43 research outputs found
Coherent Photoproduction of pi^+ from 3^He
We have measured the differential cross section for the
He reaction. This reaction was studied using
the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons
produced with the Hall-B bremsstrahlung tagging system in the energy range from
0.50 to 1.55 GeV were incident on a cryogenic liquid He target. The
differential cross sections for the He
reaction were measured as a function of photon-beam energy and pion-scattering
angle. Theoretical predictions to date cannot explain the large cross sections
except at backward angles, showing that additional components must be added to
the model.Comment: 11 pages, 16 figure
Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive production
We present studies of single-spin asymmetries for neutral pion
electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV
polarized electrons from an unpolarized hydrogen target, using the CEBAF Large
Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator
Facility. A substantial amplitude has been measured in the
distribution of the cross section asymmetry as a function of the azimuthal
angle of the produced neutral pion. The dependence of this amplitude
on Bjorken and on the pion transverse momentum is extracted with
significantly higher precision than previous data and is compared to model
calculations.Comment: to be submitted PL
Evidence for a backward peak in the gamma+d->pi^0+d cross section near the eta threshold
High-quality cross sections for the reaction gamma+d->pi^0+d have been
measured using the CLAS at Jefferson Lab over a wide energy range near and
above the eta-meson photoproduction threshold. At backward c.m. angles for the
outgoing pions, we observe a resonance-like structure near E_gamma=700 MeV. Our
model analysis shows that it can be explained by eta excitation in the
intermediate state. The effect is the result of the contribution of the
N(1535)S_11 resonance to the amplitudes of the subprocesses occurring between
the two nucleons and of a two-step process in which the excitation of an
intermediate eta meson dominates.Comment: slightly modified title, additional paragraph and a table (Table 2)
added on p. 5; to be submitted to EPJA, 6 pages, 3 figure
Silver spoons and snake body sizes: prey availability early in life influences long-term growth rates of free-ranging pythons
A054 Age-Related Differences in Ventricular Remodeling and Long-Term Heart Failure Outcomes Following Acute Coronary Syndrome
O-65 The relationship between biomarkers of inflammation, clinicopathological characteristics and cancer specific survival in early breast cancer
A051 Long-term Outcomes for Patients with Heart Failure in New Zealand according to Ejection Fraction Phenotype
Hyperuricaemia and gout in New Zealand rural and urban MÄori and non-MÄori communities
Background: There are few current data on the prevalence of hyperuricaemia and gout in New Zealand, particularly among the indigenous MÄori population.
Aims: To determine the prevalence of gout and hyperuricaemia in rural and urban MÄori and non-MÄori community samples and describe the treatment and comorbidities of participants with gout.
Methods: Participants aged 20-64 years were recruited by random selection from the electoral roll. MÄori samples were selected from among those identified as being of MÄori descent on the roll and who self-identified as being of MÄori ethnicity at interview. Personal medical history, blood pressure, anthropometrics, fasting lipids, glucose, HbA1c and urate were recorded.
Results: There were 751 participants. Mean serum urate (SU) was 0.30âmmol/L (0.06-0.69âmmol/L). MÄori had a significantly higher prevalence of hyperuricaemia (SU > 0.40âmmol/L) compared with non-MÄori (17.0% vs 7.5%, P = 0.0003). A total of 57 participants had a history of gout, with a higher prevalence in MÄori compared with non-MÄori (10.3% vs 2.3%, P 0.36âmmol/L. Participants with gout were more likely to have metabolic syndrome, diabetes, cardiac disease or hypertension.
Conclusions: Gout and hyperuricaemia were more prevalent in MÄori, and participants with gout were more likely to have comorbidities. There was not a higher overall adjusted cardiovascular disease risk in MÄori participants with gout. Despite the high prevalence of gout, management remains suboptimal.
(© 2012 The Authors; Internal Medicine Journal © 2012 Royal Australasian College of Physicians.