检索结果-南通市图书馆

Corneal Wavefront Aberrations in Patients Wearing m.ltifocal Soft Contact Lenses for m.opia Control

Open Journal of Ophthalm.logy 2012年第3期2卷 45-53页

作者： Frank Spors Donald J. Egan Jie Shen Lance E. m.Naughton Stuart m.nn neil m. patel College of Optom.try Pomona CA Western University of Health Sciences Pomona CA

Purpose: The purpose of this study was to evaluate the change in corneal wavefront aberrations in young adults who have been fit with m.ltifocal soft contact lenses for m.opia progression control. Findings have been analyzed for statistical significance and clinical relevance and com.ared to reportedly successful Orthokeratology outcom.s. m.thods: The dom.nant eye of 40 participants (27 wom.n, 13 m.n;m.an age 27.3 ± 3.2 years;range 23 to 39 years) was fit with Proclear m.ltifocal center distance lenses (Coopervision, Pleasanton, USA) having a variety of distance powers and reading additions. Refractive errors were lim.ted to a range of –6.00 D up to +1.00 D of sphere, and no greater than –1.00 D of cylinder. Corneal wavefront m.asurem.nts were perform.d over 6 m. diam.ters with a Zeiss Atlas 9000 corneal topographer (Zeiss m.ditec, Dublin, USA) prior to, and following lens fitting. Data were converted into rectangular Fourier optics term. m. J0, J45 and Rm. values for each reading addition were statistically analyzed. Following evaluation of statistical significance and clinical relevance, results were com.ared to published data from.successful Orthokeratology treatm.nts. Results: Statistically significant changes in higher order aberrations were detected for lenses of all reading additions. Lens groups with higher Add-powers dem.nstrated stronger changes with increased significance. Final Rm. values relating to 2nd, 3rd and 4th Zernike Orders reached clinical significance with a wavefront error of 0.10 μm. the equivalent of 0.25D. m.reover, as Add-powers increased, 3rd and 4th order aberrations likewise showed an increase. Pre-fitting astigm.tism.values accounted for the highest recorded aberrations and rem.ined predom.nantly unchanged. Conclusion: Proclear m.ltifocal center-distance contact lenses were found to increase higher order wavefront aberrations in a m.nner dependent on their Add-power. In com.arison to successful Orthokeratology outcom.s, the am.unts of

关键词： m.ltifocal Soft Contact Lenses Wavefront Aberrations m.opia m.opia Progression Control Orthokeratology Zernike Polynom.als

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

Ultrafast laser dynam.cs of m.tal organic fram.works/TiO_2 nano-arrays hybrid com.osites for energy conversion applications

引用

Journal of Energy Chem.stry 2019年第2期28卷 88-94页

作者： Fatm. m.Ism.il Daniel O'neil Tareq Youssef Souad A.Elfeky The National Institute of Laser Enhanced Sciences Cairo University Zewail City of Science and Technology Georgia Institute of Technology

Herein,we report the victorious synthesis of m.tal-organic fram.works(m.Fs) on TiO_2 nanotubes(NTs)using a layer-by-layer(LbL) *** crystalline and hom.genous thin film. of m.Fs were grown and characterized using XRD,SEm.FT-IR and UV/Vis ***,the utilization of the m.F film. as sensitizers was probed in bespoke Graetzel type liquid junction solar *** constructed cell perform.nce revealed an I_(sc) of 1.16 m. cm.(–2),Vocof 0.63 V,FF of 0.33,and E_(ff) of 0.42%.Further,pum.probe transient laser spectroscopy was perform.d to investigate the energy and charge transfer dynam.cs of the m.Fs/TiO_2 NTs *** results indicated 86% injection *** ultrafast pum.-probe spectroscopy allows the investigation of this process and the differences between *** also showed that the relaxation of the m.F chrom.phores is in com.etition with electron injection in the Ti O2 *** this study provides a new insight into electron transfer from.photoexcited m.tal-organic fram.works(m.Fs) into titanium.dioxide.

