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Q235钢在内蒙古苏里格大气田土壤环境中的腐蚀行为

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内蒙古科技大学学报 2008年第3期27卷 216-219页

作者：王晶宋义全冯佃臣李涛谢修伟内蒙古科技大学材料与冶金学院内蒙古包头014010

通过室内不同含水量的土壤埋片实验,研究了Q235钢于内蒙古苏里格大气田土壤环境中的腐蚀速率随时间的变化规律,并进行了钢的腐蚀形貌观察和腐蚀产物的EDS和XRD的分析.实验结果表明,随着时间的延长,钢的腐蚀速率先增大后减小;当腐蚀时间... 详细信息

通过室内不同含水量的土壤埋片实验,研究了Q235钢于内蒙古苏里格大气田土壤环境中的腐蚀速率随时间的变化规律,并进行了钢的腐蚀形貌观察和腐蚀产物的EDS和XRD的分析.实验结果表明,随着时间的延长,钢的腐蚀速率先增大后减小;当腐蚀时间相同时,Q235钢在10%含水量(质量分数)的土壤中腐蚀程度最为严重;腐蚀形貌观察发现Q235钢点腐蚀倾向较为严重;钢的腐蚀产物主要是铁的氧化物(Fe_2O_3,Fe_3O_4).

关键词： Q235钢土壤腐蚀腐蚀速率

X70管线钢于内蒙古苏里格大气田土壤中的腐蚀特征

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内蒙古科技大学学报 2007年第1期26卷 22-25页

作者：霍林桃宋义全冯光冯佃臣李涛李晓刚内蒙古科技大学材料与冶金学院内蒙古包头014010 包头市昆都仑区环卫局内蒙古包头014010 北京科技大学材料科学与工程学院北京100083

利用SEM,EDS,XRD及失重法研究了X70管线钢在不同含水量的苏里格大气田土壤中的腐蚀行为.实验结果表明,随着含水量的增加,钢的腐蚀速率先增大后减小,水的质量分数为10%时腐蚀速率最大;通过对腐蚀形貌的观察发现,X70钢为不均匀腐蚀;EDS和... 详细信息

利用SEM,EDS,XRD及失重法研究了X70管线钢在不同含水量的苏里格大气田土壤中的腐蚀行为.实验结果表明,随着含水量的增加,钢的腐蚀速率先增大后减小,水的质量分数为10%时腐蚀速率最大;通过对腐蚀形貌的观察发现,X70钢为不均匀腐蚀;EDS和XRD分析显示X70钢的腐蚀产物主要为铁氧化物(Fe2O3,Fe3O4).

关键词： X70钢土壤腐蚀腐蚀规律

A Family of Nonnormal Cayley Digraphs

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Acta Mathematica Sinica,English Series 2001年第1期17卷 147-152页

作者： Yan Quan feng dian Jun WANG Jing Lin chen Department of Mathematics Northern JiaoTong University Department of Mathematics Tsinghua University Department of Mathematics Tangshan Normal College

We call a Cayley digraph Γ=Cay(G, S) normal for G if G_R, the right regular representation of G, is a normal subgroup of the full automorphism group Aut(Γ) of Γ. In this paper we determine the normality of Cayley digraphs of valency 2 on nonabelian groups of order 2p^2 (p odd prime). As a result, a family of nonnormal Cayley digraphs is found.

关键词： Cayley digraph Normal Cayley digraph

Influence of Self-excited Vibrating Cavity Structure on Droplet Diameter Characteristics of Twin-fluid Nozzle

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Chinese Journal of Mechanical Engineering 2018年第4期31卷 192-201页

作者： Bo chen dian-Rong Gao Shao-feng Wu Jian-Hua Zhao School of Mechanical Engineering Yanshan University School of Mechanical Engineering Hangzhou Dianzi University State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University

It is a great challenge to find effective atomizing technology for reducing industrial pollution; the twin-fluid atomizing nozzle has drawn great attention in this field recently. Current studies on twin-fluid nozzles mainly focus on droplet breakup and single droplet characteristics. Research relating to the influences of structural parameters on the droplet diameter characteristics in the flow field is scarcely available. In this paper, the influence of a self-excited vibrating cavity structure on droplet diameter characteristics was investigated. Twin-fluid atomizing tests were performed by a self-built open atomizing test bench, which was based on a phase Doppler particle analyzer(PDPA). The atomizing flow field of the twin-fluid nozzle with a self-excited vibrating cavity and its absence were tested and analyzed. Then the atomizing flow field of the twin-fluid nozzle with different self-excited vibrating cavity structures was *** experimental results show that the structural parameters of the self-excited vibrating cavity had a great effect on the breakup of large droplets. The Sauter mean diameter(SMD) increased with the increase of orifice diameter or orifice depth. Moreover, a smaller orifice diameter or orifice depth was beneficial to enhancing the turbulence around the outlet of nozzle and decreasing the SMD. The atomizing performance was better when the orifice diameter was2.0 mm or the orifice depth was 1.5 mm. Furthermore, the SMD increased first and then decreased with the increase of the distance between the nozzle outlet and self-excited vibrating cavity, and the SMD of more than half the atomizing flow field was under 35 μm when the distance was 5.0 mm. In addition, with the increase of axial and radial distance from the nozzle outlet, the SMD and arithmetic mean diameter(AMD) tend to increase. The research results provide some design parameters for the twin-fluid nozzle, and the experimental results could serve as a beneficial suppleme

