维普中文期刊产品整合服务
14篇 您的检索式:作者名="Fangfang Qu"
    题名 作者 年代 出处 被引量
1Practical performance and its efficiency of arsenic removal from groundwater using Fe-Mn binary oxide显示文摘A treatment unit packed by granular adsorbent of Fe-Mn binary oxide incorporated into diatomite (FMBO(1:1)-diatomite) was studied to remove arsenic from anaerobic groundwater without any pre-treatment or post-treatment. The raw anaerobic groundwater containing 35-45 μg/L of arsenic was collected from suburb of Beijing. Arsenic(III) constituted roughly 60%-80% of the total arsenic content. Approximately 7,000 bed volumes (ratio of efluent volume to adsorbent volume) treated water with arsenic concentration below 10 μg/L were produced in the operation period of four months. The regeneration of FMBO(1:1)-diatomite had been operated for 15 times. In the first stage, the regeneration process significantly improved the adsorption capacity of FMBO(1:1)-diatomite. With increased loading amount of Fe-Mn binary oxide, the adsorption capacity for arsenic decreased 20%-40%. Iron and manganese in anaerobic groundwater were oxidized and adsorptive filtrated by FMBO(1:1)-diatomite efficiently. The final concentrations of iron and manganese in efluents were nearly zero. The continued safe performance of the treatment units proved that adsorbent FMBO(1:1)-diatomite had high oxidation ability and exhibited strong adsorptive filtration.Fangfang Chang Jiuhui Qu Ruiping Liu Xu Zhao Pengju Lei 2010Journal of Environmental Sciences2010,22,1:11
2Fe–Mn binary oxide incorporated into diatomite as an adsorbent for arsenite removal: Preparation and evaluation显示文摘Fangfang Chang Jiuhui Qu Huijuan Liu Ruiping Liu Xu Zhao 2009Journal of Colloid And Interface Science2009,,2:1
3HIV and HCV Infection Status Among Drug Users--China, 2010−2018显示文摘What is already known about this topic?It is known that drug users(DUs)was brought into human immunodeficiency virus(HIV)sentinel surveillance as HIV related high-risk group since 1990s with a higher HIV antibody positive rate in the early stage.What is added by this report?This study not only showed that HIV antibody positive rate had decreased steadily since 2010 and maintained stable in past 4 years,but also showed that the proportion of the new narcotic and the mixed drug users increased since 2010 and HIV antibody positive rate of mixed abuse users increased year by year.What are the implications for public health practice?Some existing policies and strategies publicity,education and interventions require adjustments since new narcotic drug users contributed to DUs HIV infections.The challenge of HIV infection and transmission among drug users abusing both traditional and new narcotic drugs also require more attention.Lin Ge Dongmin Li Peilong Li Shuquan Qu Fangfang Chen Fan Lyu 2020China CDC weekly2020,2,7:1
4Two Supporting Factors Greatly Improve the Efficiency of Human iPSC Generation显示文摘Yang Zhao Xiaolei Yin Han Qin Fangfang Zhu Haisong Liu Weifeng Yang Qiang Zhang Chengang Xiang Pingping Hou Zhihua Song Yanxia Liu Jun Yong Pengbo Zhang Jun Cai Meng Liu Honggang Li Yanqin Li Xiuxia Qu Kai Cui Weiqi Zhang Tingting Xiang Yetao Wu Yiding Zh 2008Cell Stem Cell2008,,5:1
5Generation of Induced Pluripotent Stem Cells from Adult Rhesus Monkey Fibroblasts显示文摘Haisong Liu Fangfang Zhu Jun Yong Pengbo Zhang Pingping Hou Honggang Li Wei Jiang Jun Cai Meng Liu Kai Cui Xiuxia Qu Tingting Xiang Danyu Lu Xiaochun Chi Ge Gao Weizhi Ji Mingxiao Ding Hongkui Deng 2008Cell Stem Cell2008,,6:1
6Generation of Induced Pluripotent Stem Cells from Adult Rhesus Monkey Fibroblasts显示文摘Haisong Liu Fangfang Zhu Jun Yong Pengbo Zhang Pingping Hou Honggang Li Wei Jiang Jun Cai Meng Liu Kai Cui Xiuxia Qu Tingting Xiang Danyu Lu Xiaochun Chi Ge Gao Weizhi Ji Mingxiao Ding Hongkui Deng 2008Cell Stem Cell2008,,6:1
7A gradient descent boosting spectrum modeling method based on back interval partial least squares显示文摘REN Dong QU Fangfang LYU Ke 2015Neurocomputing2015,162,:1
8Review of theoretical methods and research aspects for detecting leaf water content using terahertz spectroscopy and imaging显示文摘The water content in vegetative leaves is an important indicator to plant science.It reveals the physiological status of plants and provides valuable information in irrigation management.Terahertz(THz)as a state-of-the-art technology shows great potential in measuring and monitoring the water status in plant leaves.This paper reviewed the theoretical models for calculating water content in the plant leaves,the methods for eliminating the scattering loss caused by the surface roughness of leaf,the applications of THz spectroscopy and THz imaging for monitoring leaf water content and describing leaf water distribution.The survey of the researches presents the considerable advantages of this emerging and promising THz technology in agriculture.Fangfang Qu Pengcheng Nie Lei Lin Chengyong Cai Yong He 2018International Journal of Agricultural and Biological Engineering2018,11,5:1
