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Zhu Yanyan,Tang Wei,Tang Xiaofeng,Wang Lihuan,Li Wei,Zhang Qian,Li Mingzhang,Fang Congbing,Liu Yongsheng,Wang Songhu 한국식물생명공학회 2021 Plant biotechnology reports Vol.15 No.5
Colchicine-induced polyploidization has been extensively utilized in plant-breeding programs to increase biomass and overall yield of various crop species. Chromosome doubling usually increases the plant size and cell size. However, the underly- ing mechanisms remain elusive. In this study, we showed that 0.1% colchicine is an optimized concentration for inducing tetraploidization of Actinidia chinensis var. chinensis ‘Hongyang’, a commercially important diploid kiwifruit cultivar. The tetraploid plants showed increased plant height, leaf size, and biomass, as compared with the corresponding diploid plants. Scanning electron microscopy and histological analysis indicated that the leaf cell size was significantly increased in the tetraploid plants. Our further transcriptome analysis revealed the 5922 differentially expressed genes between the diploid and tetraploid plants. Gene Ontology analysis enriched the cell wall-related genes, including the pectin methylesterases (PMEs) and expansins (EXPs), both of which play a critical role in cell wall loosening and extension. The increased expression of PME and EXP genes might contribute to the increased cell size in the tetraploid plants. Together, our work indicated that tetraploidization increases the organ and cell size in kiwifruit, possibly by enhancing the cell wall extensibility.
Active control of amplitude and phase of high-power RF systems in EAST ICRF heating experiments
Zhu Guanghui,Liu Lunan,Mao Yuzhou,Zhang Xinjun,Guo Yaoyao,Ai Lin,Jiang Runhao,Qin Chengming,Zhang Wei,Yang Hua,Yuan Shuai,Wang Lei,Ju Songqing,Wang Yongsheng,Sun Xuan,Yang Zhida,Wang Jinxin,Cheng Yan 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.2
The EAST ICRF system operating space has been extended in power and phase control with a low-level RF system for the new double-strap antenna. Then the multi-step power and periodic phase scanning experiment were conducted in L-mode plasma, respectively. In the power scanning experiment, the stored energy, radiation power, plasma impedance and the antenna's temperature all have positive responses during the short ramp-ups of PL;ICRF. The core ion temperature increased from 1 keV to 1.5 keV and the core heating area expanded from jZj 5 cmto jZj 10 cm during the injection of ICRF waves. In the phasing scanning experiment, in addition to the same conclusions as the previous relatively phasing scanning experiment, the superposition effect of the fluctuation of stored energy, radiation power and neutron yield caused by phasing change with dual antenna, resulting in the amplitude and phase shift, was also observed. The active control of RF output facilitates the precise control of plasma profiles and greatly benefits future experimental exploration.
Hengjia Zhu,Jianming Pan,Jun Cao,Yue Ma,Fengxian Qiu,Wenli Zhang,Yongsheng Yan 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.49 No.-
Herein we reported a facile method to prepare porous ion/molecule imprinted polymers (I-MIPs) viatwice imprinting strategy for the simultaneous uptake of copper ions (Cu(II)) and l-cyhalothrin (LC). Firstly, N-(b-aminoethyl)-g-aminopropytrimethoxysilane (DAMO) was grafted on silica particles surfaceto synthesis Cu(II)-imprinted polymers to introduce iron imprinted sites. They were then utilized asstabilizers to prepare a stable W/O Pickering HIPEs template (LC as the imprinting molecule), which wasthen polymerized with dual imprinting sites including Cu(II) and LC. The adsorption equilibrium, kineticresults and selective recognition experiments were exhibited their prospected dual selectivity andsimultaneous removal of LC and Cu(II).
Design and evaluation of a 7-DOF cable-driven upper limb exoskeleton
Feiyun Xiao,Yongsheng Gao,Yong Wang,Yanhe Zhu,Jie Zhao 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.2
This paper presents a seven degrees of freedom cable-driven upper limb exoskeleton (CABXLexo-7), which is compact, lightweight, and comfortable for post-stroke patients. To achieve the compactness of exoskeleton, two types of cable-driven differential mechanisms were designed. The cable-conduit mechanisms were applied to transmit the power of motors mounted on the backboard to the corresponding joints, then the whole weight of the exoskeleton could be light to ensure a comfortable motion assistance. In the course of experiments, the surface electromyography signals of major muscles related with the movements of upper limb were collected to evaluate the assistant ability of exoskeleton. The experimental results showed that the activation levels of corresponding muscles were reduced by using the seven degrees of freedom cable-driven upper limb exoskeleton in the course of rehabilitation, and it demonstrated that the exoskeleton can provide effective movements assistance to the post-stroke patients.
