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Significant effect of ordered micro-domain on cell boundary phase distribution and demagnetization curve squareness of Sm_(2)Co_(17)-type magnet

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Rare Metals 2024年第4期43卷 1724-1735页

作者： Zhuang Liu hai-chen Wu Chao-Yue Zhang Chao-Qun Zhu Guo-Xin chen Huan-Ming Lu Ren-Jie chen Aru Yan CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China

Cu-rich cell boundary phase is difficult to precipitate evenly,resulting in a generally poor demagnetization curve squareness for Fe-rich Sm_(2)Co_(17)-type magnet,which is a key factor limiting the further improvement of magnetic energy *** this study,we report that nanoscale strip-like ordered micro-domains distributed in1:7H disordered matrix phase of the solid solution precursor is a new factor significantly affecting the precipitation and distribution of the cell boundary *** strip-like and continuous micro-twin structure with twin boundaries neatly perpendicular to the C-axis is observed after sintering *** solution treatment,sequential and long strip-like micro-twins gradually transform into disordered state along the basal plane,forming narrow disordered 1:7H(TbCu_(7)-type structure)phase between the separated strip-like ordered *** disordering transformation takes place via broken down of the long strip-like ordered micro-domains,which is accomplished by narrowing along the width direction followed by reduction of the ***,a new model revealing the effect of the ordered micro-domains on the formation of the cell boundary phase is *** boundaries enriched in Cu have already existed in the precursor with long strip-like ordered ***,the Cu-rich cell boundary phase acting as strong pinning centers cannot be precipitated homogeneously and distributed continuously after aging,resulting in a poor demagnetization curve squareness of Sm_(2)Co_(17)-type *** results indicate that significant broken down of the nanoscale ordered micro-domains in solution precursor is the key factor improving the distribution of cell boundary phase in Sm_(2)Co_(17)-type magnets.

关键词： Sm_(2)Co_(17) magnets Solution precursor Ordered micro-domains Disordering transformation Cellular structure

Investigating the Absorption and Desorption Behavior of Methylene Chloride in the Poly(aryl ether ketone) Film with Different Crystallinities

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Chinese Journal of Polymer Science 2024年第2期42卷 239-246,I0009页

作者： Hong-Ru Yang Jin-Dong Zhang Dong-Ting Gao Gang Liu Chun-hai chen Jia-Nan Yao Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China

Poly(aryl ether keton e)(PAEK) films with different crystallinities were obtained by controlling the cooling rate,which were subjected to the absorption and desorption of methylene chloride(CH_(2)Cl_(2)).We employed attenuated total reflection Fourier transform infrared(ATR-FTIR)spectroscopy analyses to investigate the diffusion behavior of CH_(2)Cl_(2) in PAEK films with different *** to the Fickian diffusion model,the calculated diffu sion coefficients of CH_(2)Cl_(2) in PAEK films were observed to decrease with increasing *** effect of CH_(2)Cl_(2)absorption and desorption on the mechanical properties of PAEK films with different crystallinity was further analyzed using tensile *** tensile tests exhibited that CH_(2)Cl_(2) has two concurrent effects:plasticization and solvent-induced *** scanning calorimetry(DSC) and wide-angle X-ray diffraction(WXRD) techniques further confirmed solvent-induced crystallization *** results would be beneficial to understand the solvent resistance of PAEK materials and consequently provide the practical application conditions of PAEK with a theoretical basis.

关键词： Poly(aryl ether ketone) Diffusion behavior Infrared spectra Solvent-induced crystallization Mechanical properties

Coinfection of SARS-CoV-2 Omicron variant and other respiratory pathogens in children

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World Journal of Pediatrics 2024年第1期20卷 92-96页

