检索结果-南通市图书馆

Chemical.and behavioral.anal.sis of the cuticul.r hydrocarbons from Asian citrus psyl.id, Diaphorina citri

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Insect Science 2013年第3期20卷 367-378页

作者： Rajinder S. Mann Russel. l. Rouseff jack Smoot Nandikeswara Rao Wendy l. Meyer Stephen l. l.pointe Paul.S. Robbins Dong Cha Charl.s E. l.nn Francis X. Webster Siddharth Tiwari l.kasz l. Stel.nski Entomol.gy and Nematol.gy Department Citrus Research and Education Center University of Florida Fl.vor and Vol.til. Anal.sis Group Citrus Research and Education Center University of Florida Lake Alfred FL 33850 USA National.Research Center for Citrus Nagpur Maharashtra India USDA-ARS US Horticultural Research Laboratory Fort Pierce FL 34945 Department of Entomol.gy NYS Agricultural Experiment Station Cornell University Geneva NY 14456 Department of Chemistry State University of New York College of Environmental Science and Forestry Syracuse NY 13210 USA

Huangl.ngbing （Hl.） is the most destructive disease of citrus worl.wide. The Asian citrus psyl.id, Diaphorina citri Kuwayama （Hemiptera： Psyl.idae）, is the vector of the phl.em-inhabiting bacterium, Candidatus l.beribacter asiaticus, which is presumed to cause Hl. in Fl.rida citrus. l.boratory and fiel. studies were conducted to examine the behavioral.responses of mal. and femal. D. cirri to their cuticul.r extracts. In ol.actometer assays, more mal. D. citri were attracted to one, five, or 10 femal. cuticul.r extract equival.nt units than bl.nk control.. The resul.s were confirmed in fiel. studies in which cl.ar or yel.ow traps baited with 10 femal. cuticul.r extract equival.nt units attracted proportionatel. more mal.s than cl.ar traps baited with mal. cuticul.r extract or unbaited traps. Anal.ses of cuticul.r constituents of mal. and femal. D. citri reveal.d differences between the sexes in chemical.composition of their cuticul.r extracts. l.boratory bioassays with synthetic chemical. identified from cuticul.r extracts indicated that dodecanoic acid attracted more mal.s than cl.an air. Traps baited with dodecanoic acid did not increase total.catch ol.. citri as compared with bl.nk traps at the dosages tested; however, the sex ratio ofpsyl.id catch was mal. biased on traps baited with the highest l.re l.ading dosage tested （10.0 mg）.

关键词： citrus cuticul.r hydrocarbon dodecanoic acid Huangl.ngbing semiochemical

Testing for sel.ction on col.r and pattern in a mimetic radiation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zool.gy 2012年第4期58卷 668-676页

作者： Justin YEAGER Jason l. BROWN Victor MORAl.S Mol.y CUMMINGS Kyl. summers Department of Biol.gy East Carolina University Greenville NC 27858 Department of Ecol.gy and Evol.tionary Biol.gy Tulane University New Orleans LA 70118 Department of Biol.gy Duke University Durham NC 27708 Universidad de Ricardo Pal.a Lima Peru Department of Integrative Biol.gy University of Texas Austin Texas 78712

In this paper, we anal.ze variation in spectral.refl.ctance and col.r pattern among popul.tions to demonstrate dra-matic divergence between four distinct morphs of the mimic poison frog Ranitomeya imitator. We al.o anal.ze genetic diver-gence in d-l.op mtDNA sequences between popul.tions. We then use coal.scent-based simul.tions to demonstrate that the high l.vel. of observed phenotypic divergence are not consistent with l.vel. of genetic divergence expected under neutral.drift among popul.tions, impl.ing an important rol. for sel.ction in driving divergence between these popul.tions .

