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Competition between fusion-evaporation and multifragmentation in central collisions in ^(58)Ni+^(48)Ca at 25A MeV

Nuclear Science and Techniques 2013年第5期24卷 82-88页

作者： fRANCALANZA L AbbONdaNNO U AMORINI f bARLINI S bINI M bOUGAULT R bruno M CARDELLA G CASINI G AGOSTINO M D' De fILIPPO V De SANCTIS J GERACI E GIUSSANI A GRAMEGNA f GUIOT b KRAVCHUK V La GUIdaRA E LANZALONE G Le NEINDRE N MAIOLINO C MARINI P MORELLI L OLMI A PAGANO A PAPA M PIANTELLI S PIRRONE S POLITI G POGGI G PORTO f RUSSOTTO P RIZZO f VANNINI G VANNUCCI L INfN Laboratori Nazionali del Sud-LNS Catania 95123Italy Dipartimento di fisica Universitàdi Catania I-95129Italy INfN Sezione di Trieste Trieste I-34127Italy Dipartimento di fisica Universitàdi FirenzeINFN Sezione di Firenze 1-50139Italy LPC Caen IN2P3-CNRS/ENSICAEN and UniversitéF-14050 Caen cedex 5-140France Dipartimento di fisica Universitàdi Bologna and INFN Sezione di Bologna 4-50121Italy INfN Sezione di Catania I-95129 Italy INfN Sezione di firenze I-50139 Italy Dipartimento di fisica Universitàdi Milano and INFN Sezione di Milano1-20126Italy INfN Laboratori Nazionali di Legnaro 1-35020 Italy Centro Siciliano di fisica Nucleare e Struttura della Materia Catania 1-95129Italy UniversitàKore Enna 1-94100Italy

The experimental data concerning the58Ni+48Ca reaction at Elab(Ni)=25A MeV,collected by using the CHIMERA 4π device,have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the fermi energy *** a main criterion for centrality selection we have chosen the flow angle(flow) method,making an event-by-event analysis that considers the shape of events,as it is determined by the eigenvectors of the experimental kinetic-energy *** the selected central events(flow >60°) some global variables,good to characterize the pattern of central collisions have been *** main features of the reaction products were explored by using different constraints on some of the relevant observables,like mass and velocity distributions and their *** emphasis was devoted,for central collisions,to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a possible multifragmentation mechanism of a well defined(if any) transient nuclear *** evolution of the system and pre-equilibrium emission were taken into account by simulating the reactions in the framework of transport *** approaches have been envisaged(dynamical stochastic bNV calculations + sequential SIMON code,QMD,CoMD,etc.).Preliminary comparison of the experimental data with bNV calculations shows reasonable agreement with the assumption of sequential multifragmentation emission in the mass region of IMfs close to the heavy *** deviations from sequential processes were found for those IMfs in the region of masses intermediate between the mass of heavy residues and the mass of light *** simulations are in *** experimental analysis will be enriched also by information obtained inspecting the IMf-IMf correlation function,in order to elucidated the nature of space-time decay property of the emitting source associated with events having

关键词：多重碎裂中心碰撞蒸发过程 MeV 竞争熔合国际货币基金组织事件分析

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Influence of MIG/MAG Welding Process on Mechanical and Pitting Corrosion behaviors on the Super-Duplex Stainless Steel SAf 2507 Welded Joints

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Materials Sciences and Applications 2018年第2期9卷 228-245页

作者： bruno Leonardy S. Lopes Samuel f. Rodrigues Eden S. Silva Gedeon S. Reis Waldemir dos P. Martins Juvenilson costa damascena Valdemar S. Leal Graduate Program in Materials Engineering Federal Institute of Education Science and Technology of Maranh&atilde o—IfMA S&atilde o Luís MA Brazil Engineering Coordination Universidade UNICEUMA S&atilde o Luís MA Brazil

