nitrogen base การใช้

• "' 5-Hydroxymethylcytosine "'is a DNA pyrimidine nitrogen base derived from cytosine.
• Further rounds of replication'fix'the change by incorporating a normal nitrogen base into the complementary strand.
• In 1901, Linde began work on a technique to obtain pure oxygen and nitrogen based on the fractional distillation of liquefied air.
• Groups of precipitated electrons can change the shape and conductivity of the ionosphere by colliding with atoms or molecules ( usually oxygen or nitrogen based particles ) in the region.
• Also there are theoretical reasons for expecting alien organic life to use nitrogen, as the weaker nitrogen based amide bonds are essential for the processes by which DNA is replicated.
• It has been observed that the doubling time of this yeast is approximately 3 hours at 23 癈 in yeast nitrogen base broth containing 20 % ( w / v ) fructose ( pH 4.0 ).