The films were characterized using several techniques, including x-ray diffraction, high-resolution transmission electron VX-809 order microscopy, and magnetic property measurements. Films prepared at lower oxygen pressures were found to be monoclinic, whereas the films prepared at high oxygen pressures were cubic. Both film phases exhibited superparamagnetic-like responses,
with the monoclinic films showing a very high coercive field at low temperatures. Careful microstructural analysis showed no secondary phases or compositional variation that could account for the observed magnetic response. A model, based on the widely accepted bound polaron theory for insulating ferromagnets, is proposed to explain the magnetic behavior of Co doped Sm2O3 films. In this model, exchange mediating defects form magnetically active regions that behave like superparamagnetic clusters; however, unlike in superparamagnetic systems, the size of magnetically active regions is not static but changes find protocol dynamically with temperature. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3610790]“
“No data are available on 2009 H1N1 influenza in human immunodeficiency virus (HIV)-infected children, a highly susceptible and vulnerable population. We report 13 cases of pandemic influenza
among a cohort of HIV-infected pediatric patients. Clinical features of H1N1 influenza were similar to those described in the general population. Most patients received antivirals on an outpatient basis. An uneventful evolution was observed in all patients, only 2 of whom required hospitalization. Influenza had no effect on the evolution of HIV infection.”
Our aim was to evaluate the relationship between bone mineral density (BMD) and fasting serum long-acting natriuretic peptide (LANP) concentration in renal transplant recipients.
Patients and methods: Fasting blood samples were obtained from 65 renal transplant recipients. BMD was measured using dual energy X-ray absorptiometry in lumbar vertebrae (L2-L4). Serum LANP levels were measured using a commercial enzyme immunoassay kit.
Results: Six patients (9.2%) had osteoporosis and 28 patients (43.1%) had osteopenia in renal transplant recipients. Increased serum LANP (p < 0.001) was significantly correlated with low lumbar T-score cut-off points between groups (normal, osteopenia, and osteoporosis) BKM120 in renal transplant recipients. Female patients had lower lumbar BMD than male renal transplant recipients (p = 0.027). Univariate linear regression analysis indicated that lumbar BMD were positively correlated with height (p = 0.038), body weight (p = 0.003), and body mass index (BMI; p = 0.019), whereas negatively correlated with LANP (p = 0.004) among the renal transplant recipients. Multivariate forward stepwise linear regression analysis of the significant variables revealed that body weight (R 2 change = 0.132; p = 0.006) and LANP (R 2 change = 0.093; p = 0.