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Role of compositional changes on thermal,magnetic,and mechanical properties of Fe-P-C-based amorphous alloys

Chinese Physics B 2022年第1期31卷 472-479页

作者： Indah Raya Supat Chupradit Mustafa M Kadhim Mustafa Z Mahmoud Abduladheem Turki Jalil Aravindhan Surendar Sukaina Tuama Ghafel Yasser Fakri Mustafa alexander n Bochvar Chemistry Department Faculty of Mathematics and Natural ScienceHasanuddin UniversityMakassarSouth Sulawesi90245Indonesia Department of Occupational Therapy Faculty of Associated Medical SciencesChiang Mai UniversityChiang Mai50200Thailand Department of Dentistry Kut University CollegeKutWasit52001Iraq College of Technical Engineering The Islamic UniversityNajafIraq Department of Pharmacy Osol Aldeen University CollegeBaghdadIraq Department of Radiology and Medical Imaging College of Applied Medical SciencesPrince Sattam Bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Faculty of Health University of CanberraCanberraACTAustralia Faculty of Biology and Ecology Yanka Kupala State University of Grodno230023 GrodnoBelarus Department of Pharmacology Saveetha Dental College and HospitalSaveetha Institute of Medical and Technical SciencesChennaiIndia Scientific Research Center Al-Ayen UniversityThi-Qar64001Iraq Department of Pharmaceutical Chemistry College of PharmacyUniversity of MosulMosulIraq Department of Materials Physics Eotvos Lorand UniversityPázmány Péter sétány 1/ABudapest1117Hungary

This work aimed to tune the comprehensive properties of Fe-P-C-based amorphous system through investigating the role of microalloying process on the crystallization behavior,glass forming ability(GFA),soft magnetic features,and mechanical *** minor addition of elements into the system,it was found that the simultaneous microalloying of ni and Co leads to the highest GFA,which was due to the optimization of compositional heterogeneity and creation of near-eutectic ***,the FeConiCuPC amorphous alloy exhibited the best anelastic/viscoplastic behavior under the nanoindentation test,which was owing to the intensified structural fluctuations in the ***,the improved plasticity by the extra Cu addition comes at the expense of magnetic properties,so that the saturation magnetization of this alloying system is significantly decreased compared to the FeCoPC amorphous alloy with the highest soft magnetic *** total,the results indicated that a combination of added elemental constitutes,i.e.,Fe69Co5ni5Cu1P13C7 composition,provides an optimized state for the comprehensive properties in the alloying system.

关键词： Fe-based alloy saturation magnetization glass forming ability viscoplastic

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Structure, conductivity, and ion emission properties of RbAg4I5 solid electrolyte film prepared by pulsed laser deposition

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Chinese Physics B 2019年第6期28卷 126-130页

作者： Jun-Lian Chen Wen-Bin Zuo Xian-Wen Ke alexander B Tolstoguzov Can-Xin Tian neena Devi Ranjana Jha Gennady n Panin De-Jun Fu School of Printing and Packaging Wuhan UniversityWuhan 430072China Shenzhen Institute of Wuhan University A302 Research Bldg.No.6 Aoxin 2nd Rd.Nanshan Hitech ZoneShenzhen 518057China Ryazan State Radio Engineering University Gagarin Str.59/1390005 RyazanRussia School of Physics and Technology Lingnan Normal UniversityZhanjiang 524048China Department of Physics Netaji Subhas Institute of TechnologyUniversity of DelhiDwarka Sector-3New Delhi 110078India Institute of Microelectronics Technology Russian Academy of SciencesChernogolovkaMoscow 142432Russia

We fabricated a silver ion emitter based on the solid state electrolyte film of RbAg4 I5 prepared by pulsed laser deposition. The RbAg4 I5 target for PLD process was mechano-chemically synthesized by high-energy ball milling in Ar atmosphere using β-AgI and RbI as raw materials. The ion-conducting properties of RbAg4 I5 were studied by alternating current(AC) impedance spectroscopy and the ionic conductivity at room temperature was estimated 0.21 S/m. The structure, morphology, and elemental composition of the RbAg4 I5 film were investigated. The Ag+ ion-conducting property of the prepared superioni-conductor film was exploited for ion–beam generation. The temperature and accelerating voltage dependences of the ion current were studied. Few nA current was obtained at the temperature of 196?C and the accelerating voltage of 10 kV.

