检索结果-南通市图书馆

Spatial-Temporal Pattern and Driving Forces of Land Use Changes in Xiamen

Pedosphere 2006年第4期16卷 477-488页

作者： QUAN Bin CHEN Jian-Fei QIU Hong-Lie M. J. M. ROMKENS YANG Xiao-Qi JIANG Shi-Feng LI Bi-Cheng Research Center of Soil and Water Conservation and Ecological Environment Chinese Academy of Sciences and Ministry of Education Northwest Sci-tech University of Agriculture and Forestry Yangling Shaanxi 712100 （China）. school of Geographical sciences Guangzhou University Guangzhou 510405 Department of Geography and Urban Analysis California State University Los Angeles 90032-8253 （USA） USDA/ARS National Sedimentation Laboratory P.O. Box 1157 Oxford MS 38655 （USA） school of sciences Jimei University Xiamen 361021 （China）

Using Landsat TM data of 1988, 1998 and 2001, the dynamic process of the spatial-temporal characteristics of land use changes during 13 years from 1988 to 2001 in the special economic zone of Xiamen, China was analyzed to improve understanding and to find the driving forces of land use change so that sustainable land utilization could be practiced. During the 13 years cropland decreased remarkably by nearly 11304.95 ha. The areas of rural-urban construction and water body increased by 10 152.24.ha and 84..94.ha, respectively. From 1988 to 2001, 52.5% of the lost cropland was converted into rural-urban industrial land. Rapid urbanization contributed to a great change in the rate of cropland land use during these years. Land-reclamation also contributed to a decrease in water body area as well as marine ecological and environmental destruction. In the study area 1) urbanization and industrialization, 2) infrastructure and agricultural intensification, 3) increased affluence of the farming community, and 4. policy factors have driven the land use changes. Possible sustainable land use measures included construction of a land management system, land planning, development of potential land resources, new technology applications, and marine ecological and environmental protection.

关键词： driving force GIS land use change remote sensing Xiamen

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

Identification, characteristic and phylogenetic analysis of type II DNA topoisomerase gene in Giardia lamblia

引用

Cell Research 2005年第6期15卷 474-482页

作者： De HE1, 2, 3, Jian Fan WEN1,*, Wan Qun CHEN1, Si Qi LU4. De Dong XIN1, 21 Key Laboratory of Cellular and Molecular Evolution, Kunming Institute of Zoology, Chinese Academy of sciences, Kunming 650223, China2 Gradulate school of the Chinese Academy of sciences, Beijing 100039, China3 Southwest forestry College, Kunming 650224. China4.Capital {4. of Medical sciences, Beijing 100054. China KeyLaboratoryofCellularandMolecularEvolution KunmingInstituteofZoologyChineseAcademyofSciencesKunming650223China

The genes encoding type II DNA topoisomerases were investigated in Giardia lamblia genome, and a type IIA gene,GlTop 2 was identified. It is a single copy gene with a 4.76 bp long ORF without intron. The deduced amino acidsequence shows strong homology to eukaryotic DNA Top 2. However, some distortions were found, such as sixinsertions in the ATPase domain and the central domain, a ~100 aa longer central domain; a ~200 aa shorter C-terminaldomain containing rich charged residues. These features revealed by comparing with Top 2 of the host, human, mightbe helpful in exploiting drug selectivity for antigiardial therapy. Phylogenetic analysis of eukaryotic enzymes showedthat kinetoplastids, plants, fungi, and animals were monophyletic groups, and the animal and fungi lineages shared amore recent common ancestor than either did with the plant lineage; microsporidia grouped with fungi. However, unlikemany previous phylogenetic analyses, the “amitochondriate” G. lamblia was not the earliest branch but diverged aftermitochondriate kinetoplastids in our trees. Both the finding of typical eukaryotic type IIA topoisomerase and the phylo-genetic analysis suggest G. lamblia is not possibly as primitive as was regarded before and might diverge after theacquisition of mitochondria. This is consistent with the recent discovery of mitochondrial remnant organelles in G. lamblia.

关键词： evolutionary position GlTop2 gene Giardia lamblia identification phylogenetic analysis type II DNAtopoisomerase.

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

Phosphoproteomic identification and phylogenetic analysis of ribosomal P-proteins in Populus dormant terminal buds

Phosphoproteomic identification and phylogenetic analysis of...

