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29篇 您的检索式:作者名="JI WeiHong"
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1Wavelet Analysis and Nonparametric Test for Climate Change in Tarim River Basin of Xinjiang During 1959-2006显示文摘Using wavelet analysis,regression analysis and the Mann-Kendall test,this paper analyzed time-series(1959-2006) weather data from 23 meteorological stations in an attempt to characterize the climate change in the Tarim River Basin of Xinjiang Uygur Autonomous Region,China.Major findings are as follows:1) In the 48-year study period,average annual temperature,annual precipitation and average annual relative humidity all presented nonlinear trends.2) At the 16-year time scale,all three climate indices unanimously showed a rather flat before 1964 and a detectable pickup thereafter.At the 8-year time scale,an S-shaped nonlinear and uprising trend was revealed with slight fluctuations in the entire process for all three indices.Incidentally,they all showed similar pattern of a slight increase before 1980 and a noticeable up-swing afterwards.The 4-year time scale provided a highly fluctuating pattern of periodical oscillations and spiral increases.3) Average annual relative humidity presented a negative correlation with average annual temperature and a positive correlation with annual precipitation at each time scale,which revealed a close dynamic relationship among them at the confidence level of 0.001.4) The Mann-Kendall test at the 0.05 confidence level demonstrated that the climate warming trend,as represented by the rising average annual temperature,was remarkable,but the climate wetting trend,as indicated by the rising annual precipitation and average annual relative humidity,was not obvious.XU Jianhua CHEN Yaning LI Weihong JI Minhe DONG Shan HONG Yulian 2009Chinese Geographical Science2009,19,4:14
2甘南草原主要草食动物的食性及其生态位特征显示文摘家畜放牧系统中草食动物食性及其生态位特征的认识对草地管理有重要的现实指导意义。本文采用粪便和胃内容物显微组织分析法,分析了甘南草原4种主要草食动物牦牛(Bos mutus)、藏羊(Ovis aries)、喜马拉雅旱獭(Marmota himalayana)和高原鼢鼠(Eospalax baileyi)秋季的食性及食物生态位重叠程度。结果表明,4种动物的食物资源谱存有较大差异,禾草科的发草(Deschampsia caespitosa)和莎草科的扁穗草(Brylkinia compressus)是藏羊和牦牛食物结构的主体,而喜马拉雅旱獭的食谱中绝大部分是鹅绒委陵菜(Potentilla anserina)和克氏针茅(Stipa captillata),高原鼢鼠采食具有发达根茎的美丽风毛菊(Sausserua superba)、鹅绒委陵菜、蒲公英(Taraxacum mongolicum)及垂穗披碱草(Elymus nutans)。牦牛和藏羊的食物生态位宽度显著高于喜马拉雅旱獭和高原鼢鼠。食物生态位重叠度以藏羊和牦牛最高,其次为喜马拉雅旱獭和高原鼢鼠,重叠度最低的是藏羊和高原鼢鼠。甘南草原4种主要草食动物的食性及其生态位特征的分析可为优化当地草地管理策略提供重要依据。苏军虎 Weihong JI 徐长林 南志标 2017动物学杂志2017,52,3:12
3Evaluating the reliability of microsatellite genotyping from low-quality DNA templates with a polynomial distribution model显示文摘Molecular studies using trace DNA, such as from museum specimens, ancient or forensic samples and samples obtained noninvasively, often have a common problem of low quality of DNA templates. Amplification errors, such as allelic dropout and false allele, may arise during polymerase chain reaction (PCR) using such samples. A mathematical model which treats homozygotes and heterozygotes discriminately has been developed to measure sample quality and compute the confidence level of using multipletube approaches. We use plucked hair samples collected from 26 individual Sichuan snub-nosed monkeys (Rhinopithecus roxel- lana) to test the model. In this case, a confidence level of 99% can be achieved by three positive PCRs. If the sample quality is very poor and requires many PCR replicates, an alternative multiplestep genotyping method is recommended. This model enables researchers to optimize experimental protocols through pilot studies and obtain reliable genetic information using noninvasive sampling method.HE Gangi HUANG Kang GUO SongTao JI WeiHong QI XiaoGuang REN Yi JIN XueLin LI BaoGuo 2011Chinese Science Bulletin2011,56,24:8
