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The cerrado region from Maranhão State introduce an optimum floristic potential necessary for the implementation of meliponiculture. The tiúba honeys quality´s arising from the municipalities of Jenipapo dos Vieiras, Fernando Falcão, Barra do Corda and Riachão have been evaluated through the analysis of total coliforms, thermotolerant coliforms, insoluble solids and ashes. The time that tiúba honey has to be consumed was estimated to be 120 days, through of the physical-chemicals parameters of umidity, diastasic activity, hydroxymethylfurfural, pH, acidity, reducing sugars, apparent sucrose and through VillasBôas and Malaspina`s purpose in agreement with brazilian legislation for Apis mellifera honeys, considering the absence of a legislation for the meliponini honeys (stingless bees).
Dizygostemon riparius (Plantaginaceae) is a new aromatic herbaceous species occurring in Maranhão State, Brazil. It is used as flavorings to remove domestic animal parasites and preventing mosquitoes. GC and GC/MS were used to analyze its essential oil, and a larvicidal bioassay was performed against Aedes albopictus larvae, a vector of arboviruses in Brazil. endo-Fenchyl acetate, endo-fenchol, (E)-caryophyllene, and caryophyllene oxide were the oil's primary constituents, totalizing 88.0 %. The two morphotypes of D. riparius, with purple and white flowers, did not present a significant difference in the oils' composition. From a chemotaxonomic point of view, D. riparius oil showed some similarities with other oils of Plantaginaceae, suggesting (E)-caryophyllene and caryophyllene oxide as possible chemical markers. The oil larvicidal action displayed the lowest and highest mortality percentage at 50 mg/L (2.0 %) and 600 mg/L (88.0 %). The fenchyl acetate and fenchol standards showed a lower and higher mortality percentage at a concentration of 300 mg/L (42.0 % and 26.0 %) and 900 mg/L (96.0 % and 98.0 %), respectively. The present study results with the D. riparius oil point to a new bioproduct with significant larvicidal activity.
<span>A geração de resíduos químicos é inerente às atividades na área de química, contudo ao longo das últimas décadas na busca para equacionar esse problema a comunidade química vem mobilizando-se, a partir da aplicação dos 12 princípios da Química Verde, conscientes da necessidade de promover avanços científicos pautados na sustentabilidade. Responsabilidade ambiental esta, que reflete nossos valores e implica no aumento da segurança dos envolvidos nas práticas experimentais (docentes, técnicos e discentes), na economia de recursos, bem como da conformidade com a legislação ambiental em vigor, a exemplo da </span><span>NBR 10004:2004, da Política Nacional de Resíduos Sólidos instituída pela </span><span>Lei n<span style="text-decoration: underline;"><sup>o</sup></span><span> </span>12.305∕2010, além da aplicação da política dos 3R’s com o foco na redução de resíduos químicos. Buscamos para tanto, o suporte pedagógico das diretrizes da educação ambiental formal, assim a pesquisa avaliou a</span><span> percepção ambiental dos docentes do Departamento Acadêmico de Química do IFMA campus Monte Castelo ministrantes das disciplinas de cunho experimental nos cursos Técnico e Licenciatura em Química visando promover técnicas de minimização dos resíduos gerados nos laboratórios de ensino e pesquisa. E, utilizou-se a investigação documental analisando-se as matrizes curriculares dos cursos e roteiros de aulas experimentais, bem como <span>aplicação de </span></span><span>entrevistas via questionários semiestruturados, por fim a a</span><span>valiação dos resultados da pesquisa através de planilhas gráficas</span>.
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