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Long-term effect of fire on herbaceous species diversity in oriental beech (Fagus orientalis Lipsky) forests in northern Iran

中国神经科学学会第十二届全国学术会议

作者： Lin XIAO david Ohayon Ian A.McKenzie Alexander Sinclair-wilson Jordan Wright Alexander Fudge Ben Emery Hui-Liang LI William D Richardson Wolfson Institute for Biomedical Research University College London Institute of Neuroscience Second Military Medical University Centre de Biologie du Développement University Paul Sabatier Jungers Center for Neurosciences Research Oregon Health and Science University

Objective To investigate the possible role of oligodendrocyte in learning. Methods By searching published expression databases, we identified a novel marker of newly-forming oligodendrocytes – the ecto-enzyme Enpp6 – and used this to track oligodendrocyte differentiation in adult mice as they learned a motor skill(running on a complex wheel with unevenly spaced rungs). Results Production of Enpp6-expressing immature oligodendrocytes was accelerated within just 2.5 hours exposure to the complex wheel in subcortical white matter and within 4 hours in motor cortex. Conditional deletion of Myelin regulatory factor(Myrf) in oligodendrocyte precursors blocked formation of new Enpp6+ oligodendrocytes and impaired learning within the same -3 hour time frame. This very early requirement for oligodendrocytes suggests a direct and active role in learning, closely linked to synaptic strengthening. Running performance of normal mice continued to improve over the following week accompanied by secondary waves of oligodendrocyte precursor proliferation and differentiation. Conclusion We conclude that new oligodendrocytes contribute to both early and late stages of motor skill learning.

关键词： motor learning motor performance skill learning glia oligodendrocyte precursor cell NG2 cell myelin white matter mouse

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Forestry Studies in China 2012年第4期14卷 260-267页

作者： Mohammad Naghi ADEL Hassan POURBABAEI Ali OMIDI david POTHIER Department of Forestry Natural Resources FacultyUniversity of Guilan Department of Forestry Natural Resources Office Centre d'étude de la forêt (CEF) et Département des sciences du bois et de la forêt Pavillon Abitibi-Price2405 rue de la TerrasseUniversité Laval

We studied the long-term impacts of natural burning on herbaceous species diversity 37 years after a fire occurred in the Roudbar forests of Guilan Province, northern Iran. Numerous studies have examined short-term changes in understory vegetation following wildfire; however, very few long-term studies are available or changes inferred from retrospective studies based on chro- nosequences. For this study, 170 ha of forest （85 ha, burned areas; 85 ha, unburned areas） were surveyed. Because the 1000 m2 plots were too large for detailed measurements of herbaceous species, we determined a sub-sample size according to the Whittaker＇s nested plot sampling protocol and minimal areas method. Hence, sub-plots of 32 m2 were used for herbaceous species measurements, which consisted of percent cover of each species based on the Domin criterion. We measured plant diversity （Shannon-Wiener index）, spe- cies richness （Margalef＇s index）, and evenness （Smith-wilson index）. Mean percent cover, together with diversity, richness and even- ness, increased markedly in burned areas compared to unburned controls. This suggests that the biodiversity of these forests could be restored within 37 years after fire. However, the abundance of invasive species such as Rubus fruticosus and Bromus benekenii increased significantly in burned areas, but these could be controlled by relevant silvicultural operations.

关键词： fire diversity richness evenness beech forest northern Iran

口服维生素C对人眼房水中抗坏血酸盐浓度的影响(英文)

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中国药理学报 1999年第10期20卷 879-883页

作者： Zafar IQBAL John M MIDGLEY david G WATSON Stilianous D KARDITSAS Gordon N DUTTON William S wilson Department of Pharmacy University of Strathclyde Glasgow G1 1XW UK Department of PharmacyUniversity of PeshawarPeshawar-25120PakistanDepartment of Pharmacy University of Strathclyde Glasgow G1 1XW UKDepartment of Pharmacy University of Strathclyde Glasgow G1 1XW UKTennent Institute of Ophthalmology Western Infirmary Gtasgow G11 6NT UKTennent Institute of Ophthalmology Western Infirmary Gtasgow G11 6NT UKDepartment of Pharmacology University of Glasgow Glasgow G12 8QQ UK

