We study a setting in which firms produce items whose quality is ex-ante unobservable, but learned by customers over time. Firms take customer learning into account when making production decisions. We focus on the effect that the review process has on product quality. Specifically, we compare equilibrium quality levels in the setting described above to the quality that would be produced if cus...

Background and Objective: Lead entry into the body causes considerable damages to the brain in the long term. We aimed to investigate the effects of exercise (treadmill running) and flaxseed oil on lead acetate-induced behavioral deficits in male rats.  Materials and Methods: 60 rats were divided into 6 groups: Control (C), Exercise (Ex), Flaxseed oil (FO), Lead (L), Lead- Exercise (L-Ex), and...

solution potassium (so-k) and exchangeable k (ex-k) extracted by nh4oac are the major sources of potassium used by plants, but initially non-exchangeable k (nex-k) can also contribute significantly to plant uptake. perennial ryegrass (lolium perenne, cv. roper) was successively planted in ten surface soil samples with different clay mineralogical composition belonging to five soil types to dete...

Background: Anabolic-androgenic steroids are used at high doses by athletes for improving athletic ability, physical appearance and muscle mass. Unfortunately, the abuse of these agents has significantly increased. It has been established that exercise and high doses of anabolic-androgenic steroids may influence the hypothalamic- pituitary-testis axis, which can in turn affect testicular apopto...