Atividade antimicrobiana de uma mistura de dois isômeros de glicosídeos fenilpropanóides de Arrabidaea harleyi A.H. Gentry (Bignoniaceae)

Arrabidaea harleyi A.H. Gentry (Bignoniaceae) is an ornamental plant found in some regions of the Atlantic forest in Brazil. From its bark a mixture of verbascoside and isoverbascoside was isolated. This mixture was shown to be active againstStaphylococcus aureus, Micrococcus luteus, Bacillus subtilis, Bacillus mycoides, Enterecoccus faecalis, Escherichia coli, Serratia marcensisand Candida albicans. The minimal inhibitory concentration (MIC) was established by diffusion method.Arrabidaea harleyi A.H. Gentry (Bignoniaceae) é uma planta ornamental, encontrada em algumas regiões da Mata Atlântica do Brasil. A partir das cascas do caule foi isolada a mistura dos isômeros verbascosídeo e isoverbascosídeo. A mistura mostrou-se ativa frente a Staphylococcus aureus, Micrococcus luteus, Bacillus subtilis, Bacillus mycoides, Enterococcus faecalis, Escherichia coli, Serratia marcensis e Candida albicans. Foi estabelecida a concentração mínima inibitória (CMI) através do método de difusão em meio sólido

O uso de plantas e a concepção de doença e cura nos cultos afro-brasileiros

RESUMO Estudo etnobotânico relacionado ao emprego de plantas, ligado às representações de doença e cura nos cultos afro-brasileiros, com enfoque especial para os praticados em Recife-PE. Objetivou-se ampliar o conhecimento sobre esse universo religioso, pouco conhecido e divulgado sob o ponto de vista etnobotânico. Foram coletadas informações e amostras das plantas in loco, assistindo-se aos rituais e procedendo-se à identificação botânica das espécies envolvidas. No contexto mágico-religioso, as plantas adquirem a função de estabelecer a ordem (saúde) ante o desequilíbrio (doença), que pode ter suas causas em forças maléficas sobrenaturais. Conclui-se que, apesar dos marcantes processos aculturativos, os adeptos mantêm o conhecimento tradicional das plantas e a sua inserção no sistema de medicina praticado nos cultos é preservado. ABSTRACT The use of plants and the conception of sickness and cure in the afro-brazilian worships. v. 22, n. 2, p. 197-210, jul./dez. 1994. An ethnobotanical study of the use of plants related to the representation of sickness and cure in the Afro-Brazilian worships, with special attention to those ones of Recife, at the state of Pernambuco, Brazil. The researchers attempted to enlarge the knowledge about that religious universe, not well known, under the ethonobotanical perspective.They had gathered data and samples of that plants in loco, at that rituals, identifying each botanical species. Contends that, in the magic religions, the plants are supposed to set up the order (health) before the disorder (sickness), which may be the result of maleficent supernatural forces. Concludes that, despite strong aculturation, the worshipers maintain the traditional knowledge and medicinal use of those plants. RÉSUMÉ L’utilisation des plantes et la conception de maladies et guérison dans les cultes afro-brésiliens. v. 22, n. 2, p. 197-210, jul./ dez. 1994. Étude ethnobotanique par rapport l’emploi des plantes lié aux représentations des maladies et guérisons dans les cultes afro-brésiliens, mettant en relief surtout ceux pratiqués à Recife (Pernambuco). On y considère comme objectif l’ampliation de la connaissance sur l’univers religieux, peu connu et peu répandu sous le point de vue ethnobotanique. Quelques informations et quelques échantillons ont été récoltés in loco; on a assisté aux rituels et on a procédé à l’identification botanique des spécimens utilisés. Dans le contexte magico-religieux, les plantes ont la fonction d’établir l’ordre (santé) devant le déséquilibre (maladie) qui peut avoir ses origines dans des forces maléfiques surnaturelles. On arrive à la conclusion que, malgré les marquants processus aculturatifs, les adeptes mantiennent la connaissance traditionnelle des plantes et son insertion dans le système de médecine pratiquée dans les cultes est préservée

