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Geochemistry and mineralogy of beach sediments in the northern Gulf of Mexico,Tamaulipas state,Mexico:implication for provenance

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Journal of Palaeogeography 2024年第3期13卷 375-400页

作者： Mayank Shukla sanjeet K.Verma Mayla A.Ramos-Vázquez John S.Armstrong-Altrin Karla R.hernández-Martínez Sumit Mishra Vivek P.Malviya héctor hernández-Mendoza Posgrado de la Division de Geociencias Aplicadas Instituto Potosino de Investigacion Científica y Tecnologica(IPICYT)Camino a la Presa San José2055San Luis Potosí78216Mexico Division de Geociencias Aplicadas Instituto Potosino de Investigación Científica y Tecnologica(IPICYT)Camino a la Presa San Jose 2055San Luis Potosí78216Mexico Universidad Nacional Autonoma de México Instituto de Ciencias del Mar y LimnologíaUnidad de ProcesosOceanicos y CosterosCiudad UniversitariaCiudad de México 04510Mexico Department of Marine Sciences Bharathidasan UniversityTiruchirappalli620024Tamil NaduIndia Instituto de Geociencias Universidad Nacional Autonoma de MéxicoBoulevard Juriquilla 300176230JuriquillaQueretaroMexico Department of Applied Geology Dr.Harisingh Gour Central UniversitySagar470002Madhya PradeshIndia Instituto de Investigacion de Zonas Desérticas Universidad Autònoma de San Luis PotosíAltair 200CP 78377San LuisS.L.P.Mexico Universidad del Centro de Mexico Capitán Caldera 75CP 78250San LuisS.L.P.Mexico

Geochemical and mineralogical studies were performed in the La Pesca(LP)and Tesoro Altamira(TA)beach sediments,located in the Tamaulipas state,northern Gulf of *** main aim of this study is to infer the weathering history and provenance and to discriminate the tectonic environment of the beach *** sediments are composed of quartz with small amounts of accessory minerals such as plagioclase,calcite,orthoclase,microcline,and *** beach sediments are classified as fine-grained and very well sorted,however LP has coarse skewed and leptokurtic sediments,whereas TA has fine-skewed and very leptokurtic *** chemical index of weathering(CIW’)indicates intense weathering in the source *** quartz grain microtextures in the LP and TA are classified into mechanical,chemical,and mechanical/chemical *** features such as fractures,pits,percussion marks,abrasion fatigue,and V-shaped marks favor high-energy littoral,fluvial,subaqueous-marine,and aeolian *** chemical features indicate solution pits and crystalline overgrowth,which suggests a silica saturated marine *** mechanical/chemical features display adhering particles and elongated depressions suggest formation in a sub-aqueous nearshore marine *** and trace elements-based provenance discrimination diagrams indicate a felsic source derived from the Mesa Central(MC),Sierra Madre Oriental(SMOr)and Oaxaquia *** major and trace element concentrations imply a passive margin setting for the northern Gulf of Mexico,which is consistent with the general geology.

关键词： Beach sediments Geochemistry Mineralogy Provenance Tamaulipas Tectonic setting

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增材制造Ti6Al4V合金的闪速等离子体电解氧化与在生理介质中的电化学行为

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Transactions of Nonferrous Metals Society of China 2024年第4期34卷 1150-1166页

作者： h.MORA-sanChEZ C.RAMOS M.MOhEDANO B.TORRES R.ARRABAL E.MATYKINA Departamento de Ingeniería Química y de Materiales Facultad de Ciencias QuímicasUniversidad Complutense de Madrid28040 MadridSpain CIDETEC Basque Research and Technology Alliance(BRTA)Po.Miramón 19620014 Donostia-San SebastiánSpain Departamento Matemática Aplicada Ciencia e Ingeniería de Materiales y Tecnología ElectrónicaUniversidad Rey Juan CarlosC/Tulipán s/nMóstoles 28933MadridSpain

研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(PEO)处理及其电化学行为。通过短时间(<120 s)PEO处理(也称闪速PEO),在AM合金和传统合金表面制备了3~10μm厚、含Ca和P的涂层。然后在改... 详细信息

