Aged Laborforce Population and Longevity-Rate

Physical performance and longevity in aged rats.

In humans, physical performance declines with increasing age, and in nondisabled older persons, scores on standardized performance measures, such as walking speed, repeated chair stands, and a balance test, predict the incidence of disability and reduced longevity. Here we show in aged rats (24-month-old Brown Norway x Fischer 344 male rats; n = 48) that conceptually similar performance measure...

Bifenthrin longevity at the termiticidal application rate.

BACKGROUND The longevity, mobility and insecticidal activity of bifenthrin at the termiticidal application rate for perimeter treatment were investigated in packed-soil columns in the laboratory and greenhouse. RESULTS Bifenthrin was not detected in the eluates of packed-soil cones over a period of 6 months. In larger pipe plots incorporating bifenthrin into the top 15 cm of the soil, the com...

What determines longevity: Metabolic rate or stability?

Extract: The conventional wisdom about why species age and live as long as they do is based in part on the modern version of the very old and now discredited "rate of living" (ROL) theory of aging. According to the old ROL theory, aging is caused by the loss of some vital substance such as water or hormones - the more rapid the vital substance is used up the shorter the lifespan. The modern and...

Resting metabolic rate and respiratory quotient in human longevity.

Significant changes in body composition, body fat distribution, and resting metabolic rate (RMR) occur with aging. Interestingly, studies on human longevity pointed out that long-lived subjects are less prone to the anthropometrics and metabolic derangement normally observed in the elderly. Indeed, the relationship between energy expenditure and longevity has been poorly investigated. Thus, ene...

Environment and Longevity: The Demography of the Growth Rate