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46篇 您的检索式:作者名="Fengjuan Zhang"
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1Recent advances and prospects toward blue perovskite materials and light-emitting diodes显示文摘Perovskite based light-emitting diodes(PeLEDs)have become a powerful candidate for next-generation solid-state lightings and high-definition displays due to their high photoluminescence quantum yield(PLQY),tunable emission wavelength over the visible spectrum,and narrow emission linewidths.Over the past few years,the development of red-and green-emissive PeLEDs has rapidly increased,and the corresponding external quantum efficiencies(EQE)have exceeded 20%.However,the research progress of blue-emitting PeLEDs is limited by its poor material quality and inappropriate device structure.Currently,the maximum EQE of blue PeLED is only 6.2%,which is far from the industrialization requirements.In order to promote the development of blue PeLEDs,we summarize the recent research progress of blue perovskite materials and LEDs and discuss several fatal challenges,mainly embodied in low efficiency and poor stability.In order to overcome these challenges,detailed analysis and strategies are put forward in terms of the materials and devices.For the former,we summarize the feasible strategy for the preparation of efficient and stable blue-emissive perovskites using component engineering.For the latter,we analyze the advantages and limitations of the different strategies for blue-emissive perovskite in LEDs.At the end of the review,a comprehensive outlook is detailed,including future development directions and several technical problems to be solved.Thus,we aim to highlight the significance and promote the industrialization of PeLEDs.Tao Fang Fengjuan Zhang Shichen Yuan Haibo Zeng Jizhong Song 2019InfoMat2019,1,2:9
2Perovskite light-emitting/detecting bifunctional fibres for wearable LiFi communication显示文摘Light fidelity(LiFi),which is emerging as a compelling technology paradigm shifting the common means of highcapacity wireless communication technologies,requires wearable and full-duplex compact design because of its great significance in smart wearables as well as the‘Internet of Things’.However,the construction of the key component of wearable full-duplex LiFi,light-emitting/detecting bifunctional fibres,is still challenging because of the conflicting process between carrier separation and recombination,as well as the highly dynamic film-forming process.Here,we demonstrate light-emitting/detecting bifunctional fibres enabled by perovskite QDs with hybrid components.The hybrid perovskite inks endow fibres with super-smooth QD films.This,combined with the small exciton binding energy and high carrier mobility of perovskite QDs,enables successful integration of electroluminescence and photodetection into monofilaments.The bifunctional fibres possess the narrowest electroluminescence full width at half maximum of ~19 nm and,more importantly,the capability for simultaneously transmitting and receiving information.The successful fabrication of narrow emission full-duplex LiFi fibres paves the way for the fabrication and integration of low crosstalk interoperable smart wearables.Qingsong Shan Changting Wei Yan Jiang Jizhong Song Yousheng Zou Leimeng Xu Tao Fang Tiantian Wang Yuhui Dong Jiaxin Liu Boning Han Fengjuan Zhang Jiawei Chen Yongjin Wang Haibo Zeng 2020Light(Science & Applications)2020,9,1:7
3The ultraviolet photoconductive detector based on Al-doped ZnO thin film with fast response显示文摘We report fabrication and characterization of metal-semiconductor-metal photoconductive detectors based on Al-doped ZnO thin films fabricated by radio frequency magnetron sputtering.Optical and structural properties of the thin films were characterized using various techniques.At 6 V bias,a responsivity higher than 4 A/W in the wavelength shorter than 350 nm was obtained,and this responsibility dropped quickly and reached the noise floor in the visible region.Transient response measurement revealed that the detector had a fast photoresponse with a rise time of 9 ns and a fall time of 1.2 μs.SUN Jian DAI Qian LIU FengJuan HUANG HaiQin LI ZhenJun ZHANG XiQing WANG YongSheng 2011Science China(Physics,Mechanics & Astronomy)2011,54,1:4
