Bomb pulse radiocarbon dating
The difference between the date estimated using the Calibomb software and sampling date varied between −3 ± 0.4 and 0.2 ± 0.5 years.The average age deviation of all samples was −1.5 ± 0.7 years, with the delay between production and consumption of foodstuffs being probably the dominating cause.The potential influence of food habits on the N analysis and information about the dietary habits of the investigated individuals.Although the group consisting of lacto-ovo vegetarians and vegans (pooled group) was not completely separated from the omnivores in a stable isotopic trophic level diagram, this analysis proved to add valuable information on probable dietary habits.The age deviation of the sampling date from the respective Calibomb date was found strongly correlated with the δC is naturally produced in the upper atmosphere, when nitrogen atoms of the air react with neutrons produced by cosmic rays.Nuclear weapons testing in the atmosphere in the 1950s and early 1960s produced large amounts of C produced in the atmosphere was mainly bound in carbon dioxide, the bomb pulse has been recorded in all parts of the biosphere.Thus, terrestrially living organisms from the second half of the twentieth century (see e.g.Harkness and Walton ) can be dated, in some cases with a precision down to ±1 year or even better.
Isotope fractionation is a process that occurs during chemical reactions and physical processes due to the difference in mass between the isotopes.
It represents a partial separation of the different isotopes and results in enrichment or depletion of one isotope relative to another (Gillespie photosynthetic pathway, on the other hand, followed, for example, by corn and sugar cane, is leading to a four-carbon molecule (oxaloacetate) as the intermediate product.
Finally, the Crassulacean acid metabolism (CAM) photosynthetic pathway is followed, for example, by tropical plants as pineapples and various cacti, only a few of which are included in herbivore and human diet (Farquhar et al.
) modeled the potential effect of the marine component of the diet on bomb-pulse dating of human tissue.
It was found that food originating from the marine environment could lead to a few years’ delay in radiocarbon dating compared to food of terrestrial origin.
In the current study, accelerator mass spectrometry (AMS) was used to date 60 human serum samples collected in 1978 from residents of the city of Malmö in southern Sweden.