The radiological hazard of radon gas to occupants in residential environments is from the particulate progeny "'Po, ""Pb, ^Bi and "4P0, rather than ^Rn itself. Attachment to aerosols, plateout and resuspension impacts on the actual progeny airborne concentrations. Plateout rate factors are measured for different air change (ventilation) rates, ACH, in a 0.28 m3 test chamber for interior residen...

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Studies have shown that maternal chronic stress or depression is linked to an increased risk for affective disorders in progeny. However, the impact of maternal chronic stress before pregnancy on their progeny in animal models has not been well studied. We investigated the behaviors and the neurobiology in 60-day-old male progeny of maternal rats exposed to a 21-day chronic unpredictable stress...

the maintenance of the endangered caspian brown trout salmo trutta caspius populations in iran depends on its artificial breeding. there is no information on how current hatchery breeding protocol influences effective population size of breeders (ne), which is a critical parameter to maintain genetic diversity in future generations. the current hatchery protocol (chp) was comparatively evaluate...

A quasi-cyclicity associated with variability of environmental conditions is detected for the regression residuals stock-recruitment model chum salmon Oncorhynchus keta in Okhotsk district, described by Ricker’s equation. The main factors influenced on progeny abundance were number spawners and amount precipitation spawning grounds area certain months. mathematical has been developed that simul...

Abstract Two experiments were conducted to determine the impact of diets with yeast-based direct fed microbials (DFM) in nursery pigs weaned from sows lactation or without yeast additives. Treatment descriptions for both are reviewed Table 1. There was no evidence sow and treatment interactions either experiment (P > 0.05). In Exp. 1, 340 pigs, initially 5.1 kg ± 0.02, used evaluate prev...