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Effects of surface chlorine atoms on charge distribution and reaction barriers for photocatalytic CO_(2)reduction

Nano materials Science 2024年第2期6卷 235-243页

作者： Wendong Zhang wenjun ma Yuerui ma Peng Chen Qingqing Ye Yi Wang Zhongwei Jiang Yingqing Ou Fan Dong Chongqing Key Laboratory of Green Synthesis and Application&Chongqing Key Laboratory of Inorganic Functional materials College of ChemistryChongqing Normal UniversityChongqing401331China Suzhou Industrial Technology Research Institute of Zhejiang University Jiangsu215000China Department of Chemistry Faculty of ScienceNational University of SingaporeSingapore117543Singapore Yangtze Delta Region Institute(Huzhou)&Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaHuzhou313001China

Photocatalytic CO_(2)reduction to produce high value-added carbon-based fuel has been proposed as a promising approach to mitigate global warming ***,the conversion efficiency and product selectivity are still low due to the sluggish dynamics of transfer processes involved in proton-assisted multi-electron *** the formation energy barriers of intermediate products is an effective method to enhance the selectivity and productivity of final *** this study,we aim to regulate the surface electronic structure of Bi_(2)WO_(6)by doping surface chlorine atoms to achieve effective photocatalytic CO_(2)*** Cl atoms can enhance the absorption ability of light,affect its energy band structure and promote charge *** with DFT calculations,it is revealed that surface Cl atoms can not only change the surface charge distribution which affects the competitive adsorption of H_(2)O and CO_(2),but also lower the formation energy barrier of intermediate products to generate more intermediate*COOH,thus facilitating CO ***,this study demonstrates a promising surface halogenation strategy to enhance the photocatalytic CO_(2)reduction activity of a layered structure Bi-based catalyst.

关键词： Surface chlorine atoms Charge distribution Reaction barriers Photocatalytic CO_(2)reduction Bi_(2)WO_(6)

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Higher intakes of lysine,threonine and valine are inversely associated with non-alcoholic fatty liver disease risk:a community-based case-control study in the Chinese elderly

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Food Science and Human Wellness 2024年第1期13卷 191-197页

作者： Xueqi Li wenjun ma Ting Yang Chong Wang Wei Zhang Hui Li Ting Zhao Xiaofei Guo Institute of Nutrition&Health School of Public HealthQingdao UniversityQingdao 260071China Affiliated Hospital of Qingdao University Qingdao 260071China

The associations of individual amino acid with non-alcoholic fatty liver disease(NAFLD)risk remained *** present study aimed to investigate the associations between the two in the Chinese ***:A community-based health check-up program was conducted in Qingdao,*** was diagnosed by ultrasonography accompanied by epidemiological *** dietary intakes of amino acids were investigated with 3-day,24-h dietary records and calculated by Nutrition Calculator *** cubic spline model was used to evaluate a nonlinear relationship between amino acid intake and NAFLD ***:400 NAFLD subjects were identified,and 400 participants were randomly selected as controls and matched by gender and age(±3 years)Dose-response analysis showed that 1000 mg increment of aromatic amino acids(AAAs)was associated with reduced 16%risk of *** increments of 750 mg/d threonine,950 mg/d valine,or 1700 mg/d lysine were associated with a 20%reduction in the NAFLD risk(all P for linearity<0.05).Conclusion:The present study demonstrated that the dietary increases in milk,eggs and deep-sea fish,which are rich in the amino acids,might contribute to protecting against NAFLD in the elderly.

关键词： Amino acid Non-alcoholic fatty liver disease Senior citizen Dose-response analysis

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Human radiological safety assessment for petawatt laser-driven ion acceleration experiments in CLAPA-T

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matter and Radiation at Extremes 2024年第4期9卷 8-15页

作者： Xiaopeng Zhang Jiarui Zhao Shengxuan Xu Xun Chen Ying Gao Shiyou Chen Kun Zhu Xueqing Yan wenjun ma State Key Laboratory of Nuclear Physics and Technology and Key Laboratory of HEDP of the Ministry of EducationCAPTPeking UniversityBeijing 100871China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsCASBeijing 100049China Beijing Laser Acceleration Innovation Center HuairouBeijing 101400China Institute of Guangdong Laser Plasma Technology BaiyunGuangzhou 510540China

