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44篇 您的检索式:作者名="Qingyun Yan"
    题名 作者 年代 出处 被引量
1Plankton community composition in the Three Gorges Reservoir Region revealed by PCR-DGGE and its relationships with environmental factors显示文摘To explore the relationships between community composition and the environment in a reservoir ecosystem, plankton communities from the Three Gorges Reservoir Region were studied by PCR-denaturing gradient gel electrophoresis fingerprinting. Bacterial and eukaryotic operational taxonomic units (OTUs), generated by DGGE analysis of the PCR-amplified 16S and 18S rRNA genes, were used as surrogates for the dominant 'biodiversity units'. OTU composition among the sites was heterogeneous; 46.7% of the total bacterial OTUs (45) and 64.1% of the eukaryotic OTUs (39) were identified in less than half of the sampling sites. Unweighted pair group method with arithmetic averages (UPGMA) clustering of the OTUs suggested that the plankton communities in the Xiangxi Rive sites were not always significantly different from those from the Yangtze River sites, despite clear differences in their environmental characterizations. Canonical correspondence analysis (CCA) was applied to further investigate the relationships between OTU composition and the environmental factors. The first two CCA ordination axes suggested that the bacterial community composition was primarily correlated with the variables of NO3--N, dissolved oxygen (DO), and SiO32--Si, whereas, the eukaryotic community was mainly correlated with the concentrations of DO, PO43--P, and SiO32--Si.YAN Qingyun YU Yuhe FENG Weisong YU Zhigang CHEN Hongtao 2008Journal of Environmental Sciences2008,20,6:27
2Impacts of algal blooms removal by chitosan-modified soils on zooplankton community in Taihu Lake,China显示文摘It is important to assess the eflect on zooplankton when perform the environmental protection or restoration technology,especially removing algal blooms,because algae were the major primary producer in algal lakes.The influence on zooplankton community after half a year of algal blooms removed by chitosan-modified soils in Taihu Lake was assessed and the rationality of carrying out the process semiannually was evaluated in the present study.Morphological composition and genetic diversity of zooplankton community were investigated by microscope checkup and polymerase chain reaction-denatured gradient gel electrophoresis(PCR-DGGE) .A total of 44 zooplankton taxa(23 protozoa,17 rotifers,3 copepoda and 1 cladocera) were detected by microscope checkup,and a total of 91 bands(28 bands amplified by primers F1427-GC and R1616,63 bands amplified by primers Fung-GC and NS1) were detected by PCR-DGGE.The results of cluster analysis or detrended correspondence analysis indicated that there was no considerable diflerence in morphological composition of zooplankton and DGGE profiles between experimental and control sites,and DGGE profiles could represent the biologic diversity.The study showed that zooplankton community could recover original condition after half year of algal blooms removed by chitosan-modified soils and it was acceptable to apply this process semiannually.In addition,the results revealed that PCR-DGGE could be applied to investigate the impacts of the environmental protection or restoration engineering on zooplankton community diversity.Jiajia Ni Yuhe Yu Weisong Feng Qingyun Yan Gang Pan Bo Yang Xiang Zhang Xuemei Li 2010Journal of Environmental Sciences2010,22,10:8
3Genetic fingerprinting of plankton community provides new insights into aquatic ecology显示文摘在过去的二十年,分子的技术广泛地在生态的学习被使用了,分子的生态学在上生态学的最重要的分支。同时,基因采指纹分析显著地提高了我们差异的知识和板补品有机体的进化关系。与在生态的学习的常规途径相比(例如词法分类) ,在浮游生物研究的基因采指纹技术。这概述的目的是评定我们在哪儿,我们现在在哪儿并且什么为与分子水平的信息解决水的生态的问题的未来抓住。YAN Qingyun YU Yuhe FENG Weisong 2006Progress in Natural Science:Materials International2006,16,9:8
4Allele-defined genome reveals biallelic differentiation during cassava evolution显示文摘Dear Editor,Generation of heterozygous genomes by hybridization between or within species can help maintain plant diversity and serve as a potential source of new species(Baek et al.,2018).Moreover,genomic heterozygosity is associated with genomic coadaptation,developmental stability,and heterosis.Accurate definition of alleles in haplotypes is necessary to precisely characterize allelic variation controlling agriculturally important traits(Shi et al.,2019).Currently,most released genomes have mosaic assembly of haplotypes due to random selection or collapse of alleles during genome assembly(Shi et al.,2019),which masked allelic variation and functional differentiation of divergent alleles in heterozygous species.Wei Hu Changmian Ji Haitao shi Zhe Liang Zehong Ding Jianqiu Ye Wenjun Ou Gang Zhou Weiwei Tie Yan Yan Jinghao Yang Xiaoying Yang Yunxie Wei Zhiqiang Jin Jianghui Xie Ming Peng Wenquan Wang Anping Guo Biyu Xu Jianchun Guo Songbi Chen Liming Ma Mingcheng Wang Yang Zhou Xiaolong Li Ruoxi Li Siyi Guo Xinhui Xiao Zhongqing Wan Feifei An Jie Zhang Qingyun Leng Yin Li Ray Ming Kaimian Li 2021Molecular Plant2021,14,6:8
