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Thermal Characterization and Decomposition Kinetics of Free Anthraquinones from Rhubarb

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Chinese Chemical Letters 2006年第5期17卷 699-702页

作者： Li ming zhang xia LI Yu Jie DAI College of Bioengineering Tianjin University of Science ＆ Technology Tianjin 300222

The thermal behaviour of aloe-emodin, chrysophanol and physcion and their kinetics have been investigated under non-isothermal conditions by means of differential thermal analysis （DTA） and thermogravimetry （TG）. The thermal characteristics have been determined using the DTA and TG-DTG curves. The non-isothermal kinetic data were analyzed by means of the Achar method and the Madhusudanan-Krishnan-Ninan （MKN） method. The possible reaction mechanisms have been investigated by comparing the kinetic parameters. The kinetic equation for aloe-emodin, chrysophanol and physcion can be expressed as dα/dt=Aexp（-E/RT）1/3（1-α）[-In（1-α]2. The activation energy E （kJ mol^-1） of the three free anthraquinones are 78.09, 89.54, and 107.5 and their InA/s^-1 are 22.98, 36.85 and 43.60, respectively.

关键词： Aloe-emodin chrysophanol physcion thermogravimetry (TG) differential thermoanalysis (DTA) non-isothermal kinetics.

A displacement sensor of dual-light based on FPGA

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Optoelectronics Letters 2007年第4期3卷 294-298页

作者： HE ming-xia zhang Wei-na zhang Xu StateKeyLaboratoryofprecisionMeasurementTechnology and Instruments Tianjin UniversityTianjin300072China

The dual-light displacement sensor is presented to obtain a higher accuracy compared with the single. The structure and principle of the system are also introduced, and the hardware and software are brought in too. Th... 详细信息

关键词：位移传感器对偶光 FPGA 数据处理

Complete mitochondrial genome of the leaf muntjac(Muntiacus putaoensis) and phylogenetics of the genus Muntiacus

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Zoological Research 2017年第5期38卷 310-316页

作者： Guo-Gang Li ming-xia zhang Kyaw Swa Kyaw-Win Maung Rui-Chang Quan Southeast Asia Biodiversity Research Institute Chinese Academy of Sciences Yezin Nay Pyi Taw 05282 Myanmar Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Mengla Yunnan 666303China Hponkan Razi Wildlife Sanctuary Offices Putao Kachin 01051 Myanmar Forest Research Institute Forest Department Ministry of Environmental Conservation and Forestry Yezin Nay Pyi Taw 05282 Myanmar

The leaf muntjac （Muntiacus putaoensis） is an endemic deer species found in the east trans- Himalayan region. In recent years, population numbers have decreased due to heavy hunting and habitat loss, and little genetic data exists for this species, thus our knowledge of distribution rangs and population sizes likewise remain limited. We obtained mtDNA genes and the complete mitochondrial genome sequence of M. putaoensis using PCR, followed by direct sequencing. The complete mitogenome sequence was determined as a circular 16 349 bp mitochondrial genome, containing 13 protein-coding genes, two rRNA genes 22 tRNA genes, and one control region, the gene composition and order of which were similar to most other vertebrates so far reported. Most mitochondrial genes, except for ND6 and eight tRNAs, were encoded on the heavy strand. The overall base composition of the heavy strand was 33.1% A, 29.3% T, 24.2% C, and 13.4% G, with a strong AT bias of 62.4%. There were seven regions of gene overlap totaling 95 bp and 11 intergenic spacer regions totaling 74 bp. Phylogenetic analyses （ML and BI） among the Muntiacus genus based on the sequenced of mitogenome and ND4L-ND4 supported M. putaoensis as a member of Muntiacus, most closely related to M. vuquangensis. However, when analyses based on cyt b included two more muntjacs, M. truongsonensis was most closely related to M. putaoensis rather than M. vuquangensis, and together with M. rooseveltorum, likely forming a M. rooseveltorum complex of the species. This study will help in the exploration of the evolutionary history and taxonomic status of the leaf muntjac, as well as its protection as a genetic resource.

关键词： Muntiacus Muntiacus putaoensis Mitogenome Phylogenetics

The breeding biology of Red-Whiskered Bulbul(Pycnonotus jocosus) in Xishuangbanna, southwest China

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Zoological Research 2015年第4期36卷 233-240页

作者： Huan LI ming-xia zhang xiao-Jun YANG Liang-Wei CUI Rui-Chang QUAN The Faculty of Forestry Southwest Forestry University Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences The Faculty of Ecotourism Southwest Forestry University

