the etiopathogenesis of dementia in alzheimer's disease (ad) is still unclear. however, long-term oxidative stress is believed to be one of the major contributing factors in progression of neuronal degeneration and decline of cognitive function in ad. in order to assess the presence of oxidative stress in ad, we examined the enzymatic activities of the erythrocyte cu-zn superoxide dismutase (cu...

background & aim: strawberry (fragaria vesca l.) is a plant belonging to the rosaceae family with medicinal properties, including antioxidant activity. the present study aimed at investigating the antioxidant properties of strawberry. experimental method: to examine the antioxidant effect, fruit extracts at two phonological stages of growth (ripe and unripe strawberry) were prepared. in add...

Various extracts of local marine red algae, Acanthophora spicifera were evaluated for antioxidant activity, total phenolic content and in-vitro toxicity. The antioxidant activity was measured using DPPH (1, 1-diphenyl-2-picrylhidrazyl) method, while Folin-Ciocalteu method was used for the total phenolic content. The cytotoxicity of the extracts were evaluated using invitro brine shrimp lethalit...

background & aim: applications of synthetic antioxidant in food have side effects. in present study, the antioxidant potential of morus alba leaves, as natural antioxidant, was screened with cupric ion reducing assay (cuprac assay) and inhibition of lipid peroxidation. the aim of this study was to determine the total antioxidant activity of morus alba leaves. martial & methods: the fir...

background: oxidation of lipids causes reduction of different properties of products that contains lipids. nowadays, there is a growing demand for the natural antioxidants due to the harmful effects of synthetic antioxidants such as bha, bht and tbhq. objective: in this study, extract of aerial parts of echinacea purpurea l. was used instead of synthetic antioxidants in cake then, antioxidant a...

abstract: in this study, response surface methodology was used to optimize ultrasound osmotic pretreatment with finished freeze drying of black cherries. freeze drying is a separation process based on the  sublimation phenomenon. this process has the following advantages as compared to the conventional drying process, maintenance of the structure, moisture removal at low temperature (reduced tr...

Aim of this paper is to find out the relationship between antioxidant activity of Abutilon indicum Linn and their phytochemical composition especially phenols and flavonols. Successive extractions were carried out for the Abutilon indicum plant with petroleum ether, chloroform, ethyl acetate, n-butanol, ethanol and water. All these extracts were evaluated for their antioxidant activities. Their...

The influence of harvesting date on some physicochemical properties of nectarine (Prunus persica var. Red gold) fruit including fruit weight, pigment content, total carbohydrate, total phenol and antioxidant activity were studied. Fruits were harvested in four different stages; a) two weeks after fruit set, b) pit hardening, c) three weeks after pit hardening and 6 weeks after pit hardening. Re...

Background & Aim:Extracts of Roselle calyx,   possess compounds which could be considered as a great source of natural antioxidants.   In this project, antioxidant activities, phenolic compounds content and their   correlation analysis on calices of Roselle (Hibiscus sabdariffa) was investigated.  Experimental: Total polyphenolic compound, flavonoids and anthoc...