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Internal electric field modulation by copper vacancy concentration of cuprous sulfide nanosheets for enhanced selective CO_(2) photoreduction

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Journal of Energy Chemistry 2024年第4期91卷 324-330页

作者： xian Shi weidong Dai Xiaoqian Li Yang Bai Qin Ren Yao Lei Xing'an Dong School of Chemistry and Environmental Engineering Sichuan University of Science&EngineeringZigong 643000SichuanChina State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation School of Oil&Natural Gas EngineeringSouthwest Petroleum UniversityChengdu 610500SichuanChina Chongqing Key Laboratory of Photo-Electric Functional Materials College of Physics and Electronic EngineeringChongqing Normal UniversityChongqing 401331SichuanChina Research Center for Environmental and Energy Catalysis Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731SichuanChina

Although the internal electric field(IEF)of photocatalysts is acknowledged as a potent driving force for photocharge separation,modulating the IEF intensity to achieve enhanced photocatalytic performances remains a challenge.Herein,cuprous sulfide nanosheets with different Cu vacancy concentration were employed to study IEF modulation and corresponding direct charge transfer.Among the samples,Cu_(1.8)S nanosheets possessed intensified IEF intensity compared with those of Cu_(2)S and Cu_(1.95)S nanosheets,suggesting that an enhanced IEF intensity could be achieved by introducing more Cu vacancies.This intensified IEF of Cu_(1.8)S nanosheets induced numerous photogenerated electrons to migrate to its surface,and the dissociative electrons were then captured by Cu vacancies,resulting in efficient charge separation spatially.In addition,the Cu vacancies on Cu_(1.8)S nanosheets accumulated electrons as active sites to lower the energy barrier of rate-determining step of CO_(2)photoreduction,leading to the selective conversion of CO_(2)to CO.Herein,the manipulation of IEF intensity through Cu vacancy concentration regulation of cuprous sulfide photocatalysts for efficient charge separation has been discussed,providing a scientific strategy to rationally improve photocata lytic performances for solar energy conversion.

关键词： Internal electric field intensity Cuprous sulfide photocatalysts Cu vacancies Charge separation Selective CO_(2) photoreduction

Analysis on Stiffness and Damping Performance of Active Magnetic Bearing System

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Advances in Manufacturing 1998年第3期 51-55页

作者： Wang Xiping Yu Liang (Shanghai University) Wan Jingui Cui weidong (xian Jiaotong University)

The relations of the stiffness and damping performance to the structure parameters of an active magnetic bearing (AMB) system and the frequency specificity of the control loop are analyzed. The effects of the control current phase on the stability, the stiffness and the damping properties of the system are presented.Meanwhile,a new concept of complex damping coefficient,the practical meanings of some system properties, and the calculation methods are discussed and described.

关键词： AMB system complex stiffness coefficient complex damping coefficient controller frequency specificity

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开滦煤业公司物探体系的构建与展望

煤炭与化工 2016年第1期39卷 128-130页

作者：冼伟东开滦集团煤业公司地测部河北唐山063018

简述了我国矿井物探的发展概况,对开滦煤业公司物探应用现状进行了研究分析,统计分析了各类物探技术在煤矿安全生产的应用效果,提出了矿区物探体系构建设想及在实施过程中需要开展的工作,对物探技术在矿区的应用和发展提出了新的展望。

关键词：矿井物探应用效果物探体系

Tensile stress enhanced dynamic oxygen vacancies on interlayer stretched Bi_(2)O_(2)CO_(3) as pivotal knobs to promote sustainable selective CO_(2) photoreduction

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能源化学:英文版 2023年第8期83卷 173-179,I0006页

作者： xian Shi weidong Dai Xing'an Dong Qin Ren Ping Yan Fan Dong School of Chemistry and Environmental Engineering Sichuan University of Science&EngineeringZigong 643000SichuanChina Research Center for Carbon-Neutral Environmental&Energy Technology Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731SichuanChina State Centre for International Cooperation on Designer Low-Carbon and Environmental Materials(CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou450001HenanChina College of Architecture and Environment Sichuan UniversityChengdu 610065SichuanChina

