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40篇 您的检索式:作者名="Fan Yuqing"
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1Effects of Plant Growth-Promoting Rhizobacteria and N Source on Plant Growth and N and P Uptake by Tomato Grown on Calcareous Soils显示文摘Introducing specific microorganisms into the soil ecological system is an important strategy for improving nutrient use efficiency.Two pot experiments were conducted in the greenhouse from December 3, 2012 to January 25, 2013(Experiment 1) and March 11 to April 23, 2013(Experiment 2) to evaluate the effect of nitrogen(N) source and inoculation with plant growth-promoting rhizobacteria(PGPR) on plant growth and N and phosphorus(P) uptake in tomato(Lycopersicon esculentum Mill.) grown on calcareous soils from South Florida, USA.Treatments included urea, controlled release urea(a controlled release fertilizer, CRF) each at low and high N rates and with or without inoculation of PGPR.A mixture of PGPR strains Bacillus amyloliquefaciens IN937 a and Bacillus pumilus T4 was applied to the soil during growing periods of tomato.Treatments with PGPR inoculation increased plant height compared to treatments without PGPR in both experiments.Inoculation with PGPR increased shoot dry weight and shoot N uptake for the same N rate and N source.In both experiments, only at high N rate, CRF and urea treatments with PGPR had significantly(P < 0.05)greater shoot biomass than those without PGPR.Only at high N rate, CRF treatment with PGPR significantly increased shoot N uptake by 39.0% and 10.3% compared to that without PGPR in Experiments 1 and 2, respectively.Meanwhile, presence of PGPR in the soil increased shoot P uptake for all treatments in Experiment 1 and for most treatments in Experiment 2.In Experiment 1, only at low N rate, CRF treatment with PGPR significantly increased shoot P uptake compared with that without PGPR.In Experiment2, a significant increase in shoot P uptake by inoculation of PGPR was only observed in CRF treatment at high N rate.Results from this study indicate that inoculation with PGPR may increase plant growth and N and P uptake by tomato grown on calcareous soils.However, the effect of PGPR varied and was influenced by many factors such as N source, N rate, and soil fertility.Further investigations are warranted to confirm the effect of PGPR under different soil conditions.Xiaohui FAN Shouan ZHANG Xiaodan MO Yuncong LI Yuqing FU Zhiguang LIU 2017Pedosphere2017,27,6:8
2Photoinduced large polaron transport and dynamics in organic-inorganic hybrid lead halide perovskite with terahertz probes显示文摘Organic-inorganic hybrid metal halide perovskites(MHPs)have attracted tremendous attention for optoelectronic applications.The long photocarrier lifetime and moderate carrier mobility have been proposed as results of the large polaron formation in MHPs.However,it is challenging to measure the effective mass and carrier scattering parameters of the photogenerated large polarons in the ultrafast carrier recombination dynamics.Here,we show,in a one-step spectroscopic method,that the optical-pump and terahertz-electromagnetic probe(OPTP)technique allows us to access the nature of interplay of photoexcited unbound charge carriers and optical phonons in polycrystalline CH_(3)NH_(3)PbI_(3)(MAPbI_(3))of about 10μm grain size.Firstly,we demonstrate a direct spectral evidence of the large polarons in polycrystalline MAPbI_(3).Using the Drude-Smith-Lorentz model along with the Frӧhlich-type electron-phonon(e-ph)coupling,we determine the effective mass and scattering parameters of photogenerated polaronic carriers.We discover that the resulting moderate polaronic carrier mobility is mainly influenced by the enhanced carrier scattering,rather than the polaron mass enhancement.While,the formation of large polarons in MAPbI_(3)polycrystalline grains results in a long charge carrier lifetime at room temperature.Our results provide crucial information about the photo-physics of MAPbI3 and are indispensable for optoelectronic device development with better performance.Zuanming Jin Yan Peng Yuqing Fang Zhijiang Ye Zhiyuan Fan Zhilin Liu Xichang Bao Heng Gao Wei Ren Jing Wu Guohong Ma Qianli Chen Chao Zhang Alexey VBalakin Alexander PShkurinov Yiming Zhu Songlin Zhuang 2022Light(Science & Applications)2022,11,8:4