作者： Wei Li Bing-Han Wang Bao-hai chen Yi Sun Lin Li Wen-Qing Xiang Ahmed Faisal Ali Lin-Xuan Su hai-Yan Mao Hong-Qiang Shen Qiang Shu Department of Clinical Laboratory Children's HospitalNational Clinical Research Center for Child HealthZhejiang University School of MedicineHangzhouChina School of Public Health Zhejiang University School of MedicineHangzhouChina Department of Information Center Children's HospitalZhejiang University School of MedicineHangzhouChina Zhejiang Provincial Center for Disease Control and Prevention HangzhouChina Department of Thoracic&Cardiovascular Surgery Children's HospitalNational Clinical Research Center for Child HealthZhejiang University School of MedicineHangzhouChina

Since the outbreak of coronavirus disease 2019(COVID-19),the entire world has been affected by the epidemic[1,2].On November 9,2021,a variant of the novel coronavirus B.1.1.529 was detected for the first time from case samples in South *** Omicron strain spread and mutated significantly *** variant has the characteristics of escape immunity,which can induce relatively extreme disease and reduce the neutralization of antibodies in vaccinators,and is more likely to be reinfected[3,4].The clinical presentation of severe acute respiratory syndrome coronavirus 2(SARSCoV-2)in children has mild symptoms and a lower risk of hospitalization and death.

关键词： respiratory immunity acute

Stability Switches of a Double-delayed Mussel-algae System

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Acta Mathematicae Applicatae Sinica 2024年

作者： Zhi-chao JIANG Jing-hua HE Bo-hai chen School of Liberal Arts and Sciences North China Institute of Aerospace Engineering

The stable switching phenomenon of a diffusion mussel-algae system with two delays and half saturation constant is studied. The stability of positive equilibrium and the existence of Hopf bifurcation on two-delay plane are investigated by calculating the stability switching curves. The normal form on the central manifold near Hopf bifurcation point is also derived. It can find that two different delays can induce the stable switches which cannot occur with the same delays. Through numerical simulations, the region of complete stability of system increases with the increase of half-saturation constant, indicating that the half-saturation constant contributes to the stability of system. In addition, double Hopf bifurcations may occur due to the intersection of bifurcation curves. These results show that two different delay and half-saturation constant have important effects on the system. The numerical simulation results validate the correctness of the theoretical analyses.

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FAM53B promotes pancreatic ductal adenocarcinoma metastasis by regulating macrophage M2 polarization

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World Journal of Gastrointestinal Oncology 2024年第4期16卷 1479-1499页

作者： Xuan-Zeng Pei Min Cai Da-Wei Jiang Song-hai chen Qing-Qing Wang Hui-Min Lu Yi-Fan Lu Department of Hepatological Surgery The First Hospital of JiaxingJiaxing 314000Zhejiang ProvinceChina Department of General Surgery West China Hospital of Sichuan UniversityChengdu 610044Sichuan ProvinceChina

BACKGROUND Our study investigated the role of FAM53B in regulating macrophage M2 polarization and its potential mechanisms in promoting pancreatic ductal adenocarcinoma(PDAC)*** To further investigate the role of FAM53B in regulating macrophage M2 polarization and its potential mechanism in promoting PDAC *** goal is to determine how FAM53B affects macrophage M2 polarization and to define its underlying mechanism in PDAC *** Cell culture and various experiments,including protein analysis,immunohisto-chemistry,and animal model experiments,were *** compared FAM53B expression between PDAC tissues and healthy tissues and assessed the correlation of FAM53B expression with clinical *** study analyzed the role of FAM53B in macrophage M2 polarization in vitro by examining the expression of relevant ***,we used a murine model to study the role of FAM53B in PDAC metastasis and analyzed the potential underlying *** Our research showed that there was a significant increase in FAM53B levels in PDAC tissues,which was linked to adverse tumor *** findings indicated that FAM53B can enhance macrophage M2 polarization,leading to increased anti-inflammatory factor *** results from the mouse model further supported the role of FAM53B in PDAC metastasis,as blocking FAM53B prevented tumor cell invasion and *** FAM53B promotes PDAC metastasis by regulating macrophage M2 *** discovery could lead to the development of new strategies for treating *** example,interfering with the FAM53B signaling pathway may prevent cancer *** research findings also provide important information for expanding our understanding of PDAC pathogenesis.

