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Genomic and mitochondrial evidence of ancient isolations and extreme introgression in the four-lined snake

Current Zoology 2020年第1期66卷 99-111页

作者： evanthia THANOU Panagiotis KORNILIOS Petros LYMBeRAKIS Adam D.LeACHe Department of Biology University of WashingtonSeattleWAUSA The Molecular ecology Backshop LoutrakiGreece Institute of evolutionary Biology(CSIC-Universitat Pompeu Fabra) BarcelonaSpain Natural History Museum of Crete University of CreteIrakleioGreece

Comparing mitochondrial and genomic phylogenies is an essential tool for investigating speciation processes,because each genome carries different inheritance properties and evolutionary ***,mitonuclear discordance may arise from ecological adaptation,historic isolation,population size changes,and sex-biased *** related taxa are expected to experience gene flow;however,this may not be true for insular populations or populations isolated in *** four-lined snake elaphe quatuorlineata has a fragmented distribution,separating populations of the Italian and Balkan Peninsulas,whereas several insular Aegean populations of significantly smaller body size(Cyclades island group and Skyros Island,Greece)are currently considered distinct *** constructed the species-tree phylogeny of this species utilizing genome-wide single nucleotide polymorphisms and a gene-tree based on complete cytochrome b sequences,aiming to detect convergence and discrepancies between biparentally and maternally inherited *** structuring,phylogenetic patterns and migration events among geographically defined lineages supported our hypothesis of isolation in multiple *** biogeographical barriers did not restrict subsequent dispersal,extensive genetic exchange occurred between mainland Balkan *** process has led to the mitochondrial sweep of an ancestral mitolineage that survived only in peripheral(east Greece)and insular populations(North Cyclades and Skyros).The Central Cyclades represent an ancient lineage for both molecular markers that emerged almost 3.3 *** their distinct morphology,insular *** populations should be the future focus of an extensive sampling,especially since the mitonuclear discordance observed in this species could be related to ecological adaptations,such as the island-dwarfism phenomenon.

关键词： Aegean Islands elaphe quatuorlineata species-tree genome-wide SNPs mitochondrial introgression phylogeography refugia within refugia

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Coating doxycycline on titanium-based implants: Two in vivo studies

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Bioactive Materials 2020年第4期5卷 787-797页

作者： Maryam Rahmati Ståle Petter Lyngstadaas Janne e.Reseland Ingrid Andersbakken Heidi Straume Haugland Mónica López-Peña Antonio Gonzalez Cantalapiedra Fernando Maria Guzon Muñoz Håvard Jostein Haugen Department of Biomaterials Institute of Clinical DentistryUniversity of Oslo0317OsloNorway Universidade de Santiago de Compostela Facultad de Veterinaria Campus Universitarios/n27002LugoSpain

Regardless of the substantial progress in designing titanium-based dental implants and aseptic techniques,infection remains as the most common complication after implantation ***,having a weakened immune system or systematic diseases is not seen as contraindicated for dental implants anymore,controlling the immune system is required to avoid surgical site infections after *** patients have to control the surgical site infections by taking a high daily dose of oral antibiotics after dental *** antibiotics oral administration has many side effects such as gastrointestinal symptoms,skin rashes and *** antibiotics on the biomaterials surface could be a promising solution to reduce these disadvantages through locally releasing antibiotics in a controlled *** aim of this study was to investigate the effects of doxycycline coating layer on titanium-zirconium alloy surfaces in vitro and in *** our previous studies,we demonstrated the chemical presence of doxycycline layer in *** this study,we examined its physical presence using field emission scanning electron microscope and confocal *** also analyzed its controlled released manner using Nano-Drop UV Vis *** in vitro characterization of the coating layer,we evaluated its effects on the implant osseointegration in dogs and *** histological and histomorphometrical results exhibited no significant difference between doxycycline coated and uncoated groups regarding the implants osseointegration and biocompatibility for dental ***,coating a doxycycline layer on TiZr implants could be favorable for reducing or removing the antibiotics oral administration after the implantation surgery.

