检索结果-南通市图书馆

Single Production of Charged Gauge Boson W_H^-from Left-Right Twin Higgs Model in Association with Top Quark at LHC

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第4期49卷 977-980页

作者： liu yao-Bei WANG Xue-Lei HAN Hong-Mei CAO Yong-Hua Henan Institute of Science and Technology Xinxiang 453003 China College of Physics and Information Engineering Henan Normal University Xinxiang 453007 China

The twin Higgs mechanism has recently been proposed to solve the little hierarchy problem. In the context of the left-right twin Higgs （LRTH） model, we discuss single production of the new charged gauge boson WH^- , which is predicted by the left-right twin Higgs model, in association with top quark at the CERN Large Hadron Collider （LHC）. It is found that, for a typical nonzero value of mass mixing parameter M = 150 GeV in the LRTH model, the production cross section is in the range of 3 ×10^-2 - 6.07×10^3 fb at the LHC. As long as the WH^- is not too heavy, the possible signatures of the heavy charged gauge boson might be detected at the LHC experiments.

关键词： left-right twin Higgs model cross section new charged gauge boson

Single Production of Top Quark via e^-γ Collision in Left-Right Twin Higgs Model

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2008年第8期50卷 445-450页

作者： liu yao-Bei WANG Xue-Lei CAO Jun HAN Hong-Mei School of Machinery and Electricity Henan Institute of Science and Technology Xinxiang 453003 China College of Physics and Information Engineering Henan Normal University Xinxiang 453007 China

In the context of the left-right twin Higgs （LRTH） model, we fist study single production of the standard model （SM） top quark via e-γ collisions. We find that the corrections of the LRTH model to the cross section of the process e-γ→vebt might be observed only for f ≤750 GeV and the heavy top quark mass scale M ≥500 GeV in future high energy linear e^＋e^- collider （LC） experiment with the center-of-mass （CM） energy √s = 500 GeV and a yearly integrated luminosity of ￡ = 100 fb^-1. We also consider single production of the heavy top quark T via e-γ collisions. Our numerical results show that the possible signals of the heavy top quark T might be observed via the decay channel T →Ф^＋b→tbb in future LC experiment with √s = 3 TeV and ￡ = 500 fb^-1.

关键词： left-right twin Higgs model free parameter cross section

Performance of novel 3D printing tools in removing coronary-artery calcification tissue

在线全文

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2023年第4期6卷 390-404页

作者： Chuhang Gao Zhaoju Zhu Zirui Huang liujing Chen Lihong Lu Mingcheng Fang yao liu Bingwei He College of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350001China Fujian Engineering Research Center of Joint Intelligent Medical Engineering Fuzhou 350001China Maynooth International Engineering College Fuzhou UniversityFuzhou 350001China Shengli Clinical Medical College of Fujian Medical University Fuzhou 350001China Department of Cardiology Fujian Provincial HospitalFuzhou 350001China Advanced Manufacturing Technology of Shanxi Key Lab North UniversityTaiyuan 030051China

Rotational atherectomy is an effective treatment for severe vascular calcification obstruction,and relies on high-speed grinding(typically 130,000–210,000 r/min)with miniature grinding tools to remove calcified tissue and restore blood ***,reports of intraoperative complications are common because of the grinding force,temperature,and debris directly acting on the body during the grinding process,which can easily cause damage to *** this study,three novel grinding tools were designed and fabricated and a series of experiments have been conducted to analyze the effects of tool geometry and parameters on grinding performance,that is,force,temperature,and specimen surface *** results show that these tools can effectively remove simulated calcified tissue and that they have two motions,rotation and revolution,in the *** higher rotational speeds,grinding force and temperature increase noticeably,while the amount of debris decreases *** addition,by observing the surface morphology of the specimens,we concluded that the material removal rate per unit time is influenced by both rotational speed and tool geometry,and that high rotational speed and a rough tool surface can improve the material removal rate efficiently.

关键词： Rotational atherectomy Grinding tool Grinding performance Parameter analysis

Biodegradation of methyl parathion by Acinetobacter radioresistens USTB-04

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2007年第10期19卷 1257-1260页

作者： liu Fang-yao HONG Ming-zhang liu Dan-mei LI Ya-wen SHOU Pei-shun YAN Hai SHI Guo-qing Department of Biological Science and Technology School of Applied Science University of Science and Technology Beijing Beijing 100083 China

Biodegradation of methyl parathion （MP）, a widely used organophosphorus pesticide, was investigated using a newly isolated bacterium strain Acinetobacter radioresistens USTB-04. MP at an initial concentration of 1200 mg/L could be totally biodegraded by A. radioresistens USTB-04 as the sole carbon source less than 4 d in the presence of phosphate and urea as phosphorus and nitrogen sources, respectively. Biodegradation of MP was also achieved using cell-free extract of A. radioresistens USTB-04. MP at an initial concentration of 130 mg/L was completely biodegraded in 2 h in the presence of cell-free extract with a protein concentration of 148.0 mg/L, which was increased with the increase of pH from 5.0 to 8.0. Contrary to published reports, no intermediate or final degradation metabolites of MP could be observed. Thus we suggest that the cleavage of C-C bond on the benzene ring other than P-O bond may be the biodegradation pathway of MP by A. radioresistens USTB-04.

