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50篇 您的检索式:作者名="Wenfu Chen"
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1Past,present,and future of biochar显示文摘After entering the twenty-first century,biochar has become a focal point of multidisciplinary research because of its special characteristics,broad application,and promising development prospects.Basic and applied research on the application of biochar in the areas of agriculture,environment,and energy have increased dramatically in the face of food security,environmental pollution,and energy shortage.Although there are some disputes about biochar research,many studies have demonstrated the importance of biochar research from the perspective of scientific advancement and practical application.This paper briefly recalls the history of biochar application;introduces research progress on the basic characteristics of biochar and its associated production technologies;summarizes the research status and existing problems of biochar application in the areas of agriculture,environment,and energy;and analyzes the potential problems and development trends of biochar research in the future.Wenfu Chen Jun Meng Xiaori Han Yu Lan Weiming Zhang 2019Biochar2019,1,1:66
2A scientometric review of biochar research in the past 20 years(1998-2018)显示文摘Biochar is the carbon-rich product obtained from the thermochemical conversion of biomass under oxygen-limited conditions.Biochar has attained extensive attention due to its agronomical and environmental benefits in agro-ecosystems.This work adopts the scientometric analysis method to assess the development trends of biochar research based on the literature data retrieved from the Web of Science over the period of 1998-2018.By analysing the basic characteristics of 6934 publications,we found that the number of publications grew rapidly since 2010.Based on a keyword analysis,it is concluded that scholars have had a fundamental recognition of biochar and preliminarily found that biochar application had agronomic and environmental benefits during the period of 1998-2010.The clustering results of keywords in documents published during 2011-2015 showed that the main research hotspots were“biochar production”,“biochar and global climate change”,“soil quality and plant growth”,“organic pollutants removal”,and“heavy metals immobilization”.While in 2016-2018,beside these five main research hotspots,“biochar and composting”topic had also received greater attention,indicating that biochar utilization in organic solid waste composting is the current research hotspot.Moreover,updated reactors(e.g.,microwave reactor,fixed-bed reactor,screw-feeding reactor,bubbling fluidized bed reactor,etc.)or technologies(e.g.,solar pyrolysis,Thermo-Catalytic Reforming process,liquefaction technology,etc.)applied for efficient energy production and modified biochar for environmental remediation have been extensively studied recently.The findings may help the new researchers to seize the research frontier in the biochar field.Ping Wu Syed Tahir Ata-Ul-Karim Bhupinder Pal Singh Hailong Wang Tongliang Wu Cun Liu Guodong Fang Dongmei Zhou Yujun Wang Wenfu Chen 2019Biochar2019,1,1:36
3Visualizing the emerging trends of biochar research and applications in 2019:a scientometric analysis and review显示文摘Biochar,derived from thermal pyrolysis of biomass,has been regarded as a low-cost,sustainable and beneficial material and widely applied in agriculture,environment and energy during the last two decades.To elucidate the research status timely and future trends in biochar field,CiteSpace is used to systematically analyze the related literature retrieved from the Web of Science core collection in 2019.Based on the keywords clustering analysis,it was found that“biochar production”,“organic pollutants removal”,“heavy metals immobilization”,“bioremediation”were the main hotspots in research covering biochar.“Bioremediation”is an emerging topic and deserves extensive attention due to its highly effective and environmentally friendly treatment of pollutants.Improving the phytoremediation effect,immobilizing functional microorganisms on biochar,and using microorganisms as raw materials to produce biochar were the common methods of biochar-assisted bioremediation.While studies focused on“soil quality and plant growth”and“biochar and global climate change”decreased,investigations concentrated in the toxicity of biochar to soil biota and ruminants are sustainably growing.Research on direct and catalytic thermal pyrolysis of green waste(mainly microalgae)for biofuels(bio-oil,biodiesel,syngas,etc.)and biochar production is increasing.Converting municipal wastes(e.g.,sewage sludge,fallen leaves)into biochar through pyrolysis was a suitable treatment for municipal waste and became a popular topic in recent time.Moreover,the biochar produced from these municipal wastes exhibited excellent performance in the removal of pollutants from wastewater and soil.This review may help to identify future directions in biochar research and applications.Ping Wu Zeyu Wang Hailong Wang Nanthi S.Bolan Yujun Wang Wenfu Chen 2020Biochar2020,2,2:14