关键词： Titanium-zirconium Doxycycline Antibiotic Coating SLActive

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静息态功能MRI在首诊精神分裂症患者中的应用观察

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中国CT和MRI杂志 2020年第1期18卷 35-37页

作者：阿提坎·台外库里新疆喀什地区第一人民医院综合精神一科新疆844000

目的探讨静息态功能磁共振成像(f MRI)在首诊精神分裂症患者中的应用价值。方法选取2016年1月-2018年9月间收治的42例精神分裂症患者(观察组)和40例志愿者(对照组)作为研究对象,两组均行f MRI检查。比较两组功能连接异常的脑区。结果观... 详细信息

目的探讨静息态功能磁共振成像(f MRI)在首诊精神分裂症患者中的应用价值。方法选取2016年1月-2018年9月间收治的42例精神分裂症患者(观察组)和40例志愿者(对照组)作为研究对象,两组均行f MRI检查。比较两组功能连接异常的脑区。结果观察组与对照组对比,精神分裂症患者左侧楔前叶、扣带回、左侧中央前回、双侧中央后回、双侧舌回、右侧颞中回、右侧颞上极、左侧颞横回、双侧顶上小叶、左侧岛叶功能连接异常增强(P<0.05),精神分裂症患者左侧额中回、左侧顶下小叶、双侧额上回、右侧眶下回功能接连异常减弱(P<0.05)。结论静息态f MRI能有效显示首诊精神分裂症患者的多个脑区功能连接异常及其变化。

关键词：精神分裂症首诊患者静息态功能磁共振成像

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Subtle Variations in Surface Properties of Black Silicon Surfaces Influence the Degree of Bactericidal efficiency

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Nano-Micro Letters 2018年第2期10卷 239-246页

作者： Chris M.Bhadra Marco Werner Vladimir A.Baulin Vi Khanh Truong Mohammad Al Kobaisi Song Ha Nguyen Armandas Balcytis Saulius Juodkazis James Y.Wang David e.Mainwaring Russell J.Crawford elena P.Ivanova School of Science Faculty of Science Engineering and Technology Swinburne University of Technology Departament d’enginyeria Química Universitat Rovira i Virgili Melbourne Center for Nanofabrication School of Science RMIT University

One of the major challenges faced by the biomedical industry is the development of robust synthetic surfaces that can resist bacterial colonization. Much inspiration has been drawn recently from naturally occurring mechano-bactericidal surfaces such as the wings of cicada(Psaltoda claripennis) and dragonfly(Diplacodes bipunctata) species in fabricating their synthetic analogs. However,the bactericidal activity of nanostructured surfaces is observed in a particular range of parameters reflecting the geometry of nanostructures and surface wettability. Here,several of the nanometer-scale characteristics of black silicon(bSi) surfaces including the density and height of the nanopillars that have the potential to influence the bactericidal efficiency of these nanostructured surfaces have been investigated. The results provide important evidence that minor variations in the nanoarchitecture of substrata can substantially alter their performance as bactericidal surfaces.

关键词： Black silicon Nanoarchitecture Bactericidal efficiency Deep reactive ion etching(DRIe) Neural network analysis

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MULTISCale HUMAN VISION SIMULATION FOR IMAGe SeGMeNTATION

MULTISCALE HUMAN VISION SIMULATION FOR IMAGE SEGMENTATION

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26th Session of the CIe

作者： e.Rollo N.Richard C.Fernandez-Maloigne SIC laboratory.University of Poitiers Bvd Marie et Pierre curie.Teleport 2.86962 Futuroscope Chasseneuil Cedex France SIC laboratory.University of Poitiers Bvd Marie et Pierre curie.Teleport 2.86962 Futuroscope Chasseneuil Cedex France SIC laboratory.University of Poitiers Bvd Marie et Pierre curie.Teleport 2.86962 Futuroscope Chasseneuil Cedex France

＜正＞In this paper we present a new approach in order to develop a robust segmentation algorithm taking into account perceptual features of the Human Visual System（HVS）.Many segmentation methods show some weaknesses to deal with irrelevant or irregular textured *** a watershed transform,we propose to extend the well-known segmentation algorithm *** the J criterion with the distance berween the colour of the processed pixel and the mean perceived colour at a selected *** is defined by the colour information perceived by the HVS when the distance from the observer to the image grows *** combine J criterion and colour gradient and show how to improve this by removing the irrelevant detection of chaotic texture patterns,These patterns appear mainly on natural scene,in objects like grass or hairs,and on noised regions which produce unwanted texture breaks.

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eFFeCT OF COLD-ROLLING ON THe MAGNeTTIC TTRANSITIONS IN Au_(83)Fe_(17)

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Chinese Physics Letters 1988年第3期5卷 129-132页

作者： CHeN Duxing J.Nogues K.V.Rao C.e.Violet *** Department of Solid State Physics Royal Institute of TechnologyStockholmSweden Central Iron and Steel Research Institute Beijing Lawrence Livermore Labs. LivermoreCA94550

The temperature dependences of the dynamic-elastic and viscous susceptibilities have been measured for Au83Fe17, after cold-rolling. It is found that cold-rolling reduces the curie.temperature and raises the spin-freezing temperature remarkably. These results can be explained on the basis of the precipitation medal proposed by Borg and Violet.

