检索结果-南通市图书馆

Journal of Palaeogeography 2021年第4期10卷 482-493页

作者： Lu-Liang huang jian-hua jin Cheng Quan Alexei A.Oskolski State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyCASNanjing 210008Jiangsu ProvinceChina School of Earth Science and Resources Chang'an UniversityXi'an 710054Shaanxi ProvinceChina Department of Botany and Plant Biotechnology University of JohannesburgAuckland Park 2006JohannesburgSouth Africa Komarov Botanical Institute of the Russian Academy of Sciences Prof.Popov Str.2St.Petersburg 197376Russia Ab

Mummified fossil woods of Liquidambar from the Miocene of the Guiping Basin of Guangxi and the upper Pleistocene sediments of the Maoming Basin of Guangdong,South China are recognized as the new species Liquidambar guipingensis *** the extant species Liquidambar formosana Hance,*** fossil wood of *** shows the greatest structural affinity to the extant species Liquidambar excelsa(Noronha)Oken,which is widespread from SW China and NE India(Assam)through Myanmar and Malaysia to *** finding of *** may be considered as evidence for the early diversification of this lineage that occurred at least partly outside the modern range of this extant *** fossil wood of *** from the Maoming Basin represents the only Pleistocene megafossil of Altingiaceae known to date,and provides confirmation for its presence in the interglacial vegetation of South China prior the Last Glacial Maximum.

关键词： Altingiaceae Fossil wood Miocene Late Pleistocene South China

Palaeoclimate background of the diverse Eocene floras of South China

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第22期62卷 1501-1503页

作者： jian-hua jin Alexei B. Herman Robert A. Spicer Tatiana M. Kodrul State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China Geological Institute Russian Academy of SciencesMoscow 119017Russia School of Environment Earth and Ecosystem SciencesThe Open UniversityMilton Keynes MK7 6AAUK

Hainan and Guangdong provinces,located in north tropical area and south subtropical area of China respectively,bear one of the highest levels of biodiversity in *** modern floras of Hainan and Guangdong are dominated by pantropical and tropical-subtropical taxa and many of their representative families appeared as early as in the Eocene[1].The Eocene,therefore,represents a crucial stage in the formation of the extant ***,previously the Eocene floras and vegetation were largely studied in mid-

关键词： Palaeoclimate background of the diverse Eocene floras of South China

Late Oligocene Melia(Meliaceae) from the Nanning Basin of South China and it's biogeographical implication

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2021年第3期10卷 334-340页

作者： Wei-Qiu Liu Sheng-Lan Xu Qiong-Yao Fu Cheng Quan jian-hua jin School of Ecology Sun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyCASNanjing 210008Jiangsu ProvinceChina Natural History Museum of Guangxi Nanning 530012Guangxi Zhuang Autonomous RegionChina School of Earth Science and Resources Chang'an UniversityXi'an 710054Shaanxi ProvinceChina

Melia L. is a small genus of only 2–3 species, which is native to Indo-Malesia, India, Pakistan and southern parts of tropical Africa. Fossil records of Melia are known from the early Miocene to the Pleistocene. Here we describe some mummified fossil endocarps of Melia from the upper part of the Yongning Formation(late Oligocene) in Nanning Basin, South China. These well-preserved stony endocarps are 8–14 mm long and 5–9 mm wide, and have 5 locules with a single spindle seed per locule. We interpret these endocarps as the internal remains of a Melia drupe, and assign them as a new species: M. santangensis sp. nov. This is the only fossil record of anatomically preserved Melia found in China, and also the oldest fossil record of Melia so far reported globally. The fossil record confirms the presence of Melia in Asia at the late Oligocene, and provides evidence supporting the distribution and dispersal hypothesis of the Meliaceae.

关键词： Melia Endocarp Mummified fruit Nanning Basin Paleogene

Fertile Woodwardia from the middle Eocene of South China and its implications for palaeogeography and palaeoclimate

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2022年第6期44卷 565-576页

作者： Han-Zhang Song Serge V.Naugolnykh Xin-Kai Wu Xiao-Yan Liu jian-hua jin State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China Geological Institute of Russian Academy of Sciences Moscow119017Russia Contract Affiliation:Kazan Federal University Republic of TatarstanRussia School of Ecology Sun Yat-sen UniversityGuangzhou 510275China School of Geography South China Normal UniversityGuangzhou 510631China