关键词： FAM53B Pancreatic ductal adenocarcinoma Tumor metastasis Macrophage polarization

Phase structure evolution and its effect on magnetic and mechanical properties of B-doped Sm_(2)Co_(17)-type magnets with high Fe content

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Chinese Physics B 2024年第9期33卷 582-588页

作者： Yao-Wen Li Zhuang Liu hai-chen Wu Fang Wang Chao-Qun Zhu Dong-Liang Tan Yu Liu Yang Yang Ming-Xiao Zhang Ren-Jie chen A-Ru Yan Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry ofEducation&School of Chemistry and Materials Science Shanxi Normal UniversityTaiyuan 030032China CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute ofMaterial Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China

The unique cellular microstructure of Fe-rich Sm_(2)Co_(17)-type permanent magnets is closely associated with the structure of the solid solution *** investigate the phase structure,magnetic properties,and mechanical behavior of B-doped Sm_(2)Co_(17)-type magnets with high Fe *** doped B atoms can diffuse into the interstitial vacancy,resulting in lattice expansion and promote the homogenization of the phase organizational structure during the solid solution treatment in ***,the resulting second phase plays a dominant role to result in more microtwin structures and highly ordered 2:17R phases in the solid solution stage,which inhibits the ordering transformation of 1:7H phase during aging and affects the generation of the cellular structure,and to result in a decrease in magnetic properties,yet the interface formed between it and the matrix phase hinders the movement of dislocations and enhances the mechanical ***,the precipitation of high flexural strain grain boundary phase induced by B element doping is also a new and effective way to improve the flexural strain of Sm_(2)Co_(17)-type *** study provides a new understanding of the phase structure evolution and its effect on the magnetic and mechanical properties of Sm_(2)Co_(17)-type magnets with high Fe content.

关键词： Sm_(2)Co_(17)-type magnets magnetic and mechanical properties

关于“民族主义问题”在西方音乐史学研究中的再思考

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中央音乐学院学报 2024年第2期175卷 133-149页

作者：陈海哈尔滨音乐学院

当前西方音乐史学研究中“民族主义问题”越发成为研究热点。自达尔豪斯以来,音乐民族主义的研究范式逐渐发生转变,进入21世纪,塔拉斯金的《牛津西方音乐史》和吉姆·萨姆森主编的《剑桥十九世纪音乐史》(属系列丛书《剑桥音乐史》),在... 详细信息

当前西方音乐史学研究中“民族主义问题”越发成为研究热点。自达尔豪斯以来,音乐民族主义的研究范式逐渐发生转变,进入21世纪,塔拉斯金的《牛津西方音乐史》和吉姆·萨姆森主编的《剑桥十九世纪音乐史》(属系列丛书《剑桥音乐史》),在音乐民族主义问题的书写上,既继承了达尔豪斯以来的书写观念,又呈现了不同的民族主义理论视角和态度。笔者认为,两位学者关于音乐民族主义叙史观存在现代与后现代的差异,在研究视角上又联结了族群-象征主义的历史记忆与大众影响,在史学态度上集合了本质主义与非本质主义的探讨。梳理两位学者对于音乐民族主义问题书写观念、方法与价值观的异同,必然对西方学界关于民族主义在音乐史书写中的新世纪转向,有着新的理解与思考,并对中国当下西方音乐史研究与书写产生重要的理论参考意义。

关键词：塔拉斯金吉姆·萨姆森音乐史学民族主义

Long noncoding RNA steroid receptor RNA activator 1 inhibits proliferation and glycolysis of esophageal squamous cell carcinoma

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World Journal of Gastrointestinal Oncology 2024年第10期16卷 4194-4208页

