检索结果-南通市图书馆

Journal of Environmental Sciences 2022年第12期34卷 1-13页

作者： Zhongshan Chen Xuan He Qian Li Hui Yang Yang Liu Lining Wu Zhixin Liu Baowei Hu Xiangke Wang School of Life Science Shaoxing UniversityShaoxing 312000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206Chin

For the continuous utilization of nuclear energy and efficient control of radioactive pollution, low-cost materials with high efficient U(VI) removal are of great importance. In this study, low temperature plasma method was applied for the successful modification of Ophosphorylethanolamine(O-PEA) on the porous carbon materials. The produced materials(Cafe/O-PEA) could adsorb U(VI) efficiently with the maximum sorption capacity of 648.54mg/g at 1 hr, T=298 K, and p H=6.0, much higher than those of most carbon-based composites. U(VI) sorption was mainly controlled by strong surface complexation. From FTIR,SEM-EDS and XPS analyses, the sorption of U(VI) was related to the complexation with-NH2, phosphate and-OH groups on Cafe/O-PEA. The low temperature plasma method was an efficient, environmentally friendly and low-cost method for surface modification of materials for the effective enrichment of U(VI) from aqueous solutions.

关键词： U(Ⅵ) Coffee residue Porous carbon low-temperature plasma modification

low-temperature plasma Promotes Fibroblast Proliferation in Wound Healing by ROS-activated NF-κB Signaling Pathway

在线全文

学校读者我要写书评

暂无评论

Journal of Huazhong University of Science and Technology(Medical Sciences) 2018年第1期38卷 107-114页

作者： Xing-min SHI Gui-min XU Guan-jun ZHANG Jin-ren LIU Yue-ming WU Ling-ge GAO Yang YANG Zheng-shi CHANG Cong-wei YAO Key Laboratory of Environment and Genes Related to Diseases Ministry of EducationSchool of Public HealthXi'an Jiaotong UniversityXi'an 710061China State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi'an 710049China

low-temperature plasma(LTP)has shown great promise in wound healing,although the underlying mechanism remains poorly *** the present study,an argon atmospheric pressure plasma jet was employed to treat L929 murine fibroblasts cultured in vitro and skin wounds in BALB/c *** in vitro analysis revealed that treatment of fibroblasts with LTP for 15 s resulted in a significant increase in cell proliferation,secretion of epidermal growth factor(EGF)and transforming growth factor-β1(TGF-β1),production of intracellular reactive oxygen species(ROS),and the percentage of cells in S phase,protein expression of phosphorylated p65(P-p65)and cyclin D1,but a noted decrease in the protein expression of inhibitor kappa B(IκB).The in vivo experiments demonstrated that 30-s LTP treatment enhanced the number of fibroblasts and the ability of collagen synthesis,while 50-s treatment led to the opposite *** results suggested that LTP treatment promotes the fibroblast proliferation in wound healing by inducing the generation of ROS,upregulating the expression of P-p65,downregulating the expression of IκB,and activating the NF-κB signaling pathway and consequently altering cell cycle progression(increased DNA synthesis in S phage).

关键词： low-temperature plasma fibroblast proliferation NF-κB signaling pathway cell cycle reactive oxygen species

low-temperature plasma Induced Grafting of 2-Methacryloyloxyethyl Phosphorylcholine onto Poly(tetrafluoroethylene) Films

在线全文

学校读者我要写书评

暂无评论

Transactions of Tianjin University 2009年第5期15卷 355-359页

作者：赵蕴慧王芬何祥鹏 School of Material Science and Engineering Tianjin University

Modification of poly(tetrafluoroethylene)(PTFE) films with 2-methacryloyloxyethyl phosphorylcholine(MPC) was performed by low-temperature plasma treatment and grafting *** properties of PTFE were characterized by attenuated total reflectance Fourier transform infrared(ATR-FTIR) spectra,X-ray photoelectron spectroscopy(XPS) ,and static contact *** results show that MPC has been grafted onto PTFE film surface *** angle for the modified PTFE films in the water decreased from 108°to 58.25°,while surface energy increased from 17.52 mN/m to 45.47 mN/*** effects of plasma treatment time,monomer concentration and grafting time on degree of grafting were *** the meanwhile,blood compatibility of the PTFE films was studied by checking thrombogenic time of blood plasma.