关键词： RbAg4 I5 ball milling solid state electrolyte film ion–beam source ionic conductivity

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The mechanisms of color production in black skin versus red skin on the heads of new World vultures

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Avian Research 2023年第1期14卷 86-92页

作者： nicholas M.Justyn Matthew J.Powers Geoffrey E.Hill Kayla alexander Adrián naveda-Rodríguez Scott A.Rush Department of Biological Sciences Auburn UniversityAuburnALUSA College of Veterinary Medicine Mississippi State UniversityMississippiStateMSUSA Department of Wildlife Fisheriesand AquacultureMississippi State UniversityMississippi StateMSUSA

A determination of how the color of animal integument is produced is a starting point for investigations into the function and evolution of *** mechanisms that give rise to the color of bare skin of new World vultures are largely ***,we investigate the source of color production in the bare skin of Turkey Vultures(Cathartes aura)and Black Vultures(Coragyps atratus).Using UV-vis reflectance spectroscopy,we found evidence that hemoglobin is the primary pigment responsible for the red coloration of the bare skin on the heads of Turkey Vultures,and that eumelanin is responsible for the black coloration of the bare skin on the heads of Black *** microscopy of incisional skin samples further supported these mechanisms of color production by revealing the presence of numerous blood vessels near the surface of the Turkey Vulture skin,and a high concentration of melanosomes in the skin of Black *** high performance liquid chromatography(HPLC),we detected carotenoids within the skin of both species with significantly higher total concentrations of carotenoids in the skin of Turkey Vultures compared to the skin of Black *** carotenoids detected were dietary carotenoids that typically produce yellow coloration when accumulated in integument and were present in low *** hypothesize that the dietary carotenoids present do not contribute to the color of the skin,but rather help to compensate for the lack of melanosomes found in Turkey Vulture *** presence of additional carotenoids may act as an antioxidant to minimize UV damage when the bare Turkey Vulture head skin is exposed to direct sunlight for prolonged periods of time when soaring and scavenging for food.

关键词： Carotenoids Cathartes aura Coragyps atratus Hemoglobin High performance liquid chromatography Melanosomes Skin biopsies

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Submonolayer Eu superstructures—A class of 2D magnets

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nano Research 2023年第1期16卷 1500-1506页

作者： Dmitry V.Averyanov Ivan S.Sokolov alexander n.Taldenkov Oleg E.Parfenov Andrey M.Tokmachev Vyacheslav G.Storchak national Research Center“Kurchatov Institute” Kurchatov Sq.1Moscow 123182Russia

Two-dimensional(2D)magnetic materials promise unconventional properties and quantum phases as well as advances in ultracompact *** of 2D magnets often reaches a single monolayer but in general can go beyond this limit,as demonstrated by 2D magnetism of submonolayer Eu superstructures coupled with *** question is whether the submonolayer magnetism constitutes a general ***,we demonstrate that regular Eu lattices form a class of 2D magnets displaying various structures,stoichiometries,and chemical *** synthesized and studied a set of Eu superstructures on Ge(001).Their magnetic properties are consistent with the emergence of a magnetic order such as ferro-or *** particular,control over the magnetic transition temperature by weak magnetic fields indicates the 2D nature of the *** together,Eu/Ge and Eu/Si superstructures seed a nucleus of the research area addressing the emergence of magnetism in submonolayer chemical species.

