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Effect of Different Calcination Temperatures on the Structure and Properties of Zirconium-Based Coating Layer modified Cathode Material Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)

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Acta Metallurgica Sinica(English Letters) 2022年第6期35卷 985-995页

作者： Zijun Liao Jiankai Kang Qi Luo Caifeng Pan Jiangdong Chen xiaolong mo Hanbo Zou Wei Yang Shengzhou Chen School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Institute of Energy and Catalysis Guangzhou UniversityGuangzhou 510006China Key Laboratory of Fuel Cell Technology of Guangdong Province Guangzhou 510006China

Lithium-rich manganese-based oxides have the advantages of high discharge specific capacity, so they are potential candidates for advanced lithium battery cathode materials. However, they also have drawbacks to be solved such as serious irreversible loss of capacity and voltage decay in the cycling process. Surface coating method was used in this paper to modify the lithium-rich manganese-based oxide(LRmo,Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_(2)) to improve its electrochemical properties. Zirconium-based compounds coated LRmo materials(ZBC@LRmo) were obtained via the reaction of lithium hydroxide with zirconium n-butanol and subsequent thermal treatment at different temperatures. The results of X-ray diffraction and transmission electron microscopy confirm that the crystal structure and composition of the ZBC coating layer vary with the calcination temperature. The coating layer obtained at 600 ℃ is composed of tetragonal ZrO_(2) and Li_(2)ZrO_(3). The ZBC@LRmo sample with tetragonal ZrO =2 and Li_(2)ZrO_(3) composite exhibits the best electrochemical performance: the discharge capacity of ZBC@LRmo can reach 296 mAh g^(-1) at 0.1 C and 120 mAh g^(-1) at high rate of 5 C.

关键词： Lithium-ion battery Cathode material Zirconium-based compounds coating Calcination temperature Electrochemical performance

聚醚醚酮/聚醚酰亚胺合金的热学性能与力学性能

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高分子材料科学与工程 2023年第5期39卷 118-124页

作者：莫小龙张园园李元庆黄培付绍云重庆大学航空航天学院重庆400044 输配电装备及系统安全与新技术国家重点实验室重庆400044

通过熔融共混和注塑成型的方法制备了不同质量比的聚醚醚酮/聚醚酰亚胺(PEEK/PEI)合金,确定了各种质量比下时的最佳加工温度。采用热重分析、差示扫描量热分析、动态力学热分析和拉伸、三点弯曲的性能表征方法,研究了PEEK/PEI共混合金... 详细信息

通过熔融共混和注塑成型的方法制备了不同质量比的聚醚醚酮/聚醚酰亚胺(PEEK/PEI)合金,确定了各种质量比下时的最佳加工温度。采用热重分析、差示扫描量热分析、动态力学热分析和拉伸、三点弯曲的性能表征方法,研究了PEEK/PEI共混合金的热学和力学性能随PEEK/PEI质量比的变化趋势。结果表明,各组分比的PEEK/PEI合金均具有良好的热稳定性;随着PEEK含量增加,合金结晶度呈现上升的趋势,而玻璃化转变温度不断下降;室温时,PEEK含量对PEEK/PEI共混物的力学性能影响较弱;当测试温度稍低于PEEK玻璃化转变温度时,其力学性能随着PEEK含量的增加表现出降低的趋势;当测试温度在PEEK与PEI玻璃化转变温度之间时,合金的力学性能随着PEEK含量的增加先下降再上升。最后,基于随机森林法量化了合金质量比及热性能参数对PEEK/PEI合金力学性能的贡献程度。

关键词：聚醚醚酮聚醚酰亚胺共混物常温高温力学性能

探讨PLK1在卵母细胞减数分裂中的调控机制及其与有丝分裂的异同

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中华生殖与避孕杂志 2022年第3期42卷 318-323页

作者：姚波刘凤莫晓龙任艳萍遵义医科大学基础医学院组织胚胎学教研室遵义563000

Polo样激酶1(Polo-like kinase 1,PLK1)是丝氨酸/苏氨酸蛋白激酶家族成员之一。在有丝分裂中,PLK1参与控制中心体成熟、染色体凝聚、动粒-微管附着和胞质分裂。在哺乳动物卵母细胞减数分裂中PLK1也具有与在有丝分裂中类似的功能,但尚缺... 详细信息

