Purines and pyrimidines are nitrogen bases found in DNA and RNA .They are nitrogen containing heterocyclic compounds .Purines are large double ringed while pyrimidines are sma â¦ ll single ringed .
Frozen Methane is exactly what it sounds like. Frozen methane. Or in other words, it's methane locked in ice, which is called hydrates. It is also known as fire ice, because of it's ice-like appearance and ability to burn when lit with a match. Frozen Methane is formed when a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.
The ground freezing process converts pore water into ice by the continuous circulation of a cryogenic fluid within a system of small diameter, closed-end pipes installed in a pattern consistent with the shape of the area to be treated. The frozen pore water acts as a bonding agent, fusing together particles of soil or rock to significantly increase