AIM: To study oral administration of vitamin C onhuman aqueous humour ascorbate ***: High performance liquid chromatography(HPLC) coupled with electrochemical detector (ECD)was used. The effect of oral administraion of variousdoses of ascorbic acid, 0 (control), 1.0, 1.5., 2.0,3.0, and 5.0 g, on its concentration in aqueoushumour, obtained from volunteer cataract patients wasstudied. RESULTS: The concentration of ascorbicacid in aqueous humour of control group

关键词：眼房水抗坏血酸血浆维生素C 氢醒类

Adélie penguins and temperature changes in Antarctica: a long-term view

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Integrative Zoology 2012年第2期7卷 113-120页

作者： Craig D.MILLAR Sankar SUBRAMANIAN Tim H.HEUPINK Siva SWAMINATHAN Carlo BARONI david M.LAMBERT Allan wilson Centre for Molecular Ecology and Evolution University of Auckland Griffith School of Environment and School of Biomolecular and Physical Sciences Griffith UniversityAustralia Environment Protection Training and Research Institute HyderabadIndia Department of Earth Sciences University of PisaPisaItaly

During the summer months,Adélie penguins represent the dominant biomass of terrestrial *** millions of individuals nest in ice-free areas around the coast of the ***,these modern populations of Adélie penguins have often been championed as an ideal biological indicator of ecological and environmental changes that we currently *** addition,Adélie penguins show an extraordinary record of sub-fossil remains,dating back to the late *** this time,temperatures were much lower than ***,this species offers unique long-term information,at both the genomic and ecological levels,about how a species has responded to climate change over more than 40000 years.

关键词： Adélie penguins climate change global warming penguin evolution

具有可调节低临界相转变温度的儿茶酚聚合物的Cu（0）-LRP合成与表面固定化研究

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具有可调节低临界相转变温度的儿茶酚聚合物的Cu（0）-LRP合成与...

Quantitative trait loci controlling Phytophthora cactorum resistance in the cultivated octoploid strawberry(Fragaria×ananassa)

中国化学会2017全国高分子学术论文报告会

作者：王东浩郭书童张强 Paul wilson david M.Haddleton 南京理工大学环境与生物工程学院 Department of Chemistry University of Warwick

该论文通过零价铜调控的可控自由基聚合技术（Cu（0）-LRP）制备了一系列具有不同的微观结构、精确可调的低临界相转变温度和儿茶酚端基的热响应型聚合物。所有的Cu（0）-LRP聚合反应均从未保护的多巴胺基功能引发剂出发,在水体系和室... 详细信息

该论文通过零价铜调控的可控自由基聚合技术（Cu（0）-LRP）制备了一系列具有不同的微观结构、精确可调的低临界相转变温度和儿茶酚端基的热响应型聚合物。所有的Cu（0）-LRP聚合反应均从未保护的多巴胺基功能引发剂出发,在水体系和室温（或冰水浴）下进行,并可在数十分钟的短时间内达到完全转化率。最终的聚合物有着设定的分子量、较窄的分子量分布和端基保持率,可以进行原位的嵌段共聚合反应。这类界定良好的儿茶酚聚合物可以对二氧化钛（Ti O2）纳米材料进行修饰,获得具有自絮凝效应的智能纳米材料。一种"一锅法"策略可以同时实现儿茶酚聚合物的制备与Ti O2纳米材料的表面修饰,从而简化了聚合物纯化和表面接枝修饰的多步反应步骤。研究表明这种热响应型的Ti O2/聚合物杂化材料具有受温度控制的光催化开关和絮凝回收,可以在模拟日光的照射下实现对罗丹明等染料的光催化降解,显示出在水处理领域的潜在应用。

关键词：儿茶酚聚合物可控/活性聚合可调节低临界相转变温度智能纳米材料。

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Horticulture Research 2019年第1期6卷 965-978页