To fill the gap in breeding biology information about the Red-Whiskered Bulbul （Pycnonotus jocosus）, in 2013, we studied the breeding biology of this species in Xishuangbanna, southwest China. The breeding began from February and continued until early August. The breeding strategy of P. jocosus was more flexible and their nests were only built in cultivated landscapes, whereas, no nest building in native tropical rain forest was found. Small open cup nests were built on 50 different plant species, and at heights ranging from 2.1±0.6 m above the ground （n=102）. The mean clutch size was 2.53±0.51 eggs （n=40） and the mean egg mass was 2.81±0.25 g （n=60）. The average incubation period was 11.1±0.5 days （n=14）, and the average nestling period was 11.0±0.8 days （n=31）. The overall nest success was 34.22%.The hatching and fledging showed either asynchrony or synchrony. Invertebrate food decreased with nestling age, whereas, plant food increased with nestling age. Moreover, distinct parental roles of the parents in nestling period were found. Compared with other passerine species, P. jocosus spent less time in incubating （58%）. The clutch size, incubation and nestling period of the P. jocosus in southwest China were different from those of the R jocosus in India.

关键词： Red-Whiskered Bulbul Breeding biology Incubation Nestling Parental roles

Bird diversity in northern Myanmar and conservation implications

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Zoological Research 2017年第5期38卷 264-280页

作者： ming-xia zhang Myint Kyaw Guo-Gang Li Jiang-Bo Zhao xiang-Le Zeng Kyaw Swa Rui-Chang Quan Southeast Asia Biodiversity Research Institute Chinese Academy of Sciences Yezin Nay Pyi Taw 05282 Myanmar Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences Mengla Yunnan 666303China Hponkan Razi Wildlife Sanctuary Offices Putao Kachin 01051 Myanmar Science Communication and Training Department Xishuangbanna Tropical Botanical Garden Chinese Academy of Sciences MenglaYunnan 666303 China Yingjiang Bird Watching Society Yingjiang Yunnan 679300 China

We conducted four bird biodiversity surveys in the Putao area of northern Myanmar from 2015 to 2017. Combined with anecdotal information collected between 2012 and 2015, we recorded 319 bird species, including two species （Arborophila mandellii and Lanius sphenocercus） previously unrecorded in Myanmar. Bulbuls （Pycnonotidae）, babblers Timaliidae） pigeons and doves （Columbidae）, and ）heasants and partridges （Phasianidae） were the most abundant groups of birds recorded. Species richness below 1 500 m a.s.l, was higher than species richness at higher elevations. Our results suggest that the current protected areas in this region should be expanded to lower elevations to cover critical conservation gaps.

关键词： Birds Hponkan Razi Hkakabo Razi Surveys Conservation Myanmar

Contributions to the flora of Myanmar from 2000 to 2019

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Plant Diversity 2020年第4期42卷 292-301页

作者： Bin Yang Min Deng ming-xia zhang Aung Zaw Moe Hong-Bo Ding Mya Bhone Maw Pyae Pyae Win Richard TCorlett Yun-Hong Tan Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw05282Myanmar Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunMenglaYunnan666303PR China Center of Conservation Biology Core Botanical GardensChinese Academy of SciencesMenglunMenglaYunnan666303PR China School of Ecology and Environmental Science Yunnan UniversityKunmingYunnan650091PR China Forest Research Institute Forest DepartmentMinistry of Environmental Conservation and ForestryYezinNay Pyi Taw05282Myanmar

Myanmar is botanically rich and floristically diverse:one of the world's biodiversity ***,Myanmar is still very unevenly explored,and until a plant checklist was published in 2003,relatively little work was done on its *** checklist included 11,800 species of spermatophytes in 273 *** this checklist was published,the botanical exploration of Myanmar has accelerated and there have been many additional *** therefore surveyed the literature of taxonomic contributions to Myanmar’s vascular flora over the last 20 years(2000e2019)and compiled a list of new and newly described *** list includes 13 genera,193 species,7 subspecies,19 varieties,and 2 forms new to science;and 3 families,34 genera,347 species,4 subspecies,7 varieties,and 1 form newly recorded in ***,they represent 91 families and 320 *** of the new discoveries belong to 15 families,with more than 25%(146 taxa)belonging to *** new discoveries are unevenly distributed in the country,with about 41%of the newly discovered species described from Kachin State in northeast *** reflects the incompleteness of our current knowledge of the flora of Myanmar and the urgent need for a greatly expanded *** completion of the flora of Myanmar requires more fieldwork from north to south,taxonomic studies on new and existing collections,and some mechanism that both coordinates the efforts of various international institutions and initiatives and encourages continued international *** addition,producing modern taxonomic treatments of the flora of Myanmar requires the participation of experts on all vascular plant families and *** is also an urgent need to attract young scientists to plant taxonomy,to work on inventories,identification,nomenclature,herbarium work,and comparative studies.