The newly built Compact Laser Plasma Accelerator-Therapy facility at Peking University will deliver 60 J/1 Hz laser pulses with 30 fs *** by this petawatt laser facility,proton beams with energy up to 200 MeV are expected to be generated for tumor *** high-repetition operation,both prompt radiation and residual radiation may cause safety ***,human radiological safety assessment before commissioning is *** this paper,we simulate both prompt and residual radiation using the Geant4 and FLUKA Monte Carlo codes with reasonable proton and as-produced electron beam *** find that the prompt radiation can be shielded well by the concrete wall of the experimental hall,but the risk from residual radiation is nonnegligible and necessitates adequate radiation *** the basis of the simulation results,we discuss the constraints imposed by radiation safety considerations on the annual working time,and we propose radiation cooling strategies for different shooting modes.

关键词： laser prompt acceleration

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Peroxidase-like active Cu-ZIF-8 with rich copper(I)-nitrogen sites for excellent antibacterial performances toward drug-resistant bacteria

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Nano Research 2024年第8期17卷 7427-7435页

作者： Xiaoze Wang Hui Wang Jingkun Zhang Ning Han wenjun ma Donghai Zhang Mingshui Yao Xianliang Wang Yunfa Chen State Key Laboratory of Mesoscience and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of the Chinese Academy of Sciences Beijing 100049China Laboratory of Theoretical and Computational Nanoscience CAS Key Laboratory of Nanosystem and Hierarchial FabricationCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China

Bacterial pathogens pose a serious threat to human health,and there is an urgent need to develop highly effective antibacterial materials to eliminate the increasingly serious contamination of drug-resistant ***,a Cu-doped ZIF-8 particle with unsaturated copper exhibits high peroxidase-like activity.99.998%antibacterial efficiency against *** can be achieved for 30 min at a low concentration of 50μg·mL^(−1),as well as complete sterilization against ***(up to 8 log).99.999%antibacterial efficiency against Methicillin-resistant Staphylococcus aureus can be achieved,performing orders of magnitude higher than *** mechanism shows that the unsaturated Cu-Nx sites are enzyme-like active centers,which could promote the consumption of bacteria reducing substances by H_(2)O_(2),and the generated*OH further aggravates bacterial oxidative stress and membrane *** importantly,the oxidation activity of adsorbed oxygen species on Cu-ZIF-8 is enhanced by charge transfer and structural changes between the ligand and copper center like natural ***-doped ZIF-8 with peroxidase-like activity shows great potential in antibacterial application and the revealed catalytic mechanism is helpful for understanding the high antibacterial activity of nanoparticles with Cu-Nx sites.

关键词： Cu-doped ZIF-8 peroxidase-like reactive oxygen species(ROS) catalytic mechanism antibacterial activity

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Defining the We-map Reference Frames and Providing mathematical Expressions for Transformation Relations

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Journal of Geodesy and Geoinformation Science 2024年第3期7卷 76-88页

作者： WANG Xiaolong YAN Haowen WANG Zhuo ma wenjun YU Yitao College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Key Laboratory of Western China’s Environmental Systems Ministry of EducationLanzhou 730000China Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhou 730070China National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring Lanzhou 730070China Gansu Provincial Key Laboratory of Science and Technology in Surveying&mapping Lanzhou 730070China School of Resource and Environmental Sciences Wuhan UniversityWuhan 430072China

We-map is an interactive mobile map that can be easily communicated and applied on personal electronic devices,such as personal computers and mobile ***,the study of direction systems and coordinate systems is critical,and exploring reference frames is essential in direction and coordinate *** its significance,existing research on We-map lacks specific solutions for the exploration of reference frames is indispensable for the establishment of accurate direction and coordinate *** this paper,we endeavor to address this gap by elucidating the significance of We-map reference frames,defining them with mathematical constraints,summarizing their nature and characteristics,deriving their transformation relationships and representing them through mathematical formulars and *** work contributes to the fundamental theory of We-map and provides valuable systems and support for the mathematical foundation of We-map,map production,and platform ***,this research serves to advance the development of We-map.