作者： Charlotte F.Nellist Robert J.Vickerstaff Maria K.Sobczyk César Marina-Montes Fiona M.wilson david W.Simpson Adam B.Whitehouse Richard J.Harrison Department of Genetics Genomics and BreedingNIAB EMRNew RoadEast Malling ME196BJUK

The cultivated strawberry,Fragaria×ananassa(Fragaria spp.)is the most economically important global soft *** cactorum,a water-borne oomycete causes economic losses in strawberry production globally.A biparental cross of octoploid cultivated strawberry segregating for resistance to ***,the causative agent of crown rot disease,was screened using artificial *** putative resistance quantitative trait loci(QTL)were identified and *** major effect QTL(FaRPc6C,FaRPc6D and FaRPc7D)explained 37%of the variation *** were no epistatic interactions detected between the three major *** a subset of the mapping population progeny against a range of *** isolates revealed no significant interaction(p=0.0593).However,some lines showed higher susceptibility than predicted,indicating that additional undetected factors may affect the expression of some quantitative resistance *** historic crown rot disease score data from strawberry accessions,a preliminary genome-wide association study(GWAS)of 114 individuals revealed an additional locus associated with resistance to *** of the Fragaria vesca Hawaii 4 v1.1 genome revealed candidate resistance genes in the QTL regions.

关键词： straw Fragaria

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论全球城市的绅士化

中国名城 2012年第11期26卷 4-9页

作者：大卫.威尔逊雷婷美国伊利诺伊大学厄本那-香槟分校地理系上海大学全球学研究中心

围绕未来城市绅士化在全球的发展问题提出六点认识,旨在以后展开进一步深入探讨。主要关注的是城市绅士化在城市更新过程中所引发的争议。城市绅士化涉及到一系列复杂的问题:如私人开发商、建筑商等开始对新的投资机会产生兴趣,瞄准了... 详细信息

围绕未来城市绅士化在全球的发展问题提出六点认识,旨在以后展开进一步深入探讨。主要关注的是城市绅士化在城市更新过程中所引发的争议。城市绅士化涉及到一系列复杂的问题:如私人开发商、建筑商等开始对新的投资机会产生兴趣,瞄准了合适的街区进行改造,当地政府则提供安排吸引投资,促成城区更新;政治上有争议的问题由政府出面,通过城市发展的宣传来应对;另外还包括改造完毕后对相关街区、居民和城市的影响等。

关键词：城市绅士化城市更新贫民区城市问题

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可靠性工程技术在软件中的应用

电子产品可靠性与环境试验 1995年第6期13卷 8-12页

作者： wilson D.Yates Ⅱ St.Louis Dr.david A.shaller St Louis 章有荣 Mcdonnell Aircraft Company University of Missouri-Rolla 电子部14所南京210013

概述工程技术,特别是可靠性工程技术,在软件开发过程中还没有得到广泛的应用。本文主要介绍可靠性工程技术在软件开发中的作用,并分析了为什么软件开发过程中还未使用可靠性设计。可靠性工程工具对改善软件可靠性具有重要的意义,在软... 详细信息

概述工程技术,特别是可靠性工程技术,在软件开发过程中还没有得到广泛的应用。本文主要介绍可靠性工程技术在软件开发中的作用,并分析了为什么软件开发过程中还未使用可靠性设计。可靠性工程工具对改善软件可靠性具有重要的意义,在软件开发过程中是可以起到其作用的。前言在大多数军用装备项目计划中,软件的成本已超过为使其操作运行而设计的硬件成本。图1(参考1)表明了自1955年以来硬件与软件相对成本的变化。软件成本中的大部分是在软件直接交付用户之前程序调试的成本,接下来便是支持和维护以及修改合并的成本。这对交付产品的可靠性是有影响的,因为并不是所有软件的错误在程序调试期间都是可以去掉的。在麦道飞机公司(MCAIR)可靠性工程部门内部。

关键词： FMECA 失效分析软件开发可靠性工程技术

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巴西、泰国持续获得抗逆转录病毒治疗的经验

巴西、泰国持续获得抗逆转录病毒治疗的经验