4Generation of coexisting high-energy pulses in a mode-locked all-fiber laser with a nonlinear multimodal interference technique显示文摘We demonstrate a passively mode-locked all-fiber laser incorporating a piece of graded-index multimode fiber as a mode-locking modulator based on a nonlinear multimodal interference technique, which generates two types of coexisting high-energy ultrashort pulses [i.e., the conventional soliton(CS) and the stretched pulse(SP)]. The CS with pulse energy as high as 0.38 n J is obtained at the pump level of 130 mW. When the pump increases to175 mW, the high-energy SP occurs at a suitable nonlinear phase bias and its pulse energy can reach 4 n J at a 610 mW pump. The pulse durations of the generated CS and SP are 2.3 ps and 387 fs, respectively. The theory of nonlinear fiber optics, single-shot spectral measurement by the dispersive Fourier-transform technique, and simulation methods based on the Ginzburg–Landau equation are provided to characterize the laser physics and reveal the underlying principles of the generated CS and SP. A rogue wave, observed between the CS and SP regions, mirrors the laser physics behind the dynamics of generating a high-energy SP from a CS. The proposed all-fiber laser is versatile, cost-effective and easy to integrate, which provides a promising solution for high-energy pulse generation.GUANGWEI CHEN WENLEI LI GUOMEI WANG WENFU ZHANG CHAO ZENG WEI ZHAO 2019Photonics Research2019,7,2:9
5Development of the straw biochar returning concept in China显示文摘Biochar produced from straw has been shown to improve soil physicochemical properties.This review introduces the fundamental concepts,the broad applications,and underlying theory of straw biochar returning.Current developments in biochar industry and the production practices prevalent among enterprises in China are critiques.This review analyzes current knowledge gaps,challenges,and opportunities in the industrial application of straw biochar returning.Biochar standards,the quantitative and qualitative analysis methods for biochar,and high-value-added products that are based on biochar are critically examined with goal of providing recommendations for future studies.We propose production and modification of biochar that is application oriented to enhance its fitness for purpose as well as long-term and large-space-scale field study to better understand its impact on soil properties and ecotoxicology.Finally,we make prospects for the future development of SBR,including constructing a standard system about straw biochar returning and promoting self-discipline of biochar industry and the establishment of a biochar-based agricultural production model.Jun Meng Tianyi He Edmond Sanganyado Yu Lan Weiming Zhang Xiaori Han Wenfu Chen 2019Biochar2019,1,2:9
6Population Genomic Analysis and De Novo Assembly Reveal the Origin of Weedy Rice as an Evolutionary Game显示文摘Crop weediness,especially that of weedy rice(Oryza sativa f.spontanea),remains mysterious.Weedy rice possesses robust ecological adaptability;however,how this strain originated and gradually formed proprietary genetic features remains unclear?Here,we demonstrate that weedy rice at Asian high latitudes(WRAH)is phylogenetically well defined and possesses unselected genomic characteristics in many divergence regions between weedy and cultivated rice.We also identified novel quantitative trait loci underlying weedy-specific traits,and revealed that a genome block on the end of chromosome 1 is associated with rice weediness.To identify the genomic modifications underlying weedy rice evolution,we generated the first de novo assembly of a high-quality weedy rice genome(WR04-6),and conducted a comparative genomics study between WR04-6 with other rice reference genomes.Multiple lines of evidence,including the results of demographic scenario comparisons,suggest that differentiation between weedy rice and cultivated rice was initiated by genetic improvement of cultivated rice and that the essence of weediness arose through semi-domestication.A plant height model further implied that the origin of WRAH can be modeled as an evolutionary game and indicated that strategy-based selection driven by fitness shaped its genomic diversity.Jian Sun Dianrong Ma Liang Tang Minghui Zhao Guangchen Zhangh Wenjia Wang Jiayu Song Xiang Li Zimeng Liu Wenxing Zhang Quan Xu Yuncheng Zhou Jianzhong Wu Toshio Yamamoto Fei Dai Yan Lei Song Li Gang Zhou Hongkun Zheng Zhengjin Xu Wenfu Chen 2019Molecular Plant2019,12,5:9