关键词： We-map reference frames spatial direction relation coordinate system

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保淬透性结构钢的冶炼关键技术

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中国冶金 2024年第3期34卷 1-12页

作者：赵沛马文俊中国金属学会北京100081 首钢集团有限公司技术研究院北京100043

钢材淬透性对保证钢材的使用寿命、性能稳定性和工作安全具有重要意义。保淬透性钢材在制造、建筑、航空航天等领域中都有着重要的应用。围绕中国保淬透性结构钢的发展,梳理了其标准的演变,并以齿轮钢为例系统总结了保淬透性结构钢对淬... 详细信息

钢材淬透性对保证钢材的使用寿命、性能稳定性和工作安全具有重要意义。保淬透性钢材在制造、建筑、航空航天等领域中都有着重要的应用。围绕中国保淬透性结构钢的发展,梳理了其标准的演变,并以齿轮钢为例系统总结了保淬透性结构钢对淬透性、洁净度、带状组织、晶粒度和易切削性等冶金质量指标的要求;从低氧含量控制、成分精准控制和夹杂物控制等方面分析了齿轮钢冶炼过程关键控制技术,提出了冶炼及连铸过程关键控制要点。同时,对冶炼工艺流程进行了详细解析,分析了目前主流的两类冶炼工艺流程,即钙处理工艺流程和非钙处理工艺流程的特点。通过上述内容的梳理和分析,为所有保淬透性结构钢和冷镦钢等钢种的冶炼工艺选择提供借鉴。

关键词：淬透性结构钢齿轮钢冶炼技术夹杂物氧含量钙处理

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新兴湿法退役锂电池正极材料回收技术研究进展

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化工进展 2024年第4期43卷 2077-2090页

作者：马文君张旭刘孟顺梁志远西安交通大学热流科学与工程教育部重点实验室陕西西安710049

退役锂电池中的钴、镍、锂等稀有金属的绿色高效回收利用逐渐成为国内外研究的重点。传统酸浸法具有能源成本低、金属回收纯度高和效率高的优点,但使用腐蚀性强酸和昂贵萃取物,反应时间长且产生废酸、污泥和高盐溶液等二次废物。本文总... 详细信息

退役锂电池中的钴、镍、锂等稀有金属的绿色高效回收利用逐渐成为国内外研究的重点。传统酸浸法具有能源成本低、金属回收纯度高和效率高的优点,但使用腐蚀性强酸和昂贵萃取物,反应时间长且产生废酸、污泥和高盐溶液等二次废物。本文总结了传统酸浸法中绿色浸取剂和还原剂以及低共熔溶剂(DES)和超临界流体(SCF)两种新兴的湿法冶金技术对高效绿色回收锂电池正极材料的应用。阐明了微波超声辅助手段和选择性浸取回收工艺分别对改善浸取工况和简化分离回收程序的重要作用。并重点介绍了超临界水(SCW)和超临界二氧化碳(SC-CO_(2))两种超临界流体降解有机污染物、回收稀有金属并改善合成正极材料的应用,为高效、绿色、低成本回收退役锂电池中稀有金属提供了重要参考价值。

关键词：浸取超临界流体选择性回收湿法冶金锂电池低共熔溶剂

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神曲消食口服液联合乳酸菌素治疗小儿功能性消化不良的临床研究

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现代药物与临床 2024年第5期39卷 1247-1251页

作者：张静崔健马文军北京市大兴区人民医院北京102600

目的探讨神曲消食口服液联合乳酸菌素片治疗小儿功能性消化不良的临床疗效。方法选取2022年4月—2023年6月北京市大兴区人民医院收治的104例功能性消化不良患儿,采用随机数表法将患儿分为对照组(52例)和治疗组(52例)。对照组嚼服乳酸菌... 详细信息