关键词： Atomizing nozzle Twin-fluid Sauter mean diameter Arithmetic mean diameter Self-excited vibrating cavity Phase Doppler particle analyzer

Honokiol Prevents Intestinal Barrier Dysfunction in Mice with Severe Acute Pancreatitis and Inhibits JAK/STAT1 Pathway and Acetylation of HMGB1

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Chinese Journal of Integrative Medicine 2024年第6期30卷 534-542页

作者： LI Jie chen Ya-feng GAO Lei LI Yi-jie feng dian-xu Department of General Surgery Putuo HospitalShanghai University of Traditional Chinese MedicineShanghai200062China

Objective To investigate the effect of honokiol(HON)and the role of high-mobility group protein B1(HMGB1)on the pathogenesis of severe acute pancreatitis(SAP).Methods Thirty mice were numbered according to weight,and randomly divided into 5 groups using a random number table,including control,SAP,SAP and normal saline(SAP+NS),SAP and ethyl pyruvate(SAP+EP),or SAP+HON groups,6 mice in each *** of pancreas,intestine,and blood were collected 12 h after SAP model induction for examination of pathologic changes,immune function alterations by enzyme linked immunosorbent assay(ELISA),and Western *** vitro experiments,macrophages were divided into 5 groups,the control,lipopolysaccharide(LPS),LPS+DMSO(DMSO),LPS+anti-HMGB1 monoclonal antibody(mAb),and LPS+HON *** tight connection level was determined by transmission electron microscopy and fluorescein *** location and acetylation of HMGB1 were measured by Western ***,pyridone 6 and silencing signal transducer and activator of the transcription 1(siSTAT1)combined with honokiol were added to determine whether the Janus kinase(JAK)/STAT1 participated in the regulation of honokiol on *** protein expression levels of HMGB1,JAK,and STAT1 were detected using Western *** Mice with SAP had inflammatory injury in the pancreas,bleeding of intestinal tissues,and cells with disrupted *** in the SAP+HON group had significantly fewer pathological *** with SAP also had significant increases in the serum levels of amylase,lipase,HMGB1,tumor necrosis factor-α,interleukin-6,diamine oxidase,endotoxin-1,and *** in the SAP+HON group did not show these abnormalities(P<0.01).Studies of Caco-2 cells indicated that LPS increased the levels of occludin and claudin-1 as well as tight junction permeability,decreased the levels of junctional adhesion molecule C,and elevated intercellular permeability(P<0.01).HON treatment blocked these *** of

关键词： severe acute pancreatitis intestinal barrier dysfunction honokiol high-mobility group protein B1 Januskinase signal transducerand activatorof transcription1

Peri-centrosomal localization of small interfering RNAs in C. elegans

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Science China Life Sciences 2025年

作者： Qile Jin Xuezhu feng Minjie Hong Ke Wang Xiangyang chen Jiewei cheng Yan Kuang Xiaoyue Si Mingjing Xu Xinya Huang Shouhong Guang chengming Zhu Department of Obstetrics and Gynecology The First Affiliated Hospital of USTC The USTC RNA Institute Hefei National Research Center for Physical Sciences at the Microscale School of Life Sciences Division of Life Sciences and Medicine Biomedical Sciences and Health Laboratory of Anhui Province University of Science and Technology of China School of Basic Medicine Anhui Medical University

The centrosome is the microtubule-organizing center and a crucial part of cell division. Centrosomal RNAs(cnRNAs) have been reported to enable precise spatiotemporal control of gene expression during cell division in many species. Whether and how cnRNAs exist in C. elegans are unclear. Here, using the nuclear RNAi Argonaute protein NRDE-3 as a reporter, we observed potential peri-centrosome localized small interfering(si)RNAs in C. elegans. NRDE-3 was previously shown to associate with pre-mRNAs and pre-rRNAs via a process involving the presence of complementary siRNAs. We generated a GFP-NRDE-3 knock-in transgene through CRISPR/Cas9 technology and observed that NRDE-3 formed peri-centrosomal foci neighboring the tubulin protein TBB-2, other centriole proteins and pericentriolar material(PCM)components in C. elegans embryos. The peri-centrosomal accumulation of NRDE-3 depends on RNA-dependent RNA polymerase(RdRP)-synthesized 22G siRNAs and the PAZ domain of NRDE-3, which is essential for siRNA binding. Mutation of eri-1, ergo-1, or drh-3 significantly increased the percentage of pericentrosome-enriched NRDE-3. At the metaphase of the cell cycle, NRDE-3 was enriched in both the peri-centrosomal region and the spindle. Moreover, the integrity of centriole proteins and pericentriolar material(PCM) components is also required for the peri-centrosomal accumulation of NRDE-3. Therefore, we concluded that siRNAs could accumulate in the pericentrosomal region in C. elegans and suggested that the peri-centrosomal region may also be a platform for RNAi-mediated gene regulation.

