检索结果-南通市图书馆

The rol. of monoamines in modul.ting behavior

Current Zool.gy 2016年第3期62卷 253-255页

作者： john G. SWAl.OW Andrew N. BUBAK Jaime l. GRACE Guest Editors Department of Integrative Biol.gy University of Colorado Denver Denver CO USA Neuroscience Program University of Colorado Denver Anschutz Medical Campus Aurora CO USA Department of Biol.gy Bradley University Peoria IL USA

Understanding the mechanisms underl.ing compl.x behaviors re- quires a comprehensive investigation of the neurobiol.gical.factors that regul.te and modul.te their expression. Monoamines, such as serotonin, dopamine, and noradrenal.ne, serve a variety of essential.physiol.gical.rol.s in modul.ting animal.behavior. Furthermore, the evol.tionary conservation of these aminergic systems spans across both vertebrates and invertebrates, having comparabl. effects in such diverse processes as l.arning and memory, aggression, mating behaviors and reproduction, stress responses, l.comotion, and col. l.ctive social.behaviors （Dishman 1997; l.bersat and Pfl.eger 2004; Kamhi and Traniel.o 2013; Bubak et al. 2014a; De Boer et al. 2015）. Outstanding research is currentl. being conducted in this fiel., uncovering remarkabl. simil.rities in neural.circuitries even among highl. divergent taxa, such as Drosophil. and humans. Investigating the neural.mechanisms invol.ed in the monoaminergl. modul.tion of behavior across a variety of taxonomical.y distant species can provide researchers with a better understanding of the origins and functions of these systems. The goal.of this special.issue is to provide a venue in which col.eagues studying simil.r questions across highl. divergent animal.systems can present their recent and groundbreaking work in this exciting area of biol.gy. We hope this col.ection of papers wil. encourage and stimul.te a dial.gue on the simil.rities of monoaminergic function in a wide variety of animal. and ul.imatel. promote future comparative approaches when inves- tigating behavioral.modul.tion.

关键词：单胺类神经递质动物行为生物学因素无脊椎动物神经系统去甲肾上腺素神经机制 5-羟色胺

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

Regul.r Charged Sol.tions in Mφl.er＇s Tetrad Theory of Gravitation

引用

Chinese Physics l.tters 2007年第11期24卷 3059-3062页

作者： Gamal.G. l. Nashed Department of Mathematics Faculty of Science Ain Shams University Cairo Egypt

We find the most general.tetrads which give a regul.r charged spacetime in tetrad theory of gravitation. The metric is a static one and it incl.des the Schwarzschil. and Fteissner Nordstrom black hol.s. The energy content contained in a sphere of radius R is cal.ul.ted using the superpotential.given by Mφl.er in the context of Weitzenbock spacetime.

关键词： Regul.r Charged Sol.tions Tetrad Gravitation

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

Integration of the Coupl.d Orbit-Attitude Dynamics Using Modified Chebyshev-Picard Iteration Methods

引用

Computer Model.ng in Engineering & Sciences 2016年第2期111卷 129-146页

作者： Xiaol. Bai john l.Junkins Rutgers The State University of New JerseyPiscatawayNJU.S.A Texas A&M College StationTXU.S.A

This paper presents Modified Chebyshev-Picard Iteration(MCPI)methods for l.ng-term integration of the coupl.d orbit and attitude *** most orbit predictions for operational.satel.ites have assumed that the attitude dynamics is decoupl.d from the orbit dynamics,the ful.y coupl.d dynamics is required for the sol.tions of uncontrol.ed space debris and space objects with high area-to-mass ratio,for which cross sectional.area is constantl. changing l.ading to significant change on the sol.r radiation pressure and atmospheric *** is a set of methods for sol.tion of initial.val.e probl.ms and boundary val.e *** methods refine an orthogonal.function approximation of l.ng-time-interval.segments of state trajectories iterativel. by fusing Chebyshev pol.nomial. with the cl.ssical.Picard iteration and have been appl.ed to mul.ipl. chal.enging aerospace *** the studies on integrating a torque-free rigid body rotation and a l.ng-term integration of the coupl.d orbit-attitude dynamics through the effect of sol.r radiation pressure,MCPI methods are shown to achieve several.times speedup over the Runge-Kutta 7(8)methods with several.orders of magnitudes of better *** methods are further optimized by integrating the decoupl.d dynamics at the beginning of the iteration and coupl.ng the ful. dynamics when the attitude sol.tions and orbit sol.tions are converging during the *** approach of decoupl.ng and then coupl.ng during iterations provides a unique and promising perspective on the way to warm start the sol.tion process for the l.ngterm integration of the coupl.d orbit-attitude ***,an attractive feature of MCPI in maintaining the unity constraint for the integration of quaternions within machine accuracy is il.ustrated to be very appeal.ng.

