(C) 2014 European Society check details for Vascular Surgery. Published by Elsevier Ltd. All rights reserved.”
“BACKGROUND: This research has assessed the impact of sulfate accumulation on the performance of two biofilters treating CS2. Both biofilters were packed with a pelletized organic fertilizer and operated in downflow mode (Biofilter A) and flow reversal mode (Biofilter B). The performance of the biofilters
after an excessive accumulation of sulfate has also been evaluated. RESULTS: The excessive accumulation of sulfate and the reduction in the packing material’s moisture content resulted in a decrease in the initial high removal efficiency recorded during the first 50 days (approx.) of operation in both biofilters. A recovery strategy based on mixing and washing the packing material led to a sustained RE of 40 +/- 9% and 62 +/- 11% for Biofilters A and B, respectively. Both biofilters recovered their initial performance after irrigation. A high CO2:EC ratio suggested
that secondary oxidation reactions related to heterotrophic bacteria occurred in both bioreactors. The maximum elimination capacity (ECmax) recorded in Biofilters A and B was 11.6 and 16.6 g CS2 m-3 h-1, respectively. CONCLUSIONS: This study confirmed the capacity biofilters treating CS2 have to recover after sulfate accumulation episodes and the importance of optimized irrigation strategies. The benefit of the flow reversal operating mode was highlighted. Copyright (c) 2012 Society of Chemical Industry”
“Objectives: The “”tissue AS1842856 solubility dmso oxygen saturation (StO(2)) foot-mapping”" method was developed using a non-invasive near-infrared tissue oximeter monitor to classify the foot regions as ischemic and non-ischemic areas. The purpose of this study was to evaluate StO(2) foot-mapping as a reliable method to detect ischemic areas in the feet of patients with critical limb
SBE-β-CD ischemia (CLI), and to compare the results with assessments from the angiosome model.
Methods: The foot areas of 20 CLI patients and 20 healthy controls were classified into four regions: (1) 0 <= StO(2) < 30%, (2) 30 <= StO(2) < 50%, (3) 50 <= StO(2) < 70%, and (4) 70 <= StO(2) <= 100% to perform StO(2) foot-mapping. Each area occupancy rate was compared between the two groups, and the threshold StO(2) value for detecting ischemia was set. Next, the locations of ulcers (in 16 patients) were compared to the predicted ischemic regions by the StO(2) foot-mapping and by the angiosome model and angiography.
Results: In regions (1) and (2) (StO(2) < 50%), the area occupancy rate was significantly higher in the CLI group and almost zero in the control group, so that the threshold StO(2) value for detecting ischemia was set at 50%. The locations of ulcers were compatible with StO(2) foot-mapping in 87.5% of the cases (14/16), while they were compatible with the assessment from the angiosome model in 68.8% of the cases (11/16).