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Isomerization of B_6,B_6^- and B_6^+ clusters

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science china Chemistry 2010年第1期53卷 202-209页

作者： WEI GongMin1,PU ZhiFeng2.ZOU Rong3,LI GuoLiang2.3 & luo qiong2.3 1Department of Physics,Capital Normal University,{2. 100048,{2. 2.4} key laboratory of explosion science and technology {2. Institute of technology,{2. 100081,{2. 3Center for Computational Quantum Chemistry,South china Normal University,Guangzhou 510631,{2. Department of Physics Capital Normal University Beijing China state key {2. of {2. science and technology Beijing Institute of Technology Beijing China Center for Computational Quantum Chemistry South China Normal University Guangzhou China

The interconversions between isomers with the same spin multiplicity of neutral B6 and charged B6-and B6+ clusters have been investigated at the B3LYP/6-311+G level of theory,including determination of the minimum energy pathways with transition states connecting the corresponding reactants and *** dynamic calculations,2. isomers were optimized,including 11 novel *** order to further refine the energies,single-point B3LYP/6-311+G(3df) calculations were carried out on the corresponding B3LYP/6-311+G geometries of all isomers of B6,B6-and B6+ and the corresponding isomerization transition *** stability of each isomer of B6(singlet and triplet states),B6-(doublet state) and B6+(doublet state) was analyzed from both thermodynamic and dynamic viewpoints.

关键词： B6 transition state intrinsic reaction coordinate barrier height

一种用于大视场成像和偏振光谱探测的微型可重构超构光学系统

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Engineering 2024年第4期35卷 67-73页

作者： Fei Zhang Minghao Liao Mingbo Pu Yinghui Guo Lianwei Chen Xiong Li qiong He Tongtong Kang Xiaoliang Ma Yuan Ke Xiangang luo state key {2. of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China National key laboratory of Optical Field Manipulation {2. and {2. Chinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Tianfu Xinglong Lake laboratory Chengdu 610299China

Wide-angle imaging and spectral detection play vital roles in tasks such as target tracking,object classification,and ***,limited by their intrinsically different architectures,as determined by frequency dispersion requirements,their simultaneous implementation in a shared-aperture system is ***,we propose a novel concept to realize reconfigurable dual-mode detection based on electrical-control tunable *** a proof-of-concept demonstration,the simultaneous implementation of wide-angle imaging and polarization-spectral detection in a miniature sharedaperture meta-optical system is realized for the first time via the electrical control of cascaded catenary-like *** proposed system supports the imaging(spectral)resolution of approximately 2..8 line-pairs per millimeter(lp·mm^(-1);~80 nm)for an imaging(spectral)mode from 8 to 14 μ*** system also bears a large field of view of about 70°,enabling multi-target recognition in both *** work may promote the miniaturization of multifunctional optical systems,including spectrometers and polarization imagers,and illustrates the potential industrial applications of meta-optics in biomedicine,security,space exploration,and more.

关键词： Metasurfaces Reconfigurable Imaging Spectral

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基于矢量光场的光学加工技术(特邀)

中国激光 2024年第12期51卷 191-205页

作者：许丽佳王青松付小芳张其何琼赵泽宇罗先刚中国科学院光电技术研究所微细加工光学技术国家重点实验室四川成都610209 电子科技大学自动化工程学院四川成都611731 中国科学院光电技术研究所光场调控科学技术全国重点实验室四川成都610209 中国科学院大学材料科学与光电技术学院北京100049 中国科学院光电技术研究所矢量光场研究中心四川成都610209

作为光的基本属性,偏振、振幅和相位提供的自由度对于光场调控具有重要作用。具有空间结构偏振态、振幅和相位分布的矢量光场因具有不同于传统光场的独特性质而被应用于诸多领域。近年来,时空分布特性更加丰富的新型矢量光场逐渐得到关... 详细信息

作为光的基本属性,偏振、振幅和相位提供的自由度对于光场调控具有重要作用。具有空间结构偏振态、振幅和相位分布的矢量光场因具有不同于传统光场的独特性质而被应用于诸多领域。近年来,时空分布特性更加丰富的新型矢量光场逐渐得到关注,它们的出现丰富了矢量光场的种类并提供了新的调控自由度,为光学加工带来了新的契机。综述了近年来发展迅速的基于矢量光场的光学加工技术,包括基于矢量光场的激光微纳制造和基于矢量光场曝光的几何相位液晶平面器件加工等技术,并对其发展趋势和前景进行了展望。

关键词：矢量光场光学加工激光微纳制造光场曝光液晶平面器件悬链线光学

Microstructure and mechanical properties of cryorolled AZ31 magnesium alloy sheets with different initial textures

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International Journal of Minerals,Metallurgy and Materials 2016年第7期23卷 827-834页

作者： Jin-ru luo Ya-qiong Yan Ji-shan Zhang Lin-zhong Zhuang state key {2. for Advanced Metals and Materials University of Science and Technology Beijing

