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Elucidating elusive quaternary selenide EuCeCuSe3:Synthesis,crystal structure,properties and theoretical studies

Journal of Rare Earths 2024年第1期42卷 163-171,I0006页

作者： Maxim V.Grigoriev Anna V.Ruseikina Maxim S.Molokeev Vladimir A.Chernyshev Aleksandr S.Aleksandrovsky alexander S.Krylov Svetlana N.Krylova Nikolai P.Shestakov Dmitriy A.Velikanov alexander A.Garmonov Alexey V.Matigorov Evgeny A.Ostapchuk Thomas Schleid Damir A.Safin Laboratory of Theory and Optimization of Chemical and Technological Processes University of TyumenVolodarskogo Str.6625003TyumenRussian Federation Kirensky Institute of Physics Federal Research Center KSC SB RASAkademgorodok 50 Bld.38660036KrasnoyarskRussian Federation Department of Physics Far Eastern State Transport UniversitySerysheva Str.47680021KrasnoyarskRussian Federation Institute of Natural Sciences and Mathematics Ural Federal University Named After the First President of Russia B.N.YeltsinMira Str.19620002EkaterinburgRussian Federation Department of Photonics and Laser Technology Siberian Federal UniversitySvobodnii Ave.79660079KrasnoyarskRussian Federation Institute of Physics and Technology University of TyumenVolodarskogo Str.6625003 TyumenRussian Federation Institute for Inorganic Chemistry University of StuttgartPfaffenwaldring 55D-70569StuttgartGermany Scientific and Educational and Innovation Center for Chemical and Pharmaceutical Technologies Ural Federal University named after the First President of Russia B.N.YeltsinMira Str.19620002 EkaterinburgRussian Federation University of Tyumen Volodarskogo Str.6625003TyumenRussian Federation

We report on the novel heterometallic quaternary selenide EuCeCuSe3,the fabrication of which has been a challenge until this *** structure of the reported selenide was elucidated from the powder X-ray diffraction data,which revealed the formation of EuCeCuSe3with excellent yield(96.7%)accompanied with a minor fraction of CeSe2(3.3%),and was best solved in orthorhombic space group Pnma with the BaLaCuS3structural ***,the crystal structure of the title compound completes the row of the heterometallic quaternary selenides EuRECuSe3(RE=La,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,er,Tm,Yb,Lu,Y),of which the cerium-based derivative exclusively belongs to the BaLaCuS3structural *** distortion of the CuSe4polyhedron was compared for the whole series of EuRECuSe3compounds using theτ4-descriptor for four coordinated ions,which revealed the highest degree of distortion for the Ce3+-containing selenide,followed by the La3+-based ***,the crystallographic and geometrical parameters of the reported selenide were discussed in comparison to the Ce3+-based sulfides SrCeCuS3and *** initio calculations of the crystal structure,a phonon spectrum and elastic constants for the crystal of EuCeCuSe3were also *** types and wavenumbers of fundame ntal modes were determined and the involvement of ions participating in the phonon modes was *** experimental IR spectrum of the reported selenide was interpreted and found to be in agreement with the calculated *** experimental direct band gap of EuCeCuSe3was measured to be 1.36 eV that is consistent with the concept of its origin due to interband transitions between orbitals emerging mainly from 4f(valence band)and 5d(conduction band)levels of the Eu2+*** dependence of the Young’s modulus on the direction demonstrates the anisotropy of the elastic properties,while the Vickers hardness for EuCeCuSe3was calculated to be 5.2 ***,the title compound is paramagnetic above 4 K.

关键词： Quaternary selenide Synthesis Crystal structure Ab initio calculations Magnetic measurements Spectroscopy

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Direct measurement of the break-out ^(19)F(p,γ)^(20)Ne reaction in the China Jinping underground laboratory(CJPL)

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Nuclear Science and Techniques 2024年第8期35卷 142-152页

作者： Yin‑Ji Chen Hao Zhang Li‑Yong Zhang Jian‑Jun He Richard James deBoer Michael Wiescher alexander Heger David Kahl Jun Su Daniel Odell Xin‑Yue Li Jian‑Guo Wang Long Zhang Fu‑Qiang Cao Zhi‑Cheng Zhang Xin‑Zhi Jiang Luo‑Huan Wang Zi‑Ming Li Lu‑Yang Song Liang‑Ting Sun Qi Wu Jia‑Qing Li Bao‑Qun Cui Li‑Hua Chen Rui‑Gang Ma er‑Tao Li Gang Lian Yao‑De Sheng Zhi‑Hong Li Bing Guo Wei‑Ping Liu Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Department of Physics and Astronomy The Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia Facility for Rare Isotope Beams Michigan State UniversityEast LansingMI 48824USA Institute of Nuclear and Particle Physics and Department of Physics and Astronomy Ohio UniversityAthensOH 45701USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China China Institute of Atomic Energy Beijing 102413China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China College of Science Southern University of Science and TechnologyShenzhen 518055China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Mathematics and Physics Handan UniversityHandan 056005China

Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in *** one possible nucleosynthesis scenario,break-out from the hot carbon–nitrogen–oxygen(HCNO)cycle was thought to be the source of the calcium observed in these oldest ***,according to the stellar modeling,a nearly tenfold increase in the thermonuclear rate ratio of the break-out ^(19)F(p,γ)^(20) Ne reaction with respect to the competing ^(19)F(p,α)^(16) O back-processing reaction is required to reproduce the observed calcium *** performed a direct measurement of this break-out reaction at the China Jinping underground *** measurement was performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-mass *** key resonance was observed at 225.2 keV for the first *** a temperature of approximately 0.1 GK,this new resonance enhanced the thermonuclear ^(19)F(p,γ)^(20) Ne rate by up to a factor of≈7.4,compared with the previously recommended NACRE *** is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their“warm”CNO cycle through the ^(19)F(p,γ)^(20) Ne reaction than previously *** break-out resulted in the production of the calcium observed in the oldest stars,enhancing our understanding of the evolution of the first stars.

关键词： Nuclear astrophysics First stars Abundance of calcium Reaction cross section Reaction rate China Jinping underground laboratory(CJPL) JUNA

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Synchronized ventilation during resuscitation in pigs does not necessitate high inspiratory pressures to provide adequate oxygenation

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World Journal of Emergency Medicine 2023年第5期14卷 393-396页

作者： Miriam Renz Raphael RenéCinto Noack RenéRissel Katja Mohnke Julian Riedel Bastian Dunges alexander Ziebart erik Kristoff er Hartmann Robert Rummler Department of Anesthesiology University Medical CenterJohannes Gutenberg UniversityMainz 55131Germany

The optimal ventilation method for patients suffering from cardiac arrest and receiving cardiopulmonary resuscitation(CPR)remains unclear,and the recent guidelines do not provide detailed information.[1-3]During CPR,changing thoracic pressures due to chest compressions and ventilation pressure infl uence venous return and cardiac output,respectively.[4-6]Novel mechanical ventilation modes that are synchronized to chest compressions may improve blood flow and oxygenation.[4]In this porcine trial,we investigated the feasibility of a specially designed chest compression synchronized ventilation(CCSV)mode with peak pressures limited to 40 mbar(1 mbar=0.1 kPa)and an experimental synchronized ventilation(SV)limited to 20 mbar,respectively,intended to achieve a more lung-protective ventilation pattern during *** evaluated whether the diff erent synchronized pressure levels ameliorate hemodynamics,gas exchange and pulmonary function and compared it to intermittent positive pressure ventilation(IPPV).

关键词： resuscitation protective cardiac

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Optical in vivo and ex vivo imaging of glioma cells migration via the cerebral vessels:Prospective clinical application of the beta2-adrenoreceptors blockade for glioma treatment

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Journal of Innovative Optical Health Sciences 2018年第4期11卷 98-107页

作者： Olga Pavlova alexander Shirokov alexander Fomin Nikita Navolokin Andrey Terskov alexander Khorovodov Anton Namykin Alexey Pavlov Valery Tuchin Oxana Semyachkina-Glushkovskaya Interdisciplinary Center of Critical Technologies in Medicine Saratov State University 83 Astrakhanskaya Str.Saratov 410012Russia Institute of Biochemistry and Physiology of Plants and Microorganisms Russian Academy of Sciences13 Entuziastov Ave.Saratov 410049Russia Saratov State Medical University 112 Bolshaya Kazachia Str. Saratov 410012Russia Department of Optics and Biophotonics Saratov State University 83 Astrakhanskaya Str.Saratov 410012Russia Yuri Gagarin State Technical University of Saratov 77 Politechnicheskaya Str. Saratov 410054Russia Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precision Mechanics and Control of RAS 24 Rabochaya Str.Saratov 410028Russia Laboratory of Biophotonics Tomsk State University 36 Lenin's Ave.Tomsk 634050Russia