4RNA-seq analysis of unintended effects in transgenic wheat overexpressing the transcription factor GmDREB1显示文摘The engineering of plants with enhanced tolerance to abiotic stresses typically involves complex multigene networks and may therefore have a greater potential to introduce unintended effects than the genetic modification for simple monogenic traits. For this reason, it is essential to study the unintended effects in transgenic plants engineered for stress tolerance. We selected drought-and salt-tolerant transgenic wheat overexpressing the transcription factor, GmDREB1, to investigate unintended pleiotropic effects using RNA-seq analysis. We compared the transcriptome alteration of transgenic plants with that of wild-type plants subjected to salt stress as a control. We found that GmDREB1 overexpression had a minimal impact on gene expression under normal conditions.GmDREB1 overexpression resulted in transcriptional reprogramming of the salt response,but many of the genes with differential expression are known to mitigate salt stress and contribute incrementally to the enhanced stress tolerance of transgenic wheat. GmDREB1 overexpression did not activate unintended gene networks with respect to gene expression in the roots of transgenic wheat. This work is important for establishing a method of detecting unintended effects of genetic engineering and the safety of such traits with the development of marketable transgenic crops in the near future.Qiyan Jiang Fengjuan Niu Xianjun Sun Zheng Hu Xinhai Li Youzhi Ma Hui Zhang 2017The Crop Journal2017,5,3:3
5普通玉米、糯玉米和蒸汽压片玉米对生长猪能量和营养物质消化率的影响显示文摘研究的目的是通过饲喂生长猪普通玉米、糯玉米和蒸汽压片玉米来测定其消化能、代谢能和营养物质的表观消化率。朱秋凤 张永静 温春雨 徐作鹏 Dongli Ma Juntao Li Chengfei Huang Fengjuan Yang Yi Wu Ling Liu Wei Jiang Zhicheng Jia Peijun Zhang Xuezhen Liu Shuai Zhang 2021猪业科学2021,38,3:3
6Extraction Process Optimization and Moisturizing Performance of Fucoidan from Sargassum fusiforme显示文摘[Objectives] The research aimed to optimize extraction process of fucoidan from Sargassum fusiforme( FSF) and study its moisturizing performance. [Methods]Extracting condition of FSF by cellulase hydrolysis-ultrasonic assisted extraction method was optimized. The influences of solvent p H,enzyme dosage,extraction temperature,cellulose hydrolysis time,ultrasonication time,and the ratio of material to liquid on FSF were investigated by single factor and orthogonal experiments. [Results] The optimum extraction conditions were as followings:p H,4. 5; enzyme dosage,1%; extraction temperature,40℃; cellulose hydrolysis time,2 h; ultrasonic time,15 min; and the ratio of material to liquid,1∶ 10( g∶ m L). Under the optimal condition,the extraction yield of FSF was 8. 50%,RSD = 2. 74%. The short-time hygroscopicity( within 8 h) of crude extract of fucoidan from S. fusiforme( CEFSF) was better than glycerin,butanediol,and sodium alginate,and the moisture retention capacity of 1% CEFSF aqueous solution was better than 1% butanediol or 1% sodium alginate,and was equal to 5% glycerin under relative humidity of 43% and 81%. The determination results of skin moisture content and transepidermal water loss rate( TEWL)showed that: 5% CEFSF solution had good moisturizing effect. [Conclusions]The research could provide certain reference for deep development of S. fusiforme.Bingyue LIU Xue LIU Fengjuan WU Guangqun CAO Chen ZHANG Jie YANG 2018Medicinal Plant2018,9,3:3
