检索结果-南通市图书馆

An assessment of population structure and regeneration status of magnolia punduana Hk. f. & Th.(magnoliaceae) in fragmented forests of northeast India

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2020年第3期31卷 937-943页

作者： Viheno Iralu Ngakhainii Trune Pao Krishna Upadhaya Department of Environmental Studies School of Human and Environmental SciencesNorth-Eastern Hill UniversityShillong 793022India Department of Basic Sciences and Social Sciences School of TechnologyNorth-Eastern Hill UniversityShillong 793022India

The population structure and regeneration status of magnolia punduana Hk. f. & Th., an endemic tree species of northeast India were investigated in fragmented forests in the Jarain Hills and in adjoining areas of Meghalaya state. The population structure was discontinuous in all the fragments with the absence of individuals in higher diameter classes. The number of individuals increased with the size of the fragment patches(p 105 ha). The number of seedlings and saplings were also higher in the larger fragments. Human-related disturbances had a negative impact on the species population(p<0.002). Variation in the population density in different forest patches has been attributed to fragment size, site characteristics and ongoing human disturbances. The restricted distribution of the species coupled withexploitation and habitat destruction underlines the need for its conservation.

关键词： Conservation Disturbance Fragmentation magnolia punduana Restricted distribution

Cavitation resistance of peduncle,petiole and stem is correlated with bordered pit dimensions in magnolia grandiflora

在线全文

学校读者我要写书评

暂无评论

Plant Diversity 2021年第4期43卷 324-330页

作者： Feng-Ping Zhang Jiao-Lin Zhang Timothy J.Brodribb Hong Hu CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303YunnanChina College of Traditional Chinese Medicine Yunnan Key Laboratory of Dai and Yi MedicinesYunnan University of Chinese MedicineKunming650500YunnanChina Key Laboratory of Economic Plants and Biotechnology Kunming Institute of BotanyChinese Academy of SciencesYunnan Key Laboratory for Wild Plant ResourcesKunming 650201YunnanChina School of Natural Sciences University of TasmaniaPrivate Bag 55HobartTasmania 7001Australia

Variation in resistance of xylem to embolism among flowers,leaves,and stems strongly influences the survival and reproduction of ***,little is known about the vulnerability to xylem embolism under drought stress and their relationships to the anatomical traits of pits among reproductive and vegetative *** this study,we investigated the variation in xylem vulnerability to embolism in peduncles,petioles,and stems in a woody plant,magnolia *** analyzed the relationships between water potentials that induced 50%embolism(P50)in peduncles,petioles,and stems and the conduit pit traits hypothesized to influence cavitation *** found that peduncles were more vulnerable to cavitation than petioles and stems,supporting the hypothesis of hydraulic vulnerability segmentation that leaves and stems are prioritized over flowers during drought ***,P50 was significantly correlated with variation in the dimensions of inter-vessel pit apertures among peduncles,petioles and *** findings highlight that measuring xylem vulnerability to embolism in reproductive organs is essential for understanding the effect of drought on plant reproductive success and mortality under drought stress.

关键词： Drought Flower Pit traits Xylem embolism magnolia

Effects and mechanism of total phenols of magnolia officinalis combined with Maijunan Tablets on blood pressure of spontaneous hypertensive rats

在线全文

学校读者我要写书评

暂无评论

Chinese Herbal Medicines 2019年第2期11卷 177-184页

作者： Ming-li Zhu Wei Wang Feng Qin Yong Chen Key Laboratory of Biotechnology of Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology Hubei University

