Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara,1144, Iran ABSTRACT This study was conducted the effect of stress on blood glucose and cortisol levels in cultured great sturgeon. Blood sampling was done and then water level decreased to the half in experimental tanks. The fish were exposed in that situation and second blood sampling was taken after ...

In this research, we have demonstrated a one-step electrochemical deposition of dendritic gold nanostructures (DGNs) on graphite rod (GR) electrode without any template, seeds, surfactants, or stabilizers. Three methods, namely, constant potential amperometry (CPA), pulse amperometry, and differential voltammetry, were used for DGN synthesis GR further application in enzymatic glucose biosensor...

Induction of Entner-Doudoroff pathway enzymes in Pseudomonas fluorescens was investigated to study the role of gluconate as a possible inducer. Glucose oxidase-deficient mutants were isolated and characterized. One of these mutants, gox-7, was deficient in particulate glucose oxidase; another mutant, gox-17, was deficient in particulate glucose and gluconate oxidase activities. Gluconate, but n...

An enzymatic biofuel cell is integrated on a screen-printed electrode as basis for self-powered biosensor. A glucose/O2 consisting of pyrroloquinoline quinone-dependent glucose dehydrogenase embedded within an Os-complex modified redox polymer bioanode to oxidize and non-limiting bilirubin oxidase-based gas diffusion biocathode in the direct-electron transfer regime reduction O2 showed glucose-...

Glucose oxidase catalyzes the formation of metallic gold particles in immediate proximity of the protein from gold (III) chloride in the absence of any other catalytic or reductive substrates. The protein-mediated gold reduction reaction leads to size-controllable gold particle formation and concomitant association of the enzyme in an electrically conductive metallic template. Such an enzyme im...

Microelectrodes have been used for over 30 years of glucose biosensor history. Two different types of glucose biosensors were developed using 176μm and 25μm diameter Pt wire cylindrical microelectrodes. The 176 μm Pt wire type microelectrodes were modified with non-conductive polymers and glucose oxidase enzyme. The lifetime of biosensors was over 50 days and had negligible response to interfer...

Scanning Electrochemical Microscopy is a tool for imaging and investigate surfaces by meaning of chemical reactivity, electric conductivity, and enzymatic activity. This technique is typical electrochemical cell plus three axis positioner. Positioner allows to measure typical electrochemical measurements, like Cyclic Voltammetry, Chronoamperometry, Impedance Spectroscopy, etc. in the vicinity o...

AIMS Exposure to high glucose (HG) stimulates reactive oxygen species (ROS) production by NADPH oxidase in cardiomyocytes, but the underlying mechanism remains elusive. In this study, we have dissected the link between glucose transport and metabolism and NADPH oxidase activation under hyperglycaemic conditions. METHODS AND RESULTS Primary cultures of adult rat cardiomyocytes were exposed to ...

In Hydrogele eingebrachte chemische Reaktionsnetzwerke können responsive Materialien zu komplexen, selbstregulierenden transformieren, die eine Rückkopplung auf externe Stimuli generieren können. Diese Arbeit präsentiert aus dem Wirt-Gast-Paar β-Cyclodextrin und Ferrocen als supramolekulare Vernetzer. Ein redoxresponsives Verhalten des Systems wird induziert durch Treibstoff-Enzym-Paare Meerret...