3Benthic Habitat Quality Assessment Based on Biological Indices in Xiaoqing River Estuary and Its Adjacent Sea of Laizhou Bay,China显示文摘Based on the macrofauna data(2008-2011) in Xiaoqing River estuary and its adjacent sea, Laizhou Bay of Bohai Sea, China, the AZTI Marine Biotic Index(AMBI) and Multivariate AMBI(M-AMBI) were used for benthic habitat quality(BHQ) assessment. Results showed that BHQ presented an obvious trend of improvement along the direction of stream channel and river mouth, and in the coastal areas. AMBI and M-AMBI were significantly related to environmental pressure gradient data. Therefore, the two indices can well indicate BHQ in the studied area. However, there were significant differences between results of the two indices. In the cases of low taxa number and high abundance of single species, AMBI might overestimate BHQ. We thus adjusted its thresholds to solve this problem. And M-AMBI might overestimate BHQ when benthic assemblage was dominated by the opportunistic species. Then we could raise the weight of AMBI in the calculation of M-AMBI to handle the problem.LUO Xianxiang LIN Song YANG Jianqiang SHEN Jiayu FAN Yuqing ZHANG Longjun 2017Journal of Ocean University of China2017,16,3:3
4Relationships between Artemisia ordosica communities and environmental factors following sand-dune stabilization in the Mu Us desert,northwest China显示文摘Artemisia ordosica is an excellent sand-fixing shrub for sand stabilization in northwestern China. Sand dune stabilization, a critically important process, leads changes in abiotic factors, such as soil structure and nutrient contents. However, the effects of factors on an A.ordosica community following sand stabilization remain unclear. In this study, we used canonical correspondence analysis(CCA) to examine the relationships between A.ordosica communities and environmental factors at three habitats: semi-fixed dune(SF), fixed dune with low-coverage biological soil crust(F), and fixed dune with highcoverage biological soil crust(FC) in Mu Us desert. The mean height and coverage of plants increased with sand stabilization, while species diversity and richness increased initially and then reduced significantly. Correlation analysis and CCA revealed that slope, soil organic carbon, and nutrient contents, proportion of fine soil particles, soil moisture, and thickness of biological soil crust were allhighly correlated with vegetation characteristics. These environmental factors could explain 40.42 % of the vegetation–environment relationships at the three habitats. The distribution of plant species was positively related to soil moisture in the SF dune. Soil moisture, soil nutrient, and fine-particle contents mainly affected plants distribution in the F dune. In the FC dune, distribution of plant species was positively and negatively correlated with the thickness of biological soil crust and soil moisture at a depth0–20 cm, respectively. The dominance value of typical steppe species increased significantly following sand-dune stabilization and relations between species and samples in CCA ordination bi-plots showed that perennial grasses could invade the A. ordosica community on FC, indicating A. ordosica communities had a tendency to change into typical steppe vegetation with the further fixation. We conclude that the significant differentiation not only occurred in community characteristics, but also in the relationships between vegetation and environmental factors among the three stages of dune fixation. So, restoration of degraded dune ecosystems should be based on habitat conditions and ecological needs.Dongqing Fan Yuqing Zhang Shugao Qin Bin Wu 2017Journal of Forestry Research2017,28,1:3
