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First-principles study on the heterogeneous formation of environmentally persistent free radicals(EPFRs)overα-Fe2O3(0001)surface:Effect of oxygen vacancy

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Journal of Environmental Sciences 2024年第8期142卷 279-289页

作者： Wenxiao Pan shuming he Qiao Xue Xian Liu Jianjie Fu Kang Xiao Aiqian Zhang State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environment Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310012China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of SciencesBeijing 101408China

Metal oxides with oxygen vacancies have a significant impact on catalytic activity for the transformation of organic pollutants in waste-to-energy(WtE)incineration *** study aims to investigate the influence of hematite surface oxygen point defects on the formation of environmentally persistent free radicals(EPFRs)from phenolic compounds based on the first-principles *** oxygen-deficient conditions were considered:oxygen vacancies at the top surface and on the *** simulations indicate that the adsorption strength of phenol on theα-Fe_(2)O_(3)(0001)surface is enhanced by the presence of oxygen ***,the presence of oxygen vacancies has a negative impact on the dissociation of the phenol molecule,particularly for the surface with a defective point at the top ***-kinetic parameters were established over a temperature range of300-1000 K,and lower reaction rate constants were observed for the scission of phenolic O-H bonds over the oxygen-deficient surfaces compared to the pristine *** negative effects caused by the oxygen-deficient conditions could be attributed to the local reduction of FeⅢto FeⅡ,which lower the oxidizing ability of surface reaction *** findings of this study provide us a promising approach to regulate the formation of EPFRs.

关键词： EPFR formation Phenol dissociation Oxygen-vacancy impact hematite surface First-principles calculation

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双侧输尿管肾源性腺瘤1例报告

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中华泌尿外科杂志 2024年第2期45卷 148-149页

作者：周世英何书明海南医学院第二附属医院泌尿外科海口570311

肾源性腺瘤发生于输尿管罕见。本文报道1例双侧输尿管肾源性腺瘤患者,术前CT检查示膀胱癌累及双侧输尿管壁内段和盆段。行膀胱镜活检,病理检查示肾源性腺瘤。行左侧输尿管镜检查+双侧输尿管下段切除术+右侧输尿管膀胱吻合术+左侧膀胱瓣... 详细信息

肾源性腺瘤发生于输尿管罕见。本文报道1例双侧输尿管肾源性腺瘤患者,术前CT检查示膀胱癌累及双侧输尿管壁内段和盆段。行膀胱镜活检,病理检查示肾源性腺瘤。行左侧输尿管镜检查+双侧输尿管下段切除术+右侧输尿管膀胱吻合术+左侧膀胱瓣输尿管下段成形术。术后病理诊断为肾源性腺瘤。术后随访26个月,患者无复发和转移。

关键词：输尿管输尿管肿瘤肾源性腺瘤

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双酚类化合物的生物代谢机理研究进展

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环境化学 2024年第3期43卷 711-721页

作者：赫淑铭潘文筱刘娴傅建捷张爱茜江桂斌国科大杭州高等研究院环境学院杭州310024 中国科学院生态环境研究中心环境化学与生态毒理学国家重点实验室北京100085 中国科学院大学资源与环境学院北京100049

以双酚A(bisphenol A,简称BPA)及其替代物为代表的双酚类化合物(bisphenols,简称BPs)在各种环境介质、食品、消费品以及人类和动物体中被广泛检出,表明BPs存在全球性大规模污染趋势.除了BPs自身毒性外,其在生物体内的转化代谢产物可能... 详细信息

以双酚A(bisphenol A,简称BPA)及其替代物为代表的双酚类化合物(bisphenols,简称BPs)在各种环境介质、食品、消费品以及人类和动物体中被广泛检出,表明BPs存在全球性大规模污染趋势.除了BPs自身毒性外,其在生物体内的转化代谢产物可能具有比母体化合物更复杂的内分泌干扰效应和毒性效应,对于人体生命健康的影响不容小觑.本文就BPs生物代谢的实验和理论计算研究方法及其取得的研究成果等方面进行回顾总结,在分析现有研究存在的问题和不足上对未来的研究重点提出了展望.

关键词：双酚类化合物代谢转化实验研究理论计算化学研究

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Thermodynamic theory of flotation for a complex multiphase solid -liquid system and high-entropy flotation

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1177-1197页

作者： shuming Wen State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China

The flotation of complex solid–liquid multiphase systems involve interactions among multiple components,the core problem facing flotation ***,the combined use of multicomponent flotation reagents to improve mineral flotation has become an important issue in studies on the efficient use of refractory mineral ***,studying the flotation of complex solid–liquid systems is extremely difficult,and no systematic theory has been developed to *** addition,the physical mechanism associated with combining reagents to improve the flotation effect has not been unified,which limits the development of flotation theory and the progress of flotation *** this study,we applied theoretical thermodynamics to a solid–liquid flotation system and used changes in the entropy and Gibbs free energy of the reagents adsorbed on the mineral surface to establish thermodynamic equilibrium equations that de-scribe interactions among various material components while also introducing adsorption equilibrium constants for the flotation reagents adsorbed on the mineral *** homogenization effect on the mineral surface in pulp solution was determined using the chemical potentials of the material components of the various mineral surfaces required to maintain *** flotation effect can be improved through synergy among multicomponent flotation reagents;its physical essence is the thermodynamic law that as the number of compon-ents of flotation reagents on the mineral surface increases,the surface adsorption entropy change increases,and the Gibbs free energy change of adsorption *** to the results obtained using flotation thermodynamics theory,we established high-entropy flotation theory and a technical method in which increasing the types of flotation reagents adsorbed on the mineral surface,increasing the adsorption entropy change of the flotation reagents,decreasing the Gibbs free energy change,and improving the adsorption efficiency