4Antifatigue,Antioxidant and Immunoregulatory Effects of Peptides Hydrolyzed from Manchurian Walnut(Juglans mandshurica Maxim.) on Mice显示文摘The Manchurian walnut(Juglans mandshurica Maxim.) is rich in proteins, whereas this resource has not been used efficiently. The antifatigue, antioxidative and immunoregulatory effects of Manchurian walnut hydrolysate peptides(MWHPs)were evaluated in this study. MWHPs with a degree of hydrolysis of 32.23% were ultrafiltered and divided into three fractions,namely, high(> 10 k Da), medium(3–10 kDa), and low molecular weight(< 3 kDa), and then fed to mice continuously at doses of 200, 400 or 800 mg/(kg·d). The antifatigue, antioxidative, and immunoregulatory effects of the peptides were tested on the second and fourth weeks of MWHP administration. Results showed that low-molecular-weight MWHPs exerted significant antifatigue(prolonging swimming time, elevating liver glycogen contents, and reducing lactic acid contents), antioxidative(enhancing superoxide dismutase(SOD), GSH-Px, and catalase(CAT) activities and reducing malondialdehyde(MDA) content), and immunoregulatory(raising the immune-organ index and promoting T-lymphocyte proliferation and s Ig A secretion in the intestinal tract) effects. This research indicates that MWHPs have potential applications in health care and may be developed as a base for new functional foods.FANG Li REN Dayong CUI Lingyu LIU Chunlei WANG Ji LIU Wei MIN Weihong LIU Jingsheng 2018Grain & Oil Science and Technology2018,1,1:6
5Dominance rank of adult females and mating competition in Sichuan snub-nosed monkeys(Rhinopithecus roxellana)in the Qinling Mountains,China显示文摘Dominance hierarchy reflects resource competition in male primates as well as females.In this study,we collected data on the social rank and mating competition of female Sichuan snub-nosed monkeys from September 2009 to June 2010 in the Qinling Mountains,Shaanxi,China.Displacement was used to determine social hierarchy of the studied wild females.A total of 1223 displacement bouts between adult females and 316 mating behaviors within one-male units(OMUs) were recorded.Competitive displacement among females was very low(0.22 displacements per observation hour).The dominant ranks of females in target OMUs were determined by displacement,from one OMU to another:JB unit:YL > DBC > YCM >XBC > BD;JZT unit:XHW > JG > DT;PK unit:QQ > TM > HF;LP unit:SK > TH > WM.Higher-ranking females performed significantly more sexual behavior than lower-ranking females in this rare monkey.High-ranking females were more likely to win mating contests within those OMUs.Based on these studies,we assessed the social relationships among adult females and clarified possible explanations for the strategies of female mating competition in the OMUs.Furthermore,the notion that reproductive success may also be related to female dominance hierarchies in this polygynous species should be considered in future research.HE HaiXia ZHAO HaiTao QI XiaoGuang WANG XiaoWei GUO SongTao JI WeiHong WANG ChengLiang WEI Wei LI BaoGuo 2013Chinese Science Bulletin2013,58,17:5
6Female Reproductive Cycles of Phrynocephalus przewalskii (Lacertilia:Agamidae) in the Tengger Desert,China显示文摘The timing of reproduction can significantly affect an offspring's fitness, thereby also influencing the fitness of the parents, especially in species inhabiting extreme environments, such as deserts. Female reproductive cycles in Phrynocephalus przewalskii were studied from April to September 2008. Significant cycles of gonadal volume were found in all studied populations and the cycles were similar among the various populations. Females began vitellogenesis in April and contained oviductal eggs form May to June. Gonad volume decreased significantly in July and reached minimum volume from August to September. The follicular growth was negatively correlated with increasing precipitation and temperature in all populations. Hatching occurs during summer and early fall, when most of the annual rainfall occurs. Mean clutch size based on all populations was 2.7 ± 0.9 SE(n = 71).Wei ZHAO Nannan YU Yajuan WANG Weihong JI Naifa LIU 2011Asian Herpetological Research2011,2,1:3
