a new method for the synthesis of water soluble polyaniline (pani) using hemin chloride (h.c) in the presence of hydrogen peroxide (h.p) is presented. hemin chloride is an effective catalyst for the oxidative polymerization of aniline in the presence of hydrogen peroxide at room temperature. the uv- vis absorption spectra of the product show a distinct absorption peak at 430 nm in ph 4.0 b...

Honey and hydrogen peroxide are effective antibacterial agents. The antibacterial activity of honey is mainly attributed to hydrogen peroxide generation that is produced in the honey by the activity of the glucose oxidase (GOX) enzyme. Ziziphus Spina Christi and Acacia spp. honey samples were collected for the study. Hydrogen peroxide was measured using a sensitive enzymatic/colorimetric assay....

The enhanced chemiluminescence (CL) reaction of the luminol±H2O2±horseradish peroxidase (HRP) system with immobilized HRP using microencapsulation in a sol±gel matrix has been used to develop a biosensor for p-iodophenol, p-coumaric acid, 2-naphthol and hydrogen peroxide. The detection limits obtained for p-iodophenol, p-coumaric acid and 2-naphthol were 0.83 mM, 15 and 48 nM, respectively. Dir...

Ultraviolet photolysis and ultraviolet and hydrogen peroxide oxidation of fourteen commonly used pharmaceutical compounds and two personal care products in mixed solution using low pressure ultraviolet lamp was investigated in laboratory batch experiments. Removal of the compounds followed the first-order reaction kinetic. Three distinct impacts of hydrogen peroxide on ultraviolet and hydrogen ...

Circadian rhythms in animals are regulated at the level of individual cells and by systemic signaling to coordinate the activities of multiple tissues. The circadian pacemakers have several physiological outputs, including daily locomotor rhythms. Several redox-active compounds have been found to function in regulation of circadian rhythms in cells, however, how particular compounds might be in...

Effects of alkaline hydrogen peroxide (AHP) treatment on cellulose crystallinity and cell wall phenolic monomer and monosaccharide composition were measured using cotton and wheat straw (WS). Two WS treatments were used in this study, Type I WS, for which pH is not regulated during AHP treatment, and Type II WS, for which pH is regulated at 11.5 -+ .2 during AHP treatment. Wheat straw had a low...

background: there have been numerous researches on ozone application in dentistry; yet the data regarding its whitening effect is very limited. the present study compares the bleaching effect of ozone with offi ce bleaching. materials and methods: in this experimental study, 15 maxillary premolar teeth were selected and sectioned mesio-distally and bucco-lingually. the sections were then placed...

Effects of alkaline hydrogen peroxide (AHP) treatment on cellulose crystallinity and cell wall phenolic monomer and monosaccharide composition were measured using cotton and wheat straw (WS). Two WS treatments were used in this study, Type I WS, for which pH is not regulated during AHP treatment, and Type II WS, for which pH is regulated at 11.5 -+ .2 during AHP treatment. Wheat straw had a low...

This study examines phenolic peroxidase (POX) in Rhizophora mangle L. leaves in order to assess its role in phenolic manipulation and H 2 O 2 scavenging. Sun-exposed and understorey leaves experiencing varying degrees of nutrient stress were analysed from an oligotrophic cay off the coast of Belize. POX activity was unaffected by growth environment, but increased throughout leaf development and...