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Evaluation of five antibiotics on larval gut bacterial diversity of Plutella xylostella （Lepidoptera： Plutellidae）

Insect Science 2015年第5期22卷 619-628页

作者： Xiao-Li Lin Zhi-Wei Kang Qin-jian Pan tong-Xian liu State Key Laboratory of Crop Stress Biology in Arid Areas and Key Laboratory of Northwest Loess Plateau Crop Pest Managementof Ministry of Agriculture Northwest A&F University Yangling Shaanxi 712100 China

Larvae of the diamondback moth, Plutella xylostella L. （Lepidoptera： Plutelli- dae）, have rich microbial communities inhabiting the gut, and these bacteria contribute to the fitness of the pest. In this study we evaluated the effects of five antibiotics （rifampicin, ampicillin, tetracycline, streptomycin sulfate and chloramphenicol） on the gut bacterial di- versity ofP xylostella larvae. We screened five different concentrations for each antibiotic in a leaf disc assay, and found that rifampicin and streptomycin sulfate at 3 mg/mL signif- icantly reduced the diversity of the bacterial community, and some bacterial species could be rapidly eliminated. The number of gut bacteria in the rifampicin group and strepto- mycin sulfate group decreased more rapidly than the others. With the increase of antibiotic concentration, the removal efficiency was improved, whereas toxic effects became more apparent. All antibiotics reduced larval growth and development, and eventually caused high mortality, malformation of the prepupae, and hindered pupation and adult emergence. Among the five antibiotics, tetracycline was the most toxic and streptomycin sulfate was a relatively mild one. Some dominant bacteria were not affected by feeding antibiotics alone. Denaturing gradient gel electrophoresis graph showed that the most abundant and diverse bacteria in P xylostella larval gut appeared in the cabbage feeding group, and diet change and antibiotics intake influenced gut flora abundance. Species diversity was significantly reduced in the artificial diet and antibiotics treatment groups. After feeding on the artificial diet with rifampicin, streptomycin sulfate and their mixture for 10 days, larval gut bacteria could not be completely removed as detected with the agarose gel electrophoresis method.

关键词： antibiotics endosymbiont gut bacteria microbes PCR-DGGE

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Influence of gravel content and cement on conglomerate fracture

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Petroleum Science 2023年第3期20卷 1724-1741页

作者： Zhen-Xin Zhang Hong-Kui Ge Jjian-Bo Wang jian-tong liu Dun-Qing liu Wei-Wei Teng Ying-Hao Shen Unconventional Oil and Gas Technology Research Institute China University of Petroleum(Beijing)Beijing102249China Department of Petroleum Engineering China University of Petroleum(Bejing)at KaramayKaramay83400oXinjiangChina CNPC Xinjiang Oilfield Company Karamay834000XinjiangChina

Tight reservoirs are typically developed by horizontal wells and multi-stage hydraulic *** conglomerate reservoir is one type of tight reservoirs,which is different from homogeneous rock,such as tight *** is because that the existence of gravels makes conglomerate have strong ***,it is difficult to grasp the fracture mechanism and the law of fracture propagation of conglomerate,which limits the efficient development of the conglomerate *** this paper,the fracture characteristics and factors influencing the fracturing of Mahu conglomerate were studied by uniaxial compression,acoustic emission monitoring and X-ray computed tomography(CT)scanning *** results show that the fracture characteristics of conglomerates are influenced by the gravel content and *** conglomerate in the study area is mainly divided into carbonate cemented conglomerate and clay cemented *** fracture complexity of carbonate cemented conglomerate first increases and then decreases with increasing gravel ***,for clay cemented conglomerates,the fracture complexity increases over the gravel *** crack development stress is a significant parameter in the crack assessment of *** study is useful to understand the influence of meso-fabric characteristics of conglomerates on their fracturing and crack evolution and guides the design of hydraulic fracturing.

