914 research outputs found
A Comparative Study of Lipid Profile among Smokers and Non-Smokers
BACKGROUND & OBJECTIVES:
A prospective study was carried out to find the variations in lipid profile in smokers when compared to non-smokers. To study the alterations in lipid profile in terms of severity of smoking.
MATERIALS AND METHODS:
This study was carried out among 200 patients who attended Government Rajaji Hospital, Madurai for various ailments. The population was divided into 100 non-smokers and 100 smokers. The smokers were further divided into three groups depending on the intensity of smoking. Serum lipid profile was analyzed in all subjects.
RESULTS:
Lipid Profile -
TC : Non-Smokers (Mean ± Std) 161.18±26.77, Smokers (Mean ± Std) 191.96±31.37, P-Value < 0.001.
Lipid Profile -
TG : Non-Smokers (Mean ± Std) 103.58±26.26, Smokers (Mean ± Std) 164.29±28.95 P-Value < 0.001.
Lipid Profile - HDL : Non-Smokers (Mean ± Std) 49.58±8.57, Smokers (Mean ± Std) 44.72±9.96, P-Value = 0.002.
Lipid Profile -
LDL : Non-Smokers (Mean ± Std) 82.34±16.57, Smokers (Mean ± Std 103.08±18.66 < 0.001.
Lipid Profile -
VLDL :
Non-Smokers (Mean ± Std) - 21.69±6.42, Smokers (Mean ± Std) - 29.02±8.98 P-Value < 0.001.
Dyslipidemia was directly proportional to intensity of smoking.
INTERPRETATION AND CONCLUSION:
Increase in total Cholesterol, Triglycerides, LDL & VLDL were found in smokers of all age groups. Whereas HDL values showed inverse relationship. These changes were directly proportional to the severity of smoking. So, Tobacco smoking is associated with dyslipidemia which is atherogenic in nature
Photoneutron reaction cross section measurements on 94Mo and 90Zr relevant to the p-process nucleosynthesis
The photodisintegration cross sections for the 94Mo({\gamma},n) and
90Zr({\gamma},n) reactions have been experimentally investigated with
quasi-monochromatic photon beams at the High Intensity {\gamma}-ray Source
(HI{\gamma}S) facility of the Triangle Universities Nuclear Laboratory (TUNL).
The energy dependence of the photoneutron reaction cross sections was measured
with high precision from the respective neutron emission thresholds up to 13.5
MeV. These measurements contribute to a broader investigation of nuclear
reactions relevant to the understanding of the p-process nucleosynthesis. The
results are compared with the predictions of Hauser-Feshbach statistical model
calculations using two different models for the dipole {\gamma}-ray strength
function. The resulting 94Mo({\gamma},n) and 90Zr({\gamma},n) photoneutron
stellar reaction rates as a function of temperature in the typical range of
interest for the p-process nucleosynthesis show how sensitive the photoneutron
stellar reaction rate can be to the experimental data in the vicinity of the
neutron threshold
Exclusive Measurement of the Nonmesonic Weak Decay of ^{5}_{\Lambda}He Hypernucleus
We performed a coincidence measurement of two nucleons emitted from the
nonmesonic weak decay (NMWD) of ^{5}_{\Lambda}He formed via the
^{6}Li(\pi^+,K^+) reaction. The energies of two nucleons and the pair number
distributions in the opening angle between them were measured. In both np and
nn pairs, we observed a clean back-to-back correlation coming from the two-body
decay of \Lambda p --> n p and \Lambda n --> n n, respectively. The ratio of
the nucleon pair numbers was N_{nn}/N_{np}=0.45 \pm 0.11(stat)\pm 0.03(syst) in
the kinematic region of cos(theta_{NN}) < -0.8. Since each decay mode was
exclusively detected, the measured ratio should be close to the ratio of
\Gamma(\Lambda p --> np)/\Gamma(\Lambda n --> nn).