The main objective of this research is to better understand the correlation between the constituent phases presented in the super-duplex steel SAf 2507 when it is under welding process by arc shielding gas MIG-MAG (Metal Inert Gas-Metal Active Gas). Conventional short circuit transfer and derivative STT (Surface Tension Transfer) using the 2594 welding wire as a filler metal and the effects on welding power in hardness, toughness and pitting corrosion are considered here. The results showed that the welding energy (Ew) changed the α/γ-phase’s balance and occasionally formed σ-phase in ferrite grain boundaries which led to changes in hardness, toughness and pitting corrosion resistance in molten zone (MZ), heat activated zone (HAZ) and metal base regions (Mb). furthermore, the increased amount of γ-phase improved the pitting corrosion resistance index (PRENγ) mainly in the MZ. This is due to decrease of α-phase fraction and formation of coarser grains, for higher welding energy. The toughness in the MZ decreased with less formation of γ-phase, coalescence of ferritic grains and localized formation of σ-phase, raising the hardness in the HAZ when the welding energy was lower.

关键词： Super-Duplex Steels Welding Toughness Pitting Corrosion Microhardness

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The dynamics of ant mosaics in tropical rainforests characterized using the Self-Organizing Map algorithm

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Insect Science 2016年第4期23卷 630-637页

作者： Alain Dejean frederic Azemar Regis Cereghino Maurice Leponce bruno Corbara Jereme Orivel Arthur Compin CNRS Laboratoire Ecologie Fonctionnelle et Environnement (UMR-CNRS 5245) 31062 Toulouse Universite de Toulouse UPS INP Ecolab 118 route de Narbonne 31062 Toulouse E-cologie des forets de Guyane Campus agronomique BP 316 97387 Kourou cedex France biodiversity Monitoring and Assessment Unit Royal Belgian Institute of Natural Sciences Rue Vautier 29 B-1000 Brussels Belgium CNRS Laboratoire Microorganismes Genome et Environnement (UMR-CNRS 6023) Universite Blaise Pascal Complexe Scientifique des Cezeaux 63177 Aubiere cedex Clermont Universite Universite Blaise Pascal LMGE BP 10448 F-63000 Clermont-Ferrand France

Ants, the most abundant taxa among canopy-dwelling animals in tropical rainforests, are mostly represented by territorially dominant arboreal ants （Tdas） whose territories are distributed in a mosaic pattern （arboreal ant mosaics）. Large Tda colonies regulate insect herbivores, with implications for forestry and agronomy. What generates these mosaics in vegetal formations, which are dynamic, still needs to be better understood. So, from empirical research based on 3 Cameroonian tree species （Lophira alata, Ochnaceae; Anthocleista vogelii, Gentianaceae; and barteriafistulosa, Passifloraceae）, we used the Self-Organizing Map （SOM, neural network） to illustrate the succession of Tdas as their host trees grow and age. The SOM separated the trees by species and by size for L. alata, which can reach 60 m in height and live several centuries. An ontogenic succession of Tdas from sapling to mature trees is shown, and some ecological traits are highlighted for certain Tdas. Also, because the SOM permits the analysis of data with many zeroes with no effect of outliers on the overall scatterplot distributions, we obtained ecological information on rare species. finally, the SOM permitted us to show that functional groups cannot be selected at the genus level as congeneric species can have very different ecological niches, something particularly true for Crematogaster spp., which include a species specifically associated with b. fistulosa, nondominant species and Tdas. Therefore, the SOM permitted the complex relationships between Tdas and their growing host trees to be analyzed, while also providing new information on the ecological traits of the ant species involved.

