Different parameters were investigated to evaluate their effect on the process removal efficiency of reactive dye from simulated spent reactive dye bath, by solar / TiO2 / H2O2, including H2O2 concentration, TiO2 loading and pH. As a result 99% of reactive dye can be removed at a TiO2 loading of 400mg/l, H2O2 concentration of 150 mg/l and of pH: 5.2. The effect of photo-catalytic deactivation o...

Hydrogen peroxide (H2O2) is a relatively long-lived signaling molecule that plays an essential role in oocyte maturation, implantation, as well as early embryonic development. Exposure to relatively high levels of H2O2 functions efficiently to accelerate oocyte aging and deteriorate oocyte quality. However, little precise information exists regarding intra-oocyte H2O2 concentrations, and its di...

The photodegradation of two organophosphorus pesticides, malathian and diazinon, by sulfate radicals and bicarbonate radicals in aqueous solution were studied. The effect of the operational parameters such as pH, salt concentration, water type, H2O2 concentration and initial concentration of pesticides was studied. Gas chromatography mass spectroscopy (GC-MS) was used for analyses of pesticides...

In the present work advanced oxidation process, photo-Fenton (UV/H2O2/Fe+2) system, for treatment of wastewater contaminated with oil was investigated. The reaction influenced by input concentration hydrogen peroxide H2O2, initial amount iron catalyst Fe+2, pH, temperature and in wastewater. removal efficiency system UV/ H2O2/Fe+2 at optimal conditions dosage (H2O2 = 400mg/L, Fe+2 40mg/L, pH=3,...

In order to see the influence of different variable parameters (initial pH of the solution, Fe++ concentration and H2O2 concentration) and the efficiency to remove Malachite Green dye (Basic Green 4) from aqueous solution, Fenton Oxidation method was employed. Then different parameters were studied using known concentration (150 mg/l) and initial COD (256 mg/l) of prepared dye synthetic solutio...

BACKGROUND Necroptosis is an important mode of cell death, which is due to oxidant stress accumulation. Our previous study indicated that oxidant stresses could be reduced by Timosaponin B-II (TBII), a kind of Chinese herb RhizomaAnemarrhenae monomer extraction. We wonder the possible effect of Timosaponin B-II, whether it can protect cells from necroptosis via reducing the oxidant stress, in R...

BACKGROUND With the use of cultured human retinal pigment epithelial cells, we have previously described a number of cellular responses to oxidative stress caused by H2O2. We also demonstrated that the cytotoxicity caused by H2O2 could be prevented by the prostaglandin derivative, 15-deoxy-delta 12, 14-Prostaglandin J2 (15d-PGJ2). RESULTS Further characterization of the experimental system in...

The present work is focused on the homogeneous and heterogeneous photo-catalytic degradation of Hacid, a non-biodegradable dye intermediate from dye manufacturing industries, using Advanced Oxidation Processes (AOPs) such as UV, UV/H2O2, UV/H2O2/Fe 2+ (photo-Fenton process), UV/TiO2 and UV/H2O2/TiO2. Degradation experiments were carried out to optimize the amount of catalyst, effect of Hacid co...

A brief exposure to hydrogen peroxide (H2O2) induces severe deterioration of primary cultured neurons in vitro. We have investigated a link between the H2O2-induced neuronal death and Ca2+-permeable TRPM2 channels regulated by ADP-ribose (ADPR). In cultured cerebral cortical neurons from fetal rat, TRPM2 proteins were detected at cell bodies and neurite extensions. Application of H2O2 to the cu...

High levels of (+)-catechin are found in the skin and seed of many fruits such as apples and grapes. Dietary supplementation with (+)-catechin has been demonstrated to protect epidermal cells against damage induced by ultraviolet B (UVB) radiation. However, the underlying mechanisms are not well understood yet. To determine whether (+)-catechin protects keratinocytes from UVB-induced damage, th...