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Estimation of Chloride Diffusivity in Hydrated Tricalcium Silicate Using a Hydration-Diffusion Integrated Method

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 49-64页

作者： WANG Xin shen Dejian TAO Sijie LIU Ruixin WU shengxing College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China

This study aims to develop a chloride diffusion simulation method that considers the hydration microstructure and pore solution properties during the hydration of tricalcium silicate(C3S).The method combines the hydration simulation,thermodynamic calculation,and finite element analysis to examine the effects of pore solution,including effect of electrochemical potential,effect of chemical activity,and effect of mechanical interactions between ions,on the chloride effective diffusion coefficient of hydrated C3S *** results indicate that the effect of electrochemical potential on chloride diffusion becomes stronger with increasing hydration age due to the increase in the content of hydrated calcium silicate;as the hydration age increases,the effect of chemical activity on chloride diffusion weakens when the number of diffusible elements decreases;the effect of mechanical interactions between ions on chloride diffusion decreases with the increase of hydration age.

关键词： tricalcium silicate simulation method chloride diffusion coefficient pore solution

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长江三角洲地区城市污泥的综合生物毒性研究

生态与农村环境学报 2006年第2期22卷 54-58,70页

作者：申荣艳骆永明孙玉焕章钢娅李振高滕应钱薇中国科学院南京土壤研究所土壤与环境生物修复研究中心/土壤与农业可持续发展国家重点实验室

运用发光细菌法对我国长江三角洲地区16个城市中54个污泥样品的综合急性生物毒性进行了测定,并以毒性较为稳定的HgC l2作为参比毒物,以发光细菌抑光率、相当标准毒物HgC l2质量浓度及百分数等级比较法毒性划分标准评价城市污泥的毒性。... 详细信息

运用发光细菌法对我国长江三角洲地区16个城市中54个污泥样品的综合急性生物毒性进行了测定,并以毒性较为稳定的HgC l2作为参比毒物,以发光细菌抑光率、相当标准毒物HgC l2质量浓度及百分数等级比较法毒性划分标准评价城市污泥的毒性。结果表明,供试的不需稀释测定毒性的城市污泥中,有13个是剧毒的,占样品总数30.95%;需稀释测定毒性的城市污泥中,毒性等级为Ⅰ级的8个,占样品总数66.67%。长江三角洲地区城市污泥大部分有较高的综合急性生物毒性,这与含多种高量的有毒重金属有关。城市污泥对发光细菌毒性的大小与城市污泥来源、污水处理工艺及污泥类型等因素有关。上海地区的污泥毒性大于江苏和浙江地区;42个毒性较小的污泥中,大部分氧化沟处理的城市污泥的毒性要大于A2/O(厌氧-缺氧/好氧)处理的,12个毒性较大的污泥中处理工艺多为活性污泥处理与A2/O处理;大部分以生活污水和混流污水为主的城市污泥毒性要高于以工业污水为主的城市污泥。

关键词：发光细菌法城市污泥抑光率急性生物毒性

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-yan Huang Yi-De Zhang Jie Chen Hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li Hai-Wei Pu Xin-Yian Guo Jian-Gang shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang Liu Xiang Li shen Du Ming Gao yanbin Yin Jiongming Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

During the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity

Mechanism by which Rab5 promotes regeneration and functional recovery of zebrafish Mauthner axons

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Neural Regeneration Research 2025年第6期20卷 1816-1824页

作者： Jiantao Cui Yueru shen Zheng Song Dinggang Fan Bing Hu Center for Advanced Interdisciplinary Science and Biomedicine of IHM Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina

Rab5 is a GTPase protein that is involved in intracellular membrane trafficking. It functions by binding to various effector proteins and regulating cellular responses, including the formation of transport vesicles and their fusion with the cellular membrane. Rab5 has been reported to play an important role in the development of the zebrafish embryo;however, its role in axonal regeneration in the central nervous system remains unclear. In this study, we established a zebrafish Mauthner cell model of axonal injury using single-cell electroporation and two-photon axotomy techniques. We found that overexpression of Rab5 in single Mauthner cells promoted marked axonal regeneration and increased the number of intra-axonal transport vesicles. In contrast, treatment of zebrafish larvae with the Rab kinase inhibitor CID-1067700markedly inhibited axonal regeneration in Mauthner cells. We also found that Rab5 activated phosphatidylinositol 3-kinase(PI3K) during axonal repair of Mauthner cells and promoted the recovery of zebrafish locomotor function. Additionally, rapamycin, an inhibitor of the mechanistic target of rapamycin downstream of PI3K, markedly hindered axonal regeneration. These findings suggest that Rab5 promotes the axonal regeneration of injured zebrafish Mauthner cells by activating the PI3K signaling pathway.