7The PIWI-specific insertion module helps load longer piRNAs for translational activation essential for male fertility显示文摘PIWI-clade proteins harness pi RNAs of 24–33 nt in length.Of great puzzles are how PIWI-clade proteins incorporate pi RNAs of different sizes and whether the size matters to PIWI/pi RNA function.Here we report that a PIWI-Ins module unique in PIWIclade proteins helps define the length of pi RNAs.Deletion of PIWI-Ins in Miwi shifts MIWI to load with shorter pi RNAs and causes spermiogenic failure in mice,demonstrating the functional importance of this regulatory module.Mechanistically,we show that longer pi RNAs provide additional complementarity to target m RNAs,thereby enhancing the assembly of the MIWI/e IF3f/Hu R super-complex for translational activation.Importantly,we identify a c.1108C>T(p.R370W)mutation of HIWI(human PIWIL1)in infertile men and demonstrate in Miwi knock-in mice that this genetic mutation impairs male fertility by altering the property of PIWI-Ins in selecting longer pi RNAs.These findings reveal a critical role of PIWI-Ins-ensured longer pi RNAs in fine-tuning MIWI/pi RNA targeting capacity,proven essential for spermatid development and male fertility.Xin Wang Di-Hang Lin Yue Yan An-Hui Wang Jiaoyang Liao Qian Meng Wen-Qing Yang Heng Zuo Min-Min Hua Fengjuan Zhang Hongwen Zhu Hu Zhou Tian-Yu Huang Rui He Guangyong Li Yue-Qiu Tan Hui-Juan Shi Lan-Tao Gou Dangsheng Li Ligang Wu Yonggang Zheng Xiang-Dong Fu Jinsong Li Rujuan Liu Guo-Hui Li Mo-Fang Liu 2023Science China(Life Sciences)2023,66,7:2
8Metabolic profiling of DREB-overexpressing transgenic wheat seeds by liquid chromatographymass spectrometry显示文摘DREBs are transcription factors that regulate abiotic stress tolerance in plants.Previously,we reported that wheat transgenic lines overexpressing Gm DREB1 showed increased tolerance to drought and salt stress.However,the molecular basis of increased tolerance is still poorly understood,and whether the overexpression of DREB will cause unexpected effects is also of concern.We performed seed metabolic profiling of the genetically modified(GM)wheat T349 and three non-GM cultivars with LC-MS to identify the metabolic basis of stress tolerance and to assess the unexpected effects of exogenous gene insertion.Although we did not note the appearance of novel metabolites or the disappearance of existing metabolites,overexpression of the transcription factor Gm DREB1 in T349 wheat influenced metabolite levels in seeds.Increased levels of stress tolerance-associated metabolites were found in the stress-sensitive non-transgenic acceptor counterpart J19,while metabolites associated with cell membrane structure and stability accumulated in T349.Among these metabolites in T349,most showed levels similar to those in the non-GM wheats.Overexpression of Gm DREB1 in T349 may cause a shift in its metabolic profile leading to down-regulation of several energy-consuming processes to favor increased yield under stress conditions,which is a reasonable expectation of breeders while creating the GM wheat and Gm DREB1 overexpression did not cause unexpected effects in T349 seeds.These results may be helpful for GM crop research and risk assessment.Fengjuan Niu Qiyan Jiang Xianjun Sun Zheng Hu Lixia Wang Hui Zhang 2020The Crop Journal2020,8,6:2
9Hydrogen-assisted scalable preparation of ultrathin Pt shells onto surfactant-free and uniform Pd nanoparticles for highly efficient oxygen reduction reaction in practical fuel cells显示文摘Concentrating active Pt atoms in the outer layers of electrocatalysts is a very effective approach to greatly reduce the Pt loading without compromising the electrocatalytic performance and the total electrochemically active surface area(ECSA)for the oxygen reduction reaction(ORR)in hydrogen-based proton-exchange membrane fuel cells.Accordingly,a facile,low-cost,and hydrogen-assisted two-step method is developed in this work,to massively prepare carbon-supported uniform,small-sized,and surfactant-free Pd nanoparticles(NPs)with ultrathin~3-atomic-layer Pt shells(Pd@Pt_(3L) NPs/C).Comprehensive physicochemical characterizations,electrochemical analyses,fuel cell tests,and density functional theory calculations reveal that,benefiting from the ultrathin Pt-shell