引用

第二届中国林业学术大会——S2 功能基因组时代的林木遗传与改良

作者： Chang-Cai Liu1)a Tian-Cong Lu 1)a Hua-Hua Li3) Gui-Feng Liu5) Bai-Chen Wang8)b (Education Ministry Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Northeast forestry university Harbin 15004.)Hong-Xia Wang4. (Institute of Basic Medical sciences, National Center for Biomedical Analysis Beijing 100850) Ling Ma6) (forestry {4., Northeast forestry university Harbin 15004.) Chuan-Ping Yang7)b (Education Ministry Key Laboratory of Forest Tree Genetic Improvement and Biotechnology, Northeast forestry university Harbin 15004. forestry {4., Northeast forestry university Harbin 15004.)

To better understand the role that reversible phosphorylation plays in woody plant ribosomal P-protein function, we initiated a phosphoproteomic investigation of P-proteins from Populus dormant terminal buds. Using gel-free (in-solution) protein digestion and phosphopeptide enrichment combined with a nanoUPLC-ESI-MS/MS strategy, we identified six phosphorylation sites on eight P-proteins from Populus dormant terminal buds. Among these, six Ser sites and one Thr site were identified in the highly conserved C-terminal region of eight P-proteins of various P-protein subfamilies, including two P0, two P1, three P2, and one P3 protein. Among these, the Thr site was shown to be novel and has not been identified in any other organisms. Sequence analysis indicated that the phosphothreonine sites identified in the C-terminus of Ptr RPP2A exclusively occurred in woody species of Populus etc. The identified phosphopeptides shared a common phosphorylation motif of (S/T)XX(D/E) and may be phosphorylated in vivo by casein kinase 2 as suggested by using Scansite analysis. Furthermore, phylogenetic analysis suggested that divergence of P2 also occurred in Populus, including Type I and Type II. To the best of our knowledge, this is the first systematic phosphoproteomic and phylogenetic analysis of P-proteins in woody plants, the results of which will provide a wealth of resources for future understanding and unraveling of the regulatory mechanisms of Populus P-protein phosphorylation during the maintenance of dormancy.

关键词： Dormant terminal buds NanoUPLC-ESI-MS/MS Phosphoproteomics Phylogenetic analysis P-proteins

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

Characteristics of echolocating bats’auditory stereocilia length, compared with other mammals

引用

Science China(Life sciences) 2007年第4期50卷 492-496页

作者： YAO Qian1,6, ZENG JinYao2, ZHENG YongMei3, Julia LATHAM4. LIANG Bing1, JIANG Lei3 & ZHANG ShuYi51 Institute of Zoology, Chinese Academy of sciences, Beijing 100080, China 2 College of wildlife Resources, Northeast forestry university, Harbin 15004., China 3 Institute of Chemistry, Chinese Academy of sciences, Beijing 100080, China 4.Zoological Society of London, Institute of Zoology, London, NW1 4.Y, England 5 school of Life Science, East China Normal university, Shanghai 200062, China 6 Graduate university of Chinese Academy of sciences, Beijing 10004., China These authors contributed equally to this work 1. Institute of Zoology Chinese Academy of Sciences Beijing 100080 China 6. Graduate university of Chinese Academy of sciences Beijing 100049 China 2. College of wildlife Resources Northeast Forestry University Harbin 150040 China 3. Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China 4. Zoological Society of London Institute of Zoology London NW1 4RY England 5. school of Life Science East China Normal University Shanghai 200062 China

The stereocilia of the Organ of Corti in 4.different echolocating bats, Myotis adversus, Murina leuco-gaster, Nyctalus plancyi (Nyctalus velutinus), and Rhinolophus ferrumequinum were observed by using scanning electron microscopy (SEM). Stereocilia lengths were estimated for comparison with those of non-echolocating mammals. The specialized lengths of outer hair cells (OHC) stereocilia in echolocating bats were shorter than those of non-echolocating mammals. The specialized lengths of inner hair cells (IHC) stereocilia were longer than those of outer hair cells stereocilia in the Organ of Corti of echolocating bats. These characteristics of the auditory stereocilia length of echolocating bats represent the fine architecture of the electromotility process, helping to adapt to high frequency sound and echolocation.

关键词： echolocating bats cochlea stereocilia scanning electron microscopy (SEM)

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 floral organ moving like a caterpillar for pollinating

引用

Journal of Systematics and Evolution 2010年第2期48卷 102-108页

作者： 1,3,4.hong-Jian LIU 1Li-Jun CHEN 1,2,3Ke-Wei LIU 1Li-Qiang LI 1Wen-Hui RAO 1(The National Orchid Conservation Center of China/The Orchid Conservation & Research Center of Shenzhen,Shenzhen 518114.China) 2(school of Life sciences,university of Science & Technology of China,Hefei 230027,China) 3(The Center for Biotechnology and BioMedicine,Graduate school at Shenzhen,Tsinghua university,Shenzhen 518055,China) 4.College of forestry,South China Agricultural university,Guangzhou 51064.,China) (The National Orchid Conservation Center of China/The Orchid Conservation & Research Center of Shenzhen Shenzhen 518114 China) (school of Life sciences University of Science & Technology of China Hefei 230027 China) (The Center for Biotechnology and BioMedicine Graduate School at Shenzhen Tsinghua University Shenzhen 518055 China) (College of forestry South China Agricultural University Guangzhou 510642 China) *Correspondence: Zhong-Jian LIU *Correspondence: *?Author for correspondence. E-mail: <liuzj@***>.

