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Effect of initial ammonium concentration on a one-stage partial nitrification/anammox biofilm system:Nitrogen removal performance and the microbial community

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Journal of Environmental Sciences 2024年第9期143卷 176-188页

作者： Mengyu Zhou Yun han Yang Zhuo fen Yu Gaoyuan Hu Dangcong Peng School of Municipal and Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Shaanxi Key Laboratory of Environmental Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Key Laboratory of Northwest Water Resource Environment and EcologyMOEXi’an University of Architecture and TechnologyXi’an 710055China

One-stage partial nitrification coupled with anammox(PN/A)technology effectively reduces the energy consumption of a biological nitrogen removal *** nitrite-oxidizing bacteria(NOB)is essential for this technology to maintain efficient nitrogen removal *** ammonium concentration(IAC)affects the degree of inhibited *** this study,the effect of the IAC on a PN/A biofilm was investigated in a moving bed biofilm *** results showed that nitrogen removal efficiency decreased from 82.49%±1.90%to 64.57%±3.96%after the IAC was reduced from 60 to 20 mg N/L,while the nitrate production ratio increased from 13.87%±0.90%to 26.50%±3.76%.NOB activity increased to1,133.86 mg N/m^(2)/day after the IAC decreased,approximately 4-fold,indicating that the IAC plays an important inhibitory role in *** rate-limiting step in the mature biofilm of the PN/A system is the nitritation process and is not shifted by the *** analysis of the microbial community structure in the biofilm indicates that the IAC was the dominant factor in changes in community *** and *** were the main anammox bacteria,and Nitrosomonas and Nitrospira were the main AOB and NOB,*** did not affect the difference in growth between *** and ***,modulating the IAC promoted the PN/A process with efficient nitrogen removal performance at medium to low ammonium concentrations.

关键词： Biological nitrogen removal Partial nitrification Anammox Ammonium concentration Biofilm

Laser welding study of vacuum sintered HUST-1 lunar regolith simulant

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Science China(Technological Sciences) 2024年第9期67卷 2905-2918页

作者： han WenBin DING LieYun ZHOU Cheng ZHOU Yan DANG fen National Center of Technology Innovation for Digital Construction Huazhong University of Science and TechnologyWuhan 430074China School of Civil and Hydraulic Engineering Huazhong University of Science and TechnologyWuhan 730074China

Efforts are underway to establish a permanent lunar base on the Moon. In situ lunar regolith is anticipated to be useful as a building material after sintering. However, sintering lunar regolith into a large-scale structure presents challenges. Therefore, the key to lunar construction lies in assembling multiple small-sized sintered modules into a stable, large-sized structure. This study explored the feasibility of welding the sintered HUST-1 lunar regolith simulant(HLRS) using a laser device and conducted experiments using lasers of varying power. The microstructure, mineral composition, element distribution, and shear strength of the welded joint were investigated. A few low-melting minerals were fused and vaporized during welding, leading to the generation of thermal decomposition gas. Furthermore, the welded joint exhibited numerous micro-cracks, pores, and bubbles,resulting in reduced weld shear strength. Finally, the influence of laser power on weld shear strength was investigated, revealing that the highest shear strength(15.69 N/cm) was achieved at a laser power of 1000 W. This study demonstrates the feasibility of laser welding of sintered HLRS for the first time, with potential applications in lunar base construction.

关键词： lunar regolith vacuum sintering laser welding weld shear strength lunar base

Vanadium nitride quantum dots@carbon skeleton anode material synthesized via in situ oxidation initiation strategy

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Tungsten 2024年第3期6卷 561-573页

作者： Yi-han Fu Yuan-You Peng Lei Zhao Tian-Qi He Mei-Mei Yuan Hao Dang Rui Liu fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology

Vanadium nitride（VN） has received significant attention as a potential negative electrode material due to its remarkable theoretical and physical ***,the electrochemical performance needs to be improved due to its low specific surface area and the issue of being easily dissolved in *** have shown that the composite structure of carbon-coated nano sc ale VN particles could significantly increase the specific surface area of VN,and more importantly,and the carbon matrix can effectively restrain the dissolution of VN particles in the electrolyte,thereby improving its chemical and electrochemical performance,including specific capacity and cycling ***,VN quantum dots are synthesized and protected by uniformly coating the carbon skeleton on its surface via an in situ strategy of oxidation initiation,which initiates dopamine polymerization,forming a crystalline complex of polydopamine and *** heat treatment,the product is a composite material with VN quantum dots embedded in the amorphous carbon *** resulting smallsized and crosslinked carbon particles formed a graded pore structure,more reasonable channels provided for electrolyte ions transport *** the composite material was used as the negative electrode material for supercapacitors,it exhibits the specific capacity of 391.9 F·g-1at a current density of 0.5 A·g-1and excellent capacity retention rate of 83.6% after *** synthesis method of this quantum dot could be applied to other metal compounds and has potential applications in catalysis,environmental protection,and other fields.