作者： Ming He Ye Qi Ze-Mao Zheng Min Sha Xiang Zhao Yu-Rao chen Zheng-hai chen Rong-Yu Qian Juan Yao Zheng-Dong Yang Department of Radiation Oncology Huai’an Hospital of Huai’anHuai’an 223299Jiangsu ProvinceChina Department of Nursing Huai’an Hospital of Huai’anHuai’an 223299Jiangsu ProvinceChina Institute of Clinical Medicine Taizhou People's Hospital Affiliated of Nantong University of MedicineTaizhou 225300Zhejiang ProvinceChina Department of Thoracic Surgery Huai’an Hospital of Huai’anHuai’an 223299Jiangsu ProvinceChina

BACKGROUND The clinical effects and detailed roles of long non-coding RNA(LncRNA)steroid receptor RNA activator 1(SRA1)in esophageal squamous cell carcinoma(ESCC)remain *** the present study,the complementary sites between lncRNA SRA1,miRNA-363-5p,and phospholysine phosphohistidine inorganic pyrophosphate phosphatase(LHPP)predicted via bioinformatics analysis stimulated us to hypothesize that miRNA-363-5p/LHPP axis might be required for SRA1-mediated ESCC *** To investigate the molecular events of SRA1 in the malignant behavior in *** Thirty-eight ESCC tissues and paired adjacent normal tissues were ***1 expression was detected in ESCC tissues and cell lines using quantitative reverse transcription-polymerase chain *** counting Kit-8 assay,transwell invasion assay,glycolysis assay,and xenograft tumor model were performed to address the malignant biological behaviors of ESCC cells after the introduction of *** t-test and theχ2 test were used for comparison between *** curve analysis was performed using the Kaplan-Meier *** SRA1 downregulation was identified in *** patients exhibiting a low SRA1 expression faced shorter overall survival than those with a high SRA1 *** introduction of SRA1 inhibited cell proliferation,glucose uptake,and lactate production in *** vivo,the growth of ESCC was hindered by SRA1 ***,SRA1 overexpresses the LHPP by inhibiting ***,the introduction of small interfering RNA si-LHPP or miRNA-363-5p mimic could abrogate the inhibition roles triggered by *** SRA1 inhibits the oncogenicity of ESCC via miRNA-363-5p/LHPP *** SRA1/miRNA-363-5p/LHPP pathway may be a therapeutic target for ESCC.

关键词： Steroid receptor RNA activator 1 Esophageal squamous cell carcinoma Phospholysine phosphohistidine inorganic pyrophosphate phosphatase Cancer therapy MicroRNA Long non-coding RNA

创新水平视角下数字经济对环境污染的影响——以长江经济带40个沿线城市为例

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长江流域资源与环境 2024年第1期33卷 126-138页

作者：陈祖海符斌中南民族大学经济学院湖北武汉430074 中国武陵山乡村发展研究院湖北武汉430074

数字经济发展迅速,探究数字经济对环境污染的影响和作用机制,对于推动长江经济带高质量发展具有重要意义。基于2011~2019年长江经济带沿线40个地级及以上城市的面板数据,探讨创新水平在数字经济与环境污染之间的作用机制,利用门槛效应... 详细信息

数字经济发展迅速,探究数字经济对环境污染的影响和作用机制,对于推动长江经济带高质量发展具有重要意义。基于2011~2019年长江经济带沿线40个地级及以上城市的面板数据,探讨创新水平在数字经济与环境污染之间的作用机制,利用门槛效应模型分析其非线性关系及作用区间,进一步借助空间杜宾模型考察数字经济产生的空间溢出效应。结果表明:(1)数字经济对于本地的环境污染具有显著的抑制作用,且经过多种稳健性检验,结论依然成立。(2)创新水平是数字经济影响环境污染的重要路径,且当创新水平超过门槛值6.41后,数字经济对于环境污染的影响系数将从-0.024变为-0.042,存在边际递增的治污效果。(3)在抑制本地环境污染的同时数字经济的空间溢出效应会加剧周边地区的污染排放;产量规模的扩张可能成为污染加剧的原因,数字经济对环境污染的抑制效果被生产规模扩大带来的污染增长所覆盖;为此,需要加强地区间协同治理,避免生产规模的不合理稀释数字经济的治污效果。

关键词：数字经济创新水平环境污染门槛效应空间溢出长江经济带