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Journal of materials Science & Technology 2015年第8期31卷 806-814页

作者： A.Barroso-Bogeat m.alexandre-franco C.Fernndez-Gonzlez V.Gómez-Serrano Department of Organic and Inorganic Chemistry Faculty of SciencesUniversity of Extremadura

In catalysis processes, activated carbon （AC） and metal oxides （mOs） are widely used either as catalysts or as catalyst supports because of their unique properties. A combination of AC and mO nanoparticles in a single hybrid material usually entails both chemical and microstructural changes, which may largely influence the potential catalytic suitability and performance of the resulting product. Here, the prepa- ration of a wide series of AC-mO hybrid catalysts is studied. Three series of such catalysts are prepared by support first of mO （Al2O3, Fe2O3, SnO2, TiO2, WO3, and ZnO） precursors on a granular AC by wet impregnation and oven-drying at 120 ℃, and by subsequent heat treatment at 200 or 850℃ in inert atmosphere. Both the chemical composition and microstructure are mainly investigated by powder X-ray diffraction. Yield and ash content are often strongly dependent on the mO precursor and heat treatment temperature, in particular for the Sn catalysts. With the temperature rise, trends are towards the transformation of metal hydroxides into metal oxides, crystallinity improvement, and occurrence of drastic composition changes, ultimately leading to the formation of metals in elemental state and even metal carbides. Reaction paths during the preparation are explored for various hybrid catalysts and new insights into them are provided.

关键词： Activated carbon metal oxides Hybrid catalysts Preparation microstructural characterization X-ray diffraction

14-bit SAR ADC with On-Chip Digital Bubble Sorting Calibration Technology

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Chinese Journal of Electronics 2024年

作者： Hua FAN Zhuorui CHEN Tongrui XU franco maloberti Qi WEI Quanyuan FENG School of Integrated Circuit Science and Engineering (Exemplary School of microelectronics) University of Electronic Science and Technology of China (UESTC) Shenzhen Institute for Advanced Study Chongqing Institute of microelectronics Industry Technology Department of Electrical Computer and Biomedical Engineering University of Pavia Department of Precision Instrument Tsinghua University Institute of microelectronics Southwest Jiaotong University

This article designs a 14-bit successive approximation register analog-to-digital converter(SAR ADC).A novel digital bubble sorting calibration method is proposed and applied to eliminate the effect of capacitor mismatch on the linearity of the SAR ADC. To reduce the number of capacitors, a hybrid architecture of a high 8-bit binary-weighted capacitor array and a low 6-bit resistor array is adopted by the digital-to-analog(DAC). The common-mode voltage VCm-based switching scheme is chosen to reduce the switching energy and area of the DAC. The time-domain comparator is employed to obtain lower power consumption. Sampling is performed through a gate voltage bootstrapped switch to reduce the nonlinear errors introduced when sampling the input signal. moreover, the SAR logic and the whole calibration is totally implemented on-chip through digital integrated circuit(IC) tools such as Design Compiler, IC compiler, etc. Finally, a prototype is designed and implemented using 0.18 μm Bipolar-complementary metal oxide semiconductor(CmOS)-double-diffused mOS 1.8 V CmOS technology. The measurement results show that the SAR ADC with on-chip bubble sorting calibration method achieves the signal-to-noise-and-distortion ratio of 69.75 dB and the spurious-free dynamic range of 83.77 dB.