关键词： In situ initiation Vanadium nitride Quantum dots Anode Supercapacitors

Clinicopathological features of gastric glomus tumor

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World Journal of Gastroenterology 2010年第36期16卷 4616-4620页

作者： Hui-Qiong Fang,Jing Yang,fen-fen Zhang,An-Jia han,Department of Pathology,First Affiliated Hospital of Sun Yat-Sen University,Guangzhou 510080,Guangdong Province,China Hui-Qiong Fang,Department of Pathology,Foshan Hospital of Traditional Chinese Medicine,Foshan 528000,Guangdong Province,China Jing Yang,Department of Pathology,People’s Hospital of Zhu-hai City,Zhuhai 519000,Guangdong Province,China Yi Cui,Department of Gastroenterology,First Affiliated Hospital of Sun Yat-Sen University,Guangzhou 510080,Guangdong Province,China Department of Pathology First Affiliated Hospital of Sun Yat-Sen University Guangzhou 510080 Guangdong Province China.

AIM:To study the clinicopathological features of gastric glomus tumor and review the related Chinese literature published in ***:A case of gastric glomus tumor was *** findings in 56 cases of gastric glomus tumor were ***:Gastric glomus tumor was far more common in women than in men with a female to male ratio of 1.6:*** median age of the patients was 45 years(range 28-79 years).The patients often complained of epigastric pain and bloody *** tumor was located in antrum of the *** greatest diameter of the tumor was ***,the tumor was comprised of nests of glomus cells surrounding the *** cells were small,uniform and ***,smooth muscle actin and actin were expressed in the *** markers,including S-100 protein,CD34,CD117,desmin,CD56,synaptophysin,chromo-granin A,neuron specific enolase and cytokeratin were all ***:Gastric glomus tumor is a rare benign mesenchymal *** diagnosis depends on pathologic *** diagnosis includes gastrointestinal stromal tumor,paraganglioma and carcinoid tumor.

关键词： Stomach Glomus tumor Clinicopathology Immunohistochemistry

Understanding the dehydrogenation properties of Mg(0001)/MgH_(2)(110)interface from first principles

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Materials Reports(Energy) 2024年第1期4卷 89-94页

作者： Jianchuan Wang Bo han Zhiquan Zeng Shiyi Wen fen Xu Yong Du State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083PR China Powder Metallurgy Research Institute Central South UniversityChangsha410083PR China Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin541004PR China

Magnesium hydride is one of the most promising solid-state hydrogen storage materials for on-board *** desorption from MgH_(2) is accompanied by the formation of the Mg/MgH_(2) interfaces,which may play a key role in the further dehydrogenation *** this work,first-principles calculations have been used to understand the dehydrogenation properties of the Mg(0001)/MgH_(2)(110) *** is found that the Mg(0001)/MgH_(2)(110) interface can weaken the Mg-H *** removal energies for hydrogen atoms in the interface zone are significantly lower compared to those of bulk MgH_(2).In terms of H mobility,hydrogen diffusion within the interface as well as into the Mg matrix is *** calculated energy barriers reveal that the migration of hydrogen atoms in the interface zone is easier than that in the bulk MgH_(2).Based on the hydrogen removal energies and diffusion barriers,we conclude that the formation of the Mg(0001)/MgH_(2)(110) interface facilitates the dehydrogenation process of magnesium hydride.

关键词： Magnesium hydrides First-principles calculation Hydrogen storage materials Interface Hydrogen desorption

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高校党建工作与思想政治教育工作融合研究

淮南职业技术学院学报 2024年第2期24卷 61-63页

作者：韩芬潞安职业技术学院山西长治046000

近年来,党中央围绕高等院校党建工作与思想政治教育工作提出诸多重要思想与创新性论述,两者关系日渐密切。并且,高校党建工作与思想政治教育目标同向、思想同源、发展同步,这一互构性逻辑前提为两者互促提供了重要基础。高校可从强化顶... 详细信息