关键词： axonal regeneration Mauthner cell nerve regeneration Rab5 zebrafish

气相色谱法测定城市污泥中多氯联苯与有机氯农药

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广东农业科学 2014年第7期41卷 170-174页

作者：申荣艳骆永明许霞梁玉婷赵兴青常州大学环境与安全工程学院江苏常州213164 中国科学院烟台海岸带研究所山东烟台264003

建立了以丙酮和石油醚超生提取,用硫酸、高纯铜粉和硅胶柱净化的可同时检测长江三角洲地区城市污泥中有机氯污染物的气相色谱法.与传统方法相比,在保证足够准确度、精确度和灵敏度的前提下,该方法具有前处理简单、测定成本低、样品用量... 详细信息

建立了以丙酮和石油醚超生提取,用硫酸、高纯铜粉和硅胶柱净化的可同时检测长江三角洲地区城市污泥中有机氯污染物的气相色谱法.与传统方法相比,在保证足够准确度、精确度和灵敏度的前提下,该方法具有前处理简单、测定成本低、样品用量少的特点,且可同时测定城市污泥中有机氯农药（OCPs）和多氯联苯类（PCBs）化合物.应用该方法对我国长江三角洲地区城市污泥中PCBs和OCPs进行测试,结果表明,方法最低检出限为0.09～0.33 μg/kg,达到了微量分析要求.加标回收试验中,PCBs回收率为59.50％～101.51％,OCPs回收率为57.21％～89.62％,相对标准偏差为1.89％～14.67％.

关键词：气相色谱电子捕获检测多氯联苯有机氯农药城市污泥

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand C–N bonds coupling performance in NO3- integrated CO2 reduction to carbon and nitrogen compounds over dual Cu-based N-doped carbon catalyst

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Journal of Energy Chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou Chen shen Zhenghao Wu Xingying Lan Yi Xiao College of Carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of Chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAC）,particularly copper （Cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert CO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves C–C and C–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of Cu-based catalysts for the N-integrated CO2reduction reaction （CO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a Cu2-based N-doped carbon (Cu2N6C10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of CO2,the formation of a solvation electric layer by anions （F-,Cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and Ca2+) leads to electron transfer towards the Cu *** process significantly accelerates the reduction of *** results reveal that*CO intermediates play a pivotal role in N-integrated ***,the Cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for C–N coupling to *** findings reveal that through the process of a condensation reaction between*CO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*CO2to*CCO at dual Cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,except when F-and Ca2+were ***,the mechanisms of C–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： Condensation reactions

Photo‑Energized MoS_(2)/CNT Cathode for High‑Performance Li–CO_(2)Batteries in a Wide‑Temperature Range

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Nano-Micro Letters 2025年第1期17卷 160-175页

作者： Tingsong Hu Wenyi Lian Kang Hu Qiuju Li Xueliang Cui Tengyu Yao Laifa shen Jiangsu Key Laboratory of Materials and Technologies for Energy Storage College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China

Li–CO_(2) batteries are considered promising energy storage systems in extreme environments such as Mars;however,severe performance degradation will occur at a subzero temperature owning to the sluggish reaction ***,a photo-energized strategy adopting sustainable solar energy in wide working temperature range Li–CO_(2) battery was achieved with a binder-free MoS_(2)/carbon nanotube(CNT)photo-electrode as *** unique layered structure and excellent photoelectric properties of MoS_(2) facilitate the abundant generation and rapid transfer of photo-excited carriers,which accelerate the CO_(2) reduction and Li_(2)CO_(3) decomposition upon *** illuminated battery at room temperature exhibited high discharge voltage of 2.95 V and mitigated charge voltage of 3.27 V,attaining superior energy efficiency of 90.2%and excellent cycling stability of over 120 *** at an extremely low temperature of−30℃,the battery with same electrolyte can still deliver a small polarization of 0.45 V by the photoelectric and photothermal synergistic mechanism of MoS_(2)/CNT *** work demonstrates the promising potential of the photo-energized wide working temperature range Li–CO_(2) battery in addressing the obstacle of charge overpotential and energy efficiency.

关键词： Li-CO_(2)batteries Photo-energized Wide operation-temperature Kinetics MoS_(2)

长三角地区城市污泥施入土壤对白菜种子发芽和根伸长的影响

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广东农业科学 2012年第18期39卷 43-45,47页

作者：申荣艳郑正赵兴青骆永明李振高滕应常州大学环境与安全工程学院江苏常州213164 复旦大学环境科学与工程系上海200433 中国科学院南京土壤研究所江苏南京210008

通过室内培养试验,研究了青紫泥条件下长江三角洲地区城市污泥对白菜种子发芽率和根伸长抑制率的影响。结果表明,随着时间的延长,绝大部分城市污泥处理的土壤中白菜种子发芽率的变化趋势是升高-下降-下降-升高;绝大部分处理白菜种子根... 详细信息

通过室内培养试验,研究了青紫泥条件下长江三角洲地区城市污泥对白菜种子发芽率和根伸长抑制率的影响。结果表明,随着时间的延长,绝大部分城市污泥处理的土壤中白菜种子发芽率的变化趋势是升高-下降-下降-升高;绝大部分处理白菜种子根伸长抑制率的变化趋势是下降-升高-下降-升高。污泥在刚刚施入土壤后(1～15 d),对白菜种子发芽和根伸长的抑制作用均较小,随着时间的延长(45 d),污泥与土壤混合体对白菜种子的根毒性逐渐增大,75 d毒性较小,显示促进根生长作用,105 d后一部分处理毒性增加,另一部分处理则显示促进根生长作用。在整个培养过程中,各处理发芽率的变化较小,而根伸长抑制率的变化较大,因此用根伸长抑制率的变化来表征城市污泥施入土壤后对高等植物白菜早期生长的影响及毒性大小较为客观。

关键词：城市污泥白菜种子发芽率根伸长抑制率长三角