目的探讨神曲消食口服液联合乳酸菌素片治疗小儿功能性消化不良的临床疗效。方法选取2022年4月—2023年6月北京市大兴区人民医院收治的104例功能性消化不良患儿,采用随机数表法将患儿分为对照组(52例)和治疗组(52例)。对照组嚼服乳酸菌素片,患儿<5岁,0.4 g/次;患儿≥5岁,0.8 g/次,3次/d。治疗组在对照组治疗基础上口服神曲消食口服液,患儿<5岁,5 mL/次;患儿≥5岁,10 m L/次,3次/d。两组均连续治疗2周。观察两组的临床疗效和中医症状改善时间,比较两组治疗前后功能性消化不良生存质量量表(FDDQL)评分及血清胃动素、神经肽Y水平。结果治疗后,治疗组总有效率为96.15%,显著高于对照组的84.62%(P<0.05)。治疗后,治疗组食少纳呆、脘腹痞闷、脘腹胀痛的改善时间均显著短于对照组(P<0.05)。治疗后,两组FDDQL评分均高于治疗前(P<0.05);且治疗组的FDDQL评分高于对照组(P<0.05)。治疗后,两组胃动素、神经肽Y水平均高于治疗前(P<0.05);且治疗后,治疗组胃动素、神经肽Y水平高于对照组(P<0.05)。结论神曲消食口服液联合乳酸菌素片治疗小儿功能性消化不良具有较好的治疗效果,可改善患儿的中医症状、生活质量及消化功能,并增加患儿食欲,且无明显不良反应。

关键词：神曲消食口服液乳酸菌素片功能性消化不良中医症状改善时间功能性消化不良生存质量量表评分血清胃动素神经肽Y

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Carbon nanotubes as outstanding targets for laser-driven particle acceleration

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Nano Research 2023年第11期16卷 12572-12578页

作者： wenjun ma State Key Laboratory of Nuclear Physics and Technology and Key Laboratory of HEDP of the Ministry of EducationCAPTPeking UniversityBeijing 100871China Beijing Laser Acceleration Innovation Center Beijing 101400China Institute of Guangdong Laser Plasma Technology Guangzhou 510540China

Under the irradiation of ultraintense laser pulses,targets made of gas,solid,or artificial materials can generate high-energy electrons,ions,and X-rays comparable to conventional accelerators or national light source *** and creating high-performance targets are the core problems for laser *** and nanomaterials can help to build ideal targets that do not exist in *** paper reviews the advances in exploiting carbon nanotubes as outstanding targets for laser-driven particle acceleration in memory of *** Xie,the inventor of the fabrication *** hope that the successful implementation of such targets in enhanced ion acceleration,high-efficiency electron acceleration,and brilliant X-ray generation could attract more interdiscipline interests and promote the development of this field.

关键词： laser acceleration laser-driven ion acceleration X-ray sources carbon nanotubes

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企业数据技术能力对市值和利润的影响——基于大数据专利的机制检验和互补性投入分析

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财贸经济 2024年第1期45卷 106-123页

作者：陈楠蔡跃洲马文君中国社会科学院数量经济与技术经济研究所 100732 中国社会科学院数量经济与技术经济研究所数字经济研究室 100732 国家工业信息安全发展研究中心 100040

数据技术能力是将原始数据资源转化为生产要素的前提和关键所在,直接影响上市企业的市值与利润。本文使用与数据采集、分析和应用相关的专利统计量表征企业数据技术能力,分析其对市值和利润的影响效果与机制。研究发现,企业数据技术能... 详细信息

数据技术能力是将原始数据资源转化为生产要素的前提和关键所在,直接影响上市企业的市值与利润。本文使用与数据采集、分析和应用相关的专利统计量表征企业数据技术能力,分析其对市值和利润的影响效果与机制。研究发现,企业数据技术能力可以带来显著的市场价值提升,但多数企业还无法将潜在价值转化为实际收益,可能对其长期市值产生负面影响。行业异质性分析表明,金融和批发零售企业所获得的市值提升最为显著,而工业企业则可能承受财务收益的负向影响。工业互联网供应商企业能够将数据技术能力转化为盈利手段,并辅之以研发人员投入、研发资本投入、政府补贴、IT基础设施等互补性投入,从而实现市值与利润的同步提升。为继续推动我国各类市场主体的数据开发利用,建议应注重提升企业数据技术能力,加大互补性投入,开发数据技术的应用场景和盈利模式,培育专业化的数据服务机构,推进数据要素市场机制及基础设施建设。

关键词：数据要素数据技术能力互补性投入大数据专利

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