检索结果-南通市图书馆

Leaf fossils of Sabalites(Arecaceae)from the Oligocene of northern Vietnam and their paleoclimatic implications

Plant Diversity 2022年第4期44卷 406-416页

作者： Ai Song Jia Liu Shui-Qing Liang Truong Van Do Hung Ba Nguyen Wei-Yu-Dong Deng Lin-Bo Jia cedric del rio Gaurav Srivastava Zhuo Feng Zhe-Kun Zhou Jian Huang Tao Su Institute of Palaeontology Yunnan Key Laboratory for PalaeobiologyMEC International Joint Laboratory for Palaeobiology and PalaeoenvironmentYunnan Key Laboratory of Earth System ScienceYunnan UniversityKunming650500China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla666303China Vietnam National Museum of Nature Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoiViet Nam Graduate Academy of Science and Technology Vietnam Academy of Science and Technology18 Hoang Quoc VietHanoiViet Nam CAS Key Laboratory of Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650204China Birbal Sahni Institute of Palaeosciences Lucknow226007India

Recent paleobotanical investigations in Vietnam provide a good opportunity to improve our understanding of the biodiversity and paleoclimatic conditions in the geological past of Southeast ***(Arecaceae)are a diverse family of typical thermophilous plants with a relatively low tolerance for *** this study,we describe well-preserved fossil palm leaves from the Oligocene Dong Ho Formation of Hoanh Bo Basin,northern *** of the fossil leaves,such as a fan-shaped costapalmate lamina,an unarmed petiole,a costa slightly enlarged at the base that then tapers distally into the blade,and well-preserved amphistomatic leaves with cuticles,suggest that they represent a new fossil species,which we herein designate Sabalites colaniae ***,***,*** et *** *** with other paleontological and palaeoclimatic evidence,we conclude that a warm climate prevailed in northern Vietnam and nearby areas during the Oligocene.

关键词： Fossil Leaf Oligocene Paleoclimate Palm 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

藏北班戈盆地中始新世栾树属(Koelrei蒴果瓣膜化石及其生物地理意义

藏北班戈盆地中始新世栾树属(Koelrei蒴果瓣膜化石及其生物地理意...

引用

中国古生物学会古植物学分会、江苏省古生物学会2021年学术年会

作者：陈佩蓉 cedric del rio 王腾翔周浙昆苏涛中国科学院西双版纳热带植物园热带森林生态学重点实验室中国科学院大学

栾树属(Koelreuteria)为无患子科(Sapindaceae)落叶乔木或灌木,本属有3个现代种,间断分布于东亚(中国、韩国和日本)及南太平洋的斐济岛。亚洲地区为该属的物种多样性现代分布中心,该属分化早期的化石记录对于理解其起源与演化过程,以及... 详细信息

栾树属(Koelreuteria)为无患子科(Sapindaceae)落叶乔木或灌木,本属有3个现代种,间断分布于东亚(中国、韩国和日本)及南太平洋的斐济岛。亚洲地区为该属的物种多样性现代分布中心,该属分化早期的化石记录对于理解其起源与演化过程,以及分布历史具有重要意义。本文报道了西藏北部班戈盆地蒋浪剖面(海拔4 850 m)中始新统牛堡组中段的栾树属蒴果瓣膜化石4个形态种,分别为Koelreuteria kvacekii,伦坡拉栾树(***),古全缘栾树(***)和***其中***为一化石新种,其主要特征为:蒴果瓣膜呈扁圆形,全缘。瓣膜顶端微缺到浅裂,基部心形,中部具纵向心皮缝线,隔膜大约从基部延伸到瓣膜长度的一半。侧脉稀疏,略弯曲,以60°-120°自中脉发出达缘,间脉和侧脉构成不规则的多边形网状结构,脉间区横向拉长。种子近球形,每室1～2粒。根据当前化石对应最近亲缘类群的分布区气候条件,并结合研究区伴生化石组合的特征分析结果,表明青藏高原中部中始新世为亚热带湿润环境,与该地区的现代寒冷干燥的气候具有明显差异。这些栾树属化石记录显示,古近纪时青藏高原可能是栾树属植物的一个多样性中心,随后由于青藏高原的剧烈隆升,引起气候环境改变,使得栾树属植物在当地消失。

