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Single atom Cu-N-C catalysts for the electro-reduction of CO_(2) to CO assessed by rotating ring-disc electrode

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journal of Energy Chemistry 2024年第1期88卷 169-182,I0004页

作者： S.Pérez-Rodríguez m.Gutiérrez-Roa C.Giménez-Rubio D.Ríos-ruiz P.Arévalo-Cid m.V.martínez-Huerta A.Zitolo m.j.Lázaro D.Sebastián Instituto de Carboquímica(CSIC) Miguel Luesma Castán 450018 ZaragozaSpain Instituto de Catálisis y Petroleoquímica(CSIC) Marie Curie 228049 MadridSpain Synchrotron SOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochemical CO_(2) reduction reaction(CO_(2)RR) to controllable chemicals is considered as a promising pathway to store intermittent renewable energy. Herein, a set of catalysts based on copper-nitrogendoped carbon xerogel(Cu-N-C) are successfully developed varying the copper amount and the nature of the copper precursor, for the efficient CO_(2)RR. The electrocatalytic performance of Cu-N-C materials is assessed by a rotating ring-disc electrode(RRDE), technique still rarely explored for CO_(2)RR. For comparison, products are also characterized by online gas chromatography in a H-cell. The as-synthesized Cu-NC catalysts are found to be active and highly CO selective at low overpotentials(from -0.6 to -0.8 V ***) in 0.1 m KHCO_(3), while H_(2) from the competitive water reduction appears at larger overpotentials(-0.9 V vs. RHE). The optimum copper acetate-derived catalyst containing Cu-N_(4) moieties exhibits a CO_(2)-to-CO turnover frequency of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/CO ratio of 1.8. These results demonstrate that RRDE configuration can be used as a feasible approach for identifying electrolysis products from CO_(2)RR.

关键词： Cu-N-C Carbon xerogel Rotating ring disc electrode Carbon dioxide reduction reaction Carbon monoxide

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A multi-shot target wheel assembly for high-repetition-rate, laser-driven proton acceleration

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High Power Laser Science and Engineering 2024年第2期 91-98页

作者： j.Pe?as A.Bembibre D.Cortina-Gil L.martín A.Reija C.ruiz m.Seimetz A.Alejo j.Benlliure Instituto Galego de Física de Altas Enerxías Universidade de Santiago de Compostela Laboratorio Láser de Aceleración y Aplicaciones RIAIDT Universidade de Santiago de Compostela Instituto Universitario de Física Fundamental y matemáticas y Dpto.de Didáctica de la matemática y de las Ciencias Experimentales Universidad de Salamanca Instituto de Instrumentación para Imagen molecular (I3m) CSIC-Universitat Politècnica de València

A multi-shot target assembly and automatic alignment procedure for laser–plasma proton acceleration at high repetition rate are introduced. The assembly is based on a multi-target rotating wheel capable of hosting more than 5000 targets,mounted on a 3D motorized stage to allow rapid replenishment and alignment of the target material between laser irradiations. The automatic alignment procedure consists of a detailed mapping of the impact positions at the target surface prior to the irradiation that ensures stable operation of the target, which alongside the purpose-built design of the target wheel, enables operation at rates up to 10 Hz. Stable and continuous laser-driven proton acceleration at 10 Hz is demonstrated, with observed cut-off energy stability about 15%.

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mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

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materials Futures 2024年第1期3卷 165-180页

作者： jonathan ruiz Esquius Alec P LaGrow Haiyan jin Zhipeng Yu Ana Araujo Rita marques Adélio mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre JoséVeigaBraga 4715-330Portugal Carbon Science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain Scientific Imaging Section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan Songshan Lake materials Laboratory Dongguan 523808People’s Republic of China Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal.