5Predictive value of MGMT promoter methylation on the survival of TMZ treated IDH-mutant glioblastoma显示文摘Objective:O6 methylguanine-DNA methyltransferase(MGMT)promoter methylation is a biomarker widely used to predict the sensitivity of IDH-wildtype glioblastoma to temozolomide therapy.Given that the IDH status has critical effects on the survival and epigenetic features of glioblastoma,we aimed to assess the role of MGMT promoter methylation in IDH-mutant glioblastoma.Methods:This study included 187 IDH-mutant glioblastomas and used 173 IDH-wildtype glioblastomas for comparison.KaplanMeier curves and multivariate Cox regression were used to study the predictive effects.Results:Compared with IDH-wildtype glioblastomas,IDH-mutant glioblastomas showed significantly higher(P<0.0001)MGMT promoter methylation.We demonstrated that MGMT promoter methylation status,as determined by a high cutoff value(≥30%)in pyrosequencing,could be used to significantly stratify the survival of 50 IDH-mutant glioblastomas receiving temozolomide therapy(cohort A);this result was validated in another cohort of 25 IDH-mutant glioblastomas(cohort B).The median progression-free survival and median overall survival in cohort A were 9.33 and 13.76 months for unmethylated cases,and 18.37 and 41.61 months for methylated cases,and in cohort B were 6.97 and 9.10 months for unmethylated cases,and 23.40 and 26.40 months for methylated cases.In addition,we confirmed that the MGMT promoter methylation was significantly(P=0.0001)correlated with longer OS in IDH-mutant patients with GBM,independently of age,gender distribution,tumor type(primary or recurrent/secondary),and the extent of resection.Conclusions:MGMT promoter methylation has predictive value in IDH-mutant glioblastoma,but its cutoff value should be higher than that for IDH-wildtype glioblastoma.Ruichao Chai Guanzhang Li Yuqing Liu Kenan Zhang Zheng Zhao Fan Wu Yuzhou Chang Bo Pang Jingjun Li Yangfang Li Tao Jiang Yongzhi Wang 2021Cancer Biology & Medicine2021,18,1:2
6Efficacy,safety and immunogenicity of hexavalent rotavirus vaccine in Chinese infants显示文摘A randomized,double-blind,placebo-controlled multicenter trial was conducted in healthy Chinese infants to assess the efficacy and safety of a hexavalent live human-bovine reassortant rotavirus vaccine(HRV)against rotavirus gastroenteritis(RVGE).A total of 6400 participants aged 6-12 weeks were enrolled and randomly assigned to either HRV(n?3200)or placebo(n?3200)group.All the subjects received three oral doses of vaccine four weeks apart.The vaccine efficacy(VE)against RVGE caused by rotavirus serotypes contained in HRV was evaluated from 14 days after three doses of administration up until the end of the second rotavirus season.VE against severe RVGE,VE against RVGE hospitalization caused by serotypes contained in HRV,and VE against RVGE,severe RVGE,and RVGE hospitalization caused by natural infection of any serotype of rotavirus were also investigated.All adverse events(AEs)were collected for 30 days after each dose.Serious AEs(SAEs)and intussusception cases were collected during the entire study.Our data showed that VE against RVGE caused by serotypes contained in HRV was 69.21%(95%CI:53.31-79.69).VE against severe RVGE and RVGE hospitalization caused by serotypes contained in HRV were 91.36%(95%CI:78.45-96.53)and 89.21%(95%CI:64.51-96.72)respectively.VE against RVGE,severe RVGE,and RVGE hospitalization caused by natural infection of any serotype of rotavirus were 62.88%(95%CI:49.11-72.92),85.51%(95%CI:72.74-92.30)and 83.68%(95%CI:61.34-93.11).Incidences of AEs from the first dose to one month post the third dose in HRV and placebo groups were comparable.There was no significant difference in incidences of SAEs in HRV and placebo groups.This study shows that this hexavalent reassortant rotavirus vaccine is an effective,well-tolerated,and