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The Early-middle Triassic Supervolcano in the Yangtze Block,South China and associated obstacles to biotic recovery

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Geoscience Frontiers 2024年第1期15卷 69-83页

作者： Haifeng Chen Hao Zou mSantosh Huawen Cao franco Pirajno Changcheng Huang mingcai Hou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengduSichuan 610059China College of Earth Science Chengdu University of TechnologyChengduSichuan 610059China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Science University of AdelaideAdelaideSA 5005Australia Yonsei Frontier Lab Yonsei UniversitySeoulSouth Korea Centre of Exploration Targeting The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia

The end-Permian mass extinction was one of the major global crises spanning the entire Early Triassic or *** of volcanos were one of the factors that delayed the biotic recovery after this *** eruptions can cause catastrophic effects on global environment,climate,and *** we investigate the tuff layers from Early-middle Triassic boundary in the Yangtze Block and identify a supervolcano eruption *** zircon U-Pb ages of the section-Langdai,section-Daijiagou and section-Longmendong tuff samples are 247.1±1.9 ma,247.6±2.0 ma and 247.7±1.7 ma,*** ages mark the Olenekian-Anisian *** zircon grains from the tuff layers have negativeεHf(t)(-15.3 to-0.8),two-stage Hf model(TDm2)ages(1.7 to 2.2 Ga)and display high-δ18O values(mostly>10‰).Clay minerals and quartz dominate the rock *** whole rock compositions show that the tuff layers were derived from magma of intermediate to felsic composition,which formed by the remelting of Paleoproterozoic materials of continental *** volcanic eruption site is located in the Jinshajiang-Ailaoshan-Song ma suture zone in the southwestern margin of the Yangtze Block.A combination of the closure of the Paleo-Tethys Ocean Basin and the collision of the Indochina Block and South China contributed to the eruption,which was a supervolcano eruption under the active continental margin arc *** speculate that this supervolcano eruption might have contributed to the delayed biotic recovery after the end-Permian mass extinction.

关键词： Early-middle Triassic Tuff layer Supervolcano Yangtze Block Biotic recovery

Expanding the Boundaries of the Chemical Space of DNA methyltransferase 1 modulators

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Computational molecular Bioscience 2024年第1期14卷 1-16页

作者： massyel S. martínez-Cortés Diana L. Prado-Romero José L. medina-franco DIFACQUIm Research Group Department of Pharmacy School of Chemistry Universidad Nacional Autónoma de México Avenida Universidad 3000 Mexico City México

DNA methyltransferase 1 (DNmT1), one of the main epigenetic targets, is involved in the duplication of the DNA methylation pattern during replication, and it is essential for proper mammalian development. Small molecule DNmT1 modulators are attractive for biochemical epigenetic studies and have the potential to become drugs. So far, more than five hundred small molecules have been reported as DNmT1 inhibitors. However, only a limited number of DNmT1 activators have been disclosed because, at least in part, DNmT1 activators are typically regarded as negative data in virtual screening campaigns or optimization projects. This manuscript aims to report the chemical structures and biological activity of small molecules that increase the enzymatic activity of DNmT1. Results of the biochemical experimental assays are discussed. It was found that small molecule activators have a large variety of chemical scaffolds but share pharmacophore features. Visual analysis of the chemical space and multiverse based on molecular fingertips supported that activators are structurally diverse. This is the first report of eight small molecules that increase the enzymatic activity of DNmT1 by more than 400% in an enzymatic-based assay. The outcome warrants further investigation of the epigenetic activity of the compounds in a counter-screen assay, e.g., cell-based and in vivo context.

关键词： Chemical multiverse Chemoinformatics Epigenetics Pharmacophore Hypothesis Small molecules

Final results of the first phase of the PROTO-SPHERA experiment: obtainment of the full current stable screw pinch and first evidences of the jet + torus combined plasma configuration

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Plasma Science and Technology 2024年第2期26卷 31-43页

作者： Paolo mICOZZI franco ALLADIO Alessandro mANCUSO Vincenzo ZANZA Gerarda APRUZZESE Francesca BOmBARDA Luca BONCAGNI Paolo BURATTI Francesco FILIPPI Giuseppe GALATOLA TEKA Francesco GIAmmANCO Edmondo GIOVANNOZZI Andrea GROSSO matteo IAFRATI Alessandro LAmPASI Violeta LAZIC Simone mAGAGNINO Simone mANNORI Paolo mARSILI Valerio PIERGOTTI Giuliano ROCCHI Alessandro SIBIO Benedetto TILIA Onofrio TUDISCO FSN Dipartimento Fusione e tecnologie per la Sicurezza Nucleare ENEA Agenzia Nazionale per Le Nuove Tecnologie Energia e lo Sviluppo Economico SostenibileFrascati(Rome)00044Italy IAPS Istituto di Astrofisica e Planetologia Spaziali INAF Istituto Nazionale di AstrofisicaRome O133Italy Physics Department University of Pisa Faculty of Natural Sciences Mathematics and PhysicsPisa 56127 Italy

