检索结果-南通市图书馆

On the functions of astrocyte-mediated neuronal.sl.w inward currents

Neural.Regeneration Research 2024年第12期19卷 2602-2612页

作者： Bal.zs pál Department of physiol.gy Faculty of MedicineUniversity of DebrecenDebrecenHungary

Sl.w inward currents are known as neuronal.excitatory currents mediated by gl.tamate rel.ase and activation of neuronal.extra synaptic N-met hyl.D-aspartate receptors with the contribution of *** events are significantl. sl.wer than the excitatory postsynaptic *** of sl.w inward currents are determined by seve ral.factors incl.ding the mechanisms of astrocytic activation and gl.tamate rel.ase,as wel. as the diffusion pathways from the rel.ase site towards the extra synaptic recepto *** are stimul.ted by neuronal.network activity,which in turn excite neurons,forming an astrocyte-neuron feedback *** as a consequence of brain edema,astrocytic swel.ing can al.o induce sl.w inward currents under pathol.gical.*** is a growing body of evidence on the rol.s of sl.w inward currents on a singl. neuron or l.cal.network *** events often occur in synchro ny on neurons l.cated in the same astrocytic *** synchronization of neuronal.excitabil.ty,sl.w inward currents al.o set synaptic strength via el.citing timing-dependent synaptic *** addition,sl.w inward currents are al.o subject to non-synaptic pl.sticity triggered by l.ng-l. sting stimul.tion of the excitatory *** note,there might be important regionspecific differences in the rol.s and actions triggering sl.w inward *** greater networks,the pathophysiol.gical.rol.s of sl.w inward currents can be better understood than physiol.gical.*** inward currents are identified in the pathophysiol.gical.background of autism,as sl.w inward currents drive earl. hypersynchrony of the neural.*** inward currents are significant contributors to paroxysmal.depol.rizational.shifts/interictal.*** events are rel.ted to epil.psy,but al.o found in Al.heimer's disease,parkinson's disease,and stroke,l.ading to the decl.ne of cognitive *** with features overl.pping with sl.w inward currents(excitatory,N-methyl.Dasp

关键词： astrocyte cortical.spreading depol.rization gl.otransmission gl.tamate neural.synchronization NMDA receptor paroxysmal.depol.rizational.shift sl.w inward current

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chronic active and atrophic gastritis as significant contributing factor to the devel.pment of gastric cystica profunda

引用

Worl. Journal.of Gastroenterol.gy 2024年第17期30卷 2308-2310页

作者： Veronika papp pál.Mihel.er Department of Surgery Transplantation and GastroenterologySemmelweis UniversityBudapest 1082Hungary

Gastric cystica profunda(GCp)is an uncommon but underestimated gastric *** precancerous potential.determines its *** addition to previous mucosa injury due to operations,biopsy or pol.pectomy,chronic active and atrophic gastritis may al.o l.ad to the devel.pment of *** careful.y examining the stomach and taking biopsy sampl.s from the susceptibl. regions,the stage of atrophy can be *** atrophic gastritis is a risk factor for cancer evol.ement and it can al.o contribute to GCps *** frequentl. occur cl.se to earl. gastric cancers(EGCs)or EGC can arise from the cystic *** resection is an effective and minimal.y invasive treat-ment in GCp.

关键词： Gastric cystica profunda Chronic active gastritis Atrophic gastritis Operative l.nk for Gastritis Assessment staging Earl. gastric cancer Endoscopic resection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of radiative l.ss mechanisms on FIR thermometric parameters of Nd^(3+)-doped l.thium tel.urite gl.sses

引用

Journal.of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.Y.Morassuti A.p.l.Sil.a l.A.O.Nunes S.M.l.ma l.H.C.Andrade Optical.and photothermal.Spectroscopy Group(GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information Technol.gy Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of physics of São Carl.s University of São PauloSão CarlosSPBrazil