The genus Woodwardia,which together with the genera Anchistea and Lorinseria comprise the subfamily Woodwardioideae of Blechnaceae,has a disjunct distribution across Central and North America,Europe and the temperate to tropical areas of *** records of Woodwardia occur throughout the Paleogene and Neogene of North America,Europe and ***,well-preserved fertile pinna fossils of this genus have not yet been reported in South *** this paper,a new species,*** Naugolnykh et Song,*** described from the middle Eocene of the Changchang Basin,Hainan Island,South *** and micromorphological features of the fertile pinna show a straight pinna rachis,alternate,subtriangular pinnules,acute pinnule apices,almost entire or slightly undulate pinnule margins,long-ovoid sori,stalked sporangia and spores with wing-like folds on the surface,which are characterised in ***,the present fossil is most similar to the extant species Woodwardia japonica,which mostly grows in warm and moist *** discovery of this new species from the Changchang Basin of Hainan Island indicates that this genus has been distributed in the low-latitude tropical regions of South China from as early as the middle *** on this find,and previous studies of other ferns from the same site,we infer that the climate of the Palaeo-Hainan landscape during deposition of the Changchang Formation was warm and humid,similar to conditions prevailing today across this region.

关键词： Woodwardia Eocene Climate Hainan Island South China

The first megafossil of Cibotium within its modern distribution

在线全文

学校读者我要写书评

暂无评论

Journal of Palaeogeography 2023年第1期12卷 96-106页

作者： Jia-Rong Hu Hao Zhang Lu-Liang huang Xin-Kai Wu Robert A.Spicer Cheng Quan jian-hua jin State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina School of Ecology Sun Yat-sen UniversityGuangzhou 510275Guangdong ProvinceChina School of Environment Earth and Ecosystem SciencesThe Open UniversityMilton Keynes MK76AAUK School of Earth Science and Resources Chang'an UniversityXi'an 710054Shaanxi ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina

The‘man fern’(Cibotium,Cibotiaceae),a typical tree fern of tropical and subtropical climates,is today mainly distributed in the Hawaiian Islands,Mesoamerica,and tropical and subtropical regions of East and Southeast *** fossil records of this genus are *** two cases of stem fossils have been reported from the Upper Cretaceous of Iwate-Ken,Japan and the upper Eocene of Oregon,*** this paper,ultimate fertile pinna fossils of Cibotium are described from the Miocene Erzitang Formation of Guiping Basin,Guangxi Zhuang Autonomous Region,South China,which also preserve in situ spores and *** the first global discovery of Cibotium pinna fossils preserving both in situ spores and cuticles,this find enriches the organ types of Cibotium *** is also the first discovery of Cibotium fossils within its modern distribution range,indicating that Cibotium had migrated southwards into its modern distribution by at least the *** on the modern habitat of Cibotium,we infer that the Guiping Basin was under a warm and humid tropical/subtropical climate in the Miocene.

关键词： Cibotium Miocene South China Phytogeography Paleoclimate Paleoecology

Late Oligocene fossil acorns and nuts of Quercus section Cyclobalanopsis from the Nanning Basin,Guangxi,South China

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2023年第4期45卷 434-445页

作者： Xiao-Yan Liu Han-Zhang Song Xin-Kai Wu Jia-Rong Hu Wei-Ye huang Cheng Quan jian-hua jin State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life SciencesSun Yat-sen UniversityGuangzhou 510275China School of Geography South China Normal UniversityGuangzhou 510631China State Key Laboratory of Biocontrol School of EcologySun Yat-sen UniversityGuangzhou 510275China School of Earth Science and Resources Chang'an UniversityXi'an 710054China

Quercus is the largest genus within the Fagaceae and has a rich fossil *** of the fossil material is attributed to the subgenus Quercus based on leaves,pollen or rarely acorns and *** records of *** Cyclobalanopsis characterized by ring-cupped acorns are relatively few and especially those described based on nuts are *** this study,we described four new species of Quercus section Cyclobalanopsis based on mummified acorns and nuts:*** *** et *** ***.,*** *** et *** ***.,*** *** et *** *** *** *** et *** *** species closely resemble the extant species ***,***,***,and *** occurrence of *** Cyclobalanopsis in the Oligocene stratum of Guangxi,South China,suggests that the section has diversified within its extant distribution center since the *** combining records from other areas,we propose that the section first appeared in the middle Eocene of East Asia(Sino-Japan),has diversified in situ with a few elements scattering into West Asia and southern Europe since the Oligocene and Pliocene,respectively,and finally became restricted in East Asia since the *** indicates that the section originated and diversified in East Asia,before spreading into West Asia no later than the Oligocene and into southern Europe by the *** it disappeared from South Europe and West Asia due to the appearance of the(summer dry)Mediterranean climate and widespread cooling during the Pleistocene.

