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Mostrando 1-12 de 196 artigos, teses e dissertações.
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1. Morphological, phytochemical and anti-hyperglycemic evaluation of Brachychiton populneus
Abstract Brachychiton populneus (Schott & Endl.) R.Br., Malvaceae, is one of five Brachychiton species cultivated in Egypt. Little information was found concerning the morphological, phytochemical and biological investigations of B. populneus. Morphological investigations of B. populneus were performed on fresh and dried leaves. Air-dried, ground leafy branc
Rev. bras. farmacogn.. Publicado em: 09/12/2019
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2. Crescimento e partição de massa seca em plantas jovens de amburana (Amburana cearensis (Fr. All.) AC Smith) e de umbuzeiro (Spondias tuberosa Arr. Cam.)
Resumo As espécies amburana (Amburana cearensis (Fr. All.) A. C. Smith) e o umbuzeiro (Spondias tuberosa Arr. Cam.) possuem adaptações fisiológicas e morfológicas às condições climáticas do bioma caatinga e atualmente estão sob ameaça de extinção. Objetivou-se com a realização deste trabalho caracterizar a partição de fotoassimilados das mud
Ciênc. Florest.. Publicado em: 02/12/2019
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3. TOXICITY OF ALKALOID FRACTIONS FROM Psychotria spp. (RUBIACEAE) AGAINST Atta sexdens FOREL, 1908 (HYMENOPTERA: FORMICIDAE)
ABSTRACT Leaf-cutting ants are the main pests in forest plantations. The most commonly used chemical control for the ants is toxic bait. However, the active ingredients in these baits have been restricted by forest certification organizations, justifying the search for new active compounds to control these insects. Thus, this work aimed to evaluate the formi
CERNE. Publicado em: 09/09/2019
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4. Presença franciscana e supremacia jesuítica no campo da história e da história da educação na época colonial - um diagnóstico na pesquisa historiográfica a partir da análise dos CBHE da SBHE
Resumo: A análise dos anais das nove edições dos Congressos Brasileiros de História da Educação (CBHE) da Sociedade Brasileira de História da Educação (SBHE), após 20 anos de existência, fez-nos concluir que um número diminuto de pesquisas tematizou o período colonial brasileiro: apenas 26 trabalhos. A quase totalidade desses trabalhos versava c
Rev. Bras. Hist. Educ.. Publicado em: 29/07/2019
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5. PROCESSO DE SIGNIFICAÇÃO NO TRABALHO PARA TRABALHADORES ARTESANAIS ATUANDO EM UMA CAPITAL DO NORDESTE BRASILEIRO
RESUMO O objetivo desta investigação é contribuir para uma compreensão do processo de significação no trabalho para trabalhadores artesanais em uma capital do Nordeste brasileiro. Tal processo é definido como a articulação entre significados e sentidos mediados pela atividade concreta. Participaram 20 artesãos atuando em distintos ramos da atividad
Psicol. Soc.. Publicado em: 15/07/2019
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6. Zika Virus Activity of the Leaf and Branch Extracts of Tontelea micrantha and Its Hexane Extracts Phytochemical Study
The new triterpene friedelan-1,3,21-trione, the known compounds friedelan-3-one, 3β-friedelinol, 3,4-seco-friedelan-3-oic acid, 28-hydroxyfriedelan-3-one, friedelan-3-oxo-28-al, friedelan-3,21-dione, 30-hydroxyfriedelan-3-one, a mixture of 30-hydroxyfriedelan-3-one/21α-hydroxyfriedelan-3-one, 21β-hydroxyfriedelan-3-one, gutta-percha, squalene, and a mixtu
J. Braz. Chem. Soc.. Publicado em: 2019-04
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7. Reduccionismo Didáctico y Creencias de Profesores acerca del Teorema de Pitágoras
Abstract In this paper, we report the results of an exploratory research in which the interest was to identify how beliefs that support teachers in service about the Pythagorean Theorem are indicators of a didactical reductionism on this mathematical result. Questionnaires were applied to five public high school mathematics teachers and a semi-structured int
Bolema. Publicado em: 2017-12
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8. Antidiarrheal activity of extracts from Maytenus gonoclada and inhibition of Dengue virus by lupeol
ABSTRACT Diarrhea is an infectious disease caused by bacterial, virus, or protozoan, and dengue is caused by virus, included among the neglected diseases in several underdeveloped and developing countries, with an urgent demand for new drugs. Considering the antidiarrheal potential of species of Maytenus genus, a phytochemical investigation followed by antib
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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9. Ixorine, a New Cyclopeptide Alkaloid from the Branches of Ixora brevifolia
The isolation and structure determination of new cyclic peptide alkaloid ixorine, along with five known constituents frangulanine, syringaresinol, cinnamtannin B-1, daucosterol and mannitol from the branches of Ixora brevifolia are described. The cyclic peptide frangulanine is being described for the first time in the Rubiaceae family. The structures were el
J. Braz. Chem. Soc.. Publicado em: 2016-04
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10. FLAVONOIDES DE Piper glandulosissimum Yuncker (Piperaceae)
Three flavanones, two chalcones and one dihydrochalcone were isolated from the branches of Piper glandulosissimum. All isolated compounds were characterized based on IR, UV, 1H and 13C NMR, including 2D NMR analyses (HMQC, HMBC, COSY and NOESY) and comparison with the literature. The compound 7-hydroxy-5,8-dimethoxyflavanone displayed antimicrobial activity
Quím. Nova. Publicado em: 2015-02
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11. Solubility measurement and solid-liquid equilibrium model for the ternary system MgBr2 + MgSO4 + H2O at 288.15 K
The solubility of magnesium minerals and the refractive index of the ternary system MgBr2 + MgSO4 + H2O at 288.15 K were investigated using an isothermal dissolution method. It was found that there are two invariant points in the phase diagram and the solubility isotherm of this ternary system consists of three branches, corresponding to equilibrium crystall
Braz. J. Chem. Eng.. Publicado em: 2014-06
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12. Perfil de flavonoides e avaliação do potencial antioxidante e citotóxico de Bauhinia purpurea (Fabaceae) da região amazônica
Bauhinia purpurea (Fabaceae). Plants of the Bauhinia species (Fabaceae) are used in the treatment of several infections and diseases, especially diabetes. In this paper, with an aim to contribute to the knowledge of the chemistry and therapeutic potential of the Amazonian species of the genus Bauhinia, flavonoid profiles in the leaves and branches of Bauhini
Quím. Nova. Publicado em: 2014