With x-ray computed tomography, we examine settling of the particulate
phase in both flowing and quiescent curing systems and compare the experimental results to the model predictions. check details The model is also validated with temperature measurements. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 1587-1598, 2011″
“We report a rare case of a woman with bilateral papillary cystadenomata of the broad ligament with von Hippel-Lindau disease (VHL) (other manifestations: capillary hemangioblastomas of the spinal cord). Patient surveillance is important, because in the course of VHL-associated tumors malignant lesions may arise that are relevant for the prognosis.”
“Dysprosium-added sintered magnets were prepared from blends of Nd-15.5(Fe,Co,Ga)(78.2)B-6.3 and Dy2S3 powders; their microstructure and magnetic properties were compared to those of the magnets made with Dy2O3 additions or from single (Nd,Dy)-(Fe,Co,Ga)-B alloys. The addition of Dy2S3 leads to replacement of the neodymium oxide phases in the sintered magnets by the Nd2O2S and NdS phases. The EPZ5676 in vitro magnets prepared with both the Dy2S3 and Dy2O3 powders exhibited inhomogeneous distribution of Dy within the (Nd,Dy)(2)Fe14B grains with Dy-rich outer grain regions. However, in a marked difference from the Dy2O3-added and single-alloy magnets, where the grain-boundary
oxide phases were Dy-rich, the magnets prepared with Dy2S3 had their sulfur-containing grain-boundary phases depleted of Dy. With the larger fraction of Dy atoms available for alloying the main (Nd,Dy)(2)Fe14B
phase, the magnets prepared with Dy2S3 showed the largest coercivity gain per 1 at.% of the added Dy. (C) 2011 American Institute of Physics. [doi:10.1063/1.3574444]“
“The ring-opening polymerization of L- or D-lactide was realized in the presence of dihydroxyl or monomethoxy poly(ethylene glycol) (PEG) with a number-average molecular weight beta-catenin inhibitor of 2000. The resulting low-molar-mass poly(L-lactide) (PLLA)/PEG and poly(D-lactide) (PDLA)/PEG triblock and diblock copolymers were characterized with nuclear magnetic resonance (NMR), differential scanning calorimetry, size-exclusion chromatography, and X-ray diffractometric analysis. Bioresorbable hydrogels were successfully prepared from aqueous solutions containing both copolymers because of interactions and stereocomplexation between the PLLA and PDLA blocks. Gelation was evaluated with the tube inverting method and rheological measurements. A phase diagram was realized with gel-sol transitions as a function of concentration. The rheological properties of the hydrogels were investigated under various conditions through changes in the copolymer concentration, temperature, time, and frequency. It was concluded that the hydrogels constituted a dynamic and evolutive system because of the continuous formation/destruction of cross-links and degradation.