检索结果-南通市图书馆

Open Journal of Bioph.sics 2012年第4期2卷 137-143页

作者： Bryce P. Mulligan Noa Gang glenn h. parker Mich.el A. Persinger Department of Biology Behavioural Neuroscience Program Department of Biology Behavioural Neuroscience Program Biomolecular Sciences Program Laurentian UniversitySudbury Canada Department of Biology Behavioural Neuroscience ProgramBiomolecular Sciences Program Laurentian UniversitySudbury Canada

Synergistic interactions between specific magnetic field intensities and ch.mical concentrations are ch.llenging bioph.sical ph.nomena. Planarian were exposed to one of five different concentrations of melatonin and to a “geomagnetic”—patterned 7 h. amplitude modulated magnetic field for 6 min once per h.ur for 8 h. during six successive nigh.s. Th. peak average strength. were with.n th. range (50 nT) or outside th. range (200 nT) derived by th. equation. As predicted by a resonance equation planarian displayed h.gh.y statistically significant decreased relative activity with.n th. 50 nT, 10–7 to 10–6 M melatonin conditions compared to lower or h.gh.r concentrations. Th. effect explained about 30% of th. variance in th.se ch.nges of activity. Activity of planarian exposed to th. same melatonin concentrations but to th. 200 nT field did not differ significantly from each.oth.r or from th.se exposed to th. 50 nT field in concentrations of melatonin –7 M or >10–6 M. Th.se results suggest th. existence of non-linear, “narrow-band” mech.nisms involving th. numbers of molecules with.n a distance determined by th. boundary of th. organism and th. intensity of naturally-patterned magnetic fields derived from energy rath.r th.n force-based resonances.

关键词： Resonance Planarian Melatonin Magnetic Fields 7 h.

Fully integrated and broadband Si-rich.silicon nitride wavelength.converter based on Bragg scattering intermodal four-wave mixing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ph.tonics Research 2024年第3期12卷 I0001-I0010页

作者： VALERIO VITALI Th.LÍA DOMÍNGUEZ BUCIO h.O LIU JOSÉMANUEL LUQUE GONZÁLEZ FRANCISCO JURADO-ROMERO ALEJANDRO ORTEGA-MOÑUX glenn Ch.RCh.LL JAMES C.GATES JAMES h.LLIER NIKOLAOS KALFAGIANNIS DANIELE MELATI JENS h.SCh.ID ILARIA CRISTIANI PAVEL Ch.BEN J.GONZALO WANGÜEMERT-PÉREZ ÑIGO MOLINA-FERNÁNDEZ FREDERIC GARDES COSIMO LACAVA PERIKLIS PETROPOULOS Optoelectronics Research.Centre University of SouthamptonSouthampton SO171BJUK Electrical Computer and Biomedical Engineering DepartmentUniversity of PaviaPavia 27100Italy Telecommunication Research.Institute(TELMA) Universidad de MálagaCEI Andalucı´a TECHE.T.S.I.Telecomunicación29010 MálagaSpain Sch.ol of Science and Tech.ology Nottingham Trent UniversityNottingham NG118NSUK Department of Electrical Engineering Eindhoven University of TechnologyEindhoven 5600 MBThe Netherlands Department of Materials Science and Engineering University of IoanninaIoannina 45110Greece Centre de Nanosciences et de Nanotech.ologies UniversitéParis-SaclayCNRS91120 PalaiseauFrance Advanced Electronics and Ph.tonics Research.Center National Research Council CanadaOttawaOntario K1A 0R6Canada

Intermodal four-wave mixing(FWM)processes h.ve recently attracted significant interest for all-optical signal processing applications th.nks to th. possibility to control th. propagation properties of waves exciting distinct spatial modes of th. same *** allows,in principle,to place signals in different spectral regions and satisfy th. ph.se match.ng condition over considerably larger bandwidth. compared to intramodal ***,th. demonstrations reported so far h.ve sh.wn a limited bandwidth.and suffered from th. lack of on-ch.p components designed for broadband manipulation of different *** demonstrate h.re a silicon-rich.silicon nitride wavelength.converter based on Bragg scattering intermodal FWM,wh.ch.integrates mode conversion,multiplexing and de-multiplexing functionalities *** system enables wavelength.conversion between pump waves and a signal located in different telecommunication bands(separated by 60 nm)with.a 3 dB bandwidth.exceeding 70 nm,wh.ch.represents,to our knowledge,th. widest bandwidth.ever ach.eved in an intermodal FWM-based system.

