The genus Cedrela P. Browne, which belongs to the Meliaceae family, has eighteen species. Trees of this genus are of economic interest due to wood quality, as well as being the focus of studies because of relevant biologic activities as in other Meliaceae species. These activities are mainly related to limonoids, a characteristic class of compounds in this family. Therefore, the aim of this review is to perform a survey of the citations in the literature on the Cedrela genus species. Articles were found on quantitative and qualitative phytochemical studies of the Cedrela species, revealing the chemical compounds identified, such as aliphatics acid and alcohol, flavonoids, tocopherol, monoterpenes, sesquiterpenes, triterpenes, cycloartanes, steroids, and limonoids. Although some activities were tested, the majority of studies focused on the insecticidal, antifeedant, or insect growth inhibitor activities of this genus. Nonetheless, the most promising activities were related to their antimalarial and antitripanocidal effects, although further investigations are still needed.
Abstract:One novel triterpene cycloartane-type, named hirtinone (1), six protolimonoidsnilocitin (2), dihydronilocitin B (3), melianone epimers (4) and (5), piscidinol A (6) and melianone lactone (7), one tertranortriterpenoid, hirtin (8), and one sesquiterpene, spathulenol (9), were identified in the fruits of Trichilia hirta. The structures were established by 1D and 2D NMR (
A atividade pesqueira brasileira gera um PIB de R$ 5 bilhõese mobiliza 800 mil profissionais. Em função desta atividade econômica, o descarte de resíduos de crustáceos sem nenhum tratamento tem se tornado um problema ambiental, uma proposta para minimiza-lo é a utilização destes resíduos para a obtenção de matéria prima de interesse industrial. Sendo assim, foi avaliado o efeito da concentração do NaOH no processo de obtenção da quitosana. Com base na utilização de materiais comuns de laboratório, a obtenção da quitosana foi realizada a partir da algumas etapas, como a desacetilação da quitina. Esta proposta demonstrou-se eficiente uma vez que o aumento no teor de NaOH promoveu um aumento no rendimento na produção da quitosana. Acredita-se que este trabalho venha a contribuir com a redução de resíduos de crustáceos, visto que o interesse industrial pela quitosana vem aumentando devido as suas propriedades bacteriostáticas, fungistática e cicatrizantes.
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