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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

基于中医传承计算平台分析王进东教授治疗失眠的用药规律

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中医临床研究 2024年第16期16卷 93-96页

作者：张国辉王进东王静诺曾宪峰北京中医药大学深圳医院(龙岗) 广东深圳518000

目的:总结王进东教授治疗失眠的用药规律,为临床用药和研究提供参考。方法:收集2017年1月-2021年12月王进东教授治疗失眠的病例处方,采用中医传承计算平台(v3.0)建立数据库,运用频数统计、关联规则等方法对高频药物、性味归经、组方规... 详细信息

目的:总结王进东教授治疗失眠的用药规律,为临床用药和研究提供参考。方法:收集2017年1月-2021年12月王进东教授治疗失眠的病例处方,采用中医传承计算平台(v3.0)建立数据库,运用频数统计、关联规则等方法对高频药物、性味归经、组方规律进行统计分析。结果:共纳入300首处方,涉及药物112味,其中寒、温、苦、辛、甘为高频性味,脾经、肝经为高频归经,药物功效以清热药和补虚药为主;“龙骨-牡蛎”“茯苓-白术”等为高频药物组合;通过聚类分析共提取出4个核心药物组合,且药物与病机契合。结论:运用中医传承计算平台对王进东教授治疗失眠的用药规律进行探索,结果能较客观地反映王进东教授治疗本病的学术思想及用药规律,对临床有一定的借鉴与参考价值。

关键词：失眠睡眠障碍中医传承计算平台用药规律经验

Mn微合金化对Ti-Al-Mo-Zr-Fe-B合金组织演变和力学性能的影响

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稀有金属材料与工程 2024年第6期53卷 1555-1565页

作者：何苗霞燕迟董月成常辉 Alexandrov Igor v 南京工业大学材料科学与工程学院新材料研究院江苏南京211816 乌法理工大学材料科学与金属物理系俄罗斯乌法450008

通过OM、EBSD和TEM等研究了Mn微合金化对新型近αTi-Al-Mo-Zr-Fe-B合金微观组织和力学性能的影响。结果表明:添加0.5%(质量分数)的Mn元素可以将合金的铸态微观组织从3.28μm细化到2.65μm,使其抗拉伸强度从882 MPa提高到966 MPa,但延伸... 详细信息

通过OM、EBSD和TEM等研究了Mn微合金化对新型近αTi-Al-Mo-Zr-Fe-B合金微观组织和力学性能的影响。结果表明:添加0.5%(质量分数)的Mn元素可以将合金的铸态微观组织从3.28μm细化到2.65μm,使其抗拉伸强度从882 MPa提高到966 MPa,但延伸率从7.8%下降到5.1%。锻造后的2种合金的晶粒尺寸趋于一致,微观组织趋于等轴化且Mn微合金化后的组织更加均匀。锻造后,Ti-Al-Mo-Zr-Fe-B合金的抗拉伸强度和延伸率增加到966 MPa和16.4%,而含有0.5%(质量分数)Mn元素的合金具有更高的抗拉伸强度,达到了1079 MPa,同时延伸率达到了15.8%。结论表明,强度的提高可以归因于Mn元素的固溶强化效应,同时Mn微合金化处理使合金中的Al元素富集于α相,有利于提高合金的强度和塑性。

关键词： Mn微合金化近α钛合金组织演变力学性能

CCD/EMCCD光电参数测试系统的设计与应用

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中国光学（中英文） 2024年第3期17卷 693-703页

作者：沈吉 vIACHESLAv v.Zabudsky 常维静那启跃简云飞 OLEG v.Rikhalsky OLEKSANDR G.Golenkov vOLODYMYR P.Reva 华东光电集成器件研究所江苏苏州215263 乌克兰科学院v.E.Lashkaryov半导体物理研究所乌克兰基辅01001 乌克兰科学院Bogomoletz生理学研究所乌克兰基辅01001

