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PpARF6 acts as an integrator of auxin and ethylene signaling to promote fruit ripening in peach

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Horticulture Research 2023年第9期10卷 151-164页

作者： Xiaomei Chen Yudi Liu xian zhang Beibei zheng Yuepeng Han Ruo-Xi zhang CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenThe Innovative Academy of Seed Design of Chinese Academy of SciencesWuhan 430074China University of Chinese Academy of Sciences 19A YuquanluBeijing 100049China Hubei Hongshan Laboratory Wuhan 430070China

Although auxin is known to induce ethylene biosynthesis in some Rosaceae fruit crops,the mechanisms underlying the auxin–ethylene interaction during fruit ripening remain largely ***,the regulatory role of an auxin response factor,PpARF6,in fruit ripening was investigated in *** fruits showed accelerated ripening after treatment with auxin and PpARF6 was found to be significantly ***6 not only could induce ethylene synthesis by directly activating the transcription of ethylene biosynthetic genes,but also competed with EIN3-binding F-box proteins PpEBF1/2 for binding to ethylene-insensitive3-like proteins PpEIL2/3,thereby keeping PpEIL2/3 ***,PpARF6 showed an interaction with PpEIL2/3 to enhance the PpEIL2/3-activated transcription of ethylene biosynthetic ***,ectopic overexpression of PpARF6 in tomato accelerated fruit ripening by promoting the expression of genes involved in ethylene synthesis and fruit *** summary,our results revealed a positive regulatory role of PpARF6 in peach fruit ripening via integrating auxin and ethylene signaling.

关键词： interaction integrating thereby

A novel active-passive protection strategy endows carbonyl iron with excellent intelligent anti-corrosion and microwave absorption dual functional characteristics

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Nano Research 2025年第1期18卷 487-500页

作者： Wei Tian Quanyuan Feng Linbo zhang Yinfan Liu xian Jian Longjiang Deng Institute of Microelectronics School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 611756China National Engineering Researching Centre of Electromagnetic Radiation Control Materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaHuzhou 313001China

Carbonyl iron absorbers(CI)face significant challenges in practical applications,such as corrosion,interface bonding failure,detachment,and high maintenance ***,we have developed intelligent self-healing technology based on proactive/passive mechanisms via in situ synthesis of self-healing factors(polydopamine/benzotriazole(PDA/BTA))and physical barrier layers(SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane,SiO_(2)/HMDS)to enhance corrosion resistance,while also being compatible with efficient microwave absorption *** unique multiscale structure gives full play to the utilization of the roles of each functional layer,including the intelligent self-healing features of PDA/BTA,physical shielding and spatial confinement characteristics of SiO_(2)/HMDS,and magnetic-dielectric synergistic mechanism resulted from the good impedance matching characteristics,the conduction loss,the interfacial polarization loss and natural *** asfabricated composites achieved an exceptional minimum reflection loss value of-55.4 dB at 10.7 GHz and the effective absorption band of 7.6 ***,it still exhibits obvious self-healing and corrosion resistance characteristics after 360 h corrosion treatment,ascribed to the self-healing mechanism of PDA/BTA and the blocking intervention effect of SiO_(2)/*** work is considered to pave the way for the synthesis of high-performance magnetic absorbers,especially in enhancing their intelligent self-healing ability in corrosive environments.

关键词： microwave absorption intelligent self-healing technology carbonyl iron multiscale structure magneticdielectric synergistic mechanism

纳米疗法介导铁死亡触发内源性信号特异性激活cGAS-STING通路用于增强肿瘤免疫治疗

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Science Bulletin 2023年第6期68卷 622-636,M0004页

作者：梁军龙金小康张诗曼黄千笑纪萍邓鑫辰程巳雪陈巍海张先正 Key Laboratory of Biomedical Polymers of Ministry of Education&Department of Chemistry Wuhan UniversityWuhan 430072China Cancer Precision Diagnosis and Treatment and Translational Medicine Hubei Engineering Research Center Zhongnan Hospital of Wuhan UniversityWuhan 430071China

激活环状GMP-AMP合成酶-干扰素基因刺激因子(cGAS-STING)通路可以有效启动抗肿瘤免疫,但如何特异性地激活STING通路仍是一个巨大的挑战.本文设计了一种铁死亡触发肿瘤细胞线粒体DNA释放,用于激活STING通路的肿瘤免疫治疗纳米平台(命名为... 详细信息

激活环状GMP-AMP合成酶-干扰素基因刺激因子(cGAS-STING)通路可以有效启动抗肿瘤免疫,但如何特异性地激活STING通路仍是一个巨大的挑战.本文设计了一种铁死亡触发肿瘤细胞线粒体DNA释放,用于激活STING通路的肿瘤免疫治疗纳米平台(命名为HBMn-FA).一方面,HBMn-FA介导的铁死亡可以诱导肿瘤细胞中活性氧(ROS)水平急剧升高,引起线粒体氧化应激,释放内源性信号分子-线粒体DNA,并在Mn^(2+)的协同作用下特异性启动cGAS-STING通路.另一方面,HBMn-FA也可以造成肿瘤细胞死亡,并释放死亡肿瘤细胞碎片中的胞质双链DNA(dsDNA)进一步激活抗原提呈细胞(如DC细胞)中的cGAS-STING通路.通过建立铁死亡和cGAS-STING通路之间的连接可以快速启动全身抗肿瘤免疫响应,并增强免疫检查点疗法,从而抑制局部和转移性肿瘤的生长.