关键词： ant plant relationships dynamics of associations myrmecophytes tropicalrainforests

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Understanding bark thickness variations for Araucaria angustifolia in southern brazil

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Journal of forestry Research 2021年第3期32卷 1077-1087页

作者： Emanuel Arnoni costa Veraldo Liesenberg César Augusto Guimaraes finger Andréfelipe Hess Cristine Tagliapietra Schons Graduate Program in forest Engineering Santa Catarina State University(UDESC)LagesSC 88520-000Brazil Department of forest Engineering Federal University of Uberlandia(UFU)Monte CarmeloMG 38500-000Brazil Graduate Program in forest Engineering Federal University of Santa Maria(UFSM)Santa MariaRS 97105-900Brazil Graduate Program in Agroecosystems Federal Technological University of Parana(UFTPR)Dois VizinhosPR 85660-000Brazil

This study aimed to understand bark thickness variations of Araucaria angustifolia(bertol.)Kuntze trees growing in natural forest remnants in southern brazil,and their relationship with quantitative and qualitative *** thickness must be accurately estimated in order to determine timber volume *** is an important variable for the sustainable management and conservation of araucaria *** spite of its importance and visibility,bark thickness variations have not been evaluated for this key species in southern brazil.A total of 104 trees were selected,and their qualitative and quantitative attributes such as diameter at breast height(D_(bH)),height(H),crown base height(C_(bH)),crown length(C_(L)),social position(S_(P)),stoniness(S_(T)),position on the relief(P_(R)),vitality(V_T)and branch arrangement(b_(A))were *** trees were categorized into two groups:red bark or gray *** analysis and artificial neural networks(ANN)were used for modelling bark *** results indicate that:(1)bark thickness showed good correlation to D_(bH),with 0.76 as coefficient of determination(RS_P),0.540 as Mean Absolute Error(M_(AE))and 22.4 root-meansquare error in percentage(R_(MSE%));(2)the trend changed according to bark colour,with significant differences for the intersection(_0–Pr>f:p=0.0124)and slope(β_(1)–Pr>f:p=0.0126)of bark thickness curves between groups;(3)the highest correlation of bark thickness was found with:D_(bH)(ρ=0.88),H(ρ=0.58),C_(bH)(ρ=0.46),S_(P)(ρ=-0.52),and b_(A)(ρ=-0.32);(4)modelling with ANN confirmed high adjustment(R^(2)=0.99)and accuracy(R_(MSE%)=3.0)of the *** is an efficient and robust technique for the modelling of various qualitative and quantitative attributes commonly used in forest *** effective use of ANN to estimate araucaria bark in natural forests reinforces its potential,besides the possibility of application for other forest species.

关键词： Dendrometry attributes Crown characteristics Prediction models bark factor Parana-pine

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Sheltered preservation of cyrtocrinid crinoids from the Lower Cretaceous of Madagascar and their palaeogeographic significance

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Journal of Palaeogeography 2023年第1期12卷 69-81页

作者： Mariusz A.Salamon Sreepat Jain Marcin Krajewski Piotr Duda bruno ferre Mohamed benzaggagh bartosz J.Plachno University of Silesia in Katowice Faculty of Natural SciencesBedzinska 60PL-41-200 SosnowiecPoland Department of Geology School of Applied Natural ScienceAdama Science and Technology UniversityETH-1888 AdamaOromiaEthiopia AGH University of Science and Technology Faculty of GeologyGeophysics and Environmental ProtectionAl.A.Mickiewicza 30PL-30-059 KrakowPoland University of Silesia in Katowice Faculty of Science and TechnologyBedzinska Street 3941-200 SosnowiecPoland 2 rue Guy de Maupassant F-76800 SaintEtienne du RouvrayFrance Universite Moulay Ismail Faculte des SciencesDepartement de GeologieBP 11.201ZitouneMeknesMorocco Jagiellonian University in Krakow Faculty of BiologyInstitute of BotanyGronostajowa Street 9PL-30-387 CracowPoland

Sheltered preservation,in which organisms are trapped within shells of cephalopods,is a wellknown *** preservational style constitutes an important source of paleontological ***,we report the first crinoid preserved inside the early Albian ammonite Cleoniceras besairiei Collignon from *** crinoid is assigned to the aspidocrinid phyllocrinid(Apsidocrinus,Phyllocrinidae),and constitutes the first phyllocrinid from the African continent,the second from the southern margin of the Tethys(after New Zealand),and also from the southern *** specimen represents the youngest occurrence of a phyllocrinid in the world as well,and constitutes one of the youngest occurrences of cyrtocrinids from shallow sea environments,before predation-induced migration of the stalked crinoids to the deep sea refugia due to the so-called Mesozoic Marine *** finding highlights that ammonite shells may also be a convenient material for studying echinoderms.

关键词： Echinoderms Crinoids Cyrtocrinids Cretaceous Madagascar Africa

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Lack of Relationship between Testicular Echotexture and Seminal Characteristics in Adult Texel Rams

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Agricultural Sciences 2018年第8期9卷 936-946页

作者： Mariana A. G. Urt Edwin W. b. bakarji fábio J. C. faria Elisvania f. Santos Deiler S. costa federal University of Mato Grosso do Sul Campo Grande Brazil

The objective of this study was to determine the minimum representative area to evaluate testicular echotexture parenchyma and to identify the correlations between the intensity of pixels of the testicular parenchyma and the fibrosis score with the physical and morphological characteristics of the ejaculate of Texel rams. The study used 88 Texel rams, aged between 10 and 12 months, and reared in a semi-extensive system. The animals underwent breeding soundness evaluation (bSE) and ultrasound of the testicles. The images were transferred to a computer where they were defined in areas of 400, 1600, 3600, and 6400 mm2, after which the average intensity of the pixels of each image of the testicular regions was evaluated. A testicular fibrosis score was assigned in order to quantify the frequency of fibrotic lesions. In relation to the intensity of pixels of the predetermined regions, only the area of 400 mm2 presented a difference (P mm2 being the smallest area that best represented the testicular parenchyma. There were no correlations between the intensity of pixels of the testicular parenchyma and the fibrosis score with the physical and morphological characteristics of the ejaculate of the rams.

关键词： Ovine breeding Soundness Evaluation Testicular Ultrasound

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Exosomal glypican-1 is elevated in pancreatic cancer precursors and can signal genetic predisposition in the absence of endoscopic ultrasound abnormalities

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World Journal of Gastroenterology 2022年第31期28卷 4310-4327页

作者： Pedro Moutinho-Ribeiro Ines A batista Sofia T Quintas bárbara Adem Marco Silva Rui Morais Armando Peixoto Rosa Coelho Pedro costa-Moreira Renato Medas Susana Lopes filipe Vilas-boas Manuela baptista Diogo Dias-Silva Ana L Esteves filipa Martins Joanne Lopes Helena barroca fátima Carneiro Guilherme Macedo Sonia A Melo Serviço de Gastrenterologia Centro Hospitalar Universitário de Sao JoaoPorto 4200Portugal faculty of Medicine University of PortoPorto 4200Portugal Instituto de Investigacao e Inovacao em Saúde(i3S) Universidade do PortoPorto 4200Portugal IPATIMUP-Institute of Molecular Pathology and Immunology University of PortoPorto 4200Portugal Instituto de Ciencias biomédicas Abel Salazar(ICbAS) University of PortoPorto 4050Portugal Servico de Cirurgia Geral Centro Hospitalar Universitário de Sao JoaoPorto 4200Portugal Unidade de Saúde familiar Serpa Pinto ACeS Porto OcidentalPorto 4250Portugal Serviço de Anatomia Patológica Centro Hospitalar Universitário de Sao JoaoPorto 4200Portugal

