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Enhanced performance in the direct electrocatalytic synthesis of ammonia from N2 and H2O by an in-situ electrochemical activation of CNT-supported iron oxide nanoparticles

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能源化学：英文版 2020年第10期29卷 22-32页

作者： Shiming Chen Siglinda Perathoner Claudio Ampelli Hua Wei salvatore Abate Bingsen Zhang Gabriele Centi Dept.ChimBioFarAM 98166 MessinaItaly Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina Catalysis and Materials Division Institute of Metal ResearchChinese Academy of Sciences(IMR CAS)Shenyang Dept.MIFT(Industrial University of Messina ERIC aisbl and INSTM/CASPE98166 MessinaItaly

The direct electrocatalytic synthesis of ammonia from N2 and H2O by using renewable energy sources and ambient pressure/temperature operations is a breakthrough technology,which can reduce by over 90%the greenhouse gas emissions of this chemical and energy storage *** report here an in-situ electrochemical activation method to prepare Fe2O3-CNT(iron oxide on carbon nanotubes)electrocatalysts for the direct ammonia synthesis from N2 and *** in-situ electrochemical activation leads to a large increase of the ammonia formation rate and Faradaic efficiency which reach the surprising high values of 41.6μg mgcat^−1 h^−1 and 17%,respectively,for an in-situ activation of 3 h,among the highest values reported so far for non-precious metal catalysts that use a continuous-flow polymer-electrolytemembrane cell and gas-phase operations for the ammonia synthesis *** electrocatalyst was stable at least 12 h at the working *** by switching N2 to Ar evidence that ammonia was formed from the gas-phase *** analysis of the changes of reactivity and of the electrocatalyst characteristics as a function of the time of activation indicates a linear relationship between the ammonia formation rate and a specific XPS(X-ray-photoelectron spectroscopy)oxygen signal related to O2−in iron-oxide *** results together with characterization data by TEM and XRD suggest that the iron species active in the direct and selective synthesis of ammonia is a maghemite-type iron oxide,and this transformation from the initial hematite is responsible for the in-situ enhancement of 3-4 times of the TOF(turnover frequency)and NH3 Faradaic *** transformation is likely related to the stabilization of the maghemite species at CNT defect sites,although for longer times of preactivation a sintering occurs with a loss of performances.

关键词： Ammonia direct synthesis Electrochemical activation Heterogeneous catalysis Active sites N2 electrocatalytic conversion

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Encapsulated peracetic acid as a valid broad‑spectrum antimicrobial alternative,leading to beneficial microbiota compositional changes and enhanced performance in broiler chickens

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畜牧与生物技术杂志:英文版 2023年第5期14卷 2128-2142页

作者： salvatore Galgano Leah Conway Nikki Dalby Adrian Fellows Jos G.MHoudijk Monogastric Science Research Centre Scotland’s Rural CollegeWest Mains RoadEdinburgh EH93JGScotlandUK Aga2tech Ltd HalifaxUK Centre for Innovation Excellence in Livestock YorkUK

Background Antimicrobial alternatives are urgently needed,including for poultry production *** this study,we tested the potential broad-range antimicrobial alternative peracetic acid,delivered in feed via the hydrolysis of encapsulated precursors through a 28-day study using 375 Ross 308 broiler *** tested two peracetic acid concentrations,30 and 80 mg/kg on birds housed on re-used litter,and we evaluated the impact of both levels on gut microbial communities,bacterial concentration,antimicrobial resistance genes relative abundance and growth performance when compared to control birds housed on either clean or re-used *** Body weight gain and feed conversion ratio improved in peracetic acid fed *** d 28,birds given 30 mg/kg of peracetic acid had a decreased Firmicutes and an increased Proteobacteria abundance in the jejunum,accompanied by an increase in Bacillus,Flavonifractor and Rombustia in the caeca,and a decreased abundance of tetracycline resistance *** given 80 mg/kg of peracetic acid had greater caecal abundance of macrolides lincosamides and streptogramins resistance *** performance on clean litter was reduced compared to reused litter,which concurred with increased caecal abundance of Blautia,decreased caecal abundance of Escherichia/Shigella,Anaerostipes and Jeotgalicoccus,and greater gene abundance of vancomycin,tetracycline,and macrolides resistance *** Peracetic acid could be used as a safe broad-spectrum antimicrobial alternative in *** precursors were able to reduce the bacterial concentration in the jejunum whilst promoting the proliferation of probiotic genera in the caeca,especially at the low peracetic acid concentrations tested,and improve growth ***,our findings offer further insights on potential benefits of rearing birds on re-used litter,suggesting that the latter could be associated with better performance and reduced antimicrobial resistance

