Changes in quality, total ascorbic acid, reduced ascorbic acid and dehydroascorbate in fresh cut ‘Selva’ strawberries (Fragariu x anana~~a Duch.) held for 7 days and ‘Fuyu’ persimmons (Diospyros kuki L.) held for 8 days at 5°C in air or controlled atmospheres were evaluated. Various atmospheres had significantly different effects on the color, pH, and titratable acidity of the fruits. The two f...

Stability of the total phenolic content, ascorbic acid, total carotenoids and antioxidant activity in eight fruit beverages was analyzed. The influence of storage temperature (4, 8 and 11 °C) during the product shelf-life (20 days) was evaluated. Pomegranate Juice presented the highest values for antioxidant activity by DPPH• assay (552.93 ± 6.00 GAE μg mL(-1)), total carotenoids (3.18 ± 0.11 β...

The importance of ascorbic acid for the metabolism of connective tissue substances, especially collagen, has been established by numerous investigators, using morphologic criteria (1). However, there have been few biochemical studies of this function of ascorbic acid with the exception of the recent analyses of Elster (2) and Robertson (3), which demonstrated that the maintenance of preformed c...

In the present work, hydrogels based on acrylamide (AAm) and acrylic acid (AAc), crosslinked with N,N’-methylenebisacrylamide (MBAAm) were prepared by free radical polymerization in solution. The effect of initial AAm/AAc mole ratio and nominal crosslinking ratio (moles of crosslinking agent/moles of polymer repeat unit) on the dynamic and equilibrium swelling behaviour of hydrogels was investi...

The importance of ascorbic acid for the metabolism of connective tissue substances, especially collagen, has been established by numerous investigators, using morphologic criteria (1). However, there have been few biochemical studies of this function of ascorbic acid with the exception of the recent analyses of Elster (2) and Robertson (3), which demonstrated that the maintenance of preformed c...

Neuroblastoma cells accumulate ascorbic acid and iron. It was hypothesized that these features could be exploited for sensitizing neuroblastoma cells for therapy in combination with reactive oxygen intermediates. In the present study the effects of 6-hydroxydopamine (6-OHDA) and H2O2 on metabolic parameters critical for cell survival were investigated in cells with low and high ferritin content...

Activity of xanthine oxidase, levels of lipid peroxidation and ascorbic acid were studied in African land snail (Achatina marginatus) from two sites with different pollution potentials. Lipid peroxidation was significantly higher in the snails from the polluted site compared to the value obtained from the same species from the control site. Similarly, the activity of xanthine oxidase in the sna...

Many instances of a close relationship between folic acid and ascorbic acid have been reported in the literature. Johnson and Dana (1) have shown that ascorbic acid relieves many of the abnormalities noted in a folic acid deficiency syndrome. Woodruff and Darby (2) have reported that folic acid aids in correcting the abnormal tyrosine metabolism of the scorbutic guinea pig. Nichol and Welch (3,...

storage of potatoes is very important because fresh potatoes are available only for a few months in a year. thus, any treatment such as irradiation that controls sprout growth and extends shelf life of potatoes could be beneficial. in this study, potato sprout inhibition and tuber quality after treatment with various levels of gamma irradiation (0, 50, 100 and 150 gy) on different dates (10, 30...