1 wt %). The crystallization peak

of the composites shifts to higher temperature with the addition of MWCNTs, and among the two melting peaks, the intensity of melting peak at low temperature decreases with increasing MWCNTs content. The composites are more stable than pure PA610 and decompose at higher temperature, suggesting that the accession of MWCNTs can improve the composites’ thermal stability. The storage modulus of the composites decreases with the temperature increasing, but under lower temperature it increases significantly with the addition of MWCNTs-COOH except GW786034 supplier for PANY-0.1 sample. Transmission electron microscope (TEM) images of composites exhibit that the wet melt blending technique can avoid the excess agglomeration of MWCNTs under

vacuum dryness, which benefits MWCNTs to disperse uniformly in matrix. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 113: 2805-2812, 2009″
“Objectives: The role of integrons in the spread of antibiotic resistance has been well established. The aim of this study was to investigate the resistance profiles of Pseudomonas aeruginosa isolated from patients in Zhenjiang to 13 antibiotics, and to identify the structure and dissemination of class 1 integrons.

Methods: The Kirby-Bauer disk diffusion assay was used to determine the rate of P. aeruginosa resistance. Class 1 integrons from multidrug-resistant isolates learn more were amplified by PCR, and their PCR products were sequenced. We also analyzed the integron https://www.selleckchem.com/products/birinapant-tl32711.html structures containing the same gene cassettes by restriction fragment length polymorphism ( RFLP). Isolates were genotyped by pulsed-field gel electrophoresis (PFGE).

Results: The resistance rates were between 29.6% and 90.1%. The prevalence of class 1 integrons was 38.0%. These integrons included five gene cassettes

( aadB, aac6-II, blaPSE-1, dfrA17, and aadA5). The dfrA17 and aadA5 gene cassettes were found most often.

Conclusions: Class 1 integrons were found to be widespread in P. aeruginosa isolated from clinical samples in the Zhenjiang area of China. The antibiotic resistance rates in class 1 integron-positive strains of P. aeruginosa were noticeably higher than those in class 1 integron-negative strains. PFGE showed that particular clones were circulating among patients. Published by Elsevier Ltd on behalf of International Society for Infectious Diseases.”
“This article attempts to develop and prove a technique to determine the degradation of polyethylene terephthalate (PET) for vascular prostheses. The implicit goal is to be able to quantify the amount of degradation to study the effect of in vivo aging. Nuclear magnetic resonance spectroscopy ((1)H-NMR) provides a comprehensive view of chemical macromolecular structures.