关键词： Antimicrobial alternative Antimicrobial resistance Broiler chicken Microbiota Peracetic acid Performance 16S rRNA gene

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Synthesis,microstructure,and properties of high purity Mo_(2)TiAlC_(2) ceramics fabricated by spark plasma sintering

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Journal of Advanced Ceramics 2020年第6期9卷 759-768页

作者： Yunhui NIU Shuai FU Kuibao ZHANG Bo DAI Haibin ZHANG salvatore GRASSO Chunfeng HU State Key Laboratory of Environment-Friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China

The synthesis,microstructure,and properties of high purity dense bulk Mo_(2)TiAlC_(2) ceramics were *** purity Mo_(2)TiAlC_(2) powder was synthesized at 1873 K starting from Mo,Ti,Al,and graphite powders with a molar ratio of 2:1:1.25:*** synthesis mechanism of Mo_(2)TiAlC_(2) was explored by analyzing the compositions of samples sintered at different *** was found that the Mo_(2)TiAlC_(2) phase was formed from the reaction among Mo3Al2C,Mo2C,TiC,and *** Mo_(2)TiAlC_(2) bulk sample was prepared by spark plasma sintering(SPS)at 1673 K under a pressure of 40 *** relative density of the dense sample was 98.3%.The mean grain size was 3.5μm in length and 1.5μm in *** typical layered structure could be clearly *** electrical conductivity of Mo_(2)TiAlC_(2) ceramic measured at the temperature range of 2-300 K decreased from 0.95×10^(6) to 0.77×10^(6)Ω^(-1)·m^(-1).Thermal conductivity measured at the temperature range of 300-1273 K decreased from 8.0 to 6.4 W·(m·K)^(-1).The thermal expansion coefficient(TEC)of Mo_(2)TiAlC_(2) measured at the temperature of 350-1100 K was calculated as 9.0×10^(-6) K^(-1).Additionally,the layered structure and fine grain size benefited for excellent mechanical properties of low intrinsic Vickers hardness of 5.2 GPa,high flexural strength of 407.9 MPa,high fracture toughness of 6.5 MPa·m^(1/2),and high compressive strength of 1079 *** at the indentation load of 300 N,the residual flexural strength could hold 84% of the value of undamaged one,indicating remarkable damage ***,it was confirmed that Mo_(2)TiAlC_(2) ceramic had a good oxidation resistance below 1200 K in the air.

关键词： MAX phase Mo_(2)TiAlC_(2) synthesis microstructure properties

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Imaging in liver transplantation

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World Journal of Gastroenterology 2009年第6期15卷 675-683页

作者： Settimo Caruso Roberto Miraglia Luigi Maruzzelli salvatore Gruttadauria Angelo Luca Bruno Gridelli Department of Diagnostic and Interventional Radiology Mediterranean Institute for Transplantation and Advanced Specialized Therapies(IsMeTT)University of Pittsburgh Medical Center ItalyVia Tricomi 1Palermo 90127Italy Department of Transplantation Surgery Mediterranean Institute for Transplantation and Advanced Specialized Therapies(IsMeTT) University of Pittsburgh Medical Center ItalyVia Tricomi 1 Palermo 90127Italy

The aim of this study was to illustrate the role of noninvasive imaging tools such as ultrasonography,multidetector row computed tomography,and magnetic resonance imaging in the evaluation of pediatric and adult liver recipients and potential liver donors,and in the detection of potential complications arising from liver transplantation.

关键词： Complications Liver donor Liver transplantation Magnetic resonance Multi detector computed tomography

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STARD1:a new rising StAR in cholesterol-mediated hepatocarcinogenesis

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Hepatobiliary Surgery and Nutrition 2021年第6期10卷 910-912页

作者： salvatore Papa Concetta Bubici Wing-Kin Syn Leeds Institute of Medical Research at St.James’ Faculty of Medicine and HealthUniversity of LeedsSt.James’University HospitalLeedsUK Centre for Genome Engineering and Maintenance Department of Life SciencesCollege of HealthMedicine and Life SciencesBrunel University LondonUxbridgeUK Division of Gastroenterology and Hepatology Medical University of South CarolinaCharlestonSCUSA Section of Gastroenterology Ralph H.Johnson Veterans Affairs Medical CenterCharlestonSCUSA Department of Physiology Faculty of Medicine and NursingUniversity of the Basque CountryUniversidad del Pais Vasco/Euskal Herriko Unibertsitatea(UPV/EHU)LeioaSpain

