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16篇 您的检索式:作者名="Wan Junfeng"
    题名 作者 年代 出处 被引量
1Effect of fertilization patterns on the assemblage of weed communities in an upland winter wheat field显示文摘Aims Understanding the response of farmland weed community assembly to fertilization is important for designing better nutrient management strategies in integrated farmland ecological systems.Many studies have focused on weed characteristics,mainly crop–weed competition responses to fertilization or weed communities alone.However,weed community assembly in association with crop growth is poorly understood in the agroecosystems,but is important for the determination of integrated weed management.Biodiversity promotes ecosystem productivity in the grassland,but whether it applies to the agroecosystems is unclear.Based on an 11-year field experiment,the cumulative effects of different fertilization patterns on the floristic composition and species diversity of farmland weed communities along with wheat growth in a winter wheat–soybean rotation were investigated.Methods The field trial included five fertilization patterns with different combinations of N,P and K fertilizers.Species composition and diversity of weed communities,aboveground plant biomass and nutrient accumulation of weeds and winter wheat,light penetration to the ground surface and wheat yield were measured at each plot in 2009 and 2010.Multivariate analysis,regression and analysis of variance were used to analyze the responses of these parameters to the different fertilization treatments.Important Findings Four dominant weeds(Galium aparine L.,Veronica persica Poir.,Vicia sativa L.and Geranium carolinianum L.)accounted for~90%of the total weed density in the 2 years of experimental duration.The residual weed community assembly was influenced primarily by topsoil available nutrients in the order P>N>K.Competition for nutrients and solar radiation between crops and weeds was the main indirect effect of fertilization on the changes in weed community composition and species diversity.The indices of species diversity(species richness,Shannon–Wiener,Pielou and Simpson indices)showed significant linear relationships with wheat yield.The balanced fertilization treatment was more efficient at inhibiting the potential growth of weeds because of solar radiation being intercepted by wheat.These results support the conclusion that wheat yield is favored by balanced fertilization,whereas the weed community is favored by PK fertilization in terms of density and diversity.However,the negative effects on wheat yield may be compromised by simultaneous positive effects of weed communities in the fertilization treatments,for instance,the NP and NK treatments,which are intermediate in terms of increasing wheat production and to a level maintaining a diverse community.Leilei Tang Kaiyuan Wan Chuanpeng Cheng Ruhai Li Daozhong Wang Junfeng Pan Yong Tao Juan Xie Fang Chen 2014Journal of Plant Ecology2014,7,1:6
2A temperature responsive adhesive hydrogel for fabrication of flexible electronic sensors显示文摘Flexible electronics are playing an increasingly important role in human health monitoring and healthcare diagnosis.Strong adhesion on human tissue would be ideal for reducing interface resistance and motion artifacts,but arising problems such as skin irritation,rubefaction,and pain upon device removal have hampered their utility.Here,inspired by the temperature reversibility of hydrogen bonding,a skin-friendly conductive hydrogel with multiple-hydrogen bonds was designed by using biocompatible poly(vinyl alcohol)(PVA),phytic acid(PA),and gelatin(Gel).The obtained PVA/PA/Gel(PPG)hydrogel with temperature-triggered tunable mechanic could reliably adhere to skin and detect electrophysiological signals under a hot compress while be readily removed under a cool compress.Furthermore,the additional advantages of transparency,breathability,and antimicrobial activity of the PPG hydrogel ensure its long-time wearable value on the skin.It is both environmentally friendly and cost saving for the waste PPG hydrogel during production can be recycled based on their reversible physical bonding.The PPG hydrogel sensor is expected to have good application prospects to record electrophysiological signals in human health monitoring.Wan Liu Ruijie Xie Jingyu Zhu Jiansheng Wu Junfeng Hui Xiaoyan Zheng Fengwei Huo Daidi Fan 2022npj Flexible Electronics2022,6,1:2