Environmental factors affecting sporulation of Fuligo septica (Myxomycetes) on sugar cane bagasse

The influence of environmental factors on sporulation of Fuligo septica (L.) Wigg. and the abundance of this species on sugar cane bagasse (Saccharum officinarum L.), stored outdoors was studied.In Northeastern Brazil, between January/1997 and January/1998, a total of 29 specimens were collected through monthly collections of aethalia. The relationships between the abundance of aethalia and rainfall, temperature, relative humidity of the air and insolation were studied. Results indicated that on the substrate analyzed, F. septica was an abundant species. Sporulation occurred in all seasons of the year, with a well-defined peak at the end of winter and beginning of spring (August/September),which was strongly influenced by rainfall

Synthesis, characterization and evaluation of the activity of ten mesoionic compounds against microorganisms

Tres mesoiónicos 1,3,4-tiadiazolio-2-tiolato siete cloruros 1,3,4-triazolio-2-tiol se han sintetizado y se ha probado su actividad contra distintos microoganismos. Las estructuras químicas se determinaron por Análisis Elemental, IR, Masa y espectrometría de RMN 1H e 13C. Las pruebas biológicas indican que los compuestos tienen actividad sustancial contra bacterias Gram positivas y alcohol-ácido-resistentes, actividad moderada contra levaduras, escasa actividad contra otros hongos y son inactivos contra las bacterias Gram negativas ensayadas.Three mesoionic 1,3,4-thiadiazoliuin-2-thiolates and seven 1,3,4-triazolium-2-thiol chlorides have been synthesised and tested for activity against a range of microorganisms. The chemical structures were confirmed by Elemental Analysis, IK, Mass, 1H and 13C NMR spectrometry. The biological tests indicate that the compounds have substantial activity against Gram-positive and alcohol-acid-resistant bacteria; moderate activity against yeasts and little activity against other fungi and are inactive against Gram-negative bacteria.Colegio de Farmacéuticos de la Provincia de Buenos Aire

Synthesis, characterization and evaluation of the activity of ten mesoionic compounds against microorganisms

Tres mesoiónicos 1,3,4-tiadiazolio-2-tiolato siete cloruros 1,3,4-triazolio-2-tiol se han sintetizado y se ha probado su actividad contra distintos microoganismos. Las estructuras químicas se determinaron por Análisis Elemental, IR, Masa y espectrometría de RMN 1H e 13C. Las pruebas biológicas indican que los compuestos tienen actividad sustancial contra bacterias Gram positivas y alcohol-ácido-resistentes, actividad moderada contra levaduras, escasa actividad contra otros hongos y son inactivos contra las bacterias Gram negativas ensayadas.Three mesoionic 1,3,4-thiadiazoliuin-2-thiolates and seven 1,3,4-triazolium-2-thiol chlorides have been synthesised and tested for activity against a range of microorganisms. The chemical structures were confirmed by Elemental Analysis, IK, Mass, 1H and 13C NMR spectrometry. The biological tests indicate that the compounds have substantial activity against Gram-positive and alcohol-acid-resistant bacteria; moderate activity against yeasts and little activity against other fungi and are inactive against Gram-negative bacteria.Colegio de Farmacéuticos de la Provincia de Buenos Aire

In vitro antimicrobial activity of hydro-alcoholic extracts of Psidium guajava L. against gram-negativebacteria

