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Performance optimization of chalcogenide catalytic materials in lithium-sulfur batteries:Structural and electronic engineering

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Chinese Chemical Letters 2024年第7期35卷 147-166页

作者： Jianmei Han Peng Wang Hua Zhang Ning song Xuguang An Baojuan xi Shenglin xiong College of Chemistry and Chemical Engineering Taishan UniversityTai'an 271021China Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJi'nan 250100China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

Lithium-sulfur batteries(LSBs)boasting remarkable energy density have garnered significant attention within academic and industrial ***,the progression of LSBs remains constrained by the languid redox kinetics intrinsic to sulfur and the pronounced shuttle effect induced by lithium polysulfides(Li PSs),which seriously affecting the energy density,cycling life and rate *** conceptualization and implementation of catalytic materials stand acknowledged as a propitious stratagem for orchestrating kinetic modulation,particularly in excavating the conversion of LiPSs and has evolved into a focal point for *** them,chalcogenide catalytic materials(CCMs)have shown satisfactory catalytic effects ascribe to the unique physicochemical properties,and have been extensively developed in recent *** the lack of systematic summary regarding the development of CCMs and corresponding performance optimization strategies,herein,we initiate a comprehensive review regarding the recent progress of CCMs for effective collaborative immobilization and accelerated transformation kinetics of Li *** that,the modulation strategies to improve the catalytic activity of CCMs are summarized,including structural engineering(morphology engineering,surface/interface engineering,crystal engineering)and electronic engineering(doping and vacancy,etc.).Finally,the application prospect of CCMs in LSBs is clarified,and some enlightenment is provided for the reasonable design of CCMs serving practical LSBs.

关键词： Lithium-sulfur batteries Chalcogenide Catalytic materials Lithium polysulfides Structural engineering Electronic engineering

Update Knowledge Assessment and Influencing Predictor of Female Fertility Preservation in Oncologists

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Current Medical Science 2022年第4期42卷 824-831页

作者： Li-xia ZHU Lei JIN Jing-hang JIANG Liu YANG Zi-shui FANG Meng WANG Ying xiAO Qing-song xi Reproductive Medicine Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Reproductive Medicine Center Jingmen Second People's HospitalJingmen 448000China Cancer Center Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

Objective:This study aims to offer an update assessment of the knowledge of Chinese oncologists on female fertility preservation,and identify the determinants that influence the implementation of fertility ***:A total of 713 Chinese oncologists with different specialties completed the online self-report questionnaire to assess their understanding of fertility risks in cancer treatment,knowledge on female fertility preservation,and perceptions on the barriers in referring patients for fertility ***:Although most oncologists were familiar with fertility risk in cancer treatment,half of them lacked the knowledge for reproduction and preservation *** the multivariable model,oncologists in a hospital with a specialized reproductive institution,positive precaution for fertility risk,and fertility preservation discussion with patients were significantly correlated with the possibility of fertility preservation ***:The intervention targets based on the update evaluation and identified influencing determinants will be helpful for all the oncofertility researchers,oncologists and institutions in future efforts for well-established female fertility preservation services.

关键词： fertility preservation oncologists female infertility neoplasms

A gas sensing neural circuit for an olfactory neuron

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Communications in Theoretical Physics 2024年第10期76卷 26-40页

作者： xi-Kui Hu song Zhu Juan Yang Zhao Yao Ping Zhou Jun Ma School of Science Chongqing University of Posts and Telecommunications School of Physics and Electronics Central South University Department of Physics Lanzhou University of Technology

A gas sensor can convert external gas concentration or species into electric voltage or current signals by physical adsorption or chemical changes. As a result, a gas sensor in a nonlinear circuit can be used as a sensitive sensor for detecting external gas signals from the olfactory system. In this paper, a gas sensor and a field-effect transistor are incorporated into a simple FithzHugh–Nagumo neural circuit for capturing and encoding external gas signals. An improved functional neural circuit is obtained, and the effect of gas concentration, gas species and neuronal activity can be discerned as the gate voltage, threshold voltage and activation coefficient of the field-effect transistor, respectively. The gas concentration can affect the neural activities from quiescent to normal working and, finally, to saturation state in bursting, spiking, periodic and chaotic firings with different frequencies. The effects of gas species and neuronal activity on the firing state can also be achieved in this functional neural circuit. In addition, variations in the gate voltage, threshold voltage and activation coefficient can cause switching between different firing modes. These results can be helpful in designing artificial olfactory devices for bionic gas recognition and other coupled systems arising in applied sciences.

