336 research outputs found
Sonografski prikaz dimenzija bubrega u bolesnika s esencijalnom hipertenzijom u sveučilišnoj bolnici Abubakar Tafawa Balewa u gradu Bauchi u Nigeriji
Introduction: Hypertension is one of the commonest non-communicable diseases worldwide; it is the second most common cause of end-stage renal disease.
Objective: To evaluate the renal dimensions and volume of essential hypertension patients in Abubakar Tafawa Balewa University Teaching Hospital, Bauchi and to compare the dimensions with that of apparently healthy volunteers.
Materials and Methods: A total of two hundred and eleven individuals (comprising 121 females and 90 males) with essential hypertension attending an outpatient clinic in Abubakar Tafawa Balewa University Teaching Hospital Bauchi, and an equal number of healthy volunteers (comprising of 172 females and 49 males) were studied as controls. Both the healthy volunteers and the Hypertensive patients’ renal length, renal width, antero-posterior diameter, and parenchymal thickness were assessed. Statistical Package for Social Sciences (SPSS version 20.0) was used for data analysis.
Results: Study show the mean renal length for hypertensive patients to be 9.1 ± 0.79 cm and 9.1 ± 0.73 cm, the mean renal width of 3.5 ± 0.48 cm and 3.8 ± 0.68 cm, and mean renal volume of 87.22 ± 19.58 cm3 and 95.08 ± 22.93 cm3 for the right and left kidneys respectively. Results equally show statistically significant difference in anteroposterior diameter (p<0.05), parenchymal thickness (p<0.05) and renal volume (p<0.05) between the hypertensive group and the volunteer group for both right and left kidneys.
Conclusion: This study has established baseline renal dimensions for hypertensive in our population (Bauchi Metropolis). The hypertensive subjects showed a decrease in renal anteroposterior diameter, parenchymal thickness and volume compared to control group.Uvod: Hipertenzija je jedna od najčešćih nezaraznih bolesti u svijetu; drugi je najčešći uzrok završnog stadija bubrežne bolesti.
Cilj: Procijeniti dimenzije bubrega i bubrežni volumen kod hipertenzivnih bolesnika u Sveučilišnoj bolnici Abubakar Tafawa Balewa u gradu Bauchi i usporediti ih s dimenzijama kod naizgled zdravih ispitanika koji su se dobrovoljno javili za sudjelovanje u istraživanju.
Materijali i metode: Uzorak se sastojao od dvjesto jedanaest ispitanika (121 žena i 90 muškaraca) koji boluju od esencijalne hipertenzije i na ambulantnom su liječenju u Sveučilišnoj bolnici Abubakar Tafawa Balewa u gradu Bauchi i jednakog broja zdravih ispitanika (172 žene i 49 muškaraca), koji su bili kontrolna skupina. Proučavana je duljina i širina bubrega, anteroposteriorni promjer i debljina parenhima kod ispitanika s hipertenzijom i kod zdravih ispitanika. Za analizu podataka primijenjen je statistički paket za društvene znanosti (SPSS verzija 20.0).
Rezultati: Studija pokazuje da je prosječna dužina bubrega kod hipertenzivnih bolesnika 9,1 ± 0,79 cm i 9,1 ± 0,73 cm, prosječna bubrežna širina 3,5 ± 0,48 cm i 3,8 ± 0,68 cm, a prosječni bubrežni volumen 87,22 ± 19,58 cm3 i 95,08 ± 22,93 cm3 za desni i lijevi bubreg pojedinačno. Rezultati također pokazuju statistički značajnu razliku u anteroposteriornom promjeru (p < 0,05), debljini parenhima (p < 0,05) i bubrežnom volumenu (p < 0,05) između hipertenzivne skupine i kontrolne skupine za desni i lijevi bubreg.
Zaključak: Ovom su studijom utvrđene osnovne bubrežne dimenzije kod hipertenzivnih bolesnika u populaciji grada Bauchi, glavnog grada Savezne države Bauchi u Nigeriji. Kod ispitanika koji boluju od hipertenzije ustanovljeno je smanjenje anteroposteriornog promjera bubrega, debljine parenhima i bubrežnog volumena u usporedbi s kontrolnom skupinom
Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at TeV
The elliptic, , triangular, , and quadrangular, , azimuthal
anisotropic flow coefficients are measured for unidentified charged particles,
pions and (anti-)protons in Pb-Pb collisions at TeV
with the ALICE detector at the Large Hadron Collider. Results obtained with the
event plane and four-particle cumulant methods are reported for the
pseudo-rapidity range at different collision centralities and as a
function of transverse momentum, , out to GeV/.
The observed non-zero elliptic and triangular flow depends only weakly on
transverse momentum for GeV/. The small dependence
of the difference between elliptic flow results obtained from the event plane
and four-particle cumulant methods suggests a common origin of flow
fluctuations up to GeV/. The magnitude of the (anti-)proton
elliptic and triangular flow is larger than that of pions out to at least
GeV/ indicating that the particle type dependence persists out
to high .Comment: 16 pages, 5 captioned figures, authors from page 11, published
version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/186
Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at TeV
The inclusive transverse momentum () distributions of primary
charged particles are measured in the pseudo-rapidity range as a
function of event centrality in Pb-Pb collisions at
TeV with ALICE at the LHC. The data are presented in the range
GeV/ for nine centrality intervals from 70-80% to 0-5%.