关键词： two-dimensional(2D)magnetism submonolayer superstructure surface reconstruction germanium

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绿原酸通过减轻心肌细胞铁死亡改善心力衰竭（英文）

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Journal of Traditional Chinese Medical Sciences 2024年第2期 191-198页

作者：黄凯李芳赫唐家杨普海崟 Sukhorukov,Vasily orekhov,alexander n. 郭淑贞北京中医药大学中医学院俄罗斯医学科学院病理生理学研究所血管病理学实验室

目的：绿原酸（CGA）是一种普遍存在于传统中药和食物中的多酚类化合物，包括金银花、杜仲叶、茶和咖啡。本文的目的是阐明绿原酸对心肌细胞铁死亡和心力衰竭的影响。方法：我们通过运用主动脉缩窄（TAC）诱导的心力衰竭小鼠模型，评估... 详细信息

目的：绿原酸（CGA）是一种普遍存在于传统中药和食物中的多酚类化合物，包括金银花、杜仲叶、茶和咖啡。本文的目的是阐明绿原酸对心肌细胞铁死亡和心力衰竭的影响。方法：我们通过运用主动脉缩窄（TAC）诱导的心力衰竭小鼠模型，评估了绿原酸对心脏功能的影响，具体指标包括左室射血分数（LVEF）、分数缩短（LVFS）、舒张末期容积（LVEDV）、收缩末期容积（LVESV）、收缩末期直径（LVESD）和舒张末期直径（LVEDD）。同时建立了异丙肾上腺素（ISO）诱导的H9c2心肌细胞模型，并用不同浓度的绿原酸进行干预。为了评估绿原酸对心肌细胞铁死亡的影响，我们检测了细胞活性，并使用荧光染色评估了细胞内活性氧（ROS）、亚铁离子（Fe2+）和脂质过氧化物的水平。为了明确绿原酸调控铁死亡的信号通路，我们使用western blot检测了H9c2心肌细胞和小鼠心肌组织中铁死亡生物标志物的表达，如溶质载体家族7成员11(SLC7A11)和谷胱甘肽过氧化物酶4(GPX4)。结果：绿原酸显著增强了小鼠心脏功能指标，如LVEF、LVFS、LVEDV、LVESV、LVESD和LVEDD。异丙肾上腺素诱导的H9c2心肌细胞显示出降低的细胞活性及升高的ROS水平、Fe2+含量和脂质过氧化水平，然而，绿原酸显著改善了这些变化。此外，在H9c2心肌细胞和TAC小鼠心肌组织中，绿原酸增加铁死亡相关的蛋白表达，如SLC7A11和GPX4。结论：绿原酸具有通过SLC7A11/GPX4信号通路增强心脏功能，减少心肌细胞中的脂质过氧化、ROS水平和心肌细胞铁死亡的作用。这些结果为绿原酸的临床应用和心力衰竭的治疗提供了新的见解。

关键词：绿原酸心力衰竭铁死亡 H9c2心肌细胞中医药

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Creativity real and imagined in architectural education

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Frontiers of Architectural Research 2014年第3期3卷 331-333页

作者： alexander Tzonis Department of Architecture University of Technology Delft Delft 2611 CE The Netherlands

Of all aspects of architecture what mystifies most the layman is the power of architects as ＇creators＇, their apparent capability to invent, conceive and construct ＇out of nothing＇ unprecedented daring forms.

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基于石墨烯的光学控制窄带太赫兹开关（英文）

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中国光学 2018年第2期11卷 166-173页

作者： GREBEnCHUKOV alexander n ZAITSEV Anton D KHODZITSKY Mikhail K ITMO University Saint-Petersburg 197101Russia

本文提出了一种光控太赫兹开关,该开关采用覆盖单层石墨烯的十字金属谐振器超表面。利用石墨烯表面电导率模型和有限元法计算了这种复合结构的光谱特性。模拟结果表明,在0.2 W/mm^2的光泵浦后,传输谱(调制深度为36.8%,Q-因子为250)出现... 详细信息

本文提出了一种光控太赫兹开关,该开关采用覆盖单层石墨烯的十字金属谐振器超表面。利用石墨烯表面电导率模型和有限元法计算了这种复合结构的光谱特性。模拟结果表明,在0.2 W/mm^2的光泵浦后,传输谱(调制深度为36.8%,Q-因子为250)出现了窄带共振衰减现象。另外,这种衰减的调制深度可以通过改变泵浦强度微调节。因此,光学可调谐太赫兹开关的设计将有助于太赫兹通信应用的功能组件开发。

