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Map-based cloning and functional analysis of the chromogen gene C in rice (Oryza sativa L.)
Shasha Zhao,Cuihong Wang,Jian Ma,Shuai Wang,Peng Tian,Jiulin Wang,Zhijun Cheng,Xin Zhang,Xiuping Guo,Cailin Lei 한국식물학회 2016 Journal of Plant Biology Vol.59 No.5
The chromogen gene C is critical for anthocyanin regulation in rice, and apiculus color is an important agronomic trait in selective breeding and variety purification. Mapbased cloning and in-depth functional analysis of the C gene will be useful for understanding the molecular mechanism of anthocyanin biosynthesis and for rice breeding. Japonica landrace Lijiangxintuanheigu (LTH) has red apiculi and purple stigmas. Genetic analysis showed that red apiculus and purple stigma in LTH co-segregated indicating control by a single dominant gene, or by two completely linked genes. Using 1,851 recessive individuals from two F2 populations, the target gene OsC was delimited to a 70.8 kb interval on chromosome 6 that contains the rice homologue of the maize anthocyanin regulatory gene C1. When the entire OsC gene and its full-length cDNA cloned from LTH were transformed into japonica cultivar Kitaake with colorless apiculi and stigmas all positive transformants had red apiculi but non-colored stigmas, validating that OsC alone was responsible for the apiculus color and represented the functional C gene. OsC was constitutively expressed in all tissues examined, with strongest expression in leaf blades. These results set a foundation to clarify the regulatory mechanisms of OsC in the anthocyanin biosynthetic pathway.
Optimal Price Strategy Selection for MVNOs in Spectrum Sharing: An Evolutionary Game Approach
( Shasha Zhao ),( Qi Zhu ),( Hongbo Zhu ) 한국인터넷정보학회 2012 KSII Transactions on Internet and Information Syst Vol.6 No.12
The optimal price strategy selection of two bounded rational cognitive mobile virtual network operators (MVNOs) in a duopoly spectrum sharing market is investigated. The bounded rational operators dynamically compete to sell the leased spectrum to secondary users in order to maximize their profits. Meanwhile, the secondary users` heterogeneous preferences to rate and price are taken into consideration. The evolutionary game theory (EGT) is employed to model the dynamic price strategy selection of the MVNOs taking into account the response of the secondary users. The behavior dynamics and the evolutionary stable strategy (ESS) of the operators are derived via replicated dynamics. Furthermore, a reward and punishment mechanism is developed to optimize the performance of the operators. Numerical results show that the proposed evolutionary algorithm is convergent to the ESS, and the incentive mechanism increases the profits of the operators. It may provide some insight about the optimal price strategy selection for MVNOs in the next generation cognitive wireless networks.
( Shasha Zhao ),( Fei Wang ),( Yueqiang Ning ),( Yi Xiao ),( Dengying Zhang ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.11
Future network scenario will be a heterogeneous wireless network environment composed of multiple networks and multimode terminals (MMT). Seamless switching and optimal connectivity for MMT among different networks and different services become extremely important. Here, a vertical handoff algorithm combined an improved entropy weighting method based on grey relational analysis (GRA) is proposed. In which, the improved entropy weight method is used to obtain the objective weights of the network attributes, and GRA is done to rank the candidate networks in order to choose the best network. Through simulation and comparing the results with other vertical handoff decision algorithms, the number of handoffs and reversal phenomenon are reduced with the proposed algorithm, which shows a better performance.
Shasha Jiao,Tiehu Li,Chuanyin Xiong,Chen Tang,Alei Dang,Hao Li,Tingkai Zhao 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.15 No.01
In this study, a three-dimensional hybrid was synthesized via depositing of carbon nanotubes (CNTs) and ferroferric oxide (Fe3O4) particles on the abandoned disposable sheet mask fabric, followed by the polymerization of polypyrrole (PPY). The as-prepared nanocomposite shows superior electrochemical performances when it was used for the material for the flexible supercapacitor electrode. Benefiting from the synergistic effect of CNTs, Fe3O4 and PPY in such a porous structure, cyclic voltammetry and galvanostatic charge/discharge measurements indicated that the as-prepared hybrid possessed a good reversibility and high specific capacity at various scanning rates. It turned out that the as-prepared electrode demonstrated a high specific capacitance of 221.7 F/g at the scanning rate of 50 mV/s and long-life cycling stability of 88.2% after 10000 cycles. Besides, the electrode composite had good flexibility after repeated bending times of 3000. With the exception of improved electrochemical properties, this hybrid electrode material also showed many advantages, including facile preparation, flexibility and cost savings. These results will provide new ideas and solutions to design and fabricate the flexible supercapacitors, which has great prospect in the development of energy storage devices.
Yong Yan,Shasha Li,Yufeng Ou,Yaxin Ji,Zhou Yu,Lian Liu,Chuanpeng Yan,Yong Zhang,Yong Zhao 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.6
Crystalline In2Se3 films were fabricated by magnetron sputtering from a sintered In2Se3-compound target and the effects of the deposition parameters, including the working pressure and deposition time, on the phase composition, structure, morphology, and optical properties were clarified. Single-phase κ-In2Se3 was prepared at 4.0 Pa, but γ-In2Se3 was recognized when the working pressure was lower than 4.0 Pa. The optical transmittance of the films decreased to 45% and the optical band gap varied from 2.9 to 2.0 eV with increasing film thickness from 80 to 967 nm. Metal-semiconductor-metal (MSM) photodetectors based on γ-In2Se3 thin films with various thicknesses were also fabricated. The result of photosensitivity research on such MSM photodetectors suggests that it may be impossible to fabricate wide-absorption-range MSM devices by just using a single material (γ-In2Se3) because of spatial potential fluctuations in the layers.