objective: today, special attention is paid to the use of zirconium dioxide nanoparticle (nano-zro2), a neutral bioceramic metal, particularly for drug and gene delivery in medicine. however, there are some reports implying that use of nano-zro2 is associated with cytotoxic effects like inhibiting the cell proliferation, dna damage and apoptosis. in the present study, we examined whether nano-z...

Peroxidase (POD) associated with the browning of fresh-cut fruits and vegetableswas extracted from purple skin eggplant(Solanum melongena L.) characterised using reliable spectrophotometric methods. Maximal POD activity was found at 35 °C pH 6.0 guaiacol as substrate. The enzyme stable his optimal temperature (35 °C) hisat stability in range 5.6 - 6.6.Peroxidase retained its full presence ion...

1. The visible absorption spectrum of peroxidase II, isolated from the uterine tissue of oestradiol-treated rats, and some of its derivatives were recorded. The spectral properties of this enzyme are very similar to eosinophile peroxidase and lactoperoxidase, suggesting that these enzymes may have a similar form of haem as prosthetic group. 2. The uterine peroxidase is modified upon interaction...

Peroxidase from Mycobacterium tuberculosis H37Rv was purified to homogeneity. The homogeneous protein exhibits catalase and Y (Youatt's)-enzyme activities in addition to peroxidase activity. Further confirmation that the three activities are due to a single enzyme was accomplished by other criteria, such as differential thermal inactivation, sensitivity to different inhibitors, and co-purificat...

“Click” dendrimer-Pd NPs as peroxidase enzyme mimics of H2O2 sensing using o-phenylenediamine oxidation by to 2,3-diaminophenazine.

At suboptimal H202 concentrations, DPNH inhibits the peroxidase activity of the flavoprotein, DPNH peroxidase, by converting the enzyme to an unstable intermediate that decays slowly to inactive enzyme. It is postulated that at concentrations of DPNH that are saturating for peroxidase activity, this unstable intermediate is responsible for most of the DPNH oxidation that is supported by alterna...

Spent mushroom substrate (SMS) from Pleurotus ostreatus is residue of cultivation that known to have lignocellulolytic enzyme activity in it. Enzyme activities provides information on evidence fungi converting complex substrates simple ones as nutrients for them. In this study, the was found cellulase, lignin peroxidase, and protease. The samples used consisted three SMS were collected Padang P...

Wild-type recombinant horseradish peroxidase purified and refolded from Escherichia coli inclusion bodies has been studied in the system of bis(2-ethylhexyl)sulphosuccinate sodium salt (Aerosol OT)-reversed micelles in octane. In contrast with native horseradish peroxidase the wild-type recombinant enzyme forms dimeric structures as judged by sedimentation analysis. Peroxidase substrates affect...