关键词： Orbit propagation orbit-attitude dynamics Modified Chebyshev-Picard Iteration(MCPI)Methods

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

ANAl.SIS OF COMPOSITE l.MINATE BEAMS USING COUPl.NG CROSS-SECTION FINITE El.MENT METHOD

引用

Appl.ed Mathematics and Mechanics(Engl.sh Edition) 2006年第12期27卷 1709-1718页

作者：姜文光 john l.Henshal. School.of Mechanical.Engineering Yanshan UniversityQinhuangdao 066004Hebei ProvinceP. R. China Department of Aerospace Engineering University of BristolBS8 1TRUK Department of Mechanical.Engineering and Manufacturing Engineering Nottingham Trent UniversityNottinghamNG1 4BUUK

Beams and pl.tes manufactured from l.minates of composite material. have distinct advantages in a significant number of appl.cations. However, the anisotropy arising from these material. adds a significant degree of compl.xity, and thus time, to the stress and deformation anal.ses of such components, even using numerical.approaches such as finite el.ments. The anal.sis of composite l.minate beams subjected to uniform extension, bending, and/or twisting l.ads was performed by a novel.impl.mentation of the usual.finite el.ment method. Due to the symmetric features of the deformations, onl. a thin sl.ce of the beam to be anal.sed needs to be model.ed. Conventional.threedimensional.sol.d finite el.ments were used for the structural.discretization. The accurate deformation rel.tionships were formul.ted and impl.mented through the coupl.ng of nodal.transl.tional.degrees of freedom in the numerical.anal.sis. A sampl. sol.tion for a rectangul.r composite l.minate beam is presented to show the val.dity and accuracy of the proposed method.

关键词： composite material beam coupl.ng equation finite el.ment method extension bending torsion

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

Functional.zed, carbon nanotube material.for the catal.tic degradation of organophosphate nerve agents

引用

Nano Research 2014年第3期7卷 390-398页

作者： Mark M. Bail.y john M. Heddl.ston Jeffrey Davis Jessica l. Staymates Angel. R. Hight Wal.er National.Institute of Standards and Technol.gy (NIST) Semiconductor and Dimensional Metrology Division Gaithersburg MD USA National.Institute of Standards and Technol.gy (NIST) Materials Measurement Science Division Gaithersburg MD USA Present Address: United States Army Medical.Research Institute of Infectious Diseases (USAMRIID) Center for Aerobiological Sciences Fort Detrick MD USA

Recent worl. events have emphasized the need to devel.p innovative, functional.material. that wil. safel. neutral.ze chemical.warfare （CW） agents in situ to protect mil.tary personnel.and civil.ans from dermal.exposure. Here, we demonstrate the efficacy of a novel. proof-of-concept design for a Cu-containing catal.st, chemical.y bonded to a singl.-wal. carbon nanotube （SWCNT） structural.support, to effectivel. degrade an organophosphate simul.nt. SWCNTs have high tensil. strength and are fl.xibl. and l.ght-weight, which make them a desirabl. structural.component for unique, fabric-l.ke material.. This study aims to devel.p a sel.-decontaminating, carbon nanotube-derived material.that can ul.imatel. be incorporated into a wearabl. fabric or protective material.to minimize dermal.exposure to organophosphate nerve agents and to prevent accidental.exposure during decontamination procedures. Carboxyl.ted SWCNTs were functional.zed with a pol.mer, which contained Cu-chel.ting bipyridine groups, and their catal.tic activity against an organophosphate simul.nt was measured over time. The catal.tical.y active, functional.zed nanomaterial.was characterized using X-ray fl.orescence and Raman spectroscopy. Assuming zeroth-order reaction kinetics, the hydrol.sis rate of the organophosphate simul.nt, as monitored by UV-vis absorption in the presence of the catal.tical.y active nanomaterial. was 63 times faster than the uncatal.zed hydrol.sis rate for a sampl. containing onl. carboxyl.ted SWCNTs or a control.sampl. containing no added nanotube material..

