检索结果-南通市图书馆

Vital roles for ethnobotany in conservation and sustainable development

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2020年第6期42卷 399-400页

作者： Shengji Pei Hamilton Alan Yuhua Wang Kunming Institute of Botany Chinese Academy of Sciences132 Lanhei RoadKunming650201YunnanChina Formerly Plant Conservation Officer WWF-InternationalAnd Plant Conservation and Livelihoods OfficerPlantlife InternationalChina

The scientific discipline of ethnobotany-the study of human interactions with plants e has applications in many fields of current global concern,including food security,climate change,biodiversity conservation and human *** studies can provide insights into the ways that societies interact locally with their environmental *** studies have the potential to bring together and integrate local and scientific knowledge to advance the cause of achieving biocultural conservation(Gaoue et al.,2017;Prance,2007).This Special Issue of Plant Diversity contains recent ethnobotanical studies that aim to contribute to determining the most useful ways ethnobotany can be used to confront human problems in the ***,this issue shows ways in which ethnobotany can contribute to the conservation of biodiversity,especially with regards to documentation and maintenance of indigenous and local knowledge of *** research in this issue also describes innovative practices communities have adopted to maintain their plant resources。

关键词： maintain conservation integrate

Partial Synthesis of Crassicauline A from Yunaconitine

在线全文

学校读者我要写书评

暂无评论

Natural Products and Bioprospecting 2020年第2期10卷 105-108页

作者： Rong-Ping Zhang Yan-Jun Lin Hao-Fei Yu Si-Ying Chen Jun Zhou Yunnan University of Chinese Medicine KunmingChina Kunming Medical University KunmingChina Kunming Institute of Botany Chinese Academy of SciencesKunmingChina

Both Aconitum hemsleyanum and Aconitum geniculatun have abundant contents of yunaconitine(1).Yunaconitine(1)has similar skeleton to crassicauline A(3);the only difference between them is that 1 contains aα-hydroxyl group at *** team attempts to convert 1 into 3 because 3 owns pharmacological *** are two steps to achieve the transformation above:firstly,use dehydration reaction to transform yunaconitine(1)into dehydroyunaconitine(2);secondly,use hydrogen reduction to acquire crassicauline A(3).Compared with other methods,this one below is more suitable for production application and more concise;moreover,the cost is lower with higher yield.

关键词： Diterpenoid alkaloids Yunaconitine Crassicauline A

Thermal deformation behavior and mechanism of intermetallic alloy Ti2AlNb

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

Transactions of Nonferrous Metals Society of China 2016年第3期26卷 722-728页

作者：张钦差陈明和王辉王宁欧阳金栋李新孝南京航空航天大学机电工程学院南京210016 江西洪都航空工业有限公司南昌330024 西安航空发动机(集团)有限公司西安710021

The deformation behavior and mechanism of Ti2AlNb-based alloy were experimentally investigated at elevated temperatures. Firstly, the stress?strain relationships at different temperatures and strain rates were investigated via uniaxial tensile testing. Then, formability data, as determined by examining the deep drawing and bending abilities, were obtained through limiting draw ratio (LDR) and bending tests. Finally, metallographic experiments and fracture morphology investigations were conducted to examine the thermal deformation mechanism of the alloy. The results showed that as the temperature increased, the total elongation increased from 13.58% to 97.82% and the yield strength decreased from 788 to 80 MPa over the temperature range from 750 to 950 °C at a strain rate 0.001 s?1. When the temperature reached 950 °C, the strain rate was found to have a great influence on the deformation properties. The plastic formability of the sheet metal was significantly improved and a microstructuraltransformation of O toB2 andα2 occurred in this temperature region, revealing the deformation mechanism of its plasticity.

