When the total pressure is considered, as in chemical analysis and in thermodynamics it is often referred to as psia or absolute pressure of the substance or of the fluid which would then include the atmospheric pressure. It is important to include the subscript g or a to define which pressure is being noted. Psi can also be the difference between two pressures, be they gage or absolute. Psi is also used in materials engineering referring to the unit stress caused when a load is imposed on a structure or on a part.
Adenine is one of the two purine nucleobases (the other being guanine) used in forming nucleotides of the nucleic acids. In DNA, adenine binds to thymine via two hydrogen bonds to assist in stabilizing the nucleic acid structures. In RNA, which is used for protein synthesis, adenine binds to uracil.
Adenine is one of the four bases found in both DNA and RNA. These four bases are necessary for life. Adenine base pairs with thymine in DNA and uracil in RNA.These bases are â¦ called nitrogenous bases.denine is a purine derivative and one of the four constituent  bases of nucleic acids. Its chemical formula is C5H5N5. Edit. Share to: 1  5 Popular Protein Skimmer Reviews A protein skimmer is a device that filters microorganisms from the water in an aquarium.