关键词： Quercus section Cyclobalanopsis Fossil acorn and nut Oligocene Guangxi South China

Local magnetic moment oscillation around an Anderson impurity on graphene

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li Zhen Ma jin-hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

Diversity of Symplocos(Symplocaceae,Ericales)at low latitudes in Asia during late Oligocene and Miocene

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Plant Diversity 2024年第6期46卷 812-816页

作者： Sheng-Lan Xu Tatiana Kodrul Mikhail S.Romanov Alexey V.F.Ch.Bobrov Natalia Maslova Shu-Feng Li Qiong-Yao Fu Wei-Ye huang Cheng Quan jian-hua jin Lu-Liang huang State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources School of Life Sciences/School of EcologySun Yat-sen UniversityGuangzhou 510275China Geological Institute Russian Academy of SciencesMoscow 119017Russia Tsitsin Main Botanical Garden Russian Academy of SciencesMoscow 127276Russia Department of Biogeography Geographical FacultyM.V.Lomonosov Moscow State UniversityMoscow 119991Russia Borissiak Paleontological Institute Russian Academy of SciencesMoscow 117997Russia CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303China Natural History Museum of Guangxi Nanning 530012China School of Earth Science and Resources Chang'an UniversityXi'an 710054China

The family Symplocaceae includes over 300 species of trees and shrubs that have a disjunct distribution in the warmtemperate to tropical regions of eastern,southern,and southeastern Asia,eastern Australia,and the *** ... 详细信息

关键词： accommodate eastern latitude

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

土工织物拉拔试验中筋土界面力学特性

上海交通大学学报 2004年第6期38卷 999-1002页

作者：张鹏王建华陈锦剑上海交通大学土木工程系上海200030

针对土工织物筋土接触面的软化和塑性流动现象,根据拉拔试验的结果,提出了剪应力—位移关系的三阶段弹塑性模型.由筋材的受力特性建立微分控制方程,并通过有限差分法进行求解,得到了拉拔试验中的非线性位移、应变、拉力和剪应力等参量.... 详细信息

针对土工织物筋土接触面的软化和塑性流动现象,根据拉拔试验的结果,提出了剪应力—位移关系的三阶段弹塑性模型.由筋材的受力特性建立微分控制方程,并通过有限差分法进行求解,得到了拉拔试验中的非线性位移、应变、拉力和剪应力等参量.算例分析了拉拔试验中的拉拔力—位移关系,并与线弹性模型和双曲线模型分析的结果进行比较.结果表明,分阶段弹塑性模型分析更符合实际情况.

关键词：土工学土工织物拉拔试验弹塑性模型应变软化有限差分法

Stepwise assembly to construct stable copper(I) cluster-based circularly polarized luminescent MOFs

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： jing-Wen Xie Meng-Ting Wang Yan jin Si Li jian-hua Qin Shuang-Quan Zang Tomas C.W.Mak College of Chemistry Henan Key Laboratory of Crystalline Molecular Functional Materials Zhengzhou University College of Chemistry and Chemical Engineering Luoyang Normal University Department of Chemistry The Chinese University of Hong Kong

Circularly polarized luminescence （CPL） materials have been extensively studied in recent years owing to their widespread applications in 3D display,optical storage,optical anti-counterfeiting,and biological imaging,***（I） clusters have emerged as a promising candidate for CPL materials,driven by their cost-effectiveness,superior luminescent properties,precise structure,and low ***,the poor environmental stability of copper（I） clusters renders their synthesis and preservation challenging,thereby significantly impeding their ***,we have designed and synthesised a chiral double-coordinated ligand in order to construct copper（I） cluster nodes that can be further *** anticipated,by utilizing stepwise assembly strategy,a Cu4cluster node co-modified by chiral alkynyl ligands and triphenylphosphine was further assembled with Cd2+ions to obtain 2D layers structure,L/*** L/D-Cu4-Cd exhibits excellent stability and optical properties,including bright yellow emission,solvent-responsive luminescence,and CPL activity with a maximum glumup to 2.0×10-3,which shows potential applications in the WLED and *** interestingly,the material also exhibits deflection ability towards different wavelengths of linearly polarized light,showing certain potential in the preparation of circular polarizer.

关键词：