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Thermoluminescence characterization of natural and synthetic irradiated Ce-monazites

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Journal of Rare Earths 2024年第4期42卷 643-650页

作者： V.Correcher C.Boronat J.Garcia-Guinea J.f.Benavente T.Rivera-Montalvo CIEMAT Av.Complutense 4028040MadridSpain MNCN-CSIC J.Gutierrez Abascal 228006MadridSpain Instituto Politécnico Nacional CICATA-IPNAv.Legaria 694Mexico City11500Mexico

The thermoluminescence(TL)emission of synthetic and natural Ce-monazites was characterized here to determine the potential application in the identification of microscopic defects from a qualitative point of view trying to link each TL peak to a chemical-physical *** kinetic parameters that lead the luminescence processes were calculated by means of variable heating rate and computing glow curve deconvolution methods and allow identifying three groups of components at~90,130 and 290℃(for the mineral sample)and~90,170,220,270 and 320℃(for the synthetic CePO_(4):Nd_(0.20),La_(0.25)).The main differences appreciated in these complex TL curves are mainly due to(i)the content of impurities(natural sample contains lanthanides as well as U 0.60%and Th 5.22%)and(ii)the degree of crystallinity of the samples which is directly related to the type of impurities(synthetic monazite relies only on Nd and La).The behavior of the dose response in the range of 1-8 Gy is similar for both samples;the TL intensity increases linearly as the dose increases without changes in the position of the maxima,denoting first-order kinetic luminescence *** peak could be mostly associated with structural defects(i.e.,phase transitions),chemical reactions(i.e.,Ce3+?Ce4+redox reaction,dehydration or dehydroxylation processes)or intrinsic defects(i.e.,frenkel defects,ODCs or NBOHCs).

关键词： Thermoluminescence Kineticparameters Phosphate Ce-monazite Defects Rare earths

ANTIOXIDANTS CAffEIC ACID PHENETHYL ESTER (CAPE), EGCG AND RESVERATROL (RV) INDUCE CELL GROWTH ARREST AND CELL DEATH IN ARSENITE-TRANSfORMED HUMAN OSTEOBLAST-LIKE (HOS) CELLS

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ANTIOXIDANTS CAFFEIC ACID PHENETHYL ESTER (CAPE), EGCG AND R...

Hierarchy of Protein Loop-Lock Structures: A New Server for the Decomposition of a Protein Structure into a Set of Closed Loops

The Second International Symposium on Natural Antioxidants: Molecular Mechanisms and Health Effects

作者： C.Yang K.frenkel Environ. Med. NYU School of Medicine Environ. Med. NYU School of Medicine

Arsenic, a common environmental and occupational contaminant, is classified as a human carcinogen. The mechanism by which arsenic causes cancers in humans, however, is not completely elucidated yet. It is well known that chronic inflammation results in oOxidative stress and oxidative cell damage, which have been demonstrated to be involved in the process

关键词： HOS EGCG AND RESVERATROL CELLS ANTIOXIDANTS CAffEIC ACID PHENETHYL ESTER INDUCE CELL GROWTH ARREST AND CELL DEATH IN ARSENITE-TRANSfORMED HUMAN OSTEOBLAST-LIKE

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Computational Molecular Bioscience 2013年第1期3卷 1-8页

作者： Simon Kogan Zakharia frenkel Oleg Kupervasser Zeev Volkovich Department of Software Engineering ORT Braude College Karmiel Israel Genome Diversity Center Institute of Evolution University of Haifa Haifa Israel Transist Video Limited Liability Company Skolkovo Russia

HoPLLS (Hierarchy of protein loop-lock structures) (http://***/~skogan/Apache/mydata1/***) is a web server that identifies closed loops-a structural basis for protein domain hierarchy. The server is based on the loop-and-lock theory for structural organisation of natural proteins. We describe this web server, the algorithms for the decomposition of a 3D protein into loops and the results of scientific investigations into a structural “alphabet” of loops and locks.