关键词： bifurcation field-effect transistor gas sensor olfactory neural circuit

Thermal Buckling and Post-Buckling Behavior of Pined-Fixed Beams on Nonlinear Elastic Foundation

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Thermal Buckling and Post-Buckling Behavior of Pined-Fixed B...

Recent advances in electrocatalytic generation of indole-derived radical cations and their applications in organic synthesis

2007国际机械工程与力学会议

作者： xi song Shirong LI Department of Engineering Mechanics Lanzhou University of Technology

In this article, both thermal buckling and post-buckling of pinned-fixed beams resting on an elastic foundation are investigated. Based on the accurate geometrically nonlinear theory for Euler-Bernoulli beams, considering both linear and nonlinear elastic foundation effects, governing equations for large static deformations of the beams subjected to uniformly temperature rise are derived. Due to large deformation of the beam, the constraint forces of elastic foundation in both longitudinal and transverse directions are taken into account. The boundary value problem for the nonlinear ordinary differential equations is solved effectively by using the shooting method. Characteristic curves of critical buckling temperature versus elastic foundation stiffness parameter corresponding to the first, the second and the third buckling mode shapes are plotted. From these figures it can be found that these curves have no intersection point in the range of 1 K ≤ 3000, which is different from the behaviors of symmetrically supported beams （pinned-pinned and fixed-fixed）. However, there still exist mode transition points. As is expected , nonlinear foundation stiffness parameter 2 K has no influence on the critical buckling temperature and also has little effect on the post-buckling temperature comparing with the 1 K linear parameter.

关键词： Beam Elastic Foundation Thermal buckling Mode transition Numerical results

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Chinese Chemical Letters 2024年第4期35卷 106-123页

作者： Wei Zhou xi Chen Lin Lu xian-Rong song Mu-Jia Luo Qiang xiao Key Laboratory of Organic Chemistry of Jiangxi Province Jiangxi Science&Technology Normal UniversityNanchang 330013China

Indole-derived radical cations, open-shell reactive species, display distinctive dual reactivity due to the carbon-centered radical and more electrophilic carbocation, which frequently appear in a variety of single electron oxidation reactions for synthesizing structurally diverse functionalized indoles and indolines. Electrocatalysis is considered as a synthetically attractive and environmentally friendly alternative for driving the single electron oxidation of indoles. Remarkable achievements in electrocatalytic indolederived radical cation-mediated indole functionalization have been realized so far. This review comprehensively summarizes the recent progresses in the applications of electrocatalytic indole radical cations,including C(sp~2)–H functionalization, dearomative 2,3-difunctionalization, and ring-opening reaction, emphasizing the vital single electron oxidation steps of indoles, the substrates scope and limitations, and the reaction mechanisms.

关键词： Electrocatalysis Indole radical cation C-H functionalizatin Dearomative 2 3-difunctionalization

Uniaxial stress influence on lattice,band gap and optical properties of n-type ZnO:first-principles calculations

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Chinese Physics B 2012年第1期21卷 399-403页

作者： Yang Ping Li Pei Zhang Li-Qiang Wang xiao-Liang Wang Huan song xi-Fu xie Fang-Wei Laboratory of Advanced Manufacturing&Reliability for MEMS/NEMS/OEDS School of Mechanical EngineeringJiangsu UniversityZhenjiang 212013China

The lattice, the band gap and the optical properties of n-type ZnO under uniaxial stress are investigated by first- principles calculations. The results show that the lattice constants change linearly with stress. Band gaps are broadened linearly as the uniaxial compressive stress increases. The change of band gap for n-type ZnO comes mainly from the contribution of stress in the c-axis direction, and the reason for band gap of n-type ZnO changing with stress is also explained. The calculated results of optical properties reveal that the imaginary part of the dielectric function decreases with the increase of uniaxial compressive stress at low energy. However, when the energy is higher than 4.0 eV, the imaginary part of the dielectric function increases with the increase of stress and a blueshift appears. There are two peaks in the absorption spectrum in an energy range of 4.0-13.0 eV. The stress coefficient of the band gap of n-type ZnO is larger than that of pure ZnO, which supplies the theoretical reference value for the modulation of the band gap of doped ZnO.