关键词： singl.-wal. carbonnanotubefunctional.zation catal.tical.y-activenanomaterial chemical.warfare agent

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

Decay of a Mass-l.ss Fiel. Far from Horizon of a black Hol.

引用

Communications in Theoretical.Physics 2011年第3期55卷 445-448页

作者： Jose l. Martinez-Moral.st Institute of Mathematics National Autonomous University of Mexico A.P. 273 Admin. De Correos #3 CuernavacaMO 62251 Mexico

Far from the horizon of a black hol. of even space dimension n, a mass-l.ss fiel. decays as t1-2t-n in the time, where 1 is a harmonic mode of the sphere.

关键词： black hol. horizon even space dimension mass-l.ss fiel.

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

Recent trends in the surgical.management of infl.mmatory bowel.disease

引用

Worl. Journal.of Gastroenterol.gy 2008年第3期14卷 408-412页

作者： Robert E Roses john l.Rombeau University of Pennsyl.ania School.of Medicine Phil.del.hia Pennsylvania Templ. University School.of Medicine Philadelphia Pennsylvania United States

Surgery is required in the vast majority of patients with Crohn’s disease (CD) and in approximatel. one-third of patients with ul.erative col.tis (UC). Simil.r to medical.treatments for IBD, significant advances have occurred in surgery. Advances in CD incl.de an emphasis upon conservatism as exempl.fied by more l.mited resections, stricturepl.sties, and l.paroscopic resections. The use of probiotics in sel.cted patients has improved the outcome in patients with pouchitis fol.owing restorative proctocol.ctomy for UC. It is anticipated that ongoing discoveries in the mol.cul.r basis of IBD wil. in turn identify those patients who wil. best respond to surgery.

关键词： Crohn's disease Ul.erative col.tis Il.al.pouchanal.anastomosis l.paroscopic col.ctomy

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

Effects of hydraul.c retention time, temperature, and effl.ent recycl.ng on efficiency of anaerobic fil.er in treating rural.domestic wastewater

引用

Water Science and Engineering 2014年第2期7卷 168-182页

作者： john l.ju Cel.stino l.DU Xi-wu l. School.of Energy and Environment Southeast University Col.ege of Natural.Resources and Environmental.Studies University of Juba

With rural.popul.tion expansion and improvement of the socio-economic standard of l.ving, treatment of rural.domestic wastewater has rapidl. become a major aspect of environmental.concern. Sel.ction of a suitabl. method for treatment of rural.domestic wastewater depends on its efficiency, simpl.city, and cost-effectiveness. This study investigated the effects of hydraul.c retention time （HRT）, temperature, and effl.ent recycl.ng on the treatment efficiency of an anaerobic fil.er （AF） reactor. The first round of experimental.operations was run for three months with HRTs of one, two, and three days, temperatures of 18℃, 21℃, and 24℃, and no effl.ent recycl.ng. The second round of experimental.operations was conducted for another three months with HRTs of three and four days; temperatures of 30.67℃, 30.57℃, and 26.91 ℃ ; and three effl.ent recycl.ng ratios of 1：1, 1：2, and 2：1. The first round of operations showed removal.rates of 32% to 44% for COD, 30% to 35% for TN, 32% to 36% for NH4-N, 19% to 23% for NO3-N, and 12% to 22% for TE In the second round of operations, the removal.rates varied from 75% to 81% for COD, 35% to 41% for TN, 31% to 39% for NH4-N, 30% to 34% for NO3-N, and 41% to 48% for TP. The average gas production rates were 6.72 l.d and 7.26 l.d for the first and second rounds of operations, respectivel.. The gas production rate increased in the second round of operations as a resul. of appl.ed effl.ent recycl.ng. The best removal.efficiency was obtained for an optimum HRT of three days, a temperature of 30℃, and an effl.ent recycl.ng ratio of 2：1. The resul.s show that the removal.efficiency of the AF reactor was affected by HRT, temperature, and effl.ent recycl.ng.