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低频磁场悬浮固态金属的实验研究

内蒙古科技大学学报 2010年第2期29卷 158-160页

作者：贺文丽麻永林李慧琴冯佃臣邢淑清内蒙古科技大学材料与冶金学院内蒙古包头014010 东北大学轧制技术与连轧自动化国家重点实验室辽宁沈阳110066

采用自行设计的电磁封流实验装置进行了固态金属锌块和铝块的悬浮实验,讨论了电流强度、电阻率与电磁力的关系,并用高斯计测量了磁场强度,分析了低频磁场悬浮固态金属的可能性,为下一步的液态金属封流实验提供相关参数.

关键词：低频磁场电磁力悬浮锌块铝块

新疆库尔勒土壤模拟溶液中X70钢的缝隙腐蚀(英文)

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包头钢铁学院学报 2006年第2期25卷 144-152页

作者：宋义全冯佃臣张新杜翠薇李晓刚内蒙古科技大学材料与冶金学院内蒙古包头014010 北京科技大学北京市腐蚀与表面技术重点实验室北京100083

以新疆库尔勒土壤模拟溶液为腐蚀介质（0．06MCl^-＋0．009MSO4^2-＋0．0017MHCO^3-），在阴极极化条件下，采用楔型缝隙模型研究了具有剥离涂层缺陷X70钢的缝隙腐蚀．楔型缝隙的一端封闭，另一开口端延伸到溶池（100mm×100mm×100mm... 详细信息

以新疆库尔勒土壤模拟溶液为腐蚀介质（0．06MCl^-＋0．009MSO4^2-＋0．0017MHCO^3-），在阴极极化条件下，采用楔型缝隙模型研究了具有剥离涂层缺陷X70钢的缝隙腐蚀．楔型缝隙的一端封闭，另一开口端延伸到溶池（100mm×100mm×100mm）的模拟溶液中．楔型缝隙的尺寸为深100mm，宽45mm，开口尺寸0．15．0．45mm．将6条X70钢电极试样安装到缝隙中用以测定缝口不同距离处的局部电流密度、极化电位并监测试样的腐蚀状况．安装在缝隙上盖测量孔中的H^＋离子探头用于测量缝内的pH值．采用-0．85，-1．0和-1．15V（相对于CSE）的阴极极化电位分别对缝口尺寸（δ）为0．15，0．30和0．45mm的楔型缝隙进行阴极极化．试验结果表明，随着极化时间的延长，缝内局部电流密度和极化电位变得更为均匀，随着缝口控电位的降低以及缝口尺寸的增加，缝内的局部电流密度和pH值增加．缝口控电位相同时，从缝口到缝底的pH值先增加，然后达到一个较稳定的状态．缝口控电位越低以及缝口尺寸越大，pH值越易于达到稳定状态，且pH值开始增加的速率越小．

关键词：缝隙腐蚀楔型缝隙 X70管线钢阴极极化极化电位局部电流密度

NIR photothermal enhancement to achieve high-efficiency nitrogen reduction to ammonia by polyoxometalates@Fe-polydopamine

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Nano Research 2025年第1期18卷 118-128页

作者： Xiaofei chen Lixin Wu feng Bai Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologySchool of Nanoscience and Materials EngineeringHenan UniversityKaifeng 475004China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

The development of atmospheric pressure N_(2)reduction to NH_(3)is attracting much attention in green chemistry,yet it is still a challenge to obtain satisfactory activity under mild ***,an efficient near-infrared(NIR)photothermal catalysis reduction of N_(2)constitutes an occurrence is *** or without V-substitute polyoxometalates(POMs)loaded on the surface of Fechelated polydopamine(Fe-PDA)photothermal support through the electrostatic interactions,NIR photothermal catalysts POMs@Fe-PDA are *** induction of“FeV”cofactor facilitates electron transfer between V(V)/V(IV)&Fe(III)/Fe(II)and N_(2),thereby activating N_(2)*** synergy between the catalytic activity of V-POMs and the local NIR photothermal effect of Fe-PDA dramatically enhances N_(2)***,PMo_(10)V_(2)@Fe-PDA exhibits a significantly enhanced NH_(3)production rate of 181.1μmol·LN^(-1)with a turnover frequency of 1006.1 mmol·MN^(-1)·hN^(-1)under 808 nm NIR laser radiation,being the highest values reported at atmospheric *** expect that this work could provide an alternative approach for photothermal catalysis N_(2)reduction under mild conditions.

关键词： polyoxometalate near-infrared photothermal catalysis N_(2)reduction mild condition