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| 1 | H7N9 virulent mutants detected in chickens in China pose an increased threat to humans显示文摘 | Jianzhong Shi Guohua Deng Huihui Kong Chunyang Gu Shujie Ma Xin Yin Xianying Zeng Pengfei Cui Yan Chen Huanliang Yang Xiaopeng Wan Xiurong Wang Liling Liu Pucheng Chen Yongping Jiang Jinxiong Liu Yuntao Guan Yasuo Suzuki Mei Li Zhiyuan Qu Lizheng Guan Jinkai Zang Wenli Gu Shuyu Han Yangming Song Yuzhen Hu Zeng Wang Linlin Gu Wenyu Yang Libin Liang Hongmei Bao Guobin Tian Yanbing Li Chuanling Qiao Li Jiang Chengjun Li Zhigao Bu Hualan Chen | 2017 | Cell Research2017，27，12： | 70 |
| 2 | Plant Prime Editors Enable Precise Gene Editing in Rice Cells显示文摘Genome editing is revolutionizing plant research and crop breeding.Sequence-specific nucleases(SSNs)such as zinc finger nuclease(ZFN)and TAL effector nuclease(TALEN)have been used to create site-specific DNA double-strand breaks and to achieve precise DNA modifications by promoting homology-directed repair(HDR)(Steinert et al.,2016;Voytas,2013).Later,RNA-guided SSNs such as CRISPR-Cas9,Cas12a,Cas12b,and their variants were applied for genome editing in plants(Li et al.,2013;Nekrasov et alM 2013;Tang et al.,2017;Zhong et al.,2019;Ming et al.,2020;Tang et al.,2019).However,HDR relies on simultaneous delivery of SSNs and DNA donors,which has been challenging in plants(Steinert et al.,2016;Zhang et aL,2019).Another challenge for realizing efficient HDR in plants is that DNA repair favors nonhomologous end joining(NHEJ)pathways over HDR in most cell types(Puchta,2005;Qi et al.,2013). | Xu Tang Simon Sretenovic Qiurong Ren Xinyu Jia Mengke Li Tingting Fan Desuo Yin Shuyue Xiang Yachong Guo Li Liu Xuelian Zheng Yiping Qi Yong Zhang | 2020 | Molecular Plant2020，13，5： | 20 |
| 3 | Increasing trend of prevalence of infertility in Beijing显示文摘 | Zhang Hongxia Wang Shuyu Zhang Songwen Wang Tao Deng Xiaohong | 2014 | Chinese Medical Journal2014，，4： | 16 |
| 4 | Effect of Gastrodin on Early Brain Injury and Neurological Outcome After Subarachnoid Hemorrhage in Rats显示文摘Gastrodin is a phenolic glycoside that has been demonstrated to provide neuroprotection in preclinical models of central nervous system disease, but its effect in subarachnoid hemorrhage(SAH) remains unclear. In this study, we showed that intraperitoneal administration of gastrodin(100 mg/kg per day) significantly attenuated the SAH-induced neurological deficit, brain edema, and increased blood-brain barrier permeability in rats. Meanwhile, gastrodin treatment significantly reduced the SAHinduced elevation of glutamate concentration in the cerebrospinal fluid and the intracellular Ca2+ overload.Moreover, gastrodin suppressed the SAH-induced microglial activation, astrocyte activation, and neuronal apoptosis. Mechanistically, gastrodin significantly reduced the oxidative stress and inflammatory response, up-regulated the expression of nuclear factor erythroid 2–related factor2, heme oxygenase-1, phospho-Akt and B-cell lymphoma2, and down-regulated the expression of BCL2-associated X protein and cleaved caspase-3. Our results suggested that the administration of gastrodin provides neuroprotection against early brain injury after experimental SAH. | Xinzhi Wang Shuyue Li Jinbang Ma Chuangang Wang Anzhong Chen Zhenxue Xin Jianjun Zhang | 2019 | Neuroscience Bulletin2019，35，3： | 15 |