Surface oxygen vacancies(OVs) with abundant localized electrons on bismuth-oxygen based photocatalysts are proved to have the ability to capture and activate CO_(2).However,the surface OVs are easily filled with oxygen-containing species and destroyed,losing their effects as active sites and hindering the subsequent CO_(2)photoreduction.For realistic and sustainable CO_(2)photoreduction,constructing sustainable and stable surface OVs as active sites on photocatalysts is essential.This work shows the synthesis of interlayer stretched Bi_(2)O_(2)CO_(3) ultrathin nanosheets with tensile stress,which are beneficial to continuously generating light-induced dynamic OVs.With sufficient active sites,excellent,stable,and selective photoreduction of CO_(2)to CO under simulated solar light is achieved.The light-induced OVs can reduce the energy barrier of rate-determining step,resulting in the 100% product selectivity.The results presented herein demonstrate the effect of dynamic OVs induced by interlayer tensile strain on catalysts for the enhanced selective CO_(2)photoreduction process.

关键词： Ultrathin Bi_(2)O_(2)CO_(3) Dynamic oxygen vacancies Product selectivity Charge transfer CO_(2) phororeduction

从《伤寒论》方证角度探讨柴胡类方对甲状腺功能亢进症的治疗

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中医药临床杂志 2024年第1期36卷 23-27页

作者：鲜雨岑张紫娟周卫东湖南中医药大学湖南长沙410208 湖南省长沙市中医医院湖南长沙410100 湖南中医药大学第一附属医院湖南长沙410007

甲状腺功能亢进症属于中医“瘿病”范畴。中医基础理论认为,人体气血津液运行障碍,阻于少阳经脉,致气、痰、瘀结于颈前,壅郁化火,成结成肿,导致甲状腺功能亢进症的发生与发展。文章试以《伤寒论》中小柴胡汤为代表的一类方剂,从“和解少... 详细信息

甲状腺功能亢进症属于中医“瘿病”范畴。中医基础理论认为,人体气血津液运行障碍,阻于少阳经脉,致气、痰、瘀结于颈前,壅郁化火,成结成肿,导致甲状腺功能亢进症的发生与发展。文章试以《伤寒论》中小柴胡汤为代表的一类方剂,从“和解少阳,畅达枢机”的论治角度,探讨甲状腺功能亢进症的发生机制,并通过梳理柴胡类方对于甲状腺功能亢进症的临床应用,为经方辨治甲状腺功能亢进症提供新思路与方法。

关键词：中医柴胡类方《伤寒论》甲状腺功能亢进症

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“生物学综合实验”的教学创新与实践

生物学杂志 2024年第2期41卷 120-125页

作者：夏险敖波石小杉付珊郭倩王卫东涂俊铭湖北师范大学生命科学学院生物学国家级实验教学示范中心黄石435002

“生物学综合实验”是湖北师范大学一门线下实验课,项目库内容涵盖动物、植物、微生物、生态、毒理、食品及多学科交叉的综合性项目化实验。“微生物硒纳米合成菌株的分离鉴定及生物硒纳米的应用”为项目库中一个实验项目。该项目以微... 详细信息

“生物学综合实验”是湖北师范大学一门线下实验课,项目库内容涵盖动物、植物、微生物、生态、毒理、食品及多学科交叉的综合性项目化实验。“微生物硒纳米合成菌株的分离鉴定及生物硒纳米的应用”为项目库中一个实验项目。该项目以微生物学(微生物分离、形态观察、发酵条件优化)和分子生物学(DNA提取、PCR扩增、测序分析)为基础,融入材料科学(生物材料提取和形貌分析)和环境化学(吸附动力学分析)相关学科知识,为本科生设计的一项研究型生物学综合实验。该实验内容进行学科交叉,助力知识融会贯通;贴近科研一线,促进创新型人才培养;自主设计实验方案,促进主动学习;强调过程考核,调动学习积极性。以该实验项目为例,结合课堂内外自身教学实际,探索“生物学综合实验”线下一流课程建设道路,以期进一步优化教学效果并持续改进。

关键词：一流本科课程生物学综合实验实验课微生物学

Surveillance and Response to Imported Malaria During the COVID-19 Epidemic—Anhui Province,China,2019–2021

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China CDC weekly 2022年第28期4卷 622-625页

作者： Tao Zhang Jingjing Jiang Xiaofeng Lyu xian Xu Shuqi Wang Zijian Liu Jianhai Yin weidong Li Anhui Provincial Center for Disease Control and Prevention HefeiAnhui ProvinceChina National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)National Health Commission Key Laboratory of Parasite and Vector BiologyWHO Collaborating Center for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghaiChina.