关键词： Acinetobacter radioresistens USTB-04 biodegradation methyl parathion

Biological conversion of methane to polyhydroxyalkanoates:Current advances,challenges,and perspectives

在线全文

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2020年第2期2卷 64-71页

作者： Lu-yao liu Guo-Jun Xie De-Feng Xing Bing-Feng liu Jie Ding Nan-Qi Ren State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China

Methane emissions and plastic pollution are critical global *** biological conversion of methane to poly-b-hydroxybutyrate(PHB)not only mitigates methane emissions but also provides biodegradable polymer substitutes for petroleum-based materials used in plastics *** work provides an early overview of the methane-based PHB advances and discusses challenges and related *** advances of PHB,including PHB biosynthetic pathways,methanotrophs,bioreactors,and the performances of PHB materials are *** challenges of methane-based PHB production are discussed in detail;these include low efficiency of methanotrophs,low gas-liquid mass transfer efficiency,and poor material *** overcome these limitations,various approaches are also explored,such as feast-famine regimes,engineered microorganisms,gas-permeable membrane bioreactors,two-phase partitioning bioreactors,poly-b-hydroxybutyrate-co-hydroxyvalerate synthesis,and molecular weight manipulation.

关键词： Polyhydroxyalkanoate Methanotrophs Methane Biodegradable plastics Greenhouse gas

Unlocking iron-based mixed-phosphate cathode for sodium-ion batteries through off-stoichiometry

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第9期17卷 8119-8125页

作者： Zhaolu liu Yongjie Cao Ning Wang Hui Yang Hao Zhang Xinyue Xu Nan Wang Jie Xu yao liu Junxi Zhang Yongyao Xia Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power Shanghai University of Electric PowerShanghai 200090China Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan UniversityShanghai 200433China School of Materials Science and Engineering Anhui University of TechnologyMa’anshan 243002China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China

The off-stoichiometric iron-based phosphate(Na_(3.12)Fe_(2.44)(P_(2)O_(7))_(2),denoted as Na3.12)as a low cost and high structure stability cathode material has been widely studied for sodium-ion batteries(SIBs).However,the lower theoretical specific capacity(117 mAh·g^(-1))has seriously limited its practical *** this work,we incorporate varying proportion of sodium-iron phosphate(NaFePO_(4))into the Na3.12 to form a series of new high specific capacity mixed-phosphates Na_(3.12+x)Fe_(2.44+x)(P_(2)O_(7))_(2)(PO_(4))x cathode materials for *** optimizing the introduction amount of NaFePO_(4)into Na_(3.12),the practical reversible of Na_(3.12+x)Fe_(2.44+x)(P_(2)O_(7))_(2)(PO_(4))_(x) increased from 92 to 125.2 mAh·g^(-1).The nano-size Na5.12Fe4.44(P_(2)O_(7))_(2)(PO_(4))_(2) cathode material shows a reversible specific capacity of 125.2 mAh·g^(-1)at 0.1 C in *** at 60 C,it still exhibits a reversible specific capacity of 93.3 mAh·g^(-1)and keeps a capacity retention ratio of 87%after 3000 cycles at 20 ***,we present a novel approach to design a series of off-stoichiometric mixed-phosphates cathode materials for SIBs.

关键词： sodium-ion batteries cathode material iron-based mixed-phosphates off-stoichiometric

High performance TiP_2O_7 nanoporous microsphere as anode material for aqueous lithium-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2019年第1期62卷 118-125页

作者： Yunping Wen yao liu Duan Bin Zhuo Wang Congxiao Wang Yuliang Cao Xinping Ai Yongyao Xia Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Fudan University Hubei Key Laboratory Electrochem Power Sources College of Chemistry and Molecular Science Wuhan University

This work developed a facile way to mass-produce a carbon-coated TiP_2O_7 nanoporous microsphere(TPO-NMS) as anode material for aqueous lithium-ion batteries via solid-phase synthesis combined with spray drying method. TiP_2O_7 shows great prospect as anode for aqueous rechargeable lithium-ion batteries(ALIBs) in view of its appropriate intercalation potential of-0.6 V(vs. SCE) before hydrogen evolution in aqueous electrolytes. The resulting sample presents the morphology of secondary microspheres(ca. 20 μm) aggregated by carbon-coated primary nanoparticles(100 nm), in which the primary nanoparticles with uniform carbon coating and sophisticated pore structure greatly improve its electrochemical performance. Consequently, TPONMS delivers a reversible capacity of 90 mA h/g at 0.1 A/g, and displays enhanced rate performance and good cycling stability with capacity retention of 90% after 500 cycles at 0.2 A/g. A full cell containing TPO-NMS anode and LiMn_2O_4 cathode delivers a specific energy density of 63 W h/kg calculated on the total mass of anode and cathode. It also shows good rate capacity with56% capacity maintained at 10 A/g rate(vs. 0.1 A/g), as well as long cycle life with the capacity retention of 82% after 1000 cycles at 0.5 A/g.