7Geographic Variation in Clutch and Egg Size for the Lizard Phrynocephalus przewalskii(Squamata:Agamidae)显示文摘In order to tease apart proximate vs.ultimate sources of variation in reproductive strategy,studies have increasingly focused on populations rather than species as the unit of interest.The reproductive parameters of Phrynocephalus przewalskii(Agamidae)in different populations within the same phylogenetic clade were compared in this study.Female SVL,clutch size,egg volume and clutch volume varied significantly among populations.With increase in latitude,clutch size increased,while egg size decreased.Relatively fewer but larger eggs were produced with increasing of population density.Food availability had positive effects on clutch size,but no effect on egg size.Our result indicated that latitude,food availability and population density may be the proximate factors affecting the reproductive parameters of P.przewalskii.Yajuan WANG Weihong JI Wei ZHAO Nannan YU Naifa LIU 2011Asian Herpetological Research2011,2,2:2
8Synthesis and characterization of novel biocompatible nanocapsules encapsulated lily fragrance显示文摘Fragranced products are wildly used in our daily life. However, their storage, application and quality are severely influenced by their strong volatility. In order to overcome these natural defects of fragrances,fragrance encapsulation approaches have been developed recently. In this study, a mild, simple and lowcost method of fragrance encapsulation was invented. Liposomes composed of soya lecithin/DSPEPEG2000/PLGA were prepared to encapsulate lily fragrance(LF). And these nanosized fragrance products was named LF-NPs. The hydrodynamic diameters of LF-NPs were approximately 100 nm and their encapsulation efficiency was up to 21.9%. Besides, LF-NPs could also prolong the release time of lily fragrance. Finally, the cytotoxicity tests indicated that LF-NPs offered biocompatibility. Therefore, LF-NPs were expected to have application prospects.Weihong Ji Tianlu Zhang Zhiguo Lu Jie Shen Zuobing Xiao Xin Zhang 2019Chinese Chemical Letters2019,30,3:2
9Blue sheep in the Annapurna Conservation Area,Nepal:habitat use,population biomass and their contribution to the carrying capacity of snow leopards显示文摘The Himalaya region of Nepal provides a habitat for the endangered snow leopard(Panthera uncia)and its principal prey species,the blue sheep(Pseudois nayaur).The aim of this study was to describe the habitat,the distribution and the population structure of blue sheep,and to estimate their contribution to the carrying capac-ity of snow leopard in the upper Mustang region of Nepal.Blue sheep were recorded at altitudes from 3209-5498 m on slopes with gradients of 16-60°and aspects of 40°NE to 140°SE.A total of 939 blue sheep were counted in the upper Mustang region,and 98 were counted in the Yak Kharka region of Manang district;how-ever,upper Mustang had the lowest population density of blue sheep recorded within their distribution range in Nepal(0.86 blue sheep/km^(2)).The results of the study show that a higher density of blue sheep is associated with greater plant species diversity.The most important species present in the blue sheep habitat were Kobresia pyg-maea,Artemesia spp.,Lonicera spp.,Lancea tibetica,Poa spp.,Astragalus spp.and Ephedra gerardiana.It is estimated that the existing blue sheep population biomass of approximately 38925 kg in the upper Mustang re-gion could support approximately 19 snow leopards(1.6 snow leopards/100 km^(2)).Achyut ARYAL Dianne BRUNTON Weihong JI David RAUBENHEIMER 2014Integrative Zoology2014,9,1:2