9Migration of manganese and iron during the adsorptionregeneration cycles for arsenic removal显示文摘Fe-Mn binary oxide incorporated into porous diatomite(FMBO-diatomite)was prepared in situ and regenerated in a fixed-bed column for arsenite[As(III)]and arsenate[As(V)]removal.Four consecutive adsorption cycles were operated under the following conditions:Initial arsenic concentration of 0.1 mg·L^(-1),empty bed contact time of 5 min,and pH 7.0.About 3000,3300,3800,and 4500 bed volumes of eligible effluent(arsenic concentration≤0.01 mg·L^(-1))were obtained in four As(III)adsorption cycles;while about 2000,2300,2500,and 3100 bed volumes of eligible effluent were obtained in four As(V)adsorption cycles.The dissection results of FMBOdiatomite fixed-bed exhibited that small amounts of manganese and iron were transferred from the top of the fixed-bed to the bottom of the fixed-bed during As(III)removal process.Compared to the extremely low concentration of iron(<0.01 mg·L^(-1)),the fluctuation concentration of Mn2+in effluent of the As(III)removal column was in a range of 0.01-0.08 mg·L^(-1).The release of manganese suggested that manganese oxides played an important role in As(III)oxidation.Determined with the US EPA toxicity characteristic leaching procedure(TCLP),the leaching risk of As(III)on exhausted FMBO-diatomite was lower than that of As(V).Fangfang CHANG Jiuhui QU Xu ZHAO Wenjun LIU Kun WU 2011Frontiers of Environmental Science & Engineering2011,5,4:1
10Identification of broad neutralizing antibodies against Omicron subvariants from COVID-19 convalescents and vaccine recipients显示文摘Dear Editor,Omicron(B.1.1.529)was designated a variant of concern(VOC)on November 26,2021(Callaway,2021),and its subvariants BA.1,BA.2,and BA.3 emerged and circulated almost simultaneously(Desingu et al.,2022).BA.2 was more efficient in transmission and quickly overtook BA.1 to become the variant most frequently detected worldwide(Yamasoba et al.,2022a).Compared to the prototype SARS-CoV-2 spike protein(S),the BA.1 and BA.2 spike proteins harbor more than 30 mutations,of which 21 are identical between the two subvariants,while the BA.3 spike differs from BA.1 and BA.2 by 3 mutations in the receptor binding domain(RBD)(Fig.1A).More recently,BA.4 and BA.5(hereafter BA.4/5)emerged,sharing the same spike sequence and containing four additional mutations,Del69–70,L452R,F486V,and R493Q,compared with BA.2.BA.4/5 were detected first in South Africa and evolved independently of BA.2;they have spread widely and replaced BA.2 as the predominant VOC(Gruell et al.,2022b;Tegally et al.,2022).In addition,BA.2.75,derived from the BA.2 subvariant,harbors nine additional mutations in the spike protein compared with BA.2(Fig.1A).BA.4/5 and BA.2.75 have led to the continuous emergence of novel Omicron subvariants,including BF.7 and BQ.1.These new subvariants may be driving waves of pandemics.Jun Chen Jing Yang Fangfang Chang Yabin Hu Qian Wu Shishan Teng Yongchen Liu Jian Zhang Rongzhang He Bo Liu Xingyu Zheng Ze Liu Yanxi Peng Zhenhua Xie Yuanfang Zhang Rui Lu Dong Pan You Wang Liting Peng Wenpei Liu Yi-Ping Li Xiaowang Qu 2023Virologica Sinica2023,38,2:0
11SARS-CoV-2 spike-specific TFH cells exhibit unique responses in infected and vaccinated individuals显示文摘Long-term humoral immunity to SARS-CoV-2 is essential for preventing reinfection. The production of neutralizing antibody (nAb)and B cell differentiation are tightly regulated by T follicular help (T_(FH)) cells. However, the longevity and functional role of T_(FH) cellsubsets in COVID-19 convalescents and vaccine recipients remain poorly defined. Here, we show that SARS-CoV-2 infection andinactivated vaccine elicited both spike-specific CXCR3^(+) T_(FH) cell and CXCR3^(-) T_(FH) cell responses, which showed distinct responsepatterns. Spike- specific CXCR3^(+) T_(FH) cells exhibit a dominant and more durable response than CXCR3^(-) T_(FH) cells that positivelycorrelated with antibody responses. A third booster dose preferentially expands the spike-specific