| 5 | A preliminary study on measurements of black carbon in the atmosphere of northwest Qilian Shan显示文摘Black carbon (BC) concentration and meteorological data are measured discontinuously from May 2009 to March 2011,at the Qilian Shan Station of Glaciology and Ecologic Environment (hereafter 'QSSGEE'),located near the terminal of the Laohugou No.12 Glacier in northwestern Qilian Shan,China.We measured the daily,monthly and seasonal variations of BC concentration in the atmosphere and discussed the possible emission sources.Black carbon background concentration in this region varied in the range of 18-72 ng/m 3 with the highest in summer and the lowest in autumn.The relations between BC concentration and surface wind direction indicated that BC concentration was higher when northwest wind prevails while lower when southeast wind prevails.Air masses backward trajectories showed the potential emission sources in the northwest.Significant positive correlations between daily mean BC concentration and relative humidity indicated that BC might be one of important cloud condensation nuclei.This hypothesis needs to be confirmed further through cloud microphysical features in this region. | Shuyu Zhao Jing Ming Cunde Xiao Weijun Sun Xiang Qin | 2012 | Journal of Environmental Sciences2012，24，1： | 9 |
| 6 | Comparative efficacy and safety of Chinese herbal injections combined with transcatheter hepatic arterial chemoembolization in treatment of liver cancer: a bayesian network Meta-analysis显示文摘OBJECTIVE: To address the optimal Chinese herbal injections(CHIs) against liver cancer, the present network Meta-analysis is designed to investigate the comparative efficacy and safety of different CHIs.METHODS: Several electronic databases were searched up to June 1 st, 2017. The quality assessment was conducted and network Meta-analysis was performed to compare the efficacy and safety of different CHIs plus transcatheter hepatic arterial chemoembolization(TACE). Primary outcomes were 1-year and 2-year survival rate, the secondary outcomes includes the clinical effective rate, performance status and the adverse reactions(ADRs). Data analysis was applied Stata 13.0 and Win BUGS 1.4 software.RESULTS: A total of 105 randomized controlled trials(RCTs) were identified for inclusion in this analysis, with data for 7683 patients and 13 CHIs. The results suggested that Javanica oil emulsion,Huachansu injection plus TACE were more favorable for 1-year and 2-year survival rate than other CHIs. Kanglaite, Astragalus polysaccharide injection plus TACE showed superiority in the clinical effective rate and performance status over other CHIs.And Shenmai injection plus TACE was superior to reducing ADRs than other CHIs for patients with liver cancer.CONCLUSION: Our findings indicated that receiving CHIs combined with TACE may have therapeutic benefits for patients with liver cancer in improving survival rate, clinical effective rate, the performance status and alleviating the ADRs. | Zhang Dan Wang Kaihuan Zheng Jiewen Wu Jiarui Duan Xiaojiao Ni Mengwei Liu Shuyu Zhang Bing Zhao Yi | 2020 | Journal of Traditional Chinese Medicine2020，40，2： | 9 |
| 7 | An update: Epstein-Barr virus and immune evasion via microRNA regulation显示文摘Epstein-Barr virus(EBV) is an oncogenic virus that ubiquitously establishes life-long persistence in humans. To ensure its survival and maintain its B cell transformation function, EBV has developed powerful strategies to evade host immune responses. Emerging evidence has shown that micro RNAs(mi RNAs) are powerful regulators of the maintenance of cellular homeostasis. In this review, we summarize current progress on how EBV utilizes mi RNAs for immune evasion. EBV encodes mi RNAs targeting both viral and host genes involved in the immune response. The mi RNAs are found in two gene clusters, and recent studies have demonstrated that lack of these clusters increases the CD4^+ and CD8^+ T cell response of infected cells. These reports strongly indicate that EBV mi RNAs are critical for immune evasion. In addition, EBV is able to dysregulate the expression of a variety of host mi RNAs, which influence multiple immune-related molecules and signaling pathways. The transport via exosomes of EBV-regulated mi RNAs and viral proteins contributes to the construction and modification of the inflammatory tumor microenvironment.During EBV immune evasion, viral proteins, immune cells, chemokines, pro-inflammatory cytokines, and pro-apoptosis molecules are involved. Our increasing knowledge of the role of mi RNAs in immune evasion will improve the understanding of EBV persistence and help to develop new treatments for EBV-associated cancers and other diseases. | Lielian Zuo Wenxin Yue Shujuan Du Shuyu Xin Jing Zhang Lingzhi Liu Guiyuan Li Jianhong Lu | 2017 | Virologica Sinica2017，32，3： | 9 |
