direct electron transferring of glucose oxidase was investigated   on reduced graphene and graphene oxide templates. the direct electrochemistry   glucose oxidase on   graphene showed a cyclic voltammograms corresponding to the fad/fadh 2   redox couple with an anodic, cathodic and formal potential of -430, -460 and   -445 mv, respectively in 0.1 m phosphate buffer solution and air saturated   ...

in this research, an enzyme modified electrode has been produced during the electropolymerization of aniline through incorporation of sulfite oxidase into a conducting polymer. then the bioelectrochemical response of resulted sulfite biosensor was investigated at different experimental conditions. study of  the stability of the resulted sulfite biosensor revealed that formation of a passive fil...

the goal of this study was to investigate the common clinical chemistry and distribution of xanthine oxidase (xo) in selected tissues of a mouse model of menopause. twenty four nmri female mice were divided into three groups: normal control (nc), and ovariectomized (ovx) groups and an estrogen-treated ovariectomized (ovx+e) group which received subcutaneous injection of estradiol benzoate (2 mg...

in order to better understand how to prevent enzymatic greenning, it is important to understand  kinetic properties of polyphenol oxidase.  we investigated the effect of sds on the rate of catechol oxidation by small cherry tomato partial purified ppo. ppo activity increased with increasing sds concentration. the most effective concentration of sds was 0.8, 1 and 1.25 mm in according to ph and ...

monoamine oxidase (ec, 1.4.3.4) or amine oxidoreductase catalyzes the oxidative deamination of biogenic amines. abnormal action of the monoamine oxidase b has been associated with neurological dysfunctions including parkinson´s disorder. monoamine oxidase b inhibitors divulged that these agents were effective in the therapeutic management of parkinson's disease. understanding the interaction of...

Introduction: Physalis alkekengi (Solanaceae) is a rich source of various antioxidants. There are some reports that show P. alkekengi has been used for treatment of a wide range of diseases including gout and inflammation. Xanthine oxidase plays a crucial role in gout. Many natural compounds such as various flavonoids have been reported to have inhibitory effect on xanthine oxidase. Metho...

The electrochemistry of banana tissues on a carbon paste electrode modified with multi-walled carbon nanotubes (MWCNTs) is presented. Cyclic voltammetry is applied to investigate the direct electrochemistry of banana tissues i.e. a source of polyphenol oxidase (PPO). A redox couple with an anodic and counterpart cathodic peak is obtained. The influence of various parameters such as pH,...

The endogenous reactive oxygen species ("ROS") formation is associated with many pathologic states such as inflammatory diseases, neurodegenerative diseases, brain and heart ischemic injuries, cancer, and aging. The purpose of this study was to investigate the endogenous sources for "ROS" formation in intact isolated rat hepatocytes, in particular, peroxisomal oxidases, monoamine oxidase, xanth...

Thirteen species of Streptomycetes, Arthrobacters and Mycobacterium were studied for the determination of a potential cholesterol oxidase producer. Only Streptomyces fradiae and Streptomyces rishiriences were found to be capable of producing this enzyme. Streptomyces fradiae was selected for the production of cholesterol oxidase and cultured in different media to find optimum media and con...