The ratio is consistent with recent theoretical calculations based on the
heavy meson/direct quark exchange picture.Comment: Submitted to Phys. Rev. lett., 4 pages, 3 figure
Gamma-Ray Spectroscopy of O and N Hypernuclei via the O reaction
he bound-state level structures of the O and
N hypernuclei were studied by -ray spectroscopy using
a germanium detector array (Hyperball) via the O ()
reaction. A level scheme for O was determined from the
observation of three -ray transitions from the doublet of states
(,) at MeV to the ground-state doublet (,). The
N hypernuclei were produced via proton emission from unbound
states in O . Three -rays were observed and the
lifetime of the state in N was measured by the
Doppler shift attenuation method. By comparing the experimental results with
shell-model calculations, the spin-dependence of the interaction is
discussed. In particular, the measured O ground-state doublet
spacing of 26.4 1.6 0.5 keV determines a small but nonzero strength
of the tensor interaction.Comment: 22 pages, 17 figure
Proton asymmetry in non-mesonic weak decay of light hypernuclei
We have obtained the decay asymmetry parameters in non-mesonic weak decay of
polarized Lambda-hypernuclei by measuring the proton asymmetry. The polarized
Lambda-hypernuclei, 5_Lambda-He, 12_Lambda-C, and 11_Lambda-B, were produced in
high statistics via the (pi^+,k^+) reaction at 1.05 GeV/c in the forward
angles. Preliminary analysis shows that the decay asymmetry parameters are very
small for these s-shell and p-shell hypernuclei.Comment: 4pages, 4figures, International Conference on Hypernuclear and
Strange Particle Physics (HYP2003
Measurement of the decay width of He
We have precisely measured decay width of \5LHe and
demonstrated significantly larger - overlap than expected
from the central repulsion - potential, which is derived from
YNG \Lambda$-nucleon interaction.Comment: 4 pages, 3 figure
Fermi surface in BaNiP
We report measurements of the de Haas-van Alphen (dHvA) oscillation and a
band structure calculation for the pnictide superconductor BaNiP, which
is isostructural to BaFeAs, the mother compound of the iron-pnictide
high- superconductor (BaK)FeAs. Six dHvA-frequency
branches with frequencies up to 8 kT were observed, and they are in
excellent agreement with results of the band-structure calculation. The
determined Fermi surface is large, enclosing about one electron and hole per
formula unit, and three-dimensional. This is in contrast to the small
two-dimensional Fermi surface expected for the iron-pnictide high-
superconductors. The mass enhancement is about two.Comment: To appear in J. Phys. Soc. Jpn., Vol. 78, No.
pi^0 decay branching ratios of 5_Lambda-He and 12_Lambda-C hypernuclei
We precisely measured pi^0 branching ratios of 5_Lambda-He and 12_Lambda-C
hypernuclei produced via (pi^+,k^+) reaction. Using these pi^0 branching ratios
with the pi^- branching ratios and the lifetimes, we obtained the pi^0 decay
widths and the non-mesonic weak decay widths at high statistics with the
accuracy of ~5 % (stat) for both hypernuclei.Comment: 4pages, 4figures, International Conference on Hypernuclear and
Strange Particle Physics (HYP2003
Nucleon-nucleon coincidence measurement in the non-mesonic weak decay of 5_Lambda-He and 12_Lambda-C hypernuclei
We have measured both yields of neutron-proton and neutron-neutron pairs
emitted from the non-mesonic weak decay process of 5_Lambda-He and 12_Lambda-C
hypernuclei produced via the (pi^+,K^+) reaction for the first time. We
observed clean back-to-back correlation of the np- and nn-pairs in the
coincidence spectra for both hypernuclei. The ratio of those back-to-back pair
yields, Nnn / Nnp, must be close to the ratio of neutron- and proton-induced
decay widths of the decay, Gn(Lambda n -> nn)/Gp(Lambda p -> np). The obtained
ratios for each hypernuclei support recent calculations based on short-range
interactions.Comment: 4 pages, 1 figure, International Nuclear Physics Conference (INPC
2004), Goteborg, Sweden, June 27 - July 2, 2004, to appear in Nuclear Physics
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