The process of sludge digestion using hydrogen peroxide as the only oxidizing agent was carried out. It was pointed out that the application of H2O2 to the digestion process is possible provided that aerobic conditions of the process are strictly controlled in the course of the process. Since H2O2 should be added frequently into the digestion chamber it is highly recommended to supply the diges...

Cyclopropanone hydrate irreversibly inactivates horseradish peroxidase in a time-dependent manner in the presence of oxidizing agent, hydrogen peroxide. The inhibition reaction is a second order reaction of cyclopropanone hydrate with compound I, the 2 electron-oxidized form of peroxidase, and results in covalent modification of the heme cofactor. A new propionic acid side chain is substituted ...

Anthocyanins from highbush blueberry (Vaccinium corymbosum L.) have tremendous potential as natural colorants and functional food with pharmaceutical purposes in food applications. To exploit the potential for food applications, the stability and antioxidant activity of anthocyanins present in blueberries have been studied. The results indicate that anthocyanins from blueberry were stable again...

Accidental Potassium bromate poisoning is uncommon in adults, can have varied manifestations in different patients and can sometimes be deceiving. Potassium bromate white powder and oxidizing agent is used predominantly in bakeries as a maturing agent for flour and as a dough conditioner. It is also occasionally used as a neutralizer in hair kits. This paper deals with nine cases of accidental ...

We have examined the structure-activity relationships in methemoglobin (MetHb) formation by high explosives 2,4,6-trinitrotoluene (TNT), 2,4,6-trinitrophenyl-N-nitramine (tetryl) and 2,4,6-trinitrophenyl-N-nitraminoethylnitrate (pentryl), and a number of model nitrobenzenes. In lysed human erythrocytes the rate constants of oxyhemoglobin (OxyHb) oxidation increased with an increase in single-el...

A simple, accurate and sensitive spectrophotometric method was described for the determination of sulfacetamide sodium in an aqueous solution. The is based on oxidative coupling reaction N,N-diethyl-p-phenelenediamine with presence potassium dichromate as oxidizing agent acidic medium to form a violet- colored product, which has maximum absorbance at 546 nm. Beer׳s law obeyed concentration rang...

A simple, accurate, and rapid method for the quantitative determination of ritodrine hydrochloride (RTH) and isoxsuprine hydrochloride (ISH) in both pure and dosage forms, is described. The method is based on the development of pink colored product as a result of the condensation of 4-aminoantipyrine with phenols in the presence of an alkaline oxidizing agent. The resulting products are measure...

In this method for quantitative determination of mercury in blood, urine, and hair, the specimen is first digested in a mixture of solid potassium permanganate and concentrated sulfuric acid. Excess oxidizing agent is reduced by hydroxylamine hydrochloride. The mercury liberated with stannous chloride is quantified by measuring its absorbance at 254 nm. This method shortens digestion time consi...

Chromium (Cr) is a trace element that is most commonly encountered in the +3 and +6 oxidation states. Hexavalent Cr is a strong oxidizing agent and is used in numerous industrial processes, most notably in the manufacture of stainless steels. Trivalent Cr is the most stable oxidation state and is the form most likely to persist and have metabolic activity in biological systems. It is speculated...

A new, straightforward and high yielding procedure to convert oleanolic acid derivatives into the corresponding δ-hydroxy-γ-lactones, by using the convenient oxidizing agent magnesium bis(monoperoxyphthalate) hexahydrate (MMPP) in refluxing acetonitrile, is reported. In addition, a two-step procedure for the preparation of oleanolic 12-oxo-28-carboxylic acid derivatives directly from Δ(12)-olea...