3Effective Surface Treatment for High‑Performance Inverted CsPbI2Br Perovskite Solar Cells with Efficiency of 15.92%显示文摘Developing high-efficiency and stable inverted CsPbI2Br perovskite solar cells is vitally urgent for their unique advantages of removing adverse dopants and compatible process with tandem cells in comparison with the regular.However,relatively low opening circuit voltage(Voc)and limited moisture stability have lagged their progress far from the regular.Here,we propose an effective surface treatment strategy with high-temperature FABr treatment to address these issues.The induced ions exchange can not only adjust energy level,but also gift effective passivation.Meanwhile,the gradient distribution of FA+can accelerate the carriers transport to further suppress bulk recombination.Besides,the Br-rich surface and FA+substitution can isolate moisture erosions.As a result,the optimized devices show champion efficiency of 15.92%with Voc of 1.223 V.In addition,the tolerance of humidity and operation get significant promotion:maintaining 91.7%efficiency after aged at RH 20%ambient condition for 1300 h and 81.8%via maximum power point tracking at 45°C for 500 h in N2.Furthermore,the unpackaged devices realize the rare reported air operational stability and,respectively,remain almost efficiency(98.9%)after operated under RH 35%for 600 min and 91.2%under RH 50%for 300 min.Sheng Fu Xiaodong Li Li Wan Wenxiao Zhang Weijie Song Junfeng Fang 2020Nano-Micro Letters2020,12,12:2
4Solution‑Processed Transparent Conducting Electrodes for Flexible Organic Solar Cells with 16.61% Efficiency显示文摘Nonfullerene organic solar cells(OSCs)have achieved breakthrough with pushing the efficiency exceeding 17%.While this shed light on OSC commercialization,high-performance flexible OSCs should be pursued through solution manufacturing.Herein,we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid(CF3SO3H).Through a low-concentration and low-temperature CF3SO3H doping,the conducting polymer anodes exhibited a main sheet resistance of 35Ωsq−1(minimum value:32Ωsq−1),a raised work function(≈5.0 eV),a superior wettability,and a high electrical stability.The high work function minimized the energy level mismatch among the anodes,hole-transporting layers and electron-donors of the active layers,thereby leading to an enhanced carrier extraction.The solution-processed flexible OSCs yielded a record-high efficiency of 16.41%(maximum value:16.61%).Besides,the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85°C,demonstrating a high flexibility and a good thermal stability.Juanyong Wan Yonggao Xia Junfeng Fang Zhiguo Zhang Bingang Xu Jinzhao Wang Ling Ai Weijie Song Kwun Nam Hui Xi Fan Yongfang Li 2021Nano-Micro Letters2021,13,3:2
5Neutralizing antibody response in the patients with hand, foot and mouth disease to enterovirus 71 and its clinical implications显示文摘Yang Chunfu Dang Chaoyang Wan Junfeng 2011Virol J2011,8,:1
6Negative regulation of gamma-aminobutyric acid type A receptor on free calcium ion levels following facial nerve injury显示文摘Previous studies have demonstrated that muscarinic,and nicotinic receptors increase free Ca2+ levels in the facial nerve nucleus via various channels following facial nerve injury.However,intracellular Ca2+ overload can trigger either necrotic or apoptotic cell death.Gamma-aminobutyric acid(GABA),an important inhibitory neurotransmitter in the central nervous system,exists in the facial nerve nucleus.It is assumed that GABA negatively regulates free Ca2+ levels in the facial nerve nucleus.The present study investigated GABA type A(GABAA) receptor expression in the facial nerve nucleus in a rat model of facial nerve injury using immunohistochemistry and laser confocal microscopy,as well as the regulatory effects of GABAA receptor on nicotinic receptor response following facial nerve injury.Subunits α1,α3,α5,β1,β2,δ,and γ3 of GABAA receptors were expressed in the facial nerve nucleus following facial nerve injury.In addition,GABAA receptor expression significantly inhibited the increase in nicotinic receptor-mediated free Ca2+ levels in the facial nerve nucleus following facial nerve injury in a concentration-dependent fashion.These results suggest that GABAA receptors exhibit negative effects on nicotinic receptor responses following facial nerve injury.Fugao Zhu Dawei Sun Yanqing Wang Rui Zhou Junfeng Wen Xiuming Wan Yanjun Wang Banghua Liu 2010Neural Regeneration Research2010,5,22:1