Este estudio tiene como objetivo probar in vitro por los métodos de difusión en disco de papel las susceptibilidades de bacterias Gran-negativas (Escherichia Coli, Pseudomonas Aeruginosa, Shigella spp, Proteus spp, Klebsiella spp, Salmonella spp) a los extractos hidroalcohólicos de hojas y ramas de Psidium guajava (goiabeira vermelha) y determinar su CMI en medio sólido. Se verificó que, expeptuando Klebsiella spp, todas las bacterias testeadas fuero inhibidas por los dos extractos utilizados, siendo que los extractos de hoja presentaron menor actividad para la Salmonella spp (17,3mm) y los extractos de rama fueron mas activos para Proteus spp (18,3mm). La CMI varió de 1,8 a 2,4 mg/mL en extracto de hoja y de 1,2 a 2,4 mg/mL en el extracto de rama. Para la Shigella spp y Pseudomonas Aeruginosa, la CMI fue de 1,2/mL en el extracto de rama. No hubo diferencias estadísticamente significantes entre los dos tipos de extractos, tanto en los tets antimicrobianos como en los valores de CMI.In vitro antimicrobial activity of hydro-alcoholic extracts of Psidium guajava L. against gram-negative bacteria. The aim of this study was to test in vitro by a standardized single disk method the susceptibility of gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Shigella spp, Proteus spp, Klebsiella spp, Salmonella spp) in relation to hydro-alcoholic extracts of leaf and branch of Psidium guajava L. (known as goiabeira vermelha). A second aim was to determine the Minimum Inhibitory Concentration (MIC) in a solid medium. Except for Klebsiella spp, all tested bacteria were inhibited by both extracts. Leaf extract proved to be more active against Salmonella spp (17.3 mm) while branch extract showed better results against Proteus spp 18.3 mm). Minimum Inhibitory Concentration varied from 1.8 up to 2.4 mg/mL of leaf extract whereas for branch extract it varied from 1.2 up to 2.4 mg/mL. For Shigella spp and Pseudomonas aeruginosa MIC values were 1.2 mg/mL of branch extract. In general, no statistically significant differences were observed between both extracts when testing antimicrobial activity and MIC.Colegio de Farmacéuticos de la Provincia de Buenos Aire

In vitro antimicrobial activity of hydro-alcoholic extracts of Psidium guajava L. against gram-negativebacteria

Este estudio tiene como objetivo probar in vitro por los métodos de difusión en disco de papel las susceptibilidades de bacterias Gran-negativas (Escherichia Coli, Pseudomonas Aeruginosa, Shigella spp, Proteus spp, Klebsiella spp, Salmonella spp) a los extractos hidroalcohólicos de hojas y ramas de Psidium guajava (goiabeira vermelha) y determinar su CMI en medio sólido. Se verificó que, expeptuando Klebsiella spp, todas las bacterias testeadas fuero inhibidas por los dos extractos utilizados, siendo que los extractos de hoja presentaron menor actividad para la Salmonella spp (17,3mm) y los extractos de rama fueron mas activos para Proteus spp (18,3mm). La CMI varió de 1,8 a 2,4 mg/mL en extracto de hoja y de 1,2 a 2,4 mg/mL en el extracto de rama. Para la Shigella spp y Pseudomonas Aeruginosa, la CMI fue de 1,2/mL en el extracto de rama. No hubo diferencias estadísticamente significantes entre los dos tipos de extractos, tanto en los tets antimicrobianos como en los valores de CMI.In vitro antimicrobial activity of hydro-alcoholic extracts of Psidium guajava L. against gram-negative bacteria. The aim of this study was to test in vitro by a standardized single disk method the susceptibility of gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa, Shigella spp, Proteus spp, Klebsiella spp, Salmonella spp) in relation to hydro-alcoholic extracts of leaf and branch of Psidium guajava L. (known as goiabeira vermelha). A second aim was to determine the Minimum Inhibitory Concentration (MIC) in a solid medium. Except for Klebsiella spp, all tested bacteria were inhibited by both extracts. Leaf extract proved to be more active against Salmonella spp (17.3 mm) while branch extract showed better results against Proteus spp 18.3 mm). Minimum Inhibitory Concentration varied from 1.8 up to 2.4 mg/mL of leaf extract whereas for branch extract it varied from 1.2 up to 2.4 mg/mL. For Shigella spp and Pseudomonas aeruginosa MIC values were 1.2 mg/mL of branch extract. In general, no statistically significant differences were observed between both extracts when testing antimicrobial activity and MIC.Colegio de Farmacéuticos de la Provincia de Buenos Aire