Different types of characters fulfill different roles in the narrative process, and with a little bit of analysis, you can usually detect some or all of the types below. Major or central characters are vital to the development and resolution of the conflict.
Confidence votes 17. An organic acid is an acid that contains covalent bonds between carbon and hydrogen. All organic acids are weak. An inorganic acid is one that does not meet the above criterion. Most inorganic acids are also weak but a few are strong. Inorganic acids can also be called mineral acids.
Essential amino acid. An essential amino acid or indispensable amino acid is an amino acid that cannot be synthesized de novo (from scratch) by the organism, and thus must be supplied in its diet.