Study of light nuclei and strange baryon production in proton-proton and Pb-Pb collisions with ALICE

L'abstract è presente nell'allegato / the abstract is in the attachmen

USO DO ULTRASSOM INTRAVASCULAR EM PACIENTES COM ESTENOSE CORONARIANA

Introdução: O uso da ultrassonografia intravascular (USIV) é um metodo recomendado para orientação da decisão de revascularização nos pacientes que apresentam estenose coronariana. A USIV fornece imagens tomográficas de modo contínuo, possibilitando o detalhamento dos vasos. Objetivo: Analisar o uso do ultrassom intravascular nos pacientes com estenose de coronárias. Metodologia: Trata-se de uma revisão integrativa dos últimos 3 anos, do período de 2022 a 2025. O site utilizado para a pesquisa foi a Biblioteca Virtual em Saúde, com as bases de dados da Medline. Os descritores em ciências da saúde (DECS) que foram utilizados:  "Ultrassonografia Intravascular" "Estenose Coronária". Foram encontrados 32 artigos, sendo eles analisados conforme os critérios de inclusão e exclusão. Os critérios de inclusão foram artigos que se relacionavam à proposta estudada e que foram disponibilizados na íntegra. Estudos observacionais, ensaios clínicos, relatos de caso e artigos de revisão que atendiam a esses critérios foram selecionados e analisados. Resultados e Discussão: O USIV fornece informações do grau de estenose com precisão, sendo um método cada vez mais utilizado no tratamento da síndrome coronariana aguda (SCA). Esse método pode ser utilizado não só como tratamento, como também ferramenta diagnóstico para avaliar lesões coronarianas ambíguas, onde se observa graus de estenose moderados sem isquemia nos testes não invasivos. Observa-se uma associação com a redução da mortalidade na SCA. Nota-se também melhores resultados clínicos na intervenção coronariana percutânea ICP. Conclusão: Nessa perspectiva, evidencia-se as potenciais vantagens que o uso da USIV possibilita no diagnóstico e tratamento

AVALIAÇÃO DA INTERFERÊNCIA DAS DIFERENTES FORMULAÇÕES E DOSAGENS DE COBALTO E MOLIBDÊNIO NA QUALIDADE FISIOLÓGICA DAS SEMENTES DE SOJA

A eficácia do processo de fixação biológica de nitrogênio, bem como o seu processo metabólico, pode ser seriamente Prejudicada pela deficiência de cobalto e molibdênio. Diante do exposto, o objetivo do presente trabalho foi avaliar o potencial fisiológico das sementes da soja, em resposta a diferentes formulações e dosagens de cobalto (Co) e molibdênio (Mo) aplicadas via tratamento de sementes de soja. O experimento foi conduzido no delineamento inteiramente casualizado, com quatro ou cinco repetições, no laboratório e em casa de vegetação do Núcleo de Pesquisa Aplicada à Agricultura (NUPAGRI) pertencente ao Centro de Ciências Agrárias da Universidade Estadual de Maringá (UEM). Os tratamentos com diferentes formulações e doses de Co e Mo foram assim constituídos: 1 – Testemunha (0 mL ha-1); 2 – CoMo® (100 mL ha-1); 3 – CoMo P10® (100 mL ha-1 ); 4 – CoMo Platinum® (100 mL ha-1); 5 - CoMo® (150 mL ha-1); 6 – CoMo P10® (150 mL ha-1) e 7 – CoMo Platinum® (150 mL ha-1). As sementes foram avaliadas por meio dos testes de germinação (primeira contagem e contagem final), comprimento das plântulas, biomassa seca das raízes e da parte aérea das plântulas, índice de velocidade de emergência e emergência final em substrato de areia. Os resultados obtidos indicaram que as variáveis comprimento das plântulas, contagem final de germinação e biomassa seca da parte aérea não apresentaram diferença significativa entre os produtos e doses avaliadas de Co e Mo. Porém, para a variável primeira contagem de germinação, o tratamento 6 (CoMo P10®, na dose de 150 mL ha-1) foi o que promoveu o maior vigor nas sementes de soja, diferenciando das variáveis índice de velocidade de emergência e biomassa seca das raízes, em que o tratamento 5 (CoMo®, na dose de 150 mL ha-1) foi considerado o mais efetivo

Global Roadkill Data: a dataset on terrestrial vertebrate mortality caused by collision with vehicles

Roadkill is widely recognized as one of the primary negative effects of roads on many wildlife species and also has socioeconomic impacts when they result in accidents. A comprehensive dataset of roadkill locations is essential to evaluate the factors contributing to roadkill risk and to enhance our comprehension of its impact on wildlife populations and socioeconomic dimensions. We undertook a compilation of roadkill records, encompassing both published and unpublished data gathered from road surveys or opportunistic sources. GLOBAL ROADKILL DATA includes 208,570 roadkill records of terrestrial vertebrates from 54 countries across six continents, encompassing data collected between 1971 and 2024. This dataset serves to minimise the collection of redundant data and acts as a valuable resource for local and macro scale analysis regarding rates of roadkill, road- and landscape-related features associated with risk of roadkill, vulnerability of species to road traffic, and populations at risk of local extinction. The objective of this dataset is to promote scientific progress in infrastructure ecology and terrestrial vertebrate conservation while limiting the socio-economic costs.publishedVersio

Measurement of beauty production via non-prompt charm hadrons in p–Pb collisions at sNN = 5.02 TeV

