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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 exh.b.ts 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

In situ TEM investigation of electron irradiation and aging-induced high-density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

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Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.Lv h.L.Ge Q.Q.Jin X.h.Shao Y.T.Zhou b.Zhang X.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce high-density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve the *** results show that the hardness of the Mg alloy after irradiation for 10 h and aging for 9 h at 250℃ is 1.64 GPa,which is approximately 64% higher than that of the samples before being *** is mainly attributed to γ'precipitates on the basal plane after irradiation and the high-density nanoscale β'precipitates on the prismatic plane after aging,which should be closely related to the irradiation-induced homogenous *** latter plays a key role in precipitation *** result paves a way to improve the mechanical properties of metallic materials by tailoring the precipitation through irradiation and aging.

关键词： Mg alloy Electron beam irradiation hardening Precipitates In-situ TEM

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恰玛古异硫氰酸酯的酶解制备及抗宫颈癌活性

天然产物研究与开发 2024年第6期36卷 1032-1044页

作者：解帼轩塔玛莎·库尔曼江王昊陈雲杰努尔阿米乃·麦麦提王小静李金玉新疆师范大学生命科学学院、新疆特殊环境物种保护与调控生物学实验室、新疆特殊环境物种多样性应用与调控重点实验室乌鲁木齐830017

优化了恰玛古异硫氰酸酯(brassica rapa ***,bRIe)的外源酶解制备工艺,分析、评价了酶解产物的化学成分和抗宫颈癌活性。采用外源黑芥子酶对恰玛古硫代葡萄糖苷进行降解,通过单因素和正交优化实验确定了酶解法的最佳制备工艺:酶量为20μ... 详细信息

优化了恰玛古异硫氰酸酯(brassica rapa ***,bRIe)的外源酶解制备工艺,分析、评价了酶解产物的化学成分和抗宫颈癌活性。采用外源黑芥子酶对恰玛古硫代葡萄糖苷进行降解,通过单因素和正交优化实验确定了酶解法的最佳制备工艺:酶量为20μL、酶解温度70℃、ph 6.5、酶解时间2 h、抗坏血酸浓度为0.01 mg/g,在此条件下,异硫氰酸酯的提取率为11.13%;GC-MS鉴定分析所得酶解产物的化学成分有7种,分别为3-氨基-2-恶唑烷酮、2-恶唑烷硫酮、3-丁烯基异硫氰酸酯、2-苯乙基异硫氰酸酯、异硫氰酸异丙酯、异硫氰酸-2-苯乙酯。采用MTT法检测bRIe对宫颈癌hela、Siha、U14细胞的增殖抑制活性,其中bRIe对hela细胞的抑制作用最强,72 h IC_(50)为97.48μg/mL;细胞划痕实验显示bRIe抑制了hela细胞的迁移,PI流式细胞染色显示bRIe将细胞周期阻滞在S期和G2/M期,hochst 33258、Annexin V-FITC和PI染色表明bRIe诱导了hela细胞凋亡。研究结果为开发利用恰玛古用于功能食品和抗宫颈癌药物提供了科学依据。

关键词：异硫氰酸酯恰玛古酶解抗肿瘤

Mitigating Urban heat Island Effects: A Review of Innovative Pavement Technologies and Integrated Solutions

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Structural Durability & health Monitoring 2024年第5期18卷 525-551页

作者： S.F.Ismael A.h.Alias N.A.haron b.b.Zaidan Abdulrahman M.Abdulghani Department of Civil Engineering Faculty of EngineeringUniversiti Putra MalaysiaSerdang43400Malaysia Central Region Heavy Civil DivisionGranite ConstructionWoodlandsTexas77381USA SP Jain School of Global Management LidcombeSydneyNSW2141Australia Department of Communication Technology and Network Faculty of Computer Science and Information TechnologyUniversiti Putra MalaysiaSerdang43400Malaysia

In this review paper,we present a thorough investigation into the role of pavement technologies in advancing urban *** analysis traverses the historical evolution of these technologies,meticulously evaluating their socio-economic and environmental impacts,with a particular emphasis on their role in mitigating the urban heat island *** evaluation of pavement types and variables inﬂuencing pavement performance to be used in the multi-criteria decision-making(MCDM)framework to choose the optimal pavement application are at the heart of our *** serves to assess a spectrum of pavement options,revealing insights into the most effective and sustainable *** highlighting both the existing challenges and potential innovative solutions within theﬁeld,this paper aims to offer a directional compass for future urban planning and infrastructural *** review not only synthesizes the current state of knowledge but also aims to chart a course for future exploration,emphasizing the critical need for innovative and environmentally sensitive pavement tech-nologies in the creation of resilient and sustainable urban environments.

