检索结果-南通市图书馆

f.rmation of.dif.use and spark discharges between two needle electrodes with the scattering of.particles

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2024年第9期26卷 32-39页

作者： victor f.tarasenko Dmitry V BELOPLOTOV Alexei N PANCHENKO Dmitry A SOROKIN Institute of.High Current Electronics Siberian BranchRussian Academy of SciencesTomsk 634055Russia National Research Tomsk State University Tomsk 634050Russia

The development of.a nanosecond discharge in a pin-to-pin gap f.lled with air at atmospheric pressure has been studied with high temporal and spatial resolutions f.om a breakdown start to the spark *** and negative nanosecond voltage pulses with an amplitude of.tens of.kilovolts were ***-resolved images of.the discharge development were taken with a f.urchannel Intensif.ed Charge Coupled Device(ICCD)*** minimum delay between the camera channels could be as short as≈0.1 *** made it possible to study the gap breakdown process with subnanosecond *** was observed that a wide-diameter streamer develops f.om the high-voltage pointed *** ionization processes near the grounded pin electrode started when the streamer crossed half.of.the *** bridging the gap by the streamer,a dif.use discharge was *** development of.spark leaders f.om bright spots on the surf.ce of.the pointed electrodes was observed at the next *** was f.und that the rate of.development of.the spark leader is an order of.magnitude lower than that of.the wide-diameter *** thin luminous tracks were observed against the background of.a discharge plasma *** has been established that the tracks are adjacent to brightly glowing spots on the electrodes and are associated with the f.ight of.small particles.

关键词： needle electrodes short voltage pulses atmospheric air streamer breakdown dif.use and spark discharges scattering metal particles

Dynamic Characteristics in Subnanosecond Breakdown and Generation of.Supershort Avalanche Electron Beam

在线全文

学校读者我要写书评

暂无评论

高电压技术 2013年第9期39卷 2207-2215页

作者： victor f. tarasenko SHAO Tao Dmitry V. Rybka ZHANG Cheng Alexandr G. Burachenko Igor' D. Kostyrya Mikhail I. Lomaev Ping Yan Evgeni Kh. Baksht Institute of.High Current Electronics Russian Academy of Sciences Tomsk 634055 Russia Institute of.Electrical Engineering Chinese Academy of Sciences Beijing 100190 China Key Laboratory of.Power Electronics and Electric Drive Chinese Academy of Sciences Beijing 100190 China

In this paper,subnanosecond-pulse and one-nanosecond-pulse generators are used to study the breakdowns in highly overvolted gaps in atmospheric pressure *** dif.erent cathodes,we measured the applied voltage and discharge current to investigate the dynamic characteristics in the subnanosecond breakdown during the generation of.a supershort avalanche electron ***,characteristics of.dynamic displacement current are presented in the current paper,which is detected between the ionization wave f.ont and a plane *** is shown that during a subnanosecond voltage rise time,the amplitude of.the dynamic displacement current can be higher than 4 *** is demonstrated that the breakdown in the air gap is assisted by ionization processes between the ionization wave f.ont and a plane anode.

关键词：动力学特性亚纳秒电子束击穿雪崩超短纳秒脉冲发生器电离过程

Review of.supershort avalanche electron beam during nanosecond-pulse discharges in some gases

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2017年第3期2卷 105-116页

作者： victor f.tarasenko Cheng Zhang Evgenii Kh.Baksht Alexander G.Burachenko Tao Shao Dmitry V.Beloplotov Mikhail I.Lomaev Ping Yan Andrey V.Kozyrev Natalia S.Semeniuk Laboratory of.Optical Radiation of.the Institute of.High Current Electronics Tomsk 634055Russia National Research Tomsk State University Tomsk 634050Russia National Research Tomsk Polytechnic University Tomsk 634050Russia Institute of.Electrical Engineering Chinese Academy of SciencesBeijing 100190China