The production cross sections of D0, D+, and Λc+ hadrons originating from beauty-hadron decays (i.e. non-prompt) were measured for the first time at midrapidity in proton–lead (p–Pb) collisions at the center-of-mass energy per nucleon pair of sNN = 5.02 TeV. Nuclear modification factors (RpPb) of non-prompt D0, D+, and Λc+ are calculated as a function of the transverse momentum (pT) to investigate the modification of the momentum spectra measured in p–Pb collisions with respect to those measured in proton–proton (pp) collisions at the same energy. The RpPb measurements are compatible with unity and with the measurements in the prompt charm sector, and do not show a significant pT dependence. The pT-integrated cross sections and pT-integrated RpPb of non-prompt D0 and D+ mesons are also computed by extrapolating the visible cross sections down to pT = 0. The non-prompt D-meson RpPb integrated over pT is compatible with unity and with model calculations implementing modification of the parton distribution functions of nucleons bound in nuclei with respect to free nucleons. The non-prompt Λc+/D0 and D+/D0 production ratios are computed to investigate hadronisation mechanisms of beauty quarks into mesons and baryons. The measured ratios as a function of pT display a similar trend to that measured for charm hadrons in the same collision system

Medium-induced modification of groomed and ungroomed jet mass and angularities in Pb–Pb collisions at s NN = 5.02 Image 1

The ALICE Collaboration presents a new suite of jet substructure measurements in Pb–Pb and pp collisions at a center-of-mass energy per nucleon pair sNN=5.02 [Figure presented]. These measurements provide access to the internal structure of jets via the momentum and angle of their constituents, probing how the quark–gluon plasma modifies jets, an effect known as jet quenching. Jet grooming additionally removes soft wide-angle radiation to enhance perturbative accuracy and reduce experimental uncertainties. We report the groomed and ungroomed jet mass mjet and jet angularities λα κ using κ=1 and α>0. Charged-particle jets are reconstructed at midrapidity using the anti-kT algorithm with resolution parameter R=0.2. A narrowing of the jet mass and angularity distributions in Pb–Pb collisions with respect to pp is observed and is enhanced for groomed results, confirming modification of the jet core. By using consistent jet definitions and kinematic cuts between the mass and angularities for the first time, previous inconsistencies in the interpretation of quenching measurements are resolved, rectifying a hurdle for understanding how jet quenching arises from first principles and highlighting the importance of a well-controlled baseline. These results are compared with a variety of theoretical models of jet quenching, providing constraints on jet energy-loss mechanisms in the quark–gluon plasma

Multiplicity dependence of ϒ production at forward rapidity in pp collisions at s = 13 TeV

The measurement of ϒ(1S), ϒ(2S), and ϒ(3S) yields as a function of the charged-particle multiplicity density, dNch/dη, using the ALICE experiment at the LHC, is reported in pp collisions at s= 13 TeV. The ϒ meson yields are measured at forward rapidity (2.

Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV

The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV down to transverse momentum (pT) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v2 in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8σ at low pT, and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v2 coefficient is also found independent of pT within uncertainties. Comparisons with the inclusive charged-particle v2 and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v2 in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models

Measurement of the production and elliptic flow of (anti)nuclei in Xe-Xe collisions at sNN=5.44 TeV

Measurements of (anti)deuteron and (anti)He3 production in the rapidity range |y|<0.5 as a function of the transverse momentum and event multiplicity in Xe-Xe collisions at a center-of-mass energy per nucleon-nucleon pair of sNN=5.44 TeV are presented. The coalescence parameters B2 and B3 are measured as a function of the transverse momentum per nucleon. The ratios between (anti)deuteron and (anti)He3 yields and those of (anti)protons and pions are reported as a function of the mean charged-particle multiplicity density and compared with two implementations of the statistical hadronization model and with coalescence predictions. The elliptic flow of (anti)deuterons is measured for the first time in Xe-Xe collisions and shows features similar to those already observed in Pb-Pb collisions, i.e., the mass ordering at low transverse momentum and the meson-baryon grouping at intermediate transverse momentum. The production of nuclei is particularly sensitive to the chemical freeze-out temperature of the system created in the collision, which is extracted from a grand-canonical-ensemble-based thermal fit, performed for the first time including light nuclei along with light-flavor hadrons in Xe-Xe collisions. The extracted chemical freeze-out temperature Tchem=(154.2±1.1) MeV in Xe-Xe collisions is similar to that observed in Pb-Pb collisions and close to the crossover temperature predicted by lattice quantum chromodynamics calculations

Charm-quark fragmentation fractions and production cross section at midrapidity in pp collisions at the LHC

Recent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, Ds+, Λc+, and Ξc0, are used to evaluate the charm fragmentation fractions and production cross section per unit of rapidity at midrapidity (|y|<0.5), in pp collisions at s=5.02 TeV at the LHC. The latter is dσcc¯/dy||y|<0.5=1165±44(stat)-101+134(syst) μb. These measurements were obtained for the first time in hadronic collisions at the LHC, including the charm baryon states, recently measured by ALICE at midrapidity. The charm fragmentation fractions differ significantly from the values measured in e+e- and ep collisions, providing evidence of the dependence of the parton-to-hadron fragmentation fractions on the collision system, indicating that the assumption of their universality is not supported by the measured cross sections. An increase of a factor of about 3.3 for the fragmentation fraction for the Λc+ with a significance of 5σ between the values obtained in pp collisions and those obtained in e+e- (ep) collisions is reported. The fragmentation fraction for the Ξc0 was obtained for the first time in any collision system. The measured fragmentation fractions were used to update the cc¯ cross sections per unit of rapidity at |y|<0.5 at s=2.76 and 7 TeV, which are about 40% higher than the previously published results. The data were compared with perturbative-QCD calculations and lie at the upper edge of the theoretical bands