Nd^(3+)-doped tel.urite gl.sses are promising material. for thermometers based on the fl.orescence intensity ratio(FIR)***,at high Nd^(3+)concentrations,energy transfer(ET)processes such as optical.reabsorption and cross-rel.xation can affect the Nd^(3+)emission,which has been l.ttl. expl.red in the ***,the present work investigated the use of Nd^(3+)-doped tel.urite gl.ss(sampl.s doped with Nd^(3+)at 0.2 mol.,0.5 mol.,2.0 mol.,and 4.0 mol.)in fl.orescence thermometers,in the temperature range from 299 to 371 *** resul.s indicate a strong dependence of the FIR parameters on the Nd^(3+)concentration,due to changes in the emission band profil.s caused by optical.reabsorption of the Nd^(3+)emissions and cross-rel.xation processes.A decrease of the rel.tive sensitivity of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for sampl.s doped with higher amounts of Nd^(3+).The maximum rel.tive sensitivity at 299 K is 3.00%/K,which is the highest val.e among the reported Nd^(3+)ions.

关键词： Nd^(3+)-doped tel.urite gl.ss Fl.orescence intensity ratio Optical.thermometry Judd-Ofel. Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

System integration anal.sis of a zeol.te 13x thermal.energy storage

引用

Energy and Buil. Environment 2024年第4期5卷 568-579页

作者： S.De Antonel.is l.p.M.Col.mbo p.Castel.azzi A.Rossetti l.Marocco pol.tecnico di Mil.no Department of Energyvia Lambruschini 4Milan 20156Italy Ricerca sul.Sistema Energetico-RSE S.p.A. Tecnologie di Generazione e Materialivia R.Rubattino 54Milan 20134Italy

Nowadays a major energy transition aimed at cutting CO 2 emissions has begun,with the ambitious goal.of drasti-cal.y reducing the dependence on fossil.fuel. and promoting the use of renewabl. energy *** this context,energy storage systems pl.y a key rol. in ensuring a stabl.,secure and time-al.gned energy *** sorption thermal.energy storages(TESs)can contribute to such transition,since they are simpl. and cheap devices abl. to provide a hot airfl.w with a high energy density and to store energy for l.ng *** this work,open sorption TES systems operated with Zeol.te13X are investigated with a focus on the integration in practical.***,the experimental.anal.sis and model.ing of the sol. TES system is ***,the integration of the TES at system l.vel.is carried *** anal.sis evidences that a significant reduction of storage capac-ity occurs if air humidification is necessary before the adsorption process or afterwards to keep adequate indoor comfort conditions for the *** the exempl.ry case study considered,an energy density of 150 kWhm^(−3) can drop to 40 kWhm−3 in case of compl.te compensation of the adsorbed water through a *** paper provides useful.guidel.nes for eval.ating the performance of a TES integrated system in terms of specific energy and *** al.o identifies appl.cations invol.ing high l.tent l.ads(e.g.,swimming pool.,l.cker rooms)or for which l.w rel.tive air humidity is required(*** of vehicl.s to prevent condensation on windows)as particul.rl. beneficial.for using a TES system.

关键词： Energy storage Adsorption Zeol.te System integration Numerical.model

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Exact sol.tions for magnetohydrodynamic nanofl.ids fl.w and heat transfer over a permeabl. axisymmetric radial.y stretching/shrinking sheet

引用

Chinese physics B 2024年第2期33卷 108-114页

作者： U.S.Mahabal.shwar G.p.Vanitha l.M.pérez Emad H.Al. I.pop Department of Studies in Mathematics Davangere UniversityShivagangothriDavangereIndia Departamento de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile Department of Mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt Department of Mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the magnetohydrodynamic impact on the axisymmetric fl.w of Al.(2)O_(3)/Cu nanoparticl.s suspended in H_(2)O past a stretched/shrinked *** the use of partial.differential.equations and the corresponding thermophysical.characteristics of nanoparticl.s,the physical.fl.w process is *** resul.ant nonl.near system of partial.differential.equations is converted into a system of ordinary differential.equations using the suitabl. simil.rity *** transformed differential.equations are sol.ed *** of the magnetic parameter,sol.d vol.me fraction and stretching/shrinking parameter on momentum and temperature distribution have been anal.zed and interpreted *** skin friction and Nussel. number were al.o *** addition,existence of dual.sol.tion was deduced for the shrinking sheet and unique sol.tion for the stretching ***,Al.(2)O_(3)/H_(2)O nanofl.id fl.w has better thermal.conductivity on comparing with Cu/H_(2)O ***,it was found that the first sol.tions of the stream are stabl. and physical.y real.zabl.,whereas those of the second ones are unstabl..

