检索结果-南通市图书馆

Reconstructing mean maximum temperature of growing season from the maximum density of the Schrenk Spruce in Yili,Xinjiang,china

引用

chinese Science Bulletin 2009年第13期54卷 2300-2308页

作者： CHEN Jin1,2.3,WANG LiLi1,4,5,ZHU HaiFeng1 & WU Pu1 1 Institute of Geographic sciences and Natural Resources Research,chinese {2. of sciences,beijing 100101,china 2.Graduate University of chinese academy of sciences,beijing 10004.,china 3 Institute of vertebrate paleontology and {12.,chinese {2. of sciences,beijing 10004.,china 4 Institute of Tibetan Plateau Research,chinese {2. of sciences,beijing 100085,china 5 Institute of Desert and Meteorology,china Meteorological Administration,ürümqi 830002.china Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate University of chinese academy of sciences Beijing 100049 China Institute of vertebrate paleontology and {2. Chinese Academy of Sciences Beijing 100044 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Institute of Desert and Meteorology China Meteorological Administration ürümqi 830002 China

To study the historical temperature variation in Yili of Xinjiang,the tree-ring chronologies of maximum density(MXD) and tree-ring width(TRW) were established with the Schrenk Spruce(Picea schrenkiana *** Mey) collected from six sites to analyze the characteristics and ability of response to climate *** results suggest that the MXD chronology of the Schrenk Spruce from different sampling sites responded to climate change well and were positively correlated with the mean maximum temperature and the mean temperature from April to August in the study *** mean maximum temperature anomaly from April to August,spanning the years from 1848 to 2.00,was reconstructed by three MXD chronologies which were selected by stepwise *** reconstructed function was stable and explained 56.2. of the *** reconstructed results indicated a cold span of 153 years in spring and summer from the beginning of the 1950s to the beginning of the 1970s in the Yili *** strongly increasing tendency was detected in the mean maximum temperature anomaly from April to August during this reconstructed period.

关键词：平均最高气温伊犁谷地最大密度云杉胡杨生长季节新疆树木年轮宽度

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

A new cyamodontoid placodont from Triassic of Guizhou, china

引用

chinese Science Bulletin 2002年第5期47卷 403-407,442页

作者： LI Chun & O. RieppelInstitute of vertebrate paleontology and {2., chinese academy of sciences, beijing 10004., china The Field Museum, Chicago, II 60605-2.96, USA Institute of vertebrate paleontology and {2. Chinese Academy of Sciences Beijing China The Field Museum Chicago USA

A new cyamodontoid placodont is named (Pse-phochelys polyosteoderma gen. et. sp. nov.) and described based on a three-dimensionally preserved specimen. The material comes from the Wayao Member of the Falang Formation (Carnian, Late Triassic) in Guizhou Province, southwestern china. The skull of Psephochelys shows a unique combination of characteristics observed in Psepho-derma and Placochelys, and the carapace is diagnostic of a new taxon as well. The ventral dermal armor of Psephochelys differs from all other known cyamodontoids in that it comprises irregular marginal osteoderms in loose contact with each other, and gastralia between them. The cranial suture pattern is in part difficult to analyze due to apparent co-ossification of elements, or poor delimitation of sutures. This affects primarily the demarcation of the nasal from the prefrontal, and the relation between the anterior part of the parietal, posterior ends of the frontals, and postfrontals. However, the postfrontal appears to enter the

关键词： placodont Triassic Guizhou.

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

EARLY vertebrate FOSSILS FROM THE EARLY DEVONIAN OF ZHAOTONG DISTRICT, NORTHEASTERN YUNNAN

引用

古脊椎动物学报(中英文） 1996年第1期 11-17页

作者： Wang Junqing Fan Junhang Zhu Min (Institute of vertebrate paleontology and {2., chinese academy of sciences beijing 10004.)

Three early vertebrates (galeaspids Sanqiaspis zhaotongensis Liu 1975,Lungmenshanaspis yunnanensis sp. nov., and an undetermined osteolepid ), weredescribed from the Early Devonian of Bianqinggou, Zhaotong District,northeastern Yunnan. It is argued that the fish-bearing formation could be directly correlated with the Posongchong Formation in Guangnan and Wenshan,southeastern Yunnan, and might be named as the Posongchong Formation, rather than the "Cuifengshan Formation". The Posongchong Formation of Bianqinggou yields abundant remains of early vertebrates including galeaspids, antiarchs,petalichthyids and sarcopterygians. Four genera of galeaspids have been described from this formation, i.e., Sanqiaspis (Liu, 1975; this paper), Qingmenaspis (Pan & Wang, 1981), Zhaolongaspis (Wang & Zhu, 1994 ), Lungmenshanaspis.