| 8 | Middle-Miocene transformation of tectonic regime in the Himalayan orogen显示文摘Understanding the multiple tectonic transformations during the Himalayan orogeny is significant in evaluating the evolution of Himalayan orogen.In the Gyirong area in south Tibet,deformed leucogranitic veins in the biotite-plagioclase gneisses of Greater Himalayan crystalline complex(GHC) constitute south-vergent asymmetric folds.The reconstruction of the veins shows that they experienced two generations of deformation under different tectonic regimes:an earlier top-to-north extension and a later top-to-south thrusting,implying a tectonic transformation from N-S extension to N-S shortening.Zircons LA-ICP-MS U-Pb dating of the leucogranite shows that it was emplaced during 21.03-18.7 Ma.The data suggest that the tectonic transformation occurred after 18.7 Ma.The chronological data of South Tibet detachment system(STDS) and North-South trending rift(NSTR) from Gyirong and other areas indicate that the Himalayan orogeny was in a period of tectonic transformation from N-S extension to N-S shortening during 19-13 Ma.The transformation of tectonic regime was probably controlled by the India-Asia convergence rate.An increase in the convergence rate resulted in N-S shortening of the orogen,thrusting and folding,with coeval formation of the NSTR in Tibet.A decrease in the convergence rate led to N-S extension and reactivation of the STDS. | WANG XiaoXian ZHANG JinJiang LIU Jiang YAN ShuYu WANG JiaMin | 2013 | Chinese Science Bulletin2013，58，1： | 8 |
| 9 | The Arabidopsis homologs of CCR4-associated factor 1 show mRNA deadenylation activity and play a role in plant defence responses显示文摘在真核细胞的房间的送信人 RNA (mRNA ) 周转以弄短开始 poly 在 3 鈥 ? 结束的(A) 尾巴,一个过程叫了 deadenylation。在酵母, deadenylation 反应被 CCR4 和联系 CCR4 的因素主要调停 1 (CAF1 ) ,描述得好的蛋白质建筑群的二个部件 CCR4 不说出。我们这里报导那 AtCAF1a 和 AtCAF1b,酵母 CAF1 基因的通常认为的 Arabidopsis 相当或相同的事物,部分面对咖啡因或在高温度补充酵母 caf1 异种的生长缺点。AtCAF1a 和 AtCAF1b 的表示被多重压力相关的荷尔蒙和刺激导致。在 vitro 的 AtCAF1a 和在预言的活跃地点的点变化破坏这项活动。破坏 AtCAF1a 或 AtCAF1b 的表示的 T-DNA 插入异种在压力相关的 mRNAs 的 deadenylation 是有缺点的,显示二 AtCAF1 蛋白质涉及在 vivo 的调整 mRNA deadenylation。有趣地, AtCAF1a 和 AtCAF1b 表演的单个、双的异种减少了表示致病相关( PR )基因 PR1 和 PR2 并且更产生 Pseudomonas syringae pv 西红柿 DC3000 ( Pst DC3000 )感染,而转基因的植物过去表示的 AtCAF1a 表演提高了 PR1 和 PR2 的表示并且增加了抵抗到一样的病原体。我们的结果在到病原体感染的调整 mRNA deadenylation 和防卫回答建议 AtCAF1 蛋白质的角色。 | Wenxing Liang Changbao Li Fang Liu Hongling Jiang Shuyu Li Jiaqiang Sun Xiaoyan Wu Chuanyou Li | 2009 | Cell Research2009，19，3： | 8 |
| 10 | Self-powered nanofiber-based screen-print triboelectric sensors for respiratory monitoring显示文摘科学、商业的进展将高要求放为便携电子学。然而,便携电子学的电源供应, breathability,和大量生产仍然有需要被克服的许多挑战。在这研究,一个自我动力的基于 nanofiber 的摩擦电传感器(SNTS ) 被批规模制造技术用 electrospinning 制作并且为经由呼吸监视监视的健康打印屏幕。典型地,一个拱门结构的 SNTS 被 nanofiber 膜和一个 Ag nanoparticle 电极装配。nanofibers 的堆积和 Ag nanoparticles 的传导性的网络越过整个设备保证一条煤气的隧道。当时, SNTS 的煤气的渗透象 6.16 mm/s 一样高,它有压到优势的优点与由密封演员组电影组成的通常使用的便携设备相比。由于 nanofiber 膜的柔软,不管它是否被弄弯,扭曲,或合拢, SNTS 显示出优秀电子输出性能。优异性质 SNTS 的皮友好,自我力量,和批制造例如 breathability,在保健监视和多功能的聪明的系统为他们的申请提供巨大的潜力。 | Ran Cao diaona Wang Shuyu Zhao Wei Yang Zuqing Yuan Yingying Yin Xinyu Du Nian-Wu Li Xiuling Zhang Xiuyan Li Zhong Lin Wang Congju Li | 2018 | Nano Research2018，11，7： | 8 |
