in the present research, the effect of different peroxide charges and reaction times were investigated inhydrogen peroxide bleaching of mixed old newsprint and old magazine deinked pulp. in thebeginning, mixed recycled papers were pulped using conventional method and then deinked byflotation. in addition, deinked pulps (mixture ratio of 70% onp and 30% omg) were bleached withhydrogen peroxide a...

The beneficial effect of alpha-tocopherol on doxorubicin-induced toxicity was studied in rats. alpha-Tocopherol (400 mg/kg/day) was administered orally, daily for a period of 2 months along with/without doxorubicin (2.5 mg/kg, i v weekly once for 8 weeks). Histology showed liver necrosis, heart myocyte degeneration, glomerular and tubular degeneration, cellular infiltration and desquammation of...

In this study, the reusability and process stability of nano-reengineered horseradish peroxidase was investigated in a fluorescence-based sensing system for hydrogen peroxide determination as a model application. To this end, dendron macromolecules were attached to the enzyme surface through bio-conjugation techniques. The resulting enzyme–polymer nanoparticles, with an average size of 14(±2) n...

Until recently, no generally applicable oxidizing reagents were known for P(III) compounds, al­ though P(III) compounds are readily oxidized to form the corresponding P(V) compounds. All of the oxidizing reagents that were tested, e.g. hydro­ gen peroxide [1], aqueous iodine [2], nitrogen ox­ ides [3], 3,3-dimethyloxirane, stilbenene ozonide [4], m-chlorperbenzoic acid [5], tetrabutylammonium p...

The oxidation-extraction desulfurization of Saudi Arabian crudes was conducted with hydrogen peroxide-acetic acid oxidation system. The selection of extractant, the optimization of oxidation-extraction conditions, and the exploration of desulfurization mechanism were studied. As DMF was used as the extractant, the optimal desulfurization rate of 35.11 % and oil recovery of 95 % were obtained at...

...............................................................................................3 Introduction............................................................................................3 Arsenic Maximum Contaminant Level.............................................................3 Arsenic Speciation...................................................................................

The reactions between hydrogen peroxide and hemeproteins have been coupled to the oxidation of dihydroriboflavin so as to provide a simple method for measuring the rate constant of hemeprotein peroxidation. Dihydroriboflavin rapidly reduces the higher oxidation states of iron and the hydroxy radicals which are the products of the hemeprotein/hydrogen peroxide reaction. The rapid reduction of th...

Shelled almonds of two Italian varieties, Romana and Pizzuta, peeled and unpeeled, were roasted and packed under different conditions: air (control), vacuum, and Maillard reaction volatile compounds (MRVc) derived from the roasting process. Samples were stored for approximately 8 months at room temperature, without light, and, at regular intervals, were collected and analyzed to evaluate the pr...

This work aims studying the photochemical behaviour of octylphenol (OP) in aqueous solution exposed to simulated UV solar radiation, in lab-scale experiments. The OP photolysis was also investigated by varying different reaction parameters such as: initial pH, initial concentration of OP, reaction temperature, concentration of hydrogen peroxide, presence/absence of dissolved organic matter, HCO...