关键词： Zhaotong Yunnan Early Devonian Early vertebrates Stratigraphy

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Statistical analyses of metric data of hominoid teeth found in Yuanmou of china

引用

chinese Science Bulletin 2000年第10期45卷 936-942页

作者： LIU Wu, ZHENG Liang & JIANG Chu1. Institute of vertebrate paleontology and {2., chinese academy of sciences, beijing 10004., china 2. Institute of Archaeology of Yunnan Province, Kunming 650118, china 3. Yuanmou Man Museum, Yuanmou 651300, china Institute of vertebrate paleontology and {2. Chinese Academy of Sciences Beijing China Institute of Archaeology of Yunnan Province Kunming China Yuanmou Man Museum Yuanmou China

Mesial-distal and buccal-lingual dimensions of 1 2.6 hominoid teeth found in Yuanmou of Yunnan Province during the period of 1986 and 1988 have been measured. The statistical analyses of the metric data show that the tooth sizes of Yuanmou hominoid can be divided into big and small two types, and most tooth dimensions display obvious bimodalities in both histograms and 2.dimensional plots. The coefficients of variance (CV) reveal that the CVs of Yuanmou hominoid tooth sizes are within or close to the CV ranges of Lufengpithecus and extant great apes. The comparisons of tooth sizes and their proportions indicate that Yuanmou hominoids have close affinities with Lefeng and Kaiyuan hominoids, and have obvious differences with Gorilla, Chimpanzee and Orangutan. The authors believe that the hominoid fossils found in Yuanmou in the past 10 years represent a single species with highly sexual dimorphism in morphology and this species may have a close evolutionary relationship with the hominoids found in

关键词： human origin Yuanmou hominoid dental metrics statistical analyses.

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

CENOZOIC MAMMAL AGES OF china

引用

古脊椎动物学报(中英文） 1995年第4期 307-314页

作者： Tong Yongsheng Zheng Shaohua Qiu Zhuding(Institute of vertebrate paleontology and {2.,the chinese academy of sciences, beijing 10004.)

Up to now about 1500 forms of mammals have been recognized in the Cenozoic deposits of different ages, ranging from Paleocene to Holocene. Studies of in taxonomy,phylogeny, biogeography, and other aspects regarding these mammals are carred on actively in this country. This contribution aims to briefly summarise and update the mammal ages for the chinese Cenozoic records.

关键词： china Cenozoic Mammals

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Growth characteristics and response to climate change of Larix Miller tree-ring in china

引用

Science china Earth sciences 2010年第6期53卷 871-879页

作者： SUN Yu1,4, WANG LiLi1,2.3, CHEN Jin5, DUAN JianPing1,4, SHAO XueMei1,2.& CHEN KeLong6 1 Institute of Geographic sciences and Natural Resources Research, chinese academy of sciences, {2. 100101, china 2.Institute of Tibetan Plateau Research, chinese academy of sciences, {2. 100085, china 3 Institute of Desert and Meteorology, china Meteorological Administration, Urumqi 830002. china 4 Graduate University of chinese academy of sciences, beijing 10004., china 5 Institute of {12. paleontology and paleoanthropology, chinese academy of sciences, beijing 10004., china 6 School of Life and Geography sciences, Qinghai Normal University, Xining 810008, china 1. Institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China4. Graduate University of Chinese Academy of Sciences Beijing 100049 China2. Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China3. Institute of Desert and Meteorology China Meteorological Administration Urumqi 830002 China5. Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China6. School of Life and Geography Sciences Qinghai Normal University Xining 810008 China

As one of the earliest species used in dendrochronological studies, Larix responds sensitively to climate change. In this study, nine larch species and one variety from eleven sites were collected to study the growth characteristics of tree-ring width using dendrochronological methods. Ten residual tree-ring chronologies were developed to analyze their relationships with regional standardized anomaly series by Pearson’s correlation analysis. The results suggest that most of the chronologies had significantly positive correlations with the mean temperature and mean maximum temperature in May. The spring temperature evidently limited the radial growth of the larch species without precipitation control. The largest mean tree-ring width was found in Himalayan Larch in Jilong, whereas Master Larch in Si’er reflected the smallest mean value. Both species presented little climate information in this study. chinese, Potanin, and Tibetan larches are significantly correlated with climate change, implying a huge potential for climate history reconstruction. The elevation of the sampling sites appears to be an important condition for tree-ring growth of larches responding to climate factors.

关键词： Larix Miller tree-ring climate change mean temperature in May

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

Dynamics of morphological changes for mitochondrial fission and fusion

引用

Science china(Physics,Mechanics & Astronomy) 2010年第4期53卷 680-689页

作者： WANG ShiQi 1,2.4 , FU ChangLiang 1,2., ZHANG Yan 1,2., CHEN Quan 3 & LONG Mian 1,2.1 Key Laboratory of Microgravity (National Microgravity Laboratory), beijing 100190, china 2.Center for Biomechanics and Bioengineering, Institute of Mechanics,{2., beijing 100190, china 3 State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology,{2., beijing 100101, china 4 Institute of vertebrate paleontology and paleoanthropology,{2.,{12., china 1. Key Laboratory of Microgravity (National Microgravity Laboratory) Beijing 100190 China2. Center for Biomechanics and Bioengineering Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China4. Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing 100044 China3. State Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China