关键词： scattering pump modal

Polych.orinated Dibenzofurans and Dibenzo-p-Dioxin in Tree Bark from an Industrialized Area: Wh.t th. 2,3,7,8-Cl Substituted Congeners Tell Us, and Wh.t Is Missing

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Protection 2016年第3期7卷 351-357页

作者： Mark h. h.rmanson glenn W. Joh.son h.rmanson & Associates LLC Minneapolis USA University Center on Svalbard Longyearbyen Norway Energy & Geosciences Institute University of Utah Salt Lake City USA

We analyzed polych.orinated dibenzofurans (PCDF) and dibenzo-p-dioxins (PCDD) in 27 tree bark samples from th. industrialized area near Sauget, Illinois, USA. Th. trees were located with.n 4 km of th. W. G. Krummrich.(WGK) plant, th. oldest and largest ch.mical plant in Sauget, with.24 of 27 samples collected from residential areas. Th. percent of total PCDF or PCDD profiles of ten 2,3,7,8- Cl substituted PCDF and seven PCDD congeners is h.mogeneous: 90% of th. variance among th. samples is explained by 3 eigenvalues in a principal components analysis. Th. h.mogeneity of th. data suggests th.t samples were affected by similar types of sources wh.ch.may h.ve been influenced by electric power generation, ch.mical waste incineration, and large-scale th.rmal production of ch.orinated ch.micals. Quantitatively, th. 2,3,7,8-Cl substituted congener analysis does not account for 90% of th. concentration of tetra- and penta-Cl h.mologues and 80% of h.xa-Cl and 50% of h.pta-Cl h.mologues. Th. World h.alth.Organization stated during establish.ent of toxic equivalence factors (TEF, 2005 version) th.t calculation of toxic equivalents (TEQs) is not suitable for abiotic matrices, such.as tree bark, wh.ch.are not involved in h.man exposures. Our results sh.w th.t th. non-2,3,7,8-Cl substituted congeners h.ve h.gh.concentrations and sh.uld be included in analysis.

关键词： Tree Bark Polych.orinated Dibenzofurans Polych.orinated Dibenzo-p-Dioxins Principal Components Analysis

Six h.gh.intensity interval training sessions over 5 days increases maximal oxygen uptake,endurance capacity,and sub-maximal exercise fat oxidation as much.as 6 h.gh.intensity interval training sessions over 2 weeks

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 h.alth.Science 2021年第4期10卷 478-487页

作者： Muh.mmed M.Atakan Yasemin Guzel Suleyman Bulut Sukran N.Kosar glenn K.McConell h.seyin h.Turnagol Division of Nutrition and Metabolism in Exercise Faculty of Sport SciencesHacettepe UniversityAnkara 06690Turkey Institute for h.alth.and Sport Victoria UniversityMelbourneVIA 3011Australia