CXCR3^(+) T_(FH) cell subset inducedby two doses of inactivated vaccine, contributing to antibody maturation and potency. Functionally, spike-specific CXCR3^(+) T_(FH) cellshave a greater ability to induce spike-specific antibody secreting cells (ASCs) differentiation compared to spike-specific CXCR3^(-) T_(FH)cells. In conclusion, the persistent and functional role of spike-specific CXCR3^(+) T_(FH) cells following SARS-CoV-2 infection andvaccination may play an important role in antibody maintenance and recall response, thereby conferring long-term protection. Thefindings from this study will inform the development of SARS-CoV-2 vaccines aiming to induce long-term protective immunememory.Rongzhang He Xingyu Zheng Jian Zhang Bo Liu Qijie Wang Qian Wu Ziyan Liur Fangfang Chang Yabin Hu Ting Xie Yongchen Liu Jun Chen Jing Yang Shishan Teng Rui Lu Dong Pan You Wang Liting Peng Weijin Huang Velislava Terzieva Wenpei Liu Youchun Wang Yi-Ping Li Xiaowang Qu 2023Signal Transduction and Targeted Therapy2023,8,11:0
12Distributed Model Predictive Contouring Control for Real-Time Multi-Robot Motion Planning显示文摘Existing motion planning algorithms for multi-robot systems must be improved to address poor coordination and increase low real-time performance.This paper proposes a new distributed real-time motion planning method for a multi-robot system using Model Predictive Contouring Control(MPCC).MPCC allows separating the tracking accuracy and productivity,to improve productivity better than the traditional Model Predictive Control(MPC)which follows a time-dependent reference.In the proposed distributed MPCC,each robot exchanges the predicted paths of the other robots and generates the collision-free motion in a parallel manner.The proposed distributed MPCC method is tested in industrial operation scenarios in the robot simulation platform Gazebo.The simulation results show that the proposed distributed MPCC method realizes real-time multi-robot motion planning and performs better than three commonly-used planning methods(dynamic window approach,MPC,and prioritized planning).Jianbin Xin Yaoguang Qu Fangfang Zhang Rudy Negenborn 2022Complex System Modeling and Simulation2022,2,4:0
13Impact of COVID-19 pandemic on the pregnancy outcomes of women undergoing assisted reproductive techniques(ARTs):a systematic review and meta-analysis显示文摘The global outbreak of the coronavirus disease 2019(COVID-19) led to the suspension of most treatments with assisted reproductive technique(ART). However, with the recent successful control of the pandemic in China, there is an urgent public need to resume full reproductive care. To determine whether the COVID-19 pandemic had any adverse effects on female fertility and the pregnancy outcomes of women undergoing ART, a systematic review and meta-analysis was conducted using the electronic Chinese and English databases. Dichotomous outcomes were summarized as prevalence, and odds ratios(ORs)and continuous outcomes as standardized mean difference(SMD) with 95% confidence interval(CI). The risk of bias and subgroup analyses were assessed using Stata/SE 15.1 and R 4.1.2. The results showed that compared with women treated by ART in the pre-COVID-19 time frame, women undergoing ART after the COVID-19 pandemic exhibited no significant difference in the clinical pregnancy rate(OR 1.07, 95% CI 0.97 to 1.19;I^(2)=0.0%), miscarriage rate(OR 0.95, 95% CI 0.79 to1.14;I^(2)=38.4%), embryo cryopreservation rate(OR 2.90, 95% CI 0.17 to 48.13;I^(2)=85.4%), and oocyte cryopreservation rate(OR 0.30, 95% CI 0.03 to 3.65;I^(2)=81.6%). This review provided additional evidence for gynecologists to guide the management of women undergoing ART treatment during the COVID-19 pandemic timeframe.Weihuan HU Yuhang ZHU Yan WU Fangfang WANG Fan QU 2022Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2022,23,8:0
14Diastereoselective 2,3-diazidation of indoles via copper(Ⅱ)-catalyzed dearomatization显示文摘The copper-catalyzed directed dearomatization of indoles with the assistance of directing groups has been developed for the synthesis of 2,3-diazido indolines with good yields and excellent diastereoselectivities in aqueous solution.The resultant 2,3-diazides can be smoothly converted to other functional groups,including vicinal diamines,triazoles and benzotriazoles,in a single step.Jiang Liu Zhongjin Fang Xin Liu Yandong Dou Jianze Jiang Fangfang Zhang Jiaojiao Qu Qing Zhu 2020Chinese Chemical Letters2020,31,5:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费