检索结果-南通市图书馆

A Taxonomic Investigation of Variation Within Cissus quadrangularis L.(vitaceae) In Kenya

Wuhan University Journal of Natural Sciences 2001年第3期6卷 715-724页

作者： Gituru Wahiti Robert, Wang Qing feng , Wang Yong, Guo You hao College of Life Sciences, Wuhan University, Wuhan 430072, China College of Life Sciences Wuhan University Wuhan China

Using information from literature as well as records of localities on herbarium specimen labels at the East African Herbarium Nairobi (EA), materials ofCissus quadrangularis L.,C. cactiformis Gilg. andC. quinquangularis Chiov. were collected and new localities were sought. On the basis of the nature of their stem angles, the specimens ofC. quadrangularis were sorted into two variants, A and B. Variant A has smooth stem angles while variant B has rough stem angles. The authors have proposed that variant B should be recognized as a new variety withinC. quadrangularis. Variant A is the type variety ofC. quadrangularis. A map showing the distribution of the two variants in Kenya has been prepared. The rough-edged variant was found to be absent from the low-lying semi-arid regions of northern Kenya. The variants were found occurring in distinct, separate populations but without separate geographical patterns. The results of t-test show no significant difference (p=0.05) between the means of measurements of dimensions of various organs in the two variants. The stem angles of specimens of the two variants were studied under scanning electron microscope (SEM). This showed a clear morphological difference between the two variants. The results of the investigation support the hypothesis that the variation withinC. quadrangularis represents distinct kinds that can be recognized as taxa at infra-specific level.

关键词： Key words Cissus quadrangularis L vitaceae infra specific variation

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

Resveratrol Tetramers from the Roots of Ampelopsis sinica

引用

Chinese Chemical Letters 2001年第10期12卷 893-896页

作者： Na LI Xin LIU Mao LIN Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical College1 Xian Nong Tan StreetBeijing 100050

A new resveratrol tetramer, sinicin A was isolated from the roots of Ampelopsis sinica, with four known tetramers: vitisin A, cis-vitisin B, ampelopsin H and hopeaphenol. The structure and stereochemistry of sinicin A... 详细信息

关键词： Ampelopsis sinica vitaceae resveratrol tetramer

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 Oligostilbene from the Roots of Vitis Amurensis

引用

Chinese Chemical Letters 1999年第9期10卷 775-776页

作者： Kai Sheng HUANG Mao LIN Lin Nine YU Man KONG(Institute of Materia Mad ica. Chinese Academy of Medical Sciencesand Peking Union Medical College. Beijing 10000) Institute of Materia Medica Chinese Academy of Medical Sciences Peking Union Medical College Beijing 100050 China

A new resveratrol trimer. amurensin G (1), was isolated from the roots of Vitis amurensis Rupr. Its structure and relative configuration were established on the basis of spectral evidence. especially on HMBC spectrum ... 详细信息

关键词： Vitis amurensis vitaceae oligostilbene amurensin G resveratrol

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 Simple Clear Technique in Observing Vascular Development of Grape Ovary

引用

Phyton-International Journal of Experimental Botany 2023年第7期92卷 2117-2132页

作者： Teng Fei Youmei Li Bo Li Zhaosen Xie College of Horticulture and Garden Yangzhou UniversityYangzhou225009China Shandong Academy of Grape Shandong Academy of Agricultural SciencesJinan250199China