nanostructure as well as the resulting ligand and geometric effects,Pd@Pt_(3L) NPs/C exhibits not only significantly enhanced ECSA,electrocatalytic activity,and noble-metal(NM)utilization compared to commercial Pt/C,showing 81.24 m^(2)/gPt,0.710 mA/cm^(2),and 352/577 mA/mgNM/Pt in ECSA,area-,and NM-/Pt-mass-specific activity,respectively;but also a much better electrochemical stability during the 10,000-cycle accelerated degradation test.More importantly,the corresponding 25-cm^(2) H2-air/O_(2) fuel cell with the low cathodic Pt loading of~0.152 mgPt/cm^(2)geo achieves the high power density of 0.962/1.261 W/cm^(2)geo at the current density of only 1,600 mA/cm^(2)geo,which is much higher than that for the commercial Pt/C.This work not only develops a high-performance and practical Pt-based ORR electrocatalyst,but also provides a scalable preparation method for fabricating the ultrathin Pt-shell nanostructure,which can be further expanded to other metal shells for other energy-conversion applications.Liuxuan Luo Cehuang Fu Aiming Wu Zechao Zhuang Fengjuan Zhu Fangling Jiang Shuiyun Shen Xiyang Cai Qi Kang Zhifeng Zheng Chenyi Hu Jiewei Yin Guofeng Xia Junliang Zhang 2022Nano Research2022,15,3:2
10HB(N_5)_3M(M=Li,Na,K,and Rb):A new kind of pentazolides as HEDMs显示文摘HB(N5)3M(M=Li,Na,K,and Rb) have been investigated as potential high-energy density materials in the present paper by means of density functional theory.They all show kinetic stabilities as to the breakup of N5 ring.Their kinetic stabilities decrease in the order of Li,Na,K,and Rb.Compared to HB(N5)3K and HB(N5)3Rb,HB(N5)3Li and HB(N5)3Na have higher transition state barriers and are of significantly higher energy content,and thus they are suggested to be more practical and suitable as potential high-energy density materials.Jian Cui Yan Zhang Fengjuan Zhao Jing Yang Gangyi Shen Yu Xu 2009Progress in Natural Science:Materials International2009,19,1:2
11The Regulatory Roles of microRNAs and Associated Target Genes during Early Somatic Embryogenesis in Liriodendron Sino-Americanum显示文摘Somatic cells respond to considerable stress,and go through a series of phytohormone pathways,then forming an embryo.The developmental process is recorded as somatic embryogenesis(SE).One of the key components regulating SE are the microRNAs(miRNAs).Despite previous studies,it is still not clear exactly how miRNAs exert their function of regulating targets during conditionally activated early SE.Here,we use Liriodendron sino-americanum as a model system and perform a combined analysis of microfluidic chips and degradome sequencing to study this process.We identified a total of 386 conserved miRNAs and 153 novel miRNAs during early SE.According to the ANOVA test,239 miRNAs showed 12 distinct expression patterns.Through degradome sequencing,419 targets and 198 targets were identified for 136 known miRNAs and 37 novel miRNAs,respectively.Gene Ontology(GO)and metabolism pathway enrichment analysis revealed that these targets were significantly involved in oxidation-reduction processes,calmodulin-mediated signal transduction pathways and carbohydrate metabolism.The genes that were related to stress responses,phytohormone pathways and plant metabolism were identified within the targets of miR319,miR395,miR408,miR472,miR482,miR390,miR2055,miR156,miR157,miR171,miR396,miR397,miR529,miR535 and miR159.According to promoter analysis,various cis-acting elements related to plant growth and development,phytohormones response and stress response were present in the promoter of the miRNAs.The differential expression patterns of 11 miRNA-target modules were confirmed by real-time quantitative PCR.The study demonstrated that the miRNA plays an important role in the early SE process by regulating its target and then participating in carbohydrate metabolism and stress response.It also provided a valuable resource for further research in determining the genetic mechanism of SE,and then facilitating breeding programs on plants.Dan Wang Fengjuan Lu Pengkai Wang Jiaji Zhang Lu Lu Yan Zhen Ye Lu Tielong Cheng Jisen Shi Jinhui Chen 2021Phyton-International Journal of Experimental Botany2021,90,5:1