10高原鼢鼠(Eospalax baileyi)头骨形态的地理分化显示文摘运用单因素方差分析、主成分分析、判别分析和聚类分析,对高原鼢鼠(Eospalax baileyi)4个地区(临潭、天祝、玛曲和碌曲)8个地理群体的头骨形态特征进行综合分析,比较13个特征变量的地理分异,挖掘形态特征的主要变量,并探讨其形态变异与环境的关系。结果发现,群体间13个特征变量均存在显著差异,主成分分析表明13个头骨特征变量可用3个主成分来表述,其累计贡献率达96.981%。颅全长、上齿列长及齿隙长是高原鼢鼠头骨发生分化的主要变量。天祝种群与碌曲种群,及玛曲种群与临潭种群都有重叠,其中碌曲的两个种群相似性最高,玛曲种群和临潭种群与其他种群几乎无重叠,显示完全分化,聚类分析结果与判别分析结果一致。头骨形态与地理因子的相关性分析发现头骨形态大小与海拔成显著的正相关关系。综合分析认为地理隔离、栖息地海拔因子影响下的生态条件等是高原鼢鼠头骨分化的主要因素。苏军虎 南志标 JI Weihong 王海芳 2018生态学报2018,38,1:2
11Global DNA hypomethylation, rather than reactive oxygen species (ROS), a potential facilitator of cadmium-stimulated K562 cell proliferation显示文摘Dejun Huang Yingmei Zhang Yongmei Qi Che Chen Weihong Ji 2008Toxicology Letters2008,,1:1
12Numeric simulation for structure' s damage identification of space truss 显示文摘Ji Weihong Song Yupu Liang Bing 2007Fron- tiers of Mechanical Engineering in China2007,2,4:1
13Comparison between forced-air and air-free warming on perioperative hypothermia in patients undergoing elective surgery显示文摘To the Editor:Hypothermia is described as a state in which the core temperature of a patient is decreased to equal to or<36,which is a common and severe complication among patients_undergoing elective sur-gery,.il Studies reported that hypothermia is associated withan increased riskof severaladverse events including postoperative shivering,surgical site infection,increased blood loss,and a longerlength of hospitalization.21Active warming for>30 min during the surgical procedure has been found to reduce the risk of perioperative hypothermia.Thus,more and more attention has been paid to how effectively prevent perioperative hypothermia,and many intraoperative active warming strategies have therefore been applied in,clinical practice,such as forced-air warming technology,_prewarming technology before anesthesia,resistive-polymer system,circulating water mattresses,and self-warming blanket.Bin Ji Mengxue He Hang Chen Yu Chen Siyuan Wang Lyucheng Yang Weihong Xu Nanping Shen 2022Chinese Medical Journal2022,135,19:1
14Soy ProteinAssisted Dispersion of Carbon Nanotubes in a Polymer Matrix显示文摘Ji Jianyin Brooks L Zhong Weihong 2012Materials Express2012,2,1:1
15Structural covariance network of the hippocampus–amygdala complex in medication-nale patients with first-episode major depressive disorder显示文摘Background The hippocampus and amygdala are densely interconnected structures that work together in multiple affective and cognitive processes that are important to the etiology of major depressive disorder(MDD).Each of these structures consists of several heterogeneous subfields.We aim to explore the topologic properties of the volume-based intrinsic network within the hippocampus–amygdala complex in medication-nale patients with first-episode MDD.Methods High-resolution T1-weighted magnetic resonance imaging scans were acquired from 123 first-episode,medication-nale,and noncomorbid MDD patients and 81 age-,sex-,and education level-matched healthy control participants(HCs).The structural covariance network(SCN)was constructed for each group using the volumes of the hippocampal subfields and amygdala subregions;the weights of the edges were defined by the partial correlation coefficients between each pair of subfields/subregions,controlled for age,sex,education level,and intracranial volume.The global and nodal graphmetrics were calculated and compared between groups.Results Compared with HCs,the SCN within the hippocampus–amygdala complex in patients with MDD showed a shortened mean characteristic path length,reduced modularity,and reduced small-worldness index.At the nodal level,the left hippocampal tail showed increased measures of centrality,segregation,and integration,while nodes in the left amygdala showed decreased measures of centrality,segregation,and integration in patients with MDD compared with HCs.Conclusion Our results provide the first evidence of atypical topologic characteristics within the hippocampus–amygdala complex in patients with MDD using structure network analysis.It provides more delineate mechanism of those two structures that underlying neuropathologic process in MDD.Lianqing Zhang Xinyue Hu Yongbo Hu Mengyue Tang Hui Qiu Ziyu Zhu Yingxue Gao Hailong Li Weihong Kuang Weidong Ji 2022Psychoradiology2022,2,4:1