The vascular system of the grapevine(Vitis vinifera L.)flower is a channel for transporting water and nutrients to the *** plays an important role in the development of the ovary and fertilization through ***,the vascular bundles in the flower are so tiny that they are difficult to sample and observe by traditional slicing *** this study,‘Summer Black’grape flowers were selected as the test materials,and the tissue samples were treated by the optical clearing *** simple compaction,the structure and development of the vasculature were observed by common microscopy,fluorescence microscopy and laser confocal *** results showed that the transparency effects of 3%NaOH and a saturated trichloroacetaldehyde composite agreed well with the observations of the vascular structure and the developmental process of the flower in different ***,the samples after optical clearing could be reconstructed in 3D,which helped us know more about its development and *** to these observations,the vasculature of the‘Summer Black’flower can be divided into ovule vascular bundles,peripheral vascular bundles and central vascular *** peripheral vascular bundles were composed of the first-order vascular bundles and the inferior vascular bundles which branched from the superior vascular *** bundles branched in different directions with no discernible *** two different branching methods were as ***,the inferior vascular bundle was directly connected to a superior vascular ***,some of the superior vascular bundles bent in different ways,forming the inferior vascular bundle connecting the superior vascular bundles by a metamorphosed vessel with a triangular *** a comparison of the developmental changes in various periods,the growth of vascular bundles at each period was directly proportional to the growth of the *** confocal scanning was used to explore the t

关键词： vitaceae microscopy xylem

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

Chemical Constituents from Ethanoic Extracts of the Aerial Parts of Leea aequata L.,a Traditional Folk Medicine of Myanmar

引用

Natural Products and Bioprospecting 2019年第3期9卷 243-249页

作者： Nay Lin Tun Dong-Bao Hu Meng-Yuan Xia Dong-Dong Zhang Jun Yang Thaung Naing Oo Yue-Hu Wang Xue-Fei Yang Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar Key Laboratory of Economic Plants and Biotechnology and the Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China College of Resources and Environment Yuxi Normal UniversityYuxi 653100People’s Republic of China Forest Research Institute YezinNay Pyi Taw 05282Myanmar

We aimed at reporting the chemical constituents and antimicrobial activities of Leea aequata L.,a traditional folk medicine used in Myanmar for the treatment of wounds and skin diseases.A new neolignan,(7S,8R)-9′-O-acetylcedrusin(1),a new lactam,(3S,4S)-4-chloro-3-hydroxypiperidin-2-one(2),along with 21 known compounds,including fve lignans(3-7),four favonoid glycosides(8-11),and others(12-23),were isolated from the ethanoic extract of the aerial parts of *** structures of the new compounds were determined by NMR,MS,and ECD *** all the antimicrobial tests of the 23 compounds,only 3,4,5-trihydroxybenzoic acid ethyl ester(17)showed weak inhibitory activities against Escherichia coli and Salmonella enterica ***.

关键词： Leea aequata vitaceae Traditional medicines Lignans Flavonoids

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

Pharmacognostic evaluation of Cayratia trifolia (Linn.)leaf

引用

Asian Pacific Journal of Tropical Biomedicine 2012年第1期2卷 6-10页

作者： Dinesh Kumar Jyoti Gupta Sunil Kumar Renu Arya Tarun Kumar Ankit Gupta Division of Pharmacognsoy&Phytochemistry Institute of Pharmaceutical SciencesKurukshetra University Guru Gobind Singh College of Pharmacy Yamunanagar

Objective:To present a detailed pharmacognostic study of the leaf of Cayratia trifolia(***)Linn.(vitaceae),an important plant in the Indian system of ***:The macroscopy,microscopy,physiochemical analysis,preliminary testing,fluorescence analysis of powder of the plant and other WHO recommended methods for standardization were ***:Leaves are trifoliolated with petioles(2-3 cm)*** are ovate to oblong-ovate,(2-8 cm)long,(1.5-5 cm)wide,pointed at the *** leaf surface shows the anisocytic type stomata covered with guard cells followed by epidermis *** surface contents including *** islet and vein termination were also *** section of leaf shows the epidermis layer followed by cuticle layer and vascular bandies(xylem and phloem).The mesophyll is differentiated into palisade and spongy *** covering trichomes emerge from the upper *** are uniseriate and *** of collenchyma are present below and upper layer of ***:It can be concluded that the pharmacognostic profile of the *** is helpful in developing standards for quality,purity and sample identification.

关键词： Cayratia trifolia Leaf Microscopic Pharmacognostic vitaceae Physiochemical analysis Preliminary testing

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

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

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：