关键词： Pavement sustainability urban heat island environmental impact of pavements innovative pavement solutions economic and social implications sustainable development in urban areas

Cr-induced fusion reactions to synthesize superheavy elements

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Nuclear Science and Techniques 2024年第5期35卷 122-130页

作者： S.Madhu h.C.Manjunatha N.Sowmya b.M.Rajesh L.Seenappa R.S.Susheela Department of Physics R V College of EngineeringBangalore 560074India Visvesvaraya Technological University BelagaviKarnataka 590018India Department of Physics Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Physics Government First Grade CollegeDevanahallyKarnataka 562110India Department of Physics Government First Grade CollegeMulbagalKarnataka 563131India Department of Physics Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 *** cross sections produced in this investigation using ^(54)Cr projectiles were compared with those obtained in prior *** estimated cross sections from this analysis are consistent with the findings of prior *** the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)Cr+^(243)Am,23.2 fb at 236 MeV for ^(54)Cr+^(247)Cm,95.6 fb at 240 MeV for ^(53)Cr+248bk,and 1.33 fb at 242 MeV for ^(53)Cr+***,these projected cross sections with excitation energy and beam energy will be useful in future Cr-induced fusion reaction investigations.

关键词： Fusion cross sections Compound nucleus formation probability Survival probability Evaporation residue cross sections

绵羊源A型多杀性巴氏杆菌的分离鉴定及致病性分析

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中国动物传染病学报 2024年

作者：王梦奇郭桂英曾纪锋林衍荣张阿莉冯伟王雪倩杨诺范丽霞李雪松郑继平海南大学化学化工学院海南大学热带农林学院海南大学生命健康学院海南大学onehealth协同创新中心

为探究海南省某绵羊种羊养殖场内绵羊突发高热、咳嗽、食欲不佳和死亡的病因。本研究采集了死亡绵羊的肺脏、肝脏等脏器进行了细菌的分离鉴定、形态学观察、生化试验、16S rRNA鉴定分析、菌株荚膜血清型鉴定、多位点序列分型、抗生素敏... 详细信息

为探究海南省某绵羊种羊养殖场内绵羊突发高热、咳嗽、食欲不佳和死亡的病因。本研究采集了死亡绵羊的肺脏、肝脏等脏器进行了细菌的分离鉴定、形态学观察、生化试验、16S rRNA鉴定分析、菌株荚膜血清型鉴定、多位点序列分型、抗生素敏感性试验、毒力基因的检测、小鼠致病性试验等试验。结果显示：从病死绵羊的肺脏中分离到3株A型多杀性巴氏杆菌；所有菌株均属于ST432，与1株匈牙利多杀性巴氏杆菌分离株同源性最高；所有菌株均对林可霉素耐药，均对头孢噻肟、呋喃妥因、多粘菌素b等敏感；分离株均至少携带8个毒力基因；攻毒组小鼠在36h内全部死亡，且死亡小鼠肺脏病理变化明显。本研究表明导致该绵羊养殖场绵羊死亡的病原菌为A型多杀性巴氏杆菌，并且具有较强的致病性。本研究为海南省绵羊巴氏杆菌病的防治提供科学参考。

关键词：绵羊 A型多杀性巴氏杆菌分离鉴定耐药性致病性

Efficient guiding and focusing of intense laser pulse using periodic thin slits

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Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.huang K.Jiang C.N.Wu h.Peng P.C.hen R.Li h.b.Zhuo C.T.Zhou Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-plasma interactions as plasma optical components for generating high-harmonic light and controlling laser-driven particle ***,we propose and demonstrate that periodic thin slits can be regarded as a new breed of optical elements for efficient focusing and guiding of intense laser *** fundamental physics of intense laser interaction with thin slits is studied,and it is revealed that relativistic effects can lead to enhanced laser focusing far beyond the pure diffractive focusing *** addition,the interaction of an intense laser pulse with periodic thin slits makes it feasible to achieve multifold enhancement in both laser intensity and energy transfer efficiency compared with conventional *** results provide a novel method for manipulating ultra-intense laser pulses and should be of interest for many laser-based applications.