In astrophysics, the boundary conditions for plasma phenomena are provided by nature and the astronomer faces the problem of understanding them from a variety of observations [Hester J J et al 1996 Astrophys. J. 456 225], on the other hand, in laboratory plasma experiments the electromagnetic boundary conditions become a major problem in the set-up of the machine that produces the plasma, an issue that has to be investigated step by step and to be modified and adapted with great patience, in particular in the case of an innovative plasma confinement experiment. The PROTO-SPHERA machine [Alladio F et al 2006 Nucl. Fusion 46 S613] is a magnetic confinement experiment, that emulates in the laboratory the jet + torus plasma configurations often observed in astrophysics: an inner magnetized jet of plasma centered on the(approximate) axis of symmetry and surrounded by a magnetized plasma torus orthogonal to this jet. The PROTO-SPHERA plasma is simply connected, i.e., no metal current conducting rod is linked to the plasma torus, while instead it is the inner magnetized plasma jet(in the following always called the plasma centerpost) that is linked to the torus. It is mandatory that no spurious plasma current path modifies the optimal shape of the plasma centerpost. moreover, as the plasma torus is produced and sustained, in absence of any applied inductive electric field, by the inner plasma centerpost through magnetic reconnections [Taylor J B and Turner m F 1989 *** 29 219], it is required as well that spurious current paths do not surround the torus on its outboard, in order not to lower the efficiency of the magnetic reconnections that maintain the plasma torus at the expense of the plasma centerpost. Boundary conditions have been corrected,up to the point that the first sustainment in steady state has been achieved for the combined plasma.

关键词： laboratory plasmas magnetic confinement astrophysical plasmas

Transperineal laser ablation of the prostate as a treatment for benign prostatic hyperplasia and prostate cancer: The results of a Delphi consensus project

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Asian Journal of Urology 2024年第2期11卷 271-279页

作者： Andrea Cocci marta Pezzoli Fernando Bianco franco Blefari Pierluigi Bove francois Cornud Gaetano De Rienzo Paolo Destefanis Danilo Di Trapani Alessandro Giacobbe Luca Giovanessi Antonino Laganà Giovanni Lughezzani Guglielmo manenti Gianluca muto Gianluigi Patelli Novello Pinzi Stefano Regusci Giorgio I.Russo Juan I.m.Salamanca matteo Salvi Luigi Silvestri Fabrizio Verweij Eric Walser Riccardo GBertolo Valerio Iacovelli Alessandro Bertaccini Debora marchiori Hugo Davila Pasquale Ditonno Paolo Gontero Gennaro Iapicca Theo m De Reijke Vito Ricapito Pierluca Pellegrini Andrea minervini Sergio Serni Francesco Sessa Department of Urology Careggi HospitalUniversity of FlorenceFlorenceItaly Urology Section University of FlorenceFlorenceItaly Urological Research Network MiamiFLUSA Urology Section Prato HospitalPratoItaly Torvergata Oncoscience Research Centre of Excellence TORDepartment of Experimental MedicineUniversity of Rome Tor VergataRomeItaly Department of Urology San Carlo di Nancy HospitalRomeItaly Department of Radiology Hôpital CochinParis Descartes UniversityParisFrance Urology and Andrology Unit II Department of Emergency and Organ TransplantationUniversity of BariBariItaly Unit of Urology Cittàdella Salute e della Scienza HospitalUniversity of TurinTurinItaly Urology Unit Buccheri La Ferla Fatebenefratelli HospitalPalermoItaly Department of Urology Humanitas Gradenigo HospitalTurinItaly Urology Unit Surgical DepartmentFondazione Poliambulanza Istituto OspedalieroBresciaItaly Departement of Urology “S.Giovanni Evangelista”HospitalTivoliItaly Humanitas Clinical and Research CentereIRCCS Department of UrologyRozzanoItaly Department of Biomedical Sciences Humanitas UniversityPieve EmanueleItaly Department of Biomedicine and Prevention University of Rome“Tor Vergata”RomeItaly Department of Diagnostic Imaging and Interventional Radiology University of Rome“Tor Vergata”RomeItaly Department of Interventional Radiology Pesenti-Fenaroli Hospital-ASST Bergamo EstAlzano LombardoItaly Department of Urology University of SienaSienaItaly Swiss International Prostate Center GenevaSwitzerland Clinique Générale Beaulieu GenevaSwitzerland Department of Urology University of CataniaItaly Department of Urology Puerta de Hierro-Majadahonda University HospitalMadridSpain Lyx Institute of Urology Universidad Francisco de VitoriaMadridSpain Department of medico-Surgical Sciences and Biotechnologies Sapienza University of RomeFaculty of Pharmacy and MedicineUrology Unit ICOTLatinaItaly Department of Urology European Institute of Oncology(IEO)IRCCSMilanItaly Department of Radiology D