5Transcriptome analysis of blood stasis syndrome in subjects with hypertension显示文摘OBJECTIVE:To screen for m RNAs associated with blood stasis syndrome and to explore the genetic mechanisms of blood stasis syndrome in hypertension.METHODS:This study involved groups of patients with hypertension and blood stasis,including those with Qi deficiency,Qi stagnation,cold retention and heat retention;as well as hypertensive patients without blood stasis and healthy individuals.Human umbilical vein endothelial cells were co-cultured with the sera of these healthy individuals and patients with blood stasis syndrome.Total RNA was extracted from these cells and assessed by a high-throughput sequencing method(Solexa)and digital gene expression.Differentially expressed genes among these six groups were compared using whole genome sequences,and m RNAs associated with blood stasis syndrome identified.Differences in gene use and gene ontology function were an-alyzed.Genes enriched significantly and their pathways were determined,as were network interactions,and encoded proteins.Gene identities were confirmed by real-time polymerase chain reactions.RESULTS:Compared with cells cultured in sera of the blood stasis groups,those culture in sera of healthy individuals and of the non-blood stasis group showed 11 and 301 differences,respectively in stasis-related genes.Genes identified as differing between the blood stasis and healthy groups included activating transcription factor 4,activating transcription factor 3,DNA-damage inducible transcription factor 3,Tribbles homolog 3,CCAAT/enhancer binding protein-β,and Jun proto-oncogene(JUN).Pathway and protein interaction network analyses showed that these genes were associated with endoplasmic reticulum stress.Cells cultured in sera of patients with blood stasis and Qi deficiency,Qi stagnation,heat retention,and cold retention were compared with cells cultured in sera of patients with the other types blood stasis syndrome.The comparison showed differences in expression of 28,28,34,and 32 specific genes,respectively.CONCLUSION:The pathogenesis of blood stasis syndrome in hypertension is related to endoplasmic reticulum stress and involves the differential expression of the activating transcription factor 4,activating transcription factor 3,DNA-damage inducible transcription factor 3,Tribbles homolog 3,CCAAT/enhancer binding protein-β,and JUN genes.He Ling Fang Meixia Chen Liguo Zhou Jianhua Yuan Jing Xu Jing Shan Yan Xu Qingyun Xiong Tingting 2016Journal of Traditional Chinese Medicine2016,36,2:7
6Responses of ammonia-oxidizing microorganisms to biochar and compost amendments of heavy metals-polluted soil显示文摘Heavy metal pollution affects soil ecological function.Biochar and compost can effectively remediate heavy metals and increase soil nutrients.The effects and mechanisms of biochar and compost amendments on soil nitrogen cycle function in heavy-metal contaminated soils are not fully understood.This study examined how biochar,compost,and their integrated use affected ammonia-oxidizing microorganisms in heavy metal polluted soil.Quantitative PCR was used to determine the abundance of ammonia-oxidizing archaea(AOA)and bacteria(AOB).Ammonia monooxygenase(AMO)activity was evaluated by the enzymelinked immunosorbent assay.Results showed that compost rather than biochar improved nitrogen conversion in soil.Biochar,compost,or their integrated application significantly reduced the effective Zn and Cd speciation.Adding compost obviously increased As and Cu effective speciation,bacterial 16 S rRNA abundance,and AMO activity.AOB,stimulated by compost addition,was significantly more abundant than AOA throughout remediation.Correlation analysis showed that AOB abundance positively correlated with NO_(3)^(-)-N(r=0.830,P<0.01),and that AMO activity had significant correlation with EC(r=-0.908,P<0.01)and water-soluble carbon(r=-0.868,P<0.01).Those seem to be the most vital factors affecting AOB community and their function in heavy metal-polluted soil remediated by biochar and compost.Mingyue Li Jiachao Zhang Xiao Yang Yaoyu Zhou Lihua Zhang Yuan Yang Lin Luo Qingyun Yan 2021Journal of Environmental Sciences2021,33,4:5
