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Evaluation of Beauveria bassiana （Hyphomycetes） isolates as potential agents for control of Dendroctonus valens

Insect Science 2011年第2期18卷 209-216页

作者： Long-Wa Zhang yu-jun liu Jian Yao Bin Wang Bo Huang Zeng-Zhi Li Mei-Zhen Fan Jiang-Hua Sun Anhui Provincial Key Laboratory of Microbial Pest Control Anhui Agricultural University Heifei Anhui Entry-Exit Inspection and Quaran- tine Bureau Hefei State Key Laboratory of Integrated Management Agricultural Pest & Rodents Institute of Zoology Chinese Academy of Sciences Beijing China

The red turpentine beetle （RTB）, Dendroctonus valens LeConte, as a destructive invasive pest, has become one of the most economically important forest pest in China. Effective control measures are desperately needed. Entomopathogenic fungi, such as Beauveria bassiana, have shown great potential for the management of some bark beetle species. In this study, 12 isolates of B. bassiana from bark beetle were examined for biological characteristics and virulence, to assess their potential as biocontrol agents for RTB. There were significant differences （at P = 0.05） in colony growth rate, conidial yield, conidial germination, tolerance to UV light and extracellular proteases activity among the tested B. bassiana isolates. Isolates, including Bbl801, Bb1906, Bb789 and Bb773, exhibited the best characteristics, because they have faster hyphal growth rate, higher spore production and faster spore germination, higher UV tolerance and protease （Prl） production. The results of a pathogenicity test ofB. bassiana on RTB larvae showed that most isolates of B. bassiana have demonstrated high efficacy and the highest virulent isolate was Bb 1801, which killed 100% of the treated insects and had a median lethal time （LT50） of 4.60 days at a concentration of 1 ×107 conidia/mL. Therefore, isolate Bb1801 has a great potential for sustainable control of RTB in the forest. The correlation between biological characteristics and virulence of the fungal isolates is discussed and the possibility of combination of entomopathogenic fungi with semiochemicals, as one of the promising strategy for RTB control, is considered.

关键词： Beauveria bassiana biological characteristics microbial control Dendroctonus valens virulence

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Six-step synthesis of Leonurine and toxicity study on zebrafish

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Chinese Chemical Letters 2017年第6期28卷 1172-1175页

作者： Hui Zhao Xiang-Guo Hu Min-Jie Xu Qun-Xing Cai yu-jun liu Duo-Meng Su Shi-Jin Chen Kai Wang Zhu-Nan Gong Anhui Engineering Technology Research Center for Extraction and Isolation of Active Components Anhui Academy of Applied Technology Hefei 230031China National Engineering Research Center for Carbohydrate Synthesis Jiangni Normal University Nanchang 330022 China School of Life Science Nanjing Normal University Nanjing 210023 China Anhui Academy of Science and Technology Hefei 230031 China

Leonurine（1）,an important ingredient in leonurus sibiricus L,can be used for some gynecological *** have developed a concise and efficient synthetic route of Leonurine,which can be optimized for mass *** available compound 6 and 2,3-dihydrofuran（7） were used as starting *** the toxicity study on zebrafish shows that Leonurine would promote the hatching of zebrafish embryos at low concentration and result in acute death or chronic lethal toxicity at high concentration.

关键词： Leonurine Zebrafish Synthesis Toxcity Oxime

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APPLICATION OF MICROWAVE IRRADIATION TO THE SYNTHESIS OF SOME ALKALI METAL METAVANADATES

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Chinese Chemical Letters 1992年第2期3卷 109-110页

作者： Wen Guo XU~*, Ai Min yu, jun liu Department of chemistry, Jilin University, Changchun, 130023

Application of microwave irradiation to the syhthesis of some alkali metal metavanadates in a fraction of time required by the conventional synthetic method (2min for LiVO_3, 3.5min for NaVO_3) is described.

关键词： der

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ANALYSIS OF THE ENVIRONMENT FEATURE OF BREEDING AREA AND ENDANGERED FACTORS OF RED-CROWNED CRANE IN CHINA

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Chinese Geographical Science 2001年第2期11卷 186-191页

作者： yu jun-bao, liu Jing-shuang, WANG Jin-da (Changchun Institute of Geography, the Chinese Academy of Sciences, Changchun 130021,P.R.China) Changchun Institute of Geography the Chinese Academy of Sciences Changchun P. R. China

Red-crowned Crane (Grus japonensis), a kind of endangered large-scale wader, is one of valuable and rare birds in the world. It has been indexed in China Red Data Book of Endangered Animals (Aves), China Data Book of Major Protection Wild Animals, World Red Data Book of Birds, State Trade Protocol of Endangered Wild Plants and Animals Species. The paper studies the amount, distribution, habit, growth and habitat of Red-crowned Crane in China in detail, systematically analyses the ecological environment feature of Red-crowned Crane breeding area, including the vegetation feature, the vertical distribution law of absolute humidity and temperature, some carnivorous food and herbivorous food for Red-crowned Crane. At present, the ecological environment of breeding area has been destroyed seriously by human activity. The area of marshland is reduced rapidly. A large area of reeds has been disappeared. The survival of Red-crowned Crane is threatened greatly. So it′s necessary to maintain the biodiversity of breeding area in order to protect Red-crowned Crane. .

