The free radical theory proposes that ageing is the cumulative result of oxidative damage to the cells and tissues of the body that arises primarily as a result of aerobic metabolism. Several lines of evidence have been used to support this hypothesis including the claims that: (1) variation in species life span is correlated with metabolic rate and protective antioxidant activity; (2) enhanced...

Anyone who has spent time in an American hospital must have noticed the abundance of free food. Whether breakfast at morning Grand Rounds, a drug representative teaching conference, or a potluck meal in the nursing lounge, free food is ubiquitous. Over the span of 2 decades, much work has been done in the bourgeoning fi eld of hospital medicine, but this subject has been starved of attention. I...

We study the linear span of commutators free random variables and show that these are only quadratic forms which satisfy following equivalent properties: preservation infinite divisibility, strong cancellation odd cumulants, symmetric distribution for any family.

In recent years, a number of memory span findings have been attributed to the operation of an articulatory loop (Baddeley & Hitch, 1974). These attributions have been made on the basis of finding a correspondence between span differences and pronunciation rate differences. This experiment explored articulatory loop explanations for two material effects in memory span: the word-frequency effect ...

On the basis of the free radical and rate of living theories of aging, it has been proposed that decreased metabolism leads to increased longevity through a decreased production of reactive oxygen species (ROS). In this article, we examine the relationship between mitochondrial energy metabolism and life span by using the Clk mutants in Caenorhabditis elegans. Clk mutants are characterized by s...