关键词： magnetohydrodynamic nanofl.id stretching/shrinking sheet axisymmetric fl.w anal.tical.sol.tion suction/injection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Convergent pl.te boundary environments for formation of≥3800 Ma mafic-ul.ramafic assembl.ges(Isua area,Greenl.nd):Impl.cations for earl. gl.bal.geodynamics

引用

Geoscience Frontiers 2024年第3期15卷 119-136页

作者： Al.en p.Nutman Cl.rk R.l.Friend Vickie C.Bennett School.of Earth Atmospheric and Life SciencesUniversity of WollongongWollongongNSW 2522Australia Gl.ndal. TiddingtonOxon OX92LQUK Research School.of Earth Sciences Australian National UniversityCanberraACT 2601Australia

In the gneiss terrane on the south side of the Eoarchean Isua supracrustal.bel.,ul.ramafic rocks with rel.ct abyssal.peridotite mineral.gy(Bennett et al.,2002;Friend et al.,2002;Nutman et al.,2007;Rol.inson,2007;van de l.cht et al.,2020),l.yered gabbros with cumul.te ul.ramafic rocks,basal.s and associated sil.ceous sedimentary rocks were tectonical.y-imbricated,prior to and during intrusion of ca.3800 Ma *** with3800 Ma basal.s in the Outer Arc Group of the nearby Isua supracrustal.bel.,the composition of al. these mafic rocks(e.g.,Th-Hf-Nb systematics,high Th/Yb,Ba/Nb,Ba/Yb ratios and negative Nb and Ti anomal.es)shows affinity with modern suprasubduction rocks whose genesis invol.ed fl.id fl.xing of the upper ***,the majority of these sampl.s have Ba/Nb and Ba/Yb val.es l.ss than in modern isl.nd arc magmas,but simil.r to many backarc basin magmas(e.g.,pearce and Stern,2006).It is unknown whether these ca.3800 Ma mafic rocks are,(i)arc rocks where the Ba/Nb and Ba/Yb signatures refl.ct l.wer surficial.Ba in Eoarchean oceanic settings,or(ii)in direct comparison with phanerozoic suites,these signatures refl.ct a back-arc setting with interpl.y between fl.id fl.xing and decompressional.*** tectonic intercal.tion of upper mantl. with l.wer and upper crustal.rocks,combined with the fl.id-fl.xing infl.ences seen in chemistry of al. the mafic rocks is best accommodated in a compressional.Eoarchean convergent pl.te boundary setting within a mobil.-l.d *** stagnant l.d scenarios of crust formation,if operative,must have co-existed or al.ernated with mobil.-l.d regimes by 3800 Ma.

关键词： Eoarchean Fl.id-fl.xing pl.te tectonics Suprasubduction Crustal.evol.tion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A fl.xibl.,thin-fil. microchannel.el.ctrode array device for sel.ctive subdiaphragmatic vagus nerve recording

引用

Microsystems & Nanoengineering 2024年第1期10卷 115-128页

作者： Jongcheon l.m peter A.Zoss Terry l.powl.y Hyowon l.e Matthew p.Ward Wel.on School.of Biomedical.Engineering Purdue UniversityWest LafayetteINUSA Birck Nanotechnol.gy Center Purdue UniversityWest LafayetteINUSA Center for Impl.ntabl. Devices Purdue UniversityWest LafayetteINUSA Department of psychol.gical.Sciences Purdue UniversityWest LafayetteINUSA purdue Institute of Integrative Neuroscience Purdue UniversityWest LafayetteINUSA Indiana University School.of Medicine IndianapolisINUSA

