The solution of hydrogen peroxide is a critical ingredient of the Weber luminol application for blood detection at the crime scene. An ideal alternative to the unstable hydrogen peroxide is a solid compound which is easy to transport, stable and quick to solve in water at the crime scene. Carbamide peroxide (urea peroxide) is one of these solid hydrogen peroxide carriers which is easy to obtain...

OBJECTIVE Clinical isolates of Candida were tested for the presence of catalase and susceptibility to hydrogen peroxide. METHODS MIC was tested by broth dilution technique and catalase was determined by a spectrophotometric procedure. RESULTS All 38 strains tested were inhibited by hydrogen peroxide in concentrations ranging from 4.4 to 88 mM/l, with non-albicans isolates generally requirin...

Peptostreptococcus anaerobius VPI 4330-1 was tested under various conditions for examination of the bactericidal effect of hydrogen peroxide. The cells were most rapidly killed by hydrogen peroxide when they were in the exponential-growth phase. Cooling or starving the cells decreased the bactericidal effect of hydrogen peroxide. The ionophore nigericin and the metal ion chelating agent 2,2'-bi...

Rapid detection of the hydrogen peroxide precursor of peroxide explosives is required in numerous security screening applications. We describe a highly sensitive and selective amperometric detection of hydrogen peroxide vapor at an agarose-coated Prussian-blue (PB) modified thick-film carbon transducer. The sensor responds rapidly and reversibly to dynamic changes in the level of the peroxide v...

Carbamide peroxide and hydrogen peroxide are used as the main agents in vital tooth bleaching. In this study, the influence of peroxide treatment on cross-sectional morphology and mechanical property was investigated. A 3 x 5-mm window of enamel on the labial surface of a bovine tooth was exposed to immersion in 10% or 30% carbamide peroxide or hydrogen peroxide for 30 or 180 min. After immersi...

Catalase, which catalyzes the reduction of hydrogen peroxide to oxygen and water, is considered the primary defense of Neisseria gonorrhoeae against exogenous hydrogen peroxide. Recent reports have demonstrated drastically different sensitivities of the organism to hydrogen peroxide ranging from greater than 80% survival after challenge with 30 mM hydrogen peroxide to less than 0.001% survival ...

Background: Acne vulgaris is a chronic inflammatory disease of pilosebaceous unit, which has variable course, with acute or insidious onset, relapses and recurrences. It one the commonest patients attending dermatology clinic. Tetracyclines are most common oral antibiotic prescribed for acne vulgaris. Aims: Our study aims to compare efficacy topical 2.5% Benzoyl peroxide gel (BPO) Doxycycline v...

It is known that hydrogen peroxide interferes with chemical oxygen demand analysis by consuming oxidation agents such as potassium dichromate, thus leading to overestimation of the chemical oxygen demand measurements. The objective of the study was to investigate the effects of hydrogen peroxide interference and to determine true chemical oxygen demand values on interpreting treatment performan...