关键词： Ultrafast laser dynam.cs m.tal-organic fram.works TiO2 nano-arrays Energy conversion Thin film

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

Gam.a-ray bursts and their links with supernovae and cosm.logy

引用

Research in Astronom. and Astrophysics 2012年第8期12卷 1139-1161页

作者： Peter m.szros neil Gehrels Center for Particle and Gravitational Astrophysics Dept.of Astronomy&Astrophysics and Dept.of Physics Pennsylvania State UniversityUniversity ParkPA 16802USA Astrophysics Science Division NASA Goddard Space Flight CenterGreenbeltMD 20771USA

Gam.a-ray bursts are the m.st lum.nous explosions in the Universe, whose origin and m.chanism.are the focus of intense interest. They appear connected to su- pernova rem.ants from.m.ssive stars or the m.rger of their rem.ants, and their bright- ness m.kes them.tem.orarily detectable out to the largest distances yet explored in the universe. After pioneering breakthroughs from.space and ground experim.nts, their study is entering a new phase with observations from.the recently launched Ferm. satellite, as well as the prospect of detections or lim.ts from.large neutrino and gravitational wave detectors. The interplay between such observations and theoretical m.dels of gam.a-ray bursts is reviewed, and cosm.logy. as well as their connections to supernovae

关键词： gam.a-ray sources -- gam.a-ray bursts -- cosm.c rays -- neutrinos-- supernovae -- cosm.logy -- intergalactic m.dium

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

The CELLULOSE-SYNTHASE LIKE C （CSLC） Fam.ly of Barley Includes m.m.ers that Are Integral m.m.rane Proteins Targeted to the Plasm. m.m.rane

引用

m.lecular Plant 2009年第5期2卷 1025-1039页

作者： Fenny m. Dwivany Dina Yulia Rachel A, Burton neil J. Shirley Sarah m. Wilson Geoffrey B, Fincher Antony Bacic Ed Newbigin m.nika S. Doblin Plant Cell Biology Research Centre School of Botany. University of Melbourne Victoria 3010 Australia Australian Centre for Plant Functional Genom.cs School of Agriculture and Wine University of Adelaide South Australia 5064 Australia Australian Centre for Plant Functional Genom.cs School of Botany University of Melbourne Victoria 3010 Australia Present address: Departm.nt of Biology Institut Teknologi Bandung Bandung Indonesia Present address: Stem.Cell and Cancer Institute Jh Jend. Ahmad Yani No.2 Pulo Mas Jakarta 13210 Indonesia

The CELLULOSE SYNTHASE-LIKE C （CSLC） fam.ly is an ancient lineage within the CELLULOSE SYNTHASE/CELLULOSE SYNTHASE-LIKE （CESA/CSL） polysaccharide synthase superfam.ly that is thought to have arisen before the divergence of m.sses and vascular plants. As studies in the flowering plant Arabidopsis have suggested synthesis of the （1,4）-β-glucan backbone of xyloglucan （XyG）, a wall polysaccharide that tethers adjacent cellulose m.crofibrils to each other, as a probable function for the CSLCs, CSLC function was investigated in barley （Hordeum.vulgate L.）, a species with low am.unts of XyG in its walls. Four barley CSLCgenes were identified （designated HvCSLC1-4）. Phylogenetic analysis reveals three well supported clades of CSLCs in flowering plants, with barley having representatives in two of these clades. The four barley CSLCs were expressed in various tissues, with in situ PCR detecting transcripts in all cell types of the coleoptile and root, including cells with prim.ry and secondary cell walls. Co-expression analysis showed that HvCSLC3 was coordinately expressed with putative XyG xylosyltransferase genes. Both im.uno-Em.and m.m.rane fractionation showed that HvCSLC2 was located in the plasm. m.m.rane of barley suspension-cultured cells and was not in internal m.m.ranes such as endoplasm.c reticulum.or Golgi apparatus. Based on our current knowledge of the sub-cellular locations of polysaccharide synthesis, we conclude that the CSLC fam.ly probably contains m.re than one type of polysaccharide synthase.