关键词： Conglomerate Mechanical property Fracture characteristics Crack evolution

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Effect of gravel on rock failure in glutenite reservoirs under different confining pressures

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Petroleum Science 2023年第5期20卷 3022-3036页

作者： jian-tong liu jian-Bo Wang Hong-Kui Ge Wei Zhou Bei-Bei Chen Xiao-Di Li Xian-Jie Xue Sen-Lin Luo Department of Petroleum Engineering China University of Petroleum(Beijing)at KaramayKaramay834000XinjiangChina Unconventional Oil and Gas Institute China University of Petroleum(Beijing)Beijing102249China Xinjiang Oilfield Company China National Petroleum CorporationKaramay834000XinjiangChina

Due to the existence of gravel,glutenite is heterogeneous and different from fine-grained rocks such as sandstone and shale in *** fully understand the effect of gravel on failure mode in glutenite,we performed triaxial compression tests on different *** results indicate that failure modes of glutenite are complex due to the existence of *** different confining pressures,three failure modes were *** first failure mode,a tensile failure under uniaxial compression,produces multiple tortuous longitudinal *** this failure mode,the interaction between gravels provides the lateral tensile stress for rock *** second failure mode occurs under low and medium confining pressure and produces a crack band composed of micro-cracks around *** failure mode conforms to the Mohr-Coulomb criterion and is generated by shear *** this failure mode,shear dilatancy and shear compaction may occur under different confining pressures to produce different crack band *** the second failure mode,gravel-induced stress concentration produces masses of initial micro-cracks for shear cracking,and gravels deflect the fracture *** a result,the fracture is characterized by crack bands that are far broader than in fine-grained *** third failure mode requires high confining pressure and produces disconnected cracks around gravels without apparent crack *** this failure mode,the gravel rarely breaks,indicating that the formation of these fractures is related to the deformation of the *** third failure mode requires lower confining pressure in glutenite with weak cement and matrix ***,unlike fine-grained rocks,the failure mode of glutenite is not only controlled by confining pressure but also by the *** failure of glutenite is characterized by producing cracks around *** cracks are produced by different mechanisms and distributed in different manners under different confining

关键词： Glutenite Heterogeneity Failure mode Triaxial compression test Shear dilatancy Shear compaction

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Ash removal from inferior coal via ammonium fluoride roasting and simultaneous yield of white carbon black

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International Journal of Mining Science and Technology 2024年第2期34卷 261-279页

作者： Xuqin Duan Shuaiyu Lu Yuxiao Fu Jiazhe Zhang tong liu jian Ma School of Civil and Resource Engineering University of Science&Technology BeijingBeijing 100083China State Key Laboratory for Efficient Mining of Metal Mines University of Science&Technology BeijingBeijing 100083China China Coal Processing and Utilizaiton Association Beijing 100013China

The quality upgrading and deashing of inferior coal by chemical method still faces great *** dangers of strong acid,strong alkali,waste water and exhaust gas as well as high cost limit its industrial *** paper systematically investigates the ash reduction and desilicification of two typical inferior coal utilizing ammonium fluoride roasting *** the optimal conditions,for fat coal and gas coal,the deashing rates are 69.02%and 54.13%,and the desilicification rates are 92.64%and 90.27%,*** molar dosage of ammonium fluoride remains consistent for both coals;however,the gas coal,characterized by a lower ash and silica content(less than half that of the fat coal),achieves optimum deashing effect at a reduced time and *** majority of silicon in coal transforms into gaseous ammonium fluorosilicate,subsequently preparing nanoscale amorphous silica with a purity of 99.90%through ammonia *** of the fluorine in deashed coal are assigned in inorganic minerals,suggesting the possibility of further fluorine and ash removal via *** research provides a green and facile route to deash inferior coal and produce nano-scale white carbon black simultaneously.

关键词： Inferior coal Deashing treatment Silicon recycling Ammonium fluoride roasting White carbon black

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High-efficiency preparation of multifunctional conjugated electrospun graphene doped PVDF/CF yarns for energy harvesting and human movement monitoring in TENG textile

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Nano Research 2024年第5期17卷 4478-4488页

作者： Ting Yang Chengwei Wan Xiaoyu Zhang tong liu Li Niu jian Fang Yuqing liu College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123China

