Eighteen of 25 isolates of Salmonella enterica serovar Typhi were multidrug resistant and contained class 1 integrons with a single cassette, dfrVII or aadA1. The dfrVII-containing integron was likely borne on an IncHI1 plasmid. Salmonella serovar Typhi could become resistant to broad-spectrum cephalosporins by integrating cassettes, such as veb-1, a common cassette in Asia.

Dielectric properties of xBaTiO 3 -(1-x)CoFe 2 O 4 composite materials have been investigated. Dielectric properties of BaTiO 3 , CoFe 2 O 4 and 0.5BaTiO 3 -0.5CoFe 2 O 4 samples show frequency dependence, which is classified as relaxor behavior with different relaxing degree. The relaxor behaviors were described using the modified Curier-Weiss and Vogel-Fulcher laws. Among three above samples, the BaTiO 3 sample has highest relaxing degree. Photoluminescence spectral indicated defects, which might in turn control relaxing degree.

No abstract