A solution might be the cryogenic cooling of the specimen, because at 77 K the equilibrium pressure of MgH2 is reduced to 10−41 mbar, which is well below the hydrogen partial pressure of 10−10 mbar in the TEM.
First, we did not provide any specific morphologic criteria for the tissue specimens we studied because we were confident experienced orthopaedic surgeons would recognize an unusual, adverse reaction.
Largest specimens were selected because we reasoned that they were most representative of the healthy growth potential of the group.
Tail tips were taken in the field from subsequent specimens because at the time we did not know the species was introduced.
This particular specimen is unique because "we can clearly identify it as coming from a meat-eating dinosaur, and the only species of that type of dinosaur living in the area at the end of the Cretaceous Period that was large enough to produce this coprolite was Tyrannosaurus rex," paleontologist Harold Bryant, director of the Royal Saskatchewan Museum, explained in an official announcement.
A. Yes, but we need also to make sure we focus on the specimens, because that's the basis of a natural history museum.
We felt justified to include single specimens because fatty acid concentrations showed only little to moderate within-species variation (coefficients of variation for all fatty acid (classes) investigated ranged from 2.3% to 36.67%, overall mean: 15.68%).
We chose to compare only serum specimens because in different reports only slight differences are found between serum and plasma.
To reduce the computational burden during analyses we included a subset of 18 specimens, because individuals either shared identical mitochondrial haplotypes or were relatively weakly differentiated.
However, we used one specimen of each species, because we have not seen any evidence of doubly uniparental inheritance so far.
