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Isolation, characterization and phylogenetic analysis of a bacterial strain capable of degrading acetamiprid

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Journal of Environmental Sciences 2006年第1期18卷 141-146页

作者： YAO Xiao-hua MIN hang College of Life Science Zhejiang University Hangzhou 310029 China College of Agriculture Guangxi University Guangxi 530005 China

An aerobic bacterium, capable of degrading the new chloronicotine pesticide acetamiprid, was isolated from the sludge of pesticide factory after successive enrichment cultures and named strain FH2 which is a Gram-negative, rod-shaped, obligate aerobic organism with （（0.5-0.7）×（l.5-3.0））μm of cell size and with monotrichous flagellum. It was identified as a member of Pseudomonas sp. based on morphology, physio-biochemical properties, Biolog GN2, 16S rDNA sequence and phylogenetic characteristic analysis. The isolate could grow optimally at pH 7.0 and 30℃ in acetamiprid-mineral medium with 800 mg/L concentration. About 53.3% acetamiprid was degraded by strain FH2 after incubation for 14 d in acetamiprid-mineral medium and nearly 96.7% degraded when incubated in acetamiprid-yeast mineral medium at 30℃ for 14 d. This paper describes phylogenetic and degradation characterization of a pure bacterium being able to mineralize acetamiprid for the first time.

关键词： acetamiprid biodegradation characterization isolation Pseudomonas sp. 16S rDNA

高校图书馆“新质”知识服务赋能新质生产力的内在逻辑和服务模式研究

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大学图书情报学刊 2025年第1期43卷 3-9页

作者：冯春花中国矿业大学图书馆徐州221116

高校图书馆具有丰富的数据资源,强大的数据检索、知识发现与信息分析能力,在科技创新中处于知识链的结点位置,可以为科技创新和产学研协同创新提供“新质”知识和创新要素整合服务,助力科技创新和新质生产力形成。文章探究了高校图书馆... 详细信息

高校图书馆具有丰富的数据资源,强大的数据检索、知识发现与信息分析能力,在科技创新中处于知识链的结点位置,可以为科技创新和产学研协同创新提供“新质”知识和创新要素整合服务,助力科技创新和新质生产力形成。文章探究了高校图书馆服务于新质生产力的内在逻辑、知识优势和服务维度,提出以新颖性、知识性、联结性、生态性为特色的高校图书馆“新质”知识服务特点,围绕新颖性和高质量目标,构建高校图书馆前沿、多元差异化知识服务、联结平台服务、资源整合服务、生态培育服务的“新质”知识服务模式,助力产学研知识链和创新链科技创新与新质生产力形成,阐明了高校图书馆“新质”知识服务赋能新质生产力的推进路径和实现条件。

关键词：新质生产力高校图书馆科技创新知识服务协同创新

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Molecular ferroelectrics for efficient perovskite solar cells

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Science China Chemistry 2021年第2期64卷 169-170页

作者： chun-hua Yan Beijing National Laboratory for Molecular Sciences State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou 730000China

During the past decade,the power conversion efficiencies(PCEs)of organic-inorganic hybrid perovskite solar cells(PSCs)have exceeded 25%[1],which is expected to be one of the candidates for the next generation of thin-film photovoltaic *** speaking,the performance of PSCs mainly depends on the light absorption capacity,defect passivation and photo-induced exciton separation and extraction of perovskite *** the light illumination,photo-induced excitons were separated and extracted by the built-in electric field of PSCs.

关键词： perovskite illumination inorganic

Thermal transport mechanism of electrons and phonons in pristine and defective HfB_(2)

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Rare Metals 2023年第11期42卷 3651-3661页

作者： Ao Wang Shou-hang Li hua Bao Global Institute of Future Technology Shanghai Jiao Tong UniversityShanghai200240China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China College of Mechanical Engineering Donghua UniversityShanghai201620China

Hafnium diboride(HfB_(2))is an important metallic ceramic that works in harsh environments,due to its high strength and thermal *** the thermal conductivity of HfB_(2) has been measured,the experimental results are ***,the thermal transport mechanism of HfB_(2) is not well *** this work,we study the thermal transport in both pristine and defective HfB_(2) from first-principles *** the pristine HfB_(2),the room-temperature thermal conductivities are 175.0 and 157.7 W·m^(-1)·K^(-1)on a-and c-axes,respectively,where the contributions from electron and phonon are *** Lorenz number is significantly smaller than the Sommerfeld value and shows a temperature dependence,which demonstrates that the Wiedemann-Franz law cannot be used to estimate electronic thermal *** phonon-isotope and the phonon-electron scattering are non-negligible compared to the phonon-phonon *** the defective HfB_(2),the grain size effects are negligible with length scales larger than 1μ*** pore can limit thermal conductivity when its occupancy is larger than 10%.The vacancy is found to induce scattered results in *** phonon thermal conductivity significantly reduces even with only 1%vacancy,while the electronic thermal conductivity is not sensitive to the *** study provides an in-depth understanding of the thermal transport in HfB_(2),and the revealed mechanisms provide important guidance on the design of HfB_(2)-based materials.

