Three different grades of commercially
available PLAs and one type of PHBV were blended in different ratios of 50/50, 60/40, 70/30, and 80/20 (PHBV/PLA) using a micro-compounder at 175 degrees C. The DSC and TGA analysis showed the blends were immiscible due to different stereo configuration of PLA polymer and two selleck screening library distinct melting temperatures. However, some compatibility between PHBV and PLA polymers was observed due to decreases in PLA’s glass transition temperatures. Additionally, the blends do not show clear separation by SEM analysis, as observed in the thermal analysis. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012″
“Purpose: The aim of our study was to clarify the accumulation and distribution of uranium in depleted uranium (DU) implanted rats. Materials and Methods: Male Sprague-Dawley rats were surgically implanted in gastrocnemius muscle with DU fragments at 3 dose levels (low, medium and high), and biologically inert tantalum (Ta) fragments high throughput screening compounds were used as controls. At 1 day and 7, 30, 90, 180 and 360 days after implantation, the rats were euthanized and tissue samples including serum and urine were collected to analyze the uranium levels by inductively coupled plasma-mass spectrometry (ICP-MS). Results: At all time points, uranium
levels in all the DU implanted groups were higher than that in Ta control group, and uranium concentrations in kidney and bone were significantly greater than that in other tissues. Otherwise, uranium concentrations increased with a close correlation to the implanted DU doses and duration of exposure, p38 MAPK signaling with a peak at 90 days post-implantation, after which followed by a decreasing period, but still maintained at a relatively high level even at 360 days post-implantation. The uranium concentrations in bone were 6.92 +/- 0.97 mu g U/g, 16.35 +/- 1.67 mu g U/g and 21.64 +/- 3.68 mu g U/g in the low-, medium- and high-dose group animals, while values in kidney tissues were 10.66 +/- 1.10 mu g U/g, 14.06 +/- 1.28 mu g U/g and 17.79 +/- 2.87 mu g U/g,
respectively, at 360 days post-implantation. Conclusion: It was concluded that kidney and bone are the primary reservoirs for uranium redistributed from intramuscularly embedded fragments, and the accumulations in kidney, bone and many other tissues suggest the potential for unanticipated physiological consequences of chronic exposure to DU.”
“To evaluate the complication rate in women with genital tuberculosis undergoing vaginal hysterectomy.
A retrospective study of seven women who underwent vaginal hysterectomy and anterior and posterior colpoperineorraphy for uterovaginal prolapse and found to have genital tuberculosis and 63 women who underwent vaginal hysterectomy during the same period without genital TB.
The mean age was 52.7 in the study group as compared to 47.