Polo样激酶1(Polo-like kinase 1,PLK1)是丝氨酸/苏氨酸蛋白激酶家族成员之一。在有丝分裂中,PLK1参与控制中心体成熟、染色体凝聚、动粒-微管附着和胞质分裂。在哺乳动物卵母细胞减数分裂中PLK1也具有与在有丝分裂中类似的功能,但尚缺少PLK1在卵母细胞减数分裂调节机制方面的系统性的文献综述报道。本文从PLK1在卵母细胞减数分裂各时期的定位情况,及其在卵母细胞染色体凝聚、微管组织中心解聚、γ-微管蛋白和中心粒周蛋白的募集以及后期促进复合物/细胞周期体(anaphase-promoting complex/cyclostome,APC/C)的活化中的作用,这几个方面较为系统地探讨PLK1在卵母细胞减数分裂中的分子机制,及其在有丝分裂与减数分裂之间的异同,为进一步解析卵母细胞减数分裂的分子机制提供理论基础。

关键词： PLK1 卵母细胞减数分裂微管组织中心纺锤体形成

Aurora激酶A调控卵母细胞减数分裂的分子机制

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中国医学科学院学报 2022年第1期44卷 142-148页

作者：刘凤姚波莫晓龙柳琼友任艳萍遵义医科大学基础医学院组织胚胎学教研室贵州遵义563000

Aurora激酶A(AURKA)是Aurora激酶家族成员,其参与有丝分裂进入、中心体成熟和分离、双极纺锤体组装和稳定以及染色体的凝集和分离。AURKA在减数分裂过程中发挥的作用与有丝分裂类似,但其具体作用机制以及其与有丝分裂的异同尚不清楚。... 详细信息

Aurora激酶A(AURKA)是Aurora激酶家族成员,其参与有丝分裂进入、中心体成熟和分离、双极纺锤体组装和稳定以及染色体的凝集和分离。AURKA在减数分裂过程中发挥的作用与有丝分裂类似,但其具体作用机制以及其与有丝分裂的异同尚不清楚。因此本文从AURKA在卵母细胞减数分裂中的定位与活化,及其在调控纺锤体形成、纺锤体组装检查点活化以及动粒-微管附着纠错等方面进行综述,对比AURKA在有丝分裂和卵母细胞减数分裂中的异同,为今后进一步揭示细胞分裂调控机制以及癌症和生殖等相关临床研究奠定理论基础。

关键词：减数分裂 Aurora激酶A 微管组织中心纺锤体组装动粒-微管附着卵母细胞

High-entropy alloy and amorphous alloy composites fabricated by ultrasonic vibrations

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Science China(Physics,Mechanics & Astronomy) 2020年第11期63卷 80-84页

作者： Xiong Liang xiaolong Zhu Xin Li RuoDong mo YongJing Liu Kai Wu Jiang Ma College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China

We successfully fabricate high-entropy alloys and amorphous alloy composites by adopting the proposed ultrasonic vibration *** low-stress,low-temperature method enables us to create composites that combine both amorphous and crystalline *** observations and computed tomography measurements indicate good bonding quality without pores or cracks in the *** to the unique structure which mixes soft and rigid phases,the composite exhibits improved mechanical performance compared to that obtained from a pure single *** results are promising for the manual design and fabrication of smart materials containing multiple phases and compositions.

关键词： amorphous alloy high-entropy alloy dual phase composite structure ultrasonic vibration

Reproduction strategy of nocturnal marine molluscs:running for love

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Integrative Zoology 2023年第5期18卷 906-923页

作者： xiaolong GAO mo ZHANG Shihui LIN Mingxin LYU Xuan LUO Weiwei YOU Caihuan KE State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamenChina Fujian Key Laboratory of Genetics and Breeding of Marine Organisms Xiamen UniversityXiamenChina

The cost of reproduction is the core driver of life history evolution in *** paper demonstrates that the cumulative distance moved and the duration of movement of sexually immature abalones,Haliotis discus hannai,kept in various male and female groups,were significantly higher than those of sexually mature individuals,except when kept in mixed cultures of mature males and *** mixed-culture,sexually mature males moved significantly further and for a longer duration than mature female abalones,and even more so than mature male abalones of any other *** of the LC-MS metabolomics of mature males cultured with sexually mature females(AM)and those cultured with sexually immature females(JM)showed that cyclic adenosine monophosphate(cAMP)acted as a differential metabolic *** 24-h uninterrupted sampling,the concentration of 5-HT and the expression levels of the 5-HT2 and 5-HT6 receptors in AM were significantly higher than those in *** further injection of 5-HT2 and 5-HT6 receptor antagonists,the concentrations of cAMP and PKA rose again,but the cumulative movement duration and distance of male abalones decreased significantly,showing that 5-HT was involved in the regulation of movement behavior of male abalones through the 5-HT2 and 5-HT6 receptor-activated cAMP-PKA *** results demonstrated a significant increase in the movement endurance of mature male abalones cultured with mature females,providing a theoretical basis for understanding the adaptive life history strategies of abalones and suggesting ways to protect diverse benthic resources for abalones during the reproductive stage.