Supershort avalanche electron beam(SAEB)plays an important role in nanosecond-pulse *** paper aims at reviewing ex-periments results on characteritics of.SAEB and its spectra in dif.erent gases in nanosecond-pulse *** the joint experiments were carried in the Institute of.High Current Electronics of.the Russian Academy of.Sciences and the Institute of.Electrical Engineering of.the Chinese Academy of.*** these experiments,the generation of.a SAEB in Sf.6 in an inhomogeneous electric f.eld was studied on three generators with pulse rise times of.0.3,0.5 and~2 ***,the comparison of.SAEB parameters in Sf.6 with those obtained in other gases(air,nitrogen,argon,and krypton)is ***,the SAEB spectra in Sf.6 and air at pressures of.10 kPa(75 torr),and 0.1 MPa(750 torr)are reviewed and ***,1.5-D theoretical simulation of.the supershort pulse of.the f.st electron beam in a coaxial diode f.lled with Sf.6 at atmospheric pressure is *** simulation was carried out in the f.amework of.hybrid model f.r discharge and runaway electron *** above research progress can provide better understanding of.the investigation into the mechanism of.nanosecond-pulse discharges.

关键词： Runaway electrons Supershort avalanche electron beam(SAEB) Sf.6 Gas diode High pressure Simulation Hybrid model

Monogenic f.atures of.urolithiasis: A comprehensive review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of.Urology 2024年第2期11卷 169-179页

作者： Kyo Chul Koo Abdulghaf.ur Halawani victor K.f.Wong Dirk Lange Ben H.Chew Department of.Urology Yonsei University College of MedicineSeoulRepublic of Korea Department of.Urology King Abdulaziz UniversityJeddahSaudi Arabia Department of.Urological Sciences University of British ColumbiaStone Centre at Vancouver General HospitalVancouverBritish ColumbiaCanada

Objective: Urolithiasis f.rmation has been attributed to environmental and dietary f.ctors. However, evidence is accumulating that genetic background can contribute to urolithiasis f.rmation. Advancements in the identif.cation of.monogenic causes using high-throughput sequencing technologies have shown that urolithiasis has a strong heritable ***: This review describes monogenic f.ctors implicated in a genetic predisposition to urolithiasis. Peer-reviewed journals were evaluated by a PubMed search until July 2023 to summarize disorders associated with monogenic traits, and discuss clinical implications of.identif.cation of.patients genetically susceptible to urolithiasis ***: Given that more than 80% of.urolithiases cases are associated with calcium accumulation, studies have f.cused mainly on monogenetic contributors to hypercalciuric urolithiases, leading to the identif.cation of.receptors, channels, and transporters involved in the regulation of.calcium renal tubular reabsorption. Nevertheless, available candidate genes and linkage methods have a low resolution f.r evaluation of.the ef.ects of.genetic components versus those of.environmental, dietary, and hormonal f.ctors, and genotypes remain undetermined in the majority of.urolithiasis ***: The pathophysiology underlying urolithiasis f.rmation is complex and multif.ctorial, but evidence strongly suggests the existence of.numerous monogenic causes of.urolithiasis in humans.

关键词： Gene Genetic expression Inheritance pattern Urolithiasis

Methods f.r recording the time prof.le of.single ultrashort pulses of.electron beams and discharge currents in real-time mode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Voltage 2016年第1期1卷 43-51页

作者： victor f.tarasenko Dmitry V.Rybka Institute of.High Current Electronics Siberian Branch Russian Academy of SciencesTomsk 634055Russia

The collectors f.r measuring the time prof.le of.a current pulse of.the runaway electron beam that are generatedunder atmospheric pressure are described. An analysis of.changes in pulse shape depending on the bandwidth of.theregistration path with a temporal resolution of.up to 20 ps was perf.rmed. It is shown that the electron beam detectedbehind small-diameter diaphragms has a complex structure, which depends on the parameters of.the gas diode. Thereis a design of.the current shunts with a temporal resolution of.up to 100 ps in this study. Measurement techniques of.oltage pulses with subnanosecond and nanosecond duration are brief.y described.

关键词： ultrashort pulse recording

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Guest Editorial

High Voltage 2017年第2期2卷 47-48页

作者： Shao, Tao tarasenko, victor f. Tu, Xin Levko, Dmitry Wuhan University of.Hydraulic and Electrical Engineering Wuhan China Laboratory of.Optical Radiation IHCE China School of.Chemistry University of Manchester United Kingdom Department of.Aerospace Engineering and Engineering Mechanics University of Texas Austin TX United States

Much attention is being f.cused on research of.plasmas due to their unique f.atures and great potential f.r application in dif.erent areas,including surf.ce modif.cation,plasma medicine,and plasma *** the various topics related to plasma,we selected two as the main topics of.this Special Issue,namely Nanosecond-Pulse Discharges,and Plasma-Assisted Oxidation.