7Metagenome-based analysis:A promising direction for plankton ecological studies显示文摘The plankton community plays an especially important role in the functioning of aquatic ecosystems and also in biogeochemical cycles. Since the beginning of marine research expeditions in the 1870s, an enormous number of planktonic organisms have been described and studied. Plankton investigation has become one of the most important areas of aquatic ecological study, as well as a crucial component of aquatic environmental evaluation. Nonetheless, traditional investigations have mainly focused on morphospecies composition, abundances and dynamics, which primarily depend on morphological identification and counting under microscopes. However, for many species/groups, with few readily observable characteristics, morphological identification and counting have historically been a difficult task. Over the past decades, microbiologists have endeavored to apply and extend molecular techniques to address questions in microbial ecology. These culture-independent studies have generated new insights into microbial ecology. One such strategy, metagenome-based analysis, has also proved to be a powerful tool for plankton research. This mini-review presents a brief history of plankton research using morphological and metagenome-based approaches and the potential applications and further directions of metagenomic analyses in plankton ecological studies are discussed. The use of metagenome-based approaches for plankton ecological study in aquatic ecosystems is encouraged.YAN QingYun YU YuHe 2011Science China(Life Sciences)2011,54,1:4
8CFD-Based Optimization of Hot Primary-Air Pipe Networks in Power Plant Milling Systems显示文摘A hot primary-air pipe system is the bridge connecting an air-preheater with a coal mill in power generation stations.The effective geometrical configuration of the pipe network greatly affects the air flow distribution and consequently influences the safe and economic operation of milling systems in power stations.In order to improve the properties of the air flow,in the present work the SIMPLEC method is used to simulate numerically the flow field for the original layout of the system.As a result,the internal mechanisms influencing the uneven pressure drop in each branch are explored and three optimization schemes are proposed accordingly.The numerical results indicate that,for the original layout,the local pressure drop of the tee section accounts for approximately 74%of the total drop of the system,with other pressure drops depending on the specific branch considered.It is shown that after optimization,a roughly balanced flow resistance and flow rate can be obtained.Compared with the original layout,the pressure drop relating to different branches is significantly reduced.Qingyun Yan You Li Yuanhong Zhu Kui Cheng Xueli Huang Cong Qi Xuemin Ye 2020Fluid Dynamics & Materials Processing2020,16,3:4
9Comparative study on the gut microbiotas of four economically important Asian carp species显示文摘Gut microbiota of four economically important Asian carp species(silver carp, Hypophthalmichthys molitrix; bighead carp,Hypophthalmichthys nobilis; grass carp, Ctenopharyngodon idella; common carp, Cyprinus carpio) were compared using 16 S rRNA gene pyrosequencing. Analysis of more than 590,000 quality-filtered sequences obtained from the foregut, midgut and hindgut of these four carp species revealed high microbial diversity among the samples. The foregut samples of grass carp exhibited more than 1,600 operational taxonomy units(OTUs) and the highest alpha-diversity index, followed by the silver carp foregut and midgut. Proteobacteria, Firmicutes, Bacteroidetes and Fusobacteria were the predominant phyla regardless of fish species or gut type. Pairwise(weighted) UniFrac distance-based permutational multivariate analysis of variance with fish species as a factor produced significant association(P<0.01). The gut microbiotas of all four carp species harbored saccharolytic or proteolytic microbes, likely in response to the differences in their feeding habits. In addition, extensive variations were also observed even within the same fish species. Our results indicate that the gut microbiotas of Asian carp depend on the exact species, even when the different species were cohabiting in the same environment. This study provides some new insights into developing commercial fish feeds and improving existing aquaculture strategies.Xinghao Li Yuhe Yu Chang Li Qingyun Yan 2018Science China(Life Sciences)2018,61,6:4