关键词： Nanotherapeutics Ferroptosis mtDNA release cGAS-STING pathway Tumor immunotherapy

Nonlinear robust control of a quadrotor helicopter with finite time convergence

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Control Theory and Technology 2018年第2期16卷 133-144页

作者： Guozhou zheng Bin xian School of Electrical and Information Engineering Tianjin University Tianjin 300072 China

In this paper, the control problem for a quadrotor helicopter which is subjected to modeling uncertainties and unknown external disturbance is investigated. A new nonlinear robust control strategy is proposed. First, a nonlinear complementary filter is developed to fuse the raw data from the onboard barometer and the accelerometer to decrease the negative effects from the noise associated with the low-cost onboard sensors Then the adaptive super-twisting methodology is combined with a backstepping method to formulate the nonlinear robust controller for the quadrotor＇s attitude angles and the altitude position. Lyapunov based stability analysis shows that finite time convergence is ensured for the closed-loop operation of the quadrotor＇s roll angle, pitch angle, row angle and the altitude position. Real-time flight experimental results, which are performed on a quadrotor flight testbed, are included to demonstrate the good control performance of the proposed control methodology.

关键词： Quadrotor nonlinear control finite time convergence real-time experiment

Preparation of PMAA-coated Dysprosium Ferrite Ferrofluids and Study on the Superparamagnetism

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Chemical Research in Chinese Universities 2002年第1期18卷 30-33页

作者： ZHU Chuan-zheng SHEN Qin HU xian-luo zhang Jie ZHAO Hong Department of Chemistry East China Normal UniversityShanghai 200062P.R.China

The present paper covers the unprecedented preparation of stable aqueous Dy-ferrite ferrofluids, whereby colloidal Dy_ δ Fe_ 3- δ O_4 ultrafine particles were dispersed by using polymeric surfactant PMAA. The stabilities of the series of the ferrofluids were studied according to the stability indexes. The susceptibility measurements were made with a Farady-type magnetic balance at various temperatures and magnetic field intensities. In terms of Langevin function, the σ versus H/T curves showed that Dy-ferrite ferrofluids exhibited superparamagnetism behavior and the blocking temperatures were in the range from 160 to 200 K. Moreover, the ferrofluids were characterized by means of Infra-red spectroscopy, transmission electron microscopy, X-ray diffraction, and Mssbauer spectroscopy.

关键词： Dy-ferrite ferrofluid Susceptibility Superparamagnetism Stability PMAA

Video-based measurement and data analysis of traffic flow on urban expressways

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Acta Mechanica Sinica 2011年第3期27卷 346-353页

作者： xian-Qing zheng zheng Wu Shi-Xiong Xu Ming-Min Guo Zhan-Xi Lin Ying-Ying zhang Department of Mechanics and Engineering Science Fudan University 200433 Shanghai China

A new video-based measurement is proposed to collect and investigate traffic flow parameters. The output of the measurement is velocity-headway distance data pairs. Because density can be directly acquired by the reciprocal of headway distance, the data pairs have the advantage of better simultaneity than those from common detectors. By now, over 33 000 pairs of data have been collected from two road sections in the cities of Shanghai and zhengzhou. Through analyzing the video files recording traffic movements on urban expressways, the following issues are studied：laws of vehicle velocity changing with headway distance, proportions of di0erent driving behaviors in the traffic system, and characteristics of traffic flow in snowy days. The results show that the real road traffic is very complex, and factors such as location and climate need to be taken into consideration in the formation of traffic flow models.

关键词： Traffic flow mode - Video-based - Vehicle recog- nition. Driving behavior - Snowy day traffic

Tailoring mechanical heterogeneity,nanoscale creep deformation and optical properties of nanostructured Zr-based metallic glass

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Rare Metals 2023年第10期42卷 3430-3442页

作者： Jing-xian Cui Qiang Luo zheng-Guo zhang Jing-Tao Zhu Bao-Long Shen School of Materials Science and Engineering Jiangsu Key Laboratory for Advanced Metallic MaterialsSoutheast UniversityNanjing211189China School of Physics Science and Engineering Tongji UniversityShanghai200092China