AZ31 magnesium alloy sheets with different strong textures were cryorolled at the liquid-nitrogen temperature to the strain of 4% and 8%. The microstructure and texture of the rolled sheets were investigated via scanning electron microscopy（SEM）, electron backscatter diffraction（EBSD）, and X-ray diffraction（XRD）. The mechanical properties of the sheets were tested through in-plane uniaxial tensile tests at ambient temperature. The tensile stress was exerted in the rolling direction（RD） and transverse directions（TD）. The microstructural and textural evolutions of the alloy during cryorolling were investigated. Due to active twining during rolling, the initial texture significantly influenced the microstructural and textural evolutions of the rolled sheets. A {10 12. extension twin was found as the dominated twin-type in the cryorolled samples. After cryogenic rolling, the ductility of the samples decreased while the strength increased. Twinning also played an important role in explaining the mechanical differences between the rolled samples with different initial textures. The samples were significantly strengthened by the high stored energy accumulated from cryorolling.

关键词： magnesium alloy cryorolling microstructure mechanical properties twinning

Possibility of using strain F9(Serratia marcescens) as a bio-collector for hematite flotation

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International Journal of Minerals,Metallurgy and Materials 2014年第3期21卷 210-215页

作者： Hui-fen Yang Tian Li Yan-hong Chang Hui luo qiong-yao Tang Civil and Environmental Engineering School University of Science and Technology Beijing state key {2. for High-Efficiency Mining and Safety of Metal Mines Ministry of Education

In this study, we characterized strain F9 and evaluated the interaction between strain F9 and hematite by scanning electron microscopy（SEM）, Fourier transform infrared spectrophotometry（FTIR）, zeta potential, flotation, and other methods. The results showed that strain F9 belongs to Serratia marcescens. This brevibacterium had CH2. CH3, and hydroxyl groups on its cell wall, which imparted a strong hydrophobic and negative charge. Adsorption of strain F9 reduced the zeta potential of the hematite surface and increased the hydrophobicity of the hematite surface, thereby generating hydrophobic hematite agglomerates. At least four groups on strain F9 interacted with the hematite surface, which contributed to chemical interactions of carboxylic groups and hydrophobic association among hydrophobic hematite particles. The possible use of strain F9 as a bio-collector for hematite flotation was proved.

关键词： microorganisms Serratia marcescens flotation hydrophobicity hematite

The Role of OsMSH5 in Crossover Formation during Rice Meiosis

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Molecular Plant 2013年第3期6卷 729-742页

作者： qiong luo Ding Tang MO Wang Weixiong luo Lei Zhang Baoxiang Qin Yi Shen Kejian Wang Yafei Li Zhukuan Cheng College of Plant Protection Yunnan Agricultural University Kunming 650201 China state key {2. of Plant Genomics and Center for Plant Gene Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China

MSH5, a meiosis-specific member of the MutS-homolog family, is required for normal level of recombination in budding yeast, mice, Caenorhabditis elegans, and Arabidopsis. Here, we report the identification and characterization of its rice homolog, OsMSH5, and demonstrate its function in rice meiosis. Five independent Osmsh5 mutants exhibited normal vegetative growth and severe sterility. The synaptonemal complex is well installed in Osmsh5, while the chiasma frequency is greatly reduced to approximately 10% of that observed in the wild-type, leading to the homologous non- disjunction and complete sterile phenotype. OsMSH5 is predominantly expressed in panicles. Immunofluorescence studies indicate that OsMSH5 chromosomal localization is limited to the early meiotic prophase I. OsMSH5 can be loaded onto meiotic chromosomes in Oszip4, Osmer3, and hellO. However, those ZMM proteins cannot be localized normally in the absence of OsMSH5. Furthermore, the residual chiasmata were shown to be the least frequent among the zmm mutants, including Osmer3, Oszip4, hellO, and Osmsh5. Taken together, we propose that OsMSH5 functions upstream of OsZIP4, OsMER3, and HEIl0 in class I crossover formation.

关键词： OsMSH5 crossover meiosis rice.

Quality assurance of postharvest grapes against Botrytis cinerea by terbinafine

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Natural Products and Bioprospecting 2023年第1期13卷 502-513页

作者： Yun Zhao qiong Jin Zi-Jiao Wang Xing-Yu Tao Xiao-Dong luo state key {2. of Phytochemistry and Plant Resources in West{2. Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China key laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan ProvinceYunnan Characteristic Plant Extraction LaboratorySchool of Chemical Science and TechnologyYunnan UniversityKunming 650500People’s Republic of China University of Chinese Academy of sciences Beijing 100049People’s Republic of China

Worldwide,fruit is an indispensable treasure house of nutrition for human beings,occupying a vital position of human *** fruit storage requires efficient antifungal agents to control Botrytis cinerea,which is a vital postharvest disease affecting fruit and leading to enormous ***,with the enormous abuse of existing antifungal drugs,the problem of drug-resistant fungi is imminent,making the controlling diseases caused by pathogenic fungi even more *** repurposing is an efficient alternative method,we evaluated a well-known antifungal chemical,terbinafine,against the agricultural pathogen,*** in vitro,as a result,terbinafine showed strong anti-fungal ***,the in vivo antifungal activity of terbinafine was evaluated,the results showed that terbinafine could reduce the decay area on *** could disrupt the cell membrane integrity,increase cell membrane permeability,and eventual cell death of *** addition,terbinafine reduced decay incidence,and weight loss and maintained the soluble solids,titratable acidity,ascorbic acid,total phenolic,and malondialdehyde content during the storage period of ***,terbinafine could be an antifungal preservative for postharvest table grapes fresh-keeping.

