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Quantification of selected monohydroxy metabolites of polycyclic aromatic hydrocarbons in human urine

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Science China Chemistry 2015年第10期58卷 1579-1584页

作者： libin Liu Yueping Luo Junping Bi Haifang Li Jin-Ming Lin Key Laboratory of Monitoring for Heavy Metal Pollutants Hunan Province Environmental Monitoring Centre Beijing Key Laboratory of Microanalytical Methods and Instrumentation Department of Chemistry Tsinghua University

An analytical method was developed to quantitatively determine selected monohydroxy metabolites of polycyclic aromatic hydrocarbons(PAHs) in human urine. The procedure included enzymatic hydrolysis to cleave the conjugated metabolites, solid-phase microextraction enrichment, and gas chromatography-mass spectrometry analysis. The method proved to be sensitive enough to detect the selected PAH metabolites in human urine.

关键词： polycyclic aromatic hydrocarbons metabolites human urine solid-phase microextraction GC/MS

Experimental study on convective boiling heat transfer in narrow-gap annulus tubes

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Nuclear Science and Techniques 2004年第2期15卷 123-128页

作者： libin ZHAOJian-Fu ZHOUFang-De FANGZe-Mei HUWen-Rui NationalMicrogravityLaboratory InstituteofMechanicstheChineseAcademyofSciencesBeijing100080 TheNationallaboratoryofMultiphaseFlowinPowerEngineering Xi＇anJiaotongUniversityXi＇an710049

Since convective boiling or highly subcooled single-phase forced convection in micro-channels is an effective cooling mechanism with a wide range of applications, more experimental and theoretical studies are re- quired to explain and verify the forced convection heat transfer phenomenon in narrow channels. In this experimental study, we model the convective boiling behavior of water with low latent heat substance Freon 113 (R-113), with the purpose of saving power consumption and visualizing experiments. Both heat transfer and pressure drop characteris- tics were measured in subcooled and saturated concentric narrow gap forced convection boiling. Data were obtained to qualitatively identify the effects of gap size, pressure, flow rate and wall superheat on boiling regimes and the tran- sition between various regimes. Some significant differences from unconfined forced convection boiling were found, and also, the flow patterns in narrow vertical annulus tubes have been studied quantitatively.

关键词：对流沸腾热传导窄带环面管两相流冷却机制

A software-defined MAPE-K architecture for unmanned systems

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Science China(Information Sciences) 2023年第5期66卷 286-288页

作者： Mingyue JIANG libin ZHENG Zuohua DING Zhi JIN School of Information Science and Technology Zhejiang Sci-Tech University Key Laboratory of High Confidence of Software Technologies (MoE) Peking University

Dear editor,With the advances in software, sensors, and communication technologies, there is rapid development in unmanned systems. An unmanned system consists of unmanned vehicles,a control system and a communication system among its components. These kinds of systems, due to their specific autonomy and high mobility, ofer a wide range of applications and have been used as important tools in various domains.

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Coupled biodegradation of p-nitrophenol and p-aminophenol in bioelectrochemical system:Mechanism and microbial functional diversity

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Journal of Environmental Sciences 2021年第10期33卷 134-144页

作者： Jianjun Luo Yuxi Xu Jing Wang libin Zhang Xinbai Jiang Jinyou Shen Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China

Biodegradation mechanisms and microbial functional diversity during coupled pnitrophenol(PNP)and p-aminophenol(PAP)degradation were studied in a bioelectrochemical *** in the biocathode and PAP in the bioanode were almost completely removed within 28 hr and 68 hr *** degradation followed the steps including hydrating hydroxyalkylation,dehydrogenating carbonylation,and hydrolating ring cleavage,*** analysis based on the KEGG and egg NOG database annotations revealed the microbial composition and functional genes/enzymes related to phenol degradation in the *** predominant bacteria genera were Lautropia,Pandoraea,Thiobacillus,Ignavibacterium,Truepera and *** recognized biodegradation genes/enzymes related to pollutant degradation were as follows:pmo,hbd,&ppo for phenol degradation,nzba,amie,&badh for aromatic degradation,and CYP&p450 for xenobiotics degradation,*** co-occurrence of ARGs(antibiotic resistant genes),such as ade F,Mex J,Erm F,PDC-93 and Escherichiacolimdf A,etc.,were annotated in CARD database during the biodegradation *** Proteobacteria&Actinobacteria phylum was the primary host of both the biodegradation genes&ARGs in this *** microbial functional diversity ensured the effective biodegradation of the phenol pollutants in the bioelectrochemical system.

