670 research outputs found
Recent status of the understanding of neutrino-nucleus cross section
In this work we have presented current understanding of
neutrino-nucleon/nucleus cross sections in the few GeV energy region relevant
for a precise determination of neutrino oscillation parameters and CP violation
in the leptonic sector. In this energy region various processes like
quasielastic and inelastic production of single and multipion production,
coherent pion production, kaon, eta, hyperon production, associated particle
production as well as deep inelastic scattering processes contribute to the
neutrino event rates.Comment: 9-Pages, 4-figures, Talk given at DAE-HEP Symposium held at Delhi
University, 12-16 December, 201
Electromagnetic and Weak Nuclear Structure Functions in the Intermediate Region of
We have studied nuclear structure functions and
for electromagnetic and weak processes in the region of . The nuclear medium effects arising due to Fermi motion,
binding energy, nucleon correlations, mesonic contributions and shadowing
effects are taken into account using a many body field theoretical approach.
The calculations are performed in a local density approximation using a
relativistic nucleon spectral function. The results are compared with the
available experimental data. Implications of nuclear medium effects on the
validity of Callan-Gross relation are also discussed.Comment: Published in Journal of the Physical Society of Japan (NuInt-2015
Nucleon and nuclear structure functions with non-perturbative and higher order perturbative QCD effects
We have studied the nucleon structure functions ,
by including contributions due to the higher order perturbative QCD effect up
to NNLO and the non-perturbative effects due to the kinematical and dynamical
higher twist (HT) effects. The numerical results for are
obtained using Martin, Motylinski, Harland-Lang, Thorne (MMHT) 2014 NLO and
NNLO nucleon parton distribution functions (PDFs). The dynamical HT correction
has been included following the renormalon approach as well as the
phenomenological approach and the kinematical HT effect is incorporated using
the works of Schienbein et al. These nucleon structure functions have been used
as an input to calculate the nuclear structure functions .
In a nucleus, the nuclear corrections arise because of the Fermi motion,
binding energy, nucleon correlations, mesonic contribution, shadowing and
antishadowing effects. These nuclear corrections are taken into account in the
numerical calculations to obtain the nuclear structure functions , for the various nuclear targets like , , ,
, , and which are of experimental
interest.
The effect of isoscalarity correction for nonisoscalar nuclear targets has
also been studied.
The results for the are compared with nCTEQ nuclear
PDFs parameterization as well as with the experimental results from JLab, SLAC
and NMC in the kinematic region of for several nuclei.Comment: arXiv admin note: text overlap with arXiv:1705.0990
BLOOD SERUM TESTOSTERONE LEVEL AND ITS RELATIONSHIP WITH SCROTAL CIRCUMFERENCE AND SEMEN CHARACTERISTICS IN NILI-RAVI BUFFALO BULLS
This study was aimed at determining the blood serum testosterone level and its relationship with scrotal circumference and physical characteristics of semen in Nili-Ravi buffalo bulls. Semen samples were collected weekly from three buffalo bulls of 14 years age for 12 weeks and were evaluated for physical characteristics i.e. ejaculatory volume, sperm motility, sperm concentration, pH and sperm abnormalities. Jugular blood samples were collected from each bull at weekly intervals and analyzed for serum testosterorse concentrations. Mean (+ SE) blood serum testosterone level (ng/ml), scrotal circumference (cm), semen volume (ml), progressive sperm motility (%), sperm concentration (106/µl), semen pH and total sperm abnormalities (%) observed were 0.69 ± 0.12, 34.6 ± 0.9, 3.59 ± 0.41, 51.53 ± 2.23, 0.99 ± 0.07, 7.01 ± 0.08 and 11.67 ± 0.90, respectively. Positive correlations between testosterone level and scrotal circumference (r=0.414) and ejaculatory volume (r=0.348) were observed. However, no correlation of testosterone level with sperm motility (r=0.145), sperm concentration (r=0.264), semen pH (r=-0.208) and total sperm abnormalities (r=-0.242) was found. Similary, ejaculatory volume did not show any correlation with sperm motility percentage (r=0.115), sperm concentration (r=0.045), semen pH (r=-0.015) and total sperm abnormalities (r=-0.135). Sperm motility percentage had positive correlation with sperm concentration (r=0.347) and negative correlation with semen pH (r=-0.670). Sperm concentration was negatively correlated with semen pH (r=-0.501). It was concluded that in 14 years old buffalo bulls the level of serum testosterone and scrotal circumference and ejaculatory volume were positively correlated. The other semen quality parameters including sperm motility, sperm concentration, semen pH and sperm abnormalities were not related with serum testosterone level
Cystic artery pseudo-aneurysm: a complication of xanthogranulomatous cholecystitis
A 54-year-old man presented for radiology with pain and a feeling of fullness in the upper abdomen and an epigastric mass. Ultrasound revealed a large cystic mass with internal echoes, lying posterior and inferior to left lobe of the liver. The gallbladder was thick-walled and contracted, and contained a calculus and echogenic sludge. A cystic structure that produced swirling flow signals on colour Doppler was demonstrated within the gallbladder. The CT scan showed a thickened gallbladder with adjacent inflammation and a 2-cm pseudo-aneurysm in its wall. High-density material was present in the gallbladder lumen, in the extra-hepatic bile ducts and around the gastrohepatic ligament. A thick haemorrhagic pus, from which Escherichia coli was cultured, was drained from the gastrohepatic collection. An elective coeliac angiogram demonstrated a solitary pseudo-aneurysm of the medial branch of the cystic artery. Selective catheterisation of this artery with a micro-catheter enabled complete exclusion of the pseudo-aneurysm by a single micro-coil. Histological examination of the gallbladder, which was ultimately removed at open cholecystectomy, demonstrated xanthogranulomatous cholecystitis
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