关键词： laser pulse intense

Spatiotemporal dynamics in butterfly h.b.id zones

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Insect Science 2024年第2期31卷 328-353页

作者： Ananda R.Pereira Martins Natalie b.Warren W.Owen McMillan Rowan D.h.b.rrett Redpath Museum McGill University859 Sherbrooke Street WestMontrealQuebecCanada Smithsonian Tropical ResearchInstitute GamboaPanama CityPanama

Evaluating whether h.b.id zones are stable or mobile can provide novelinsights for evolution and conservation biology. butterflies exh.b.t high sensitivity to envi-ronmental changes and represent an important model system for the study of h.b.id zoneorigins and maintenance. here, we review the literature exploring butterfly h.b.id zones,with a special focus on their spatiotemporal dynamics and the potential mechanisms thatcould lead to their movement or stability. We then compare different lines of evidenceused to investigate h.b.id zone dynamics and discuss the strengths and weaknesses ofeach approach. Our goal with this review is to reveal general conditions associated withthe stability or mobility of butterfly h.b.id zones by synthesizing evidence obtained us-ing different types of data sampled across multiple regions and spatial scales. Finally, wediscuss spatiotemporal dynamics in the context of a speciation/divergence continuum, therelevance of h.b.id zones for conservation biology, and recommend key topics for futureinvestigation.

关键词： butterflies human impacts h.b.id zones movement spatiotemporaldynamics stability

石榴花多糖通过抑制MyD88/NF-κb通路减轻脂多糖诱导小鼠RAW 264.7细胞炎症反应

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山东化工 2024年第13期53卷 31-34,38页

作者：张晓辉阿布都沙拉木·莫明黄鹏刘丹丹赛福丁·阿不拉阿得力江·吾斯曼新疆农业大学动物医学学院新疆乌鲁木齐830052

目的:通过脂多糖(Lipopolysaccharide,LPS)诱导小鼠RAW 264.7巨噬细胞炎症模型,探讨了石榴花多糖对细胞的抗炎效果及机制。方法:通过CCK8法检测不同浓度的石榴花多糖对小鼠RAW 264.7细胞活性的影响。LPS刺激建立细胞炎症模型,加入250,12... 详细信息

目的:通过脂多糖(Lipopolysaccharide,LPS)诱导小鼠RAW 264.7巨噬细胞炎症模型,探讨了石榴花多糖对细胞的抗炎效果及机制。方法:通过CCK8法检测不同浓度的石榴花多糖对小鼠RAW 264.7细胞活性的影响。LPS刺激建立细胞炎症模型,加入250,125,31.25μg/mL石榴花多糖进行处理,24 h后Griess法检测细胞上清液NO水平,ELISA法检测细胞上清液TNF-α、IL-1β、IL-6、PGE_(2)水平,RT-qPCR法检测细胞iNOS、COX2、MyD88、NF-κb mRNA表达。结果:石榴花多糖的质量浓度在0.25 mg/mL时,细胞存活率下降,在0.125 mg/mL以下时RAW 264.7细胞活力上升。与模型组相比,石榴花多糖组细胞上清液NO、TNF-α、IL-1β、IL-6、PGE_(2)水平均降低,RAW 264.7细胞的iNOS、COX2、MyD88、NF-κb mRNA表达降低(Pb信号通路,降低NO释放和炎症因子水平,进而减轻LPS诱导的小鼠巨噬细胞炎症反应。

关键词：石榴花多糖炎症 RAW 264.7细胞 MyD88/NF-κb信号通路

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