研究激光粉末床熔融增材制造(AM)(又称直接金属激光烧结)技术制备的Ti6Al4V合金等离子体电解氧化(PEO)处理及其电化学行为。通过短时间(<120 s)PEO处理(也称闪速PEO),在AM合金和传统合金表面制备了3~10μm厚、含Ca和P的涂层。然后在改良的α-MEM溶液中,通过动电位极化曲线和电化学阻抗谱(EIS)评估了合金的电化学行为。与传统合金相比,AM合金中形成了细小的层片状α显微组织和层间小尺寸的β相颗粒,这促使了火花的产生,从而促进了PEO涂层的生长。闪速PEO涂层提高了传统合金和AM合金的耐腐蚀性,最薄的涂层(<3μm)提供了高达3倍的保护。AM Ti6Al4V由于其高的晶界密度,易受局部缝隙腐蚀的影响。而即使短至35 s的闪速PEO处理也足以成功避免这种情况。

关键词：增材制造激光粉末床熔融等离子体电解氧化闪速PEO 钛缝隙腐蚀 α-MEM

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A facile strategy for tuning the density of surface-grafted biomolecules for melt extrusion-based additive manufacturing applications

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Bio-Design and Manufacturing 2024年第3期7卷 277-291页

作者： I.A.O.Beeren G.Dos santos P.J.Dijkstra C.Mota J.Bauer h.Ferreira Rui L.Reis N.Neves S.Camarero-Espinosa M.B.Baker L.Moroni Department of Complex Tissue Regeneration MERLN Institute for Technology-Inspired Regenerative MedicineMaastricht University6229 ER MaastrichtThe Netherlands 3B’s Research Group I3Bs–Research Institute on BiomaterialsBiodegradables and BiomimeticsHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative MedicineUniversity of MinhoAveParkZona Industrial da Gandra4805-017 BarcoGuimarãesPortugal ICVS/3B’s-PT Government Associate Laboratory 4806-909 Braga/GuimarãesPortugal POLYMAT University of the Basque Country UPV/EHU20018 Donostia/San SebastiánSpain IKERBASQUE Basque Foundation for Science48009 BilbaoSpain

Melt extrusion-based additive manufacturing(ME-AM)is a promising technique to fabricate porous scaffolds for tissue engi-neering ***,most synthetic semicrystalline polymers do not possess the intrinsic biological activity required to control cell *** of biomolecules on polymeric surfaces of AM scaffolds enhances the bioactivity of a construct;however,there are limited strategies available to control the surface ***,we report a strategy to tune the surface density of bioactive groups by blending a low molecular weight poly(ε-caprolactone)5k(PCL5k)containing orthogonally reactive azide groups with an unfunctionalized high molecular weight PCL75k at different *** porous three-dimensional(3D)scaf-folds were then fabricated using a high weight percentage(75 wt.%)of the low molecular weight PCL *** a proof-of-concept test,we prepared films of three different mass ratios of low and high molecular weight polymers with a thermopress and reacted with an alkynated fluorescent model compound on the surface,yielding a density of 201-561 pmol/cm^(2).Subsequently,a bone morphogenetic protein 2(BMP-2)-derived peptide was grafted onto the films comprising different blend compositions,and the effect of peptide surface density on the osteogenic differentiation of human mesenchymal stromal cells(hMSCs)was *** two weeks of culturing in a basic medium,cells expressed higher levels of BMP receptor II(BMPRII)on films with the conjugated *** addition,we found that alkaline phosphatase activity was only significantly enhanced on films contain-ing the highest peptide density(i.e.,561 pmol/cm^(2)),indicating the importance of the surface *** together,these results emphasize that the density of surface peptides on cell differentiation must be considered at the cell-material ***,we have presented a viable strategy for ME-AM community that desires to tune the bulk and surface functionality via blending of(m

关键词： Additive manufacturing Blending Surface functionalization Surface density Click chemistry human

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淫羊藿苷对抑郁症模型小胶质细胞表型转化的调控作用

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天然产物研究与开发 2024年第2期36卷 187-195页

作者：曹利华高松王笑雨王真真贺红娟李娜白明苗明三河南中医药大学中医药科学院郑州450046 仲景宛西制药股份有限公司河南省中药固体制剂技术创新中心西峡474550 河南中医药大学药学院郑州450046

探索淫羊藿苷抗抑郁的作用机制,将SPF级KM小鼠分为空白组、模型组、盐酸氟西汀组(10 mg/kg)、淫羊藿苷高(50 mg/kg)、低(25 mg/kg)剂量组。除空白组外,其余各组小鼠采用56 d慢性不可预知温和应激建立抑郁症模型。造模第1 d开始灌胃给予... 详细信息