| 11 | Kallistatin,a new and reliable biomarker for the diagnosis of liver cirrhosis显示文摘Kallistatin,which protects organs and cells against inflammation,fibrosis and oxidative stress,is mainly synthesized and secreted in liver.However,its relationship to human liver disease remains unclear.The purpose of this study was to explore the relationship between serum kallistatin and clinical evidence of both cirrhosis and hepatocellular carcinoma(HCC),and to determine if serum kallistatin levels could be used as a diagnostic indicator of hepatic health status,especially human liver cirrhosis(LC).Our cohort consisted of 115 patients with clinically proven liver fibrosis(LF),LC,or HCC by liver biopsies,and 31 healthy controls(CON).Serum kallistatin levels were quantified by ELISA.Results of the present study demonstrated that irrespective of the underlying etiology,serum kallistatin levels were significantly lower in the LF/LC group when compared with the CON group.A decrease in serum kallistatin levels appeared to reflect the extent of cirrhosis,with the lowest levels associated with higher grades of cirrhosis.Patients with LC had a noticeable correlation between serum kallistatin levels and other serum biochemical indicators.The area under the curve(AUC) for LC,viral liver cirrhosis(VLC)and alcoholic liver cirrhosis(ALC) was 0.845,0.757 and 0.931,respectively.In conclusion,our findingsdemonstrated that kallistatin,a plasma protein produced by the liver,can be a useful and reliable diagnostic indicator of hepatic health status,especially for LC. | Zhiyun Cheng Yinghui Lv Suqiu Pang Ruyu Bai Mingxi Wang Shuyu Lin Tianwen Xu Duncan Spalding Nagy Habib Ruian Xu | 2015 | Acta Pharmaceutica Sinica B2015，5，3： | 7 |
| 12 | Protective effects of human umbilical cord mesenchymal stem cell-derived conditioned medium on ovarian damage显示文摘Chemotherapeutic agents are extensively used to treat malignancies.However,chemotherapy-induced ovarian damage and reduced fertility are severe side effects.Recently,stem cell transplantation has been reported to be an effective strategy for premature ovarian insufficiency(POI)treatment,but safety can still be an issue in stem cell-based therapy.Here,we show the protective effects of human umbilical cord mesenchymal stem cell-derived conditioned medium(hUCMSC-CM)on a cisplatin(Cs)-induced ovarian injury model.hUCMSC-CM can relieve Cs-induced depletion of follicles and preserve fertility.In addition,hUCMSC-CM can decrease apoptosis of oocytes and granulosa cells induced by Cs.RNA sequencing analysis reveals the differentially expressed genes of ovaries after Cs and hUCMSC-CM treatments,including genes involved in cell apoptosis.Furthermore,we show that the granulocyte colony-stimulating factor(G-CSF)/phosphatidylinositol 3-kinase(PI3K)/protein kinase B(Akt)pathway plays an important role in protecting granulosa cells from Cs-induced apoptosis.Together,we confirm the protective effects of hUCMSC-CM on ovarian reserve and fertility in mice treated with Cs,highlighting the remarkable therapeutic effects of hUCMSC-CM. | Liming Hong Long Yan Zhimin Xin Jie Hao Wenjing Liu Shuyu Wang Shujie Liao Hongmei Wang Xiaokui Yang | 2020 | Journal of Molecular Cell Biology2020，12，5： | 7 |
| 13 | Bathymetric Prediction from Multi-source Satellite Altimetry Gravity Data显示文摘According to the 'theoretical admittance ' and the 'observation admittance' of the actual data,the theoretical value of effective elastic thickness in the study area was 10 km.Combining the gravity anomalies and vertical gravity gradient anomalies,the admittance function is used to construct the 1′×1′ bathymetry model over the Philippine Sea by using the adaptive weighting technique.It is found that the accuracy of the bathymetry model constructed is the highest when the ratio of inversion result of vertical gravity gradient anomalies and inversion result of gravity anomalies is 2∶3.At the same time,using multi-source gravity data to predict bathymetry could synthesize the superiority of gravity anomalies and vertical gravity gradient anomalies on the different seafloor topography,and the accuracy is better than bathymetry model that only used gravity anomalies or vertical gravity gradient anomalies.Taking the ship test data as the checking condition,the accuracy of predicting model is slightly lower than that of V18.1 model and improved by 27.17% and 39.02% respectively compared with the ETOPO1 model and the DTU10 model.Check points which the absolute value of the relative error of the predicting model is in the range of 5% accounted for 94.25% of the total. | Diao FAN Shanshan LI Shuyu MENG Chi ZHANG Jinkai FENG Yan HUANG Jiawei DU Zhibin XING | 2019 | Journal of Geodesy and Geoinformation Science2019，2，1： | 6 |
