Populations change as preexisting variation allows specimens with certain favorable characteristics to produce more offspring than those with less favorable characteristics.
Constant flow of media allowed specimens to remain alive for several hours at room temperature (21 °C).
So, no one who is like me will allow specimens to be taken from her child's dead body.
He believed that this kind of resource would make families and religious leaders more comfortable with making decisions about whether or not to allow specimens to be collected.
Cells were then infiltrated with graded mixtures of propylene oxide/Spurr's resin, and embedded in the same resin, allowing specimens to polymerize at 70°C for 8 h.
We hypothesized that the diluted nature of the swab specimens that we regularly analyze, along with the typical lack of any gross contamination of the viral transport buffers would allow specimens to be analyzed directly by PCR.
Sections were infiltrated with graded mixtures of propylene oxide (Sigma, Milan, Italy; 45345) and Epon812 (TAAB Laboratories, Berkshire, UK; T031), then flat-embedded in the same resin, allowing specimens to polymerize at 60 °C, for 3 days.
This allowed specimens to be scored with these characters based only on a dorsal-view photograph, irrespective of light source or camera settings, and without need of a scale bar.
This variation could present a barrier to collaboration if, for example, an IRB at one project site would allow specimens to be de-identified and re-used without obtaining new consent from the donors while another would require donors to give consent for each new use.