A new pollination mechanism is reported of an orchid species,Bulbophyllum penicillium,based on a field observation in Southeast Yunnan of *** species has a sensitive lip,and there is a distance of 2-3 mm between it and column *** the lip is touched by a landing insect,it will move up and down or swing left and right continuously,just like a moving *** suck a lip movement,the pollinator,a very small fruit fly (Drosophila sp.) ca.1 mm in height,will be pressed toward the column apex where anther and stigma are located,and then cross-pollination takes *** unique mode of pollination,depending on the movement of lip rather than insect itself,has never been found before in either Orchidaceae or other families of angiosperms.

关键词： pollination mechanism Bulbophyllum penicillium Drosophila lip movement

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

Studies on Neural Network Modeling for Air Conditioning System by Using Data Mining with Association Analysis

Studies on Neural Network Modeling for Air Conditioning Syst...

引用

2010 4.h International Conference on Intelligent Information Technology Application (IITA2010)

作者： Zheng Wang school of Technology, Beijing forestry university, Beijing, China Ning Han school of Technology, Beijing forestry university, Beijing, China Yang Wang Beijing Master Systems Engineering Co.,Ltd Beijing, China

VAV air conditioning system involves multiple control parameters and they have strong coupling with each other, which caused the modeling complex. A neural network model of air handling unit （AHU） is constructed through data preprocessing and association analysis as mean of data mining is made to identity interesting information between the supply air temperature and the other variables acquired by air conditioning system. The study provides new idea and technical support for AHU modeling of VAV air conditioning system.

关键词： VAV air conditioning system data mining association analysis neural network modeling

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

forestry Development and Environmental Protection in China Since 1980

引用

Forest Ecosystems 2003年第S1期5卷 1-4页

作者： Liu Junchang~* Song Weiming school of Economics and Management,Beijing forestry university,Beijing 100083,P.R.China

Forest,as the main body of the terrestrial ecological system and the important natural resource on which themankind relies for subsistence,not only can provide timber and other forest products,but also has the function of adjusting climate,conserving water and soil,wind-breaking and fixing sand,*** plays an irreplaceable role in maintaining the natural *** 1978,the opening and reform policy has been carried out in China,the Chinese economy has been developingvery *** the same time,Chinese government has given priority to tree planting and forestry development which are seen assignificant contributions to the development of the ecological *** upsurge of tree planting and forest protecting hasbeen set off one after another by organizing and mobilizing the people all over *** work has been done to developforestry and to improve the landscape of the *** this paper,the development of forestry in the last 20 years has been reviewedand major forestry policies have been *** on the development of national economy and forestry situation,the 4.majorstrategic measures have been pointed out for the development of forestry in the future.

关键词： forestry development ecological system forestry industry system forestry policy

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

云南屏边猕猴桃病害周年调查及防治模型构建

引用

北方园艺 2021年第11期 26-36页

作者：何华汪燕潘慧陈凯武汉生物工程学院园林园艺学院华南农业大学园艺学院华中农业大学园艺林学学院湖北工业大学生物工程与食品学院

以云南屏边县7个代表性猕猴桃园区周年调查所获得的病害样本为试材,通过采集大量病害样本,结合分离纯化、生物学特征、分子生物学鉴定及反接验证结果对病原菌进行分析,研究了7个园区四季发生的病害种类和分布,并提出针对性的防治措施,... 详细信息

以云南屏边县7个代表性猕猴桃园区周年调查所获得的病害样本为试材,通过采集大量病害样本,结合分离纯化、生物学特征、分子生物学鉴定及反接验证结果对病原菌进行分析,研究了7个园区四季发生的病害种类和分布,并提出针对性的防治措施,以此构建了屏边猕猴桃园区的病害防治模型,以期为屏边县猕猴桃病害的综合防治提供参考依据,促进猕猴桃产业的发展。结果表明:屏边县猕猴桃主要病害为细菌性溃疡病、真菌性黑斑病、褐斑病、叶斑病、炭疽病、果实软腐病;1、3、5号园区的春季和4.园区的春夏出现细菌性溃疡病;3号园区发生间座壳菌和拟盘多毛孢属2种软腐病;秋冬季软腐病为最主要病害,1、2、3、4.园区均有发生;7号园区有黑孢菌属引起的叶斑病发生。可参考该防治模型进行综合防治才能显著改善该地区猕猴桃病害。