Background:h.gh.intensity interval training(h.IT)induces similar or even superior adaptations compared to continuous endurance ***,just 6 h.IT sessions over 2 weeks significantly improves maximal oxygen uptake(VO_(2max)),submaximal exercise fat oxidation,and endurance *** even faster adaptations can be ach.eved with.h.IT is not ***,we aimed to determine wh.th.r 2 sessions of h.IT per day,separated by 3 h.every oth.r day for 5 days(double h.IT(h.IT-D),n=15)could increase VO_(2max),submaximal exercise fat oxidation,and endurance capacity as effectively as 6 sessions of h.IT over 2 weeks(single h.IT(h.IT-S),n=13).Meth.ds:Each.training session consisted of 10×60 s of cycling at 100%of VO_(2max)interspersed with.75 s of low-intensity cycling at 60 watt(W).Pre-and post-training assessments included VO_(2max),time to exh.ustion at-80%of VO_(2max),and 60-min cycling trials at-67%of VO_(2max).Results:Similar increases(ph.IT-D:7.7%***-S:6.0%,p>0.05)and endurance capacity(h.IT-D:80.1%***-S:79.2%,p>0.05)were *** exercise carboh.drate oxidation was reduced in th. 2 groups after exercise training(h.IT-D:9.2%,p=0.014 ***-S:18.8%,p=0.012)wh.le submaximal exercise fat oxidation was significantly increased in h.IT-D(15.5%,p=0.048)but not in h.IT-S(9.3%,p=0.290).Conclusion:Six h.IT sessions over 5 days was as effective in increasing VO_(2max)and endurance capacity and was more effective in improving submaximal exercise fat oxidation th.n 6 h.IT sessions over 2 weeks.

关键词： Double interval training Exercise metabolism Performance Substrate oxidation

Lumped Parameter Outflow Models for 1-D Blood Flow Simulations:Effect on Pulse Waves and Parameter Estimation

在线全文

学校读者我要写书评

暂无评论

Communications in Computational Ph.sics 2008年第7期4卷 317-336页

作者： J.Alastruey K.h.parker J.Peiro S.J.Sh.rwin Department of Aeronautics Imperial College LondonSouth Kensington CampusLondon SW72AZU.K Department of Bioengineering Imperial College LondonSouth Kensington CampusLondon SW72AZU.K.

Several lumped parameter,or zero-dimensional(0-D),models of th. microcirculation are coupled in th. time domain to th. nonlinear,one-dimensional(1-D)equations of blood flow in large arteries.A linear analysis of th. coupled system,togeth.r with.in vivo observations,sh.ws th.t:(i)an inflow resistance th.t match.s th. ch.racteristic impedance of th. terminal arteries is required to avoid non-ph.siological wave reflections;(ii)periodic mean pressures and flow distributions in large arteries depend on arterial and periph.ral resistances,but not on th. compliances and inertias of th. system,wh.ch.only affect instantaneous pressure and flow waveforms;(iii)periph.ral inertias h.ve a minor effect on pulse waveforms under normal conditions;and(iv)th. time constant of th. diastolic pressure decay is th. same in any 1-D model artery,if viscous dissipation can be neglected in th.se arteries,and it depends on all th. periph.ral compliances and resistances of th. *** th.s analysis,we propose an algorith. to accurately estimate periph.ral resistances and compliances from in vivo *** algorith. is verified against numerical data simulated using a 1-D model network of th. 55 largest h.man arteries,in wh.ch.th. parameters of th. periph.ral windkessel outflow models are known a *** and flow waveforms in th. aorta and th. first generation of bifurcations are reproduced with.relative root-mean-square errors smaller th.n 3%.

关键词： Pulse wave propagation one-dimensional modelling lumped parameter outflow models time-domain coupling arterial compliance periph.ral compliance periph.ral resistance multiscale modelling.

Environmentally Responsible Ligh.weigh. Passenger Veh.cle Design and Manufacturing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Automotive Innovation 2023年第3期6卷 300-310页

作者： glenn S.Daeh. Katrin E.Daeh. Oliver Kuttner Department of Materials Science and Engineering The Ohio State UniversityColumbusUSA Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeUSA Edision2 CharlottesvilleUSA

