The present study was carried out to evaluate the antioxidant and free radical scavenging activity of methanolic extract of Ervatamia coronaria leaves (Apocynaceae) in various systems. DPPH radical, superoxide anion radical, nitric oxide radical and hydroxyl radical scavenging assays were carried out to evaluate the antioxidant potential of the extract. The antioxidant activity of methanolic ex...

the hydroxyl radical (oh•) is a powerful oxidant produced as a consequence of cavitation in water. it can react nonspecifically in breaking down persistent organic pollutants in water into their mineral form. it can also recombine to form hydrogen peroxide which is very useful in water treatment. in this study, terephthalic acid (ta) and potassium iodide dosimetry were used to quantify and inve...

the objective of the present study is to develop and investigate the swelling behavior of ph-sensitive superporous hydrogel (sph) and sph composite (sphc). a novel superporous hydrogel containing poly (methacrylic acid-co-acrylamide) was synthesized from methacrylic acid and acrylamide through the aqueous solution polymerization, using n,n-methylenebisacrylamide as a crosslinker and ammonium pe...

oxygen-derived free radical* (ofr) involvement in ischacmia-rcpcrfusion (ir) injury was investigated in a rat isolated kidney model, using 20 minutes iscliaemia followed by 15 or 60 minutes reperfusion. two antioxidants, the xanthine oxidase inhibitor allopurinol and the hydroxyl radical scavenger dimcthylthiourca (dmtu), were uscit to try and prevent ofr-relatcd damage. renal function was esti...

preoperative gleason score (gs) obtained from trans rectal ultra sonography (trus) is the most common grading system to evaluate the appropriate treatment for patients with clinically localized prostate cancer. but this method showed upgraded and downgraded results in comparison to gleason score obtained from radical prostatectomy. the current study aimed to determine clinical or pathological v...

reactions of free radicals and reactive oxygen species (ros) with biological molecules in vivo play an important physiological role in many diseases. 2,2-diphenyl-1-picrylhydrazyl (dpph) is a stable free radical and often used as a routine reagent to evaluate the antioxidant capacity of an antioxidant. this study was undertaken to investigate the free radical-scavenging and antioxidant activiti...