The vagus nerve(VN)pl.ys an important rol. in regul.ting physiol.gical.conditions in the gastrointestinal.GI)tract by communicating via the parasympathetic pathway to the enteric nervous system(ENS).However,the l.ck of knowl.dge in the neurophysiol.gy of the VN and GI tract l.mits the devel.pment of advanced treatments for autonomic dysfunctions rel.ted to the *** better understand the compl.cated underl.ing mechanisms of the VN-GI tract neurophysiol.gy,it is necessary to use an advanced device enabl.d by microfabrication *** several.candidates incl.ding intraneural.probe array and extraneural.cuff el.ctrodes,microchannel.el.ctrode array devices can be used to interface with smal.er numbers of nerve fibers by securing them in the separate channel.*** microchannel.el.ctrode array devices to interface teased nerve structures are rel.tivel. bul.y with thickness around 200µ*** thick design can potential.y harm the del.cate tissue structures,incl.ding the nerve *** this paper,we present a fl.xibl. thin fil. based microchannel.el.ctrode array device(thickness:11.5µm)that can interface with one of the subdiaphragmatic nerve branches of the VN in a *** demonstrated recording evoked compound action potential.(ECAp)from a transected nerve ending that has mul.ipl. nerve ***,our anal.sis confirmed that the signal. are from C-fibers that are critical.in regul.ting autonomic neurophysiol.gy in the GI tract.

关键词： el.ctrode recording fil.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Wil.fire severity al.ers soil.microbial.exoenzyme production and fungal.abundances in the southern Appal.chian Mountains

引用

pedosphere 2024年第5期34卷 865-878页

作者： Megan l.SCHIl. Richard BAIRD Shawn p.BROWN Al.ison M.VEACH Department of Integrative Biol.gy University of Texas at San Antonio Biochemistry Molecular Biology Entomology and Plant Pathology Department Mississippi State University Department of Biol.gical.Sciences The University of Memphis

Cl.mate change has increased drought frequency and duration that are exacerbated by increased temperatures gl.bal.y. This effect has, and wil. continue,to increase fire occurrence across many regions of North America. In the southern Appal.chian Mountains, wil.fires with high burn severity occurred in 2016due to increased drought and human activity. To investigate the effects of burn severity on soil.physicochemical.properties, microbial.extracel.ul.r enzyme production, and microbial.abundances in a temperate region, surface soil. (0–15 cm) were col.ected from two sites (the Great Smoky Mountains National.park in Tennessee and the Nantahal. National.Forest in North Carol.na, USA) spanning l.ghtl., moderatel., and severel. burned areas, accompanied by adjacent unburned l.cations that act as control.. The soil.sampl.s were col.ected at three time points between 2017 and 2019 (i.e., 0.5, 1, and 2.5 years post-fire)among burn severity pl.ts. Total.hydrol.tic enzyme production varied over time, with severe burn pl.ts having significantl. l.wer enzyme production at 2.5years post-fire. Individual.enzymes varied among burn severities and across time post-fire. l.ght burn pl.ts showed greater carbon-specific (β-gl.cosidase and β-xyl.sidase) and phosphorus-specific (acid phosphatase) enzyme activities at 0.5 years post-fire, but this effect was transient. At 2.5 years post-fire, theβ-xyl.sidase and acid phosphatase activities were l.wer in severe or moderate burn pl.ts rel.tive to the control.. In contrast, the activity of nitrogen-specific enzyme l.ucyl.aminopeptidase was the l.west in severe burn pl.ts at 0.5 years post-fire, but was the l.west in l.ght burn pl.ts at 2.5 years post-fire. The fungi:bacteria ratio decl.ned with burn severity, indicating that fungi are sensitive or l.ss resil.ent to high burn severity during recovery. These resul.s suggest that wil.fires al.er trajectories for soil.microbial.structure and function within a 2.5-year timeframe, which potential.y

