Algumas características da lectina de Arundo donax, L.

01

Phenolic compounds and antioxidant activity of the leaves of Plantago australis L. (Plantaginaceae)

The present study was designed to explore the total phenols and flavonoids content in leaf fractions of Plantago australis L., and their radical scavenging activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The free radical scavenging abilities of fractions were determined as: ethyl acetate fraction > crude extract > butanolic fraction > chloroformic fraction. Besides having the highest radical scavenging activity, the ethyl acetate fraction also obtained the highest total phenols and flavonoids contents. Chemical profile of this fraction was obtained by high performance liquid chromatography (HPLC) with photodiode array detector. The comparison with the literature for the ultraviolet espectra for the chromatographic peaks allowed finding compounds similar to neolignins, cinnamic acids derivates, flavonoid (luteolin 7-glycoside) and anthocyanic pigments.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Phenolic compounds and antioxidant activity of the leaves of Plantago australis L. (Plantaginaceae)

The present study was designed to explore the total phenols and flavonoids content in leaf fractions of Plantago australis L., and their radical scavenging activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The free radical scavenging abilities of fractions were determined as: ethyl acetate fraction > crude extract > butanolic fraction > chloroformic fraction. Besides having the highest radical scavenging activity, the ethyl acetate fraction also obtained the highest total phenols and flavonoids contents. Chemical profile of this fraction was obtained by high performance liquid chromatography (HPLC) with photodiode array detector. The comparison with the literature for the ultraviolet espectra for the chromatographic peaks allowed finding compounds similar to neolignins, cinnamic acids derivates, flavonoid (luteolin 7-glycoside) and anthocyanic pigments.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Separação das isoformas da lectina extraída a partir dos rizomas de Arundo donax l

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Stem morphoanatomy of Poiretia tetraphylla (Poiret) Burkart (Leguminosae)

Poiretia tetraphylla is an erect herb to subshrub, perennial, native to Brazil, Argentina, Paraguay and Uruguay. It is popularly known as erva-de-touro-miúda and used in traditional medicine as tonic, in stomach disorders and verminosis. The stem is angular, striate, glabrous with copious amounts of oblong and translucent glands. The epidermis is uniestratified and persistent, stomata well pronounced, thick, smooth and plain cuticle and oval mucilaginous glandular formations. The cortex has parenchyma cells, and the innermost layer is distinguished from others by having large cells with little cytoplasmic content. In this region, protecting the phloem, has a group up to six layers of sclerenchyma fibers. The central cylinder presents vascular system of sifonestelic continuous ectofolic type. The pith is composed of parenchyma cells with intercellular space of meatus type. The whole of these diagnostic traits are useful on the botanical quality control of this species.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Leaf morphoanatomy of Poiretia tetraphylla (Poiret) Burkart (Leguminosae)

Poiretia tetraphylla (Poiret) Burkart (Leguminosae) is a perennial plant that occurs in countryside formations of Brazil, Argentine, Paraguay and Uruguay. This plant is used in traditional medicine as stimulating and stomach disorders. The aim of this work was the determination of morphoanatomy parameters, seeking the botanical control of quality of P. tetraphylla leaves. The morphological analysis was made by means of a stereomicroscope. The anatomical analysis in paradermic and transversal sections was made with hydroxide ethyl methacrylate inclusion. The leaves are characteristically 4-leaflets, with membranaceous consistency, in general oblong to rhomboidal and entire margin. The epidermis one layered has stomata concentrated in the abaxial face. The mesophyll is dorsiventral. The palisade parenchyma presents itself with 2 to 3 cell layers and spongy parenchyma constitutes itself of 4 to 6 layers of irregular cells. In distal portions occurs a pair of secretory cells structure. The vascular bundles are collateral closed and are found protected by a parenchymatous sheath. The whole of these diagnostic traits are useful on the botanical control of quality of this species.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Phenolic compounds and antioxidant activity of the leaves of Plantago australis L. (Plantaginaceae)

