Using this method, the ages of mountain yellow-legged frogs (Rana muscosa) were studied, the phalanges of the toes showing seasonal lines where growth slows in winter.
Variations are brought by several factors, such as the cutoff, assay method, and the age of patients.
This method estimates the age of the Nothobranchius genus to be 8.3 (6.0 – 10.7) My and the separation of the four clades 4.8 (2.7-7.0 2.7-7.0
It could be concluded that the method of realising the age-of-air via CFD was reasonably well designed and capable of estimating ventilation efficiency of agricultural facilities under unsteady-state conditions.
These two studies used different methods, besides the age of the animals tested and the recording techniques employed, and so the differences in their findings remain controversial (see Discussion).
The mean of the estimates from all methods puts the age of LECA at ~1,130 Mya; the distribution of all estimates is shown in the Additional file 3.
Rhenium osmium dating, method of determining the age of the important ore mineral molybdenite; the method is based upon the radioactive decay of rhenium-187 to osmium-187.
The team next used a statistical method to calculate the age of the human jawbone.
Skeptical of both parties' tests, Elroy sought out Philippe Hubert, a French physicist who had devised a method of testing the age of wine without opening the bottle.
In 1905 he proposed that lead is the final decay product of uranium and two years later developed a method of determining the age of some rocks by measuring the ratio of lead and uranium.
