A carbon Paste electrode modified with cobalt (II) phthalocyanine (CoPC) was used as a sensitive potentiometric sensor for determination of ascorbic acid in aqueous solutions. The potential response of the electrode is a linear function of ascorbic acid concentration over the range 5 10 to 10 M (?1- 1800 µg ML ) with a Nernstian slope of 56 mV at pH 7. The limit of detection was 0.2 µg ...

voltammetric techniques have been considered as important methods among the analytical techniques used for the identification and determination of trace concentrations of many biological molecules such as l-ascorbic acid (aa). l-ascorbic acid is an electro-active molecule, though it is difficult to determine its value directly with a majority of electrodes made of carbon and transition metals, ...

drought is the most common environmental stress in vineyard occurs in soils with low water content, even in irrigation condition. to evaluate foliar spraying of ascorbic acid under drought stress, a research during 2012 to 2013 years in the natural environment, and one year after the establishment of the cuttings in clay loam soil was conducted. cultivars with two-level white seedless and khosh...

ascorbic acid (vitamin c) supplementation has been documented as a useful tool to improve the performance of laying birds reared under harsh environmental conditions. however, there is limited information on the use of ascorbic acid as a means of ameliorating the stressful conditions imposed by feed restriction. to this effect a 3 × 2 factorial experiment was carried out to evaluate the effect ...

a carbon paste electrode modified with cobalt (ii) phthalocyanine (copc) was used as a sensitive potentiometric sensor for determination of ascorbic acid in aqueous solutions. the potential response of the electrode is a linear function of ascorbic acid concentration over the range 5 10 to 10 m (?1- 1800 µg ml ) with a nernstian slope of 56 mv at ph 7. the limit of detection was 0.2 µg ml ascor...

background: oxidative stress in teratozoospermic semen samples caused poor assisted reproductive techniques (art) outcomes. among antioxidants, ascorbic acid is a naturally occurring free radical scavenger and as such its presence assists various other mechanisms in decreasing numerous disruptive free radical processes. objective: the main goal of this study was to evaluate potential protective...

The effects of L-ascorbic acid and its stable analogue L-ascorbic acid 2-glucoside on the restoration of liver mass and recovery of liver function after 70% partial hepatectomy (PH), were compared with other natural vitamin C analogues in rats in vivo. L-Ascorbic acid (100 mg/kg/d, intraperitoneally (i.p.))- and L-ascorbic acid 2-glucoside (50 mg/kg/d, i.p.)-treated rats showed an approximately...