Objective: Maijunan(MJA) Tablets is a protected variety of traditional Chinese medicine(TCM) consisted of Pueraria lobata, hydrochlorothiazide(HTCZ), Uncaria rhynchophylla(366:1:980) and excipient. In the present work, MJA was consisted of the total flavones of P. lobata, HCTZ and total alkaloids of U. rhynchophylla(40:11:75). The combination of MJA and the total phenols of magnolia officinalis(M-MJA) was consisted of the total flavones of P. lobata, the total phenols of M. officinalis, HCTZ and the total alkaloids of U. rhynchophylla(40:40:11:75). The aim of this work was to examine the effect and mechanism of M-MJA on the blood pressure of spontaneous hypertensive rats(SHRs).Methods: Adult male SHRs were randomly divided into control group, MJA group(180 mg/kg·d), and the M-MJA group(218 mg/kg·d)(n = 5). SHRs were orally administered with M-MJA and MJA respectively once a day for 8 weeks, the blood pressure of SHRs was measured every two weeks, and the biochemical indicators related to blood pressures were detected at the last ***: After oral administration of M-MJA to SHRs once a day for 8 weeks, the systolic and diastolic blood pressures of SHRs were deceased significantly. M-MJA affected renin-angiotensin-aldosterone system by decreasing the levels of Ren, Ang II and ALD, affected the endothelial function by decreasing the levels of ET-1 and 20-HETE, and increasing the level of eNOS, affected the oxidative stress by increasing the protein expression of Nrf2 and the activities of HO-1 and GSH-Px, and decreasing the protein expression of CYP2 E1 and CYP4 A, as well as the content of ***: These results indicated that M-MJA could regulate the renin-angiotensin-aldosterone system,improve endothelial function, and inhibit CYP4 A activity to reduce the production of 20-HETE, alleviate the oxidative stress disorder of the visceral organs, and eventually exert antihypertensive effect. Additionally, the anti-oxidant ability, regulating the renin-ang

关键词： endothelial function Maijunan Tablets oxidative stress renin-angiotensin-aldosterone system spontaneously hypertensive rats total phenols of magnolia officinalis

Condoleezza Rice:A Steel magnolia

在线全文

学校读者我要写书评

暂无评论

英语自学 2005年第6期 14-16页

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

magnolia推出高速VCSEL链路

半导体信息 2004年第6期 35-35页

作者：陈裕权

magnolia Optical Technologies公司开发出他们认为是当今第一个120Gb/s的光纤发射机与接收机组件。该组件有12个并联信道,每一信道的工作速度为10Gb/s。发射机采用850nm的垂直腔面发射激光器(VCSEL)源,而接收机单元采用一个PIN二极管... 详细信息

magnolia Optical Technologies公司开发出他们认为是当今第一个120Gb/s的光纤发射机与接收机组件。该组件有12个并联信道,每一信道的工作速度为10Gb/s。发射机采用850nm的垂直腔面发射激光器(VCSEL)源,而接收机单元采用一个PIN二极管阵列。这项技术由美陆军坦克与机动车指挥部资助,它最初将用在作战系统中。

关键词： VCSEL magnolia 作战系统组件设计二极管阵列工作速度关键技术难点联合攻击战斗机高速局域网寄生电容

Thirty Cases of Acute Lumbar Sprain Treated by Acupuncture Combined with Point-Injection at Tianzhu

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

Journal of Traditional Chinese Medicine 2003年第3期23卷 203-204页

作者：周珊玲刘明元陈正秋 Acupuncture Department Jiangxi Provincial Hospital of Traditional Chinese MedicineNanchang 330006Jiangxi Province Jiangxi Hospital of Combined Traditional and Western Medicine Nanchang 330006Jiangxi Province

In recent years, the authors have treated 30 cases of acute lumbar sprain by acupuncture combined with point medicinal injection at Tianzhu (BL 10), and obtained quite good therapeutic results, as is reported in the f... 详细信息

关键词： Acupuncture Therapy Phytotherapy Acupuncture Points Adolescent Adult Combined Modality Therapy Drugs, Chinese Herbal Female Humans Injections Low Back Pain magnolia Male Middle Aged Sprains and Strains

在线全文

学校读者我要写书评

暂无评论

贵州种子植物新记录(Ⅵ)