关键词：蒴果栾树属始新世青藏高原生物地理

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

越南北部渐新世棕榈叶片化石揭示的古气候和古植被区系意义

越南北部渐新世棕榈叶片化石揭示的古气候和古植被区系意义

引用

中国古生物学会古植物学分会、江苏省古生物学会2021年学术年会

作者：宋艾刘佳梁水清 Truong Van Do Hung Ba Nguyen 邓炜煜东贾林波 cedric del rio Gaurav Srivastava 冯卓周浙昆黄健苏涛云南大学古生物研究院中国科学院西双版纳热带植物园 Vietnam National Museum of Nature Vietnam Academy of Science and Technology Graduate Academy of Science and Technology Vietnam Academy of Science and Technology 中国科学院昆明植物研究所 Birbal Sahni Institute of Palaeosciences

棕榈作为典型的热带-亚热带植物,因其耐寒性较差的生理特性,广泛分布于全球低纬度地区。东南亚地区作为目前现生棕榈科植物重要的分布中心之一,关于该区棕榈化石的记录却寥寥无几。本研究报道了越南北部横蒲盆地渐新世Dong Ho组的棕榈... 详细信息

棕榈作为典型的热带-亚热带植物,因其耐寒性较差的生理特性,广泛分布于全球低纬度地区。东南亚地区作为目前现生棕榈科植物重要的分布中心之一,关于该区棕榈化石的记录却寥寥无几。本研究报道了越南北部横蒲盆地渐新世Dong Ho组的棕榈叶片化石,依据扇形肋掌状叶、脊突明显、叶柄无刺以及气孔双生等形态特征,通过对比现生掌状棕榈和相关已发表的棕榈化石,将其定为一个化石新种Sabalites colaniae ***, ***,*** et *** ***.综合研究区其他古生物学和古气候研究,以及棕榈化石的发现,揭示越南北部渐新世气候温暖湿润。此外,通过横蒲植物群与邻近地区同时期云南文山植物群、马关植物群以及周边地区孢粉学研究的植被组成的对比分析,发现越南北部与周边地区在植被组成上具有较高的相似性,认为中南半岛与华南地区的植物区系具有很深的渊源。

关键词：棕榈化石越南北部渐新世古气候植物多样性

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

A deep learning framework to emulate density functional theory

引用

npj Computational Materials 2023年第1期9卷 687-695页

作者： Beatriz G.del rio Brandon Phan Rampi Ramprasad Departamento de Física Teórica Atómica yÓpticaUniversidad de ValladolidPaseo de Belén 747011 ValladolidSpain School of Materials Science and Engineering Georgia Institute of Technology771 Ferst Drive NWAtlantaGA 30332USA

Density functional theory(DFT)has been a critical component of computational materials research and discovery for ***,the computational cost of solving the central Kohn–Sham equation remains a major obstacle for dynamical studies of complex phenomena ***,we propose an end-to-end machine learning(ML)model that emulates the essence of DFT by mapping the atomic structure of the system to its electronic charge density,followed by the prediction of other properties such as density of states,potential energy,atomic forces,and stress tensor,by using the atomic structure and charge density as *** deep learning model successfully bypasses the explicit solution of the Kohn-Sham equation with orders of magnitude speedup(linear scaling with system size with a small prefactor),while maintaining chemical *** demonstrate the capability of this ML-DFT concept for an extensive database of organic molecules,polymer chains,and polymer crystals.

关键词： functional theory system

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

Selective suspension of single layer graphene mechanochemically exfoliated from carbon nanofibres

引用

Nano Research 2014年第7期7卷 963-972页

作者： Antonio Esau del rio-CastilloI Cesar Merino Enrique Diez-Barra Ester Vazquez Departamento de Quimica Orgdnica Facultad de Ciencias y Tecnologfas Qufmicas-IRICA Universidad de Castilla-La Mancha 13071 Ciudad Real Spain Grupo Antolin Ingenieria S.A. Burgos E09007 Spain

This paper presents the first report of the successful ball-milling exfoliation of graphitic filaments （GANF~ carbon nanofibres） into single layer graphene. The addition of small amounts of solvent during the milling process makes it possible to enhance the intercalation of the exfoliating agent （melamine） between the graphene layers, thus promoting exceptional exfoliation. Advantage has also been taken of the fact that the Hansen solubility parameters of graphene are different from those of carbon fibres, which allows single and few-layer graphene to be suspended in a particular solvent, thus discriminating them from poorly exfoliated carbon nanofibres.