关键词： Terbinafine Botrytis cinerea Antifungal activity Cell membrane Grape preservation

General synthesis of hollow mesoporous conducting polymers by dual-colloid interface co-assembly for high-energy-density micro-supercapacitors

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Journal of Energy Chemistry 2021年第11期30卷 145-152,I0004页

作者： Jing Cui Fei-Fei Xing Hao luo Jie-qiong Qin Yan Li Yonghui Zhong Facai Wei Jianwei Fu Chengbin Jing Jiangong Cheng Zhong-Shuai Wu Shaohua Liu state key {2. of Precision Spectroscopy and Department of Materials School of Physics and Electronic ScienceEast China Normal University500 Dongchuan RoadShanghai 200241China state key {2. of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina Dalian National laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina University of Chinese Academy of sciences 19 A Yuquan RoadShijingshan DistrictBeijing 100049China School of Chemistry and Molecular Engineering East China Normal University500 Dongchuan RoadShanghai 200241China School of Materials science and Engineering Zhengzhou University100 Science AvenueZhengzhou 450002HenanChina state key Lab of Transducer {2. Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences865 Changning RoadShanghai 200050China Shanghai Academy of Quality Management 258 Wuyi RoadShanghai 200050China

Rational design and precise regulation over the morphology, structure, and pore size of functional conducting mesoporous polymers with enriched active sites and shorten electron–ion transport pathway are extremely important for developing high-performance micro-supercapacitors (MSCs), but still remain a great challenge. Herein, a general dual-colloid interface co-assembly strategy is proposed to fabricate hollow mesoporous polypyrrole nano-bowls (mPPy-nbs) for high-energy-density solid-state planar MSCs. By simply adjusting the size of block copolymer micelles, the diameter of polystyrene nanospheres and the amount of pyrrole monomer, mesopore size of the shell, void and shell thickness of mPPy-nbs can be simultaneously controlled. Importantly, this strategy can be further utilized to synthesize other hollow mesoporous polymers, including poly(tris(4-aminophenyl)amine), poly(1,3,5-triaminobenzene) and their copolymers, demonstrative of excellent universality. The structurally optimized mPPy-nb exhibits high specific surface area of 12. m^(2. g^(−1)and large capacitance of 2.5 F g^(−1) at 1 mV s^(−1). Furthermore, the MSCs assembled by mPPy-nbs deliver impressive volumetric capacitance of 90 F cm^(−3) and energy density of 2.0 mWh cm^(−3), superior to the most reported polymers-based MSCs. Also, the fabricated MSCs present excellent flexibility with almost no capacitance decay under varying bending states, and robust serial/parallel self-integration for boosting voltage and capacitance output. Therefore, this work will inspire the new design of mesoporous conducting polymer materials toward high-performance microscale supercapacitive devices.

关键词： Interface co-assembly Dual-colloids Mesopore Hollow nano-bowl Micro-supercapacitors

Furostanol Saponins from Asparagus cochinchinensis and Their Cytotoxicity

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Natural Products and Bioprospecting 2021年第6期11卷 651-658页

作者： Ruo-Song Zhang Yang-Yang Liu Pei-Feng Zhu qiong Jin Zhi Dai Xiao-Dong luo state key {2. of Phytochemistry and Plant Resources in West{2. and Yunnan key {2. of Natural Medicinal Chemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of sciences Beijing 100049China key laboratory of Medicinal Chemistry for Natural Resource Ministry of EducationYunnan Provincial Center for Research&Development of Natural ProductsSchool of Chemical Science and TechnologyYunnan UniversityKunmingChina

Phytochemical investigation on the roots of Asparagus cochinchinensis led to the isolation of one new furostanol saponin,named 2.-O-β-d-glucopyranosyl-2.α-hydroxyl-(2.R)-Δ5(6)-furost-3β,2.-diol-3-O-α-l-rhamnopyranosyl-(1→2.-[β-d-glucopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→4)]-β-d-glucopyranoside(1),along with three known congeners(2.4).The structure of new saponin was elucidated via comprehensive inspection of its HRMS and NMR spectral data as well as chemical technology,whereas those of known ones were identified by comparison of their NMR and MS spectral data with those reported in *** isolated saponins were evaluated for their cytotoxic effects on two human liver(MHCC97H)and lung adenocarcinoma(H12.9)cancer cells in *** them,both 1 and 2.showed significant cytotoxicity against above mentioned cell *** studies revealed that these two saponins could significantly inhibit their proliferation of MHCC97H and H12.9 cells.

关键词： Steroid saponins Asparagus cochinchinensis Cytotoxicity Structural elucidation