Objective: To evaluate transperineal laser ablation (TPLA) with Echolaser® (Echolaser® TPLA, Elesta S.p.A., Calenzano, Italy) as a treatment for benign prostatic hyperplasia (BPH) and prostate cancer (PCa) using the Delphi consensus ***: Italian and international experts on BPH and PCa participated in a collaborative consensus project. During two rounds, they expressed their opinions on Echolaser® TPLA for the treatment of BPH and PCa answering online questionnaires on indications, methodology, and potential complications of this technology. Level of agreement or disagreement to reach consensus was set at 75%. If the consensus was not achieved, questions were modified after each round. A final round was performed during an online meeting, in which results were discussed and ***: Thirty-two out of forty invited experts participated and consensus was reached on all topics. Agreement was achieved on recommending Echolaser® TPLA as a treatment of BPH in patients with ample range of prostate volume, from mL (80%) to >80 mL (80%), comorbidities (100%), antiplatelet or anticoagulant treatment (96%), indwelling catheter (77%), and strong will of preserving ejaculatory function (100%). majority of respondents agreed that Echolaser® TPLA is a potential option for the treatment of localized PCa (78%) and recommended it for low-risk PCa (90%). During the final round, experts concluded that it can be used for intermediate-risk PCa and it should be proposed as an effective alternative to radical prostatectomy for patients with strong will of avoiding urinary incontinence and sexual dysfunction. Almost all participants agreed that the transperineal approach of this organ-sparing technique is safer than transrectal and transurethral approaches typical of other techniques (97% of agreement among experts). Pre-procedural assessment, technical aspects, post-procedural catheterization, pharmacological therapy, and expected outcomes were discussed, leading t

关键词： Transperineal laser ablation Prostatecancer Benignprostatic hyperplasia Delphi consensus

Study of fluctuations in the martian magnetosheath using a kurtosis technique:mars Express observations

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Earth and Planetary Physics 2022年第1期6卷 28-41页

作者： A.m.S.franco E.Echer m.J.A.Bolzan m.Fraenz National Institute for Space Research(INPE) Sao Jose dos CamposBrazil Federal University of Jatai JataiBrazil max Planck Institute for Solar System Research GöttingenGermany

