Planten nemen deze licht radioactieve vorm van koolstof op via hun gaswisseling en bouwen deze in door hun fotosynthese en stofwisseling.
Hierdoor krijgen dieren die van die planten leven de isotoop binnen, en vervolgens weer dieren die van dieren leven, enzovoort.
Routine vitamin C supplementation does not reduce the incidence or severity of the common cold in the general population, though it may reduce the duration of illness; the authors of the Cochrane review concluded that given the low cost and safety "it may be worthwhile for common cold patients to test on an individual basis whether therapeutic vitamin C is beneficial." Relatively large doses of ascorbic acid may cause indigestion, particularly when taken on an empty stomach.
The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.Libby received the Nobel Prize in Chemistry for his work in 1960.A meta-analysis of 44 clinical trials has shown a significant positive effect of vitamin C on endothelial function when taken at doses greater than 500 mg per day.The researchers noted that the effect of vitamin C supplementation appeared to be dependent on health status, with stronger effects in those at higher cardiovascular disease risk. NET is a C#-based implementation of the Extended Date/Time Format (EDTF).
EDTF is a data model for dates and times that is based on a subset of ISO 8601 and is extended to cover use cases where some or all of a date is uncertain, approximate, or unknown.Don’t be a thief—save your grade, use Bib Me™ and give credit to those who deserve it!I never thought I'd do material about kids, but I started getting really stressed out and not sleeping a lot.Other corrections must be made to account for the proportion of throughout the biosphere (reservoir effects).Additional complications come from the burning of fossil fuels such as coal and oil, and from the above-ground nuclear tests done in the 1950s and 1960s.De methode is bruikbaar voor materialen tot circa 60.000 jaar oud.