Th. mass reduction of passenger veh.cles h.s been a great focus of academic research.and federal policy initiatives of th. United States with.coordinated funding efforts and even a focus of a Manufacturing USA *** potential benefit of th.se programs can be described as modest from a societal point of view,for example reducing veh.cle mass by up to 25%with.modest cost implications(under$5 per pound saved)and th. ability to implement with.existing manufacturing *** more aggressive reductions in greenh.use gas production are necessary and possible,wh.le delivering th. same *** is demonstrated with.a h.gh.r-level design th.nking exercise on an environmentally responsible ligh.weigh. veh.cle,leading to th. following criteria:ligh.weigh.,low aerodynamic drag,long-lived(over 30 years and 2 million miles),adaptable,electric,and used in a sh.red manner on average over 8 h.per *** th.se specifications,passenger-mile demand may be met with.around 1/10 of th. current *** veh.cles would likely h.ve significantly different designs and construction th.n incumbent *** is likely future automotive production will be more analogous to current aircraft produc-tion with.h.gh.r costs per pound and lower volumes,but with.dramatically reduced financial and environmental cost per passenger mile,with.less material per veh.cle,and far less material required in th. national or worldwide *** benefits of th.s vision include far fewer parking lots,greater accessibility to personal transportation,and improved pedestrian safety,wh.le maintaining a vibrant and engaging *** systemic ch.nges to th. business models and research.and development directions(including ligh.weigh. design and manufacturing)are discussed,wh.ch.could bring forth.far more sustainable personal transportation.

关键词： Sustainability Personal transportation Ligh.weigh.ing Design

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

城市生态网络功能性连接辨识方法

生态学报 2015年第19期35卷 6414-6424页

作者：陈春娣 Meurk D. Colin Ignatieva E. Maria Stewart h. glenn 吴胜军中国科学院水库水环境重点实验室、中国科学院重庆绿色智能技术研究院重庆400714 新西兰皇家科学院土地保护研究所新西兰基督城7608 林肯大学新西兰基督城7674

城市生态网络是景观生态学应用领域研究的热点和重点之一,识别、评估生境之间的连接是构建生态网络的关键环节。在总结已有连接辨识方法的基础上,提出采用最小费用模型和图论分析相结合的方法,探讨功能性连接的辨识和优先恢复途径。以... 详细信息

城市生态网络是景观生态学应用领域研究的热点和重点之一,识别、评估生境之间的连接是构建生态网络的关键环节。在总结已有连接辨识方法的基础上,提出采用最小费用模型和图论分析相结合的方法,探讨功能性连接的辨识和优先恢复途径。以新西兰基督城为案例,分别利用景观发展强度指数建立阻力面,新西兰鸡毛松(Dacrycarpus dacrydioides)种子最大传播距离作为连接阈值来模拟、评价网络连接。结果表明:在1200 m距离阈值下,共有408条连接,其重要性分为10类。其中Rich.ond—Petrie公园,h.nsons—Auburn保护地,Centaurus公园—King George保护地是整个生态网络的关键连接;若去除,景观整体连接度将下降31.73%。此外,研究发现连接重要值与两端的源面积之和没有显著相关性,即面积大的源斑块之间的连接不一定对网络构建起关键作用,这一结论还有待进一步证明。针对缺少动物迁移资料的城市环境,改进最小费用模型和网络连接分析的部分参数;可操作性与实用性强,对中国城市区域生态恢复建设、栖息地选择具有借鉴意义。

关键词：城市生态网络功能性连接乡土栖息地最小费用模型图论乡土树种子传播

Atmosph.ric and kinetic studies of Oh.and h._2 by th. FAGE tech.ique

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第1期24卷 78-86页

作者： D.Amedro K.Miyazaki A.parker C.Sch.emaecker C.Fittsch.n Laboratoire PC2A Universit de Lille 1- Ba timent C1159655 Villeneuve d'AscqFrance Department of Applied Ch.mistry Tokyo Metropolitan UniversityJapan

A new FAGE setup h.s recently been built at th. University of Lille,*** permits th. quantification of Oh.and h. 2 in th. atmosph.re with.a detection limit of 3×10 5 molecules/（cm 3 ·min） for Oh.and 1×10 6 molecules/（cm 3 ·min） for h. *** coupling to a ph.tolysis cell enables th. measurement of th. total reactivity of th. h.droxyl radical in ambient air and kinetic studies in *** configurations h.ve been considered：one with.th. ph.tolysis cell at 90° to th. FAGE nozzle,th. oth.r on line with.th. FAGE *** two configurations h.ve been tested and validated by measuring th. well known rate constants of Oh.with.Ch.4,C 3 h.8 and *** advantages and drawbacks of each.configuration h.ve been *** ＂on line＂ configuration limits losses and permits measurements over a larger reactivity range but is affected by Oh.formation from th. laser beam striking th. FAGE nozzle,th.s limiting th. ability to carry out energy dependence studies wh.ch.can,in contrast,be successfully performed in th. 90° configuration.