关键词： Phenols biodegradation Functional diversity Functional gene Metagenome

Highly efficient H-bonding charge-transfer complex for microsupercapacitors under extreme conditions of low temperatures

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Journal of Energy Chemistry 2020年第12期29卷 182-189页

作者： libin Wang Ting Shu Songtao Guo Shi Chen Yingjun Jiang Xianluo Hu State Key Laboratory of Materials Processing and Die Sf Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Owing to sluggish ionic mobility at low temperatures, supercapacitors, as well as other energy-storage devices, always suffer from severe capacity decay and even failure under extreme low-temperature circumstances. Solar-thermal-enabled self-heating promises an attractive approach to overcome this ***, we report a unique H-bonding charge-transfer complex with a high photothermal conversion efficiency of 79.5% at 405 nm based on chloranilic acid and albendazole. Integrated with a microsupercapacitor, the chloranilic acid-albendazole complex(CAC) film prompts an apparent temperature increase of 22.7 °C under 1 sun illumination at-32.6 °C, effectively elevating the working temperature of *** a result, the rate capability of the microsupercapacitor has been significantly improved with a 17-fold increase in capacitance at a current density of 60 μA cm^(-2), leading to outstanding low-temperature performances. Importantly, the integrated device is capable of working at a low temperature of-30 °C in the open air, which demonstrates the potential of CAC in practical applications for low-temperature ultracapacitive energy-storage devices.

关键词： Charge-transfer complexes Solar-thermal conversion Extreme conditions Microsupercapacitors Low temperature

A characteristic curve-based numerical framework for predicting strength of multi-bolted composite joints subjected to hygrothermal condition

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Chinese Journal of Aeronautics 2024年第11期37卷 265-277页

作者： Meijuan SHAN Ruifeng ZHANG Yu GONG Fengrui LIU libin ZHAO Ning HU Department of Mechanics School of Physical Science and EngineeringBeijing Jiaotong UniversityBeijing 100044China College of Aerospace Engineering Chongqing UniversityChongqing 400044China School of Astronautics Beihang UniversityBeijing 100191China School of Mechanical Engineering and Key Laboratory of Hebei Province on Scale-span Intelligent Equipment Technology Hebei University of TechnologyTianjin 300401China

Many works have been made for predicting the failure of composite ***,there is still lack of method for multi-bolted composite joints subjected to the hygrothermal *** this work,a characteristic curve-based numerical framework is proposed,which includes two main steps and shows low computational ***,a 3D finite element model considering hygrothermal effects is established to analyze the bolt-load distribution of multi-bolted ***,a new characteristic curve considering the hygrothermal influence is used to obtain the failure pattern and strength of composite *** two-,three-and four-bolted composite joints with-55℃/dry(CTD),23℃/dry(RTD)and 70℃/wet(ETW)conditions are *** test outcomes present good agreement with predicted results,which illustrates the effectiveness and applicability of the proposed ***,it is shown that the environmental condition affects the bolt-load ratio slightly,but does not change the location of the key loaded ***,deviations of the strengths in CTD and ETW conditions are about 5%and-16%from that in the RTD condition,*** environmental condition does not affect the failure modes of two-and three-bolted joints,whereas changes the failure mode of the four-bolted *** proposed method is efficient,reliable and needs only linear elastic FE analysis,making it applicable for engineering practice.

