Cambios en la respuesta urinaria tras la práctica del fútbol

The objective of this study was to evaluate the chemical parameters and urinary sediment changes before and after a soccer game. Seventeen players were selected from a selective universitary men´s soccer team (age 21,8 ± 1,38 years, weight 73,2 ± 11,8 kg, height 1,71 ± 0,07 m and BMI 24,7 ± 2.3 kg/m2). Chemical parameters of the urine (specific gravity, pH, leukocytes, nitrite, proteins, glucose, bodies ketones, urobilinogene, bilirubin and erythrocytes) and sediment (leukocytes, erythrocytes, crystals, epithelial cells, bacteria, casts, and mucine filaments) were determined. We found a significant increase of specific gravity before and after of competition (1,019 ± 0.005 vs 1,025 ± 0.004; p= 0,0001), pH (6,0 ± 0,91 vs 5,35 ± 0,60; p= 0,008) urinary and in presence of bilirubin (0% vs 41,2%; p= 0,01). In urinary sediment was found a significant rise in the presence of casts (0% vs 29,4%; p= 0,04) and mucin filaments (11,7% vs 64,7% p= 0,004). Although some changes were found in urinary parameters, these chances may have been influenced by an increase in renal reabsortion of water.El objetivo del presente estudio fue evaluar los cambios químicos y del sedimento urinario en un selectivo universitario antes y después de una competición de fútbol asociación. Para ello, se seleccionaron diecisiete jugadores de un selectivo universitario de fútbol varonil (edad 21,8 ± 1,38 años, peso 73,2 ± 11,8 kg, talla 1,71 ± 0,07 m e IMC 24,7± 2,3 kg/m2). A quienes se les determinaron los parámetros químicos de la orina (gravedad específica, pH, leucocitos, nitritos, proteína, glucosa, cetonas, urobilinógeno, bilirrubina y eritrocitos) y del sedimento urinario (leucocitos, eritrocitos, cristales, células epiteliales, bacterias, cilindros y filamento de mucina). Se encontró un aumento significativo en la gravedad específica al comparar el antes vs después de la competición (1,019 ± 0.005 vs 1,025 ± 0.004; p= 0,0001), el pH (6,0 ± 0,91 vs 5,35 ± 0,60; p= 0,008) y en la presencia de bilirrubina (0% vs 41,2%; p= 0,01). En el sedimento urinario se observó un aumento en la presencia de cilindros (0% vs 29,4%; p= 0,04) y de filamento de mucina (11,7% vs 64,7% p= 0,004). Aunque se encontraron cambios en algunos parámetros urinarios, estos cambios pudieron haber estado influenciados por un aumento en la reabsorción renal de líquidos

Changes in urinary response in the soccer practice

The objective of this study was to evaluate the chemical parameters and urinary sediment changes before and after a soccer game. Seventeen players were selected from a selective universitary men's soccer team (age 21,8 ± 1,38 years, weight 73,2 ± 11,8 kg, height 1,71 ± 0,07 m and BMI 24,7 ± 2.3 kg/m2). Chemical parameters of the urine (specific gravity, pH, leukocytes, nitrite, proteins, glucose, bodies ketones, urobilinogene, bilirubin and erythrocytes) and sediment (leukocytes, erythrocytes, crystals, epithelial cells, bacteria, casts, and mucine filaments) were determined. We found a significant increase of specific gravity before and after of competition (1,019 ± 0.005 vs 1,025 ± 0.004; p= 0,0001), pH (6,0 ± 0,91 vs 5,35 ± 0,60; p= 0,008) urinary and in presence of bilirubin (0% vs 41,2%; p= 0,01). In urinary sediment was found a significant rise in the presence of casts (0% vs 29,4%; p= 0,04) and mucin filaments (11,7% vs 64,7% p= 0,004). Although some changes were found in urinary parameters, these chances may have been influenced by an increase in renal reabsortion of water. Key words: Soccer, urinary parameters, bilirubin, mucin, cast

Changes in urinary response in the soccer practice

The objective of this study was to evaluate the chemical parameters and urinary sediment changes before and after a soccer game. Seventeen players were selected from a selective universitary men's soccer team (age 21,8 ± 1,38 years, weight 73,2 ± 11,8 kg, height 1,71 ± 0,07 m and BMI 24,7 ± 2.3 kg/m2). Chemical parameters of the urine (specific gravity, pH, leukocytes, nitrite, proteins, glucose, bodies ketones, urobilinogene, bilirubin and erythrocytes) and sediment (leukocytes, erythrocytes, crystals, epithelial cells, bacteria, casts, and mucine filaments) were determined. We found a significant increase of specific gravity before and after of competition (1,019 ± 0.005 vs 1,025 ± 0.004; p= 0,0001), pH (6,0 ± 0,91 vs 5,35 ± 0,60; p= 0,008) urinary and in presence of bilirubin (0% vs 41,2%; p= 0,01). In urinary sediment was found a significant rise in the presence of casts (0% vs 29,4%; p= 0,04) and mucin filaments (11,7% vs 64,7% p= 0,004). Although some changes were found in urinary parameters, these chances may have been influenced by an increase in renal reabsortion of water. Key words: Soccer, urinary parameters, bilirubin, mucin, cast