Malignant gliomas are highly invasive tumors that 1use the cerebral vessels for invasion due to high vascular fragility of the blood--brain barrier(BBB).On one hand,glioma is characterized by the BBB disruption,on the other hand,drug brain delivery via the BBB is a big challenge in glioma *** limited information about vascular changes associated with glioma growth is a reason of slow progress in prevention of glioma ***,we present in vrivo and er vrivo study of the BBB disruption and glioma cells(GCs)migration in rats using fuorescence and confocal *** uncovered a local breach in the BBB in the main tumor mass but not within the border of normal and malignant cells,where the BBB was impermeable for high weight *** migr ation of GCs were observed via the cerebral vessels with the intact BBB that was associated with macrophages *** mechanisms underlying glioma progression remain umknown but there is an evidence that the sympathetic nervous system(SNS)via activation of vascular beta2-adrenoreceptors(B2-ADRs)can play an important role in tumor *** results clearly show an increase in the expression of vascular B2-ADRs and production of the beta arrestin-1-co-factor of B2-ADRs signaling pathway in rats with *** blockade of B2-ADRs reduces the BBB disruption,macrophages infiltration,GCs migration and increases survival *** data suggest that the blockade of B2-ADRs may be a novel adjuvant therapeutic strategy to reduce glioma progression and prevent metastasis。

关键词： Glioma macrophages blood-brain barrier beta-2 adrenoreceptors bet a arrestin-1

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深共熔溶剂的生物催化应用

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分子催化 2015年第4期29卷 390-401页

作者：鲁超苏二正魏东芝 alexander M.Klibanov 南京林业大学轻工科学与工程学院江苏南京210037 华东理工大学生物反应器工程国家重点实验室上海200237 麻省理工学院化学系麻省剑桥02139

在绿色化学研究领域,溶剂占据着重要的位置.作为一个绿色溶剂必须满足廉价易得、可生物降解、无毒、可循环使用、无挥发性等标准的要求.但是至今能满足这些要求的溶剂仍然非常有限.近年来,深共熔溶剂(Deep Eutectic Solvents,DESs)被认... 详细信息

在绿色化学研究领域,溶剂占据着重要的位置.作为一个绿色溶剂必须满足廉价易得、可生物降解、无毒、可循环使用、无挥发性等标准的要求.但是至今能满足这些要求的溶剂仍然非常有限.近年来,深共熔溶剂(Deep Eutectic Solvents,DESs)被认为可以作为绿色溶剂替代传统的有机溶剂而受到广泛关注.DESs是由两个或多个成分在特定比例下形成的凝固点大大降低室温液态混合物.与离子液体相比,DESs具有廉价、低毒、可生物降解等特点,在许多领域成为研究热点.我们综述了DESs的生物降解性、毒性/细胞毒性及其作为生物催化反应介质的研究现状.基于对研究现状的认识,对DESs未来研究、应用需要解决的问题进行了讨论.作者期望对DESs生物催化应用研究现状的综述更进一步促进DESs研究、应用的发展.

关键词：绿色化学深共熔溶剂毒性生物催化

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Predicting the propensity for thermally activated β events in metallic glasses via interpretable machine learning

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npj Computational Materials 2020年第1期6卷 46-57页

作者： Qi Wang Jun Ding Longfei Zhang Evgeny Podryabinkin alexander Shapeev Evan Ma Department of Materials Science and Engineering Johns Hopkins UniversityBaltimoreMD 21218USA Center for Advancing Materials Performance from the Nanoscale(CAMP-Nano) State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Department of Computer Science Johns Hopkins UniversityBaltimoreMD 21218USA Center for Energy Science and Technology Skolkovo Institute of Science and Technology3 Nobel StreetMoscow 143026Russia

The elementary excitations in metallic glasses(MGs),i.e.,β processes that involve hopping between nearby sub-basins,underlie many unusual properties of the amorphous alloys.A high-efficacy prediction of the propensity for those activated processes from solely the atomic positions,however,has remained a daunting ***,employing well-designed site environment descriptors and machine learning(ML),notable progress has been made in predicting the propensity for stress-activated β processes(i.e.,shear transformations)from the static structure.

关键词： structure glasses metallic

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Construction of ground-state preserving sparse lattice models for predictive materials simulations

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npj Computational Materials 2017年第1期3卷 203-211页

作者： Wenxuan Huang alexander Urban Ziqin Rong Zhiwei Ding Chuan Luo Gerbrand Ceder Department of Material Science and Engineering Massachusetts Institute of TechnologyCambridgeMAUSA Department of Materials Science and Engineering UC BerkeleyBerkeleyCAUSA Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China Materials Science Division Lawrence Berkeley National LaboratoryBerkeleyCAUSA

First-principles based cluster expansion models are the dominant approach in ab initio thermodynamics of crystalline mixtures enabling the prediction of phase diagrams and novel ground ***,despite recent advances,the construction of accurate models still requires a careful and time-consuming manual parameter tuning process for ground-state preservation,since this property is not guaranteed by *** this paper,we present a systematic and mathematically sound method to obtain cluster expansion models that are guaranteed to preserve the ground states of their reference *** method builds on the recently introduced compressive sensing paradigm for cluster expansion and employs quadratic programming to impose constraints on the model *** robustness of our methodology is illustrated for two lithium transition metal oxides with relevance for Li-ion battery cathodes,i.e.,Li_(2x)Fe_(2(1−x))O_(2) and Li_(2x)Ti_(2(1−x))O_(2),for which the construction of cluster expansion models with compressive sensing alone has proven to be *** demonstrate that our method not only guarantees ground-state preservation on the set of reference structures used for the model construction,but also show that out-of-sample ground-state preservation up to relatively large supercell size is achievable through a rapidly converging iterative *** method provides a general tool for building robust,compressed and constrained physical models with predictive power.