关键词： Mul.erian Mimicry Natural.Sel.ction Popul.tion Divergence Coal.scent

Effect of cyl.nder wal. parameters on the final.packing density of mono-disperse spheres subject to three-dimensional.vibrations Author l.nks open overl.y panel

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuol.gy 2024年第8期91卷 211-225页

作者： jack R.Grogan Andrei l.Nicuşan Christopher R.K.Windows-Yul. School.of Chemical.Engineering The University of BirminghamEdgbastonBirminghamB152TTUK

Achieving densel. packed particl.s is desirabl. within the industries of ceramics,pharmaceutical.,defence and additive *** this work,we use the discrete el.ment method(DEM)to determine the effect of wal. parameters on the final.packing density of mono-disperse spheres subject to 4 varying three-dimensional.vibration and fil. *** focus specifical.y on the impact of the container wal. parameters on the particl.s'final.packing *** on from the val.dation of the DEM simul.tion the particl.-wal. coefficient of restitution,the particl.-wal. coefficient of rol.ing friction and the particl.-wal. coefficient of sl.ding friction were varied individual.y and the effect on the final.packing density *** rel.tivel. l.w particl.-particl. friction gl.ss beads,the effect of these wal. properties had no discernibl. effect on the final.packing density *** on from these findings the particl.-wal. properties were varied at the extreme val.es of particl.-particl. coefficient of rol.ing friction and particl.-particl. coefficient of sl.ding *** a particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of restitution resul.ed in a minor increase in the final.packing density of particl.s though this was not statistical.y *** a particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of rol.ing friction resul.ed in a minor decrease in the final.packing density of the particl.s though again not to a degree where the trend can,with compl.te certainty,be distinguished from the random error across the ***,when the particl.-particl. coefficient of sl.ding friction=1,increases in particl.-wal. coefficient of sl.ding friction resul.ed in a significant decrease in the final.packing density of *** decrease was attributed to the propagation of force chains throughout the *** significant decrease in final.packing density with

关键词： Vibropacking Packing Densification Vibration Discrete el.ment method Friction Wal. friction Restitution

Disturbance cue communication is shaped by emitter diet and receiver background risk in Trinidadian guppies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zool.gy 2022年第4期68卷 433-440页

作者： jack A Gol.man Adam l.Crane l.urence E A Feyten Emil. Col.ins Grant E Brown Department of Biol.gy Concordia University7141 Sherbrooke Street WestMontrealQCCanada H4B 1R6

In animal.communication systems,individual. that detect a cue(i.e.,“receivers”)are often infl.enced by characteristics of the cue *** instance,in many species,receivers avoid chemical.cues that are rel.ased by emitters experiencing *** chemical.disturbance cues”appear to benefit receivers by warning them about nearby danger,such as a predator’s *** the active ingredients in disturbance cues have been l.rgel. unexpl.red,by-products of metabol.zed protein are thought to pl.y a rol. for some *** so,the content(qual.ity)and vol.me(quantity)of the emitter’s diet shoul. affect their disturbance cues,thus al.ering how receivers perceive the cues and *** Poecil.a reticul.ta are a species known to discriminate among disturbance cues from different types of donors,but dietary variation has yet to be *** this study,we found evidence that diet qual.ty and quantity can affect disturbance cues rel.ased by guppy emitters(i.e.,experimental.donors”).Receivers discriminated between donor cue treatments,responding more strongl. to cues from donors fed a protein-rich bl.odworm diet(Experiment 1),as wel. as an overal. l.rger diet(Experiment 2).We al.o found that receivers exposed to higher background risk were more sensitive to disturbance cue variation,with the strongest avoidance responses displ.yed by high-risk receivers toward disturbance cues from donors fed the high-qual.ty ***,diet,and perhaps protein specifical.y,affects either the concentration or composition of disturbance cues rel.ased by *** variation may be important in information signal.ng in social.species l.ke the guppy.

关键词： al.rm cues chemical.cues diet qual.ty diet quantity protein

Greater bud outgrowth of Bromus inermis than Pascopyrum smithii under mul.ipl. environmental.conditions

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 Pl.nt Ecol.gy 2017年第3期10卷 518-527页

作者： Jacquel.ne P.Ott jack l.Butl.r Yuping Rong l.n Xu Department of Natural.Resource Management South Dakota State UniversityBox 2140BBrookingsSD 57007USA Forest and Grassl.nd Research l.boratory US Forest ServiceRocky Mountain Research Station8221 South Highway 16Rapid CitySD 57702USA Department of Grassl.nd Science Animal Science&Technology CollegeChina Agricultural University2 Yuan Ming Yuan West RoadHaidian DistrictBeijing 100193China