Having cholesterol in our body is essential for living healthy,but too much can lead to serious health problems,including-but not limited to-heart attacks and strokes(1).Indeed,accumulating evidence points to cholesterol as a cancer risk factor especially in colon,rectal,prostatic and testicular cancer(2).Cholesterol is the most abundant sterol in animal tissues with many important functions that spans from simply maintaining cell membrane physical properties to the production of bile acids and biosynthesis of steroid *** the most part,cholesterol is synthetised de novo in the liver,but some is obtained from dietary *** synthesis of cholesterol takes place in the cytoplasm and the endoplasmic reticulum(ER)of hepatocytes(the major liver cell types)and starts with one molecule of acetyl-CoA.

关键词： cholesterol intake cancer

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The impact of Pinus halepensis afforestation on Mediterranean spontaneous vegetation:do soil treatment and canopy cover matter?

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Journal of Forestry Research 2012年第4期23卷 517-528页

作者： Pasta salvatore Tommaso La mantia Juliane Rühl Dipartimento DEMETRA Università di PalermoViale delle ScienzeEd.4Ingr H90128 PalermoItaly.

We investigated central Mediterranean Pinus halepensis plantations under semi-arid climate in order to evaluate the combined effect of soil treatment and afforestation practices on spontaneous plant species composition, richness and evenness, and on the trend and speed of vegetation dynamics. Phytosociological releves of three different plot typologies, i.e. （1） soil-treatment and plantation, （2） only soil-treatment, （3） no soil-treatment and no plantation, were compared by （a） multivari- ate analysis and （b） with reference to species richness and evenness. Moreover, in order to compare vegetation dynamics within the planta- tions with those ones ongoing in semi-natural garrigue communities, we compared life form and syntaxonomic spectra between phytosociological relev6s taken at 8 years of distance. DCA showed that floristic species composition and similarity are influenced by the canopy cover of Pine trees as well as by soil-treatment practices. Although species richness and evenness are not clearly related to neither soil treatment nor Pine afforestation, canopy cover clearly plays a major role： in fact, the highest Ph cover rates correspond to the lowest values of understory species richness. This is true also if only species of biogeographical/conservation interest are considered. Regarding vegetation dynamics, sites with dense Pine canopy cover evolve much slower than the adjacent garrigue communities. The same factors invoqued to explain the patterns of floristic composition and similarity （i.e. allelopathy and competition for light, water and nutrients） may also explain the lowering of diversity of therophytes and the strong decline of the cover perfomed by both therophytes and hemicryptophytes underneath the canopy of dense Ph plantations. Thus, in sites where Ph cover exceeds about 80%, thinning is recommended not only in order to accelerate succession, but also to give a natural ＇shape＇ to afforestations.

关键词： plant diversity understory vegetation dynamics plantation

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Acorn size and tolerance to seed predators:the multiple roles of acorns as food for seed predators,fruit for dispersal and fuel for growth

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Integrative Zoology 2018年第3期13卷 251-266页

作者： Andrew W.BARTLOW salvatore JAGOSTA Rachel CURTIS Xianfeng YI Michael ASTEELE Department of Biology and The WIESS Institute for Environmental Science and Sustainability Wilkes UniversityWilkes BarrePennsylvaniaUSA Present address:Department of Biology University of UtahSalt Lake CityUtahUSA Center for Environmental Studies and Department of Biology Virginia Commonwealth UniversityRichmondVirginiaUSA Present address:Department of Veterinary Integrative Biosciences Texas A&M UniversityCollege StationTexasUSA College of Life Sciences Jiangxi Normal UniversityNanchangJiangxiChina.

