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Coercivity mechanism of high-performance anisotropic heterostructure SmCo5 magnets

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Journal of Rare Earths 2024年第10期42卷 1882-1888页

作者： Yuan Teng Yuqing Li Weiqiang Liu Xiaochang Xu Zhanjia Wang Jianjun Yang Dongtao Zhang Hongguo Zhang Qingmei lu Qiong Wu Weixing Xia Ming Yue Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of Technology School of Mechanical and Electrical Engineering Henan Institute of Science and Technology School of Mechanical Engineering Anyang Institute of Technology Key Laboratory of Magnetic Materials and Devices Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences

Due to its large magnetocrystalline anisotropy field and high Curie temperature,SmCo-based magnets are irreplaceable in high-temperature applications,The hot-deformed SmCo-based magnets are especially attractive for their excellent corrosion resistance,making them more suitable for harsh ***,it is still challenging for hot-deformed SmCo-based magnets to obtain high magnetization and high coercivity ***,it is necessary to analyze the relationship between its microstructure and magnetic properties and explore its magnetic hardening mechanism to guide the further improvement of magnetic *** this paper,the anisotropic heterostructure SmCo5magnet was prepared by combining large height-reduction and introducing a nano-grained Smrich *** c-axis texture,（bh）m of 16.1 MGOe,and Hciof 9.6 kOe were obtained via the heterostructure with SmCo5micron-grain and Sm-rich nano-scale *** magnetic domain observation and technical magnetization analysis demonstrate that the coe rcivity mechanism is dominated by *** results also show that the smooth and Sm-rich precipitated grain boundary provides weak pinning *** provides a reference for the development of high-pe rformance nanocrystalline SmCo5magnets.

关键词： Coercivity mechanism Heterostructure Hot-deformed SmCo magnet Permanent magnet Rare earths

Laccase/caffeic acid-catalyzed crosslinking coupled with galactomannan alters the conformational structure of ovalbumin and alleviates Th2-mediated allergic asthma

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Food Science and Human Wellness 2024年第4期13卷 1962-1973页

作者： Ishfaq Ahmed Suidong Ouyang Shengquan Wu Haochang Song Miaoyuan Zhang Renxing luo Peishan lu Jiaqi Deng Tingting Zheng Yanyan Wang Xinguang Liu Gonghua Huang Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics The First Dongguan Affiliated HospitalGuangdong Medical UniversityDongguan 523808China Haide College Ocean University of ChinaLaoshan CampusQingdao 266100China School of Medical Technology Guangdong Medical UniversityDongguan 523808China

Ovalbumin(OVA)is the major allergenic protein that can induce T helper 2(Th2)-allergic reactions,for which current treatment options are *** this study,we developed a polymerized hypoallergenic OVA product via laccase/caffeic acid(Lac/CA)-catalyzed crosslinking in conjunction with galactomannan(Man).The formation of high molecular weight crosslinked polymers and the Ig G-binding were analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE)and Western *** study indicated that Lac/CA-catalyzed crosslinking plus Man conjugation substantially altered secondary and tertiary structures of OVA along with the variation in surface *** digestion stability assay indicated that crosslinked OVA exhibited less resistance in simulated gastric fluid(SGF)and simulated intestinal fluid(SIF).Mouse model study indicated that Lac-Man/OVA ameliorated eosinophilic airway inflammatory response and efficiently downregulated the expression of Th2-related cytokines(interleukin(IL)-4,IL-5,and IL-13),and upregulated IFN-γand IL-10 *** of bone marrow-derived dendritic cells with Lac-Man/OVA suppressed the expression of phenotypic maturation markers(CD80 and CD86)and MHC class II molecules,and suppressed the expression levels of proinflammatory *** knowledge obtained in the present study offers an effective way to acquire a hypoallergenic OVA product that can have a therapeutic effect in alleviating OVA-induced allergic asthma.

