Changing protocols surrounding euthanasia.
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Analysis of the incremental lines of human tooth cementum permits the chronological age-at-death diagnosis in skeletal finds. In addition, certain life history parameters, especially times of higher physiological calcium demand, should also manifest themselves in the cementum in the form of hypomineralized incremental lines. It has been shown previously that counting the incremental lines leads to a chronological age-at-death diagnosis more precise than the morphological age-at-death assessment, particularly in less well preserved skeletal finds. Both aspects were subject of this investigation of an underprivileged early modern human population.
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Water-holding stone vases were sampled in 4 central Florida cemeteries to compare the prevalence of mosquitoes in containers with and without metallic liners. Overall, immature mosquitoes were found in more than 60% of the vases lacking liners and in more than 50% of the vases with aluminum liners. Significantly fewer vases with copper liners were positive for mosquitoes. High mortality and a lack of development were observed in a field test involving the introduction of Aedes aegypti larvae into stone vases with copper liners.
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