关键词： carbon fibre graphene ball-milling exfoliation Hansen solubilityparameters

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

Recent Advances on Early-Stage Fire-Warning Systems: Mechanism, Performance, and Perspective

引用

Nano-Micro Letters 2022年第12期14卷 106-136页

作者： Xiaolu Li Antonio Vazquez-Lopez Jose Sanchez del rio Saez De-Yi Wang IMDEA Materials Institute C/Eric Kandel228906 GetafeMadridSpain E.T.S.de Ingenieros de Caminos Universidad Politecnica de MadridCalle Profesor Aranguren 328040 MadridSpain Departamento de Ingenieria Electrica Electronica Automatica y Fisica AplicadaETSIDIUniversidad Politecnica de MadridRonda de Valencia 328012 MadridSpain

Early-stage fire-warning systems(EFWSs)have attracted significant attention owing to their superiority in detecting fire situations occurring in the pre-combustion *** progress on EFWSs has been achieved recently,and they have presented a considerable possibility for more evacuation time to control constant unintentional fire hazards in our daily *** review mainly makes a comprehensive summary of the current EFWSs,including the working mechanisms and their *** to the different working mechanisms,fire alarms can be classified into graphene oxide-based fire alarms,semiconductor-based fire alarms,thermoelectric-based fire alarms,and fire alarms on other working ***,the challenge and prospect for EFWSs are briefly provided by comparing the art of state of fire *** work can propose a more comprehensive understanding of EFWSs and a guideline for the cutting-edge development direction of EFWSs for readers.

关键词： Smart thermosensitive fire sensors Working mechanism Response time Signal conversion

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

T follicular helper expansion and humoral-mediated rejection are independent of the HVEM/BTLA pathway

引用

Cellular & Molecular Immunology 2017年第6期14卷 497-510页

作者： Jose-Ignacio Rodriguez-Barbosa Carlos Fernandez-Renedo Ana Maria Bravo Moral Leo Biihler Maria-Luisa del rio Transplantation Immunobiology Section Institute of Biomedicine University of Leon and Castilla and Leon Regional Transplantation Coordination Leon University Hospital Leon Spain Department of Veterinary Clinical Sciences University of Santiago de Compostela Veterinary Faculty Lugo Spain Visceral and Transplantation Surgery Department of Surgery University Hospitals of Geneva and Faculty of Medicine Geneva Switzerland

The molecular pathways contributing to humoral-mediated allograft rejection are poorly defined. In this study, we assessed the role of the herpesvirus entry mediator/B- and T-lymphocyte attenuator （HVEM/BTLA） signalling pathway in the context of antibody-mediated allograft rejection. An experimental setting was designed to elucidate whether the blockade of HVEM/BTLA interactions could modulate de novo induction of host antidonor-specific antibodies during the course of graft rejection. To test this hypothesis, fully allogeneic major histocompatibility complex-mismatched skin grafts were transplanted onto the right flank of recipient mice that were treated with isotype control, anti-CD40L or modulatory antibodies of the HVEM/BTLA signalling pathway. The frequencies of CD4 T follicular helper （Tfh） cells （B220-, CD4＋ CXCR5＋ PD-lhigh）, extrafollicular helper cells （B220-, CD4＋ CXCR5- PD-1＋ and PD-1-） and germinal centre （GC） B cells （B220＋Fas＋ GL7＋） were analysed by flow cytometry in draining and non-draining lymph nodes at day 10 post transplantation during the acute phase of graft rejection. The host antidonor isotype-specific humoral immune response was also assessed. Whereas blockade of the CD40/CD40L pathway was highly effective in preventing the allogeneic humoral immune response, antibody-mediated blockade of the HVEM/BTLA-interacting pathway affected neither the expansion of Tfh cells nor the expansion of GC B cells. Consequently, the course of the host antidonor antibody-mediated response proceeded normally, without detectable evidence of impaired development. In summary, these data indicate that HVEM/BTLA interactions are dispensable for the formation of de novo host antidonor isotype-specific antibodies in transplantation.