关键词： Polymer-matrix composite Hygrothermal condition Multi-bolted joint Strength FE analysis Characteristic curve

Dynamic analysis of a latent HIV infection model with CTL immune and antibody responses

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International Journal of Biomathematics 2024年第3期17卷 289-316页

作者： Zhiqi Zhang Yuming Chen Xia Wang libin Rong School of Mathematics and Statistics Xinyang Normal University XinyangHenan 464000P.R.China Department of Mathematics Wilfrid Laurier University WaterlooONN2L 3C5Canada Department of Mathematics University of Florida GainesvilleFL 32611USA

This paper develops a mathematical model to investigate the Human Immunodeficiency Virus(HIV)infection *** model includes two transmission modes(cell-to-cell and cell-free),two adaptive immune responses(cytotoxic T-lymphocyte(CTL)and antibody),a saturated CTL immune response,and latent HIV *** existence and local stability of equilibria are fully characterized by four reproduction *** sensitivity analyses,we assess the partial rank correlation coefficients of these reproduction numbers and identify that the infection rate via cell-to-cell transmission,the number of new viruses produced by each infected cell during its life cycle,the clearance rate of free virions,and immune parameters have the greatest impact on the reproduction ***,we compare the effects of immune stimulation and cell-to-cell spread on the model's *** findings highlight the significance of adaptive immune responses in increasing the population of uninfected cells and reducing the numbers of latent cells,infected cells,and ***,cell-to-cell transmission is identified as a facilitator of HIV *** analytical and numerical results presented in this study contribute to a better understanding of HIV dynamics and can potentially aid in improving HIV management strategies.

关键词： HIV infection cell-to-cell transmission adaptive immune response latent infection local stability

Fruit harvesting continuum manipulator inspired by elephant trunk

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International Journal of Agricultural and Biological Engineering 2015年第1期8卷 57-63页

作者： Shao Tiefeng Zhang libin Du Mingyu Bao Guanjun Yang Qinghua Key Laboratory of E&M(Zhejiang University of Technology) Ministry of Education&Zhejiang ProvinceHangzhou 310032China China Jiliang University Hangzhou 310018China

By combining the investigation of the biomechanics and behavior of elephant trunk in the performance of a wide range of dexterous manipulations,a novel approach in the design and kinematics modeling of a fruit harvesting continuum manipulator was *** comparing the structure of two different species of elephant trunk,a new continuum structure which matched the key features of elephant trunk was *** on analysis of the underlying elephant trunk’s grasping mode,a novel kinematics model was *** to traditional robot kinematics which focused on end effector’s position and posture,the proposed continuum manipulator kinematics focus on the center of manipulator’s position and posture,which is more effective when trunk robot realizing grasp and establishes the foundation for its ***,three typical grasping experiments were *** experiment results showed that the manipulator could conduct wrap/pinch manipulations effectively for both small objects and bigger ones.

关键词： fruit harvesting continuum manipulator kinematics bionics Jacobian singularities

A novel magnetic silica supported spinel ferrites NiFe2O4 catalyst for heterogeneous Fenton-like oxidation of rhodamine B

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Chinese Chemical Letters 2019年第6期30卷 1198-1203页

作者： Jifeng Qu Tinghua Che libin Shi Qinghua Lu Suitao Qi School of Chemical Engineering and Technology Xi’an Jiaotong University

A series of spinel fe rrites magnetic nanopa rticles NiFe2 O4 we re synthesized as the heterogeneous Fentonlike catalyst by hydrothermal method and then NiFe2 O4@SiO2 catalysts were obtained by the modification of NiFe2 O4 via micro emulsion ***,VSM,FTIR,SEM,TEM,BET and XPS were carried to analyze the difference between the above two ***2 O4@SiO2 catalyst exhibited the higher catalytic activity than NiFe2 O4 for the degradation of Rhodamine B owe to the outer Si02 layers surface,the more important is both of them showed the better catalytic performance when at neutral pH environment.

关键词： Heterogeneous Fenton-like oxidation Spinel ferrites Magnetic Synthesis Neutral environment