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Estimation of the density of neural,glial,and endothelial lineage cells in the adult mouse dentate gyrus

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Neural Regeneration Research 2022年第6期17卷 1286-1292页

作者： Joshua D.Rieskamp Patricia Sarchet Bryon m.smith Elizabeth D.Kirby Neuroscience Graduate Program The Ohio State UniversityColumbusOHUSA Department of Psychology The Ohio State UniversityColumbusOHUSA Department of Neuroscience The Ohio State UniversityColumbusOHUSA Chronic Brain Injury Program The Ohio State UniversityColumbusOHUSA

The dentate gyrus subregion of the mammalian hippocampus is an adult neural stem cell niche and site of lifelong *** regarding the role of adult-born neuron synaptic integration in hippocampal circuit function are framed by robust estimations of adultborn versus pre/perinatally-born neuron *** contrast,the non-neurogenic functions of adult neural stem cells and their immediate progeny,such as secretion of bioactive growth factors and expression of extracellular matrix-modifying proteins,lack similar framing due to few estimates of their number versus other prominent secretory ***,we apply immunohistochemical methods to estimate cell density of neural stem/progenitor cells versus other major classes of glial and endothelial cell types that are potentially secretory in the dentate gyrus of adult *** the cell types quantified,we found that GFAP^(+)SOX2^(+)stellate astrocytes were the most numerous,followed by CD31^(+)endothelia,GFAP-SOX2^(+)intermediate progenitors,Olig2^(+)oligodendrocytes,Iba1+microglia,and GFAP^(+)SOX2^(+)radial glia-like neural stem *** did not observe any significant sex differences in density of any cell ***,neural stem/progenitor cells were present at a similar density as several cell types known to have potent functional roles via their *** findings may be useful for refining hypotheses regarding the contributions of these cell types to regulating hippocampal function and their potential therapeutic *** experimental protocols were approved by the Ohio State University Institutional Animal Care and Use Committee(protocol#2016A00000068)on July 14,2016.

关键词： adult neurogenesis dentate gyrus endothelia glia hippocampus neural stem cell secretome stereology

Response of saproxylic insect communities to logging history, tree species, stage of decay, and wood posture in the central Nearctic boreal forest

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Journal of Forestry Research 2018年第5期29卷 1365-1377页

作者： R.W.James Dennis Jay R.malcolm Sandy m.smith m.Isabel Bellocq Faculty of Forestry University of Toronto 33 Willcocks St.Toronto ON M5S 3B3 Canada Departamento de Ecología Genética y EvoluciónFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Aires and IEGEBA (CONICET)Buenos Aires Argentina

Saproxylic insect assemblages are essential functional components of forest ecosystems that can be affected by forest *** used a split-plot ANOVA design to analyze differences in selected saproxylic insects（all arthropod orders and dipteran and parasitic hymenopteran families） emerging from dead wood of sites with different logging histories（horse-logged,mechanically-logged and unlogged）,tree species（Populus and Picea）,stage of decay（early-and late-decay stages） and posture（standing and downed logs） in the boreal forest of central *** clear effects of logging history were seen for the studied taxa; however,interaction between logging history and other dead wood features was *** consistently emerged more from Populus than from Picea dead *** of the studied saproxylic families were more abundant in late-decay than in early-decay *** of the Cecidomyiidae,Ceratopogonidae,Empididae,mycetophilidae and Sciaridae families,and hymenopterans of the Diapriidae and Ichneumonidae families were significantly more abundant in downed than in standing dead *** contrast,mymaridae was most abundant in standing dead *** study provides evidence that some insects at high taxonomic levels respond differently to dead wood quality,and this could inform future management strategies in the boreal forest for the conservation of saproxylic fauna and their ecological functions.

关键词： Boreal forest Dead wood quality Forest harvesting High-level taxa Saproxylic insects

Reaction mechanisms and diagnostic mineralogy of intertidal steel corrosion: An X-ray photoelectron spectroscopy study

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Corrosion Communications 2024年第1期13卷 68-82页

作者： m.smith B.Shibulal H.Burgess I.Cooper N.moles A.Willows School of Applied Sciences University of Brighton

The products of intertidal and super tidal(splash zone) corrosion on steel piles have been characterised at 3 UK sites with contrasting environmental conditions in order to determine corrosion reaction mechanism and if a common mechanism for accelerated low water corrosion occurs across sites. Intertidal corrosion samples at Shoreham and Newhaven ports show an internal composition of iron mono-and bi-sulphide, with intermediate sulphur oxidation state compounds, and an outer surface dominated by iron oxides and oxyhydroxides with a component of iron sulphates. The FTIR spectra are characteristic of sulphate green rust. In contrast, samples from Southend have all sulphur species below detection levels and are dominated by iron oxides and oxyhydroxides. Carbon binding energy spectra are consistent with the development of biofilms at all sites except for a splash zone sample at Southend. The results demonstrate a common mechanism for ALWC at Newhaven and Shoreham, involving the action of sulphate-reducing bacteria generating iron sulphides on the steel surface. These are subsequently oxidised to produce sulphate green rust, which may in turn oxidise to produce lepidocrocite. At Southend differences in environment are inferred to restrict the activity of sulphate reducing bacteria, resulting in direct oxidation of steel to generate iron oxyhydroxide gels, which subsequently recrystallise, dehydrate and oxidise to goethite, magnetite and ultimately hematite in both splash zone and intertidal samples. The multi-technique approach used here characterises the full range of corrosion products.