7Long-distance ranging with high precision using a soliton microcomb显示文摘Laser-based light detection and ranging(lidar)plays a significant role in both scientific and industrial areas.However,it is difficult for existing lidars to achieve high speed,high precision,and long distance simultaneously.Here,we demonstrate a high-performance lidar based on a chip-scaled soliton microcomb(SMC)that can realize all three specialties simultaneously.Aided by the excellent properties of ultrahigh repetition rate and the smooth envelope of the SMC,traditional optical frequency comb(OFC)-based dispersive interferometry is heavily improved and the measuring dead zone induced by the mismatch between the repetition rate of the OFC and resolution of the optical spectrum analyzer is totally eliminated.Combined with an auxiliary dual-frequency phase-modulated laser range finder,the none-dead-zone measurable range ambiguity is extended up to 1500 m.The proposed SMC lidar is experimentally implemented in both indoor and outdoor environment.In the outdoor baseline field,real-time,high-speed(up to 35 k Hz)measurement of a long distance of^1179 m is achieved with a minimum Allan deviation of 5.6μm at an average time of 0.2 ms(27 nm at an average time of 1.8 s after high-pass filtering).The present SMC lidar approaches a compact,fast,high-precision,and none-dead zone long-distance ranging system,aimed at emerging applications of frontier basic scientific research and advances in industrial manufacturing.JINDONG WANG ZHIZHOU LU WEIQIANG WANG FUMIN ZHANG JIAWEI CHEN YANG WANG JIHUI ZHENG SAI T.CHU WEI ZHAO BRENT E.LITTLE XINGHUA QU WENFU ZHANG 2020Photonics Research2020,8,12:8
8Design principles and parameters of rice ideal panicle type显示文摘On the basis of many years of research at the laboratory, and by making reference to the related literature published at home and abroad, in this paper the concept of rice ideal panicle type was introduced, and the principles of rice ideal panicle type design were elucidated. The parame-ters of rice ideal panicle type for Liaoning were preliminarily established as follows: Panicle length <17 cm, neck-panicle curvature <40°, neck panicle length 3―4 cm, neck diameter >2 mm, large vascular bundle and primary branch >15 pieces/panicle, primary branch grain >80 grains/panicle, secondary branch grains concentrating in the middle and upper parts of panicle axis, and panicle type index >0.5. In addition, the possibility of achieving unity of grain yield and quality at a still higher level by creating an ideal panicle type was explored.XU Zhengjin CHEN Wenfu ZHANG Longbu YANG Shouren 2005Chinese Science Bulletin2005,50,19:6
9Pantograph-catenary electrical contact system of high-speed railways:recent progress,challenges,and outlooks显示文摘As the unique power entrance,the pantograph-catenary electrical contact system maintains the efficiency and reliability of power transmission for the high-speed train.Along with the fast development of high-speed railways all over the world,some commercialized lines are built for covering the remote places under harsh environment,especially in China;these environmental elements including wind,sand,rain,thunder,ice and snow need to be considered during the design of the pantograph-catenary system.The pantograph-catenary system includes the pantograph,the contact wire and the interface—pantograph slide.As the key component,this pantograph slide plays a critical role in reliable power transmission under dynamic condition.The fundamental material characteristics of the pantograph slide and contact wire such as electrical conductivity,impact resistance,wear resistance,etc.,directly determine the sliding electrical contact performance of the pantograph-catenary system;meanwhile,different detection methods of the pantograph-catenary system are crucial for the reliability of service and maintenance.In addition,the challenges brought from extreme operational conditions are discussed,taking the Sichuan-Tibet Railway currently under construction as a special example with the high-altitude climate.The outlook for developing the ultra-high-speed train equipped with the novel pantograph-catenary system which can address the harsher operational environment is also involved.This paper has provided a comprehensive review of the high-speed railway pantograph-catenary systems,including its progress,challenges,outlooks in the history and future.Guangning Wu Keliang Dong Zhilei Xu Song Xiao Wenfu Wei Huan Chen Jie Li Zhanglin Huang Jingwei Li Guoqiang Gao Guozheng Kang Chuanjun Tu Xingyi Huang 2022Railway Engineering Science2022,30,4:5