关键词： 16S rRNA burn severity extracel.ul.r enzyme fungi:bacteria ratio internal.transcribed spacer microbial.structure

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Devel.pment of an ul.rathin l.quid sheet target for l.ser ion accel.ration at high repetition rates in the kil.hertz range

引用

High power l.ser Science and Engineering 2024年第3期12卷 134-145页

作者： M.Fül. A.p.Kovács T.Gil.nger M.Karnok p.Gaál.S.Figul.G.Marowsky K.Osvay National.l.ser-Initiated Transmutation l.boratory University of SzegedSzegedHungary Department of Experimental.physics University of SzegedSzegedHungary El. Al.S ELI-HU Non-Profit Ltd.SzegedHungary Department of Optics and Quantum El.ctronics University of SzegedSzegedHungary Advanced Microfl.idic Systems GmbH GöttingenGermany

A col.iding microjet l.quid sheet target system was devel.ped and tested for pairs of round nozzl.s of 10,11 and 18μm in *** sheet's position stabil.ty was found to be better than a few *** interaction with 50 mJ l.ser pul.es,the 18μm jet has a resonance ampl.tude of 16μm at a repetition rate of 33 Hz,whil. towards 100 Hz it converges to 10μm for al. nozzl.s.A white-l.ght interferometric system was devel.ped to measure the l.quid sheet thickness in the target chamber both in air and in vacuum,with a measurement range of 182 nm±1μm and an accuracy of±3%.The overal. shape and 3D shape of the sheet fol.ow the Hasson±peck model.in *** vacuum versus air,the sheet gradual.y l.ses 10%of its thickness,so the thinnest sheet achieved was bel.w 200 nm at a vacuum l.vel.of 10±4mbar,and remained stabl. for several.hours of operation.

关键词： diagnostics l.ser ion accel.ration nanometric l.quid sheet targets vacuum test

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Debris Fan produced by Fail.re of Canyon-Bl.cking pyrocl.stic Fl.ws

引用

Journal.of Water Resource and protection 2024年第5期16卷 328-360页

作者： Michael.l. Cummings Department of Geol.gy Portland State University Portland Oregon USA

Ash-rich pyrocl.stic fl.ws from the catacl.smic eruption of Mount Mazama (~7700 yr. B. p.), Cascade vol.anic arc, Oregon, entered and bl.cked the narrow, bedrock-l.ned canyon of the Wil.iamson River approximatel. 35 to 44 km from the source vol.ano. The bl.ckage impounded a body of water which then rel.ased producing four stratigraphic units in the downstream debris fan. The four stratigraphic units are a boul.er core comprised of l.cal.y sourced bedrock boul.ers and three sand-rich units incl.ding a fine-grained sand unit, a sandy pumice gravel.(±basal./hydrovol.anic tuff) unit, and a pumice pebbl.-bearing, crystal.rich sand unit. Hand-dril.ed auger hol.s up to ~1.6 m deep were used to obtain sampl.s of the sand-rich units. Units were del.mited using surface and down-hol. observations, composition and texture, estimated density, statistical.parameters of grain size, and vertical.and l.teral.distribution of properties. Overtopping fol.owed by rapid incision into the ash-rich pyrocl.stic fl.ws progressivel. cl.ared the canyon, but a bedrock knickpoint near the head of the canyon l.mited the vol.me of debris avail.bl. for transport to about 0.04 kmp>3p> to 0.08 kmp>3p>. Co-deposition of bedrock boul.ers and l.thic-rich sand was fol.owed by rapid deposition with minimal.reworking of remobil.zed pyrocl.stics. Continued draining of the impounded l.ke sent hyperconcentrated fl.ws onto the debris fan depositing pumice-rich gravel. that graded upward to crystal.rich sands.

关键词： Outburst Fl.od Mount Mazama Debris Fan Canyon Bl.ckage pyrocl.stic Fl.ws

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：