关键词： low-temperature plasma poly(tetrafluoroethylene) (PTFE) grafting 2-methacryloyloxyethyl phosphorylcholine (MPC)

Interaction of supersonic molecular beam with low-temperature plasma

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第6期29卷 349-357页

作者： Dong Liu Guo-Feng Qu Zhan-Hui Wang Hua-Jie Wang Hao Liu Yi-Zhou Wang Zi-Xu Xu Min Li Chao-Wen Yang Xing-Quan Liu Wei-Ping Lin Min Yan Yu Huang Yu-Xuan Zhu Min Xu Ji-Feng Han Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologyCollege of PhysicsSichuan UniversityChengdu 610064China Southwestern Institute of Physics Chengdu 610041China

The interaction between the supersonic molecular beam(SMB)and the low-temperature plasma is a critical issue for the diagnosis and fueling in the Tokamak *** this work,the interaction process between the argon SMB and the argon plasma is studied by a high-speed camera based on the Linear Experimental Advanced Device(LEAD)in Southwestern Institute of Physics,*** is found that the high-density SMB can extinct the plasma temporarily and change the distribution of the plasma density significantly,while the low-density SMB can hardly affect the distribution of plasma *** can be used as an effective diagnostic technique to study the evolution of plasma density in the interaction between the SMB and ***,the related simulation based on this experiment is carried out to better understand the evolution of electron density and ion density in the *** simulation results can be used to analyze and explain the experimental results well.

关键词： supersonic molecular beam low-temperature plasma emission electron density diagnosis highspeed camera

The Feasibility of Applying AC Driven low-temperature plasma for Multi-Cycle Detonation Initiation

在线全文

学校读者我要写书评

暂无评论

plasma Science and Technology 2016年第11期18卷 1110-1115页

作者： ZHENG Dianfeng Department of Aeronautics and Astronautics School of Engineering Peking University Beijing 100871 China

Ignition is a key system in pulse detonation engines （PDE）. As advanced ignition methods, nanosecond pulse discharge low-temperature plasma ignition is used in some combustion systems, and continuous alternating current （AC） driven low-temperature plasma using dielectric barrier discharge （DBD） is used for the combustion assistant. However, continuous AC driven plasmas cannot be used for ignition in pulse detonation engines. In this paper, experimental and numerical studies of pneumatic valve PDE using an AC driven low-temperature plasma igniter were described. The pneumatic valve was jointly designed with the low-temperature plasma igniter, and the numerical simulation of the cold-state flow field in the pneumatic valve showed that a complex flow in the discharge area, along with low speed, was beneficial for successful ignition. In the experiments ethylene was used as the fuel and air as oxidizing agent, ignition by an AC driven low-temperature plasma achieved multi-cycle intermittent detonation combustion on a PDE, the working frequency of the PDE reached 15 Hz and the peak pressure of the detonation wave was approximately 2.0 MPa. The experimental verifications of the feasibility in PDE ignition expanded the application field of AC driven low-temperature plasma.

关键词： pulse detonation engine low-temperature plasma ignition detonation combustion

Remediation of soil heavily polluted with polychlorinated biphenyls using a low-temperature plasma technique

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2014年第2期8卷 277-283页

作者： Xiuhua LI Haibo ZHANG Yongming LUO Ying TENG Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China

Polychlorinated biphenyls （PCBs） were removed by low-temperature plasma technique （dielectric barrier discharge） from heavily polluted soil and their intermediate products were analyzed. The removal rate ranged from 40.1 to 84.6% by different treatments, and they were also influenced significantly （P 〈 0.01） by soil particle-size, electric power, gas flow rate and reaction time. The optimal reaction conditions of PCB removal from the soil were obtained experimentally when soil particle-size, electrical power, flow rate and reaction time were 5-10mm, 21w, 120mL. rain and 90rain, respectively. However, decreasing electrical power, flow rate and reaction time to 18 w, 60 mL. min- and 60 min respectively were also acceptable in view of the cost of remediation. This technique was characterized by the additional advantage of thorough oxidation of PCBs in the soil, with no formation of intermediate products after reaction. The technique therefore shows some promise for application in the remediation of soils contaminated with persistent organic pollutants in brown field sites in urban areas.

关键词： polychlorinated biphenyls low-temperature plasma soil contamination intermediate products

A review of low-temperature plasma-assisted machining:from mechanism to application

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2023年第1期18卷 35-53页

作者： Jiyu LIU Yuheng LI Yang CHEN Yuyang ZHOU Shuaishuai WANG Zizhen YUAN Zhuji JIN Xin LIU Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education Dalian University of TechnologyDalian 116024China

Materials with high hardness,strength or plasticity have been widely used in the fields of aviation,aerospace,and military,among ***,the poor machinability of these materials leads to large cutting forces,high cutting temperatures,serious tool wear,and chip adhesion,which affect machining ***-temperature plasma contains a variety of active particles and can effectively adjust material properties,including hardness,strength,ductility,and wettability,significantly improving material *** this paper,we first discuss the mechanisms and applications of low-temperature plasma-assisted *** introducing the characteristics,classifications,and action mechanisms of the low-temperature plasma,we describe the effects of the low-temperature plasma on different machining processes of various difficult-to-cut *** low-temperature plasma can be classified as hot plasma and cold plasma according to the different equilibrium *** plasma improves material machinability via the thermal softening effect induced by the high temperature,whereas the main mechanisms of the cold plasma can be summarized as chemical reactions to reduce material hardness,the hydrophilization effect to improve surface wettability,and the Rehbinder effect to promote *** addition,hybrid machining methods combining the merits of the low-temperature plasma and other energy fields like ultrasonic vibration,liquid nitrogen,and minimum quantity lubrication are also described and ***,the promising development trends of low-temperature plasma-assisted machining are presented,which include more precise control of the heat-affected zone in hot plasma-assisted machining,cold plasma-assisted polishing of metal materials,and further investigations on the reaction mechanisms between the cold plasma and other materials.

