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Surface engineering towards high-energy carbon cathode for advanced aqueous zinc-ion hybrid capacitors

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Chinese Chemical Letters 2023年第8期34卷 356-359页

作者： Xingyuan Gao Huilin Deng Yuanbin Fang yuyan li Xihong Lu Faculty of Chemistry and Material Science Guangdong University of EducationEngineering Technology Development Center of Advanced Materials&Energy Saving and Emission Reduction in Guangdong Colleges and UniversitiesGuangzhou 510303China MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem&Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Opportunities coexist with challenges for the development of carbon-based cathodes with a high energy density applied for zinc ion hybrid capacitors(ZIHCs).In the present study,a facile and effective surface engineering approach is demonstrated to greatly improve the energy storage ability of commercial carbon paper(CP)in *** from the introduced oxygen functional groups,larger surface area and improved surface wettability upon air calcination,the assembled aqueous ZIHC with the functionalized carbon paper(FCP)exhibits a much higher areal capacity of 0.22 mAh/cm^(2)at 1 mA/cm^(2),outperforming the counterpart with blank CP by over 5000 *** importantly,a superior energy density and power density of 130.8μWh/cm^(2)and 7460.5μW/cm^(2),are respectively ***,more than 90%of the initial capacity is retained over 10000 *** surface engineering strategy to improve the energy storage capability is potentially applicable to developing a wide range of high-energy carbon electrode materials.

关键词： Zinc ion hybrid capacitor Carbon cathode Air activation Pseudocapacitance Surface engineering

The GATA transcription factor TaGATA1 recruits demethylase TaELF6-A1 and enhances seed dormancy in wheat by directly regulating TaABI5

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Journal of Integrative Plant Biology 2023年第5期65卷 1262-1276页

作者： Xuening Wei yuyan li Xiuliang Zhu Xin liu Xingguo Ye Miaoping Zhou Zengyan Zhang The National Key Facility for Crop Gene Resources and Genetic Improvement/Key Laboratory of Biology and Genetic Improvement of Triticeae Crops Ministry of AgricultureInstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China JiangsuAcademyofAgricultural Sciences Nanjing210014China

Seed dormancy is an important agronomic trait in crops, and plants with low dormancy are prone to preharvest sprouting(PHS) under high-temperature and humid conditions. In this study,we report that the GATA transcription factor TaGATA1 is a positive regulator of seed dormancy by regulating TaABI5 expression in *** results demonstrate that TaGATA1 overexpression significantly enhances seed dormancy and increases resistance to PHS in wheat. Gene expression patterns, abscisic acid(ABA) response assay, and transcriptome analysis all indicate that TaGATA1 functions through the ABA signaling pathway. The transcript abundance of TaABI5, an essential regulator in the ABA signaling pathway,is significantly elevated in plants overexpressing TaGATA1. Chromatin immunoprecipitation assay(ChIP) and transient expression analysis showed that TaGATA1 binds to the GATA motifs at the promoter of TaABI5 and induces its *** also demonstrate that TaGATA1 physically interacts with the putative demethylase TaELF6-A1, the wheat orthologue of Arabidopsis ***–qPCR analysis showed that H3K27me3 levels significantly decline at the TaABI5 promoter in the TaGATA1-overexpression wheat line and that transient expression of TaELF6-A1 reduces methylation levels at the TaABI5 promoter, increasing TaABI5 expression. These findings reveal a new transcription module, including TaGATA1–TaELF6-A1–TaABI5, which contributes to seed dormancy through the ABA signaling pathway and epigenetic reprogramming at the target site. TaGATA1 could be a candidate gene for improving PHS resistance.

关键词： ABSCISIC ACID INSENSITIVE5(ABI5) common wheat demethylase GATA transcription factor preharvest sprouting seed dormancy

Effectiveness of Qiangjijianli capsule on experimental autoimmune myasthenia gravis

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Neural Regeneration Research 2006年第7期1卷 638-641页

作者： Shunmin li Bo Fu yuyan li Dong Yang Shudong Yang First Department of Internal Medicine Shenzhen Hospital of Traditional Chinese MedicineShenzhen 518033Guangdong ProvinceChina