关键词： Ovalbumin Laccase Galactomannan Conformational structure Asthma

Potential impact of specific therapy on pregnant women with pulmonary arterial hypertension without cardiac shunt:a descriptive study in northern China

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Emergency and Critical Care Medicine 2024年第2期4卷 60-66页

作者： Weida lu Min Li Fuqing Ji Hua Feng Guo Li Qiushang Ji Hongyu Zhang Xiaopei Cui Department of Geriatric Medicine&Shandong Key Laboratory Cardiovascular Proteomics Qilu Hospital of Shandong UniversityJinanShandongChina Intensive Care Unit of Cardiac Surgery Shandong Provincial Qianfoshan Hospitalthe First Hospital Affiliated with Shandong First Medical UniversityAffiliated Hospital of Shandong UniversityJinanShandongChina Department of Cardiology Linyi Central HospitalLinyiShandongChina Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Department of Pulmonary and Critical Care Medicine the Affiliated Hospital of Qingdao UniversityQingdaoShandongChina Department of Cardiology Qilu Hospital of Shandong UniversityJinanShandongChina

Background:Pregnancy in women with pulmonary arterial hypertension(PAH)is a fatal condition,despite the effectiveness of PAH-specific *** coverage status and effect of specific therapies in pregnant patients with PAH without cardiac shunts in China remain *** investigate this issue,we conducted a multicenter retrospective study in northern ***:The study included 85 patients who were admitted to 4 clinical centers in Shandong Province between October 2010 and August *** endpoint events included(1)maternal death and/or(2)major adverse cardiac events,both occurring during pregnancy or within 6 weeks ***:Although the overall mortality rate was encouraging(11.8%),the number of patients receiving PAH-specific therapies was extremely low(28.2%).Moreover,only 15.3%of patients received adequate duration of PAH-specific therapy(≥4 weeks)before delivery,and this subgroup showed the lowest major adverse cardiac events rate(7.7%)compared with that in the untreated(19.7%)and short-time treated groups(lusion:Pregnant patients with PAH without cardiac shunts face significantly increased mortality ***-term PAH-specific therapy does not guarantee favorable maternal *** screening,early identification,and timely intervention are expected to improve maternal outcomes in pregnant women with PAH.

关键词： Major adverse cardiac events Maternal mortality Pregnancy outcome Pulmonary arterial hypertension Specific therapy

Hydrogen production from chemical hydrogen storage materials over copper-based catalysts

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cMat 2024年第1期1卷 51-91页

作者： Jian-Jun Long Hao-Chong Wu Yuan-Ting Liu Yi-Yue Ding Qi-lu Yao Onder Metin Zhang-Hui lu Key Laboratory of Energy Catalysis and Conversion of Nanchang College of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchangChina Department of Chemistry College of SciencesKoc UniversityIstanbulTurkey

Hydrogen,as a clean and efficient energy source,is one of the important energy carriers in the ***,the safe storage and delivery of hydrogen is still a bottleneck in its practical *** hydrides(such as Nabh_(4),NH_(3)bh_(3),N_(2)H_(4)·H_(2)O,N_(2)H_(4)bh_(3),and HCOOH)are considered as potential chemical hydrogen storage materials that can achieve rapid on-site hydrogen *** present,the most critical issue for them is to develop economic catalysts to achieve efficient hydrogen production from chemical ***-per(Cu)is considered as a promising catalyst that is one of the most reactive metals among the first-row transition metals and economically *** this review,we outline the recent advancements of Cu-based catalysts in catalyzing hydrogen production from chemical ***,the synthesis methods,characterization techniques,and hydrogen production catalytic activity of Cu-based catalysts were also ***,a brief conclusion and outlook are given for the application of Cu-based catalysts in the dehydrogenation of chemical *** hope that this review will stimulate interest in the promising research area of Cu-based catalysts for the dehydrogenation of chem-ical hydrides.

关键词： catalysis chemical hydrides copper hydrogen production

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动画电影的“作者”问题刍议

四川戏剧 2024年第4期 80-83页

作者：戴璐南京传媒学院美术与设计学院南京大学艺术学院

动画电影因复合、多元的属性,关于其作者的问题需要有更为完全、综合的认识。本文通过梳理电影作者身份的几种范式,提出动画电影作者可从单数、复数意义上进行二分,而复数属性应被视为一种更为整全的动画电影作者认识论。针对多元作者... 详细信息