safe vaccine for Chinese infants.Zhiwei Wu Qingliang Li Yan Liu Huakun Lv Zhaojun Mo Fangjun Li Qingchuan Yu Fei Jin Wei Chen Yong Zhang Teng Huang Xiaosong Hu Wei Xia Jiamei Gao Haisong Zhou Xuan Bai Yueyue Liu Zhenzhen Liang Zhijun Jiang Yingping Chen Jiuwei Zhang Jialiang Du Biao Yang Bo Xing Yantao Xing Ben Dong Qinghai Yang Chen Shi Tingdong Yan Bo Ruan Haiyun Shi Xingliang Fan Dongyang Feng Weigang Lv Dong Zhang Xiangchu Kong Liuyifan Zhou Dinghong Que Hong Chen Zhongbing Chen Xiang Guo Weiwei Zhou Cong Wu Qingrong Zhou Yuqing Liu Jian Qiao Ying Wang Xinguo Li Kai Duan Yuliang Zhao Gelin Xu Xiaoming Yang 2022Virologica Sinica2022,37,5:2
7Functional response of Neoseiulus barkeri Hughes on two-spotted spider mite (Acari: Tetranychidae)显示文摘Yuqing Fan Frederick L. Petitt 1994EXPERIMENTAL AND APPLIED ACAROLOGY1994,,10:2
8Assessing benthic habitat quality using biotic indices in the Laizhou Bay, China显示文摘As an important part of the Bohai economic rim,the Laizhou Bay has been stressed by serious eco-environmental problems in recent years.In this study,the Shannon-Wiener index(H′),AZTI’s marine biotic index(AMBI)and the multivariate AMBI(M-AMBI)were used to assess the ecological quality status(EQS)of the Laizhou Bay according to macrobenthos data collected annually in August 2011–2014.The results showed that the overall benthic habitat quality in the Laizhou Bay was assessed as“Good”.However,25%of the samples were classified as“Moderate”,“Bad”or“Poor”status under degraded conditions.Ecological group III(EGIII)species which had a certain tolerance to environmental disturbances had a higher proportion in each station,and most of them had appeared the pollution indicator species Capitella capitata.This indicated that the benthic habitat in the Laizhou Bay had been disturbed and polluted to some extent.The comparison of the three indices evaluation result and the RDA analysis showed that the H′and M-AMBI were more suitable when the relative abundance of the single species was high and the macrobenthic community was significantly imbalanced;when the relative abundance of opportunistic species(EGIV and EGV)was high,the AMBI and M-AMBI could reflected the EQS objectively;in an undisturbed and polluted environment,all the three indices could indicate the benthic habitats quality.In summary,the better correlation between the three indices and environmental factors showed that they were well responsive to the tendency of the benthic habitats quality in the Laizhou Bay.Li Wang Xianxiang Luo Jianqiang Yang Juan Zhang Yuqing Fan Jiayu Shen 2020Acta Oceanologica Sinica2020,39,2:2
9Research for Major-parts Digital Assembly System of Large-scale Airplane 显示文摘Zou Jihua Riaz A Fan Yuqing 2007Wseas Transactions on Systems2007,6,2:1
10Changes in the pharmacokinetics of glibenclamide in rats with streptozotocin-induced diabetes mellitus显示文摘The aim of this study was to investigate the pharmacokinetics of glibenclamide(Gli)administrated orally and intravenously to normal and diabetic rats.The AUC(0–720 min)of orally administered Gli in diabetic rats(321.24 mg min/L)was greater than that(57.752 mg min/L)in normal rats.CL(0.019 L/min/kg)was significantly slower than that(0.092 L/min/kg)of normal rats.The AUC(0–480min)of intravenous Gli in diabetic rats(1528.280 mg min/L)also was significantly greater than that(509.523 mg min/L)in normal rats,and CL was decreased approximately 3-fold.No significant difference in intestinal absorption of Gli was observed between normal and diabetic rats as determined by in situ single-pass intestinal perfusion.The clearance of Diclofenac(a substrate of CYP2C9)was determined to evaluate changes in hepatic drug-metabolizing enzyme activity in rats.The CL in diabetic rats was significantly lower(42.43%decrease)than that in normal rats.Hepatic protein expression of CYP2C9 was measured using Western blot analysis;compared with normal rats,the hepatic protein expression of CYP2A9 was decreased in diabetic rats.Therefore,the slower clearance of Gli in diabetic rats can be attributed primarily to the lower expression of hepatic CYP2C9.Yuqing Li Yuhui Wei Fan Zhang Dan Wang Xinan Wu 2012Acta Pharmaceutica Sinica B2012,2,2:1
