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A majority of laying hens fracture their keel bones during the laying cycle. It is not easy for a farmer to identify hens with fractures and hen survival rate seems high. Thus, the effect of both recent and healed fractures on bird welfare is unclear. We aimed to investigate the impact of these keel-bone fractures on hens’ production and behaviour. The egg(More)
Survival, mutagenesis and transformation were measured in mouse embryo C3H 10T 1/2 cells following treatment with ethyl methanesulfonate (EMS). Ouabain-resistant cells and transformed cells were isolated, and reconstruction experiments were carried out to determine the optimum conditions for the measurement of mutation and transformation frequencies.(More)
DNA methylation is a postreplicative modification thought to play a role in gene transcription in eucaryotes. Differences in the amount of 5-methylcytosine as a function of age and differentiation state have been reported. DNA isolated from human skin keratinocytes was analyzed for its 5-methylcytosine content. The 5-methylcytosine in DNA from neonatal and(More)
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