bACKGROUND Individuals within specific risk groups for pancreatic ductal adenocarcinoma(PdaC)[mucinous cystic lesions(MCLs),hereditary risk(HR),and new-late onset diabetes mellitus(NLOD)]represent an opportunity for early cancer *** ultrasound(EUS)is a premium image modality for PdaC screening and precursor lesion *** no specific biomarker is currently clinically available for this purpose,glypican-1(GPC1)is overexpressed in the circulating exosomes(crExos)of patients with PdaC compared with healthy subjects or those harboring benign pancreatic *** To evaluate the capacity of GPC1+crExos to identify individuals at higher risk within these specific groups,all characterized by *** This cross-sectional study with a prospective unicentric cohort included 88 subjects:40 patients with MCL,20 individuals with HR,and 20 patients with NLOD.A control group(CG)was submitted to EUS for other reasons than pancreatic pathology,with normal pancreas and absence of hereditary risk factors(n=8).The inclusion period was between October 2016 and January 2019,and the study was approved by the Ethics Committee of Centro Hospitalar Universitário de São João,Porto,*** patients provided written informed *** and blood tests for quantification of GPC1+crExos by flow cytometry and carbohydrate antigen 19-9(CA 19-9)levels by ELISA were performed in all ***-guided tissue acquisition was done whenever *** statistical analysis,SPSS®27.0(IbM Corp.,Armonk,NY,United States)version was *** graphs were created using GraphPad Prism 7.00(GraphPad Software,San Diego,CA,United States).RESULTS Half of MCLs harbored worrisome features(Wf)or high-risk stigmata(HRS).Pancreatic abnormalities were detected by EUS in 10.0%and 35.0%in HR and NLOD individuals,respectively,all considered non-malignant and“harmless.”Median levels of GPC1+crExos were statistically different:MCL[99.4%,interquartile range(IQR):94.9%-99.8%],HR(8

关键词： Glypican-1 Circulating exosomes Endoscopic ultrasound Pancreatic cancer risk groups Pancreatic cancer precursor lesions Genetic predisposition

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Disruption of biofilms from sewage pipes under physical and chemical conditioning

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Journal of Environmental Sciences 2009年第1期21卷 120-126页

作者： Charbel Mahfoud Antoine El Samrani Rita Mouawad Walid Hleihel Rim El Khatib bruno S. Lartiges Nam Ouani Holy Spirit University of Kaslik(USEK) Faculty of Sciences and Computer Engineering Department of Chemistry and Life SciencesWater and Environment Laboratory. P.B. 446JouniehLebanon Nancy University LEM-ENSG/INPL-CNRSPole de l'Eau15Avenue du CharmoisBP 40-F-54501 Vandoeuvre CedexFrance

biofilms grown inside two sewage collecting pipes located in industrial and residential areas are studied. bacterial biomass inside three layers of biofilms was evaluated. biofilm cohesion under different mixing rate and ionic strength was also investigated. Effects of physical and chemical parameters in the biofilms were evaluated by monitoring turbidity, chemical and biochemical oxygen demands. Extracted organic matter from biofilms was partitioned to polar, aromatic and saturated fractions using activated silica column chromatography. Results revealed that bacterial biomass growth depending on biofilm thickness and stratification. The most loaded stratum in bacteria/biomass was the sewage-biofilm interface stratum that represented 51% of the total bacteria/biomass. Stirring rate and ionic strength of mono- and bivalent salts showed a major influence in biofilm disruption. The stirring time enhanced the exchange dynamic and matter capture between biofilm fragments at the critical stirring rate 90 r/min. Sodium chloride showed the dispersing effect on biofilms in suspension, and decreased the bOD5 （biochemical oxygen demand） beyond the physiological salt concentration.

关键词： biofilms, biochemical oxygen demand (bODs) chemical oxygen demand (COD) biomass ionic strength

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Seasonal flavonoid Profile and Kaempferitrin Content in the Leaf Extracts of bauhinia forficata Subspecies forficata from Two Locations in Southeastern brazil

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American Journal of Plant Sciences 2019年第1期10卷 208-220页

作者： Joao b.f.Tostes Antonio C.Siani Sérgio S.Monteiro Vinicius f.Melo Jéssica O.costa Ligia M.M.Valente Department of Natural Products Oswaldo Cruz FoundationRio de JaneiroBrazil forum Itaboraí Oswaldo Cruz FoundationPetrópolisBrazil Chemistry Institute Federal University of Rio de JaneiroRio de JaneiroBrazil

