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59篇 您的检索式:作者名="Chunwang"
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1Impacts of grassland fence on the behavior and habitat area of the critically endangered Przewalski's gazelle around the Qinghai Lake显示文摘The trend of fencing grassland as livestock paddocks is spreading on the Eurasian steppe,however,its impacts on grassland wildlife are little known.In order to explore such impacts,we carried out a field study on how grassland fencing impacts Przewalski's gazelle(Procapra przewalskii),a species listed as EN(Endangered) by SSC/IUCN,on the Qinghai-Tibet Plateau.The results revealed that(1) in the fenced areas,daily movement distance of Przewalski's gazelle was 5081±1187 m(Hudong-Ketu) and 4110±912 m(Yuanzhe),which was much shorter than the 7223±546 m recorded in an unfenced area(Kuaierma);(2) the feeding bout duration of Przewalski's gazelle was much shorter in the fenced habitat;(3) the frequency of walking along both high or low fence lines reached about 81%;while the frequency of jumping across the low fence line was only about 1.2% and frequency of crawling through the bottom of the high fence lines was about 17.8%;(4) the size of post-fencing habitat decreased to about 20% and 6% of the sizes of pre-fencing habitat in Hudong-Ketu and Yuanzhe areas respectively,but no clear change in the size of habitat area was found in the unfenced Kuaierma area;and(5) the fence lines impaired the possibility of gazelles to escape from predators and occasionally trapped the Przewalski's gazelle which failed to jump over the fence lines.Death occurrence of Przewalski's gazelle in the intensively fenced area,including gazelles strangled by fence lines and predated by wolves,reached 5% of the population size in Yuanzhe and up to 15%-20% in Hudong-Ketu.This study highlights the negative impacts of grassland fencing on Przewalski's gazelle and proposes measures for integrating conservation of this gazelle with livestock management practice.YOU ZhangQiang JIANG ZhiGang LI ChunWang MALLON David 2013Chinese Science Bulletin2013,58,17:11
2温带草原退化后土壤微生物群落结构和功能的变化显示文摘草原退化是草原生产力维持面临的一个重大挑战,这一过程显著影响着草原生态系统的能量流动和土壤养分变化过程,进而直接或间接地影响着土壤微生物。我们的研究目的首先是调查不同草原退化程度(即未退化、中度退化和严重退化)如何影响着内蒙古温带草原的土壤微生物组成、多样性和功能,其次是阐明哪些生物和非生物因素导致了这些变化。我们的研究主要通过高通量测序技术分析土壤微生物的群落组成,并且采用FAPROTAX工具和FUNGuild工具分别预测细菌群落和真菌群落的功能。研究发现:草原退化显著降低了土壤细菌的多样性,但对真菌多样性影响不大。地下生物量、土壤有机碳和总氮与细菌的多样性变化呈显著正相关关系。草原退化显著增加了绿弯菌门的相对丰度(由2.48%提高到8.40%),降低了厚壁菌门的相对丰度(由3.62%降低到1.08%)。其次,草原退化也显著增加了球囊菌门的相对丰度(从0.17%提高到1.53%),降低了担子菌门的相对丰度(从19.30%降低到4.83%)。致病菌的相对丰度在草原退化过程中显著下降。此外,草原退化对土壤细菌群落的功能有显著的影响,尤其是与土壤碳氮循环相关的土壤细菌群落。我们的结果表明,土壤细菌群落对草原退化的响应比真菌群落更敏感。Yang Yu Lang Zheng Yijun Zhou Weiguo Sang Jianing Zhao Lu Liu Chao Li Chunwang Xiao 2021Journal of Plant Ecology2021,14,3:5
3Location of rut stands vs. mating opportunities in Przewalski's gazelle: A field test of the "Resource-based Hypothesis" and "Female Traffic Version of the Hotspot Hypothesis"显示文摘Zhangqiang YOU Zhigang JIANG Chunwang LI 2011Current Zoology2011,57,6:4
4Glioblastoma vaccine tumor therapy research progress显示文摘Glioblastoma(GBM)is the most common primary malignancy of the central nervous system in adults.The prognosis for late-stage glioblastoma(World Health Organization grade IV astrocytic glioma)is very poor.Novel treatment options are sought after and evaluated by clinicians and researchers,and remarkable advances have been made in surgical techniques,radiotherapy,and chemotherapy.However,the treatment of glioblastoma remains extremely difficult and it can extend the lives of patients by only a few months.There has been notable progress in the field of immunotherapy,particularly with the use of tumor vaccines,for treating glioblastoma;especially peptide vaccines and cell-based vaccines such as dendritic cell vaccines and tumor cell vaccines.However,the results of the current clinical trials for vaccination are not satisfactory.This article reviews the progress in the development of vaccines for glioblastoma.Tong Zhao Chunwang Li Hongliang Ge Yuanxiang Lin Dezhi Kang 2022Chinese Neurosurgical Journal2022,8,2:3