Mitochondria experience continuous fusion and fission in a living cell, but their dynamics remains poorly quantified. Here a theoretical model was developed, upon a simplified population balance equation (PBE), to predict the morphological changes induced by mitochondrial fission and fusion. Assuming that both fission and fusion events are statistically independent, the survival probability of mitochondria staying in the fission or fusion state was formulated as an exponentially-decayed function with time, which depended on the time-dependent distribution of the mitochondrial volume and the fission and fusion rates. Parametric analysis was done for two typical volume distributions. One was Gamma distribution and the other was Gaussian distribution, derived from the measurements of volume distribution for individual mitochondria in a living cell and purified mitochondria in vitro. The predictions indicated that the survival probability strongly depended on morphological changes of individual mitochondria and was inversely correlated to the fission and fusion rates. This work provided a new insight into quantifying the mitochondrial dynamics via monitoring the evolution of the mitochondrial volume.

关键词： mitochondria morphology fission fusion dynamics modeling

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

SOME REMARKS ON CHENJIAWO FAUNA──On the First Appearance of Peking Man Fauna

引用

古脊椎动物学报(中英文） 1996年第1期 50-57页

作者： Xu Qinqi(Zhoukoudian International Paleoanthropological Research Centre, Institute of vertebrate paleontology and {2., chinese academy of sciences beijing 10004.)

The Chenjiawo fauna includes two stratigraphically distinct groups of mammalian fossils, 14 species of mammals and 4 stratigraphic horizons. They are L5, L6, S6 and L8-S9, representing a wide temporal distribution. The first appearance of Peking Man fauna can be correlated with Event 9 in America and Europe (Repenning, 1987) and is marked by the lowest stratigraphic occurrence of Cricetinus varians (LSD ). In northern Europe, Event 9 is believed to have taken place near the end of the Saale glaciation about 500 000 years ago (Bonifay, 1990). Therefore the geological age of the Chenjiawo fauna is between 500 000-1000 000 years B. P., corresponding to oxygen isotope. Stages 14-2.. Through the correlation between the solid earth, atmosphere,hydrosphere, and biosphere, the boundary between the Upper and Lower Lishi Formation should be moved to the S4/L5 boundary.

关键词： Chenjiawo fauna Peking Man Lishi Formation Astroclimatology

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A NEW PRIMITIVE CHALICOTHERE (PERISSODACTYLA,MAMMALIA) FROM THE EARLY EOCENE OF HUBEI, china

引用

古脊椎动物学报(中英文） 1995年第2期 150-159页

作者： Wang Yuan(Institute ol vertebrate Poleontology and paleoanthropology{2., beijing 10004.. china)

A new material of perissodactyl represented by a crushed skull and the same individual’s pair of mandibles (both lost their posterior parts) is described in this paper. The specimen was collected in 1992.by Dr. Wang Yuanqing of IVPP from the late Early Eocene of Danjiangkou, Hubei, china. This new material, Danjiangia pingi gen. et sp. nov., is here referred to Chalicotheribidea and recognized as the earliest known chalicothere. Several relevant issues, such as the early character evolution of chalicothere group, the possible close relationship between chalicothere and palaeothere group and the origin of chalicotheres, will also be tentatively discussed in the present paper.

关键词： Liguanqiao Basin Hubei Early Eocene Chalicothere

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

A new pterosaur (Pterodactyloidea, Tapejaridae) from the Early Cretaceous Jiufotang Formation of western Liaoning, china and its implications for biostratigraphy

引用

chinese Science Bulletin 2003年第1期48卷 16-23页

作者： WANG Xiaolin & ZHOU Zhonghe Institute of vertebrate paleontology and {2., chinese academy of sciences, beijing 10004., china Correspondence should be addressed to Wang Xiaolin (e-mail: xlinwang @***) Institute of vertebrate paleontology and {2. Chinese Academy of Sciences Beijing 100044 China

In this article we describe a new and excep-tionally well-preserved pterodactyloid pterosaur, Sinopterus dongi gen. et sp. nov. from the Jiufotang Formation in west-ern Liaoning Province of northeast china. The new species is referred to the family Tapejaridae, representing its first re-cord outside Brazil. It also represents the earliest occurrence as well as the most complete skeleton of the family. Some revisions are made about the family according to the mor-phological observations of the postcranial bones of Sinop-terus. Two pterosaur assemblages appear to have existed in the Jehol Group, represented by the lower Yixian Formation and upper Jiufotang Formation, respectively. The lower pterosaur assemblage shows some resemblance to that of the Late Jurassic in Solnhofen (Tithonian) by sharing members of the Pterodactylidae and Anurognathidae. The upper one shows more resemblance to that of the Early Cretaceous Santana Formation (Aptian/Albian) by comprising only pterodactyloids such as the Tapejaridae. The age of the Yixian Formation is younger than that of the Solnhofen lithographic limestone, and the age of the Jiufotang Forma-tion (Aptian) is slightly older than the Santana Formation.

关键词：辽西朝阳热河组生物地层白垩纪翼龙化石

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

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：