However, only A. tabida paid their higher fecundity by a lower longevity. The absence of a clear trade-off between these traits in L. heterotoma may be explained by a lower metabolic rate in southern populations. These results highlight the importance of the community change over climate in the evolution of life-history traits in this parasitoid community. (c) 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, 107, 153-165.”
“The present study
VRT752271 examined the effects of paradoxical sleep (PS) deprivation on the oxidative stress parameters: lipid peroxidation, superoxide dismutase, glutathione peroxidase, and glutathione in brain regions: cerebral cortex, striatum, hippocampus, thalamus, hypothalamus, AZD6094 price and brain stem of adult (8 months) and old (24 months) rats. PS deprivation
(96 h) was performed by the classical flower pot technique. PS deprivation did not affect oxidative stress parameters in the striatum of both age groups; and the activity of glutathione peroxidase was not affected in any of the studied brain regions in both age groups. PS deprivation decreased the levels of glutathione only in the hippocampus, thalamus and hypothalamus; the magnitude of decrease was higher in the old than in the adult age group. PS deprivation increased the superoxide dismutase activity in the cerebral cortex and brain stem but reduced it in the hippocampus, thalamus and hypothalamus in both age groups. Increases in the
activity were greater in adult animals than in old ones; the decline in the activity was greater in the hippocampus of old animals than in that of the adult ones. Lipid peroxidation was reduced by PS deprivation in the cerebral cortex and brain stem but was elevated in the hypothalamus and thalamus: the magnitude of alteration in the cerebral cortex, brain stem, hippocampus GS-7977 in vivo and hypothalamus was higher in adult animals than in old ones. The results showed that oxidative stress was not uniformly affected in all the brain regions. The cerebral cortex and brain stem showed a fall in oxidative stress after PS deprivation; the fall was greater in the adult than in the old animals. However, the oxidative stress was elevated in the hippocampus, thalamus and hypothalamus, and old animals were more severely affected than the adult ones.”
“We studied changes in cell cycle and apoptosis in normal keratinocytes and melanocytes after exposure to UV-B radiation. UV-B radiation modulated proliferation rate in the studied cell and produced an apoptosis-modulating effect in epidermal melanocytes.”
“We demonstrate that the poly(butyl acrylate) (PBA) elastomers containing considerable amounts of dangling chains with uniform lengths exhibit pronounced viscoelastic relaxation (tan delta > 1) at characteristic frequencies.