Antioxidant enzymes form the first line of defense against free radicals in organisms. Their
regulation depends mainly on the oxidant status of the cell, given that oxidants are their …

The discovery of melatonin and its derivatives as antioxidants has stimulated a very large
number of studies which have, virtually uniformly, documented the ability of these molecules …

We investigated the relationship between oxidative stress and poor oocyte quality and
whether the antioxidant melatonin improves oocyte quality. Follicular fluid was sampled at …

Significance: Oxygen and circadian rhythmicity are essential in a myriad of physiological
processes to maintain homeostasis, from blood pressure and sleep/wake cycles, down to …

OBJECTIVE: To summarize the role of melatonin in the physiology and pathophysiology of
the ovary. DESIGN: Review of literature. SETTING: University Health Science Center …

Endogenous circadian and exogenously driven daily rhythms of antioxidative enzyme
activities and of low molecular weight antioxidants (LMWAs) are described in various …

Melatonin may be ubiquitous in the plant kingdom. This review considers the evaluation of
methods of melatonin determination in plant material and possible melatonin functions in …

The present study investigated the antioxidant and neuroprotective effect of kaempferol
against rotenone-induced Parkinson's disease (PD). Kaempferol inhibits apomorphine …

It is becoming increasingly clear that the intrinsic properties of both the heart and
vasculature exhibit dramatic oscillations over the course of the day. Diurnal variations in the …

Migrating birds perform extraordinary endurance flights, up to 200 h non-stop, at a very high
metabolic rate and while fasting. Such an intense and prolonged physical activity is normally …