关键词： Structural Alphabet Loop-Lock Structure Web Server Protein Amino Acids

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系统可靠性研究新进展

作者： (以)Anatoly Lisnianski (以)Ilia frenkel等

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人力资源管理强度对员工工作态度的影响研究

科技管理研究 2011年第19期31卷 147-150,161页

作者：李敏刘继红 Stephen J.frenkel 华南理工大学工商管理学院广东广州510640 新南威尔士大学商学院

着眼于人力资源管理的理论研究与管理实践不完全契合,认为人力资源管理应是一个整体,且人力资源管理信息有效传递和被员工有效感知是人力资源管理的关键。以两家劳动密集型企业364名员工为样本,探讨了人力资源管理强度对员工工作态度的... 详细信息

着眼于人力资源管理的理论研究与管理实践不完全契合,认为人力资源管理应是一个整体,且人力资源管理信息有效传递和被员工有效感知是人力资源管理的关键。以两家劳动密集型企业364名员工为样本,探讨了人力资源管理强度对员工工作态度的影响。结构方程模型分析结果表明:人力资源管理强度对工作满意度和组织认同感有显著正向影响;主管支持感在人力资源管理强度和员工工作态度之间起到部分中介作用。最后,针对研究结果进行了讨论。

关键词：人力资源管理强度主管支持感工作满意度组织认同感

X-射线吸收谱原位表征Cu-Zn/SiO_2催化剂Cu价态

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化学学报 2018年第8期76卷 639-643页

作者：贾臻龙涂云宝王建强 frenkel Anatoly I. 杨为民刘仲能许中强中国石油化工股份有限公司上海石油化工研究院上海201208 Yeshiva University Physics Department

铜基催化剂的价态组成与制备方法、还原温度有关,也是决定其催化性能的关键因素.本文对比研究Cu-Zn/SiO_2和Cu/SiO_2催化剂前驱体在不同还原温度下的价态组成及其醋酸甲酯加氢性能.采用同步辐射X射线吸收谱原位表征催化剂前驱体的Cu K边... 详细信息

铜基催化剂的价态组成与制备方法、还原温度有关,也是决定其催化性能的关键因素.本文对比研究Cu-Zn/SiO_2和Cu/SiO_2催化剂前驱体在不同还原温度下的价态组成及其醋酸甲酯加氢性能.采用同步辐射X射线吸收谱原位表征催化剂前驱体的Cu K边的X射线近边吸收谱(XANES),通过线性组合分析方法(LCf)拟合XANES吸收谱得到了催化剂前驱体在不同还原温度下氧化态(Cu^(2+)、Cu^+)和金属态(Cu0)的组分含量.结果表明:(1)采用蒸氨法添加Zn制备的Cu-Zn/SiO_2催化剂前驱体铜组分还原度高;(2)催化剂前驱体在还原过程中Cu^+主要存在于低温还原阶段(<250℃),且Cu^0+Cu^+含量较低(≤40%);(3)金属态铜是醋酸酯加氢反应的活性中心.

关键词： Cu/SiO2 Cu-Zn/SiO2 醋酸甲酯乙醇 XANES

New Sensor Composites Based on Aromatic Polyamide

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New Sensor Composites Based on Aromatic Polyamide

第十三届国际复合材料会议

作者： O.V.Sidorov A.M.Schetinin G.G.frenkel Department of Physics of Moscow State Textile University Moscow Russia 117918 Department of Physics of Moscow State Textile University Moscow Russia 117918 Department of Physics of Moscow State Textile University Moscow Russia 117918

＜正＞One of the most perspective trends in materials development is designing and constructing sensor materials based on rigid-chain polymers [1,2]. The creation of piezocomposite materials （PCM） in the form of high-strength elastic heat-resistant films enables one to create high-strength composite intellectual materials and constructions. The basis for this purpose is the film composite piezoelectric transducers （PET） of the first and second generations.

关键词： sensor composite piezoelectricity application

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改进中的网络操作系统

电子与电脑 1995年第1期2卷 102-104页

作者： GARRY frenkel

网络操作系统工业正在悄悄地发生一场重要变革。现在的急迫问题不再是怎样使一些PC机共享磁盘和打印机,而是要管理多个LAN组成的异种网络,这种网络由分布在世界各地的大量服务器和成千上万的用户组成。

关键词：局域网络网络操作系统网络服务器

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爱与数学