Encontrados 18 documentos, a visualizar página 1 de 2
Da leitura à escrita : texto expositivo
Silva, Maria Fátima Neves daProjeto de intervênção apresentado à Escola Superior de Educação para a obtenção do grau de mestre em Didática da Língua Portuguesa em 1º e 2º Ciclos do Ensino Básico ; Ler e escrever texto expositivo são competências essenciais que as crianças necessitam de conquistar nos primeiro e segundo ciclos. O presente estudo pretende contribuir para o desenvolvimento de estratégias que deem resposta a esta necessidade...
Visual processing mechanisms within magno, konio and parvocellular systems : im...
Silva, Maria Fátima Loureiro daPretendemos compreender novos aspectos da biofísica das vias de processamento da informação visual no Homem, na saúde e na doença. Introduzimos uma abordagem inovadora de biologia quantitativa baseada no desenvolvimento de métodos biofísicos de estudo da função neurosensorial que permitem isolar o funcionamento de vias paralelas de processamento de forma psicofísica. A questão de fundo é compreender de que form...
Atividade inseticida dos frutos de Trichilia claussenii (Meliaceae) sobre Spodo...
Nebo,Liliane; Matos,Andréia Pereira; Vieira,Paulo Cezar; Fernandes,João Batista; Silva,Maria Fátima das Graças Fernandes da; Rodrigues,Ricardo RibeiroAn evaluation of the insecticidal activity of the fruits extracts of Trichilia claussenii was carried out and the methanol extract revealed to have strong insecticidal activity. The fractionation of methanol extract of T. claussenii seeds bioassay-guided against Spodoptera frugiperda has led to the identification of the ω-phenylalkyl and alkenyl fatty acids as active compounds in this extract. The structur...
Interespecific variation in the composition of volatile oils from the leaves of...
Soares,Marisi Gomes; Silva,Maria Fátima das G. F. da; Fernandes,João Batista; Lago,João Henrique G.The volatile oils from leaves of five Brazilian specimens of Swietenia macrophylla King (Meliaceae) collected in three different Amazon Rainforest Conservation Areas in the States of Mato Grosso, Pará, and Rondônia were extracted and analyzed by GC and GC/MS. The oils showed to be composed by terpenoids, majority hydrocarbon sesquiterpenes, being germacrene D (20.5-46.8%) and bicyclogermacrene (8.3-11.1%) the m...
Uso de CLAE no controle de qualidade em produtos comerciais de Nim: reprodutibi...
Forim,Moacir Rossi; Matos,Andréia Pereira; Silva,Maria Fátima das Graças Fernandes da; Cass,Quézia Bezerra; Vieira,Paulo Cezar; Fernandes,João BatistaThe Neem tree, Azadirachta indica, provides many useful compounds that are used as pesticides. However, the efficiency in field of products like neem oil can be committed because they have not been observed reproductive content of secondary metabolic like azadirachtin. Based on reverse-phase high-performance liquid chromatography (HPLC) a new method was developed to permit the rapid quantitative analysis of aza...
Constituintes químicos e atividade antimicrobiana dos extratos de Dilodendron b...
Santos,Josiane Cristina dos; Oliveira,Carlos Alberto Nastally de; Varella,Larissa; Matos,Andréia Pereira; Terezan,Ana Paula; Leite,Ana CristinaThe phytochemical investigation of ethanolic extracts from leaves, branches and stems of D. bipinnatum afforded the steroids β-sitosterol, stigmasterol, campesterol, sitostenone and sitosterol-3-O-β-D-glycopyranoside, along with two cycloartane triterpenes: cycloeucalenol and 24-methylenecycloartenol. The antimicrobial activity of the extracts was evaluated against Staphylococcus aureus (ATCC 25923), ...
Cumarinas e alcaloides de Rauia resinosa (rutaceae)
Albarici,Tatiane Regina; Vieira,Paulo Cezar; Fernandes,João Batista; Silva,Maria Fátima das Graças Fernandes da; Pirani,José RubensThe genus Rauia, that is poorly chemically studied, belongs to the Rutaceae family. This family has been known to contain a large variety of secondary metabolites. Our phytochemical investigation of the stem and leaves of Rauia resinosa has led to the identification of the structurally related coumarins: murralongin (1), murrangatin (2), munomicrolin (3), murrangatin diacetate (4), umbelliferone (5), rauianin (...
Constituintes químicos e atividade inseticida dos extratos de frutos de Trichil...
Matos,Andréia Pereira; Nebo,Liliane; Vieira,Paulo Cezar; Fernandes,João Batista; Silva,Maria Fátima das Graças Fernandes da; Rodrigues,Ricardo RibeiroPhytochemical investigation of the fruits extracts of Trichilia elegans and Trichilia catigua (Meliaceae) has led to the identification of the limonoids 11β-acetoxyobacunone, cedrelone, methylangolensate and epimeric mixture of photogedunin besides known coumarins (scoparone, scopoletin, umbeliferone) and the steroids stigmasterol, β-sitosterol, sitostenone and campesterol. The structures of the compo...
Alcaloides β-indolopiridoquinazolínicos de Esenbeckia grandiflora mart. (R...
Januário,Ana Helena; Vieira,Paulo Cezar; Silva,Maria Fátima das Graças Fernandes da; Fernandes,João Batista; Silva,Jorge José de BritoThe chemical composition of two specimens of Esenbeckia grandiflora, collected in the south and northeast regions of Brazil, was investigated. In this study, three β-indolopyridoquinazoline alkaloids from the leaves (rutaecarpine, 1-hydroxyrutaecarpine) and roots (euxylophoricine D) were isolated for the first time in this genus. In addition, the triterpenes α-amyrin, β-amyrin, α-amyrenonol,...
Screening of Trypanosoma cruzi glycosomal glyceraldehyde-3-phosphate dehydrogen...
Leite,Ana C.; Ambrozin,Alessandra R. P.; Castilho,Marcelo S.; Vieira,Paulo C.; Fernandes,João B.; Oliva,Glaucius; Silva,Maria Fátima das G. F. daThe inhibitory activity of crude extracts of Meliaceae and Rutaceae plants on glycosomal glyceraldehyde-3-phosphate dehydrogenase (gGAPDH) enzyme from Trypanosoma cruzi was evaluated at 100 μg/mL. Forty-six extracts were tested and fifteen of them showed significant inhibitory activity (IA % > 50). The majority of the assayed extracts of Meliaceae plants (Cedrela fissilis, Cipadessa fruticosa and Trichilia...
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