16Vegetation dynamics and its response to driving factors in typical karst regions,Guizhou Province,China显示文摘Analyzing the vegetation dynamics and its response to driving factors provides a vital reference for understanding regional ecological processes and ecosystem services.However,this issue has been poorly understood in karst areas.Taking Guizhou Province as a case study,based on the Normalized-Difference Vegetation Index of the Global Inventory Modeling and Mapping Studies and on meteorological data sets during 1982-2015,we evaluated vegetation dynamics and its response to climatic factors and human activities.We used several methods:the Mann-Kendall test,rescaled range analysis,partial correlation analysis,and residual analysis.The results are as follows:1)the mean annual Normalized-Difference Vegetation Index was 0.46 and exhibited a significant increasing trend with a variation rate of 0.01/10a during 1982-2015 in Guizhou Province.The vegetation cover showed was spatially heterogeneous:High vegetation cover was distributed mainly in the center and western margin of the study area,while the other parts of the study area mainly distributed with low vegetation cover,although the vegetation cover was higher in the nonkarst areas than in the karst areas;2)in general,the climate was getting warmer and drier in Guizhou Province during 1982-2015.Vegetation cover was positively correlated with temperature and negatively correlated with precipitation.Compared to precipitation,temperature was the dominant climatic factor impacting vegetation dynamics;3)'large-scale ecological restoration projects have obviously increased vegetation cover in Guizhou Province in recent years.The contribution of human activities to vegetation changes was 76%,while the contribution of climatic factors was 24%.In summary,compared to natural forces such as climatic factors and geographic parameters,human activities were the main factor driving the vegetation dynamics in Guizhou Province.Xiaocha WEI Qiuwen ZHOU Ya LUO Mingyong CAI Xu ZHOU Weihong YAN Dawei PENG Ji ZHANG 2021Frontiers of Earth Science2021,15,1:1
17Increased expression of transgene in stably transformed cells of Dunaliella salina by matrix attachment regions显示文摘Tianyun Wang Lexun Xue Weihong Hou Baosheng Yang Yurong Chai Xiang Ji Yafeng Wang 2007Applied Microbiology and Biotechnology2007,,3:1
18Delivery systems for theranostics in neurodegenerative diseases显示文摘Yan Li Ruiyuan Liu Weihong Ji Yanhui Li Linying Liu Xin Zhang 2018Nano Research2018,11,10:1
19Soy protein-assisted dispersion of carbon nanotubes in a polymer matrix显示文摘Ji Jianyin Brooks L Zhong Weihong 2012Materials Express2012,2,1:1
20Mesoporous silica nanospheres with the ability of photo-driven releasing sandela 803 for the application to wallpaper显示文摘Fragrances are widely used in our daily life and have made great contributions to creating a clean and fresh healthy air environment. However, the rapid volatilization severely influences their storage,application and quality. Therefore, it is necessary and urgent to develop approaches to controllably release the odorants as demanded. In this study, photo-driven mesoporous silica nanospheres loaded with sandela 803 was designed, prepared and named as S803@MS-S. S803@MS-S possessed ordered mesoporous, large specific surface area and pore volume. After adsorption of sandela 803, the S803@MSS was added into wallpaper to prepare fragrant wallpaper S803@MS-S-W. And this wallpaper exhibited excellent sustained and controlled release performances stimulated by light.Weihong Ji Tianlu Zhang Zhiguo Lu Jie Shen Jing Hu Yunwei Niu Zuobing Xiao Xin Zhang 2019Chinese Chemical Letters2019,30,3:1
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