关键词： Red-crowned Crane nature reserve conservation environment

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Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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Journal of Energy Chemistry 2025年第1期100卷 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling liu Biao Meng Tao Chen yu Han jun Wang Shibo Xi yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Activation energy

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Preparation and characterization of PZT thick film enhanced by ZnO nanowhiskers for MEMS piezoelectric generators

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Progress in Natural Science:Materials International 2011年第2期21卷 159-163页

作者： Zhong-xia DUAN~1,Guo-qin yu~2,jun-biao liu~1,jun liu~2,Xiao-wen DONG~2,Li HAN~1,Peng-yun JIN~1 1.Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China 2.Shanghai Municipal Electric Power Company,Shanghai 200025,China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China Shanghai Municipal Electric Power Company Shanghai 200025 China

A hybrid sol-gel route which was used to fabricate PZT thick film for MEMS piezoelectric generators was investigated. （100）-oriented Pb(Zr0.52Ti0.48)O3thick films enhanced by ZnO nanowhiskers（ZnOw） were successfully prepared on Pt/Cr/SiO2/Si substrates via spin-coating ZnOwsuspension and PZT *** influences of film thickness on the microstructure and electrical properties of composite thick film were *** results show that PZT composite thick films have（100）-oriented perovskite *** results show that,the surface of as-prepared（100）-oriented PZT piezoelectric composite thick film is smooth,compact and crack-free,and the cross section is *** composite thick films exhibit good ferroelectric,dielectric and piezoelectric properties.2 urn-thick（100）-oriented PZT piezoelectric composite thick film has the remnant polarization intensity and coercive field of 6.7μC/cm2and 92.5 kV/cm,the dielectric constant and dielectric dissipation of 1 431 and 0.44,respectively,and piezoelectric constant d33is calculated to be 151.0 pC/*** composite thick film is good to meet the use of MEMS piezoelectric generators.

关键词： PZT thick film ZnO nanowhisker electrical properties piezoelectric generator

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Approach from the laboratory to the field: New strategies in the control of mosquito-borne infectious diseases

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Science China Life Sciences 2025年第1期68卷 303-305页

作者： Ziqian Xu Lianpan Dai jun liu National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases (NITFID) National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and Prevention CAS Key Laboratory of Pathogen Microbiology and Immunology Institute of MicrobiologyChinese Academy of Sciences

Vector-borne viruses, transmitted among humans and animal hosts through bites of vectors such as mosquitoes and ticks,pose a great and ongoing threat to public health and biosafety(Yang et al., 2022).Among them, dengue virus-induced epidemics, have dramatically increased worldwide in recent decades. The report released by the World Health Organization(WHO) at the end of 2023 showed that dengue epidemic globally surged in2023, with the number of reported cases nearing a historical peak.

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Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

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Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi yu Faith Teo En Ning Chang liu yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

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NEW METHOD OF SIMULATING CONCENTRATED DRAIN HOLES IN SEEPAGE CONTROL ANALYSIS

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Journal of Hydrodynamics 1999年第3期11卷 27-35页

作者： Zhan Mei li, Su Bao yu , liu jun yong, Shen Zhen zhong College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, P.R.China (Received Aug.1, 1998)

In this paper, based upon the basic solution of sink, the approximate solution of single drain hole in finite elements is derived by use of the superposition principle. Then, the theoretical solution is extended to the case of some drain holes in one finite element, and the method is used in seepage control analysis with quick convergence and high accuracy. On the other hand, if the positions of the drain holes are changed, only some control factors of drain holes are changed, but the finite element grid need not to be reformed. Therefore, the method is more suitable in optimal research of seepage control.

关键词： concentrated drain hole approximate solution seepage control optimal research

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轴力对混凝土管片极限承载力影响的计算模型

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煤炭学报 2017年第1期42卷 236-241页

作者：李守巨于申刘军豪大连理工大学工业装备结构分析国家重点实验室辽宁大连116024

针对混凝土管片受压区高度小和受压区钢筋未达到屈服极限问题,提出了混凝土管片极限承载力计算模型。在轴力和弯矩共同作用下,将混凝土管片简化为偏心受压柱,建立了管片截面力平衡和弯矩平衡表达式。基于管片截面平面变形假定,建立了受... 详细信息

针对混凝土管片受压区高度小和受压区钢筋未达到屈服极限问题,提出了混凝土管片极限承载力计算模型。在轴力和弯矩共同作用下,将混凝土管片简化为偏心受压柱,建立了管片截面力平衡和弯矩平衡表达式。基于管片截面平面变形假定,建立了受压区钢筋应力与受压区高度和混凝土极限应变之间的关系。通过2个地铁隧道管片工程算例,分析讨论了轴力对受压区高度、受压区钢筋应力和管片极限承载力的影响。研究表明,混凝土管片的极限弯矩随着轴力的增加而增加;混凝土管片的最不利荷载组合为最大弯矩与最小轴力的组合。混凝土管片受压区的钢筋往往没有达到屈服极限,有时甚至处于受拉状态;现有模型假设受压区的钢筋屈服与钢筋的实际应力状态差异较大,新的计算模型能够准确计算受压区的钢筋的应力。

关键词：偏心受压混凝土管片极限承载力计算模型受压区高度钢筋应力

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