Planetary magnetosheaths are characterized by high plasma wave and turbulence *** martian magnetosheath is no exception;both upstream and locally generated plasma waves have been observed in the region between its bow shock and magnetic boundary layer,its induced *** statistical study of wave activity in the martian magnetosheath is based on 12 years(2005-2016)of observations made during mars Express(mEX)crossings of the planet’s magnetosheath-in particular,data on electron density and temperature data collected by the electron spectrometer(ELS)of the plasma analyzer(ASPERA-3)experiment on board the mEX spacecraft.A kurtosis parameter has been calculated for these plasma *** value indicates intermittent behavior in the data when it is higher than 3(the value for a normal or Gaussian distribution).The variation of wave activity occurrence has been analyzed in relation to solar cycle,martian orbit,and distance to the bow ***-Gaussian properties are observed in the magnetosheath of mars on all analyzed scales,especially in those near the proton gyrofrequency in the upstream region of the martian *** also report that non-Gaussian behavior is most prominent at the smaller scales(higher frequencies).A significant influence of the solar cycle was also observed;the kurtosis parameter is higher during declining and solar maximum phases,when the presence of disturbed solar wind conditions,caused by large scale solar wind structures,*** kurtosis decreases with increasing distance from the bow shock,which indicates that the intermittence level is higher near the bow *** the electron temperature data the kurtosis is higher near the perihelion due to the higher incidence of EUV when the planet is closer to the Sun,which causes a more extended exosphere,and consequently increases the wave activity in the magnetosheath and its upstream *** extended exosphere seems to play a lower effect in the electron den

关键词： mars magnetosheath kurtosis ULF waves

New Record Ocean Temperatures and Related Climate Indicators in 2023

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Advances in Atmospheric Sciences 2024年第6期41卷 1068-1082页

作者： Lijing CHENG John ABRAHAm Kevin E.TRENBERTH Tim BOYER michael EmANN Jiang ZHU Fan WANG Fujiang YU Ricardo LOCARNINI John FASULLO Fei ZHENG Yuanlong LI Bin ZHANG Liying WAN Xingrong CHEN Dakui WANG Licheng FENG Xiangzhou SONG Yulong LIU franco RESEGHETTI Simona SImONCELLI Viktor GOURETSKI Gengxin CHEN Alexey mISHONOV Jim REAGAN Karina VON SCHUCKmANN Yuying PAN Zhetao TAN Yujing ZHU Wangxu WEI Guancheng LI Qiuping REN Lijuan CAO Yayang LU International Center for Climate and Environment Sciences Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of St.Thomas School of EngineeringMinnesota 55105USA NSF National Center for Atmospheric Research BoulderColorado 80307USA University of Auckland Auckland 1010New Zealand National Oceanic and Atmospheric Administration National Centers for Environmental InformationSilver SpringMaryland 20910USA Department of Earth and Environmental Science University of PennsylvaniaPhiladelphiaPennsylvania 19104USA Institute of Oceanology Chinese Academy of SciencesQingdao 266071China National marine Environmental Forecasting Center Ministry of Natural Resources of ChinaBeijing 100081China Oceanographic Data Center Chinese Academy of SciencesQingdao 266071China College of Oceanography Hohai UniversityNanjing 210098China National marine Data and Information Service Tianjin 300171China Italian National Agency for New Technologies Energy and Sustainable Economic DevelopmentS.Teresa Research CenterLerici 19032Italy Istituto Nazionale di Geofisica e Vulcanologia Sede di BolognaBologna 40128Italy South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China ESSIC/CISESS-mD University of MarylandCollege ParkMD20740USA mercator Ocean International Toulouse 31400France Eco-Environmental monitoring and Research Center Pearl River Valley and South China Sea Ecology and Environment AdministrationMinistry of Ecology and EnvironmentPRCGuangzhou 510611China National meteorological Information Center China Meteorological AdministrationBeijing 100081China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China

The global physical and biogeochemical environment has been substantially altered in response to increased atmospheric greenhouse gases from human *** 2023,the sea surface temperature(SST)and upper 2000 m ocean heat content(OHC)reached record *** 0–2000 m OHC in 2023 exceeded that of 2022 by 15±10 ZJ(1 Zetta Joules=1021 Joules)(updated IAP/CAS data);9±5 ZJ(NCEI/NOAA data).The Tropical Atlantic Ocean,the mediterranean Sea,and southern oceans recorded their highest OHC observed since the *** with the onset of a strong El Niño,the global SST reached its record high in 2023 with an annual mean of~0.23℃ higher than 2022 and an astounding>0.3℃ above 2022 values for the second half of *** density stratification and spatial temperature inhomogeneity indexes reached their highest values in 2023.