本文开发了一种用于测量CCD和EMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的C... 详细信息

本文开发了一种用于测量CCD和EMCCD(电子倍增CCD)芯片光电参数的测试系统。该测试系统通过自动模式或手动模式间的切换,测量器件的暗电流、读出放大器的响应度、电荷转移效率、电荷容量和其他参数。该测试系统可以针对不同规格和结构的CCD/EMCCD器件,实现CCD晶圆或封装好的成品的参数测试,实现576×288、640×512、768×576、1024×1024、1280×1024 CCD/EMCCD的测试和筛选。

关键词： CCD EMCCD 测试系统光电参数

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B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

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Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.vien Department of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic CP phases via the type-I seesaw *** quark mases,three quark mixing angles,and the CP phase in the quark sector take the central values whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achieved by the type-I seesaw *** inverted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inverted hierarchies,the effective neutrino masses,and the Dirac CP phase are also consistent with recently reported limits.

关键词： flavor symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

尿石素A介导p38/MAPK通路抑制破骨细胞活性

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中国组织工程研究 2024年第8期28卷 1149-1154页

作者：黄浩然凡一诺卫杨文祥江梦钰方汉军王海彬陈镇秋刘予豪周驰广州中医药大学第一附属医院广东省广州市510405 广州中医药大学第三附属医院广东省广州市510378

背景:过度活跃的破骨细胞可破坏骨稳态,并在骨质疏松、脆性骨折、骨关节炎等相关性骨骼疾病的病理机制中起重要作用。研究证实,鞣花酸和鞣花单宁有抑制破骨细胞分化的潜能,尿石素A作为其天然代谢产物,具有抗氧化、抗炎、抗增殖及抗癌作... 详细信息

背景:过度活跃的破骨细胞可破坏骨稳态,并在骨质疏松、脆性骨折、骨关节炎等相关性骨骼疾病的病理机制中起重要作用。研究证实,鞣花酸和鞣花单宁有抑制破骨细胞分化的潜能,尿石素A作为其天然代谢产物,具有抗氧化、抗炎、抗增殖及抗癌作用,但其对破骨细胞分化的影响及其潜在的分子机制尚不清楚。目的:探讨尿石素A对核因子κB受体活化因子配体诱导破骨细胞分化的影响及作用机制。方法:体外培养稳定生长的小鼠单核巨噬细胞白血病细胞(RAW264.7),使用细胞毒性MTS实验检测不同浓度尿石素A(0,0.1,0.5,1.5,2.5μmol/L)对RAW264.7细胞的毒性,筛选出安全作用浓度。再使用不同浓度的尿石素A干预核因子κB受体活化因子配体诱导的RAW264.7细胞体外分化过程,进行抗酒石酸酸性磷酸酶染色和肌动蛋白环及细胞核染色,观察尿石素A对破骨细胞形成和功能的影响。最后通过Western Blot及RT-qPCR实验,观察尿石素A干预后丝裂原活化蛋白激酶信号通路中上下游基因和蛋白的表达情况。结果与结论:①尿石素A呈浓度依赖性地抑制体外破骨细胞分化及肌动蛋白环形成,2.5μmol/L的抑制作用最强;②尿石素A可抑制与破骨形成及骨吸收相关的Nfatc1、Ctsk、Mmp9、Atp6v0d2基因的表达及Nfatc1、Ctsk蛋白的合成;③尿石素A可通过抑制p38蛋白的磷酸化,抑制丝裂原活化蛋白激酶信号通路传导,从而抑制破骨细胞的活性。

关键词：尿石素A 破骨细胞 MAPK p38 RANKL

In situ digital testing method for quality assessment of soft soil improvement with polyurethane

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journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1732-1748页

作者： X.F.Wang C.j.Wang W.v.Yue Z.j.Zhang Z.Q.Yue Department of Civil Engineering China University of Geosciences (Beijing)BeijingChina Department of Water Science and Engineering Zhengzhou UniversityZhengzhouChina Department of Geotechnical Engineering Tongji UniversityShanghaiChina Department of Civil Engineering The University of Hong KongChina

This study purposes an in situ testing method on quality assessment of soil *** drilling data includes the spatial distribution and in situ strength of untreated and treated soil along three different drillholes measured by on-site drilling monitoring *** factual drilling data can characterize the degree of soil improvement by penetration injection with permeable *** from on-site drilling monitoring shows that the linear zones represent constant drilling speeds shown in the plot of drill bit advancement *** drilling time,which indicates the spatial distributions of soil *** soil profile at the study site is composed of four layers,which includes fill,untreated silty clay,treated silty clay,and mucky *** results of soil profile are verified by the parallel site *** constant drilling speeds profile the coring-resistant strength of drilled *** comparing with the untreated silty clay,the constant drilling speeds of the treated silty clay have been decreased by 13.0-62.8%.Two drilling-speed-based indices of 61.2%and 65.6%are proposed to assess the decreased average drilling speed and the increased in situ strength of treated silty *** tests,*** compressive strength(UCS)test,have been performed with core sample to investigate and characterize in situ strength by comparing that with drilling *** show that the average predicted strengths of treated silty clay are 2.4-6.9 times higher than the average measured strength of untreated silty *** UCS-based indices of 374.5%and 344.2%verified the quality assessment(QA)results by this new in situ *** method provides a cost-effective tool for quality assessment of soil improvement by utilizing the digital drilling data.

关键词： Drilling process monitoring system Hydraulic rotary drilling process Constant drilling speed Soil improvement Quality assessment

Role of lysosomal trafficking regulator in autophagic lysosome reformation in neurons:a disease perspective

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Neural Regeneration Research 2024年第5期19卷 957-958页

作者： Prashant Sharma jenny Serra-vinardell Wendy j.Introne May Christine v.Malicdan NIH Undiagnosed Diseases Program Common FundOffice of the DirectorNational Institutes of HealthBethesdaMDUSA Human Biochemical Genetics Section Medical Genetics BranchNational Human Genome Research InstituteNational Institutes of HealthBethesdaMDUSA(Serra-Vinardell JIntrone)

Lysosomes are discrete organelles that act as recycling centers for extracellular and intracellular materials,playing a pivotal role in maintaining cellular *** acidic environment,maintained by numerous hydrolytic enzymes,facilitates substrate *** in lysosomal processes can lead to abnormal substrate degradation,significantly impacting cellular *** energy-demanding cells,such as post-mitotic neurons,are especially vulnerable to these changes,often resulting in neurological ***,a conserved catabolic process,requires extensive lysosomal *** plays a key role in removing unnecessary intracellular components,ensuring cellular homeostasis,and promoting cell survival during stress conditions such as starvation,infection,or cellular damage.

关键词： homeostasis lysosomal removing

Synchronized off-harmonic probe laser with highly variable pulse duration for laser-plasma interaction experiments

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High Power Laser Science and Engineering 2024年第1期12卷 99-107页

作者： j.Hornung Y.Zobus H.Lorenté C.Brabetz B.Zielbauer v.Bagnoud GSI Helmholtzzentrum für Schwerionenforschung GmbH DarmstadtGermany Institut d’Optique UniversitéParis-SaclayPalaiseauFrance Institut für Angewandte Physik Technische Universität DarmstadtDarmstadtGermany

This paper presents the development and experimental utilization of a synchronized off-harmonic laser system designed as a probe for ultra-intense laser±plasma interaction experiments. The system exhibits a novel seed-generation design,allowing for a variable pulse duration spanning over more than three orders of magnitude, from 3.45 picoseconds to 10 nanoseconds. This makes it suitable for various plasma diagnostics and visualization techniques. In a side-view configuration, the laser was employed for interferometry and streaked shadowgraphy of a laser-induced plasma while successfully suppressing the self-emission background of the laser±plasma interaction, resulting in a signal-to-self-emission ratio of 110 for this setup. These properties enable the probe to yield valuable insights into the plasma dynamics and interactions at the PHELIX facility and to be deployed at various laser facilities due to its easy-to-implement design.

关键词： interferometry laser-plasma interaction off-harmonic probe laser streaked shadowgraphy