关键词： uniaxial stress first-principles optical properties n-type ZnO

PROPERTIES AND MORPHOLOGY OF UNSATURATED POLYESTER/ACRYLATE-TERMINATED POLYURETHANE/ORGANO-MONTMORILLONITE NANOCOMPOSITES

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Chinese Journal of Polymer Science 2005年第5期23卷 471-478页

作者： Chang-jiang You Jin-guo Xu song xi xiao-xia Duan Jie Shen and De-min Jia College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China College of Materials Science and Engineering South China University of Technology Guangzhou 510640

Unsaturated polyester resin （UPR）/acrylate-terminated polyurethane （ATPU）/organo-modified montmorillonite （OMMT） nanocomposites were prepared by the in situ intercalative polymerization method. Samples were prepared by the sequential mixing, i.e. mixture of the ATPU and styrene （S） and OMMT were prepared in the first step; UPR was then added to the pre-intercalates of ATPU/S/OMMT. Results indicate that the mechanical properties and thermal properties of UPR/ATPU/OMMT nanocomposites greatly depend on the amount of ATPU and OMMT. Results show that the addition of ATPU could increase the impact strength of UPR/ATPU composites, but the tensile strength, flexural strength and heat resistance of the materials are obviously decreased. When the weight ratio between UPR, ATPU and OMMT were 82：15：3, the impact strength and heat distortion-temperature of nanocomposite were greatly improved, meanwhile there was little change for other properties of the nanocomposites. The synergistic enhancement effects of ATPU and OMMT on the composites were observed. The structures and morphology of the composites were investigated by X-ray diffraction, scanning electron microscopy and transmission electron microscopy.

关键词： Unsaturated polyester Acrylic terminal polyurethane Organo-modified montmorillonite Nanocomposite.

Identification of QTLs for Branch Number in Oilseed Rape(Brassica napus L.)

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Journal of Genetics and Genomics 2014年第10期41卷 557-559页

作者： Jinsong Xu xi song Yong Cheng xiling Zou Liu Zeng xing Qiao Guangyuan Lu Guiping Fu Zhen Qu Xuekun Zhang Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences

Oilseed rape （Brassica napus L.） is one of the most important oil crops worldwide and provides about 50 percent of the vegetable oil supply in China （Yin et al., 2009）. The development of rapeseed varieties with higher yield is an effective measure to optimize balance between the supply and demand of edible vegetable oil. In oilseed rape, the number of silique per plant （SP） contributes most to the yield performance （Diepenbrock, 2000）. However, compared with the other two yield-component traits, seeds per silique （SS） and seed weight （SW）, SP is more sensitive to environmental changes （Li et al., 2007; Shi et al., 2009）. Therefore, it is difficult to perform the genetic improvement on SP trait directly in oilseed rape.

关键词： QTLs Identification of QTLs for Branch Number in Oilseed Rape Brassica napus L

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聚氨酯泡沫塑料固定氨基酰化酶Ⅰ的研究

浙江大学学报（工学版） 2005年第4期39卷 562-564,594页

作者：宋锡瑾王杰浙江大学化学工程与生物工程系浙江杭州310027 浙江大学化学系浙江杭州310027

以聚醚多元醇和甲苯二异氰酸酯(TDI)为原料,选用氨基酰化酶I作为模型酶,采用一步发泡法,将酶固定在软质聚氨酯泡沫塑料(FPUF)上,并对其进行表征.研究结果表明,在发泡过程中加入一定量的惰性蛋白质,对酶蛋白有一定的屏蔽效果,降低了被TD... 详细信息

以聚醚多元醇和甲苯二异氰酸酯(TDI)为原料,选用氨基酰化酶I作为模型酶,采用一步发泡法,将酶固定在软质聚氨酯泡沫塑料(FPUF)上,并对其进行表征.研究结果表明,在发泡过程中加入一定量的惰性蛋白质,对酶蛋白有一定的屏蔽效果,降低了被TDI损伤的概率,客观上对酶分子起到保护作用,使固定化后的酶活力收率有所提高.测得FPUF对蛋白质的负载率高达100%,固定化酶活力收率为81.03%,该固定化酶的最适pH值为6.8,与最适pH值为7的酶液相比,略向酸性偏移;最适反应温度与游离酶相似,在50～70℃.将固定化酶用于拆分乙酰-DL-甲硫氨酸的试验,体现了较好的连续使用稳定性,其半衰期为404.3 min.

关键词：聚氨酯泡沫塑料氨基酰化酶Ⅰ 固定化乙酰-DL-甲硫氨酸