Portable power is an effective solution to realize self-powered sensors for wearable devices,promoting future sustainable ***-based triboelectric nanogenerators(M-TENGs)have emerged as a promising technology for harvesting biomechanical energy from human motion owing to their advantages,such as simple structure,lightweight design,and efficient energy ***,the poor durability,low adaptability,and un-washability of two-dimensional membrane materials have largely hindered their application in wearable *** this study,we propose a sheath-core polyvinylidene fluoride(PVDF)/graphene(G)-carbon fiber(CF)yarn fabricated via conjugate electrospinning,comprising a commercial CF core and an electrospun graphene-doped PVDF sheath,which improves the fatigue resistance of electrospun nanofiber films under prolonged friction and keeps a high degree of *** resulting electronic textile,woven with the large-scale electrospun PVDF/G-CF yarn,demonstrates a remarkable power density of 25.5 mW·m^(-2).The tight distribution of PVDF/G nanofibers on the textile surface ensures excellent softness,washability,and ***,the electrospun PVDF/G-CF textile exhibits significant potential in pressure sensing,self-powered operation,and motion detection,making it highly suitable for wearable electronics applications.

关键词： yarn-based triboelectric nanogenerator(TENG) graphene polyvinylidene fluoride(PVDF) conjugated-electrospinning multifunctional

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Boosting zinc anode durability through synergistic inner Helmholtz plane and interfacial electric field regulation

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Science Bulletin 2024年第13期69卷 2025-2029页

作者： Hao Tan Chao Meng tong Sun Xing-Long Wu Hong liu jian-Jun Wang State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China MOE Key Laboratory for UV Light-Emitting Materials and Technology Department of PhysicsNortheast Normal UniversityChangchun 130024China Jinan Institute of Quantum Technology Jinan BranchHefei National LaboratoryJinan 250101China Shenzhen Research Institute Shandong UniversityShenzhen 518057China

As the need for energy storage devices escalates,aqueous zincion batteries(ZIBs)have risen as a promising alternative to the widely used Li-ion batteries,offering intrinsic safety,environmental compatibility,and cost advantages,positioning them as attractive energy storage systems for the future[1,2].However,challenges such as dendrite growth on Zn anodes,stemming from uneven electric fields on the surface and active water side reactions,compromise cycling stability and lifespan,posing significant hurdles for the practical application of ZIBs[3,4].To mitigate these issues,strategies like electrolyte optimization,artificial solid electrolyte interphase(SEI)layers,and current collector modifications have been proposed[5,6].Nevertheless,most long-cycle experiments are conducted at low current densities and deposition capacities,with high current density and capacity operations typically lasting less than 1000 h[7].

关键词： electrolyte durability offering

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损失规避型零售商库存共享策略

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计算机集成制造系统 2017年第9期23卷 2012-2019页

作者：蹇明刘同西南交通大学交通运输与物流学院四川成都610031

为解决实际决策的偏差问题,研究了具有损失规避决策偏好的零售商之间的库存共享策略。分析了零售商在面临缺货情况时的决策问题,讨论了提前期与零售商决策之间的关系,研究了零售商选择向同级零售商提出转运策略时提前期的取值范围。将... 详细信息

为解决实际决策的偏差问题,研究了具有损失规避决策偏好的零售商之间的库存共享策略。分析了零售商在面临缺货情况时的决策问题,讨论了提前期与零售商决策之间的关系,研究了零售商选择向同级零售商提出转运策略时提前期的取值范围。将零售商损失规避偏好引入库存共享模型,研究了两零售商之间的转运策略,分析了最优转运数量,研究了零售商在损失规避情况下的期望转运数量随损失规避系数的变化关系以及均衡转运价格随损失规避系数的变化情况。通过数值分析验证了转运数量以及均衡价格随损失规避系数的变化情况。

关键词：提前期库存共享转运价格转运数量损失规避

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Biophoton signaling in mediation of cell-to-cell communication and radiation-induced bystander effects

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Radiation Medicine and Protection 2024年第3期5卷 145-160页

作者： jian tong School of Public Health Soochow UniversitySuzhou 215123China

This paper presents a comprehensive overview of the historical trajectory and development in biophoton studies over the past 100 years,with a particular focus on the recent progress regarding the pivotal role of biophoton in mediating radiation-induced bystander effects(RIBE).The exploration of biophoton mystery starts from the initial observation of mitogenetic radiation and continues to develop to the contemporary science of *** properties and underlying mechanisms of biophoton emission are described with illustrative examples from diverse biological systems such as plants,animals and *** conclusive evidence of cell-to-cell commu-nication facilitated by biophoton signaling is presented,followed by an elaborate interpretation of potential mechanisms through which biophoton mediates *** engagement of mitochondria and exosomes in this process is extensively clarified,by highlighting their significant roles in biophoton-mediated *** advances in biophoton research in respect of bystander response to ionizing radiation may offer profound insights into radiobiology and provide for possible future applications as well in radiation medicine and protection.