关键词： Ti2AlNb-based alloy deformation behavior deformation mechanism formability

Fossils of Quercus sect. Heterobalanus can help explain the uplift of the Himalayas

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2007年第2期52卷 238-247页

作者： ZHOU ZheKun YANG QingSong XIA Ke Laboratory of Biogeography and Biodiversity Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Using data from previous research on Quercus sect. Heterobalanus, the coexistence approach to Xix-abangma and Namling fossil sets, and altitudinal ranges of vegetation presented by fossil floras, a re-view and reevaluation have been made of existing theories on the uplift of the Himalayas, especially the palaeoaltitudes of Xixabangma and Namling in Tibet. The Xixabangma fossil set has a palaeoaltitude range of 2500―3500 m, and has risen 2200―3400 m since the Pliocene. The lower and upper assem-blages of the Miocene Namling had palaeoaltitudes of 2500―3000 m and 2800―3000 m, respectively. Therefore, Namling has risen at least 1300 m since the Miocene, thereby challenging some existing theories that suggest Namling has been static since the Miocene.

关键词：化石古生物学喜马拉雅山新生界

High regional genetic differentiation of an endangered relict plant Craigia yunnanensis and implications for its conservation

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2016年第5期38卷 221-226页

作者： Jing Yang Zerui Gao Weibang Sun Changqin Zhang Key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of Sciences Yunnan Tobacco Industrial Hi-tech Material CO. LTD Kunming Botanical Garden Kunming Institute of BotanyChinese Academy of Sciences

Of the genus Craigia,widespread in the Tertiary,only two relict species survived to modern *** species is now possibly extinct and the other one,Craigia yunnanensis,is severely *** surveys have located six *** populations in Yunnan province,southwest *** fluorescent amplified fragment length polymorphism(AFLP),the genetic diversity and population structure of these populations were *** was found that genetic diversity of *** was moderate at the species level,but low at regional and population *** of population structure showed significant genetic differentiation between Wenshan and Dehong regions,apparently representing two geographically isolated for long time *** are also clear indications of isolation between populations,which,together with anthropogenically caused decline of population size,will lead to general loss of the species genetic variation with subsequent loss of adaptive *** conserve the genetic integrity of ***,we recommend that ex-situ conservation should include representative samples from every population of the two differentiated regions(*** and Dehong).The crosses between individuals originated from different regions should be avoided because of a high risk of outbreeding *** all the extant populations of *** are in unprotected areas with strong anthropogenic impact,there is no alternative to reintroduction of *** into suitable protected locations.

关键词： Craigia yunnanensis Isolation AFLP Genetic diversity Population genetic structure Conservation genetics

在线全文

学校读者我要写书评

暂无评论

鳞毛蕨科四个属的染色体数目(英文)

植物分类学报 2006年第5期44卷 516-522页

作者：卢金梅李德铢吴丁中国科学院昆明植物研究所生物多样性与生物地理学重点实验室

报道了鳞毛蕨科的4个属(毛枝蕨属Leptorumohra、石盖蕨属Lithostegia、黔蕨属Phanerophlebiopsis和柳叶蕨属Cyrtogonellum)6种植物的染色体数目及生殖方式。其中柳叶蕨Cyrtogonellum fraxinellum ‘n’=123, 2n=123; 离脉柳叶蕨C. caducum ‘n’=123; 斜基柳叶蕨C. inaequalis 2n=123; 四回毛枝蕨Leptorumohra quadripinnata n=41; 石盖蕨Lithostegia foeniculacea 2n=164; 长叶黔蕨Phanerophlebiopsis neopodophylla 2n=82。石盖蕨属、黔蕨属和柳叶蕨属的染色体数目为首次报道。结果表明这3个属的染色体基数和鳞毛蕨科中其他属一样均为x=41。细胞学证据支持将石盖蕨属、黔蕨属置于鳞毛蕨科的处理。本文还发现柳叶蕨属与贯众属Cyrtomium的一些种一样, 具有无融合生殖方式, 而其他3个属仅具有在蕨类植物中较为常见的有性生殖方式。