11miR-199-5p regulates spermiogenesis at the posttranscriptional level via targeting Tekt1 in allotriploid crucian carp显示文摘Background:Sperm abnormalities are one of the primary factors leading to male sterility,but their pathogenesis is still unclear.Although miRNAs are suggested to exert important roles in the regulation of spermatogenesis at both transcriptional and posttranscriptional levels,little is currently known regarding the regulation of sperm flagella assembly by microRNAs(miRNAs).The role of miRNAs in the development of sperm abnormalities in sterile triploid fish has not been studied.Results:In this study,we found that miR-199-5p was widely expressed in all detected tissues of different-ploidy crucian carp.As one of the testis-specific candidate markers,Tekt1 was predominantly expressed in the testis.Quantitative real-time PCR(qRT-PCR)analyses showed that the expression trend of miR-199-5p was exactly opposite to that of Tekt1.Through bioinformatics analysis,we identified a putative miR-199-5p binding site in the Tekt1 mRNA.We further identified Tekt1 as a target of miR-199-5p using luciferase reporter assay.Finally,we confirmed that miR-199-5p was necessary for sperm flagellar assembly and spermatogenesis in vivo via intraperitoneal injection of miR-199-5p antagomir or agomir in diploid red crucian carp.Moreover,miR-199-5p gainof-function could lead to spermatids apoptosis and abnormal spermatozoa structure,which is similar to that of allotriploid crucian carp.Conclusions:Our studies suggested that abnormally elevated miR-199-5p inhibited the sperm flagella formation in spermiogenesis by negatively regulating the expression of Tekt1,thereby causing sperm abnormalities of male allotriploid crucian carp.Shengnan Li Qiubei Wang Lu Huang Siyu Fan Ting Li Yuqing Shu Chun Zhang Yi Zhou Qingfeng Liu Kaikun Luo Min Tao Shaojun Liu 2022Journal of Animal Science and Biotechnology2022,13,5:1
12Product Data Management Based on Web Technology显示文摘Chu XINGjun Fan Yuqing 1999Integrated Manufacturing Systems1999,10,2:1
13Structure and morphology of polypropylene poly (ethylene-co-propylene) in situ blends synthesized by spherical Ziegler-Natta catalyst显示文摘Fu Zhisheng Fan Zhiqiang Zhang Yuqing 2003European Polymer Journal2003,39,4:1
14A Modified Paving Approach and Automatic Mesh Grading Method to Quadrilateral Mesh Generation显示文摘A modified paving technique for automatic generation of all-quadrilateral mesh fromarbitrary 2-D geometry is presented. The generated mesh elementS are nearly square andperpendicular to boundaries. Aner the nodes and elementS formation is completed. a fully automaticgrading method is applied to increase the accuracy and reliability of engineering analysis. In thispaper, we mainly describe the theory of mathematical algorithm and present some examples ofautomatically generated mesh.Mei Zhongyi Fan Yuqing Hu Shiguang(School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics, Beijing 100083, P.R.China) 1999Computer Aided Drafting,Design and Manufacturing1999,9,1:1
15Influence factors and resolution about straw power generation in China显示文摘Fu Youhong Fan Fengming Fu Yuqing 2007Journal of Shenyang Institute of Engineering (Natural Science)2007,3,3:1
16Structure and morphology of polypropylene/ poly(ethylene-co-propylene) in situ blends synthesized by sphericaI Ziegler-Natta catalyst显示文摘Zhisheng Fu Zhiqing Fan Yuqing Zhang 2003European polymer journal2003,,39:1