The present study was designed to explore the total phenols and flavonoids content in leaf fractions of Plantago australis L., and their radical scavenging activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The free radical scavenging abilities of fractions were determined as: ethyl acetate fraction > crude extract > butanolic fraction > chloroformic fraction. Besides having the highest radical scavenging activity, the ethyl acetate fraction also obtained the highest total phenols and flavonoids contents. Chemical profile of this fraction was obtained by high performance liquid chromatography (HPLC) with photodiode array detector. The comparison with the literature for the ultraviolet espectra for the chromatographic peaks allowed finding compounds similar to neolignins, cinnamic acids derivates, flavonoid (luteolin 7-glycoside) and anthocyanic pigments.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Morphology and Histochemistry of Cladodes of Nopalea cochenillifera (L.) Salm-Dyck (Cactaceae)

Morphoanathomical parameters, for macroscopic and microscopic analyses of the cladodes of Nopalea cochenillifera, plant recognized traditionally like medicinal, allow his authenticity. The phylloclades have wavyness and areoles with three straight and hyaline thorns. The uniseriate epidermis has parallelocytic stomata and mucilaginous cells, followed by an annular collenchyma and a palisade parenchyma on average with eight cell layers. The vascular region is constituted by isolated vascular bundles of the open collateral type. The central cylinder is composed by a parenchymatic medulla. The mucilage structures and the druses of calcium oxalate are present in cortical region in and central cylinder. They are in bigger number near to the vascular bundles. The druses also take place in the first layer of the collenchyma. These morphoanathomical characteristics, when taken together, are consistent in the botanical control of quality of this vegetable sort.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Morpho-anatomy of Glechon spathulata Benth. (Lamiaceae) leaves

Glechon spathulata Benth. (Lamiaceae) is a native plant in Brazil popularly known as "mangerona-do-campo". This plant is a perennial sub-shrub with aromatic leaves used in South America as a condiment and in traditional medicine for different purposes, such as inflammations, dyspepsia, diaphoretic, expectorant and antiseptic in catarrhal affections of the respiratory tract, colds, bronchitis and laryngitis. In this study, morpho-anatomical parameters of leaves of this plant were determimed, by macro and microscopic analysis, aiming to help its diagnosis as a pharmaceutical ingredient. The leaves are sub-sessile with spatulate shape and subrevolute margin, finely crenulate in the middle-upper. The uniseriate epidermis shows straight to slightly sinuous cells, diacytic stomata and non-glandular and glandular trichomes. The mesophyll is dorsiventral, displaying an uniseriate palisade parenchyma and a little compact spongy parenchyma, with an average of 4 cell layers. The vascular bundles are collateral closed. There was no presence of crystals. These morphological and anatomical features, when taken together, contribute to quality control of plant leaves of G. spathulata as a pharmaceutical ingredient.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Experimentos no Ensino de Ciências utilizando materiais alternativos de baixo custo através do ERE na pandemia do Coronavírus

A Pandemia da COVID-19, decreta em março de 2020 pela Organização Mundial de Saúde (OMS), causou grandes impactos econômicos, educacionais, sanitários, sociais, políticos, financeiros e crises na saúde, fundamentado pela recomendação de distanciamento social. Neste sentido muitas escolas e instituições de ensino superior precisaram interromper as atividades presenciais. Os órgãos governamentais precisaram oferecer uma educação segura e longe de riscos da contaminação do coronavírus, através de uma educação remota, usando as Tecnologias Digitais de Informação e Comunicação (TDICs). O presente trabalho visa proporcionar e avaliar experimentos no Ensino de Ciências utilizando materiais alternativos de baixo custo através do novo método de educação, o Ensino Remoto Emergencial (ERE). Foram aplicados os experimentos, as questões relativas às atividades da prática e um questionário (pós-teste) para alunos e professores. Observamos que a maioria dos alunos realizaram os experimentos com sucesso, aumentando seus interesses pela Ciência. Os professores observaram a possibilidade de realizar experimentos através da ERE e o seu impacto na melhoria do processo de ensino-aprendizagem de seus alunos