10A Light Space Manipulator with High Load-to-Weight Ratio: System Development and Compliance Control显示文摘In order to meet the requirements of the space environment for the lightweight and load capacity of the manipulator,this paper designs a lightweight space manipulator with a weight of 9.23 kg and a load of 2 kg.It adopts the EtherCAT communication protocol and has the characteristics of high load-to-weight ratio.In order to achieve constant force tracking under the condition of unknown environmental parameters,an integral adaptive admittance control method is proposed.The control law is expressed as a third-order linear system equation,the operating environment is equivalent to a spring model,and the control error transfer function is derived.The control performance under the step response is further analyzed.The simulation results show that the proposed integral adaptive admittance control method has better performance than the traditional method.It has no steady-state error,overcomes the problems caused by nonlinear discrete compensation,and can facilitate analysis in the frequency domain,realize parameter optimization,and improve calculation accuracy.Zhiwei Wu Yongting Chen Wenfu Xu 2021Space(Science & Technology)2021,,1:3
11Effect of Rice Breeding Process on Improvement of Yield and Quality in China显示文摘Rice,Oryza sativa,is a major global food staple,90%of which is cultivated in Asian countries.Its two major subspecies are japonica and indica,differing in geographical distribution and morphological characteristics(Wang W S et al,2018).The indica subspecies occupies 90%of the rice cultivation area,as opposed to only 10%occupied by the japonica subspecies,which is mainly distributed in northern China,Japan and Korea(Xu and Chen,2016).China is the only country in which japonica and indica are of equal importance.Two-thirds of the rice grown in China is indica,which is cultivated mostly in low-altitude and low-latitude regions,and one-third is japonica,farmed prevalently in high-altitude and high-latitude regions(Wang Y H et al,2018).After the introduction of semi-dwarf gene sdl,the ideal plant architecture breeding and the application of the Fi hybrid,accompanied by the improvement of cultivation methods and field management。Fei Cheng Xu Quan Xu Zhengjin Chen Wenfu 2020Rice science2020,27,5:3
12iTRAQ-Based Proteomics Investigation of Critical Response Proteins in Embryo and Coleoptile During Rice Anaerobic Germination显示文摘Direct-seeding of rice has become popular in recent years due to its low cost and convenience,however,hypoxic condition limits seedling establishment.In this study,weedy rice WR04-6 with high germination ability under anaerobic conditions was used as a gene donor,and we successfully improved the seedling establishment rate of rice cultivar Qishanzhan(QSZ)based on selection of a new rice line R42 from the recombinant inbred line population.R42 inherited high anaerobic germination(AG)ability,and was used for isobaric tags for relative and absolute quantitation(iTRAQ)-based comparative proteomic studies with QSZ to further explore the molecular mechanism of AG.A total of 719 differentially abundant proteins(DAPs)were shared by R42 and QSZ responded to AG,and thus defined as common response DAPs.A total of 300 DAPs that responded to AG were only identified from R42,which were defined as tolerance-specific DAPs.The common response and tolerance-specific DAPs had similar biochemical reaction processes and metabolic pathways in response to anoxic stress,however,they involved different proteins.The tolerance-specific DAPs were involved in amino acid metabolism,starch and sucrose metabolism,tricarboxylic acid cycle pathway,ethylene synthesis pathway,cell wall-associated proteins and activity of active oxygen scavenging enzyme.The in silico protein-protein interactions for the top 60 DAPs indicated that tolerance-specific DAPs had relatively independent protein interaction networks in response to an anoxic environment compared with common response DAPs.The results of physiological indicators showed thatα-amylase and superoxide dismutase activities of R42 were significantly increased under anoxic conditions compared with aerobic conditions.Multiple lines of evidence from western blot,physiological analysis and quantitatDirect seeding of rice has become popular in recent years due to its low cost and convenience,however,hypoxic conditions can limit seedling establishment.In the present study,weedy rice WR04-6 with high germination ability in anaerobic conditions was used as the gene donor and successfully improved the seedling establishment rate of rice cultivar Qishanzhan(QSZ)based on selection of a