Metallic glasses are spatially heterogeneous at the nanometer ***,the effects of external excitation on their structural and mechanical heterogeneity and the correlation to their properties are still ***,atomic force microscopy(AFM) and high-resolution transmis sion elec tron micro scopy(HRTEM) were carried out to explore the effects of cryogenic thermal cycling(CTC) on mechanical/structural heterogeneity,nano sc ale creep deformation and optical properties of nano structured metallic glass thin films(MGTFs).The results indicate that CTC treatment alters the distribution fluctuations of hardness/modulus and energy dissipation and results in an increase-then-decrease variation in mechanical *** applying Maxwell-Voigt model,it can be shown that CTC treatment results in a remarkable activation of more defects with longer relaxation time in soft regions but has only a slight effect on defects in hard *** addition,CTC treatment increases the transition time from primary-state stage to steady-state stage during creep *** enhanced optical reflectivity of the MGTFs after 15 thermal cycles can be attributed to increased aggregation of Cu and Ni *** results of this study shed new light on understanding mechanical/structural heterogeneity and its influence on nanoscale creep deformation and optical characteristics of nanostructured MGTFs,and facilitate the design of high-performance nanostructured MGTFs.

关键词： Metallic glass thin films(MGTFs) Cryogenic thermal cycling(CTC) Structural heterogeneity Mechanical and creep properties Optical characteristics

Fabricating amide functional group modified hyper-cross-linked adsorption resin with enhanced adsorption and recognition performance for 5-hydroxymethylfurfural adsorption via simple one-step

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Chinese Journal of Chemical Engineering 2022年第3期35卷 230-239页

作者： Lei Hu Shunhui Tao Junting xian Xiaodong zhang Yao Liu Xiaojie zheng Xiaoqing Lin School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery Guangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong University of TechnologyGuangzhou 510006China

In this study,three kinds of amide functional group modified hyper-cross-linked adsorption resin were synthesized by alternating radical copolymerization in simple one-step and applied for 5-hydroxymethylfurfural(5-HMF)*** successful synthesis and properties of adsorbents were evaluated with Fourier transform infrared spectroscopy,scanning electron microscopy,nitrogen adsorption-desorption isotherms,thermogravimetric analysis,and elemental ***(N,N’-4,4’-diphenyl methane-bismaleimide-alt-divinylbenzene)(poly(BDM-alt-DVB))resin exhibited highest adsorption capacity for 5-HMF(64.0 mg·g^(-1)wet resin)and excellent adsorption selectivity(a_(5-HMF/LA)=2.71±0.12,α_(5-HMF/FA)=13.88±0.15,α_(5-HMF/Glucose)=11.91±1.11)in the multi-component solution at 25℃.Langmuir isotherm model well fitted the equilibrium adsorption data within the initial 5-HMF concentration range of 0.5-10.0 g·L^(-1) with highest correlation ***,the thermodynamic parameters demonstrated that the adsorption of 5-HMF onto poly(BDM-alt-DVB)resin was spontaneous and *** study revealed that the adsorption process was fast,reaching equilibrium within12 ***,the poly(BDM-alt-DVB)resin also demonstrated excellent *** summary,the poly(BDM-alt-DVB)resin will be useful in 5-HMF hydrolysate separation applications.

关键词： Adsorption 5-Hydroxymethylfurfural Isotherm Thermodynamics Kinetics Mechanism

Ecological Risk of Heavy Metals in Sediment Around Techeng Island Special Marine Reserves in Zhanjiang Bay

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Journal of Ocean University of China 2020年第3期19卷 561-568页

作者： zhang Cuiping zheng Zhaoyong YAO Shaohui JIA Houlei xian xianheng WANG Liang South China Sea Planning and Environment Research Institute SOAGuangzhou 510300China South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301China

The concentrations of five metals(Cu, Pb, Zn, Cd and Hg) were measured in sediments obtained before and after the establishment of Techeng Island Special Marine Reserves(TCISMR) in Zhanjiang Bay to evaluate the ecological risk of heavy metals. The results showed that average values of potential ecological risk indexes of heavy metals at all stations increased slightly from 32.09 to 30.54 after establishment of TCISMR. Optimal semivariance simulation showed that the contents of five heavy metals have strong spatial correlations in August 2010(before), while this correlations weakened in April 2013(after establishment of TCISMR), suggesting that the main sources of heavy metals changed. The Hakanson Risk Index(HRI) values in Donghai levee, central and southern parts of Zhanjiang harbor were high up to 60.13 and 46.46, respectively. And Zhanjiang Bay Channel, the areas around special marine reserves, the artificial reef areas and mangrove areas at south of Techeng Island are the areas with low ecological risk and high ecological value, which should be treated as the prior ecological protection areas. Our study provided a priority control pattern of heavy metal pollution in TCISMR, which greatly benefits the sustainable development and resource protection in Zhanjiang Bay.

关键词： Techeng Island Special Marine Reserves surface sediment heavy metals potential ecological risk prior conservation area