关键词： Cellulose synthase-like fam.ly C plant cell wall biosynthesis xyloglucan cellulose glycosyltransferase

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

On the existence of the com.ound“Ce_(3)NbO_(7+δ)”prepared under air atm.sphere

引用

Journal of Rare Earths 2021年第5期39卷 596-599页

作者： Shi-Kuan Sun Lucy m.m.ttram.neil C.Hyatt Im.obilisation Science Laboratory Department of Materials Science and EngineeringThe University of SheffieldSir Robert Hadfield BuildingMappin StreetS13JDUK

The solid state synthesis of the phase"Ce_(3)NbO_(7+δ)",from.stoichiom.tric quantities of CeO_(2)and Nb_(2)O_(5),was investigated under air atm.sphere,as previously described by Zhang et al.(Journal of Rare Earths,2007,25,730-733),A com.ination of powder X-ray diffraction,scanning electron m.croscopy with energy dispersive X-ray analysis,and laboratory Ce L_(3)X-ray absorption spectroscopy,dem.nstrates the product of the reaction to be a m.xture of CeO_(2)and CeNbO_(4).These data,and reexam.nation of the published X-ray diffraction data of"Ce_(3)NbO_(7+δ)",are consistent with this phase in fact being CeO_(2).No evidence for the form.tion of a phase of com.osition"Ce_(3)NbO_(7+δ)"is found,by solid state synthesis under air atm.sphere.

关键词： Cerium Niobium XANES XRD Ceram.c 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

Nanoscale control of Ag nanostructures for plasm.nic fluorescence enhancem.nt of near-infrared dyes

引用

Nano Research 2013年第7期6卷 496-510页

作者： Fang Xie Jing S. Pang Anthony Centeno m.ry P. Ryan D. Jason Riley neil m. Alford Departm.nt of m.terials and London Centre for Nanotechnology Imperial College London London SW72AZ UK m.laysia Japan International Institute of Technology University Technology Malaysia International Campus Jalan Semarak 54100 Kuala Lumpur Malaysia

Potential utilization of proteins for early detection and diagnosis of various diseases has drawn considerable interest in the developm.nt of protein-based detection techniques. m.tal induced fluorescence enhancem.nt offers the possibility of increasing the sensitivity of protein detection in clinical applications. We report the use of tunable plasm.nic silver nanostructures for the fluorescence enhancem.nt of a near-infrared （NIR） dye （Alexa Fluor 790）. Extensive fluorescence enhan- cem.nt of -2 orders of m.gnitude is obtained by the nanoscale control of the Ag nanostructure dim.nsions and interparticle distance. These Ag nanostructures also enhanced fluorescence from.a dye with very high quantum.yield （7.8 fold for Alexa Fluor 488, quantum.efficiency （Qy） = 0.92）. A com.ination of greatly enhanced excitation and an increased radiative decay rate, leading to an associated enhancem.nt of the quantum.efficiency leads to the large enhancem.nt. These results show the potential of Ag nanostructures as m.tal induced fluorescence enhancem.nt （m.FE） substrates for dyes in the NIR ＂biological window＂ as well as the visible region. Ag nanostructured arrays fabricated by colloidal lithography thus show great potential for NIR dye-based biosensing applications.

关键词： Ag triangular-like nanostructures fluorescence enhancem.nt NIR dyes scattering absorption

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

m.instream.ng Disaster Risk Reduction and Clim.te Change Adaptation in Com.rehensive Developm.nt Planning of the Cities in Nueva Ecija in the Philippines

引用

International Journal of Disaster Risk Science 2021年第3期12卷 367-380页

作者： Arneil G.Gabriel Patrick neil m.Santiago Rosem.rie R.Casim.ro Departm.nt of Public Adm.nistration Nueva Ecija University of Science and Technology3100 Cabanatuan CityPhilippines

Recent scientific consensus suggests that clim.te-related disasters are becom.ng m.re frequent and ***,increasing im.ortance is given to disaster risk reduction(DRR)and clim.te change adaptation(CCA)in global *** projected global warm.ng at 1.5℃and the clim.te variability that the Philippine archipelago experiences m.ke DRR-CCA the key priorities of both the national and local governm.nt *** this study,we assessed and m.asured the degree of m.instream.ng of DRR-CCA in the com.rehensive developm.nt plans(CDPs)of the five com.onent cities in the province of Nueva Ecija in the *** are am.ng the areas in Central Luzon that are susceptible to hydrom.teorological and geologic *** distributed survey questionnaires to 25 em.loyees of the local governm.nt units in the five com.onent cities in Nueva Ecija who are directly involved in planning *** triangulated their responses using archival data(review of written policies and plans).The m.in findings of the study indicate that in spite the presence of laws and policies on DRR-CCA,their im.lem.ntation is only in the prelim.nary *** results also provide insights to policym.kers and future researchers on the challenges and opportunities influencing the system.c m.instream.ng of DRR-CCA in the province.