关键词：鳞毛蕨科柳叶蕨属毛枝蕨属石盖蕨属黔蕨属染色体数目无融合生殖

Untiring Researches for Alternative Resources of Rhizoma Paridis

在线全文

学校读者我要写书评

暂无评论

Natural Products and Bioprospecting 2018年第4期8卷 265-278页

作者： Xu-Jie Qin Wei Ni Chang-Xiang Chen Hai-Yang Liu State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of Sciencesand Yunnan Key Laboratory of Medicinal ChemistryKunming 650201People’s Republic of China

Rhizoma Paridis(RP,M®),a traditional Chinese medicine,is the rhizoma of Paris polyphylla ***(PPY)or *** *** which are widely used as important raw materials for several Chinese patent ***,the wild resources of these herbs have become less and less due to their slow-growing characteristics and previously excessive *** review covers untiring investigations on alternative resources of RP by our research group over the past decades,including non-medicinal parts of PPY as well as other plants of Liliaceae and Liliflorae *** arial parts of PPY and the whole plants of Trillium kamtschaticum might be alternative resources for RP based on the fact that they shared the same or similar saponins and bioactivities.

关键词： Rhizoma Paridis Paris polyphylla Alternative resources Steroidal saponins Bioactivities

Analyzing the Effectiveness of Policy Implementation at the Local Level: A Case Study of Management of the 2009–2010 Drought in Yunnan Province, China

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

International Journal of Disaster Risk Science 2017年第1期8卷 64-77页

作者： Neera Shrestha Pradhan Yufang Su Yao Fu Liyun Zhang Yongping Yang University of Chinese Academy of Sciences Beijing 100049China International Centre for Integrated Mountain Development(ICIMOD) KathmanduNepal Kunming Institute of Botany(kib) Chinese Academy of SciencesKunming 650201YunnanChina Centre for Mountain Ecosystem Studies Kunming Institute of BotanyKunming 650201YunnanChina Yunnan Academy of Social Science Kunming 650034YunnanChina Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650091YunnanChina

Several research efforts have focused primarily on policy implementation and improving innovative actions to address disaster risks. Discussions are ongoing on how to measure the effectiveness of policy implementation at the local level. But there is no definitive theory of effective policy implementation, and very few frameworks have been found acceptable as the basis of an analysis of the effectiveness of policy implementation, especially on droughts. Based on the 2009–2010 extreme drought in Yunnan, China, this article presents a modified framework to assess the effectiveness of policy implementation by defining policy, practice, and performance, as well as a feedback loop by which to share the lessons learned. Water conservancy projects in Luliang County and the agricultural diversity program in Longyang County in Yunnan Province were analyzed from a farmers' perspective. It was found that farmers are highly dependent on government policies and projects, and the effectiveness of policies is measured by short-term, immediate, and tangible benefits rather than long-term adaptation strategies. The results highlight the urgent need to reduce risks by developing better awareness about climate change and drought and its impacts, increased understanding of drought hazards, and implementation of appropriate measures for long-term adaptation.

关键词： China Community perception Drought impact Local adaptation strategies Policy implementation and effectiveness Yunnan Province

Hydroxylation of nigranoic acid to 6β-hydroxynigranoic acid by Caryospora carllicarpa YMF1.01026

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2007年第2期18卷 165-167页

作者： Jin Yan Dong Ye Gao Chen Hong Chuan Song Yan Ping He Lei Li Yong Ping Zhong Yan Hui Zhu Jie Cao Luo Wang Ke Qin Zhang Laboratory for Conservation and Utilization of Bioresources Yunnan UniversityKunming 650091China Department of Chemistry Yunnan Normal UniversityKunming 650092China Provincial Key Lab of Rural Energy Engineering Yunnan Normal UniversityKunming 650092China

Microbial transformation of nigranoic acid by Caryospora carllicarpa YMF1.01026 afforded the new derivative 6β-hydroxynigranoic acid. Its structure was elucidated by spectroscopic methods.

关键词： Nigranoic acid 6β-Hydroxynigranoic acid Microbial transformation