关键词： Accelerated low water corrosion (ALWC) microbially influenced corrosion (mIC) Green rust X-ray photoelectron spectroscopy (XPS) Fourier transform infrared spectroscopy (FTIR)

JIU GONG SHAN-FATHER OF TEA

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湖北科技学院学报 1993年第1期24卷 67-69页

作者： Nicholas m.smith

By the Qing Dynasty^1 present day Xianning Prefecture was well established as a producerof tea. and for much of that period dealt on the international markets. The rise of thePrefecfure’s tea empires was speedy, but histories of the tea towns leave unanswered thequestion where did all the tea come from? This article postulates that the prefecture’s tea originatedand was first cultivated in an area known as Jiu Gong Shan^2 as early as the Jin Dy-

关键词： cultivated leave Dynasty displayed valuable painting eaves throughout Canton largely

Water balloon-induced orbital fracture in an aviator

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military medical Research 2020年第2期7卷 245-248页

作者： Timothy E.Holland David m.smith Guy N.Gibson Jared G.Brinkerhoff Flight and Operational medical Clinic 78th Medical Group655 Seventh StreetRobins Air Force BaseRobinsGA 31098USA Department of Radiology Ehrling Bergquist Clinic2501 Capehart RdOffutt AFBNEOffutt 68113-2160USA Flight and Operational medical Clinic 5th Medical Group194 Missilie AveMinot AFBNDMinot 58705USA

Background:Orbital fractures are common injuries found in facial *** etiologies of orbital fractures include motor vehicle collisions and *** report the case of a 32-year-old male who suffered an orbital fracture from a water ***,we describe the aeromedical complications that may result from this ***,we attempt to answer the question of when a patient may return to flying after sustaining such an injury through review of the *** presentation:A 32-year-old male pilot with the United States Air Force was at an outdoor event with his unit when he was struck with a water balloon launched from a sling shot into his left *** afterwards,he had an onset of subcutaneous emphysema and was escorted to a nearby Emergency *** tomography identified an orbital fracture with associated orbital and subcutaneous *** patient was evaluated by a plastic surgeon and was determined not to be a surgical *** weeks later,he returned to flying ***:Water balloons are thought to be safe and harmless ***,when coupled with sling shots,water balloons can become formidable projectiles capable of significant orbital injury including orbital *** injuries are concerning to aviators,as the most common sites for fractures of the orbit are the thin ethmoid and maxillary bones adjacent to the *** altitude,gases in the sinuses may expand and enter the orbit through these fractures,which may suddenly incapacitate the *** is important for flight surgeons to identify and assess these individuals to determine suitability for flying.

关键词： Boyle’s law Orbital emphysema Facial fracture

Tailoring spin mixtures by ion-enhanced maxwell magnetic coupling in colortunable organic electroluminescent devices

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Light(Science & Applications) 2018年第1期7卷 629-640页

作者： Junwei Xu Yue Cui Gregory m.smith Peiyun Li Chaochao Dun Linqi Shao Yang Guo Hongzhi Wang Yonghua Chen David L.Carroll Center for Nanotechnology and molecular materials Wake Forest UniversityWinston-SalemNC 27109USA Department of Physics Wake Forest UniversityWinston-SalemNC 27106USA Key Laboratory of Luminescence and Optical Information(ministry of Education) Institute of Optoelectronics TechnologyBeijing Jiaotong University100044 BeijingP.R.China Department of Electro-Optics School of EngineeringUniversity of DaytonDaytonOH 45469USA Department of mathematics Wake Forest UniversityWinston-SalemNC 27106USA State Key Laboratory for modification of Chemical Fibers and Polymer materials 201620 ShanghaiP.R.China College of materials Science and Engineering Donghua University201620 Shanghai P.R.China Institute of Advanced materials Nanjing Tech University211816 NanjingJiangsuP.R.China Department of Physics and Astronomy College of CharlestonCharlestonSC 29424USA