Patterned growth of ZnO nanorods and their field emission properties
Ning Zhang,Ke Yu,Yongsheng Zhang,Wei Bai,Ziqiang Zhu 한국물리학회 2009 Current Applied Physics Vol.9 No.1
Patterned zinc oxide (ZnO) nanorods were fabricated on the different patterned silicon nanocrystallite (SiNC) substrates via a simple thermal evaporation method without any catalyst. The as-synthesized products were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), respectively. The efficient field emission with low turn-on and threshold field, 3.5 V/㎛ and 8.1 V/㎛, was obtained. The experimental results demonstrate that these products could be one of the promising candidates for field emission displays. Patterned zinc oxide (ZnO) nanorods were fabricated on the different patterned silicon nanocrystallite (SiNC) substrates via a simple thermal evaporation method without any catalyst. The as-synthesized products were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), respectively. The efficient field emission with low turn-on and threshold field, 3.5 V/㎛ and 8.1 V/㎛, was obtained. The experimental results demonstrate that these products could be one of the promising candidates for field emission displays.
Xin Yao,CHANGCHANG MA,Hai Huang,Zhi Zhu,Hongjun Dong,Chunxiang Li,Wenli Zhang,Yongsheng Yan,Yang Liu 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.3
In this paper, the biomass carbon quantum dots (CQDs) modified flower-like BiOI (CQDs/BiOI) composite photocatalyst was synthesized by a facile solvothermal method. Compared with the pristine BiOI, the biomass CQDs/BiOI exhibited outstanding photocatalytic activity for degradation of the typical methylene blue (MB) under visible light irradiation since the biomass CQDs could act as electron acceptors to effectively facilitate the separation efficiency of photon-generated carriers and prolong their lifetime. Furthermore, the mechanism detection experiment showed that the ·O2 - and H+ were major activity species, and the photocatalytic electron transfer mechanism was further investigated. This work provided a new insight into biomass CQDs effects and took an important step toward the development of improving Bi-based semiconductor photocatalyst activity.
Modeling and Control of a Magnus-effect-based Ducted Fan Aerial Vehicle
Qingming Hou,Hongzhe Jin,Yanhe Zhu,Yongsheng Gao,Jie Zhao 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.4
A ducted fan aerial vehicle model using Magnus effect steering engine is proposed in this paper. This model utilizes a steering engine that comprises four cylinders that are symmetrically installed at the aft inside the duct. Interaction between the spinning cylinder surface and the duct jet flow causes the aerodynamic lift proportional to angular velocity of the cylinder. Therefore, operating range of the aerodynamic lift is guaranteed to be sufficiently wide. The efficiency of the proposed method is confirmed via numerical simulations on integrated flight dynamics developed in this study.
Optical properties of ZnO nanocrystals synthesized by sol-gel method
Ho Jung Chang,Chang-Sik Son,Cheng Zhu Lu,In-Hoon Choi,Seong-Il Kim,Yongsheng Wang,Young-Hwan Kim 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.45 No.1
ZnO nanocrystals were synthesized by using a sol-gel method and their optical properties were investigated as functions of the ZnO nanoparticle size. The photoluminescence spectrum showed two peaks: one was an ultraviolet (UV) exciton emission at around 363 nm, and the other was a visible emission at around 500 nm that originated from deep-band traps. As the particle size was increased, the intensity of the visible emission decreased, while that of the UV emission increased. Both the UV and the visible emissions shifted to a lower energy with increasing particle size. The band-edge emission exhibited a red-shift in relation to the absorption edge due to the Stokes shift. Exciton emission was observed at a slightly red-shifted wavelength with an energy of 180 meV in respect to the absorption onset, as observed in other II-VI semiconductor nanocrystals.