online) offers the first evidence that males of one species of spider undergo programmed death immediately following mating and consider the potential adaptive significance of such an unusual behaviour. The two researchers have been studying a species in the cannibalistic genus of orb-weaving spider, Argiope, where there has been some suggestion males may die after mating. But now the researche...

background: whether exposure to common electromagnetic fields affects human health adversely has been a controversial issue. the main goal of this study was to assess the role of 900 mhz microwave radiations with different specific absorption rates (sars), emitted from some widely used cell phones, on the induction of adaptive response in male balb/c mice after receiving a lethal dose of gamma ...

ANY lethal genes are concealed in heterozygous condition in natural popuMlations of Drosophila. The viability of lethal heterozygotes appears to be slightly (24%) inferior to that of normal heterozygotes (STERN et al. 1952; HIRAIZUMI and CROW 1960) and lethal genes should be selected out from a population sooner or later. However, some lethal genes have been maintained from generation to genera...

The battle for whale conservation is intensifying ahead of a key meeting in June.

Background: Whether exposure to common electromagnetic fields affects human health adversely has been a controversial issue. The main goal of this study was to assess the role of 900 MHz microwave radiations with different specific absorption rates (SARs), emitted from some widely used cell phones, on the induction of adaptive response in male Balb/c mice after receiving a lethal dose of gamma ...

In this study, lethal concentration (LC50) values of cinnamon hydrosol (Cinnamomum zeylanicum) on carp (Cyprinus carpio) were investigated. In practice, experimental setup was constituted 30 fish (a total of 180 fish with 30 control fish) to be placed in three replicates. Hydrosol was added into aquariums at the doses of 0.5, 1, 2.5, 5 and 10% and determined mortality times of carp exposed to t...