The optimal permanent magnetic properties are obtained at x = 2, and the value of H-ci, M-s, M-r, and (BH)(max) are 6.52 kOe, 150.2 emu/g, 120.9 emu/g, and 22.34 MGOe, respectively. Typical magnetization behaviors of nanocomposite magnets are found in these ribbons. The significant remanence enhancement indicates Tariquidar in vitro that a strong intergrain
exchange coupling exists in all ribbons studied in this work. By Co substitution, the intergrain exchange coupling is enhanced significantly. The study of microstructure shows that the larger grains of Pr-2(Fe,Co)(14)B hard phase are surrounded by the smaller grains of alpha-(Fe,Co) soft phase with size about 10-20 nm in the ribbon with Co substitution. This kind of microstructure is in favor of exchange coupling between magnetically hard and soft phases and results in excellent magnetic properties. (c) 2011 American Institute of Physics. [doi:10.1063/1.3566074]“
“In view of the analogous transmembrane function to cell penetrating peptides, guanidine group was incorporated into chitosan by chemical modification to enhance the transfection performance of chitosan vectors. Guanidinylated chitosan (GCS) was shown to be well soluble
in neutral aqueous solution. The interaction between GCS with plasmid DNA was characterized by agarose retardation experiment and ethidium bromide displacement assay. GCS formed more stable complexes selleck chemical with DNA under physiological pH than chitosan. The transfection efficiency of GCS was evaluated employing COS-7 cell line-GCS polyplexes demonstrated higher transfection efficiency and lower cytotoxicity relative to chitosan. The optimum efficiency of GCS was achieved in the vicinity of the critical complexing ratio. The results of flow cytometry indicated that guanidinylation
www.selleckchem.com/products/Temsirolimus.html promoted an eightfold increase in the cell uptake. The study revealed that guanidinylated chitosan is a promising candidate as an effective nonviral vector for in vivo gene delivery. (C) 2011 Wiley Periodicals, Inc. J Appl PolymSci 121: 3569-3578, 2011″
“Purpose: To classify peripheral pulmonary arterial pseudoaneurysms (PAPs) associated with infectious lung diseases according to angiographic findings and to determine treatment options for PAPs on the basis of angiographic classifications.
Materials and Methods: The institutional review board approved this study. A total of 24 patients with massive hemoptysis had PAPs that were detected at pulmonary computed tomographic (CT) angiography; underlying diseases were pulmonary tuberculosis (n = 16), a fungus ball (n = 5), lung abscess (n = 2), and pneumonia (n = 1). All patients underwent bronchial and nonbronchial systemic collateral arterial angiography and pulmonary and selective pulmonary angiography.