关键词： Oxidation potential Issue

Cerebral and muscle tissue oxygenation during exercise in healthy adults: A systematic review

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.Sport and Health Science 2024年第4期13卷 459-471,F0003页

作者： Diego Orcioli-Silva victor Spiandor Beretta Paulo Cezar Rocha Santos f.lipe Marroni Rasteiro Anita Brum Marostegan Rodrigo Vitorio Claudio Alexandre Gobatto f.lvia Barros Manchado-Gobatto Laboratory of.Applied Sport Physiology(LAf.E) School of Applied Sciences(FCA)University of Campinas(UNICAMP)Limeira 13484-350Brazil Posture and Gait Studies Laboratory(LEPLO) Institute of BiosciencesSao Paulo State University(UNESP)Rio Claro 13506-900Brazil Physical Education Department School of Technology and SciencesSao Paulo State University(UNESP)Presidente Prudente 19060-900Brazil Department of.Computer Science&Applied Mathematics Weizmann Institute of ScienceRehovot 7610001Israel Center of.Advanced Technologies in Rehabilitation Sheba Medical CenterRamat Gan 5265601Israel Department of.Sport Exercise and RehabilitationNorthumbria UniversityNewcastle upon Tyne NE18STUK

Background:Near-inf.ared spectroscopy(NIRS)technology has allowed f.r the measurement of.cerebral and skeletal muscle oxygenation simultaneously during *** this technology has been growing and is now successf.lly used in laboratory and sports settings,this systematic review aimed to synthesize the evidence and enhance an integrative understanding of.bloodﬂow adjustments and oxygen(O_(2))changes(i.e.,the balance between O_(2) delivery and O_(2) consumption)within the cerebral and muscle systems during ***:A systematic review was conducted using PubMed,Embase,Scopus,and Web of.Science databases to search f.r relevant studies that simultaneously investigated cerebral and muscle hemodynamic changes using the near-inf.ared spectroscopy system during *** review considered manuscripts written in English and available bef.re f.bruary 9,*** step of.screening involved evaluation by 2 inde-pendent authors,with disagreements resolved by a third *** Joanna Briggs Institute Critical Appraisal Checklist was used to assess the methodological quality of.the ***:Twenty studies were included,of.which 80%had good methodological quality,and involved 290 young or middle-aged *** types of.exercises were used to assess cerebral and muscle hemodynamic changes,such as cycling(n=11),treadmill(n=1),knee extension(n=5),isometric contraction of.biceps brachii(n=3),and duet swim routines(n=1).The cerebral hemodynamics anal-ysis was f.cused on the f.ontal cortex(n=20),while in the muscle,the analysis involved vastus lateralis(n=18),gastrocnemius(n=3),biceps brachii(n=5),deltoid(n=1),and intercostal muscle(n=1).Overall,muscle deoxygenation increases during exercise,reaching a plateau in voluntary exhaustion,while in the brain,oxyhemoglobin concentration increases with exercise intensity,reaching a plateau or declining at the exhaustion ***:Muscle and cerebral oxygenation respond dif.erently to exercise,with muscle

