The formula for antioxidants is very difficult to define, although they had been used in food for centuries. Antioxidants are compounds used to delay the accumulation of free radicals and strengthen the oxidative stability of food. According to the activity mechanism of antioxidants, they can act by means of many different processes. The properties of antioxidants are also the result of many fa...

The importance of molecules with antiradical potency that are produced in the human body has significantly increased. Among others, neurotransmitters and their metabolites act as the first line of defense against oxidative stress in the peripheral endocrine and the central nervous systems. Dopamine (DO), epinephrine (EP), norepinephrine (NE), l-DOPA, catechol, and three metabolites of dopamine ...

Paulownia tomentosa is a large indecidous tree planted mostly for its fast growing wood and decorative purposes. The tree is also used in traditional Chinese medicine. As a part of our study of natural polyphenols, the fruits of Paulownia tomentosa were extracted by EtOH and than subjected to liquid/liquid extraction. Fractions were analysed by TLC and HPLC to determine presence of phenolic sub...

The antiplatelet and antiradical activities of 8 dietary flavonoid phytochemicals were investigated and compared. Quercetin, rutin, isoquercitrin, hesperetin, naringenin, hesperidin, naringin and icariin inhibited ADP-induced rat platelet aggregation by 68.33±2.43%, 55.34±2.09%, 52.27± 4.65%, 50.80±7.03%, 33.07±2.09%, 31.28±4.65%, 22.91±1.68% and 20.94±3.20%, respectively. Only quercetin, rutin...

Antiradical activity and free radicals before after gamma-treatment of beebread were investigated by Electron Paramagnetic Resonance (EPR) spectroscopy. A narrow signal the intensity which increased with dose was assigned to O-centred induced gamma rays. They are stable for 120 days irradiation. The irradiation effect on antioxidant potential content phenolic compounds studied. It found that to...

BACKGROUND Among many sources of natural bioactive substances, mushrooms constitute a huge and almost unexplored group. Fungal compounds have been repeatedly reported to exert biological effects which have prompted their use in pharmaceutical and cosmetic industry. Therefore, the aim of this study was analysis of chemical composition and biological activity of 31 wild growing mushroom species (...