关键词： 5-HT receptor behavior Haliotis discus hannai metabolism reproduction cost

Study on RNAi-based herbicide for Mikania micrantha

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Synthetic and Systems Biotechnology 2021年第4期6卷 437-445页

作者： Jiantao Mai Lingling Liao Rongsong Ling xiaolong Guo Jingying Lin Beixin mo Weizhao Chen Yu Yu Guangdong Provincial Key Laboratory for Plant Epigenetics Longhua Bioindustry and Innovation Research InstituteCollege of Life Sciences and OceanographyShenzhen University1066 Xueyuan AvenueShenzhen518000PR China Institute for Advanced Study Shenzhen University3688 Nanhai AvenueShenzhen518000PR China College of Materials Science and Engineering Shenzhen University1066 Xueyuan AvenueShenzhen518000PR China Shenzhen Key Laboratory for Microbial Gene Engineering College of Life Sciences and OceanographyShenzhen UniversityShenzhen518060PR China

The invasive plant Mikania micrantha Kunth(***)from South America poses a significant threat to the stability and biodiversity of ***,an effective and economical method to control *** is still *** interference(RNAi)has been widely studied and applied in agriculture for trait ***-induced gene silencing(SIGS)can produce RNAi silencing effects without introducing heritable modifications to the plant genome and is becoming a novel nontransformation strategy for plant *** this study,the genes encoding chlorophyll a/b-binding proteins were selected as targets of RNAi,based on high-throughput sequencing of *** transcriptome and bioinformatic analyses of sequence *** types of RNAi molecules,double-stranded RNA,RNAi nanomicrosphere,and short hairpin RNA(shRNA),with their corresponding short interfering RNA sequences were designed and synthesized for SIGS vector construction,from which each RNAi molecule was transcribed and extracted to be sprayed on *** *** water-treated control leaves remained green,leaves treated with RNAi molecules turned yellow and eventually *** real-time PCR showed that the expression levels of target genes were significantly reduced in the RNAi-treated groups compared with those of the control,suggesting that all three types of RNAi herbicides effectively silenced the endogenous target genes,which are essential for the growth of *** also found that shRNA showed better silencing efficiency than the other two *** together,our study successfully designed three types of RNAi-based herbicides that specifically silenced endogenous target genes and controlled the growth of ***,we identified a gene family encoding chlorophyll a/b-binding proteins that is important for the growth and development of *** and could serve as potential targets for controlling the spread of ***.

关键词： Invasive plant Mikania micrantha RNA interference Spray-induced gene silencing Chlorophyll a/b-binding protein Nucleic acid bioherbicide

Tunable valley band and exciton splitting by interlayer orbital hybridization

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npj Computational Materials 2022年第1期8卷 2291-2299页

作者： Dan Wang xiaolong Zou Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen518055China

Magnetic proximity effect has been demonstrated to be an effective routine to introduce valley splitting in two-dimensional van der Waals ***,the control of its strength and the induced valley splitting remains *** this work,taking heterobilayers combining monolayer MSe_(2)(M=mo or W)with room-temperature ferromagnetic VSe_(2)as examples,we demonstrate that the valley splitting for both band edges and excitons can be modulated by the tuning of the interlayer orbital hybridization,achieved by inclusion of different amounts of exact Hartree exchange potential via hybrid ***,we show such tuning of orbital hybridization could be experimentally realized by external strain and electric *** calculations suggest that large valley band splitting about 30 meV and valley exciton splitting over 150 meV can be induced in monolayer MSe_(2).Our work reveals a way to control proximity effects and provides some guidance for the design of optoelectronic and valleytronic devices.

关键词： field splitting orbital

Enabling novel device functions with black phosphorus/moS2 van der Waals heterostructures

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Science Bulletin 2017年第23期62卷 1557-1558页

作者： xiaolong Chen Fengnian Xia Department of Electrical Engineering Yale University New Haven CF 06511 USA

Van der Waals heterostructure, which consists of various two- dimensional （2D） layered materials stacked along the direction perpendicular to their 2D plane, has emerged as a promising material system for device app... 详细信息

关键词： Enabling novel device functions lack phosphorus/moS2 van der Waals heterostructures