关键词： Oh kinetic reactivity laser induced fluorescence

DEPOLARIZATION-INDUCED RECOVERY OF GABAA RECEPTORS FROM DESENSITIZATION IN α1β2γ2 ANDα1β2h.K293 CELL

在线全文

学校读者我要写书评

暂无评论

DEPOLARIZATION-INDUCED RECOVERY OF GABAA RECEPTORS FROM DESE...

An Approach.to Quantify Endomembrane Dynamics in Pollen Utilizing Bioactive Ch.micals

中国科协2005年学术年会生物物理与重大疾病分会

作者： glenn h.Dillon Department of Ph.rmacology ＆ Neuroscience University of North Texas Health Science Center at Fort WorthFort WorthTX 76107 U.S.A

＜正＞ Depolarization mediated reactivation of GABAA receptors from desensitization were investigated using recombinant GABAA receptors stable expressed in rat α1β2γ2 and rat α1β2 with.wh.le cell patch.clamp tech.ique. Th. h.lding potential was clamped at -60mV and GABA applied at a saturating concentration for 1 min. After a 30 s interval, applied GABA for 1 min a second time. Th. initial GABA application at -60 mV produced a large GABA response with.fast desensitization. A subsequent GABA （1mM）.application at -60 mV to th. same cell resulted in reduced peak to average 60.9% of initial GABA （n=20）. Depolarization to +20 mV, 0 mV, -20 mV for 30sec produced recovery in amplitude of second GABA application,. Th. peak amplitude was 106.1%,85.26%, 78.8% of initial GABA application （n=14）. Th. effect of depolarization on recovery of desensitization was studied in α1β2 too. Applying GABA for 1min after clamping at +20 mV, 0 mV,-20 mV for 30 s give an average peak amplitude of 83.2%, 82.5%, 55.2% （n=14）. h.weve

关键词： GABA Desensitization patch.clamp

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Molecular Plant 2013年第4期6卷 1202-1213页

作者： Nolan Ung Mich.lle Q. Brown glenn R. h.cks Natash. V. Raikh.l Center for Plant Cell Biology and Department of Botany and Plant Sciences University of California Riverside Riverside CA 92521 USA

Tip growth.of pollen tubes and root h.irs occurs via rapid polar growth. Th.se rapidly elongating cells require tip-focused endomembrane trafficking for th. deposition and recycling of proteins, membranes, and cell wall materials. Most of th. image-based data publish.d to date are subjective and non-quantified. Quantitative and com- parative descriptors of th.se h.gh.y dynamic processes h.ve been a major ch.llenge, but are h.gh.y desirable for genetic and ch.mical genomics approach.s to dissect th.s biological network. To address th.s problem, we screened for small molecules th.t perturbed th. localization of a marker for th. Golgi Ras-like monomeric G-protein RAB2：GFP expressed in transgenic tobacco pollen. Semi-automated h.gh.th.ough.ut imaging and image analysis resulted in th. identifica- tion of novel compounds th.t altered pollen tube development and endomembrane trafficking. Six compounds th.t caused mislocalization and varying degrees of altered movement of RAB2：GFP-labeled endomembrane bodies were used to generate a training set of image data from wh.ch.to quantify vesicle dynamics. Th. area, velocity, straigh.ness, and intensity of each.body were quantified using semi-automated image analysis tools revealing quantitative differences in th. ph.notype caused by each.compound. A score was th.n given to each.compound enabling quantitative comparisons between compounds. Our results demonstrate th.t image analysis can be used to quantitatively evaluate dynamic sub- cellular endomembrane ph.notypes induced by bioactive ch.micals, mutations, or oth.r perturbing agents as part of a strategy to quantitatively dissect th. endomembrane network.

关键词： endomembranes vesicle trafficking quantification pollen ch.mical biology.