探索淫羊藿苷抗抑郁的作用机制,将SPF级KM小鼠分为空白组、模型组、盐酸氟西汀组(10 mg/kg)、淫羊藿苷高(50 mg/kg)、低(25 mg/kg)剂量组。除空白组外,其余各组小鼠采用56 d慢性不可预知温和应激建立抑郁症模型。造模第1 d开始灌胃给予各组小鼠相应药物,连续56 d。于给药后第53~56 d,进行行为学测试。末次给药后,取材。酶联免疫吸附剂实验(enzyme linked immunosorbent assay,ELISA)检测脑组织匀浆白细胞介素6(interleukin-6,IL-6)、白细胞介素10(interleukin-10,IL-10)、五羟色胺(5-hydroxytryptamine,5-hT)、多巴胺(dopamine,DA)、去甲肾上腺素(norepinephrine,NE)水平;实时荧光定量PCR(quantitative real-time PCR,RT-PCR)检测脑组织中IL-6、IL-10、诱导性一氧化氮合酶(inducible nitric oxide synthase,iNOS)、分化簇206(cluster of differentiation 206,CD206)mRNA表达;蛋白免疫印迹(Western blot)检测脑组织iNOS、CD206蛋白表达。体外培养小鼠小胶质细胞(BV-2),采用细胞增殖与毒性检测试剂盒(Cell Counting Kit-8,CCK-8)法检测淫羊藿苷的细胞毒性。BV-2细胞暴露于100μg/mL脂多糖及15μg/mL、25μg/mL的淫羊藿苷24 h后,收集细胞。免疫荧光技术检测细胞iNOS、CD206蛋白表达。研究结果表明,慢性不可预知温和应激致抑郁症模型制备成功,淫羊藿苷可降低抑郁症小鼠脑组织IL-6水平及IL-6、iNOS mRNA表达,升高脑组织IL-10、5-hT、DA、NE水平及IL-10、CD206 mRNA表达;降低脑组织iNOS蛋白,升高CD206蛋白表达;改善模型小鼠抑郁症样行为。淫羊藿苷可降低LPS刺激的BV-2细胞iNOS蛋白表达,升高CD206蛋白表达。结果表明,淫羊藿苷抑制小胶质细胞M1表型转化,促进M2表型转化,从而改善模型小鼠抑郁样行为。

关键词：淫羊藿苷抑郁症小胶质细胞表型转化细胞炎症模型

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A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

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Journal of Advanced Ceramics 2022年第2期11卷 263-272页

作者： Jun LI Yang hONG san hE Weike LI han BAI Yuanhua XIA Guangai SUN Zhongxiang ZhOU School of Physics Harbin Institute of TechnologyHarbin 150001China heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory for Neutron Physics of CAEP Institute of Nuclear Physics and ChemistryMianyang 621999China

The barium ferrite BaTi_(x)Fe_(12−x)O_(19)(x=0.2,0.4,0.6,0.8)(BFTO-x)ceramics doped by Ti4+were synthesized by a modified sol–gel *** crystal structure and magnetic structure of the samples were determined by neutron diffraction,and confirm that the BFTO-x ceramics were high quality single phase with sheet *** x increasing from 0.2 to 0.8,the saturation magnetization(M_(s))decreases gradually but the change trend of coercivity(h_(c))is complex under the synergy of the changed grain size and the magnetic crystal anisotropy *** on the high valence of Ti^(4+),double resonance peaks are obtained in the curves of the imaginary part of magnetic conductivity(μ′′)and the resonance peaks could move toward the low frequency with the increase of x,which facilitate the samples perform an excellent wideband modulation microwave absorption *** the x=0.2 sample,the maximum reflection loss(RL)can reach−44.9 dB at the thickness of only 1.8 mm,and the bandwidth could reach 5.28 Ghz at 2 mm when RL is less than−10 *** the BFTO-x ceramics show excellent frequency modulation ability varying from 18(x=0.8)to 4 Ghz(x=0.4),which covers 81%of the investigated frequency in microwave absorption *** work not only implements the tunable of electromagnetic parameters but also broadens the application of high-performance microwave absorption devices.