关键词： multicomponent flotation reagent adsorption entropy change equations of thermodynamic equilibrium adsorption equilibri-um constant high-entropy flotation

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槐定碱通过调节MCP-1/CCR2信号轴抑制膀胱癌恶性进展的实验研究

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现代肿瘤医学 2024年第11期32卷 1983-1990页

作者：彭泽椿徐明彬吴天士杨杰符仕宝何书明海南医学院第二附属医院泌尿外科二区海南海口570216

目的:探究槐定碱对膀胱癌恶性进展的影响以及该过程中对MCP-1/CCR2信号轴的调控机制。方法:通过CCK-8检测槐定碱对膀胱癌细胞5637的半数抑制浓度,随后将细胞分为对照组、槐定碱低浓度组、槐定碱高浓度组、槐定碱高+pcDNA组、槐定碱高+pc... 详细信息

目的:探究槐定碱对膀胱癌恶性进展的影响以及该过程中对MCP-1/CCR2信号轴的调控机制。方法:通过CCK-8检测槐定碱对膀胱癌细胞5637的半数抑制浓度,随后将细胞分为对照组、槐定碱低浓度组、槐定碱高浓度组、槐定碱高+pcDNA组、槐定碱高+pcDNA-MCP-1组。CCK-8检测各组细胞的增殖活性;流式细胞术检测各组细胞凋亡情况和细胞周期;Transwell实验检测各组细胞迁移和侵袭能力;Western blot检测各组细胞中E-cadherin、Vimentin、N-cadherin、MCP-1、CCR2蛋白的表达;qRT-PCR检测各组细胞中MCP-1、CCR2 mRNA的水平;建立移植瘤裸鼠模型,观察肿瘤生长情况并检测肿瘤组织中MCP-1、CCR2 mRNA及蛋白水平。结果:与对照组相比,槐定碱低、高浓度组细胞的存活率、克隆形成数量、S期细胞比例、迁移和侵袭细胞数量、Vimentin和N-cadherin表达、MCP-1和CCR2 mRNA及蛋白的水平均降低(Pherin表达升高(Pherin表达、MCP-1和CCR2 mRNA及蛋白的水平均升高(Pherin表达降低(P<0.05);裸鼠体内移植瘤实验结果显示,与对照组相比,槐定碱组小鼠肿瘤组织的重量和体积减小,MCP-1和CCR2 mRNA及蛋白水平降低(P<0.05);与槐定碱组相比,槐定碱+pcDNA-MCP-1组小鼠肿瘤组织的重量和体积增加,抑瘤率减小,MCP-1和CCR2 mRNA及蛋白水平升高(P<0.05)。结论:槐定碱可能通过抑制MCP-1/CCR2信号轴来抑制膀胱癌的恶性进展。

关键词：槐定碱膀胱癌单核细胞趋化蛋白1 C-C趋化因子受体2 恶性进展

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Deep Insight of Design,Mechanism,and Cancer Theranostic Strategy of Nanozymes

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Nano-Micro Letters 2024年第2期16卷 165-217页

作者： Lu Yang shuming Dong Shili Gai Dan Yang he Ding Lili Feng Guixin Yang Ziaur Rehman Piaoping Yang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001People’s Republic of China Yantai Research Institute Harbin Engineering UniversityYantai 264000People’s Republic of China Key Laboratory of Green Chemical Engineering and Technology of heilongjiang Province College of Material Science and Chemical EngineeringHarbin University of Science and TechnologyHarbin 150040People’s Republic of China Department of Chemistry Quaid-i-Azam UniversityIslamabad 45320Pakistan

Since the discovery of enzyme-like activity of Fe3O4 nanoparticles in 2007,nanozymes are becoming the promising substitutes for natural enzymes due to their advantages of high catalytic activity,low cost,mild reaction conditions,good stability,and suitable for large-scale ***,with the cross fusion of nanomedicine and nanocatalysis,nanozyme-based theranostic strategies attract great attention,since the enzymatic reactions can be triggered in the tumor microenvironment to achieve good curative effect with substrate specificity and low side ***,various nanozymes have been developed and used for tumor *** this review,more than 270 research articles are discussed systematically to present progress in the past five ***,the discovery and development of nanozymes are ***,classification and catalytic mechanism of nanozymes are ***,activity prediction and rational design of nanozymes are focused by highlighting the methods of density functional theory,machine learning,biomimetic and chemical ***,synergistic theranostic strategy of nanozymes are ***,current challenges and future prospects of nanozymes used for tumor theranostic are outlined,including selectivity,biosafety,repeatability and stability,in-depth catalytic mechanism,predicting and evaluating activities.