Proton exchange membrane(PEm)water electrolysis represents a promising technology for green hydrogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).Herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-hydroxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyO_(x)/ATO,20 wt.%(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 m HClO_(4)),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mAµgIr^(−1) and a large turnover frequency of 123 s^(−1) at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec^(−1),better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7µgIr cm^(−2).Importantly,IrNi1O_(x)/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm^(−2) for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir^(3+)/Ir^(4+)species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO_(2) based catalysts for PEm electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

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T1期乳腺肿瘤术前腋窝超声检查的价值

国际医学放射学杂志 2016年第3期 334-334页

作者： j.del Riego m.j.diaz-ruiz m.Teixidó j.Ribé m.Vilagran L.Canales 唐皓 Women’s Imaging Department of RadiologyUDIAT Centre DiagnòsticInstitut Universitari Parc Taulí-UAB

摘要目的 (1)探讨在p T1期肿瘤病人中腋窝超声检查(AUS)的诊断价值以及联合细针穿刺(FNA)能否提高诊断效能;(2)确定在满足美国外科医师协会(ACOSOG)Z0011标准的病人(淋巴结转移数目不超过2个)中腋窝超声检查的阴性预测值。材料与方法在... 详细信息

摘要目的 (1)探讨在p T1期肿瘤病人中腋窝超声检查(AUS)的诊断价值以及联合细针穿刺(FNA)能否提高诊断效能;(2)确定在满足美国外科医师协会(ACOSOG)Z0011标准的病人(淋巴结转移数目不超过2个)中腋窝超声检查的阴性预测值。材料与方法在355例p T1期乳腺肿瘤病人中,采

关键词：腋窝细针穿刺乳腺肿瘤 T1 超声检查

Nitric oxide and hydrogen sulfide share regulatory functions in higher plant events

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BIOCELL 2022年第1期46卷 1-5页

作者： FRANCISCO j.CORPAS SALVADOR GONZÁLEZ-GORDO mARTA RODRÍGUEZ-ruiz mARÍA A.mUÑOZ-VARGAS jOSÉm.PALmA Group of Antioxidants Free Radicals and Nitric Oxide in BiotechnologyFood and AgricultureDepartment of BiochemistryCell and Molecular Biology of PlantsEstación Experimental del Zaidín(Spanish National Research CouncilCSIC)Granada18008Spain

Nitric oxide(NO)and hydrogen sulfide(HS)are two molecules that share signaling properties in plant and animal cells NO and H2S originate two farmilies of de rived mol ecules designated reactive nitrogen and sulfur species(RNS and RSS,respectively).These molecules are responsible for certain protein regulatory processes through posttranslational modifications(PTms),being the most remarkable S nitrosation and persufidation,which afect the thiol group of cysteine *** and H2S can also exert regulatory functions due to their interaction through the iron present in proteins that contain heme groups or iron-sulfur dlusters,as reported mainly in animal ***,the available information in plant cells is still very limited thus *** higher plants,NO and H2S are involved in a myriad of physiological events from seed germination to fruit ripening,but also the mec hanism of response to biotic and abiotic stress *** vie wpoint manuscript highlights the functional regulatory parllelism of these two molecules which also interact with the metabolism of reactive oxygen species(ROS)in plant cells.

关键词： Ascorbate peroxidase Hydrogensulfide Nitricoxide Persulfidation S-nitrosation Signaling

Acute hepatitis with autoimmune features after COVID-19 vaccine:coincidence or vaccine-induced phenomenon?

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Gastroenterology Report 2022年第1期10卷 628-631页

作者： jose m.Pinazo-Bandera Alicia Hernandez-Albujar Ana Isabel Garcia-Salguero Isabel Arranz-Salas Raul j.Andrade mercedes Robles-diaz Division of Gastroenterology and Hepatology Instituto de Investigacion Biomedica de Malaga-IBIMAHospital Universitario Virgen de la VictoriaUniversidad de MalagaMalagaSpain Division of Anatomical Pathology Hospital Universitario Virgen de la VictoriaMalagaSpain Centro de Investigacion Biomedica en Red de Enfermedades Hepaticas y Digestivas(CIBERehd) MadridSpain

Introduction Autoimmune diseases result from a breach of immunological self-tolerance and tissue damage by autoreactive T *** acute respiratory syndrome coronavirus-2(SARS-CoV-2)infection is characterized by an inflam... 详细信息

关键词： autoimmune vaccine acute

Bull spermatozoa selected by thermotaxis exhibit high DNA integrity,specific head morphometry,and improve ICSI outcome

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journal of Animal Science and Biotechnology 2023年第3期14卷 1001-1011页

作者： Sara ruiz-diaz Rosane mazzarella Paula Navarrete-Lopez Raul Fernandez-Gonzalez Celia de Frutos maria maroto Claudia Cucala Paula Beltran-Brena marta Lombo Dimitrios Rizos Alfonso Gutierrez-Adan Department of Animal Reproduction INIA-CSIC28040 MadridSpain mistral Fertility Clinics S.L Clinica TambreCalle Tambre828002 MadridSpain