BACKGROUND:Experimental autoimmune myasthenia gravis(EAMG)and anti-AchR antibody of human myasthenia gravis are the same immune *** antibody restricts the activity of nicotinic acetylcholine receptor and the amount of receptor binding sites is decreased,so myasthenia gravis ***:To observe the therapeutic effect and mechanism of action of Qiangjijianli capsule on EAMG ***:A randomized controlled animal ***:Experimental Animal Center of Guangzhou University of Traditional Chinese ***:Acetylcholine receptors(AchR)were extracted from electric skate's electric organ which lives in the sea near *** had high biological activity and the protein content was 1.63 g/*** capsule(Astragalus mongholicus,Codonopsis pilosula,Atractylodes macrocephala,Angelica sinensis,Bupleurum chinense,Cairo morningglory root or leaf,Glycyrrhiza uralensis,etc.0.5 g crude drug per capsule)was bought from the Manufacturing Laboratory of Guangzhou University of Traditional Chinese Medicine with the Batch ***:This experiment was carried out in the Experimental Animal Center of Guangzhou University of Traditional Chinese Medicine from May to August 1990.①Adult female SD rats were immunized with *** animals'movement condition was observed and recorded *** rats were chosen as normal control group,and they were not given any treatment and raised *** modeled,20 successful rats were randomly assigned into 2 groups:treatmental group and model group.2 mL Qiangjijianli capsule suspension(1 g)was intragastrically administrated into each rat of treatmental group for 30 days;The same amount of clean water was intragastrically administrated into the rats of model group for 30 days.②Serum AchR antibody was measured with ABC-EliSA *** administration,the rats were *** complete diaphragmatic muscle was extracted for in vitro receptor binding *** constitution of N-AchR per m

关键词： AchR EAMG

Synthesis,structure and properties of three novel transition-metal-containing tantalum-phosphate clusters

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Chinese Chemical Letters 2022年第10期33卷 4675-4678页

作者： Xue li Hui Zhao yuyan li Yuanyuan Yang Mingyang Zhang Suyi liu Pengtao Ma Jingping Wang Jingyang Niu Henan Key Laboratory of Polyxometalate Chemistry College of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China

Peroxide ligation of aqueous metal-oxo clusters provides rich speciation and structural ***,three novel transition-metal derivatives of polyoxometalate anions,[Ni_(2)(H_(2)O)_(10){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(6-)(1a),[Zn(H_(2)O)_(4){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(8-)(2a)and[Cd(H_(2)O)_(4){P_(4)Ta_(6)(O_(2))_(6)O_(24)}]^(8-)(3a),have been successfully synthesized by adopting a one-pot reaction *** of these hexatantalates are built from a new-type phosphorus-incorporated *** investigated the solution behaviors,and the peak assignments of the MS spectra indicated some degree of stability of them in ***,the proton-conducting ability of compound 1a was also explored and it has shown well conductivity at high relative humidities,with conductivity achieved 1.22×10^(-3) S/cm(85℃,90%RH).

关键词： Polyoxotantalates Transition-metal Synthesize Structure Proton-conduction

Bioinspired mineral-in-shell nanoarchitectonics:Functional empowerment of mineral precursors for guiding intradentinal mineralization

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Nano Research 2024年第5期17卷 4338-4349页

作者： Xiaoran Zheng Yang liu Mingjing li yuyan li Wanshan Gao Rongmin Qiu Jiaqi Xing Jiaojiao Yang Yantao Chen Xinyuan Xu Mingming Ding Jun Luo Jianshu li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China College of Stomatology Hospital of Stomatology Guangxi Medical UniversityGuangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and ReconstructionGuangxi Clinical Research Center for Craniofacial DeformityGuangxi Key Laboratory of Oral and Maxillofacial Surgery Disease TreatmentGuangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious DiseasesNanning 530021China State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Med-X Center for Material Sichuan UniversityChengdu 610041China

Effective mineralization of biological structures poses a significant challenge in hard tissue engineering as it necessitates overcoming geometric complexities and multistep biomineralization *** this regard,we propose“mineral-in-shell nanoarchitectonics”,inspired by the nanostructure of matrix vesicles,which can influence multiple mineralization *** nanostructural design empowers mineral precursors with tailorable properties through encapsulating amorphous calcium phosphate within a multifunctional tannic acid(TA)and silk fibroin(SF)*** bioinspired nanosystem facilitates efficient recruitment of mineral precursors throughout the dentin structures,followed by large-scale intradentinal mineralization both in vitro and in vivo,which provides persistent protection against external *** simulations combined with experimental studies attribute the success of intradentinal mineralization to the TA-SF nanoshell,which exhibits a strong affinity for the dentin structure,stabilizing amorphous precursors and thereby facilitating concomitant mineral ***,this bioinspired mineral-in-shell nanoarchitectonics shows a promising prospect for hard tissue repair and serves as a blueprint for next-generation biomineralization-associated materials.