5Biogeographical patterns of the diet of Palearctic badger:Is badger an earthworm specialist predator?显示文摘Badgers were hypothesized as an earthworm specialist predator.We reviewed spatial patterns and food habits of the Eurasian badger(Meles spp.) in relation to geographical variables like latitude,elevation,aspects,and environmental variables,such as temperature,snow cover depth,precipitation,primary productivity,and human influence.The relative frequencies of occurrence of food items in the diets of badgers in 19 studies across 22 localities worldwide were included in the analysis plus the data from our study on the badger diet on the Qinghai-Tibetan Plateau.Principal component analysis(PCA) was used to extract the main components of dietary composition.Multiple regression analysis was applied to reveal the relationship between trophic diversity and the main PCA factors and biogeographical variables.We found a clear latitudinal gradient in the dietary composition of badgers,which was characterized by a greater consumption of insects and reptile in southern area and a higher intake of earthworm in northern regions.Nevertheless,badgers are not an earthworm specialist predator.Furthermore,trophic diversity of badger diets was significantly positively correlated with latitude and human activity.Abundance and availability of foods appear to determine badger foraging tactics.Badgers are adept in exploiting local resources and our results confirm that badgers are generalist predators with opportunistic foraging behavior across their entire distribution range.LI Feng LUO ZhenHua LI ChunLin LI ChunWang JIANG ZhiGang 2013Chinese Science Bulletin2013,58,17:3
6Mapping Microscale Strain Fields Around a Crack Tip in Molybdenum Via Geometric Phase Analysis and Digital Image Correlation显示文摘Uniaxial tension tests were conducted on single-edge-notched tensile specimens of pure molybdenum with a mesh grid pattern in front of the notch. A series of images of crack initialization and propagation with a distorted mesh grid pattern were obtained by means of in situ scanning electron microscopy. Strain fields around the crack tip were mapped successively using geometric phase analysis and digital image correlation techniques, and then compared with the predictions obtained through linear elastic fracture mechanics(LEFM). The comparison shows that the measured strain distribution ahead of the crack tip is consistent with the LEFM predictions of up to 25 μm from the crack tip.Chunwang Zhao Wencai Li Jijun Li Yongxiang Li Quanlong Liu Lifu Wang Qingyu Hou Yongming Xing 2018Acta Mechanica Solida Sinica2018,31,3:3
7Experimental study of the spray characteristics of biodiesel based on inedible oil显示文摘Yuan Gao Jun Deng Chunwang Li Fengling Dang Zhuo Liao Zhijun Wu Liguang Li 2009Biotechnology Advances2009,,5:2
8Quantitative analysis of nanoscale deformation fields of a crack-tip in single-crystal silicon显示文摘A mode II crack in single-crystal silicon was investigated experimentally using high-resolution transmission electron microscopy.Geometric phase analysis and numerical moiré method were employed to map the deformation fields of the crack-tip area.The normal strain field maps of the crack-tip area indeed showed the deformation occurs primarily in the vicinity of the dislocations and the normal strains are near zero in the crack-tip area.The shear strain field map shows that the relatively large shear strain is in the crack-tip area.The experimental results were compared with the predictions of linear elastic fracture mechanics.The comparison shows that measured strain distribution ahead of the crack-tip agrees with the predictions of linear elastic fracture mechanics up to 1 nm from the crack-tip.ZHAO ChunWang XING YongMing 2012Science China(Physics,Mechanics & Astronomy)2012,55,6:2
9Low incidence of hepatitis B virus reactivation during chemotherapy among diffuse large B‐cell lymphoma patients who are HBsAg‐negative/?HBcAb‐positive: a multicenter retrospective study显示文摘DongmeiJi JunningCao XiaonanHong JunminLi JianminWang FangyuanChen ChunWang ShanhuaZou 2010European Journal of Haematology2010,,3:2
10No correlation between neonatal fitness and heterozygosity in a reintroduced population of P^re David's deer显示文摘Yan ZENG Chunwang LI Linyuan ZHANG Zhenyu ZHONG Zhigang JIANG 2013Current Zoology2013,59,2:2