关键词： aqueous lithium-ion batteries H2 evolution reaction anode TiP2O7 spray drying

M^(6)A modification in cardiovascular disease:With a focus on programmed cell death

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第5期11卷 272-284页

作者： Wen Li yao liu Ruiyan Xu Yuan Zong Lu He Jun Hu Guohua Li Institute of Cardiovascular Disease Key Laboratory for Arteriosclerology of Hunan ProvinceHunan International Scientific and Technological Cooperation Base of Arteriosclerotic DiseaseDepartment of PathophysiologyMOE Key Lab of Rare Pediatric DiseasesHengyang Medical SchoolUniversity of South ChinaHengyangHunan 421001China Department of Cardiovascular Medicine The Second Affiliated HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan 421001China Department of Obstetrics and Gynecology The First Affiliated HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan 421001China Department of Cardiovascular Surgery The Second Affiliated HospitalHengyang Medical SchoolUniversity of South ChinaHengyangHunan 421001China

N^(6)-methyladenosine(m^(6)A)methylation is one of the most predominant internal RNA modifications in eukaryotes and has become a hot spot in the field of epigenetics in recent *** diseases(CVDs)are a leading cause of death *** evidence demonstrates that RNA modifications,such as the m^(6)A modification,are associated with the development and progression of many diseases,including *** increasing body of studies has indicated that programmed cell death(PCD)plays a vital role in ***,the molecular mechanisms underlying m^(6)A modification and PCD in CVDs remain poorly ***,elaborating on the highly complex connections between the m^(6)A mechanisms and different PCD signaling pathways and clarifying the exact molecular mechanism of m^(6)A modification mediating PCD have significant meaning in developing new strategies for the prevention and therapy of *** is great potential for clinical application.

关键词： Apoptosis Autophagy Cardiovascular diseases Ferroptosis N^(6)-methyladenosine Programmed cell death Pyroptosis

Co-Production of High-Grade Dissolving Pulp,Furfural,and Lignin from Eucalyptus via Extremely Low Acid Pretreatment and Pulping Technologies and Catalysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第6期11卷 2555-2574页

作者： Chengxiang Li Yue Wu Chunhui Zhang yao liu Qixuan Lin Junli Ren State Key Laboratory of Pulp and Paper Engineering School of Light Industry and EngineeringSouth China University of TechnologyGuangzhou510640China

Hemicellulose and lignin are not reasonably utilized during the dissolved pulp preparation *** work aimed to propose a process for the co-production of dissolving pulp,furfural,and lignin from ***-grade dissolving pulp was prepared from eucalyptus using a combination of extremely low acid(ELA)pretreatment,Kraft cooking,and elementary chlorine-free(ECF)*** obtained pre-hydrolysate was catalytic conversion into furfural in a biphasic system,and lignin during Kraft cooking and ECF was *** process condition was discussed as well as the mass flow *** results showed that ELA pretreatment could effectively remove 80.1%*** with traditional hydrothermal pretreatment,the ELA pretreatment significantly increased the xylose yield from 5.05 to 14.18 g/L at 170℃ for 2 h,which had practical significance for furfural *** 82.7%furfural yield and 82.9%furfural selectivity were obtained from xylose-rich pre-hydrolysate using NaCl as a phase modifier in a biphasic system with 4-methyl-2-pentanone(MIBK)as an organic phase by ion exchange resin catalysts at 190℃ for 2 ***,the pretreated eucalyptus was subjected to Kraft cooking,and the optimal alkali amount was 14%.Then,the Kraft pulp was bleached using the O-D1-EP-D_(2) sequence,and dissolving pulp was obtained with an ISO brightness of 86.0%,viscosity of 463 mL/g,andα-cellulose content of 95.4%.The Kraft lignin which has a potential application was investigated by 2D-HSQC NMR and 31P *** results showed that the S/G ratio of Kraft lignin was 1.93,and the content of phenolic hydroxyl groups was 2.53 mmol/***,based on the above proposed process,30.5 g dissolving pulp,5.5 g furfural,and 21.2 g lignin per 100 g eucalyptus chips(oven dry)were *** research will provide new catalysis and pulping technical routes for dissolving pulp,furfural,and Kraft lignin products,which are in great demand in the chemical industry.

关键词： Eucalyptus extremely low acid pretreatment dissolving pulp furfural kraft lignin