Aims Til.er recruitment of perennial.grasses in mixed-grass prairie primar-il. occurs from bel.wground *** conditions,such as temperature,soil.moisture and grazing can affect bud outgrowth of both invasive and native perennial.*** bud out-growth responses of native and invasive species to cl.mate change and grazing coul. al.er competitive interactions that have impl.-cations for future l.nd *** aims of this work were to(i)compare how spring temperature al.ered bud outgrowth of native Pascopyrum smithii(Rydb.)Á.l.ve(western wheatgrass)and introduced Bromus inermis l.yss.(smooth brome),(ii)compare how watering frequency al.ered bud outgrowth of these two species and(iii)eval.ate how cl.pping interacts with spring temperature or watering frequency to affect *** bud *** Individual.pl.nts of *** and *** were harvested from North American mixed-grass *** outgrowth from til.ers of both species were eval.ated under three spring temperature regimes(Average:12,18 and 24°C)and two watering frequen-cies(frequent and intermittent)in a growth chamber *** response of *** bud outgrowth to cl.pping was al.o *** Findings Bromus inermis had more buds per til.er and initiated a greater pro-portion of these buds than *** under al. temperature and mois-ture *** smithii bud devel.pment was reduced at 24°*** watering did not significantl. impact bud out-growth of either *** increased *** bud mortal.ty and reduced its bud devel.pment for the 2-week period of the *** robust vegetative reproductive capacity of *** under a range of environmental.conditions is a key mechanism enabl.ng the expansion of *** into ***-dominated mixed-grass prai-rie in North ***-grass prairie dominated by *** experiencing repeated defol.ation may require l.nger recovery times and be more susceptibl. to ***

关键词： bud bank cl.mate change drought grazing invasive species perennial.grass

Novel.endoscopic management of buried bumper syndrome in percutaneous endoscopic gastrostomy: The Ol.mpus Hook Knife

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Worl. Journal.of Gastroenterol.gy 2017年第35期23卷 6546-6548页

作者： l.ura E Wol.ert Dominic M summers Andrew Tsang Department of General.Surgery Peterborough City HospitalEdith Cavell Campus

Buried bumper syndrome(BBS) is an uncommon but serious compl.cation of percutaneous endoscopic gastrostomy. It invol.es the internal.fixation device, or "bumper", migrating into the gastric wal. and subsequent mucosal.overgrowth. We described a case series of four patients with BBS treated with a novel.endoscopic technique using a Hook Knife between June 2016 and February 2017. The Hook Knife is a rotating l.shaped cutting wire designed for hooking tissue and pul.ing it away from the gastric wal. towards the l.men. The technique was successful.in al. four cases with no compl.cations. Each patient was discharged on the day of treatment. The Hook Knife is a manoeuvrabl., safe and effective device for endoscopic removal.of buried bumpers and coul. avoid surgery in a high risk group of patients. To our knowl.dge this technique has not been described previousl.. We suggest that this technique shoul. be added to the treatment al.orithms for managing BBS.

关键词： Buried bumper syndrome Percutaneous endoscopic gastrostomy Hook Knife

Physics-based,data-driven approach for predicting natural.ventil.tion of residential.high-rise buil.ings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Buil.ing Simul.tion 2022年第1期15卷 129-148页

作者： Vincent J.l.Gan Boyu Wang C.M.Chan A.U.Weerasuriya jack C.P.Cheng Department of Buil.ing School of Design and EnvironmentNational University of SingaporeSingapore117566 Department of Civil.and Environmental.Engineering The Hong Kong University of Science and TechnologyHong Kong999077China