关键词：太赫兹石墨烯光开关器件

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Linking tree growth rate, damage repair, and susceptibility to a genus-specific pest infestation

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Journal of Forestry Research 2019年第5期30卷 1935-1941页

作者： Kayla n.Boyes Kathryn G.Hietala-Henschell alexander P.Barton Andrew J.Storer Jordan M.Marshall Department of Biology Purdue University Fort WayneFort WayneIN 46805USA School of Forest Resources and Environmental Science Michigan Technological UniversityHoughtonMI 49931USA

Pest preference and subsequent susceptibility of a host individual is likely related to previous growth patterns in that *** ash borer(Agrilus planipennis Fairmaire)is a pestiferous beetle introduced to north America from *** all species of ash are susceptible to attack,some individual trees appear to survive *** selected ash trees in southeastern Michigan,collected cores and categorized trees as high tolerance to emerald ash borer attack(high overall health,low crown dieback),low tolerance(low overall health,high crown dieback)and intermediate tolerance(in-between the other categories).We artificially wounded trees and measured wound closure after 3 *** width indices were not correlated between high and low tolerance *** slopes comparing growth and years were significantly different between the three tolerance categories,with high tolerance trees having the steepest *** closure was greatest in high tolerance *** tolerance trees demonstrating more rapid(steeper regression slope),consistent(lower variance),and effective(greater wound closure)*** vigorously growing trees likely had more capacity to repair damage caused by emerald ash borer,leading to healthier trees in our *** previous host growth patterns to health may have implications related to identifying individual trees potentially tolerant to attack.

关键词： Agrilus Ash Dendrochronology Emerald ash borer Fraxinus Invasive species

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Quantum Yang-Baxter equation and constant R-matrix over Grassmann algebra

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2005年第10期6卷 1065-1079页

作者： DUPLIJ Steven KOTULSKA Olga SADOVnIKOV alexander Department of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 UkraineDepartment of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 UkraineDepartment of Physics and Technology V.N. Karazin Kharkov National University Svoboda Sq. 4 Kharkov 61077 Ukraine

Constant solutions to Yang-Baxter equation are investigated over Grassmann algebra for the case of 6-vertex R-matrix. The general classification of all possible solutions over Grassmann algebra and particular cases with 2,3,4 generators are studied. As distinct from the standard case, when R-matrix over number field can have a maximum 5 nonvanishing elements, we obtain over Grassmann algebra a set of new full 6-vertex solutions. The solutions leading to regular R-matrices which appear in weak Hopf algebras are considered.

关键词： Constant solution Grassmann algebra Regularity R-matrix

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大功率离子推力器和流动控制单元验证现状及其2000小时寿命试验（英文）

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推进技术 2020年第1期41卷 109-120页

作者： alexander S Lovtsov Michael Y Selivanov Andrey n Kostin Andrey A Shagayda Keldysh Research Center

为了发展基于电推进的大功率空间运输系统,需要开发和验证功率达数十千瓦的电推进系统,深空任务电推进系统优化的比冲要求高达105s。凯尔迪什研究中心(KeRC)正在开发这样的电推进部件。本文概述了35kW离子推力器IT-500及其流动单元FCU-... 详细信息

为了发展基于电推进的大功率空间运输系统,需要开发和验证功率达数十千瓦的电推进系统,深空任务电推进系统优化的比冲要求高达105s。凯尔迪什研究中心(KeRC)正在开发这样的电推进部件。本文概述了35kW离子推力器IT-500及其流动单元FCU-500的验证现状。作为其验证的一部分,完成了IT-500和FCU-500的2000h寿命试验。其中,离子推力器大部分验证条件是:输入功率17.8kW,使用了40kg氙,2018h寿命试验。本文介绍了磁场和离子光学以及石墨格栅开发现状。

关键词：离子推力器大功率放电室离子光学

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