Skewness and kurtosis of mean transverse momentum fluctuations at the LHC energies

The first measurements of skewness and kurtosis of mean transverse momentum (〈pT〉) fluctuations are reported in Pb–Pb collisions at sNN = 5.02 TeV, Xe–Xe collisions at sNN = 5.44 TeV and pp collisions at s=5.02 TeV using the ALICE detector. The measurements are carried out as a function of system size 〈dNch/dη〉|η|<0.51/3, using charged particles with transverse momentum (pT) and pseudorapidity (η), in the range 0.2<pT<3.0 GeV/c and |η|<0.8, respectively. In Pb–Pb and Xe–Xe collisions, positive skewness is observed in the fluctuations of 〈pT〉 for all centralities, which is significantly larger than what would be expected in the scenario of independent particle emission. This positive skewness is considered a crucial consequence of the hydrodynamic evolution of the hot and dense nuclear matter created in heavy-ion collisions. Furthermore, similar observations of positive skewness for minimum bias pp collisions are also reported here. Kurtosis of 〈pT〉 fluctuations is found to be in good agreement with the kurtosis of Gaussian distribution, for most central Pb–Pb collisions. Hydrodynamic model calculations with MUSIC using Monte Carlo Glauber initial conditions are able to explain the measurements of both skewness and kurtosis qualitatively from semicentral to central collisions in Pb–Pb system. Color reconnection mechanism in PYTHIA8 model seems to play a pivotal role in capturing the qualitative behavior of the same measurements in pp collisions

System-size dependence of the hadronic rescattering effect at energies available at the CERN Large Hadron Collider

International audienceThe first measurements of K*(892)0 resonance production as a function of charged-particle multiplicity in Xe-Xe collisions at sNN=5.44 TeV and pp collisions ats=5.02 TeV using the ALICE detector are presented. The resonance is reconstructed at midrapidity (|y| &lt; 0.5) using the hadronic decay channel K*0 →K±π∓. Measurements of transverse-momentum integrated yield, mean transverse-momentum, nuclear modification factor of K*0, and yield ratios of resonance to stable hadron (K*0/K) are compared across different collision systems (pp, p-Pb, Xe-Xe, and Pb-Pb) at similar collision energies to investigate how the production of K*0 resonances depends on the size of the system formed in these collisions. The hadronic rescattering effect is found to be independent of the size of colliding systems and mainly driven by the produced charged-particle multiplicity, which is a proxy of the volume of produced matter at the chemical freeze-out. In addition, the production yields of K*0 in Xe-Xe collisions are utilized to constrain the dependence of the kinetic freeze-out temperature on the system size using the hadron resonance gas–partial chemical equilibrium model

Pseudorapidity dependence of anisotropic flow and its decorrelations using long-range multiparticle correlations in Pb–Pb and Xe–Xe collisions

The pseudorapidity dependence of elliptic (v2), triangular (v3), and quadrangular (v4) flow coefficients of charged particles measured in Pb–Pb collisions at a centre-of-mass energy per nucleon pair of sNN=5.02TeV and in Xe–Xe collisions at sNN=5.44TeV with ALICE at the LHC are presented. The measurements are performed in the pseudorapidity range −3.5<η<5 for various centrality intervals using two- and multi-particle cumulants with the subevent method. The flow probability density function (p.d.f.) is studied with the ratio of flow coefficient v2 calculated with four- and two-particle cumulant, and suggests that the variance of flow p.d.f. is independent of pseudorapidity. The decorrelation of the flow vector in the longitudinal direction is probed using two-particle correlations. The results measured with respect to different reference regions in pseudorapidity exhibit differences, argued to be a result of saturating decorrelation effect above a certain pseudorapidity separation, in contrast to previous publications which assign this observation to non-flow effects. The results are compared to 3+1 dimensional hydrodynamic and the AMPT transport model calculations. Neither of the models is able to simultaneously describe the pseudorapidity dependence of measurements of anisotropic flow and its fluctuations. The results presented in this work highlight shortcomings in our current understanding of initial conditions and subsequent system expansion in the longitudinal direction. Therefore, they provide input for its improvement

Measurement of the fraction of jet longitudinal momentum carried by <math display="inline"><msubsup><mi mathvariant="normal">Λ</mi><mi>c</mi><mo>+</mo></msubsup></math> baryons in <math display="inline"><mi>p</mi><mi>p</mi></math> collisions

International audienceRecent measurements of charm-baryon production in hadronic collisions have questioned the universality of charm-quark fragmentation across different collision systems. In this work the fragmentation of charm quarks into charm baryons is probed, by presenting the first measurement of the longitudinal jet momentum fraction carried by Λc+ baryons, z∥ch, in hadronic collisions. The results are obtained in proton-proton (pp) collisions at s=13  TeV at the LHC, with Λc+ baryons and charged (track-based) jets reconstructed in the transverse momentum intervals of 3≤pTΛc+&lt;15  GeV/c and 7≤pTjet ch&lt;15  GeV/c, respectively. The z∥ch distribution is compared to a measurement of D0-tagged charged jets in pp collisions as well as to pythia 8 simulations. The data hints that the fragmentation of charm quarks into charm baryons is softer with respect to charm mesons, in the measured kinematic interval, as predicted by hadronization models which include color correlations beyond leading-color in the string formation