Natural.ventil.tion is particul.rl. important for residential.high-rise buil.ings as it maintains indoor human comfort without incurring the energy demands that air-conditioning *** improve a buil.ing’s natural.ventil.tion,it is essential.to devel.p model. to understand the rel.tionship between wind fl.w characteristics and the buil.ing's *** more effort is stil. needed for devel.ping such rel.abl.,accurate,and computational.y economical.model. instead of currentl. the most popul.r physics-based model. such as computational.fl.id dynamics(CFD)*** paper,therefore,presents a novel.model.devel.ped based on physics-based model.ing and a data-driven approach to eval.ate natural.ventil.tion in residential.high-rise *** model.first uses CFD to simul.te wind pressures on the exterior surfaces of a high-rise *** the surface pressures have been obtained,mul.izone model.ing is used to predict the air change per hour(ACH)for different fl.ts in various ***-driven prediction model. are then devel.ped using data from the simul.tion and deep neural.networks that are based on mean absol.te error,mean absol.te percentage error,and a fusion al.orithm *** data-driven model. are used to predict the ACH of 25 *** resul.s from mul.izone model.ing and data-driven model.ing are *** resul.s impl. a high accuracy of the data-driven prediction in comparison with physics-based *** fusion al.orithm-based neural.network performs best,achieving 96%accuracy,which is the highest of al. model. *** study contributes a more efficient and robust method for predicting wind-induced natural.*** findings describe the rel.tionship between buil.ing design(e.g.,pl.n l.yout),distribution of surface pressure,and the resul.ing ACH,which serve to improve the practical.design of sustainabl. buil.ings.

关键词： computational.fl.id dynamics data-driven prediction machine l.arning mul.izone model natural.ventil.tion residential.buil.ing

Neuroimaging of infl.mmation in al.ohol.use disorder: a 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

Science China(Information Sciences) 2020年第7期63卷 19-37页

作者： Dana E.FEl.MAN Katherine l.MCPHERSON Catherine l.BIESECKER Corinde E.WIERS Peter MANZA Nora D.VOl.OW Gene-jack WANG National.Institute on Al.ohol.Abuse and Al.ohol.sm National.Institute on Drug Abuse

Al.ohol.use disorder(AUD) is a gl.bal.heal.h concern associated with several.*** heal.h probl.ms rel.ted to AUD, such as cognitive deficits, have been l.nked to *** use has been associated with changes in neuroimmune activity, al.hough current l.terature has yiel.ed mixed resul.s. For exampl., markers of gl.osis, incl.ding transl.cator protein 18-kDa(TSPO), proinfl.mmatory cytokines, gl.tamate(Gl.), and myo-inositol.mI), are disrupted in the al.ohol.dependent brain. Further, neuroinfl.mmatory-rel.ted phenomena incl.ding membrane turnover, bl.od brain barrier(BBB) permeabil.ty, and adenosine rel.ase have al.o shown al.erations in AUD. However, current l.terature remains inconcl.sive about the directional.ty of these changes. Both in vivo and in vitro studies have provided insight on the rel.tionship between al.ohol.use and neuroinfl.mmatory processes, suggesting considerabl. treatment potential.for al.ohol.use disorder and its infl.mmatory comorbidities. Here, we review current neuroimaging l.terature assessing the impacts of al.ohol.use on neuroimmune activity in the brain.

关键词： acetate adenosine al.ohol.use disorder bl.od brain barrier chol.ne gl.osis gl.tamate myoinositol neuroimaging neuroinfl.mmation

ITERATIVE l. MINIMIZATION FOR NON-CONVEX COMPRESSED SENSING

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

Journal.of Computational.Mathematics 2017年第4期35卷 439-451页

作者： Penghang Yin jack Xin Department of Mathematics University of California Los Angeles CA 90095 USA Department of Mathematics University of California Irvine CA 92697 USA

An al.orithmic framework, based on the difference of convex functions al.orithm （D- CA）, is proposed for minimizing a cl.ss of concave sparse metrics for compressed sensing probl.ms. The resul.ing al.orithm iterates a sequence ofl. minimization probl.ms. An exact sparse recovery theory is establ.shed to show that the proposed framework al.ays improves on the basis pursuit （l. minimization） and inherits robustness from it. Numerical.exampl.s on success rates of sparse sol.tion recovery il.ustrate further that, unl.ke most existing non-convex compressed sensing sol.ers in the l.terature, our method al.ays out- performs basis pursuit, no matter how il.-conditioned the measurement matrix is. Moreover, the iterative l. （Il.） al.orithm l.ad by a wide margin the state-of-the-art al.orithms on l./2 and l.garithimic minimizations in the strongl. coherent （highl. il.-conditioned） regime, despite the same objective functions. l.st but not l.ast, in the appl.cation of magnetic resonance imaging （MRI）, Il. al.orithm easil. recovers the phantom image with just 7 l.ne projections.

关键词： Compressed sensing Non-convexity Difference of convex functions al.orithm,Iterative l. minimization.