| 14 | Numerical simulation of a buried hot crude oil pipeline during shutdown显示文摘In this paper a mathematical model is built for a buried hot crude oil pipeline during shutdown,and an unstructured grid and polar coordinate grid are respectively applied to generating grids for the soil region and the three layers in the pipe(wax layer,pipe wall,and corrosion-inhibiting coating) . The governing equations are discretized using the fi nite volume method. The variations in temperatures of static oil and soil were investigated during pipeline shutdown in both summer and winter,in which some important parameters of the soil and crude oils of a Northeast pipeline are employed. | Xu Cheng Yu Bo Zhang Zhengwei Zhang Jinjun Wei Jinjia Sun Shuyu | 2010 | Petroleum Science2010，7，1： | 6 |
| 15 | A novel lineage of osteoprogenitor cells with dual epithelial and mesenchymal properties govern maxillofacial bone homeostasis and regeneration after MSFL显示文摘Bone regeneration originates from proliferation and differentiation of osteoprogenitors via either endochondral or intramembranous ossifcation;and the regeneration capacities decline with age and estrogen loss.Maillary sinus floor lifting(MSFL)is a commonly used surgical procedure for guiding bone regeneration in mailla.Radiographic analysis of 1210 clinical cases of maxilla bone regeneration after MSFL revealed that the intrasinus osteogenic eficacy was independent of age and gender,however;and this might be related to the Schneiderian membrane that lines the sinus cavity.In view of the particularity of this biological process,our present study aimed to elucidate the underlying mechanism of MSFL-induced bone regeneration.We frst established a murine model to simulate the clinical MSFL.By single cell RNA-sequencing and flow cytometry-based bulk RNA-sequencing,we identifed a novel Krt14^(+)Ctsk^(+)subset of cells that display both epithelial and mesenchymal properties and the transcriptomic feature of osteoprogenitors.Dual recombinases-mediated lineage tracing and oss-offunction analyses showed that these Krt14^(+)Ctsk^(+)progenitors contribute to both MSFL-induced osteogenesis and physiological bone homeostasis by differentiating into Krt14 Ctsk^(+)descendants which show robust osteogenic capacity.In addition,we detected a similar population of Kt14^(+)Ctsk^(+)cells in human samples of Schneiderian membrane,which show a highly similar osteogenic potential and transcriptomic feature to the corresponding cells in mice.The identifcation of this Krt14^(+)Ctsk^(+)population,featured by osteoprogenitor charateristics and dual epithelial-mesenchymal properties,provides new insight into the understanding of bone regeneration and may open more possibilities for clinical applications. | Yuteng Weng Haicheng Wang Di Wu Shuyu Xu Xiaofan Chen Jie Huang Yanhuizhi Feng Lin Li Zuolin Wang | 2022 | Cell Research2022，32，9： | 5 |