In this work,we show that the spin dynamics of excitons can be dramatically altered by maxwell magnetic field coupling,together with an ion-enhanced,low-internal-splitting-energy organic semiconducting *** employing a unique,alternating current(AC)-driven organic electroluminescent(OEL)device architecture that optimizes this magnetic field coupling,almost complete control over the singlet-to-triplet ratio(from fluorescent to phosphorescent emission in a single device)is *** attribute this spin population control to magnetically sensitive polaron–spin pair intersystem crossings(ISCs)that can be directly manipulated through external driving *** an illustration of the utility of this approach to spin-tailoring,we demonstrate a simple hybrid(double-layer)fluorescence–phosphorescence(F–P)device using a polyfluorene-based emitter with a strong external Zeeman effect and ion-induced long carrier *** control over de-excitation pathways is achieved by controlling the device-driving frequency,resulting in complete emission blue–red color *** photoluminescence(PL)spectroscopy directly confirms that this color control derives from the magnetic manipulation of the singlet-totriplet *** results may pave the way to far more exotic organic devices with magnetic-field-coupled organic systems that are poised to usher in an era of dynamic spintronics at room temperature.

关键词： temperature. coupling maxwell

Exploring the band structure of Wurtzite InAs nanowires using photocurrent spectroscopy

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Nano Research 2020年第6期13卷 1586-1591页

作者： Seyyedesadaf Pournia Samuel Linser Giriraj Jnawali Howard E.Jackson Leigh m.smith Amira Ameruddin Philippe Caroff Jennifer Wong-Leung Hark Hoe Tan Chennupati Jagadish Hannah J.Joyce Department of Physics University of CincinnatiCincinnatiOH45221-0011USA Department of Electronic materials Engineering Research School of PhysicsThe Australian National UniversityCanberraACT2601Australia Department of Engineering University of Cambridge9 JJ Thomson AvenueCambridgeCB30FAUK

Nano Research volume We use polarized photocurrent spectroscopy in a nanowire device to investigate the band structure of hexagonal Wurtzite *** of optical transitions between four valence bands and two conduction bands are observed which are consistent with the symmetries expected from group *** ground state transition energy identified from photocurrent spectra is seen to be consistent with photoluminescence emitted from a cluster of nanowires from the same growth *** the energies of the observed bands we determine the spin orbit and crystal field energies in Wurtzite *** information is vital to the development of crystal phase engineering of this important III-V semiconductor.

关键词： nanowires Wurtzite InAs photocurrent measurement optical selection rules energy band structure

APPLICATION OF WYATT-WHITE mETHOD TO CALCULATING INTRINSIC RATES OF INCREASE FOR HYmENOPTEROUS PARASITOIDS

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Zoological Research 1993年第3期14卷 208-214页

作者：况荣平 Sandy m.smith 中国科学院昆明动物研究所昆明650223 多伦多大学森林系

The method developed by Wyatt and White (1977) was applied to calculate the intrinsic rates of increase for parasitoids based on 23 fecundity data sets from the literature. The studies showed that there existed the linear relationship between the accurate values of rm and In f (md) / d or In (A/d/2) / d, that is, 1) rm= 0.845 In (md) / d or 2) rm= 0.880 In (md/ 2) / d. Where d is the prereproductive time, md is the number of female offspring produced per original female from the first to the dthday of reproduction, and md/2 is the number of female offspring produced per original female from the first to the (d/ 2) th day of reproduction. These equations can provide the accurate estimates of rm for parasitoids in this study. The approach is advantageous because it does not require the construction of detailed fecundity tables for estimating parasitoid rates of increase. Of course, whether these equations are appropriate for the other taxa will need to be further studied.

关键词： Parasitoid Intrinsic rate of increase Calculation

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加筋土挡土墙边坡的稳定性分析

煤田地质与勘探 2003年第2期31卷 42-44页

作者：姚爱国 m.smith 中国地质大学工程学院湖北武汉430074 曼彻斯特大学土木工程系

加筋挡土墙边坡是一种新型的复合边坡加固技术,用传统的方法很难设计这种复杂的结构。以一工程实例叙述了采用弹塑性有限元法预测加筋土边坡的稳定性的方法;给出了不同设计方案下的位移;分析了土体力学参数对边坡最大水平位移的影响。... 详细信息

加筋挡土墙边坡是一种新型的复合边坡加固技术,用传统的方法很难设计这种复杂的结构。以一工程实例叙述了采用弹塑性有限元法预测加筋土边坡的稳定性的方法;给出了不同设计方案下的位移;分析了土体力学参数对边坡最大水平位移的影响。结果表明,土体的弹性模量、内摩擦角与粘聚力是影响边坡位移的重要因素。这些土力学参数与边坡最大水平位移是非线性关系,且有呈现临界点的趋势。因此,适当控制填土的力学性能参数有助于达到安全节省的设计目标。

关键词：加筋土边坡复合结构弹塑性有限元挡土墙稳定性粘聚力