All the extracts showed radical scavenging activity. Roots crude extract showed IC(50)
= 0.521 mg/mL. The presence of phenolic compounds and tannins were screened by Folin-Ciocalteau assay, high performance liquid chromatography (HPLC), Ms/MS(n) and x-rays diffraction. The reduction power of ethanolic extracts was assayed too. This study suggested buy BAY 1895344 the Egyptian Jatropha curcas roots and stem are possible sources of natural radical scavengers.”
“A method has been proposed to study optical characteristics of GaN/Al(0.45)Ga(0.55)N bilayer on sapphire substrate at room temperature. Utilizing the incomplete absorption between 270 and 365 nm, absorption spectrum and extinction coefficient of wurtzite GaN both below and above energy gap were determined. Energy gaps of GaN and Al(0.45)Ga(0.55)N click here were located at 3.4 and 4.62 eV, respectively, in the same spectrum. Right above absorption
edge (354 nm), the extinction coefficient was 0.269. Average total thickness calculated from transmission and reflection spectra was 1413 and 1407 nm, respectively, and thickness of GaN was calculated as 268.5 nm from the envelope of maximum reflection resulted from GaN/AlGaN interface. By comparison of two spectra, it was deduced that reflection curve had much larger oscillation amplitude than transmission spectrum, thanks to the larger contrast of interference fringes V. Additional half-wave loss was deduced at air/GaN interface, which resulted
in the reverse of interference extrema. (C) 2010 American Institute of Physics. [doi:10.1063/1.3483952]“
“Purpose: To evaluate the effects of pathological stage and surgical margin status on biochemical failure rates after radical prostatectomy (RP). Materials and Methods: The records of 205 patients who underwent RP for clinically localized prostate cancer (CaP) were evaluated. Known risk factors for biochemical failure (BF) were analyzed using univariate and multivariate logistic regression analysis. The effects of surgical margin status together with pathological stage on BE were evaluated. p values lower than 0.05 were accepted to be statistically significant. Results: Pathological stage, positive surgical margin (PSM), seminal vesicle invasion, lymph node involvement, biopsy Gleason Z-DEVD-FMK mouse score and postoperative Gleason score were the factors associated with BF in univariate analysis. Logistic regression analysis revealed that pT3a patients with PSM had a significant BF rate when compared to pT2 patients with a negative surgical margin (NSM) (OR 7.46, p = 0.002). pT3a patients with a NSM had a similar BF rate to that of pT2 patients with PSM. Conclusions: pT2 patients with PSM had a similar biochemical prognosis to that of pT3a patients without PSM, implicating that a PSM may have a negative effect on prognosis similar to that of extracapsular invasion. Copyright (c) 2011 S.