关键词： barium ferrite neutron diffraction microwave absorption

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A critical review of key materials and issues in solid oxide cells

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Interdisciplinary Materials 2023年第1期2卷 111-136页

作者： Shuai he Yuanfeng Zou Kongfa Chen san P.Jiang high-temperature hydrogen Production Laboratory Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshanChina Department of Materials Science and Engineering Fuzhou UniversityFuzhouFujianChina WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWestern AustraliaAustralia

Solid oxide cells(SOCs)are all solid ceramic devices with the dual functionality of solid oxide fuel cells(SOFCs)to convert the chemical energy of fuels like h2,natural gas and other hydrocarbons to electricity and of solid oxide electrolysis cells(SOECs)to store renewable electric energy of sun and wind in hydrogen *** the electrochemical energy conversion and storage devices,SOCs are the most clean and efficient technology with unique dual *** to the high operation temperature(typically 600–800°C),SOCs exhibit many advantages over other energy conversion devices,such as low material cost,high efficiency and fuel *** has been rapid development of SOC technologies over the last decade with significant advantages and progress in key materials and a fundamental understanding of key issues such as an electrode,electrolyte,performance degradation,poisoning,and stack *** reversible polarization also has a critical effect on the surface segregation and stability of the electrode and electrode/electrolyte *** critical review starts with a brief introduction,working principles and thermodynamics of SOC technology to readers with interests in this rapidly developing and emerging *** the key materials currently used in SOCs are summarized,followed by the discussion of the most advanced electrode modification methods and critical issues of SOCs,including the surface chemistry,segregation,electrode/electrolyte interface and varying material degradation mechanisms under reversible *** challenges and prospects of SOC technology for future developments are discussed.

关键词： critical review key materials and interface operating principles prospects and challenges solid oxide cells

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Polarization conversion using customized subwavelength laser-induced periodic surface structures on stainless steel

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Photonics Research 2022年第9期10卷 2024-2031页

作者： MAhMOUD h.ELShORBAGY LUIS MIGUEL SÁNChEZ-BREA JERÓNIMO BUENCUERPO JESÚS DEL hOYO ÁNGELA SORIA-GARCÍA VERÓNICA PASTOR-VILLARRUBIA ALEJANDRO san-BLAS AINARA RODRÍGUEZ sanTIAGO MIGUEL OLAIZOLA JAVIER ALDA Grupo Complutense deÓptica Aplicada Departamento deÓpticaFacultad de Ciencias FıÂsicasUniversidad Complutense de MadridPlaza de las Ciencias S.N.28040 MadridSpain Physics Department Faculty of ScienceMinia University61519 El-MinyaEgypt L’Institut Photovoltaïque d’Île-de-France(IPVF) 18 Bd Thomas Gobert91120 PalaiseauFrance Ceit-Basque Research and Technology Alliance(BRTA) Manuel Lardizabal 1520018 Donostia/San SebastiánSpain Universidad de Navarra TecnunManuel Lardizabal 1320018 Donostia/San SebastiánSpain

Stainless steel is a basic raw material used in many *** can be customized by generating laser-induced periodic surface structure(LIPSS)as subwavelength ***,we present the capabilities of an LIPSS on stainless steel to modify the polarization state of the reflected radiation at the IR *** structures have been modeled using the finite element method and fabricated by femtosecond laser *** Stokes parameters have been obtained experimentally and a model for the shape has been used to fit the simulated Stokes values to the experimental *** birefringence of the LIPSS is analyzed to explain how they modify the polarization state of the incoming *** find the geometry of the subwavelength grating that makes it work as an optical retarder that transforms a linearly polarized light into a circularly polarized *** addition,the geometrical parameters of the LIPSS are tuned to selectively absorb one of the components of the incoming light,becoming a linear axial *** selecting the geometrical parameters and orientation of the fabricated LIPSS makes it possible to obtain an arbitrary pure polarization state when illuminated by a pure linearly polarized state oriented at an azimuth of 45°.The overall reflectance of these transformations reaches values close to 60%with respect to the incident intensity,which is the same reflectivity obtained for non-nanostructured stainless steel flat surfaces.

关键词： steel laser polarization

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硫化氢保护衣霉素诱导的人心脏成纤维细胞应激损伤

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湖北医药学院学报 2024年第3期43卷 242-246,F0002,F0003页

作者：张蕾武文艺吴三五李冬张友恩湖北医药学院附属人民医院临床医学研究所湖北十堰442000 湖北医药学院附属人民医院动脉粥样硬化性心血管疾病(ASCVD)临床医学研究中心湖北十堰442000 湖北医药学院附属人民医院动脉粥样硬化疾病研究十堰市重点实验室湖北十堰442000 湖北医药学院附属人民医院心血管内科湖北十堰442000

