Da Fama Ao Ostracismo: Oito Reagentes Que Deixaram O Ambiente Laboratorial

Abstract

FROM FAME TO OSTRACISM: EIGHT REAGENTS THAT LEFT THE LABORATORY ENVIRONMENT. Historical aspects related to eight reagents that were present in analytical chemistry laboratories in the first decades of the twentieth century are described. They have peculiarities that are based on their curious names or the purposes for which they were intended. Their presence in the laboratory environment reflected their industrial applications and the chemical analysis procedures used at that time. From the mid XXth century, with the migration of qualitative analysis to the chemistry teaching, these reagents have been replaced by others that today serve the same purposes as those previously used. However, many of them still retain their industrial importance. This historical overview emphasizes the importance of the evolution of chemicals and chemical assays for security and efficiency reasons. Learning from past experiences develops a critical spirit and laboratory behavior more committed to occupational hygiene and safety, without losing sight the learning power that qualitative analytical chemistry offers.

Pyroligneous extracts with therapeutic action: A technological prospect

“…The growing concern in the creation of chemotherapeutic drugs has led to the creation of formulations of new antimicrobial agents. In this context, the use of organic acids, substances Despite the significant increase in deposits of healthoriented technologies in the last year, pyroligneous extracts still lack research aimed at exploring their therapeutic potential, the need for standardization in obtaining these extracts and the elaboration of protocols for quality control are fundamental for research that seeks to patent the pharmacological action of a given compound (Paulino, Afonso, 2021).…”