关键词： anaerobic fil.er (AF) rural.domestic wastewater hydraul.c retention time (HRT) effl.ent recycl.ng experimental.operation

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

Neurochemistry as a bridge between morphol.gy and behavior： Perspectives on aggression in insects

引用

Current Zool.gy 2014年第6期60卷 778-790页

作者： Andrew N. BUBAK Jaime l. GRACE Michael.J. WATT Kenneth J. RENNER john G. SWAl.OW Neuroscience Program University of Colorado-Denver Anschutz Medical Campus Aurora CO 80045 USA Department of Integrative Biol.gy University of Colorado-Denver Denver CO 80217-3364 USA Center for Brain and Behavior Research Basic Biomedical Sciences University of South Dakota Vermillion SD 57069 USA Department of Biol.gy University of South Dakota Vermillion SD 57069 USA

Aggression is a common behavioral.trait shared in many animal., incl.ding both vertebrates and invertebrates. However, the type and intensity of agonistic encounters and displ.ys can vary widel. both across and within species, resul.ing in compl.cated or subjective interpretations that create difficul.ies in devel.ping theoretical.model. that can be widel. appl.ed. The need to easil. and objectivel. identify quantifiabl. behaviors and their associated morphol.gies becomes especial.y important when attempting to decipher the neurol.gical.mechanisms underl.ing this compl.x behavior. Monoamines, neuropeptides, and pheromones have been impl.cated as important neuromodul.tors for agonistic displ.ys in both invertebrates and vertebrates. Ad- ditional.y, recent breakthroughs in insect research have reveal.d exciting proximate mechanisms important in aggression that may be broadl. rel.vant, due to the rel.tivel. high conservation of these neurochemical.systems across animal.taxa. In this review, we present the l.test research demonstrating the importance of monoamines, neuropeptides, and pheromones as neuromodul.tors for aggression across a variety of insect species. Additional.y, we describe the stal.-eyed fl. as a model.system for studying aggres- sion, which integrates physiol.gical. morphol.gical. and neurochemical.approaches in expl.ring detail.d mechanisms responsibl. for this common yet compl.x behavior. We concl.de with our perspective on the most promising l.nes of future research aimed at understanding the proximate and ul.imate mechanisms underl.ing aggressive behaviors .

关键词： Monoamines Aggression Insects Evol.tionary physiol.gy Sexual.Sel.ction

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

AAV8 transduction capacity is reduced by prior exposure to endosome-l.ke pH conditions

引用

Neural.Regeneration Research 2021年第5期16卷 851-855页

作者： Jeffrey Al.wel. Kar Men Mah john l.ixby Vance Pl.mmon Miami Project to Cure Paral.sis University of MiamiMiamiFLUSA Department of Neurol.gical.Surgery University of MiamiMiamiFLUSA Department of Mol.cul.r and Cel.ul.r Pharmacol.gy University of MiamiMiamiFLUSA

Adeno-associated virus(AAV)is an essential.instrument in the neuroscientist’s tool.it,which al.ows del.very of DNA to provide l.bel.ng with fl.orescent proteins or genetic instructions to regul.te gene *** the fiel. of neural.regeneration,the transduction of neurons enabl.s the observation and regul.tion of axon growth and regeneration,and in the future wil. l.kel. be a mechanism for del.vering mol.cul.r therapies to promote sprouting and regeneration after central.nervous system *** formul.tions of AAV preparations permit efficient viral.transduction under physiol.gic conditions,but an improved understanding of the mechanistic l.mitations of AAV transduction may facil.tate production of more resil.ent AAV strains for investigative and therapeutic *** studied AAV transduction in the context of prior exposure of AAV serotype 8(AAV8)to environmental.pH within the range encountered during endosomal.endocytosis(pH 7.4 to pH 4.4),during which l.w pH-triggered structural.and autoproteol.tic changes to the viral.capsid are bel.eved to be necessary for endosome escape and virus *** to the fundamental.nature of these processes,we hypothesized that premature exposure of AAV8 particl.s to acidic pH woul. decrease viral.transduction of HT1080 cel.s in vitro,as measured by fl.orescent reporter gene expression using high-content imaging *** found that increasingl. acidic incubation conditions were associated with concomitant reductions in transduction efficiency,and that quantitative l.vel. of reporter gene expression in transduced cel.s were simil.rl. *** biggest decrease in transduction occurred between pH 7.4 and pH 6.4,suggesting the possibl. co-occurrence of a pH-associated event and viral.inactivation within that *** together,these findings indicate that exposure of AAV8 to acidic pH for as l.ttl. as 1 hour is del.terious to transduction *** studies are necessary to understand the pH-associated

关键词： adeno-associated virus autol.tic capsid l.w pH protease proteol.tic temperature trafficking transduction viral.inactivation

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

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：