12Heritability of resistance-related gene expression traits and their correlation with body size of clam Meretrix petechialis显示文摘Gene expression variation can be considered as a phenotype,and it plays an important role in both acclimation and adaption.However,genetic variation of gene expression received much less attention than traditional commercial traits in aquaculture.To estimate the genetic variation and heritability of gene transcription in clam Meretrix petechialis,five Vibrio resistance-related genes were selected for gene expression analysis in the digestive gland,and an animal linear model was used to analyze data from quantitative real-time PCR(qRT-PCR).Among the five genes,BIRC7 showed significant additive genetic variations,the heritability of this gene of 12-month-and 15-month-old clams were 0.84±0.32 and 0.91±0.34,respectively.The heritability of other four genes(Bax,NFIL3,Big-Def,and CTL9)expression were low-tomoderate but not significantly expressed.Additionally,no significant phenotypic and genetic correlations between the BIRC7 transcription trait and body size were detected.This study highlights that certain gene expression variation is heritable and provides a reference for indirect selection of M.petechialis with high Vibrio resistance.JIANG Fengjuan YUE Xin ZHANG Shujing YU Jiajia WANG Rui LIU Baozhong WANG Hongxia 2020Journal of Oceanology and Limnology2020,38,2:1
13Elimination of inter-domain interactions increases the cleavage fidelity of the restriction endonuclease Dralll显示文摘Wei Zhuo Xuhui Lai Liqing Zhang Siu-Hong Chan Fengjuan Li Zhenyu Zhu Maojun Yang Dapeng Sun 2014Protein & Cell2014,5,5:1
14Landscape dynamic network biomarker analysis reveals the tipping point of transcriptome reprogramming to prevent skin photodamage显示文摘Skin,as the outmost layer of human body,is frequently exposed to environmental stressors including pollutants and ultraviolet(UV),which could lead to skin disorders.Generally,skin response process to ultraviolet B(UVB)irradiation is a nonlinear dynamic process,with unknown underlying molecular mechanism of critical transition.Here,the landscape dynamic network biomarker(lDNB)analysis of time series transcriptome data on 3D skin model was conducted to reveal the complicated process of skin response to UV irradiation at both molecular and network levels.The advanced l-DNB analysis approach showed that:(i)there was a tipping point before critical transition state during pigmentation process,validated by 3D skin model;(ii)13 core DNB genes were identified to detect the tipping point as a network biomarker,supported by computational assessment;(iii)core DNB genes such as COL7A1 and CTNNB1 can effectively predict skin lightening,validated by independent human skin data.Overall,this study provides new insights for skin response to repetitive UVB irradiation,including dynamic pathway pattern,biphasic response,and DNBs for skin lightening change,and enables us to further understand the skin resilience process after external stress.Chengming Zhang Hong Zhang Jing Ge Tingyan Mi Xiao Cui Fengjuan Tu Xuelan Gu Tao Zeng Luonan Chen 2021Journal of Molecular Cell Biology2021,13,11:1
15Amelioration of high fat diet induced liver lipogenesis and hepatic steatosis by interleukin-22显示文摘Ling Yang Yixuan Zhang Lingdi Wang Fengjuan Fan Lu Zhu Zhigang Li Xiangbo Ruan Heng Huang Zhenzhen Wang Zhihua Huang Yuliang Huang Xiaoqiang Yan Yan Chen 2010Journal of Hepatology2010,,2:1
16Capacitive Humidity Sensors Based on Ni/SiNWs Nanocomposites 显示文摘Tao Bairu Zhang Jian Miao Fengjuan 2009Sensors and Actuators B2009,136,1:1