Fitness of parents and offspring is affected by offspring *** oaks(Quercus spp.),acorns vary considerably in size across,and within,*** size influences dispersal and establishment of oaks,but it is not known whether size imparts tolerance to seed ***,we examine the relative extent to which cotyledon size serves as both a means for sustaining partial consumption and energy reserves for developing seedlings during early stages of *** of 6 oak species were damaged to simulate acorn predation by vertebrate and invertebrate seed *** germination/emergence and growth rates were used to assess seedling *** predicted that if cotyledons are important for dispersal,acorns should show tolerance to partial seed ***,if the cotyledon functions primarily as an energy reserve,damage should significantly influence seedling *** of each species germinated and produced seedlings even after removing>50%of the *** mass explained only some of the variation in *** species,larger acorns performed better than smaller acorns when *** acorns performed as well or better than damaged *** was no pattern among individual species with increasing amounts of *** some species,simulated invertebrate damage resulted in the poorest performance,suggesting alternative strategies of oaks to sustain *** cotyledons in acorns may be important for attracting seed dispersers and sustaining partial damage,while also providing energy to young *** of oak establishment may follow from the resilience of acorns to sustain damage at an early stage.

关键词： acorns damage tolerance dispersal Quercus seed size

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Unmet needs in preoperative biliary stenting for patient candidates for pancreaticoduodenectomy: a viewpoint

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Hepatobiliary Surgery and Nutrition 2019年第4期8卷 426-427页

作者： salvatore Paiella Matteo De Pastena Roberto Salvia General and Pancreatic Surgery Unit Pancreas Institute University of Verona Verona Italy

We read with great interest the article published in Annals of Surgery, "Preoperative Biliary Stenting and Major Morbidity After Pancreatoduodenectomy: Does Elapsed Time Matter? The FRAGERITA Study Group" (1). The timing of preoperative biliary stenting (PBS) and its impact on postoperative outcomes after pancreaticoduodenectomy (PD) are ever-burning issues for pancreatologists dealing with jaundice due to periampullary tumors.

关键词： Surgery preoperative stent

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A multi-agent system for itinerary suggestion in smart environments

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CAAI Transactions on Intelligence Technology 2021年第4期6卷 377-393页

作者： Alessandra De Paola salvatore Gaglio Andrea Giammanco Giuseppe Lo Re Marco Morana Universita degzi studi di Palermo PalermoItaly Srart Cities and Comtnunitics Natioral Jab CINI-Consorzio Interuniversitario Nazionale per l'Infortnatica PalerinoItaly

Modem smart environments pose several challenges,among which the design of intelligent algorithms aimed to assist the *** a variety of points of interest are available,for instance,trajectory recommendations are needed to suggest users the most suitable itineraries based on their interests and contextual *** in many cases,these interests must be explicitly requested and their lack causes the so-called cold-start ***,lengthy travelling distances and excessive crowdedness of specific points of interest make itinerary planning more *** address these aspects,a multi-agent itinerary suggestion system that aims at assisting the users in an online and collaborative way is proposed.A profiling agent is responsible for the detection of groups of users whose movements are characterised by similar semantic,spatial and temporal features;then,a recommendation agent leverages contextual information and dynamically associates the current user with the trajectory clusters according to a Multi-Armed Bandit policy;Framing the trajectory recommendation as a reinforcement learning problem permits to provide high-quality suggestions while avoiding both cold-start and preference elicitation *** effectiveness of the approach is demonstrated by some deployments in real-life scenarios,such as smart campuses and theme parks.

关键词： artificial intelligence pattern recognition

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Numerical study of the splashing wave induced by a seaplane using mesh-based and particle-based methods

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Theoretical & Applied Mechanics Letters 2023年第5期13卷 375-381页

作者： Yang Xu Peng-Nan Sun Xiao-Ting Huang salvatore Marrone Lei-Ming Geng School of Ocean Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China CNR-INM.Institute of Marine Engineering Rome 00128Italy AVIC General Huanan Aircraft Industry Co. LtdZhuhai 519080China

In recent years,forest fires and maritime accidents have occurred frequently,which have had a bad impact on human production and ***,the development of seaplanes is an increasingly urgent *** is important to study the taxiing process of seaplanes for the development of seaplanes,which is a strong nonlinear fluid-structure interaction *** this paper,the smoothed particle hydrodynamics(SPH)method based on the Lagrangian framework is utilized to simulate the taxiing process of seaplanes,and the SPH results are compared with those of the finite volume method(FVM)based on the Eulerian *** results show that the SPH method can not only give the same accuracy as the FVM but also have a strong ability to capture the splashing waves in the taxiing process,which is quite meaningful for the subsequent study of the effect of a splash on other parts of the seaplane.

关键词： Seaplane Splashing Fluid-structure interactions SPH Method

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