近年来,党中央围绕高等院校党建工作与思想政治教育工作提出诸多重要思想与创新性论述,两者关系日渐密切。并且,高校党建工作与思想政治教育目标同向、思想同源、发展同步,这一互构性逻辑前提为两者互促提供了重要基础。高校可从强化顶层设计、构建相互学习机制、拓宽党建工作辐射范围、强化互联网技术整合打造等三个维度推动两者相互促进,打造党建工作与思想政治教育良性互动的完美生态。

关键词：高校党建工作思想政治教育互促

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卤化物钙钛矿敏感材料及其气敏传感应用

硅酸盐学报 2024年第1期52卷 292-304页

作者：韩飞王玲玲陈伟胡银章芬邵伟江西省科学院能源研究所南昌330096 江西省科学院应用化学研究所南昌330096 南昌航空大学环境与化学工程学院南昌330063

近年来,卤化物钙钛矿材料的光物理性质被充分研究,因其具有高电子迁移率和双极性电荷传输等特性,在室温气敏传感领域具有广阔的应用前景。本综述介绍了卤化物钙钛矿材料及其气敏传感应用,调研了卤化物钙钛矿气敏传感材料的研究现状,详... 详细信息

近年来,卤化物钙钛矿材料的光物理性质被充分研究,因其具有高电子迁移率和双极性电荷传输等特性,在室温气敏传感领域具有广阔的应用前景。本综述介绍了卤化物钙钛矿材料及其气敏传感应用,调研了卤化物钙钛矿气敏传感材料的研究现状,详细探讨了不同体系卤化物钙钛矿气敏传感器在NO_(x)、NH_(3)、H_(2)S、挥发性有机化合物(VOCs)以及其他有毒、有害气体检测方面的性能参数和传感机制,最后展望了卤化物钙钛矿气敏传感器的发展趋势,以期为进一步提高器件性能和拓展器件应用提供参考。

关键词：卤化物钙钛矿传感器气敏性能传感机制

Prediction of Renal Function by Urinary Lead and Cadmium - Based on Classification Decision Tree and Logistic Regression Model

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Biomedical and Environmental Sciences 2024年第3期37卷 331-335页

作者： LI Yang WANG Qing Yao TIAN Qing Hua AN Qi YANG Yu Tong ZhanG Jia Chen LI Shuang Jing ZHOU han LIANG Yun fen SHEN Wei Tong MU Li Na LEI Li Jian Department of Epidemiology School of Public HealthShanxi Medical UniversityTaiyuan 030001ShanxiChina Department of Epidemiology School of Public HealthShanxi Key Laboratory of Environmental Health Impairment and PreventionNHC Key Laboratory of PneumoconiosisMOE Key Laboratory of Coal Environmental Pathogenicity and PreventionShanxi Medical UniversityTaiyuan 030001ShanxiChina Department of Epidemiology and Environmental Health School of Public Health and Health ProfessionsThe State University of New York at BuffaloBuffaloNYUSA.

It is estimated that chronic kidney disease(CKD)will be the fifth leading cause of death in the world by 2040[1].Early recognition and intervention for kidney damage are *** glomerular filtration rate(eGFR)can be calculated by measuring blood creatinine to evaluate glomerular function,and urinary N-acetyl-β-δ-glucosaminidase(UNAG)level is generally recognized as a marker of renal tubular *** to lead(Pb)and cadmium(Cd)can damage renal function,leading to a decrease in eGFR and an increase in UNAG[2].Both Pb and Cd are easily accumulated in the body and then slowly released by the kidneys and ***,urinary Pb(UPb)and Cd(UCd)levels can be used as biomarkers of exposure[3,4].

关键词： urinary damage slowly

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国别化中文教育视角下教师课堂教学研究

汉语学习 2024年第2期 71-81页

作者：王海峰韩晓明北京大学对外汉语教育学院北京100871 中央财经大学国际文化交流学院北京100081

国际中文课堂教学效果与学习者的二语交际意愿密切相关。本文以国别化视角考察教师因素对日本学生汉语课堂交际意愿的影响。整体而言,教师的内在品质、课堂反馈和课堂管理三个维度的具体表现是影响日本学生交际意愿的主要因素。日本学... 详细信息

国际中文课堂教学效果与学习者的二语交际意愿密切相关。本文以国别化视角考察教师因素对日本学生汉语课堂交际意愿的影响。整体而言,教师的内在品质、课堂反馈和课堂管理三个维度的具体表现是影响日本学生交际意愿的主要因素。日本学生整体与不同群体以及不同群体之间对具体教师行为的感知反应呈现出差异性,不同语言环境、性别和学习时长的日本学生对影响其交际意愿的教师因素接受度也不同。

关键词：国别化中文教育教师课堂教学日本学生交际意愿