11Effects of odors on behaviors of captive Amur leopards Panthera pardus orientalis显示文摘Captive environments often fail to resemble the wild environment in respects of limited space,unchanging habitat,lack of stimulus and contingency. Common animal welfare problems which occur in captive animals include low behavioral diversity,abnormal behavior and excessive inactivity. Environmental enrichment,as an effective strategy to tackle these problems and promote mental health of captive animals,has been recognized as an important principal for captive animal management. Among all the enrichment techniques,olfactory enrichment is a simple and effective method for improving the well-being of the olfactory sensitive felids. Behavioral problems were observed in six Amur leopards Panthera pardus orientalis at Beijing Zoological Garden. These were held in the older type exhibits which have now been rebuilt. These behaviors include stereotypic behavior and excessive inactivity caused by the spatially limited enclosures with low levels of stimuli. To determine the effects of predator,prey,and herb odors as potential enrichment materials for captive leopards,we conducted olfactory enrichment experiments for the leopards and tested the effects of nutmeg Myristica fragrans,feces of roe deer Capreolus capreolus and urine of Amur tiger Panthera tigris altaica to test for an increase in behavioral repertoire and activity. Odors provided in this study were also believed to improve the psychological and physiological health of individuals. To standardize the method of presentation the odors were introduced to the enclosures by rubbing or spraying onto a clean towel. Our results show that the selected three odors effectively increased the behavioral diversity. Ten new behavior types were observed in the nutmeg experiment,eight in the feces of roe deer experiment and six in the tiger urine experiment. Among the three odors,cats responded to nutmeg for the longest duration,followed by tiger urine and feces of roe deer. Leopards showed more play behavior in presence of nutmeg while more investigatory behavior in presences of feces of roe deer and tiger urine. Providing novel odors increased the spatial use of the exhibit and the animal's increased use of the logs,sleeping platforms and bars in the cages. Novel odors also significantly increased the overall activity of the leopards,but the effects were diminished in about threeShuangying YU Zhigang JIANG Hui ZHU Chunwang LI Enquan ZHANG Jinguo ZHANG Carin HARRINGTON 2009Current Zoology2009,55,1:2
12Temperature and symmetry energy of neutron-rich fragments in the 1A GeV^(124,136)Xe+Pb reactions显示文摘In this work we study the symmetry-energy coefficient of neutron-rich nuclei,and the temperature dependence of nuclear symmetry energy at low temperatures.An isobaric method is used to extract the symmetry-energy coefficients of neutron-rich nucleus(asym) at zero temperature(T) and asym/T at nonzero temperature in the measured 1A GeV124,136Xe+Pb reactions.T of fragment is obtained from the ratio of its asym to asym/T.The results show that,for fragment with the same neutron-excess(I=N Z),the heavier the fragment is,the higher T it has,and T tends to saturate around 1 MeV for the large mass fragments.It is also shown that the more neutron-rich the isobar is,the higher temperature it has.The T2dependence of symmetry energy of finite nucleus at low temperatures is verified by the extracted results.MA Chunwang QIAO Chunyuan WANG Shanshan LU Fangmei CHEN Li GUO Meiting 2013Nuclear Science and Techniques2013,24,5:2
13miR-34 is associated with poor prognosis of patients with gallbladder cancer through regulating telomere length in tumor stem cells显示文摘Ke Jin Yonghua Xiang Jing Tang Guangchun Wu Junwei Li Huaichun Xiao Chunwang Li Yuxiang Chen Jingfeng Zhao 2014Tumor Biology2014,,2:1
14An approach to interference-free cutter position for five-axis free-form surface side finishing milling显示文摘XIAO Chunwang YUAN Yu 2002Journal of Materials Processing Technology2002,123,19:1
15Status and future perspectives of energy consumption and its ecological impacts in the Qinghai–Tibet region显示文摘Xiaoge Ping Zhigang Jiang Chunwang Li 2010Renewable and Sustainable Energy Reviews2010,,1:1
16Comparison of the fine root dynamics of Populus euphratica forests in different hab- itats in the lower reaches of the Tarim River in Xinjiang, China, during the growing season 显示文摘Pei Zhiqin Xiao Chunwang Dong Dan 2012Journal of Forest Research2012,17,4:1
17Status and future perspectives of energy consumption and its ecological impacts in the Qinghai-Tibet region显示文摘Ping Xiaoge Jiang Zhigang Li Chunwang 2011Renewable and Sustainable Energy Reviews2011,15,1:1
18Flow injection spectrofluorimetric determination of carvedilol mediated by micelles显示文摘Rau′l A. Silva Chien ChunWang Liliana P. Ferna′ndez 0,,08:1
19Allometric relationships for below-and aboveground biomass of young scots pines显示文摘XIAO Chunwang CEULEMANS R 0,,1:1
20Synthesis and characteristics of thermoplastic elastomer based on polyamide-6显示文摘Yi Chunwang Peng Zhihan Wang Chaosheng 2011Polymer International2011,60,:1
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