10Elastic Scattering of 7Be on Pb Target显示文摘Yang Yanyun Wang Jiansong Wang Qi Huang Meirong Ma Junbing Ma Peng Cao Xiguang Han Jianlong Bai Zhen Jin Shilong Hu Qiang Jin Lei Chen Jiangbo Zhang Xueying Chen Ruofu Hu Zhengguo Xu Shiwei Zhen Chuan Xu Zhiguo Xu Hushan Duan Liming Sun Zhiyu Chen Zhiqiang He Jianjun Li Songlin Lei Xiangguo Fu Fen Zhang Xueheng Yuan Xiaohua Du Chengming Yan Xinshuang Hu Jun Tang Shuwen Ye Ruiping Yang Kun Shi Fudong Zhang Wei Chen Ze Li Long Xu Xing Liu Longxiang Zhang Liyong Lin Qingyun Gou Boxing Xu Ge Zhou Xionghong Zhang Yuhu Xiao Guoqing 2011IMP & HIRFL Annual Report2011,,1:4
11ANALYSIS FOR GENE NETWORKS BASED ON LOGIC RELATIONSHIPS显示文摘Shudong WANG Yan CHEN Qingyun WANG Eryan LI Yansen SU Dazhi MENG 2010Journal of Systems Science & Complexity2010,23,5:3
12Improving Airgun Signal Detection with Small-Aperture Seismic Array in Yunnan显示文摘Repeating airgun sources are eco-friendly sources for monitoring the changes in the physical properties of subsurface mediums,but their signals decay quickly and are buried in the noises soon after traveling short distances.Stacking waveforms from different airgun shots recorded by a single seismic station(shot stacking)is the most popular technique to detect weak signals from noisy backgrounds,and has been widely used to process the data of Fixed Airgun Signal Transmission Stations(FASTS)in China.However,shot stacking sacrifices the time resolution in monitoring to recover a qualified airgun signal by stacking many shots at distance stations,and also suffers from persistent local noises.In this paper,we carried out several small-aperture seismic array experiments around the Binchuan FAST Station(BCFASTS)in Yunnan Province,China,and applied the array technique to improve airgun signal detection.The results show that seismic array processing combining with shot stacking can suppress seismic noises more efficiently,and provide better signal-to-noise ratio(SNR)and coherent airgun signals with less airgun shots.This work suggests that the array technique is a feasible and promising tool in FAST to increase the time resolution and reduce noise interference on routine monitoring.WANG Weijun ZHOU Qingyun KOU Huadong LIU Guiping ZHU Hongbo YAN Kun 2019Earthquake Research in China2019,33,2:3
13Effects of components in culture medium on glutamate decarboxylase activity and γ-aminobutyric acid accumulation in foxtail millet ( Setaria italica L.) during germination显示文摘Qingyun Bai Meiqing Chai Zhenxin Gu Xiaohong Cao Yan Li Kunlun Liu 2009Food Chemistry2009,,1:2
14Genomic decoding of breeding history to guide breeding-by-design in rice显示文摘Deciphering the intrinsic molecular logic of empirical crop breeding from a genomic perspective is a decisive prerequisite for breeding-by-design(BbD),but remains not well established.Here,we decoded the historical features of past rice breeding by phenotyping and haplotyping 546 accessions covering the majority of cultivars bred in the history of Northeast China(NEC).We revealed that three groups founded the genetic diversities in NEC rice with distinct evolution patterns and traced and verified the breeding footprints to known or genome-wide association study(GWAS)-detected quantitative trait loci(QTLs),or introgressions from indica sub-species with chronological changes in allele frequencies.Then we summarized a rice breeding trend/principle in NEC,and combined with the successful example in breeding and application of Zhongkefa5 to demonstrate the guiding value of our conclusion for BbD in practice.Our study provides a paradigm for decoding the breeding history of a specific crop to guide BbD,which may have implications in different crop breeding.Zhuo Chen Qingyun Bu Guifu Liu Maoqing Wang Hongru Wang Huazhao Liu Xiufeng Li Hong Li Jun Fang Yan Liang Zhenfeng Teng Sai Kang Hong Yu Zhukuan Cheng Yongbiao Xue Chengzhi Liang Jiuyou Tang Jiayang Li Chengcai Chu 2023National Science Review2023,10,5:1
15Graphene-Based Photo-Fenton Catalysts for Pollutant Control显示文摘Water pollution is a global environmental issue with multi-dimensional infl uences on human life.Some strategies,such as photo-Fenton reaction,have been employed to remove recalcitrant pollutants.Two-dimensional(2D)graphene and its threedimensional(3D)confi gurations have attracted considerable attention as emerging carbon-based catalysts in photo-Fenton fi elds owing to their alluring properties in electron transfer,reactant adsorption,and light response.This review summarizes the recent developments in 2D and 3D graphene-based catalysts for photo-Fenton reactions.Their structures,characteristics,activity,and mechanisms are discussed.The conclusions and outlooks are proposed for the profound understanding of challenges and future directions.Yan Bao Qingyun Yan Jiahui Ji Bocheng Qiu Jinlong Zhang Mingyang Xing 2021Transactions of Tianjin University2021,27,2:1
