Affiliation: | 1.Department of Chemistry, Federal University of Santa Maria, 97.105-900, Santa Maria, RS, Brazil ;2.Department of Biology, Federal University of Santa Maria, 97.105-900, Santa Maria, RS, Brazil ;3.Arizona State University, Tempe, AZ, 480-965-2100, USA ;4.Institute of Chemistry, Federal University of Rio Grande do Sul, 91.501-970, Porto Alegre, RS, Brazil ; |