A preliminary screening of the most common liquid solvents (silicone oil 20 cSt, silicone oil 200 cSt and 2,2,4,4,6,8,8-heptametilnonane) and solid polymers (Kraton (R). G6157, Desmopan (R) DP9370A and Elvax
(R) 880) resulted in the selection of silicone oil 200 cSt (S200) and Desmopan DP9370A (D9370) for further investigation based on their high affinity for CH(4), biocompatibility and nonbiodegradability.
RESULTS: Under abiotic conditions, the increase in gas recirculation from 0 to 1 vvm in the absence of a transfer vector increased the overall mass transfer coefficient for oxygen (k(L)a) by 195%. The presence check details of S200 and D9370 at 10% (v/v) under operation at 1 vvm of gas recirculation rate mediated an increase in kLa of 100% and 136%, respectively. Likewise, the increase in gas recirculation from 0 to 1 vvm in the absence of a transfer vector and in the presence of S200 during the continuous biodegradation of methane at 3% (v/v) and 7.3 min empty bed residence TH-302 time resulted in increases in CH(4) removal and CO(2) production rates of 47% and 36%, respectively. Nevertheless, no significant enhancement in CH(4)
removal due to the presence of 10% of Desmopan or silicone oil was recorded under operation at 1 vvm.
CONCLUSIONS: These results suggest that microbial activity rather than mass transport could be the limiting step in biological CH(4) abatement in this system, contrary to that observed in previous studies with stirred tank reactors, where the organic phase addition increased methane biodegradation. (C) 2010 Society of Chemical Industry”
“Objective. Acute pyelonephritis is a common infectious disease
in children this website and can result in permanent renal damage. Interleukin-6 (IL-6) is an important mediator of inflammation in response to bacterial infection. This study investigated the potential relationship between acute-phase IL-6 and subsequent renal scarring in children with a first time febrile acute pyelonephritis. Material and methods. In total, 79 children (age range 1-120 months) with a first time febrile urinary tract infection (UTI) were included. The diagnosis of acute pyelonephritis was confirmed by 99mTc-dimercaptosuccinic acid (DMSA) renal scan. Serum and urine samples were collected for IL-6 measurement by enzyme-linked immunosorbent assay before antibiotic treatment for the infection. Results. The 79 children were divided into acute pyelonephritis (n=45) and lower UTI (n=34) groups according to the findings of DMSA scans. The initial serum and urine IL-6 levels of children with acute pyelonephritis were significantly higher compared with lower UTI (p 0.001). Renal scarring was detected at the follow-up DMSA scans in 15 (34.1%) of the 44 children with acute pyelonephritis. Both serum and urine IL-6 levels during the acute phase of pyelonephritis were significantly higher in children with renal scarring than in those without (p=0.005 and p = 0.002).