| 16 | New indicators from bedding-parallel beef veins for the fault valve mechanism显示文摘Beef structures(bedding-parallel veins of fibrous calcite)are widespread within the Lower Triassic carbonate rocks in the Sichuan Basin of China,especially within clay-rich strata of low permeability.In the veins,fibrous calcite occurs in the outer zones,and coarse equant calcite in the inner zones.At least two generations of calcite crystallization took place during aqueous alteration,at the same time as deformation recorded by the calcite.The first-generation calcite fibers are at steep angles to the hydrocarbon-bearing host beds,and they grew vertically against the force of gravity at a time when the source rocks were maturing.Second-generation calcite occurs as coarse equant grains that sealed pores via localized fluid flow during horizontal tectonic compression,so that shear stresses acted at the fracture margins.Shearing of the host rock was accommodated in part by dissolution-precipitation creep(DPC),grain rotation,and grain slippage,recorded in crystallographic preferred orientations(CPOs)of the host calcite grains beside the crack walls.The beef veins formed during high pore-fluid overpressures along hydrofractures.We propose that the bedding-parallel veins with beef structures are evidence of a'crack-seal slip'fault valve process during hydrocarbon generation.The hydrocarbon-bearing calcite beef structure may be a good indicator of oil or gas migration,and of the flow direction of aqueous solutions. | ZHANG Bo YIN CongYuan GU ZhiDong ZHANG JinJiang YAN ShuYu WANG Yang | 2015 | Science China Earth Sciences2015，58，8： | 5 |
| 17 | A review of silicon-based wafer bonding processes,an approach to realize the monolithic integration of Si-CMOS and III-V-on-Si wafers显示文摘The heterogeneous integration of III-V devices with Si-CMOS on a common Si platform has shown great promise in the new generations of electrical and optical systems for novel applications,such as HEMT or LED with integrated control circuitry.For heterogeneous integration,direct wafer bonding(DWB)techniques can overcome the materials and thermal mismatch issues by directly bonding dissimilar materials systems and device structures together.In addition,DWB can perform at wafer-level,which eases the requirements for integration alignment and increases the scalability for volume production.In this paper,a brief review of the different bonding technologies is discussed.After that,three main DWB techniques of single-,double-and multi-bonding are presented with the demonstrations of various heterogeneous integration applications.Meanwhile,the integration challenges,such as micro-defects,surface roughness and bonding yield are discussed in detail. | Shuyu Bao Yue Wang Khaw Lina Li Zhang Bing Wang Wardhana Aji Sasangka Kenneth Eng Kian Lee Soo Jin Chua Jurgen Michel Eugene Fitzgerald Chuan Seng Tan Kwang Hong Lee | 2021 | Journal of Semiconductors2021，42，2： | 5 |
| 18 | The effects of vegetation restoration strategies and seasons on soil enzyme activities in the Karst landscapes of Yunnan, southwest China显示文摘Soil enzymes play a vital role in biogeochemical cycling and ecosystem functions.In this study,we examined the response of six soil enzymes to changes in physicochemical properties resulting from changes in season and vegetation and geological conditions.Catalase,urease,acid phosphatase,invertase,amylase,and cellulase not only promote carbon,nitrogen,and phosphorus cycling,but also participate in the decomposition of harmful substances.Thirty-six soil samples were collected from karst and non-karst areas in two different seasons and from three different types of vegetation in Yunnan province,southwest China.Both vegetation types and season had significant effects on soil physicochemical properties and enzyme activities.In the same plot,soil water content,electrical conductivity,organic carbon,total nitrogen,and total phosphorus increased in the rainy season,indicating enhanced microbial metabolic activity.With the exception of urease activity,the remaining five enzymes showed higher activity in the rainy season.Changes in activities between the two seasons were significant in all samples.In the same season,activity levels of soil enzymes were higher in karst areas than in non-karst areas,and higher in natural forest than