new rice line R42 from the recombinant inbred line(RIL)population.R42 inherited the had high anaerobic germination(AG)ability,which was used for the isobaric tags for relative and absolute quantitation(iTRAQ)based comparative proteomic studies with QSZ to further explore the molecular mechanism of AG.A total of 719 differentially abundant proteins(DAPs)shared by R42 and QSZ responded to AG and were thus defined as common response DAPs.A total of 300 DAPs that responded to AG were only identified from R42,which were defined as tolerance-specific DAPs.The common response and tolerance-specific DAPs had similar biochemical reaction processes and metabolic pathways in response to anoxic stress,however they involved different proteins.The 300 tolerance-specific DAPs were involved in amino acid metabolism,starch and sucrose metabolism,TCA cycle pathways,ethylene synthesis pathway,cell wall-associated proteins and activity of active oxygen scavenging enzyme.The in silico protein-protein interactions for the top 60 DAPs indicated that tolerance-specific DAPs had relatively independent protein interaction networks in response to an anoxic environment compared with common response DAPs.The results of physiological indicators showed thatα-amylase and SOD activities of R42 were significantly increased under anoxic conditions compared with aerobic conditions.Multiple lines of evidence from western blot,physiological analyses and real-time PCR jointly supported the reliability of proteomics data.In summary,our findings deepened the understanding of the molecular mechanism for the rice response to AG.ive real-time PCR jointly supported the reliability of proteomics data.In summary,our findings deepened the understanding of the molecular mechanism for the rice response to AG.Zhang Guangchen Liu Zimeng Liu Yoxihong Kuya Noriyuki HuAYuchen Shi Hongru Zhao Weilin Han Yuqing Yamamoto Toshio Chen Wenfu Sun Jian 2021Rice science2021,28,4:2
13A critical review of biochar-based nitrogen fertilizers and their effects on crop production and the environment显示文摘Globally,nitrogen(N)fertilizer demand is expected to reach 112 million tonnes to support food production for about 8 billion people.However,more than half of the N fertilizer is lost to the environment with impacts on air,water and soil quality,and biodiversity.Importantly,N loss to the environment contributes to greenhouse gas emissions and climate change.Nevertheless,where N fertilizer application is limited,severe depletion of soil fertility has become a major constraint to sustainable agriculture.To address the issues of low fertilizer N use efficiency(NUE),biochar-based N fertilizers(BBNFs)have been developed to reduce off-site loss and maximize crop N uptake.These products are generally made through physical mixing of biochar and N fertilizer or via coating chemical N fertilizers such as prilled urea with biochar.This review aims to describe the manufacturing processes of BBNFs,and to critically assess the effects of the products on soil properties,crop yield and N loss pathways.Yurong Gao Zheng Fang Lukas Van Zwieten Nanthi Bolan Da Dong Bert F.Quin Jun Meng Fangbai Li Fengchang Wu Hailong Wang Wenfu Chen 2022Biochar2022,4,1:2
14Inaugural editorial:pioneering the innovation and exploring the future for biochar technology显示文摘Sustainable development is the common and eternal theme of human society.With the rapid development of modern industry,agriculture and service,the ancient carbon balance has been broken.The carbon that was originally stored underneath the earth,represented by fossil energy and organic substances,has been released in large quantities,resulting in a series of ecological and environmental problems such as increased greenhouse gases,soil degradation,and declined quality of the cultivated land.All these factors contribute to the general tone of the global climate change,which possess impacts on the already fragile food security,energy resources,and the safety of environment and ecology.Wenfu Chen 2019Biochar2019,1,1:2