关键词： low-temperature plasma difficult-to-cut material machinability hydrophilization effect Rehbinder effect

Experimental Research of Inactivation Effect of low-temperature plasma on Bacteria

在线全文

学校读者我要写书评

暂无评论

plasma Science and Technology 2006年第5期8卷 569-572页

作者：石兴民袁育康孙岩洲袁网彭风玲邱毓昌 School of Medicine Xi'an Jiaotong University Xi'an 710061 China School of Electrical Engineering Xi'an Jiaotong University Xi'an 710049 China

The killing logarithms index in killing a vegetative form in an explosure of about 90s and a spore in an explosure of about 120s, by using a low-temperature plasma produced by dielectric barrier discharge （DBD）, reached 5. The speed in killing the strains tested, by using a low-temperature plasma, was the highest with E. Coli, then S. Aureus and B. Subtilis var niger spore. The results of the scanning electron microscope showed that the low-temperature plasma destroyed the outer structure of the bacteria and that the vegetative form was more susceptible to the inactivation effect of the low-temperature plasma than was the spore. This indicated that the effects of the high voltage and high velocity particle flow, in plasma, penetrating through the outer structure of the bacteria might play a dominant role during the inactivation of the bacteria.

关键词： dielectric barrier discharge low-temperature plasma vegetative form spore

Study on Free Surface and Channel Flow Induced by low temperature plasma via Lattice Boltzmann Method

在线全文

学校读者我要写书评

暂无评论

plasma Science and Technology 2016年第3期18卷 331-336页

作者：弯港金涌李海元栗保明 National Key Laboratory of Transient Physics Nanjing University of Science and Technology

Active boundary layer flow control and boundary layer manipulation in the channel flow that was based on low temperature plasma were studied by means of a lattice Boltzmann method. Two plasma actuators were placed in a row to obtain the influence rule of their separation distance on the velocity profile at three locations and maximum velocity in the flow field. Two plasma actuators were placed symmetrically inside a channel to examine the effect of channel height and voltage on the velocity profile and flow rate. It was found that the channel height controls the distribution of flow velocity, which affected the flow rate and its direction. Increasing plasma voltage had a negative effect on the flow rate due to the generation of a larger and stronger flow vortex.

关键词： lattice Boltzmann method (LBM) low-temperature plasma induced flow

Effect of SBA-15-CEO on properties of potato starch film modified by low-temperature plasma

在线全文

学校读者我要写书评

暂无评论

Food Bioscience 2023年第1期51卷 1128-1138页

作者： Yanli Guo Meng Cheng Yingjun Cui Rongfei Zhang Zitong Zhao Xiangyou Wang Shuaiyu Guo School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo255000China

In order to improve the properties of potato starch film,cinnamon essential oil(CEO)encapsulated with mesoporous nano-silica(SBA-15)was added to the film and the potato starch dispersion was modified by lowtemperature plasma(LTP).The effects of SBA-15-CEO on the physical,mechanical,antioxidant and antifungal properties of the film were *** revealed that the addition of SBA-15-CEO significantly improved the film *** water vapor transmission rate(WVTR)decreased from 14.01g/(m^(2)·h)to 12.75g/(m^(2)·h)with increasing concentrations of *** 0.4 g/100 mL SBA-15-CEO was added,the oxygen transmittance rate(OTR)decreased from 8.113×10^(-15)cm^(2)s^(-1)Pa^(-1)to 3.017×10^(-15)cm^(2)s^(-1)Pa^(-1).The tensile strength(TS)and elongation at break(EB)reached maximum values when the dosage of SBA-15-CEO was 0.4 g/100 *** zeta potential(ZP)of the colloid solutions initially decreased and subsequently increased,corresponding to a minimum colloid solution ZP(0.947 mV)at 0.4 g/100 mL SBA-15-CEO,and a maximum(2.55 mV)at 0.8 g/100 mL ***,the films with SBA-15-CEO exhibited antifungal and antioxidant ***,the aggregation of SBA-15-CEO decreased with the addition of 0.4 g/100 mL,and the appearance of irregular and rough fractured surfaces were also *** transform infrared(FTIR)spectroscopy revealed SBA-15-CEO to increase the hydrogen bonding of the *** work proved the potential of LTP-PS/SBA-15-CEO(i.e.,potato starch/SBA-15-CEO film modified by LTP)as an antioxidant and antifungal packaging material.

关键词： SBA-15-CEO Potato starch low-temperature plasma Film Modification