关键词： Flora New species Taxonomy Plant diversity Specimens

Photoluminescence of ZnO Nanorods Grown by Hydrothermal Method on Si Substrate

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Wuhan University Journal of Natural Sciences 2009年第5期14卷 415-418页

作者： HU ming,zhang xia,MENG xianquan School of Physics and Technology,Wuhan University,Wuhan 430072,Hubei,China School of Physics and Technology Wuhan University Wuhan China

ZnO nanorods were grown on Si substrate by hydrothermal method under various reaction time （12, 24, and 36 h）, Zn^2＋ concentrations （0.01, 0.02, and 0.05 mol/L） and reaction temperatures （70-95 ~C）. Their photoluminescence （PL） tests were taken at room temperature. Nanorods grown under longer reaction times or higher temperatures can emit stronger UV light and depressed green light, suggesting better crystallization of ZnO nanorods. Higher Zn^2＋ concentration results in stronger green band emitting, whereas the UV peak is depressed with the Zn^2＋ concentration over 0.02 mol/L. This indicates that excessive interstitial Zn defects may be introduced into the nanorods in Zn-rich environment.

关键词： ZnO nanorods hydrothermal method photoluminescence

Recent advances in liver-directed gene transfer vectors

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Hepatobiliary & Pancreatic Diseases International 2004年第3期3卷 332-336页

作者： Dong xia, ming-Man zhang and Lu-Nan Yan Department of General Surgery, West China Hospi-tal, Sichuan University, Chengdu 610041 , China Department of General Surgery West China Hospital Sichuan University Chengdu 610041 China.

BACKGROUND: Gene therapy as part of modern molecu-lar medicine holds great promise for the treatment of hepa-tocellular carcinoma (HCC) and has the potential to bringa revolutionary era to cancer treatment. For the past de-cade various viral and non-viral vectors have been engi-neered for improved liver gene *** RESOURCES: An English-language literature searchusing MEDLINE (2004), Index Medicus (2004) and biblio-graphic reviews of books and review articles. Liver-directedgene transfer vectors and their history and recent ***: The ultimate goal of liver-directed gene therapyfor HCC is the stable expression of a therapeutic transgenein a significant proportion of hepatocytes. The design of avector system providing efficient and stable gene engraft-ment and expression in human hepatocytes is still a chal-lenging issue. The advantages and disadvantages of the ge-netically engineered vector of viral or non-viral origin arediscussed with respect to their essential ***: Liver gene therapy has a long way to goand efficient and innocuous liver-directed gene transfer vec-tors are therefore urgently required.

关键词： hepatocellular carcinoma gene therapy vector

Subretinal fibrosis secondary to neovascular age-related macular degeneration:mechanisms and potential therapeutic targets

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Neural Regeneration Research 2025年第2期20卷 378-393页

作者： Jingxiang zhang xia Sheng Quanju Ding Yujun Wang Jiwei Zhao Jingfa zhang Department of Ophthalmology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Urology People’s Hospital of Huangdao DistrictQingdaoShandong ProvinceChina Department of Ophthalmology Shanghai General Hospital(Shanghai First People’s Hospital)Shanghai Jiao Tong University School of MedicineShanghaiChina National Clinical Research Center for Eye Diseases Shanghai Key Laboratory of Ocular Fundus DiseasesShanghai Engineering Center for Visual Science and PhotomedicineShanghai Engineering Center for Precise Diagnosis and Treatment of Eye DiseasesShanghaiChina

Subretinal fibrosis is the end-stage sequelae of neovascular age-related macular *** causes local damage to photoreceptors,retinal pigment epithelium,and choroidal vessels,which leads to permanent central vision loss of patients with neovascular age-related macular *** pathogenesis of subretinal fibrosis is complex,and the underlying mechanisms are largely ***,there are no effective treatment options.A thorough understanding of the pathogenesis of subretinal fibrosis and its related mechanisms is important to elucidate its complications and explore potential *** current article reviews several aspects of subretinal fibrosis,including the current understanding on the relationship between neovascular age-related macular degeneration and subretinal fibrosis;multimodal imaging techniques for subretinal fibrosis;animal models for studying subretinal fibrosis;cellular and non-cellular constituents of subretinal fibrosis;pathophysiological mechanisms involved in subretinal fibrosis,such as aging,infiltration of macrophages,different sources of mesenchymal transition to myofibroblast,and activation of complement system and immune cells;and several key molecules and signaling pathways participating in the pathogenesis of subretinal fibrosis,such as vascular endothelial growth factor,connective tissue growth factor,fibroblast growth factor 2,platelet-derived growth factor and platelet-derived growth factor receptor-β,transforming growth factor-βsignaling pathway,Wnt signaling pathway,and the axis of heat shock protein 70-Toll-like receptors 2/*** review will improve the understanding of the pathogenesis of subretinal fibrosis,allow the discovery of molecular targets,and explore potential treatments for the management of subretinal fibrosis.

关键词： choroidal neovascularization epithelial-mesenchymal transition mesenchymal transition myofibroblast neovascular age-related macular degeneration submacular fibrosis subretinal fibrosis therapeutic targets transforming growth factor-β vascular endothelial growth factor