15Recovery of a Far-Eastern Strain of Tick-Borne Encephalitis Virus with a Full-Length Infectious cDNA Clone显示文摘Tick-borne encephalitis virus(TBEV) is a pathogenic virus known to cause central nervous system(CNS) diseases in humans, and has become an increasing public health threat nowadays. The rates of TBEV infection in the endemic countries are increasing. However, there is no effective antiviral against the disease. This underscores the urgent need for tools to study the emergence and pathogenesis of TBEV and to accelerate the development of vaccines and antivirals. In this study, we reported an infectious c DNA clone of TBEV that was isolated in China(the WH2012 strain). A beta-globin intron was inserted in the coding region of nonstructural protein 1(NS1) gene to improve the stability of viral genome in bacteria. In mammalian cells, the inserted intron was excised and spliced precisely, which did not lead to the generation of inserted mutants. High titers of infectious progeny viruses were generated after the transfection of the infectious clone. The cDNA-derived TBEV replicated efficiently, and caused typical cytopathic effect(CPE) and plaques in BHK-21 cells. In addition, the CPE and growth curve of cDNA-derived virus were similar to that of its parental isolate in cells. Together, we have constructed the first infectious TBEV cDNA clone in China, and the clone can be used to investigate the genetic determinants of TBEV virulence and disease pathogenesis, and to develop countermeasures against the virus.Penghui Li Chen Yao Ting Wang Tong Wu Wenfu Yi Yue Zheng Yuanjiu Miao Jianhong Sun Zhongyuan Tan Yan Liu Xiaowei Zhang Hanzhong Wang Zhenhua Zheng 2021Virologica Sinica2021,36,6:2
16The construction of drug-resistant cancer cell lines by CRISPR/Cas9 system for drug screening显示文摘Cancer therapy is often hampered by the rapid emergence of drug resistance. Drug-resistant cellular models are essential for understanding the drug resistance and developing new therapeutics. The low efficiency and long time required in creating these models are major obstacles hindering drug resistance research and drug screening. Herein, we report an approach that can accelerate(shortening the time from years to 3 weeks) the establishment of cancer cell line-based, inheritable drug resistance models by specific knockout of MED12 gene using CRISPR/Cas9 system. The resultant MED12^(KO) A375(melanoma)cell line was resistant to inhibitors of B-Raf proto-oncogene, serine/threonine kinase(BRAF), whereas the resultant MED12^(KO) PC9(non-small cell lung cancer) cell line was resistant to inhibitors of epidermal growth factor receptor(EGFR). Evaluation of anti-cancer drugs and their combinations shows that certain combinations of BRAF inhibitors and TGF-β receptor(TGF-βR) inhibitors are active in suppressing the growth of MED12^(KO) A375 cells, and a few combinations of EGFR inhibitors and TGF-βR inhibitors were active in suppressing the growth of MED12^(KO) PC9 cells. The drug-resistant models will be useful in screening novel drugs and drug combinations for multi-drug-resistant cancer therapy.Lingmin Zhang Ying Li Qinghua Chen Yong Xia Wenfu Zheng Xingyu Jiang 2018Science Bulletin2018,63,21:2
17Active facet determination of layered double hydroxide for oxygen evolution reaction显示文摘Oxygen evolution reaction(OER) plays an indispensable role in developing renewable clean energy resources. One of the critical bottlenecks for the reaction is the development of highly efficient electrocatalyst to decrease the high overpotentials of four-electron transfer process of OER. Recently, layered double hydroxides(LDHs) have been widely investigated among the most promising electrocatalysts for OER due to their high intrinsic activity, excellent stability as well as low-cost. However, it remains unclear how the exposed facet of the LDHs affects their electrocatalytic activity. Here we elucidate the active edge facet of LDHs towards OER by combining the finely control of edge facet ratio coupled with molecular probe method and computational calculation. The LDHs with higher edge facet area ratio show superior activity with low onset potential as well as decreased Tafel slope. The active edge site is further proved by blocking the unsaturated edge sites with cyanate probe anion, of which the adsorption largely inhibits OER activity. Furthermore, based on density functional theory(DFT) calculation, twodimensional map of theoretical overpotentials as a function of Gibbs free energy reveals that the edge(100) facet exhibits a much higher OER activity than basal plane(001) facet.Yunqi Zhang Wenfu Xie Jialing Ma Lifang Chen Chunyuan Chen Xin Zhang Mingfei Shao 2021Journal of Energy Chemistry2021,30,9:2
18Preparation and comparison of supported gold nanocatalysts on anatase, brookite, rutile, and P25 polymorphs of TiO2 for catalytic oxidation of CO 显示文摘Yan Wenfu Chen Bei Mahurin S M Schwartz V Mullins D R Lupini R Andrew Pennycook S J Dai Sheng Overbury S H 2005Journal of Physical Chemistry B2005,109,10:1
19Studies on preparation and swelling properties of the N-isopropylacrylami de/chitosan semi-IPN and IPN hydrogels显示文摘Wenfu Lee Yingjou Chen 2001Journal of Applied Polymer Science2001,82,:1
20Effect of intercalated reactive mica on water absorbency for poly(sodium acrylate) composite superabsorbents显示文摘Lee Wenfu Chen Yungchu 2005Eur Polym J2005,41,7:1
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