关键词： Near-inf.ared spectroscopy Hemodynamic Blood f.ow Brain Muscle metabolism

A new oxidative pathway of.nitric oxide production f.om oximes in plants

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2024年第1期17卷 178-198页

作者： Pedro Lopez-Gomez Javier Buezo Marina Urra Alf.nso Cornejo Raquel Esteban Jorge f.rnandez de los Reyes Estibaliz Urarte Estef.nia Rodriguez-Dobreva Alejandro Chamizo-Ampudia Alejandro Eguaras Sebastian Wolf.Daniel Marino victor Martinez-Merino Jose f.Moran Institute f.r Multidisciplinary Research in Applied Biology(IMAB) Department of SciencesPublic University of Navarre(UPNA)Avda.de Pamplona 12331192 MutilvaSpain Institute f.r Advanced Materials and Mathematics(INAMAT2) Department of SciencesPublic University of Navarre(UPNA)Campus de Arosadia31006 PamplonaSpain Department of.Plant Biology and Ecology University of the Basque Country(UPV/EHU)Sarriena s/nApdo.64448080 BilbaoSpain Center f.r Plant Molecular Biology(ZMBP) University of TubingenGeschwister-Scholl-Platz72074 TubingenGermany Institute of.Natural Resources and Agrobiology of.Salamanca(IRNASA) Department of Plant-Microorganism InteractionsSpanish National Research Council(CSIC)Cordel de Merinas40-5237008SalamancaSpain Department of.Biochemistry Area of Molecular BiologyVeterinary FacultyUniversity of LeonCampus de Vegazanas/n.24071 LeonSpain

Nitric oxide(NO)is an essential reactive oxygen species and a signal molecule in *** several studies have proposed the occurrence of.oxidative NO production,only reductive routes f.r NO production,such as the nitrate(NO_(3)^(-))-upper-reductase pathway,have been evidenced to date in land ***,plants grown axenically with ammonium as the sole source of.nitrogen exhibit contents of.nitrite and NO3−,evidencing the existence of.a metabolic pathway f.r oxidative production of.*** hypothesized that oximes,such as indole-3-acetaldoxime(IAOx),a precursor to indole-3-acetic acid,are intermediate oxidation products in NO *** detected the production of.NO f.om IAOx and other oximes catalyzed by peroxidase(POD)enzyme using both 4-amino-5-methylamino-2′,7′-dif.uorescein f.uorescence and *** stimulated the reaction,while superoxide dismutase inhibited ***,mouse NO synthase can also use IAOx to produce NO at a lower rate than *** provided a f.ll mechanism f.r POD-dependent NO production f.om IAOx consistent with the experimental data and supported by density f.nctional theory *** showed that the addition of.IAOx to extracts f.om Medicago truncatula increased the in vitro production of.NO,while in vivo supplementation of.IAOx and other oximes increased the number of.lateral roots,as shown f.r NO donors,and a more than 10-f.ld increase in IAOx dehydratase ***,we f.und that in vivo supplementation of.IAOx increased NO production in Arabidopsis thaliana wild-type plants,while prx33-34 mutant plants,def.ctive in POD33-34,had reduced *** data show that the release of.NO by IAOx,as well as its auxinic ef.ect,explain the superroot ***,our study reveals that plants produce NO utilizing diverse molecules such as oximes,POD,and f.avins,which are widely distributed in the plant kingdom,thus introducing a long-awaited oxidative pathway to NO production in plants.T

关键词： ammonium oxidation auxin nitric oxide oxime peroxidase root phenotype

E-beam generation in discharges initiated by voltage pulses with a rise time of.200 ns at an air pressure of.12.5-100 kPa

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2019年第4期21卷 52-60页

作者： victor tarasenko Dmitry BELOPLOTOV Mikhail LOMAEV Dmitry SOROKIN Institute of.High Current Electronics Siberian Bran ch.Russian Academy of Sciences.Tomsk&34055.Russia National Research Tomsk State University.Tomsk 634050 Russia

The ef.ect of.air pressure(12.5,25,50,and 100 kPa)on the gen eration of.runaway electron beams in a non-unif.rm electric f.eld when applying voltage pulses(~35 kV)with a rise time of.200 ns has been *** results show that the discharge has various stages:streamer,dif.use,and ***,a wide streamer develops in the gap and a dif.use discharge is f.rmed.A spark is f.rmed u 100 ns af.er the *** current pulse of.a supershort avalanche electron beam(SAEB)was measured with a collector at various pressures of.*** show that there are two modes of.generation of.run away *** an air pressure of.25-100 kPa,a single SAEB current pulse with a f.ll width at half.maximum(f.HM)of.120-140 ps is *** the air pressure of.12.5 kPa,two current pulses of.the electron beam are *** of.the f.rst and second current pulses are ul40ps and u300 ps,*** current pulse amplitude of.the second electron beam is higher than that of.the f.rst one,but the electron energy is less.

关键词： dif.use discharge runaway electrons streamer breakdown displacement current