16Risk factors of recurrent acute pancreatitis after conservative treatment in pediatric population: a single-center study显示文摘Background Although complete resolution and recovery occurs in most children with an initial attack of acute pancreatitis(AP),a subset of children may progress to recurrent AP(RAP).RAP has serious effects to the individual and the socioeconomic burden.The aim of this project was to identify the independent risk factors for pediatric RAP so as to provide evidence for its prevention,early diagnosis and treatment.Methods A retrospective cohort study of children discharged from Tianjin Children’s Hospital from June 2017 to January 2020 was performed.Demographic and clinical variables,treatment strategies,clinical course and outcomes were collected.Independent risk factors of RAP were identified using the logistic regression model.Results Of the total 96 enrolled children,30(31.3%)developed RAP during the follow-up period.The majority(27/30,90%)of the children with AP developed RAP within 6 months of their first AP attack.The presence of systemic inflammatory response syndrome(SIRS)[odds ratio(OR)=6.652,95%confidence interval(CI)1.989 to 22.247],fasting time(OR=1.267,95%CI 1.104 to 1.583),whether meet all three AP diagnostic criteria(OR=7.438,95%CI 1.346 to 41.103)and abnormal amylase/lipase value on the seventh day of hospitalization(OR=3.601,95%CI 0.972 to 13.342)were independent risk factors of RAP in children.Conclusions Most children who developed RAP had progressed within 6 months after their first episode of AP.RAP was more common in children who met all three AP diagnostic criteria at initial attack and in children with SIRS,long fasting time and abnormal amylase/lipase value on the seventh day of hospitalization.Qipeng Zheng Xueqiang Yan Liang Ge Shujian Zhang Yan Sun Jinfu Jia Shengqiao Zhao Xiaodan Xu Ran Dou Qingyun Gou Jinfeng Zhao Jianghua Zhan 2021World Journal of Pediatric Surgery2021,4,1:1
17RNA interference targeting VP1 inbihits Foot-and-Mouth disease virus replication in BHK-21 and Suckling mice显示文摘Weizao Chen Weiyao Yan Qingyun Du 2004Virology2004,78,13:1
18Effects of components in culture medium on glutamate decarboxylase activity and γ-aminobutyric acid accumulation in foxtail millet ( Setaria italica L.) during germination显示文摘Qingyun Bai Meiqing Chai Zhenxin Gu Xiaohong Cao Yan Li Kunlun Liu 2009Food Chemistry2009,,1:1
19A new method for fabricating a CuO/TiO 2 nanotube arrays electrode and its application as a sensitive nonenzymatic glucose sensor显示文摘Shenglian Luo Fang Su Chengbin Liu Juanxiu Li Ronghua Liu Yan Xiao Yue Li Xuanneng Liu Qingyun Cai 2011Talanta2011,,:1
20Metagenomic insights into the effects of submerged plants on functional potential of microbial communities in wetland sediments显示文摘Submerged plants in wetlands play important roles as ecosystem engineers to improve self-purification and promote elemental cycling.However,their effects on the functional capacity of microbial communities in wetland sediments remain poorly understood.Here,we provide detailed metagenomic insights into the biogeochemical potential of microbial communities in wetland sediments with and without submerged plants(i.e.,Vallisneria natans).A large number of functional genes involved in carbon(C),nitrogen(N)and sulfur(S)cycling were detected in the wetland sediments.However,most functional genes showed higher abundance in sediments with submerged plants than in those without plants.Based on the comparison of annotated functional genes in the N and S cycling databases(i.e.,NCycDB and SCycDB),we found that genes involved in nitrogen fixation(e.g.,nifD/H/K/W),assimilatory nitrate reduction(e.g.,nasA and nirA),denitrification(e.g.,nirK/S and nosZ),assimilatory sulfate reduction(e.g.,cysD/H/J/N/Q and sir),and sulfur oxidation(e.g.,glpE,soeA,sqr and sseA)were significantly higher(correctedp<0.05)in vegetated vs.unvegetated sediments.This could be mainly driven by environmental factors including total phosphorus,total nitrogen,and C:N ratio.The binning of metagenomes further revealed that some archaeal taxa could have the potential of methane metabolism including hydrogenotrophic,acetoclastic,and methylotrophic methanogenesis,which are crucial to the wetland methane budget and carbon cycling.This study opens a new avenue for linking submerged plants with microbial functions,and has further implications for understanding global carbon,nitrogen and sulfur cycling in wetland ecosystems.Binhao Wang Xiafei Zheng Hangjun Zhang Xiaoli Yu Yingli Lian Xueqin Yang Huang Yu Ruiwen Hu Zhili He Fanshu Xiao Qingyun Yan 2021Marine Life Science & Technology2021,3,4:1
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