关键词： mineral-in-shell nanohybrids self-assembly biomineralization dentinal tubule occlusion dental hypersensitivity

密度和形状因子变化时金属橡胶材料的本构关系

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航空学报 2008年第4期29卷 1084-1090页

作者：李宇燕黄协清西安工业大学机电工程学院陕西西安710032 西安交通大学机械工程学院陕西西安710049

以多孔材料理论为基础,干摩擦非线性理论为依据,并结合小曲梁模型建立了金属橡胶材料的非线性本构关系,通过对14种密度和形状因子都不同的空心圆柱形金属橡胶材料做力与位移关系试验,并对试验数据进行拟合,得到了非线性本构关系模型中... 详细信息

以多孔材料理论为基础,干摩擦非线性理论为依据,并结合小曲梁模型建立了金属橡胶材料的非线性本构关系,通过对14种密度和形状因子都不同的空心圆柱形金属橡胶材料做力与位移关系试验,并对试验数据进行拟合,得到了非线性本构关系模型中的各项系数值、材料的密度、材料的形状因子三者之间的变化关系式。由该关系式可知,当材料的密度和形状因子同时发生变化时,已知一种金属橡胶材料的密度和形状因子,就可预估该材料的各项系数值,从而就可预估金属橡胶材料在密度和形状因子同时发生变化情况下的非线性本构关系。最后从14种试件以外取2种金属橡胶试件进行算例验证,证明所采用的预估金属橡胶材料在密度和形状因子同时发生变化时的非线性本构关系的方法是合理的、有效的。

关键词：金属橡胶材料多孔材料理论非线性本构关系形状因子密度

Cause Analysis of Flat Concave Defects on the Inner Surface at the end of T91 Alloy-Steel Tubes

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Cause Analysis of Flat Concave Defects on the Inner Surface ...

作者： Zhenguo Sun yuyan li Fei li Jun Ye Jiangsu Province Special Equipment Safety Supervision Institute Wuxi Branch

The concave defects on the inner surface at the end of T91 alloy-steel tubes were analysed by macroscopic morphology analysis, electron microscope scanning and energy spectrum analysis, metallographic analysis and anion analysis of corrosion products. The composition of water sample and oil sample of finned winding and oil immersion treatment was also analysed. It was found that this kind of defect was not caused by the preservation environment of steel tube, the treatment of finned winding and oil immersion. The defect should be related to the quality of steel tube blank or the processing technology of steel tube.

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铁合金和青铜多孔材料屈服应力的实验研究

应用力学学报 2005年第4期22卷 541-544页

作者：李宇燕黄协清西安交通大学西安710049

对铁合金和青铜多孔材料做静态实验和Taylor冲击实验,得到静态屈服应力和孔隙率以及动态屈服应力和应变率的变化规律,同时将静动态载荷作用下的多孔材料的本构方程与实验结果进行了对比,发现理论分析和实验研究有良好的一致性,表明本文... 详细信息

对铁合金和青铜多孔材料做静态实验和Taylor冲击实验,得到静态屈服应力和孔隙率以及动态屈服应力和应变率的变化规律,同时将静动态载荷作用下的多孔材料的本构方程与实验结果进行了对比,发现理论分析和实验研究有良好的一致性,表明本文采用的模型基本能满足实际工程应用。

关键词：屈服应力 Taylor实验孔隙率应变率

Discussion on the Measurement Method for the Coda Wave Quality Factor

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Earthquake Research in China 2009年第4期23卷 420-433页

作者： liu Xiqiang Shi yuyan Qu Junhao li Hong li Bo Zhang Kun Earthquake Administration of Shandong Province Jinan 250014 China

The Quality factor is the parameter that can be used to describe the energy attenuation on seismic wave. In theory, we can obtain the relationship between the change of the coda wave quality factor with time and the strong earthquake preparation process on the basis of the quality factor of a coda wave in a same ray path. However, in reality the coda wave quality factor measured by different seismic coda waves corresponds to different seismic wave ray paths. The change of the quality factor with time is related to non-elastic characteristics of the medium and the volume of scattering ellipsoid constrained by scattered wave phase fronts, besides the change of regional stress field. This paper discusses the relationship between quality factor, epicenter distance and different lapse time, and then discusses the relationship between quality factor and frequency. Furthermore the determination method of the coda wave quality factor is put forward. The improved determination method of the quality factor, which removes the influence of different earthquakes or propagation depth of scattered waves, may increase measurement precision, thus information pertaining to abnormal changes in quality factor and the relationship between the quality factor and earthquake preparation process can be acquired.

关键词： Quality factor Coda wave Measurement method Discussion Application