in artificial forests.The transformative abilities of soil elements are higher in karst areas than in non-karst areas,and higher in natural forests than in artificial forests.Correlation analysis showed that the activities of the six enzymes correlated significantly;however,soil physical and chemical indices,such as organic matter,pH,and moisture,which are essential for enzyme activity,differed by season.Redundancy analysis also revealed that the main factors influencing enzyme activity differed between the two seasons.The results from this study provide a theoretical basis for further research on the restoration of natural ecological systems in karst landscapes. | Zhouzhou Fan Shuyu Lu Shuang Liu Zhaorong Li Jiaxin Hong Jinxing Zhou Xiawei Peng | 2020 | Journal of Forestry Research2020，31，5： | 5 |
| 19 | Responses of plant community to the linkages in plant-soil C:N:P stoichiometry during secondary succession of abandoned farmlands,China显示文摘Succession is one of the central themes of ecology;however,the relationship between aboveground plant communities and underground soils during secondary succession remains unclear.In this study,we investigated the composition of plant community,plant-soil C:N:P stoichiometry and their relationships during secondary succession after the abandonment of farmlands for 0,10,20,30,40 and 50 a in China,2016.Results showed that the composition of plant communities was most diverse in the farmlands after secondary succession for 20 and 50 a.Soil organic carbon and total nitrogen contents slightly decreased after secondary succession for 30 a,but both were significantly higher than those of control farmland(31.21%-139.10%and 24.24%-121.21%,respectively).Moreover,C:N ratios of soil and microbe greatly contributed to the changes in plant community composition during secondary succession of abandoned farmlands,explaining 35.70%of the total variation.Particularly,soil C:N ratio was significantly and positively related with the Shannon-Wiener index.This study provides the evidence of synchronous evolution between plant community and soil during secondary succession and C:N ratio is an important linkage between them. | LIU Weichao FU Shuyue YAN Shengji REN Chengjie WU Shaojun DENG Jian LI Boyong HAN Xinhui YANG Gaihe | 2020 | Journal of Arid Land2020，12，2： | 5 |
| 20 | Numerical simulation and analysis of confined turbulent buoyant jet with variable source显示文摘In this work, experimental and numerical investigations are undertaken for confined buoyant turbulent jet with varying inlet temperatures. Results of the experimental work and numerical simulations for the problem under consideration are presented. Four cases of different variable inlet temperatures and different flow rates are considered. The realizable k-ε turbulence model is used to model the turbulent flow. Comparisons show good agreements between simulated and measured results. The average deviation of the simulated temperature by realizable k-ε turbulent model and the measured temperature is within 2%. The results indicate that temperatures along the vertical axis vary, generally, in nonlinear fashion as opposed to the approximately linear variation that was observed for the constant inlet temperature that was done in a previous work. Furthermore, thermal stratification exits, particularly closer to the entrance region. Further away from the entrance region the variation in temperatures becomes relatively smaller. The stratification is observed since the start of the experiment and continues during the whole course. Numerical experiments for constant, monotone increasing and monotone decreasing of inlet temperature are done to show its effect on the buoyancy force in terms of Richardson number. | EL-AMIN Mohamed F. AL-GHAMDI Abdulmajeed SALAMA Amgad SUN Shuyu | 2015 | Journal of Hydrodynamics2015，27，6： | 4 |
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