7Possible role of denitrification on aerobic granular sludge formation in sequencing batch reactor显示文摘Wan Junfeng Sperandio Mathieu 2009Chemosphere2009,75,2:1
8Recent advances in RNA structurome显示文摘RNA structures are essential to support RNA functions and regulation in various biological processes. Recently, a range of novel technologies have been developed to decode genome-wide RNA structures and novel modes of functionality across a wide range of species. In this review, we summarize key strategies for probing the RNA structurome and discuss the pros and cons of representative technologies. In particular, these new technologies have been applied to dissect the structural landscape of the SARS-CoV-2 RNA genome. We also summarize the functionalities of RNA structures discovered in different regulatory layers-including RNA processing, transport, localization, and mRNA translation-across viruses, bacteria, animals, and plants. We review many versatile RNA structural elements in the context of different physiological and pathological processes(e.g., cell differentiation, stress response, and viral replication). Finally, we discuss future prospects for RNA structural studies to map the RNA structurome at higher resolution and at the single-molecule and single-cell level, and to decipher novel modes of RNA structures and functions for innovative applications.Bingbing Xu Yanda Zhu Changchang Cao Hao Chen Qiongli Jin Guangnan Li Junfeng Ma Siwy Ling Yang Jieyu Zhao Jianghui Zhu Yiliang Ding Xianyang Fang Yongfeng Jin Chun Kit Kwok Aiming Ren Yue Wan Zhiye Wang Yuanchao Xue Huakun Zhang Qiangfeng Cliff Zhang Yu Zhou 2022Science China(Life Sciences)2022,65,7:1
9Breeding strategies for optimum heading date using genotypic information in rice显示文摘Xiangjin Wei Linglong Liu Junfeng Xu Ling Jiang Wenwei Zhang Jiankang Wang Huqu Zhai Jianmin Wan 2010Molecular Breeding2010,,2:1
10Breeding strategies for optimum heading date using genotypic information in rice显示文摘Xiangjin Wei Linglong Liu Junfeng Xu Ling Jiang Wenwei Zhang Jiankang Wang Huqu Zhai Jianmin Wan 2010Molecular Breeding2010,,2:1
11Cr(VI) adsorption onan improved synthesised cross-linked chitosan resin显示文摘Zhenjun Wu Shunyi Li Junfeng Wan 2012Journal ofMolecular Liquids2012,,170:1
12SNX16通过独特的膜结合和货物蛋白识别机制调节钙粘蛋白E-cadherin的循环转运显示文摘文章简介上皮细胞钙粘蛋白E-cadherin在胚胎发育、肿瘤发展和细胞编程中都发挥重要作用。然而,对于E-cadherin在细胞内的分选转运,尤其是E-cadherin被内吞后重新回到细胞表面的循环转运机制仍不清楚。Jinxin Xu Leilei Zhang Yinghua Ye Yongli Shan Chanjuan Wan Junfeng Wang Duanqing Pei 舒晓东 刘劲松 2018科学新闻2018,0,4:0
13The impact of China’s high-speed rail investment on regional economy and air pollution emissions显示文摘The high-speed rail(HSR)network in China has experienced rapid development since the 2000s.In 2016,the State Council of the People’s Republic of China issued a revised version of the“Mid-and Long-term Railway Network Plan”,detailing the expansion of the railway network and construction of an HSR system.In the future,the HSR construction efforts in China will further increase,which is considered to impact regional development and air pollutant emissions.Therefore,in this paper,we apply a transportation network-multiregional computable general equilibrium(CGE)model to estimate the dynamic effects of HSR projects on economic growth,regional disparities,and air pollutant emissions in China.The results indicate that HSR system improvement could generate a positive economic impact but could also increase emissions.The gross domestic product(GDP)growth per unit investment cost stimulated by HSR investment is found to be the largest in eastern China but the smallest in the northwest regions.Conversely,HSR investment in Northwest China contributes to a substantial reduction in regional disparities in terms of the GDP per capita.In regard to air pollution emissions,HSR construction in South-Central China results in the largest increase in CO_(2) and NO_(X) emissions,while for CO,SO_(2),and fine particulate matter(PM_(2.5))emissions,the largest increase occurs due to HSR construction in Northwest China.At the regional level,the provinces with large changes in accessibility also experience large changes in their air pollutant emissions.Qiong Yang Yuqing Wang Ying Liu Junfeng Liu Xiurong Hu Jianmin Ma Xuejun Wang Yi Wan Jianying Hu Zhaobin Zhang Xilong Wang Shu Tao 2023Journal of Environmental Sciences2023,,9:0