17The shallow meridional overturning circulation in the South China Sea and the related internal water movement显示文摘The structure of the annual-mean shallow meridional overturning circulation(SMOC) in the South China Sea(SCS) and the related water movement are investigated,using simple ocean data assimilation(SODA) outputs.The distinct clockwise SMOC is present above 400 m in the SCS on the climatologically annual-mean scale,which consists of downwelling in the northern SCS,a southward subsurface branch supplying upwelling at around 10°N and a northward surface flow,with a strength of about 1×10~6 m^3/s.The formation mechanisms of its branches are studied separately.The zonal component of the annual-mean wind stress is predominantly westward and causes northward Ekman transport above 50 m.The annual-mean Ekman transport across 18°N is about 1.2×10~6 m^3/s.An annual-mean subduction rate is calculated by estimating the net volume flux entering the thermocline from the mixed layer in a Lagrangian framework.An annual subduction rate of about 0.66×10~6m^3/s is obtained between 17° and 20°N,of which 87% is due to vertical pumping and 13% is due to lateral induction.The subduction rate implies that the subdution contributes significantly to the downwelling branch.The pathways of traced parcels released at the base of the February mixed layer show that after subduction water moves southward to as far as 11°N within the western boundary current before returning northward.The velocity field at the base of mixed layer and a meridional velocity section in winter also confirm that the southward flow in the subsurface layer is mainly by strong western boundary currents.Significant upwelling mainly occurs off the Vietnam coast in the southern SCS.An upper bound for the annual-mean net upwelling rate between 10° and 15°N is 0.7×10~6m^3/s,of which a large portion is contributed by summer upwelling,with both the alongshore component of the southwest wind and its offshore increase causing great upwelling.ZHANG Ningning LAN Jian MA Jie CUI Fengjuan 2016Acta Oceanologica Sinica2016,35,7:1
18Giant efficiency and color purity enhancement in multicolor inorganic perovskite light-emitting diodes via heating-assisted vacuum deposition显示文摘Inorganic perovskites(Cs Pb X3(X=I,Br,Cl))have broad prospection in the field of high-definition displaying due to its excellent optoelectronic characteristics.The vacuum deposition process possesses advantages and competitiveness in the industrialized production.However,the performance of light emitting diodes(LEDs)based on vacuum-deposited is incredibly low.Herein,we proposed a heating-assisted vacuum deposition(HAVD)method to construct inorganic perovskite LEDs(Pe LEDs)with enhanced performance.The roughness and crystallinity of perovskite film were improved by regulating the heating treatment of substrates.And the perovskite film exhibited largely rise in luminescence,with decreasing defect density.Consequently,with the optimized temperature,the green Pe LEDs exhibited 100-fold improvement of external quantum efficiency(EQE)with the luminance of up to 11941 cd/m2,and the full width at half-maximum(FWHM)of the electroluminescence(EL)spectra was decreased from 25 to 17 nm.At the same time,the red and blue Pe LEDs also exhibited obvious enhancement in EQE and luminance by HAVD method,and both the FWHM of EL spectra dropped below 20 nm,exhibiting excellent high color purity.HAVD strategy has a huge potential to be a new commonly used method for low-cost fabrication of displays and lighting.Boning Han Qingsong Shan Fengjuan Zhang Jizhong Song Haibo Zeng 2020Journal of Semiconductors2020,41,5:1
19Suppression of matrix metalloproteinase-9 expression by RNA interference inhibits SGC7901 gastric adenocarcinoma cell growth and invasion in vitro and in vivo显示文摘Fengjuan Zhao Qingyu Zhang Chunsheng Kang Xiaowei Cui Tao Wang Peng Xu Xuan Zhou Jian Liu Xiaomei Song 2010Medical Oncology2010,,3:1
20A study of secondary school English teachers' beliefs in the context of curriculum reform in China 显示文摘Zhang Fengjuan & Liu Yongbing 2014Language Teaching Research2014,,18:1
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