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Aging And Exercise: A Health Perspective, Joanna L. Bokovoy, Steven N. Blair
Aging And Exercise: A Health Perspective, Joanna L. Bokovoy, Steven N. Blair
Faculty Publications
Habitual exercise provides protection against fatal coronary heart disease, extends longevity, and enhances quality of life. National surveys show less physical activity in older men and women compared with middle-aged and younger persons; older women are particularly sedentary. Although there are still few longitudinal studies on exercise and physical activity in older individuals, the data support a positive relationship between physical activity and health function in older individuals. The data further show that with regular physical activity, health and fitness are maintained or even increased over time in older individuals. Studies on physical activity requirements for beneficial health effects in …
Humic And Fulvic Acids: Sink Or Source In The Availability Of Metals To The Marine Bivalves Macoma Balthica And Potamocorbula Amurensis?, Alan W. Decho, Samuel N. Luoma
Humic And Fulvic Acids: Sink Or Source In The Availability Of Metals To The Marine Bivalves Macoma Balthica And Potamocorbula Amurensis?, Alan W. Decho, Samuel N. Luoma
Faculty Publications
Humic acids (HA) and fulvic acids (FA) are common forms of organic matter in marine sediments, and are routinely ingested by deposit- and suspension-feeding animals. These compounds may be a sink for metals, implying that once metals are bound to humic substances they are no longer available to food webs. A series of experiments was conducted to quantitatively examine this premise using 2 estuarine bivalves from San Francisco Bay, USA: the suspension feeder Potarnocorbula arnurensis and the facultative deposit feeder Macoma balthica. HA and FA, isolated from marine sediments, were bound as organic coatings to either hydrous ferric oxides …