14Antimicrobial hydrogel with multiple pH-responsiveness for infected burn wound healing显示文摘Burns are a common medical problem globally,and wound infection is one of the major causes of inducing related complications.Although antibiotics effectively prevent wound infections,the misuse of antibiotics has created a new problem of superbugs.Herein,we propose a new strategy to obtain pH-responsive antimicrobial P-ZIF(ZIF:zeolitic imidazolate framework)by loading polyhexamethylenebiguanide(PHMB)into the framework of ZIF-8 nanoparticles.This will enable PHMB to be released in the weak acid environment of an infected wound.To address burn infections,P-ZIF nanoparticles were loaded into a hydrogel system made of sodium alginate(SA)and 3-aminophenylboronic acid modified human-like collagen(H-A)through borate ester bonds.The resulting H-A/SA/P-ZIF(HASPZ)hydrogel dressing not only possesses antibacterial and wound healing properties but also has dual pH responsiveness to prevent the overuse of medication while effectively treat deep second-degree burns.Therefore,P-ZIF nanoparticles and the corresponding HASPZ hydrogel dressing are considered of significant importance in antimicrobial,drug delivery,and wound repair.Na Li Wan Liu Xiaoyan Zheng Qing Wang Lixin Shen Junfeng Hui Daidi Fan 2023Nano Research2023,16,8:0
15Recent development of ionic liquid membranes显示文摘The interest in ionic liquids(IL) is motivated by its unique properties, such as negligible vapor pressure, thermal stability, wide electrochemical stability window, and tunability of properties. ILs have been highlighted as solvents for liquid-liquid extraction and liquid membrane separation. To further expand its application in separation field, the ionic liquid membranes(ILMs) and its separation technology have been proposed and developed rapidly. This paper is to give a comprehensive overview on the recent applications of ILMs for the separation of various compounds, including organic compounds, mixed gases, and metal ions. Firstly, ILMs was classified into supported ionic liquid membranes(SILMs) and quasi-solidified ionic liquid membranes(QSILMs) according to the immobilization method of ILs. Then, preparation methods of ILMs, membrane stability as well as applications of ILMs in the separation of various mixtures were reviewed. Followed this, transport mechanisms of gaseous mixtures and organic compounds were elucidated in order to better understand the separation process of ILMs. This tutorial review intends to not only offer an overview on the development of ILMs but also provide a guide for ILMs preparations and applications.Junfeng Wang Jianquan Luo Shicao Feng Haoran Li Yinhua Wan Xiangping Zhang 2016Green Energy & Environment2016,1,1:0
16Ce and Se co-doped MBG/SA/HLC microgel bone powder for repairing tumor bone defects显示文摘The repair and treatment of tumor bone defects is a difficult problem to solve urgently in clinical medicine.After tumor resection,patients are not only faced with a large area of bone defect,but also may have the risk of tumor recurrence,which can easily cause huge physical and mental harm to patients.In this study,we successfully designed and constructed an organic/inorganic composite microgel bone powder(S-H-M3%Ce/3%Se)based on cerium(Ce)and selenium(Se)elements co-doped mesoporous bioactive glass(M3%Ce/3%Se),sodium alginate(SA),and recombinant human-like collagen(HLC).The obtained S-H-M3%Ce/3%Se could inhibit the growth of osteoma cells and promote the growth of normal cells,and effectively promote the repair of defect bone.The integration of the“treatment and repair”organic/inorganic composite microgel bone powder provided a new strategy for the treatment of cancerous bone defects.Miaolin Fan Wan Liu Cuiying Fan Xiaoyan Zheng Junfeng Hui Chaoquan Hu Daidi Fan 2023Nano Research2023,16,1:0
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