Summary What is already known about this topic?China was certified malaria-free on June 30,2021.However,imported malaria continuously threatens the effort to prevent re-establishment of malaria in China.What is added by this report?Measures such as international travel restrictions,entry quarantine,and screening in fever clinics during the coronavirus disease 2019(COVID-19)period were associated with a significant decrease of imported malaria cases in Anhui Province,a higher proportion of non-Plasmodium falciparum(non-P.falciparum)malaria reported infections,and a higher proportion of cases requiring medical attention at their initial visit.What are the implications for public health practices?It is necessary to be vigilant about imported malaria during the COVID-19 epidemic,especially for non-P.falciparum infections which are more difficult to detect,and to promote research,development,and introduction of more sensitive and specific point-ofcare detection methods for non-P.falciparum species.

关键词： Anhui travel imported

改进QuEChERS-气相色谱-质谱法测定不同脂肪含量牛奶中19种酯类风味物质

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现代食品科技 2024年第3期40卷 281-288页

作者：梁明胡均鹏陈荣桥冼燕萍吴玉銮白卫东戴航侯向昶广州质量监督检测研究院广州市食品安全风险动态监测与预警研究中心广州市食品安全检测技术重点实验室广东广州511447 仲恺农业工程学院轻工食品学院广东省岭南特色食品科学与技术重点实验室广东广州510225

采用改进 QuEChERS- 气相色谱 - 质谱法(GC-MS)技术测定不同脂肪含量牛奶中 19 种酯类风味物质,研究牛奶中酯类风味物质与脂肪含量的关系。样品中的酯类风味物质经乙腈提取和 PSA 净化,净化后的样液经滤膜过滤后采用气相色谱 - 质谱... 详细信息

采用改进 QuEChERS- 气相色谱 - 质谱法(GC-MS)技术测定不同脂肪含量牛奶中 19 种酯类风味物质,研究牛奶中酯类风味物质与脂肪含量的关系。样品中的酯类风味物质经乙腈提取和 PSA 净化,净化后的样液经滤膜过滤后采用气相色谱 - 质谱法测定。19 种酯类风味物质经 DB-FFAP 色谱柱分离,单离子监测模式测定,外标法定量。结果表明, 19 种酯类风味物质在 5.0~500.0 μg/L 质量浓度范围内具有很好的线性关系,相关系数均高于 0.999。通过牛奶样品的加标回收试验,19 种酯类风味物质的平均回收率在 74.7%~109.2% 之间,日内精密度(n=6)在 1.9%~8.5% 之间,方法检出限和定量限分别为 3.5~14.0 μg/kg 和 10.0~40.0 μg/kg。实际样品检测发现牛奶中检出的 δ- 葵内酯、γ- 十二内酯和 δ- 十二内酯的含量与脂肪含量正相关,且全脂纯牛奶>低脂纯牛奶>脱脂纯牛奶;此外,部分牛奶样品可能添加有香精香料,导致 γ- 壬内酯和 γ- 十一内酯的含量明显升高。该方法快速简便、准确度高、重现性好,可满足不同脂肪含量牛奶中 19 种酯类风味物质的检测要求。

关键词：酯类风味物质牛奶 QuEChERS 气相色谱-质谱法

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Optimal model establishment of whole-process management data for CAR-T therapy in China—how should this be done?

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Cellular & Molecular Immunology 2022年第1期19卷 122-124页

作者： Xiaolei Li Hanren Dai xian Li Ping Li Wenbin Qian Aibin Liang weidong Han Department of Bio-Therapeutics the First Medical CentreChinese PLA General HospitalBeijingChina Department of Oncology the First Affiliated Hospital of Anhui Medical UniversityHefeiChina Department of Hematology the Second Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiangChina Department of Hematology Tongji Hospital of Tongji UniversityShanghaiChina

Chimeric antigen receptor(CAR)T-cell therapy utilizes patients’own T lymphocytes that are engineered to attack cancer cells[1,2,3].With the US Food and Drug Administration(FDA)approval of four CD19-and one BCMA-targeted CAR therapy for B cell malignancies[4,5],CAR T-cell therapy has finally reached the status of a medicinal product.

关键词： CAR lymphocytes utilize