Molecular weight and polydispersity index have been determined by gel permeation chromatography. Detailed thermal degradation studies of polymers have been carried out to ascertain its thermal stability. Multiple linear regression (MLR) method has been used to calculate activation energy (E-a) and frequency factor (Z). Thermodynamic parameters such as free energy (G*),

entropy change (Delta S*), and rate constant for activation (k(r)) have also been evaluated on the basis on Ozawa-Flynn-Wall method. Softening temperatures (T-s) of these resins have been obtained from differential scanning calorimetry (DSC). All the synthesized resins have shown reasonably good selleck inhibitor antimicrobial activities as compared to standard drugs. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 573-585, 2011″
“In order to investigate magnetic structure and the mechanism of the Curie temperature (T-C) enhancement in TbNi4Co and TbNi4Fe compounds in comparison CT99021 solubility dmso with TbNi5, electronic structure calculations were performed within the LSDA + U method (local spin density approximation with Hubbard U-correction).

Magnetic moments for Ni, Fe, and Tb ions resulted from the LSDA + U calculations for TbNi5 and TbNi4Fe compounds were found to be in very good agreement with the ones refined from the neutron data. Experimental magnetization measurements demonstrate a substantial increase of T-C in TbNi4Co (T-C similar to 60 K) and especially in TbNi4Fe (T-C similar to 280 K) in comparison learn more with TbNi5 (T-C similar to 23 K) that correlates with the growth of the exchange-interaction parameter in the 3d sublattice calculated in the present work. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563083]“
“Chronic infections may mimic antineutrophil

cytoplasmic antibody (ANCA)-associated vasculitides (AAV). We investigated which markers may help in the diagnosis and the prognosis of infections associated with proteinase 3 (PR3) and myeloperoxidase (MPO)-ANCA. In this study (1993-2008)-with an average follow-up of 5.1 years-we compared 66 AAV patients with 17 PR3 and/or MPO-ANCA-positive patients with protracted bacterial (11/17) or viral (6/17) infections. Seven of 17 patients had subacute bacterial endocarditis (SBE), while six of 17 patients had various autoimmune manifestations of chronic hepatitis C virus (HCV) infection. We determined ANCA, antinuclear antibodies, anti-PR3, anti-MPO, anticardiolipin (aCL), antibeta 2 glycoprotein I (beta 2-GP I), cryoglobulins, C3, and C4. Patients with infections were younger than AAV patients (p < 0.01). There was no difference in frequency of renal and skin lesions. AAV patients more frequently had pulmonary and nervous system manifestations (p < 0.01). Patients with infections more frequently had dual ANCA (high PR3, low MPO), aCL, anti-beta 2-GP I, cryoglobulins, and hypocomplementemia (p < 0.001).