2 documents found, page 1 of 1
Arsenic and trace metals in river water and sediments from the southeast portio...
Varejão, Eduardo V. V.; Bellato, Carlos R.; Fontes, Maurício P. F.; Mello, Jaime W. V.The Iron Quadrangle has been one of the most important gold production regions in Brazil since the end of the seventeenth century. There, arsenic occurs in close association with sulfide-rich auriferous rocks. The most abundant sulfide minerals are pyrite and arsenopyrite, yet trace metal sulfides occur in subordinate phases as well. Historical mining activities have been responsible for the release of As and t...
Benzocaine complexation with p-sulfonic acid calix[n]arene: experimental (1 H-N...
Arantes, Lucas M.; Varejão, Eduardo V. V.; Pelizzaro-Rocha, Karin J.; Cereda, Cíntia M. S.; Paula, Eneida de; Lourenço, Maicon P.; Duarte, Hélio A.The aim of this work was to study the interaction between the local anesthetic benzocaine and p-sulfonic acid calix[n]arenes using NMR and theoretical calculations and to assess the effects of complexation on cytotoxicity of benzocaine. The architectures of the complexes were proposed according to (1) H NMR data (Job plot, binding constants, and ROESY) indicating details on the insertion of benzocaine in the ca...