关键词： cluster preserving thermodynamics

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Nested Metal Catalysts:Metal Atoms and Clusters Stabilized by Confinement with Accessibility on Supports

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Precision Chemistry 2023年第1期1卷 3-13页

作者： Bruce C.Gates alexander Katz Jingyue Liu Department of Chemical Engineering University of CaliforniaDavisDavisCalifornia 95616United States Department of Chemical and Biomolecular Engineering University of CaliforniaBerkeleyBerkeleyCalifornia 94720United States Department of Physics Arizona State UniversityTempeArizona 85287United States

Supported catalysts that are important in technology prominently include atomically dispersed metals and metal *** the metals are noble,they are typically unstablesusceptible to sinteringespecially under reducing *** the metals in supports such as organic polymers,metal oxides,and zeolites confers stability on the metals but at the cost of catalytic activity associated with the lack of accessibility of metal bonding sites to *** approach to stabilizing noble metal catalysts while maintaining their accessibility involves anchoring them in molecular-scale nests that are in or on *** nests include zeolite pore mouths,zeolite surface cups(half-cages),raft-like islands of oxophilic metals bonded to metal oxide supports,clusters of non-noble metals(e.g.,hosting noble metals as single-atom alloys),and nanoscale metal oxide islands that selectively bond to the catalytic metals,isolating them from the *** examples illustrate a trend toward precision in the synthesis of solid catalysts,and the latter two classes of nested catalysts offer realistic prospects for economical large-scale application.

关键词： catalyst synthesis supported metal catalysts encapsulated catalysts nested catalysts atomically dispersed metal catalysts

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把《资本论》拍成电影:效果与初衷大相径庭的历险

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艺术百家 2012年第4期28卷 89-93页

作者：康尔南京大学艺术学院江苏南京210093

本文对德国著名电影家亚历山大·克鲁格的新作《来自古典意识形态的消息,马克思—爱森斯坦—资本论》的成败得失进行了剖析,并以该片为例,就创作与接受、电影与故事、科学与艺术等理论问题展开了追问与深究。本文由"克鲁格"的资本论引... 详细信息

本文对德国著名电影家亚历山大·克鲁格的新作《来自古典意识形态的消息,马克思—爱森斯坦—资本论》的成败得失进行了剖析,并以该片为例,就创作与接受、电影与故事、科学与艺术等理论问题展开了追问与深究。本文由"克鲁格"的资本论引发出以下三个主要方面的哲学思考,一是有了创作自由,万事就大吉了吗?二是电影不讲故事,此路行得通吗?三是抽象的理论经典,可以拍成电影吗?总之,"克鲁格的《资本论》",充其量只能算作一部"试管电影"。其效果与初衷的大相径庭,应该是写在"实验报告"中的主题词。

关键词：电影艺术克鲁格《资本论》爱森斯坦创作与接受电影与故事科学与艺术

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Expedition to Mars North Pole and Creation There a Scientific Research Base

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Advances in Aerospace Science and Technology 2020年第1期5卷 20-43页

作者： alexander Rubinraut Design Office “Expplanet” Munich Germany

A project of the expedition to the north pole of Mars, which is carried out in two stages, has been developed. In the first stage, a space refueller and a mobile solar battery are delivered to the icy surface of the north pole of Mars. The delivery is carried out with the help of electric rocket er-7, driven by the electric rocket engine “MARS”, and the source of electricity is a solar battery from gallium arsenide. In the second stage, the space train is formed from two interconnected er-7 rockets and an orbital takeoff-landing capsule TLC-2, in which three astronauts land on the surface and carry out a complex of physical, biological and geological researches on Mars surface. The space refueller has been developed, which melts the water ice on the surface of Mars and with the help of an electrolyser and a liquefier produces fuel and oxidizer for the operation of the chemical rocket engine of the takeoff-landing capsule. To move astronauts from the north pole to the equator, a spacecraft—?marsoplane, which consists of the electric rocket er-7 and the takeoff-landing capsule TLC-1 is developed. The duration of the expedition is 110 days at a cost of 2 billion dollars.

关键词： Mars North Pole Electrical Rocket er-7 Takeoff-Landing Capsule TLC-1 and TLC-2 Space Refueller Marsoplane Superconducting Electrorocket Engine MARS

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