Background Sperm migration by thermotaxis is a guidance mechanism that operates along the oviduct and it has proved to be a valid method for selecting spermatozoa with low DNA fragmentation(SDF)in mice,humans,and *** study aimed to analyse if bull spermatozoa could be selected by thermotaxis and to assess their quality in terms of SDF as well as determine the presence of a specific sperm subpopulation based on sperm morphometry and assess their fertilizing capacity by *** We used frozen-thawed sperm from 6 bulls and sperm selection by thermotaxis was performed with TALP medium supplemented with 25 mmol/L of HEPES and 5 mmol/L of *** these conditions,sperm selection was achieved,obtaining a net thermotaxis of 3.6%.Subsequently,we analysed the SDF of the migrated and not-migrated spermatozoa using the neutral COmET assay,and we evaluated the size of the sperm head using Hemacolor■ staining with motic Images Plus 3 ***,migrated and not-migrated spermatozoa by thermotaxis were used to fertilize bovine in vitro matured(IVm)oocytes by ICSI,a very inefficient procedure in cattle that is only successful when the oocyte is artificially *** The results showed lower SDF(χ^(2),Pmeters(length and width,Pmeter and area,Pmatozoa migrated in comparison to those *** distribution of sperm subpopulations structure varied between groups,highlighting cluster 2,characterized by spermatozoa with small head size,and high ellipticity and elongated heads,as the most abundant in the thermotaxis migrated *** performed ICSI(without oocyte artificial activation)with the thermotactic sperm,the blastocyst rate was 32.2%±9.3%in the group microinjected with the thermotactic spermatozoa vs.8.3%±7.8%in the group of not-migrated sperm(χ^(2),Pm selection by thermotaxis has a much higher D

关键词： ART Bovine Sperm morphometry Sperm selection Thermotaxis

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.j. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.V. Addepalli m.j. Addison j. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik m.N. Agaras j. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait Tamlihat B. Aitbenchikh I. Aizenberg m. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi j. Albert P. Albicocco G.L. Albouy S. Alderweireldt m. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob B. Ali H.m.j. Ali S. Ali S.W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire B.m.m. Allbrooke j.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m.G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen j.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel m.T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki j.A. Aparisi Pozo m.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.j. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena j-F. Arguin S. Argyropoulos j.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah j. Assahsah K. Assamagan R. Astalos S. Atashi R.j. Atkin m. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Badea P. Bagnaia m. Bahmani A.j. Bailey V.R. Bailey j.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.m. Baldin P. Balek E. Ballabene F. Balli L.m. Baltes W.K. Balunas j. Balz E. Banas m. Bandieramonte A. Bandyopadhyay S. Bansal L. Barak m. Barakat E.L. Barberio D. Barberis m. Barbero m.Z. Barel K.N. Barends T. Barillari m-S. Barisits T. Barklow P. Baron D.A. Baron mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard model measurements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the measurement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS jET QUARK GLUON TAGGING

Flavor violating Higgs signals in the Texturized Two-Higgs Doublet model (THDm-Tx)

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Chinese Physics C 2016年第12期40卷 22-36页

作者： m. A. Arroyo-Urefna j. Lorenzo diaz-Cruz Enrique diaz javier A. Orduz-Ducuara Facultad de Ciencias Fisico-matematicas Benemerita Universidad Autonoma de Puebla C.P. 72570 Puebla Pue. Mexico.

Flavor violating Higgs signals, such as the top FCNC decay t→ch0 and the LFV Higgs decay h0→τμ, have been studied at the LHC. These signals can arise within the general Two-Higgs Doublet model （THDm）, where each Higgs doublet couples to all fermion types through Yukawa matrices Yf 1 and Y f2 . The Yukawa matrices can be assumed to have the same form or they could have different structures. In this paper we study the case when both Yf1 and Y f2 have completely different forms, but in such a way that they complement to produce a specific hermitian mass matrix. We find that for specific four-zero textures, the flavor violating Higgs couplings depend only on the free parameters tan β, γf and the fermion masses. We use the current bounds on the low energy processes to derive constraints on the heavy Higgs boson mass, tanβand γf Then, we use these constraints to evaluate the LFV Higgs decays, which reach branching ratios that could be tested at the LHC.

关键词： THDm LFV textures

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