关键词： Nanozymes Classification Prediction and design Catalytic mechanism Tumor theranostics

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高校岗位设置与聘用改革——以C高校为例

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中国人力资源开发 2009年第9期26卷 60-63页

作者：何淑明重庆工商大学

案例：C高校的岗位设置与聘用改革为推进高校人事制度改革，实现高校人力资源的优化配置，C高校从2008年开始进行前期准备，并于2009年2月至6月集中完成了全校2000多名教职员工的岗位设置与聘用工作。

关键词：高校人力资源人事制度改革岗位设置聘用工作优化配置前期准备教职员工

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企业并购中人力资源整合的问题与对策

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中国人力资源开发 2010年第8期27卷 52-55页

作者：何淑明重庆工商大学

本文分析A公司人力资源整合的基本策略,探讨企业并购中人力资源整合存在的问题,提出了进一步推动人力资源有效整合的对策建议。

关键词：企业并购人力资源整合企业文化

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Distributed Graph Database Load Balancing Method Based on Deep Reinforcement Learning

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Computers, Materials & Continua 2024年第6期79卷 5105-5124页

作者： shuming Sha Naiwang Guo Wang Luo Yong Zhang Nanjing NARI Information&Communication Technology Co. Ltd.Nanjing210032China State Grid Electric Power Research Institute Nanjing211106China State Grid Shanghai Municipal Eleciric Power Company Shanghai200122China

This paper focuses on the scheduling problem of workflow tasks that exhibit *** indepen-dent batch tasks,workflows typically consist of multiple subtasks with intrinsic correlations and *** necessitates the distribution of various computational tasks to appropriate computing node resources in accor-dance with task dependencies to ensure the smooth completion of the entire *** scheduling must consider an array of factors,including task dependencies,availability of computational resources,and the schedulability of ***,this paper delves into the distributed graph database workflow task scheduling problem and proposes a workflow scheduling methodology based on deep reinforcement learning(DRL).The method optimizes the maximum completion time(makespan)and response time of workflow tasks,aiming to enhance the responsiveness of workflow tasks while ensuring the minimization of the *** experimental results indicate that the Q-learning Deep Reinforcement Learning(Q-DRL)algorithm markedly diminishes the makespan and refines the average response time within distributed graph database *** quantifying makespan,Q-DRL achieves mean reductions of 12.4%and 11.9%over established First-fit and Random scheduling strategies,***,Q-DRL surpasses the performance of both DRL-Cloud and Improved Deep Q-learning Network(IDQN)algorithms,with improvements standing at 4.4%and 2.6%,*** reference to average response time,the Q-DRL approach exhibits a significantly enhanced performance in the scheduling of workflow tasks,decreasing the average by 2.27%and 4.71%when compared to IDQN and DRL-Cloud,*** Q-DRL algorithm also demonstrates a notable increase in the efficiency of system resource utilization,reducing the average idle rate by 5.02%and 9.30%in comparison to IDQN and DRL-Cloud,*** findings support the assertion that Q-DRL not only upholds a lower average

关键词： Reinforcement learning workflow task scheduling load balancing

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Advances in depressants for flotation separation of Cu–Fe sulfide minerals at low alkalinity:A critical review

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 1-17页

作者： Qicheng Feng Wenhang Yang Maohan Chang shuming Wen Dianwen Liu Guang Han State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources Kunming University of Science and TechnologyKunming 650093China

The flotation separation of Cu–Fe sulfide minerals at low alkalinity can be achieved using selective *** the flotation system of Cu–Fe sulfide minerals,depressants usually preferentially interact with the pyrite surface to render the mineral surface hydrophilic and hinder the adsorption of the *** review summarizes the advances in depressants for the flotation separation of Cu–Fe sulfide minerals at low *** advances include use of inorganic depressants (oxidants and sulfur–oxygen compounds),natural polysaccharides (starch,dextrin,konjac glucomannan,and galactomannan),modified polymers (carboxymethyl cellulose,polyacrylamide,lignosulfonate,and tricarboxylate sodium starch),organic acids (polyglutamic acid,sodium humate,tannic acid,pyrogallic acid,salicylic acid,and lactic acid),sodium dimethyl dithiocarbamate,and *** potential application of specific inorganic and organic depressants in the flotation separation of Cu–Fe sulfide minerals at low alkalinity is *** advances in the use of organic depressants with respect to the flotation separation of Cu–Fe sulfide minerals are comprehensively ***,the depression performances and mechanisms of different types of organic depressants on mineral surfaces are ***,several perspectives on depressants vis-à-vis flotation separation of Cu–Fe sulfide minerals at low alkalinity are proposed.

关键词： Cu–Fe sulfide minerals flotation separation selective depressants depression mechanism

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