目的:观察硫化氢(hydrogen sulfide,h2S)对内质网应激细胞损伤的保护作用,并探讨Caspase 3/Bax/Bcl-2信号通路机制。方法:人心脏成纤维细胞(human cardiac fibroblasts,hCF)随机分为对照组(Control)、硫氢化钠组(NahS)、衣霉素组(Tunicamycin)、NahS+Tunicamycin组。DhE染色检测ROS水平;JC-1检测线粒体膜电位;LysoTracker Deep Red检测溶酶体活性;Western blot分析检测Caspase 3、Bax和Bcl-2的表达;Annexin V凋亡检测试剂盒检测细胞凋亡。结果:与Control组比较,Tunicamycin组ROS水平、溶酶体活性、细胞凋亡均升高,线粒体膜电位降低,Caspase 3、Bax表达增强,Bcl-2表达减弱。与Tunicamycin组比较,NahS干预可以降低细胞ROS生成、溶酶体活性、细胞凋亡,抑制膜电位丢失,Caspase 3、Bax表达减弱,Bcl-2表达增强。结论:h2S对衣霉素诱导的细胞损伤具有保护作用,其作用机制与保护线粒体功能,抑制Caspase 3/Bax/Bcl-2凋亡信号通路有关。

关键词：硫化氢内质网应激线粒体 Caspase 3/Bax/Bcl-2 细胞凋亡

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基于气相-离子迁移谱分析结合感官分析鉴定不同品种小麦粉风味差异

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食品科技 2024年第1期49卷 129-137页

作者：强婉丽黄序郭子璇王鑫宇张连慧李沿伞惟琳营养健康与食品安全北京市重点实验室老年营养食品研究北京市工程实验室中粮营养健康研究院有限公司北京102209 中粮粮谷控股有限公司北京100020

为研究不同品种小麦粉的风味差异,对5个不同品种的小麦粉采用顶空萃取其挥发性物质并进行气相-离子迁移谱分析鉴定。结果表明:小麦粉中挥发性有机物共有48种,其中醇类16种、醛类9种、酮类7种、酯类11种、柠檬烯2种、二丙烯基硫化物1种... 详细信息

为研究不同品种小麦粉的风味差异,对5个不同品种的小麦粉采用顶空萃取其挥发性物质并进行气相-离子迁移谱分析鉴定。结果表明:小麦粉中挥发性有机物共有48种,其中醇类16种、醛类9种、酮类7种、酯类11种、柠檬烯2种、二丙烯基硫化物1种、酸类1种、呋喃类1种。不同品种小麦粉的挥发性有机物种类和浓度存在差异,XC样品中大部分挥发性物质含量略高于YL21,XM26和FDC大部分挥发性物质含量明显高于YL21,而SDXP与YL21相差不大。XC主要物质有:乙醇、2-丁酮、丁醇、环己烯-2-酮和二烯丙基硫化物等;SDXP主要物质有:丁酸乙酯、柠檬烯和己酸乙酯等;XM26主要物质有:甲基庚烯酮、壬醛、E-2-庚醛、反式-2-丁烯酸乙酯和2-甲基-3-呋喃硫醇等;FDC主要物质有:戊醛、丙酸乙酯、乙酸乙酯、丁醛、2-戊基呋喃和2-乙基-1-己醇等。通过感官定量描述性评分分析,发现不同品种小麦粉感官属性存在一定差异。根据相关性分析,挖掘并识别出小麦粉不同感官属性所代表的关键挥发性物质,初步建立关键物质含量与感官的相关性。

关键词：风味小麦粉感官分析气相-离子迁移谱挥发性物质

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RAFT: Synthesis of Polymers with Controlled Architectures for Specific Applications

RAFT: Synthesis of Polymers with Controlled Architectures fo...

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中国化学会第29届学术年会

作者： Graeme Moad Ezio Rizzardo san.h.thang CSIRO Materials Science and Engineering

This talk will focus on the development and practical aspects of free radical polymerization with reversible addition-fragmentation chain transfer – the RAFT process. The RAFT process developed at our CSIRO laboratories is conducted simply by the addition of a RAFT agent, a thiocarbonylthio compound of general structure（ZC（=S）SR） to a conventional radical polymerization. Suitable RAFT agents include dithioesters, trithiocarbonates, xanthates, dithiocarbamates and our latest switchable N-alkyl-N-pyridyldithiocarbamates. These thiocarbonylthio compounds confer living characteristics to the radical polymerization by a mechanism of reversible addition-fragmentation chain transfer and provide exceptional control over molecular weight, molecular weight distribution, composition and architecture of the resulting polymers. The process can be applied to most monomers polymerizable by radical polymerization and offers a convenient route to well-defined homo-, gradient, diblock, triblock and star polymers as well as more complex architectures including microgels and polymer brushes. Applications of RAFT polymers ranging from surfactants, dispersants, coatings and adhesives, to biomaterials, diagnostics, drug delivery, and optoelectronics are being explored extensively by many academics and industrial researchers the world over.

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