The leaves of bauhinia forficata L. (fabaceae) are used in brazilian folk medicine mainly as antidiabetic agent. They are rich in polyphenols, and kaempferitrin and other flavonoids are currently considered as basic chemical criteria for the quality and the effectiveness of extracts and phytopharmaceuticals derived from them. Aiming to expand the scope of current data of the chemical profile of b. forficata subsp. forficata, the present study employed HPLC-daD and HPLC-daD-ESI/MS to compare the flavonoid profile and kaempferitrin content in the leaves of specimens collected seasonally during one year, in two different locations in Southeastern brazil: Rio de Janeiro (RJ) and São Paulo (SP) states. The data showed a variation in the flavonoid profile and in the kaempferitrin content depending on the place of collection and the season of the year. The target compound, kaempferitrin, was found to be only a minor constituent in RJ (0.21 - 1.02 μg/mg), and was mostly absent or occurred as trace in SP location (0.00 - 0.12 μg/mg). Some degree of similarity was observed in the flavonoid profiles according to the region of collection. In agreement with some published reports, the low and quite variable kaempferitrin content as well the wide variability of the flavonoid profiles brings into question the dubious matter of using these compounds as chemical markers for this medicinal species.

关键词： bauhinia forficata Kaempferitrin flavonoids HPLC-daD

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No independent associations between physical activity and clinical outcomes among hospitalized patients with moderate to severe COVID-19

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Journal of Sport and Health Science 2021年第6期10卷 690-696页

作者： Ana J.Pinto Karla f.Goessler Alan L.fernandes Igor H.Murai Lucas P.Sales bruna Z.Reis Mayara Diniz Santos Hamilton Roschel Rosa M.R.Pereira bruno Gualano Applied Physiology and Nutrition Research Group School of Physical Education and SportClinical Hospital HCFMUSPSchool of Medicine FMUSPUniversity of Sao PauloSao PauloSP 01246903Brazil Rheumatology Division Clinical Hospital HCFMUSPSchool of Medicine FMUSPUniversity of Sao PauloSao PauloSP 01246903Brazil food Research Center University of Sao PauloSao PauloSP 05508080Brazil

background:Regular physical activity(PA)has been postulated to improve,or at least maintain,immunity across the life ***,the link between physical(in)activity and coronavirus disease 2019(COVID-19)remains to be *** small-scale prospective cohort study is nested within a randomized controlled trial aimed to investigate the possible associations between PA levels and clinical outcomes among hospitalized patients with moderate to severe ***:Hospitalized patients with COVID-19(mean age:54.9 years)were recruited from the Clinical Hospital of the School of Medicine of the University of Sao Paulo(a quaternary referral teaching hospital)and from Ibirapuera field Hospital,both located in Sao Paulo,*** level was assessed using the baecke Questionnaire of Habitual Physical *** primary outcome was hospital length of *** secondary outcomes were mortality,admission to the intensive care unit(ICU),and mechanical ventilation ***:The median hospital length of stay was 7.0§4.0 days,median§IQR;3.3%of patients died,13.8%were admitted to the ICU,and 8.6%required mechanical *** linear regression models showed that PA indices were not associated with hospital length of stay(work index:b=-0.57(95%confidence interval(95%CI):-1.80 to 0.65),p=0.355;sport index:b=0.43(95%CI:-0.94 to 1.80),p=0.536;leisure-time index:b=1.18(95%CI:-0.22 to 2.59),p=0.099;and total activity index:b=0.20(95%CI:-0.48 to 0.87),p=0.563).None of the PA indices were associated with mortality,admission to the ICU,or mechanical ventilation requirement(all p>0.050).Conclusion:Among hospitalized patients with COVID-19,PA did not independently associate with hospital length of stay or any other clinically relevant *** findings should be interpreted as meaning that,among already hospitalized patients with more severe forms of COVID-19,being active is a potential protective factor likely outweighed by a cluster of comorbidities(e.

关键词： Hospital length of stay Lifestyle Physical inactivity Prognosis SARS-CoV-2

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