The Pb-Pb spectra are presented in terms of the nuclear modification factor
using a pp reference spectrum measured at the same collision
energy. We observe that the suppression of high- particles strongly
depends on event centrality. In central collisions (0-5%) the yield is most
suppressed with at -7 GeV/. Above
GeV/, there is a significant rise in the nuclear modification
factor, which reaches for GeV/. In
peripheral collisions (70-80%), the suppression is weaker with almost independently of . The measured nuclear
modification factors are compared to other measurements and model calculations.Comment: 17 pages, 4 captioned figures, 2 tables, authors from page 12,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/284
Measurement of charm production at central rapidity in proton-proton collisions at TeV
The -differential production cross sections of the prompt (B
feed-down subtracted) charmed mesons D, D, and D in the rapidity
range , and for transverse momentum GeV/, were
measured in proton-proton collisions at TeV with the ALICE
detector at the Large Hadron Collider. The analysis exploited the hadronic
decays DK, DK, DD, and their charge conjugates, and was performed on a
nb event sample collected in 2011 with a
minimum-bias trigger. The total charm production cross section at TeV and at 7 TeV was evaluated by extrapolating to the full phase space
the -differential production cross sections at TeV
and our previous measurements at TeV. The results were compared
to existing measurements and to perturbative-QCD calculations. The fraction of
cdbar D mesons produced in a vector state was also determined.Comment: 20 pages, 5 captioned figures, 4 tables, authors from page 15,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/307
Particle-yield modification in jet-like azimuthal di-hadron correlations in Pb-Pb collisions at = 2.76 TeV
The yield of charged particles associated with high- trigger
particles ( GeV/) is measured with the ALICE detector in
Pb-Pb collisions at = 2.76 TeV relative to proton-proton
collisions at the same energy. The conditional per-trigger yields are extracted
from the narrow jet-like correlation peaks in azimuthal di-hadron correlations.
In the 5% most central collisions, we observe that the yield of associated
charged particles with transverse momenta GeV/ on the
away-side drops to about 60% of that observed in pp collisions, while on the
near-side a moderate enhancement of 20-30% is found.Comment: 15 pages, 2 captioned figures, 1 table, authors from page 10,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/350
ϒ production in p–Pb collisions at √sNN=8.16 TeV
ϒ production in p–Pb interactions is studied at the centre-of-mass energy per nucleon–nucleon collision √sNN = 8.16 TeV with the ALICE detector at the CERN LHC. The measurement is performed reconstructing bottomonium resonances via their dimuon decay channel, in the centre-of-mass rapidity intervals 2.03 < ycms < 3.53 and −4.46 < ycms < −2.96, down to zero transverse momentum. In this work, results on the ϒ(1S) production cross section as a function of rapidity and transverse momentum are presented. The corresponding nuclear modification factor shows a suppression of the ϒ(1S) yields with respect to pp collisions, both at forward and backward rapidity. This suppression is stronger in the low transverse momentum region and shows no significant dependence on the centrality of the interactions. Furthermore, the ϒ(2S) nuclear modification factor is evaluated, suggesting a suppression similar to that of the ϒ(1S). A first measurement of the ϒ(3S) has also been performed. Finally, results are compared with previous ALICE measurements in p–Pb collisions at √sNN = 5.02 TeV and with theoretical calculations.publishedVersio
Transverse momentum spectra of charged particles in proton-proton collisions at GeV with ALICE at the LHC
The inclusive charged particle transverse momentum distribution is measured
in proton-proton collisions at GeV at the LHC using the ALICE
detector. The measurement is performed in the central pseudorapidity region
over the transverse momentum range GeV/.
The correlation between transverse momentum and particle multiplicity is also
studied. Results are presented for inelastic (INEL) and non-single-diffractive
(NSD) events. The average transverse momentum for is (stat.) (syst.) GeV/ and
\left_{\rm NSD}=0.489\pm0.001 (stat.) (syst.)
GeV/, respectively. The data exhibit a slightly larger than measurements in wider pseudorapidity intervals. The results are
compared to simulations with the Monte Carlo event generators PYTHIA and
PHOJET.Comment: 20 pages, 8 figures, 2 tables, published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/390
Inclusive J/psi production in pp collisions at sqrt(s) = 2.76 TeV
The ALICE Collaboration has measured inclusive J/psi production in pp
collisions at a center of mass energy sqrt(s)=2.76 TeV at the LHC. The results
presented in this Letter refer to the rapidity ranges |y|<0.9 and 2.5<y<4 and
have been obtained by measuring the electron and muon pair decay channels,
respectively. The integrated luminosities for the two channels are L^e_int=1.1
nb^-1 and L^mu_int=19.9 nb^-1, and the corresponding signal statistics are
N_J/psi^e+e-=59 +/- 14 and N_J/psi^mu+mu-=1364 +/- 53. We present
dsigma_J/psi/dy for the two rapidity regions under study and, for the forward-y
range, d^2sigma_J/psi/dydp_t in the transverse momentum domain 0<p_t<8 GeV/c.
The results are compared with previously published results at sqrt(s)=7 TeV and
with theoretical calculations.Comment: 7 figures, 3 tables, accepted for publication in Phys. Lett.
(Anti-)deuteron production in pp collisions at 1as=13TeV
The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of (anti-)deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at s=13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (d Nch/ d \u3b7 3c 26) as measured in p\u2013Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p\u2013Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM)
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