胞中位数为8.17×10^(7)/kg,输注的CD34^(+)细胞中位数为2.40×10^(5)/kg,脐血移植后中位随访时间98个月,44例植入成功,粒细胞和血小板植入中位时间分别为28 d和31 d,其中37例移植后植入证据检测为供者型完全嵌合,7例移植后早期检测为供受者稳定混合嵌合;(2)44例植入成功患儿中,4例发生急性移植物抗宿主病,分别为Ⅰ级(n=2)和Ⅱ级(n=2),受累器官均为皮肤,均未发生慢性移植物抗宿主病;(3)脐血移植后,48例患儿中5例发生巨细胞病毒感染及激活,12例发生败血症,3例发生侵袭性真菌病,21例发生口腔炎,8例发生出血性膀胱炎,1例发生肝静脉闭塞;(4)48例患儿中,47例存活,1例在移植后28 d因重症肺炎合并急性心力衰竭死亡,43例无病存活,3例发生原发性植入失败,1例发生移植后全血细胞减少,5年总生存率和无病生存率分别为98%和89%,1年时移植相关死亡的累计发病率为2.1%;(5)结果显示,人类白细胞抗原相合同胞新鲜脐血移植治疗儿童β重型地中海贫血的效果良好,移植物抗宿主病的发生风险低。

关键词：异基因造血干细胞移植新鲜脐血移植 β重型地中海贫血移植物抗宿主病儿童

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