关键词： BTLA (CD272) humoral immunity HVEM (TNFRSF14, CD270) T follicular helper cells transplantation

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

在KLOE/KLOE-2实验中寻找暗传播子（英文）

引用

中国科学技术大学学报 2016年第7期46卷 587-593页

作者： PEREZ del rio Elena 无弗拉斯卡蒂国家实验室-核物理研究所意大利弗拉斯卡帝00044 kloe-2合作组

一个新的矢量玻色子的存在已经在不同的背景下被提出,这个新矢量玻色子与标准模型粒子的耦合可以通过动力学混合,对U玻色子,或者通过耦合到重子数,对B玻色子.暗物质传播子的直接寻找可以在加速器上进行.DANEΦ-工厂中的KLOE探测器大... 详细信息

一个新的矢量玻色子的存在已经在不同的背景下被提出,这个新矢量玻色子与标准模型粒子的耦合可以通过动力学混合,对U玻色子,或者通过耦合到重子数,对B玻色子.暗物质传播子的直接寻找可以在加速器上进行.DANEΦ-工厂中的KLOE探测器大量研究了U玻色子参与的两种过程:介子的达利兹衰变,即伴随→ηU,U→e+e-过程,以及连续统事件e+e-→Uγ过程.在所有这些过程中,对于质量区间在4 Me V/c2

关键词：暗物质暗能量 U玻色子 A’ 希格斯辐射 h’ 上限

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

HVEM,a cosignaling molecular switch,and its interactions with BTLA,CD160 and LIGHT

引用

Cellular & Molecular Immunology 2019年第7期16卷 679-682页

作者： Jose Ignacio Rodriguez-Barbosa Pascal Schneider Andreas Weigert Kyung-Mi Lee Tae-Jin Kim Jose-Antonio Perez-Simon Maria-Luisa del rio Transplantation Immunobiology Section Research Institutes of the University of LeonCampus of Vegazana s/n24071 LeonSpain Leon Regional Transplantation Coordination Center Leon University HospitalLeonSpain Acción Estratégica en Salud Consorcio CIBER-ONCSevilleSpain Department of Biochemistry University of Lausanne1066 EpalingesSwitzerland Institute of Biochemistry I Faculty of MedicineGoethe-University Frankfurt60590 FrankfurtGermany Department of Biochemistry and Molecular Biology Korea University College of MedicineSeoul 02841Republic of Korea Department of Biomedical Engineering Center for Bio-Integrated ElectronicsSimpson Querrey Institute for BioNanotechnologyNorthwestern UniversityEvanstonIL 60208USA Department of Hematology Virgen del Rocio University HospitalBiomedical Institute of SevillaSevillaSpain

Temporal and spatial expression of cosignaling receptors and their ligands regulates the early stages of T-cell activation(signal 1,T-cell receptor(TCR)signaling and signal 2,costimulation/coinhibition),clonal expansion and T-cell survival during their differentiation towards effector T *** the inflammatory stimulus is eliminated,effector T cells return to homeostasis after undergoing a contraction phase by activation-induced cell death and the intervention of ligands for coinhibitory receptors,leaving a population of long-term memory T *** expression of ligands for coinhibitory receptors on hematopoietic cells and,more importantly,on non-hematopoietic cells of peripheral tissues is a key process in tuning the functional activity of effector T cells to prevent excess tissue inflammation that may lead to immunopathology and subsequent tissue dysfunction.

关键词： stimulation homeostasis inflammation

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

Interpretation of Data in Psychology： A False Problem, a True Issue

引用

Journal of Philosophy Study 2015年第1期5卷 54-62页

作者： Maria del rio Carral Marie Santiago-delefosse University of Lausanne

In psychology, the concept of interpretation has been namely associated to the subjectivist paradigm underpinning qualitative approaches, rather than the objectivist paradigm charactefising quantitative research. In this article, we challenge this belief by showing how interpretation concerns psychology as a whole. To do this, the authors will first consider some dominant tendencies characterising the psychological field in general, such as the ＂empiricist illusion＂ and the ＂trap of scientism＂（Vygotsky 1999）. Moreover, they will introduce the cultural perspective in psychology, pertinent to deconstruct several assumptions regarding research within the discipline. Stemming from this approach, ＂indirect methods＂ will be presented with regard to their potential to analyse psychological phenomena both qualitatively and scientifically. They will conclude by describing a set of principles that can be implemented when doing qualitative research as to ensure the quality and the adequacy of interpretation.

关键词： qualitative research interpretation empiricist illusion indirect methods critical psychology

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

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

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

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：