关键词：猕猴桃病害溃疡病软腐病防治模型构建

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

边坡条件对重力式挡墙地震位移模式的影响

引用

振动．测试与诊断 2017年第4期37卷 763-768页

作者：文畅平江学良杨慧孙广臣中南林业科技大学现代木结构工程材制造及应用技术湖南省工程实验室长沙410018 中南林业科技大学土木工程学院长沙410018

基于大型振动台模型试验,研究边坡条件对重力式挡墙地震位移模式及其变化方式的影响。振动台模型试验采用2个比尺1∶8的基覆边坡和顺层边坡模型,支挡结构为重力式挡墙与格构式锚杆框架二级组合式结构,地震波选用大瑞人工波和Kobe波。研... 详细信息

基于大型振动台模型试验,研究边坡条件对重力式挡墙地震位移模式及其变化方式的影响。振动台模型试验采用2个比尺1∶8的基覆边坡和顺层边坡模型,支挡结构为重力式挡墙与格构式锚杆框架二级组合式结构,地震波选用大瑞人工波和Kobe波。研究表明,基覆边坡中重力式挡墙地震位移模式主要有4.,即绕墙趾向边坡外侧转动、以滑动为主的向边坡外侧滑动与绕墙趾向边坡外侧转动的耦合、以转动为主的绕墙趾向边坡外侧转动与向边坡外侧滑动的耦合以及以滑动为主的向边坡外侧滑动与绕墙踵向边坡方向转动的耦合。顺层边坡中重力式挡墙地震位移模式主要有2类:绕墙趾向边坡外侧转动,绕墙趾向边坡外侧转动与离开边坡土体向外侧滑动的耦合。当地震烈度大于VII度时,重力式挡墙才产生动位移模式。边坡条件、地震波类型及烈度对重力式挡墙地震位移模式及其变化方式的影响较大,对相对位移的影响较小。

关键词：重力式挡墙边坡条件地震位移模式大型振动台模型试验地震永久位移

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

Agarwood formation is the outcome of a structural and metabolites defense against wounding in Aquilaria sinensis

Agarwood formation is the outcome of a structural and metabo...

引用

中药与天然药高峰论坛暨第十二届全国中药和天然药物学术研讨会

作者： Xingli Zhang~(1,2,3),Chun Sui~1,Zheng Zhang~1,Jianhe Wei~1,Hongjiang Chen~(1,4., Yun Yang~(1,4.,Yanhong Xu~1 and Yujun Liu~2 1 Institute of Medicinal Plant Development,Chinese Academy of Medical sciences & Peking Union Medical College,Beijing 100193,China 2 College of Biological Science and Biotechnology,Beijing forestry university,Beijing 100083,China 3 school of Food & Biological Engineering,Shandong Polytechnic university,Jinan,250353,China 4.Hainan Branch Institute of Medicinal Plant Development,Chinese Academy of Medical sciences & Peking Union Medical College,Wanning, 571533,China

Lignum Aquilariae Resinatum(agarwood)is a solid-state condensate with mixed with resin and lignin that forms in Aquilaria and Gvrinops trees of the family *** is very expensive for its rare reserve and diverse functions as material of incense,aroma oil,medicine and ornamental *** to rapidly achieve large quantity of high-grade agarwood and underlying formation mechanism has aroused a lot of interests of researchers and industrialists. Aquilaria sinensis(Lour.)Gilg is the agarwood-producing plant species in China. Stem-partial-breaking method is usually used to artificially induce agarwood formation in Chinese A. sinensis *** we investigated changes on stem structure and volatile composition of stem-partial-breaking treated six-year old trees in continuous layers below wounding sites during agarwood formation. Typical wound inducible occlusions,tyloses and gels,were found in the vessels and fiber-tracheids in the initial stage of agarwood *** distribution extended to with increasing the treatment *** was observed that starch grains were exclusively located in the living parenchyma *** were found transporting from the parenchyma cells into surrounding tissues,neighboring fiber-tracheids and vessels,through the pits and a similar wax(oils) secreting way. Obvious four distinct layers including decomposed layer,agarwood layer,transition layer,and white-timber layer were observed below the wound surface days after *** typical agarwood chemical components were detected on days after *** chemicals assayed, previous notable wound inducible chemicals in other plant species were detected in different zones at different time points after wounded. From structure and chemical component aspects,our results support the hypothesis which we previously proposed that agarwood formation in *** was the result of defense response. Considering the feature of agarwood formation and its economic value un

关键词：

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

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：