17Investigation on Fracture Properties of Single-Flawed Tunnel Model Under Medium-to-Low-Speed Impacts显示文摘Dynamic fractures occur frequently in geophysical processes and engineering applications.It is thus essential to study crack and failure behaviors,such as crack time-to-initiation,crack growth rate and arrest period under dynamic loading.In this study,impact experiments were implemented by utilizing the single-flawed tunnel specimens under drop-hammer impacts.Four brittle materials,i.e.,green sandstone,red sandstone,black sandstone and polymethyl methacrylate,were selected to make single-flawed tunnel specimens.Strain gauges and crack extension gauges were employed to measure the crack extension parameters.The properties of crack growth rate,crack time-to-initiation and arrest period of these four brittle materials were discussed and analyzed.The corresponding numerical simulation was performed by using the commercial software AUTODYN.The numerical results of crack growth rate and crack time-to-initiation agreed with the impact test results.The commercial software ABAQUS was applied to compute the dynamic stress intensity factors.The results show that both the dynamic initiation fracture toughness and the crack growth rate increase with the elastic moduli of these four types of brittle materials under the same loading conditions,whereas the crack time-to-initiation decreases with the increase in elastic moduli of the brittle materials under the same loading conditions.Lei Zhou Zheming Zhu Ruifeng Liu Yong Fan Yuqing Dong Peng Ying 2020Acta Mechanica Solida Sinica2020,33,2:1
18Surgical treatment of primary palmar hyperhidrosis: a prospective randomized study comparing T3 and T4 sympathicotomy显示文摘Yanguo Liu Jie Yang Jun Liu Fan Yang Guanchao Jiang Jianfeng Li Yuqing Huang Jun Wang 2009European Journal of Cardio-Thoracic Surgery2009,,3:1
19Mild hyperthermia synergized chemotherapy by Bi_(2)Se_(3)/MoSe_(2)nanosaucers for cancer treatment with negligible thermal resistance显示文摘Harsh photothermal temperatures(>50℃)caused heating damage to the normal tissues and induced thermal resistance in cancer cells,which significantly limited the safety and efficacy of photothermal therapy(PTT)in cancer treatment.Mild hyperthermia(<42℃)combined with chemotherapy might solve this issue.Herein,a novel transition metal dichalcogenides nanostructure,namely,Bi_(2)Se_(3)/MoSe_(2)nanosaucers(BMNSs),was designed to produce mild photo-hyperthermia(mPTT)and combined with chemotherapy to improve the overall antitumor efficacy.The BMNSs were constituted by Bi_(2)Se_(3)hexagonal nanoplates and enclosed with MoSe_(2)nanosheets evenly.While the MoSe_(2)moiety endowed the nanoplatform with excellent photothermal efficacy,the Bi_(2)Se_(3)substrates provided large specific surface area to anchor more doxorubicin(DOX)molecules as chemotherapeutic agent.Under the stimuli of mPTT/tumor acidic microenvironment,the tumor-specific drug release and the enhanced chemotherapy could be realized,showing impressive therapeutic outcomes against 4T1 cells.The synergetic therapeutic mechanism might be attributed to the mPTT induced cell membrane permeability,and interestingly,the expression of heat shock proteins 70 was not elevated obviously after the synergetic therapy,thus to avoid the tumor thermal resistance and further improve the therapeutic effect.The in vivo anti-tumoral performance of the BMNSs was further studied and complete tumor eradication was achieved without any recurrence and biotoxicity.Not only demonstrating a paradigm of high therapeutic efficacy of mild hyperthermia and synergistic chemotherapy for precise cancer therapy,our findings proved that the cancer therapeutic effect can be improved with minimal side effects through exquisite designing of the microstructures and the physiochemical properties of the nanoplatform.Fei Gao Tingbin Zhang Yuqing Miao Huijun Ma Hui Guo Ruyi Jin Zhi Li Haifang Wang Haiming Fan Lingyun Zhao 2022Nano Research2022,15,9:1
20Structure and Morphology of Polypropylene/Poly(ethylene-copropylene) In-situ Blends Synthesized by Spherical ZieglerNatta Catalyst显示文摘Zhisheng Fu Zhiqing Fan Yuqing Zhang 2003European Polymer Journal2003,39,4:1
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