关键词： Thermal conductivity Electrical transport properties Boltzmann transport equation Vacancy scattering First-principles calculation

Corrosion Behavior of the Ni-Cr-Fe Base Superalloy GH984G in a Synthetic Coal Ash and Flue Gas Environment

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Acta Metallurgica Sinica(English Letters) 2017年第9期30卷 863-868页

作者： Guang-Ming Liu hua-chun Yang Qin Liang Xiao-Chuan Yang Shan-Ping Ren Jian-hang huang School of Materials Science and Engineering Nanchang Hangkong University Dongfang Boiler Group Co. Ltd Material Research Institute

The corrosion behavior of the new Ni-Cr-Fe base superalloy GH984G in a synthetic coal ash and flue gas environments was studied at 700 ℃. The results showed that the corrosion rate was slow during the initial corrosion stage, then followed by a stage of faster mass loss. During the corrosion test, the scale trended to spall slightly, resulting in the formation of corrosion pits on the sample surfaces. The main corrosion products were identified as NiFeCrO4 and a small amount of Cr2O3. The scale microstructure involved the presence of three corrosion layers. The outer layer contained Cr, Ni, Fe, O and a small amount of S. Many micro-cracks were detected in the Cr-rich intermediate oxide layer. The inner corrosion layer was thin and rich in S. Internal sulfidation and internal oxidation occurred in the substrate. Because of its relatively high Cr content, the GH984G superalloy exhibited a good corrosion resistance under the test conditions.

关键词： Ni-Fe-Cr base superalloy Coal ash SO2 Corrosion

Global Solvability,Pattern Formation and Stability to a Chemotaxis-haptotaxis Model with Porous Medium Diffusion

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Acta Mathematica Sinica,English Series 2023年第8期39卷 1597-1623页

作者： chun hua JIN School of Mathematical Sciences South China Normal UniversityGuangzhou 510631P.R.China

In this paper,we deal with the following chemotaxis-haptotaxis system modeling cancer invasion with nonlinear diffusion,ut=Δum−χ∇·(u∇v)−ξ∇·(u∇ω)+μu(1−u−ω),inΩ×R^(+),vt−Δv+v=u,inΩ×R+,ωt=−vω,inΩ×R+,whereΩ⊂R^(N)is a bounded *** first supplement the results of global existence and uniform boundedness of solutions for the case m=2N N+*** for any m>0 and any spatial dimension,we consider the stability of equilibrium,and find that the chemotaxis has a destabilizing effect,that is for the ODEs,or the diffusion-ODE system without chemotaxis,the solutions tend to a linearly stable uniform steady state(1,1,0).When the chemotactic coefficientχis large,the equilibrium(1,1,0)become *** we study the existence of nontrivial stationary solutions via bifurcation techniques withχbeing the bifurcation parameter,and obtain nonhomogeneous *** last,we also investigate the stability of these bifurcation solutions.

关键词： Chemotaxis-haptotaxis porous medium diffusion pattern formation stability

A new color image encryption scheme based on chaos synchronization of time-delay Lorenz system

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Advances in Manufacturing 2016年第4期4卷 348-354页

作者： hua Wang hang-Feng Liang Zhong-hua Miao Shanghai Key Laboratory of Power Station AutomationTechnology School of Meehatronic Engineering andAutomation Shanghai University Shanghai 200072People's Republic of China

In this paper, a new image encryption scheme is presented based on time-delay chaos synchronization. Compared with existing methods, a new method is pro- posed and a lot of coupled items can be taken as zero items to simplify the whole system. A simple linear controller is introduced to realize time-delay chaos synchronization and image encryption. The positions of the image pixels are firstly shuffled and then be hidden in the cartier image. The address codes of the chaotic sequences are adopted to avoid the disturbances induced by the initial value and computer accuracy error. Simulation results for color image are provided to illustrate the effectiveness of the proposed method. It can be seen clearly that the system can converge quickly and the image can be encrypted rapidly.

关键词： Delay chaotic system Chaos synchronization Linear controller Color image encryption Address code

Phase-space tailoring for deterministic and in-situ regulation of photon transport

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Science China(Physics,Mechanics & Astronomy) 2022年第5期65卷 141-142页

作者： chun-hua Dong CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center For Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

Manipulating optical fields in microcavities is of great significance in fundamental optical physics and the development of advanced optical technology[1-7].In previous work,manipulating light dynamics in optical microcavities was carried out in real or momentum *** it has been successfully applied in many fields such as quantum optics and precision measurement.

关键词： space measurement momentum

An LMI-based decoupling control for electromagnetic formation flight

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Chinese Journal of Aeronautics 2015年第2期28卷 508-517页

作者： huang Xianlin Zhang chun Lu Hongqian Yin hang Center for Control Theory and Guidance Technology Harbin Institute of Technology

Electromagnetic formation flight （EMFF） leverages electromagnetic force to control the relative position of satellites. EMFF offers a promising alternative to traditional propellant-based spacecraft flight formation. This novel strategy is very attractive since it does not consume fuel. Due to the highly coupled nonlinearity of electromagnetic force, it is difficult to individually design a controller for one satellite without considering others, which poses challenges to communications. This paper is devoted to decoupling control of EMFF, including regulations, constraints and con- troller design. A learning-based adaptive sliding mode decoupling controller is analyzed to illustrate the problem of existing results, and input rate saturation is introduced to guarantee the validity of frequency division technique. Through transformation, the imposed input rate saturation is con- verted to state and input constraints. A linear matrix inequalities （LMI）-based robust optimal con- trol method can then be used and improved to solve the transformed problem. Simulation results are presented to demonstrate the effectiveness of the proposed decoupling control.

关键词： Decoupling control Electromagnetic forces Electromagnetic formationflight Linear matrix inequalities Satellite control