The thermal analysis measurements revealed that both the blocked TDI- and IPDI-based polyisocyanates www.selleckchem.com/products/qnz-evp4593.html started to deblock at about 55-85 degrees C. Compared to the CL-blocked

polyisocyanates, the MEKO- and EC-blocked polyisocyanates had lower thermal dissociation temperatures and faster deblocking rates. We also found that the initial deblocking temperatures of the TDI-based adducts were lower than those of the IPDI-based adducts. The water resistance and tensile properties of the composite films from the blocked-polyisocyanate crosslinkers and hydroxyl-polyurethane emulsion (HPUE) matrix were studied. The tensile strength increased and the elongation at break were lower in the composites compared to the pure HPUE film. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 748-757, 2011″
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reconfigurable surface acoustic wave reflector using an integrated magnetoresistive bit was fabricated and evaluated for use in programmable radio frequency identification tags. It is shown that two distinct reflectivities can be achieved depending Selleckchem Nutlin-3 on the magnetic state of the bit. The experimental results are compared with theoretical calculations of optimal reflectivities achievable from resistively loaded surface acoustic wave transducers. (C) 2011 American Institute of Physics. [doi:10.1063/1.3565998]“
“A well-defined amphiphilic block copolymer was synthesized by the coupling of carboxyl-terminated methoxy poly(ethylene glycol) (MPEG) with ABT-263 datasheet a hydroxyl-terminated octamer of glycolic acid, which was obtained by a stepwise synthetic procedure with the end-group protection and deprotection. The block copolymer had a polydispersity index (PDI) of 1.01, as determined by gel permeation chromatography. It was further coupled to paclitaxel to form a prodrug of paclitaxel. The paclitaxel content in the prodrug was about 10%, and its PDI was 1.02. The antitumor activity of the conjugate against human lung carcinoma

A549 cells was evaluated by mitochondrial dehydrogenase (MTT) assay. The results show that paclitaxel could be released from the conjugate without losing cytotoxicity. Therefore, the well-defined amphiphilic block copolymer from MPEG and oligomer of glycolic acid could potentially provide novel opportunities to obtain reproducible pharmacokinetic behavior in the design of a drug-delivery system. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 758-766, 2011″
“Using first principles calculations, we investigated interface structure effects on the magnetic properties of the Fe/BaTiO3 system. On the BaO-terminated surface, a Fe monolayer is formed as two Fe atoms are adsorbed on the top sites of Ba and O in the (1 X 1) surface unit and a Fe monolayer (ML) is formed on the TiO2-terminated surface as two Fe atoms are adsorbed on the two O top sites. The magnetic anisotropy energy of Fe was higher on the TiO2-terminated surface (1.