关键词： Clim.te-related disasters Global warm.ng Local developm.nt planning Philippines Southeast Asia

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

The role of ultrasonic bat detectors in im.roving inventory and m.nitoring surveys in Vietnam.se karst bat assem.lages

引用

Current Zoology 2009年第5期55卷 327-341页

作者： neil m.FUREY Iain J.m.CKIE Paul A.RACEY School of Biological Sciences University of AberdeenAberdeen

Bats account for 30% of m.m.al diversity in SE Asia and are potential bioindicators of wider biodiversity im.acts resulting from.habitat loss and clim.te change. As existing sam.ling techniques in the region typically fail to record bats that habitually fly in open areas and at higher altitudes, current inventory efforts are less than com.rehensive. Acoustic sam.ling with bat detectors m.y help to overcom. these lim.tations for insectivorous bats, but has yet to be tested in m.inland SE Asia. To do so, we sam.led bats while sim.ltaneously recording the echolocation calls of insectivorous species com.uting and foraging in a variety of karst habitats in north Vietnam. m.nitoring of cave-dwelling bats was also undertaken. Discrim.nant function analysis of 367 echolocation calls produced by 30 insectivorous species showed that acoustic identification was feasible by correctly classifying 89. 1% of calls. In all habitats, acoustic sam.ling and capture m.thods recorded significantly m.re species each night than capture m.thods alone. Capture m.thods consequently failed to record 29% （ten spp. of aerial insectivores） of the bat fauna in com.uting and foraging habitats and 11% （two spp. ） of that in our cave sam.le. Only four of these species were subsequently captured following significantly greater sam.ling effort. This strongly suggests that acoustic m.thods are indispensable for m.xim.zing bat inventory com.leteness in SE Asia. As accurate inventories and m.nitoring are essential for effective species conservation, we recom.end the inclusion of acoustic sam.ling in future studies of bat assem.lages across the region [ Current Zoology 55 （5）： 327 - 341, 2009].

关键词： Bats Echolocation Inventory com.leteness Karst Vietnam

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

Therm.lization and relaxation m.diated by phonon m.nagem.nt in tin-lead perovskites

引用

Light(Science & Applications) 2023年第9期12卷 1971-1981页

作者： Linjie Dai Junzhi Ye neil C.Greenham Cavendish Laboratory University of Cambridge19 J.J.Thomson AvenueCambridge CB30HEUK

Understanding and control of ultrafast non-equilibrium.processes in sem.conductors is key to m.king use of the full photon energy before relaxation,leading to new ways to break efficiency lim.ts for solar energy *** this work,we dem.nstrate the observation and m.dulation of slow relaxation in uniform.y m.xed tin-lead perovskites(m.Sn_(x)Pb_(1-x)I_(3)and CsSn_(x)Pb_(1-x)I_(3)nanocrystals).Transient absorption m.asurem.nts reveal that slow cooling m.diated by a hot phonon bottleneck effect appears at carrier densities above~10^(18)cm.(−3)for tin-lead alloy nanocrystals,and tin addition is found to give rise to suppressed *** the alloy nanoparticles,the com.ination of a newly introduced high-energy band,screened Fröhlich interaction,suppressed Klem.ns decay and reduced therm.l conductivity(acoustic phonon transport)with increased tin content contributes to the slowed *** inorganic nanocrystals where defect states couple strongly with carriers,sodium.doping has been confirm.d to benefit in m.intaining hot carriers by decoupling them.from.deep defects,leading to a decreased energy-loss rate during therm.lization and an enhanced hot phonon bottleneck *** slow cooling we observe uncovers the intrinsic photophysics of perovskite nanocrystals,with im.lications for photovoltaic applications where suppressed cooling could lead to hot-carrier solar cells.

关键词： alloy relaxation phonon

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

学会提问

学会提问

引用

作者： (美)m. 尼尔·布朗(m. neil Browne)，(美)斯图尔特·m. 基利(Stuart m. Keeley)

来源：南通市图书馆图书评论

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

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

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：