关键词： freezing viscous remarkably

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V掺杂对Bi_(3.25)La_(0.75)Ti_3O_(12)层状结构铁电陶瓷电性能的影响

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稀有金属材料与工程 2009年第A2期38卷 301-304页

作者：王晓军黄平崔彩娥太原理工大学山西太原030024

用高温固相烧结法制备了V5+掺杂的Bi3.25La0.75Ti3O12(BLT)层状结构铁电陶瓷。利用XRD对Bi3.25La0.75Ti3-xVxO12+x/2(BLTV-x)材料结构进行了晶相分析,结果表明所制备的陶瓷均具有单一的正交相结构。样品的介电常数温度谱显示:V5+掺杂提... 详细信息

用高温固相烧结法制备了V5+掺杂的Bi3.25La0.75Ti3O12(BLT)层状结构铁电陶瓷。利用XRD对Bi3.25La0.75Ti3-xVxO12+x/2(BLTV-x)材料结构进行了晶相分析,结果表明所制备的陶瓷均具有单一的正交相结构。样品的介电常数温度谱显示:V5+掺杂提高了材料的介电常数,x=0.03时介电常数最大,但样品的居里温度并没有发生大的变化。样品的介电损耗谱表明:由于V5+掺入,由氧空位引起的样品介电损耗被极大的压制,在x=0.06时损耗最小。通过对材料的直流电导与温度关系的Arrhenius拟合,分析了样品的导电机理,结果显示V5+的掺杂大大降低了材料中氧空位的浓度,使得陶瓷样品的电性能得到了很好的改善。

关键词：介电损耗激活能电导率 Bi3.25La0.75Ti3-xVxO12+x/2

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Tougher metallic glasses through quantum assisted design

Tougher metallic glasses through quantum assisted design

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第十三届全国物理力学学术会议

作者： X.F.Wang T.e.Jones Y.Wu Z.P.Lu S.Halas T.Durakiewicz M.e.eberhart Key Laboratory of Low Dimensional Materials and Application Technology (inistry of education) Xiangtan University School of Physics The University of Sydney State Key Laborato Mry for Advanced Metals and Materials University of Science and Technology Beijing Institute of Physics Maria Curie-Sklodowska University Los Alamos National Laboratory Molecular Theory Group Colorado School of Mines

Bulk metallic glasses(BMGs)are characterized by a number of remarkable physical and me-chanical ***,these same materials are often intrinsically brittle,which limits their *** a consequence considerable efforts have been expended searching for correlations between the phenomenologically complex mechanical properties of metallic glasses and more basic and controllable *** such correlation is that between intrinsically brittle behavior in both

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emerging Functionality in Transition-Metal Compounds Driven by Broken Symmetry, Reduced Dimensionality, or Spatial Confinement

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纳米科技 2008年第6期5卷 1-2页

作者： e. Ward Plummer Department of Physics and Astronomy Louisiana State University Baton Rouge LA 70803

2008年10月23—27日，“2008第七届中国纳米科技（武汉）研讨会”在湖北大学隆重召开。*** Snyder （Georgia Institute of Technology）, Prof. Ward Plummer （Oak Ridge National Laboratory and University of Tennessee） , Prof. M.P. Pileni （University of Marie and curie. France）, Prof. Zhong *** （Georgia Institute of Technology, USA）和薛其坤院士（Tsinghua University）、赵东元院士（Fudan University）、李亚栋教授（Tsinghua University）等出席大会并做特邀主题报告。本期摘要介绍美国科学院院士*** Plummer的报告：

关键词：电子材料超导电性磁致电阻复合材料

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Aneuploidy in stem cells

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World Journal of Stem Cells 2016年第6期8卷 216-222页

作者： Jorge Garcia-Martinez Bjorn Bakker Klaske M Schukken Judith e Simon Floris Foijer european Research Institute for the Biology of Ageing University of GroningenUniversity Medical Center Groningen

Stem cells hold enormous promise for regenerative medicine as well as for engineering of model systems to study diseases and develop new drugs. The discovery of protocols that allow for generating induced pluripotent stem cells(IPSCs) from somatic cells has brought this promise steps closer to reality. However,as somatic cells might have accumulated various chromosomal abnormalities,including aneuploidies throughout their lives,the resulting IPSCs might no longer carry the perfect blueprint for the tissue to be generated,or worse,become at risk of adopting a malignant fate. In this review,we discuss the contribution of aneuploidy to healthy tissues and how aneuploidy can lead to disease. Furthermore,we review the differences between how somatic cells and stem cells respond to aneuploidy.

关键词： Chromosomal instability Aneuploidy embryonic stem cells Induced pluripotent stem cells Mesenchymal stem cells

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