Catechins, the dietary phytochemicals present in green tea and other beverages, are considered to be potent inducers of apoptosis and cytotoxicity to cancer cells. While it is believed that the antioxidant properties of catechins and related dietary agents may contribute to lowering the risk of cancer induction by impeding oxidative injury to DNA, these properties cannot account for apoptosis i...

aim: we conducted this study to investigate the role of ramadan fasting on oxidative stress. materials and method: 23 people (16 male, 7 female) aged between 25 and 65 years were recruited in this study. 10cc venous blood samples were taken after 8- to 10- hours fasting on 2 different times: a week before ramadan and at the end of ramadan (day 27). portions of the serum samples were used immedi...

background & aim: the most common primary brain tumors of the central nervous system are gliomas. among a number of different biomolecular events, a strong relation between oxidative stress pathways and the development of this cancer has been proved. oxidative stress (os) is the consequence of an imbalance between pro-oxidants and antioxidants towards pro-oxidants. the pro-oxidants cause lipid ...

objective(s) comparison of prooxidant-antioxidant balance (pab) assay with crocin assay. materials and methods twenty eight serum samples were chosen, pab and the total antioxidant capacity were measured by pab assay and crocin, respectively, and the correlation of both assays, along with their correlation with other clinical and biochemical parameters, were determined. results a significant ne...

Aim: we conducted this study to investigate the role of Ramadan fasting on oxidative stress. Materials and method: 23 people (16 male, 7 female) aged between 25 and 65 years were recruited in this study. 10cc Venous blood samples were taken after 8- to 10- hours fasting on 2 different times: a week before Ramadan and at the end of Ramadan (day 27). Portions of the serum samples were used immedi...

Natural flavonoids such as quercetin, (+)catechin and rutin as well as four methoxylated derivatives of quercetin used as models were investigated to elucidate their impact on the oxidant and antioxidant status of human red blood cells (RBCs). The impact of these compounds against metal toxicity was studied as well as their antiradical activities with DPPH assay. Antihemolytic experiments were ...

The paper presents results of research on effects long term continuous animals exposure to multi-frequency electromagnetic fields the mobile communication standards (GSM, UMTS and LTE). Prooxidant antioxidant activity was investigated in blood exposed Wistar rats. were continuously at frequencies 1800, 2100 2600 MHz with total power density 250 muW/cm2 (GSM-20%; UMTS-20%; LTE-60%). Peripheral s...

Both ascorbic acid and copper were strong prooxidants in the oxidation of linoleate in a buffered (pH 7.0) aqueous dispersion at 37 degrees C. Minimum concentrations at which catalytic activity was detected were 1.3 x 10(-7) m for copper and 1.8 x 10(-6) m for ascorbic acid. For concentrations up to 10(-3) m, the increase in rate of oxidation with increase in concentration of catalyst was great...