None of the cases studied by us in this work presents quinoidal
character in the ground state; the BLA of the copolymer were similar to those of homopolymers, without abrupt changes between the comonomers and intermediate values to the parent homopolymers (see Fig.
da Silva Junior, "Synthesis of quinoidal
molecules: strategies towards bioactive compounds with an emphasis on lapachones," European Journal of Medicinal Chemistry, vol.
Com relacao a estabilidade das antocianinas, as mesmas se encontram comumente na forma de uma mistura de diferentes estruturas quimicas em equilibrio: cationflavilium (vermelho), base anidra quinoidal
(azul), pseudobase carbitol (incolor) e chalcona (incolor ou levemente amarela).
The great interest in its study, including the elucidation of mechanisms of action of compounds with quinoidal
structure is due to their multiple biological targets and their widespread presence in nature (Hussain et al.
A Reinvestigation of the quinoidal
effect in N-n-propyl-2-oxo-1-naphthylidene-methylmine, Acta Crystallogr.
This process of deterioration is mediated by endogenous enzymatic activities such as polyphenol oxidase (PPO) and peroxidase (POD), which leads to the formation of dark polymers of a quinoidal
nature (ESCRIBANO et al.