动画电影因复合、多元的属性,关于其作者的问题需要有更为完全、综合的认识。本文通过梳理电影作者身份的几种范式,提出动画电影作者可从单数、复数意义上进行二分,而复数属性应被视为一种更为整全的动画电影作者认识论。针对多元作者内部存在的“竞争”关系,以及部分作者身份的被遮蔽或错漏现象,文章呼吁建构全面、多维、统合的作者身份认识,实现具有本体意义上的动画电影作者之在场。

关键词：动画电影本体论作者论独立动画

Exact number of chord diagrams and an estimation of the number of spine diagrams of order n

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Chinese Science Bulletin 1997年第9期42卷 705-718页

作者： Li, bh Sun, HW Institute of Systems Science Chinese Academy of Sciences Beijing China

The main results are as follows:( i ) For the number of chord diagrams of order n, an exact formula is given.( ii ) For the number of spine diagrams of order n, the upper and lower bounds are obtained. These bounds show that the estimation is asymptotically the *** a byproduct, an upper bound is obtained, for the dimension of Vassiliev knot invariants of order n, that is, 1/2 ( n -1)! for any n≥3, and 1/2( n - 1)! - 1/2( n - 2)! for bigger n . Our upper bound is based on the work of Chmutov and Duzhin and is an improvement of their bound ( n - 1)! . For n = 3, and 4,1/2( n - 1)! is already the best.

关键词： knot Vassiliev invariant chord diagram spine diagram combinatorics.

Aging Effect on Elapsed Time of Serrations in Al-Li Single Crystals

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Journal of Materials Science & Technology 1998年第4期14卷 353-356页

作者： Tian, bh Yan, MG Chen, CQ Beijing Inst Aeronaut Mat Beijing 100095 Peoples R China Beijing Univ Aeronaut & Astronaut Beijing 100083 Peoples R China

Elapsed time of serrations in AI-Li single crystals was investigated with two definitions: one is the time elapsed in one cycle of serrations, the other is the average elapsed time within a strain limit. Elapsed time of individual serration appears independent on stress drops during serrated flow. It primarily distributes within the limits of short elapsed time in peak aged condition compared with underaged and overaged conditions, corresponding to low level of the average elapsed time that appears indifferent to increasing strain. It seems that shearing behaviour of delta' particles could be responsible for the variations in elapsed time of serrations.

关键词： Aluminum alloys

A BOUNDARY ELEMENT METHOD FOR CALCULATING ELASTIC WAVES SCATTERED BY AXISYMMETRIC INCluSION

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Acta Mechanica Solida Sinica 1998年第4期11卷 359-364页

作者： Liu, XG Zhong, WF Chen, bh Huazhong Univ Sci & Technol Dept Mech Wuhan 430074 Peoples R China

A Boundary Element Method(BEM) is;described to compute the scattering of elastic waves by an axisymmetric inclusion in an infinite elastic medium. The boundary loads applied to the inclusion is expanded in terms of Fourier series in an infinite space. The boundary integral equation is solved in the general direction of the axisymmetric inclusion by BEM The problem of the 3-D scattering of elastic waves is reduced to a 1-D one. According to the geometric features of the axisymmetric inclusion the ring shell elements are adopted in this method. A comparison is made with other BEM methods. The numerical results show this method can reduce the amount of calculation and enhance the speed of convergence.

关键词： inclusion wave scattering boundary element method

The preparation and properties of N-doped carbon materials and their use for sodium storage

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新型炭材料（中英文） 2024年第5期39卷 770-795页

作者： YUAN Ren-lu HOU Ruo-yang SHANG Lei LIU Xue-wei LI Ang CHEN Xiao-hong SONG Huai-he State Key Laboratory of Chemical Resources Engineering Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China

Defect engineering by heteroatom doping gives carbon materials some new characteristics such as a different electronic structure and a high electrochemical activity,making them suitable for high-performance applications.N-doping has been widely investigated because of its similar atom radius to carbon,high electronegativity as well as many different *** summarize the preparation methods and properties of N-doped carbon materials,and discuss their possible use in sodium ion *** relationships between N content/configuration and crystallinity,electronic conductivity,wettability,chemical reactivity as well as sodium ion storage performance are discussed.

关键词： N-doped carbon material N configuration Preparation method Performance Sodium storage