关键词： Biophoton Radiation-induced bystander effect Ionizing radiation Cell-to-cell communication Mitochondrion Exosome

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Upconversion luminescence and temperature sensing performance of Er^(3+) ions doped self-activated KYb(MoO_(4))_(2) phosphors

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Journal of Rare Earths 2024年第8期42卷 1507-1513,I0004页

作者： Ye tong Wenpeng liu Shoujun Ding School of Microelectronics and Data Science Anhui University of TechnologyMaanshan243002China Advanced Laser Technology Laboratory of Anhui Province Hefei230037China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei230031China

In this work,a series of self-activated KYb(MoO_(4))_(2) phosphors with various x at% Er^(3+) doping concentrations(x=0.5,1,3,5,8,10,15) was synthesized by the solid-state reaction *** phase structure of the as-prepared samples was analyzed by X-ray diffraction(XRD),XRD Rietveld refinement and Fourier transform infrared(FT-IR) *** as-prepared samples retain the orthorhombic structure with space group of Pbcn even Er^(3+) doping concentration up to 15 at%.High-purity upconversion(UC) green emission with green to red intensity ratio of 55 is observed from the as-prepared samples upon the excitation of 980 nm semiconductor laser and the optimum doping concentration of Er^(3+) ions in the self-activated KYb(MoO_(4))_(2) host is revealed as 3 at%.The strong green UC emission is confirmed as a two-photon process based on the power-dependent UC *** addition,the fluorescence intensity ratios(FIRs) of the two thermally-coupled energy levels,namely ^(2)H_(11/2) and ^(4)S_(3/2).of Er^(3+) ions were investigated in the temperature region 300-570 K to evaluate the optical temperature sensor behavior of the *** maximum relative sensitivity(S_(R)) is determined to be 0.0069 K^(-1) at300 K and the absolute sensitivity(S_(A)) is determined to be 0.0126 K^(-1) at 300 *** S_(A) of self-activated KYb(MoO_(4))2:Er^(3+)is almost twice that of traditional KY(MoO_(4))2:Er^(3+)/Yb^(3+)codoping *** results demonstrate that Er^(3+) ions doped self-activated KYb(MoO_(4))2 phosphor has promising application in visible display,trademark security and optical temperature sensors.

关键词： Er^(3+)ions doped KYb(MoO_(4))_(2) Self-activated phosphors Upconversion luminescence Solid-state reaction method Optical temperature sensors Rare earths

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Advancements in Humanoid Robots: A Comprehensive Review and Future Prospects

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IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 301-328页

作者： Yuchuang tong Haotian liu Zhengtao Zhang IEEE CAS Engineering Laboratory for Intelligent Industrial Vision Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

This paper provides a comprehensive review of the current status, advancements, and future prospects of humanoid robots, highlighting their significance in driving the evolution of next-generation industries. By analyzing various research endeavors and key technologies, encompassing ontology structure,control and decision-making, and perception and interaction, a holistic overview of the current state of humanoid robot research is presented. Furthermore, emerging challenges in the field are identified, emphasizing the necessity for a deeper understanding of biological motion mechanisms, improved structural design,enhanced material applications, advanced drive and control methods, and efficient energy utilization. The integration of bionics, brain-inspired intelligence, mechanics, and control is underscored as a promising direction for the development of advanced humanoid robotic systems. This paper serves as an invaluable resource, offering insightful guidance to researchers in the field,while contributing to the ongoing evolution and potential of humanoid robots across diverse domains.

关键词： Future trends and challenges humanoid robots human-robot interaction key technologies potential applications

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