关键词： ocean heat content salinity stratification global warming climate

Textures, trace element compositions, and sulfur isotopes of pyrite from the Honghai volcanogenic massive sulfide deposit:Implications for ore genesis and mineral exploration

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Science China Earth Sciences 2023年第4期66卷 738-764页

作者： Zhiyuan SUN Xiaohua DENG franco PIRAJNO School of Resources and Civil Engineering Suzhou UniversitySuzhou 234000China Beijing Institute of Geology for mineral Resources Co. Ltd.Beijing 100012China Key Laboratory of Western China’s mineral Resources and Geological Engineering Ministry of EducationSchool of Earth Science and ResourcesChang’an UniversityXi’an 710054China Centre for Exploration Targeting School of Earth and EnvironmentUniversity of Western AustraliaCrawleyWA 6008Australia

In this paper, we present textures, trace element compositions, and sulfur isotope data for pyrite from the Honghai volcanogenic massive sulfide deposit to place new constraints on the source and evolution of the ore-forming fluids and provide insights into the ore genesis with implications for future exploration. The Honghai deposit consists of upper lenticular ores comprising massive sulfides that are underlain by stockwork and disseminated sulfides. The textural and isotopic characteristics of the synsedimentary framboidal pyrite(Syn-Py) indicate its formation by biogenetic processes. Coarse-grained pyrite generations(m-Py1, m-Py2, and m-Py3) from the massive sulfides have high Au, Ag, Cu, Zn, Pb, Sb, and Tl concentrations and low Co, Se, Te, Ti, and Sn concentrations, indicating that they precipitated from metal-rich, low-to intermediate-temperature,oxidizing fluids. The high Te, Ti, and Sn concentrations and high Co/Ni ratios in the massive pyrite(m-Py4) associated with magnetite in the massive sulfide lenses, as well as the high Ti, V, Cr, and Ni concentrations and low Al, mn, and Zn concentrations in the magnetite, suggest that the coexisting m-Py4 and magnetite precipitated under oxidizing and hightemperature(300℃ to 500℃) conditions. In contrast, pyrite grains from the underlying stockwork and veins(V-Py1, V-Py2, and V-Py3) are characterized by low Au, Ag, Cu, Zn, Pb, Sb, and Tl concentrations coupled with high Co, Se, Te, and Ti concentrations and high Co/Ni ratios, which are interpreted in terms of reducing and high-temperature ore-forming fluids. The large variations in δ^(34)S values from-6.4‰ to +29.9‰ suggest that the ore-forming fluids were derived from magmatic source that were significantly modified by seawater. The spatial variations of trace element assemblages of pyrite from different levels of the main massive orebodies can be used as an indicator for mineral exploration of Cu-Zn ores in the Honghai *** no significant difference in

关键词： Pyrite Trace element compositions Sulfur isotopes Ore-forming fluids Honghai volcanogenic massive sulfide deposit

The acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

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matter and Radiation at Extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei Thanh Ha Samuel Yoffe Lance Labun Stephen milton Edward mcCary michael m.Spinks Hernan J.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano Jose A.franco-Altamirano martin L.Ringuette Erhart Gaul Scott V.Luedtke Ganesh Tiwari Bernhard Ersfeld Enrico Brunetti Hartmut Ruhl Todd Ditmire Sandra Bruce michael E.Donovan michael C.Downer Dino A.Jaroszynski Bjorn manuel Hegelich University of Texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge