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Pesquisa : B01.650.940.800.575.912.250.401.025 [Categoria DeCS]
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Melo, Itamar Soares de
Azevedo, Joäo Lucio de
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Id: biblio-889203
Autor: Castro, Renata Assis; Dourado, Manuella Nóbrega; Almeida, Jaqueline Raquel de; Lacava, Paulo Teixeira; Nave, André; Melo, Itamar Soares de; Azevedo, João Lucio de; Quecine, Maria Carolina.
Título: Mangrove endophyte promotes reforestation tree (Acacia polyphylla) growth
Fonte: Braz. j. microbiol;49(1):59-66, Jan.-Mar. 2018. tab, graf.
Idioma: en.
Projeto: FAPESP; . CNPq.
Resumo: ABSTRACT Mangroves are ecosystems located in the transition zone between land and sea that serve as a potential source of biotechnological resources. Brazil's extensive coast contains one of the largest mangrove forests in the world (encompassing an area of 25,000 km2 along all the coast). Endophytic bacteria were isolated from the following three plant species: Rhizophora mangle, Laguncularia racemosa and Avicennia nitida. A large number of these isolates, 115 in total, were evaluated for their ability to fix nitrogen and solubilize phosphorous. Bacteria that tested positive for both of these tests were examined further to determine their level of indole acetic acid production. Two strains with high indole acetic acid production were selected for use as inoculants for reforestation trees, and then the growth of the plants was evaluated under field conditions. The bacterium Pseudomonas fluorescens (strain MCR1.10) had a low phosphorus solubilization index, while this index was higher in the other strain used, Enterobacter sp. (strain MCR1.48). We used the reforestation tree Acacia polyphylla. The results indicate that inoculation with the MCR1.48 endophyte increases Acacia polyphylla shoot dry mass, demonstrating that this strain effectively promotes the plant's growth and fitness, which can be used in the seedling production of this tree. Therefore, we successfully screened the biotechnological potential of endophyte isolates from mangrove, with a focus on plant growth promotion, and selected a strain able to provide limited nutrients and hormones for in plant growth.
Descritores: Bactérias/isolamento & purificação
Árvores/microbiologia
Acacia/microbiologia
Endófitos/isolamento & purificação
-Filogenia
Bactérias/classificação
Bactérias/genética
Bactérias/metabolismo
Árvores/crescimento & desenvolvimento
Brasil
Acacia/crescimento & desenvolvimento
Áreas Alagadas
Endófitos/classificação
Endófitos/genética
Endófitos/metabolismo
Ácidos Indolacéticos/metabolismo
Responsável: BR1.1 - BIREME


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Id: biblio-951941
Autor: Saleem, Bushra; Islam, Muhammad; Saeed, Hamid; Imtiaz, Fariha; Asghar, Maryam; Saleem, Zikria; Mehmood, Azra; Naheed, Surriya.
Título: Investigations of Acacia modesta Wall. leaves for in vitro anti-diabetic, proliferative and cytotoxic effects
Fonte: Braz. J. Pharm. Sci. (Online);54(2):e17467, 2018. tab, graf.
Idioma: en.
Resumo: ABSTRACT The leaves of Acacia modesta Wall. have been shown to possess diverse pharmacological properties. Therefore, we aimed at evaluating anti-diabetic, cytotoxic and proliferative effects of extracts of Acacia modesta Wall. leaves. After evaluating the primary and secondary metabolites, anti-diabetic activity of various extracts was assessed by α-amylase inhibition, glucose uptake by yeast cells and non-enzymatic glycosylation of hemoglobin assay. Cytotoxicity and proliferative potential was assessed by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) and short term proliferation assays, respectively, using human liver carcinoma cell line, HepG2. Among other extracts, chloroform extract exhibited 34.16% inhibition of α-amylase, 90.65% inhibition of hemoglobin glycosylation and 94.75% glucose uptake employing α-amylase inhibition, non-enzymatic glycosylation of hemoglobin and glucose uptake by yeast cells assays, respectively. Moreover, extracts exhibited no significant effects on HepG2 cell viability and proliferation. So, this data suggested that chloroform extract of leaves of Acacia modesta Wall., exhibited higher anti-hyperglycemic activity in comparison to extracts in other solvents, while no extract demonstrated cytotoxic and proliferation effects when tested using HepG2 cell line
Descritores: Folhas de Planta/classificação
Acacia/efeitos adversos
-Técnicas In Vitro
Extratos Vegetais/análise
Hipoglicemiantes/farmacologia
Responsável: BR1.1 - BIREME


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Id: biblio-964562
Autor: Silva, Cristiane Figueira da; Carmo, Élida Ribeiro do; Martins, Marco Antônio; Freitas, Marta Simone Mendonça de; Pereira, Marcos Gervasio; Silva, Eliane Maria Ribeiro da.
Título: Deposition and nutritional quality of the litter of pure stands of Eucalyptus camaldulensis and Acacia mangium / Aporte e qualidade nutricional da serapilheira de plantios puros de Eucalyptus camaldulensis e Acacia mangium
Fonte: Biosci. j. (Online);31(4):1081-1091, july/aug. 2015.
Idioma: en.
Resumo: The aim of this study was to evaluate the contribution of pure stands of Eucalyptus camaldulensis and Acacia mangium for litter deposition and nutrient return in a pit of clay extraction in northern Rio de Janeiro (RJ). We conducted a randomized block design experiment with two treatments and three replications. For the evaluation of the annual deposition of litter and nutrients (N, P, K, Ca and Mg), we used circular collectors during a year (from July 2006 to June 2007). The planting of Acacia mangium in clay extraction pits contributed with the largest annual deposition of litter and with a litter of better quality compared to Eucalyptus camaldulensis, with higher levels of P and N and lower C:N and polyphenol:N ratios. This fact possibly allows higher rates of decomposition by edaphic microorganisms and, hence, a faster release of these nutrients to the soil. In addition, the planting of legumes showed higher annual deposition of P and N.

O objetivo deste estudo foi avaliar a contribuição de plantios puros de Eucalyptus camaldulensis (Eucalipto) e Acacia mangium (Acácia) na deposição de serapilheira e retorno de nutrientes em uma cava de extração de argila na região norte fluminense (RJ). Realizou-se um experimento, cujo delineamento utilizado foi o de blocos casualizados com dois tratamentos e três repetições. Para a avaliação do aporte anual de serapilheira e nutrientes (N, P, K, Ca e Mg), utilizaram-se coletores circulares, durante o período de um ano (julho de 2006 a junho de 2007). O plantio de Acacia mangium na cava de extração de argila contribuiu com o maior aporte anual de serapilheira total, bem como, uma serapilheira de melhor qualidade em relação ao Eucalyptus camaldulensis, apresentando maiores teores de P e N e menores relações C:N e Polifenol:N. Este fato possivelmente permite maiores taxas de decomposição pelos microrganismos edáficos, e consequente mais rápida liberação desses nutrientes para o solo. Além disso, o plantio da leguminosa apresentou maior aporte anual de P e N.
Descritores: Cultivos Agrícolas
Argila
Alimentos
Acacia
Eucalyptus
Fabaceae
Responsável: BR396.1 - Biblioteca Central


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Id: lil-780050
Autor: LEAL, L.S.S.; SILVA, R.O.; ARAUJO, T.S.L.; SILVA, V.G.; BARBOSA, A.L.R.; MEDEIROS, J.V.R.; OLIVEIRA, J.S.; VENTURA, C.A..
Título: The anti-inflammatory and antinociceptive effects of proteins extracted from Acacia farnesiana seeds / Efeito antiiflamatório e antinociceptivo de proteínas extraídas de sementes de Acacia farnesiana
Fonte: Rev. bras. plantas med;18(1):38-47, jan.-mar. 2016. tab, graf.
Idioma: en.
Resumo: ABSTRACT Seeds of Acacia farnesiana are commonly sold in the local markets of northeastern Brazil as a therapeutic agent. The present work aimed to evaluate the anti-inflammatory and analgesic activities of proteins obtained from A. farnesiana seeds. Five different protein fractions (albumin, globulin, prolamin, acidic and basic glutelins) were obtained and investigated for the protein pattern, the presence of hemagglutinating and proteolytic activities. The globulin fraction (GLB) was also evaluated for anti-inflammatory and analgesic activities. Globulins reduced the paw edema induced by carrageenan in a dose-dependent manner, which was accompanied by a reduction of myeloperoxidase activity (p < 0.05). Additionally, GLB reduced the neutrophil peritoneal migration induced by carrageenan. However, GLB was not able to inhibit the edema triggered by dextran. Pre-treatment with globulins reduced the abdominal constrictions induced by acetic acid as well as the paw licking time induced by formalin (69.1% at first phase). However, it did not produce a significant antinociceptive effect in the hot plate test (55-56 °C). Treating the GLB with heat (at 100 °C for 30 min) abolished its anti-edematogenic and hemagglutinating activities. Our results showed that seeds from A. farnesiana are a source of proteins with anti-inflammatory and analgesic properties.

RESUMO Sementes de Acacia farnesiana são comumente vendidas em feiras locais no nordeste do Brasil como agente terapêutico. O presente trabalho objetivou avaliar as atividades antiinflamatória e antinociceptiva de proteínas obtidas de sementes de A. farnesiana. Cinco frações protéicas distintas (albuminas, globulinas, prolaminas, glutelinas ácidas e básicas) foram obtidas e investigadas quanto o perfil de proteínas, presença de atividade hemaglutinante e proteolítica. A fração globulina (GLB) também foi avaliada quanto a presença de atividade antiinflamatória e analgésica. Globulinas reduziram o edema de pata induzido por carragenina de modo dependente da dose que foi acompanhada da redução da atividade da mieloperoxidase (p < 0,05). Em adição, GLB reduziu a migração de neutrófilos para cavidade peritoneal induzida por carragenina. Entretanto, GLB não foi capaz de inibir o edema induzido por dextrana. O pré-tratamento com globulinas reduziu as contorções abdominais induzidas por ácido acético, bem como o tempo de lambedura da pata induzida por formalina (69.1% na primeira fase). Por outro lado, GLB não produziu um efeito antinociceptivo significante no teste de placa quente (55-56 °C). O pré-tratamento de GLB com calor (100 °C por 30 min) aboliu sua atividade anti-edematogênica e hemaglutinante. Nossos resultados mostraram que sementes de A. farnesiana são fonte de proteínas com propriedades antiinflamatórias e analgésicas.
Descritores: Acacia/classificação
Analgésicos/classificação
Anti-Inflamatórios/classificação
-Lectinas/análise
Nociceptividade/classificação
Responsável: BR1.1 - BIREME


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Id: lil-675446
Autor: Venier, Paula; Cabido, Marcelo; Mangeaud, Arnaldo; Funes, Guillermo.
Título: Crecimiento y supervivencia de plántulas de cinco especies de Acacia (Fabaceae), que coexisten en bosques secos neotropicales de Argentina, en distintas condiciones de disponibilidad de luz y agua / Seedlings growth and survival of five Acacia (Fabaceae) species that coexists in neotropical semiarid forests of Argentina, under different light and water availability conditions
Fonte: Rev. biol. trop;61(2):583-594, Jun. 2013. ilus, graf, tab.
Idioma: es.
Resumo: Seedling establishment is one of the most risky stages of plants, especially in arid and semiarid regions, where low water availability and high solar radiation influence its emergence, development and survival. In seasonally dry xerophytic forests occurring in North-Western Córdoba, central Argentina, five neotropical species of Acacia co-exist: A. aroma, A. caven, A. atramentaria, A. gilliesii and A. praecox. With the aim to evaluate growth variables and survival of these five species seedlings, in response to water stress and different light availability conditions, a greenhouse experiment was undertaken from March to June of 2010. Although small differences were found between species (F=5.66, p=0.001), all of them showed high percentages of seedling survival in response to different light and water treatments, suggesting that seedlings would be tolerant to water stress and could be established both in light and shade. On the other hand, although all species showed an increase in growth in light conditions and without water stress, we have found some trends towards a greater growth in the seedlings of A. aroma, A. caven and A. atramentaria when compared to those of A. praecox and A. gilliessi in most of the variables considered (F=41.9, p<0.0001; F=7.06, p<0.0001; F=53.59, p<0.0001). This pattern was confirmed through a cluster analysis that classified the species in two main groups. These results, together with others already reported, would indicate a regenerative niche differentiation that might be favoring the regional coexistence of these five species in semiarid forests in central Argentina.

El establecimiento de la plántula es una de las etapas más riesgosas para las plantas, especialmente en zonas áridas y semiáridas donde la sequía y alta radiación solar influyen sobre su emergencia, desarrollo y supervivencia. Se evaluó en invernadero la supervivencia y variables de crecimiento en plántulas sometidas a estrés hídrico y a distintas condiciones de luz, en cinco especies de Acacia (A. aroma, A. caven, A. atramentaria, A. gilliesii y A. praecox) que coexisten en los bosques xerófilos de Córdoba, Argentina. Aunque se encontraron diferencias entre las especies (F=5.66, p=0.001), todas tuvieron altos porcentajes de supervivencia en las distintas condiciones de luz y agua, sugiriendo que serían tolerantes al estrés hídrico y podrían establecerse bajo luz o sombra. Si bien todas las especies mejoraron el crecimiento con luz y sin estrés hídrico, A. aroma, A. caven y A. atramentaria mostraron una tendencia hacia un mayor crecimiento en la mayoría de las variables consideradas (F=41.9, p<0.0001; F=7.06, p<0.0001; F=53.59, p<0.0001). Estos resultados sumados a otros ya reportados indicarían una diferenciación de nichos regenerativos favoreciendo la coexistencia regional de estas especies en los bosques xerófilos de Córdoba.
Descritores: Acacia/crescimento & desenvolvimento
Luz
Plântula/crescimento & desenvolvimento
Árvores
Água
-Argentina
Acacia/classificação
Clima Tropical
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: CR1.1 - BINASSS - Biblioteca Nacional de Salud y Seguridad Social


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Id: lil-638049
Autor: Castellanos-Barliza, Jeiner; León Peláez, Juan Diego.
Título: Descomposición de hojarasca y liberación de nutrientes en plantaciones de Acacia mangium (Mimosaceae) establecidas en suelos degradados de Colombia
Fonte: Rev. biol. trop;59(1):113-128, mar. 2011. graf, tab.
Idioma: es.
Resumo: Litter decomposition and nutrient release in Acacia mangium plantations established on degraded soils of Colombia. Several factors control the decomposition in terrestrial ecosystems such as humidity, temperature, quality of litter and microbial activity. We investigated the effects of rainfall and soil plowing prior to the establishment of Acacia mangium plantations, using the litterbag technique, during a six month period, in forests plantations in Bajo Cauca region, Colombia. The annual decomposition constants (k) of simple exponential model, oscillated between 1.24 and 1.80, meanwhile k1 y k2 decomposition constants of double exponential model were 0.88-1.81 and 0.58-7.01. At the end of the study, the mean residual dry matter (RDM) was 47% of the initial value for the three sites. We found a slow N, Ca and Mg release pattern from the A. mangium leaf litter, meanwhile, phosphorus (P) showed a dominant immobilization phase, suggesting its low availability in soils. Chemical leaf litter quality parameters (e.g. N and P concentrations, C/N, N/P ratios and phenols content) showed an important influence on decomposition rates. The results of this study indicated that rainfall plays an important role on the decomposition process, but not soil plowing. Rev. Biol. Trop. 59 (1): 113-128. Epub 2011 March 01.

La descomposición de hojarasca en los ecosistemas terrestres está regulada por varios factores, entre ellos, la humedad, temperatura, calidad de la hojarasca y la actividad de los microoganismos. Estudiamos el efecto de la precipitación y el tratamiento de subsolado del suelo previo establecimiento de plantaciones de Acacia mangium, usando la técnica de bolsas de descomposición durante seis meses en plantaciones del Bajo Cauca (Colombia). La constante de descomposición anual (k) del modelo simple exponencial, osciló entre 1.24 y 1.80. Las constantes k1 y k2 del modelo doble exponencial fluctuaron entre 0.88-1.81 y 0.58-7.01. Al final del experimento la materia seca residual promedio (MSR) fue del 47%. Las cantidades residuales de N, Ca y Mg en la hojarasca de A. mangium mostraron un patrón de liberación lento. La evolución del P en la MSR mostró un proceso dominante de inmovilización, dada su baja disponibilidad en el suelo. Algunos parámetros de calidad del sustrato (N, P, C/N, N/P y fenoles) fueron buenos predictores del proceso, así como la precipitación, situación contraria a la del tratamiento de subsolado.
Descritores: Acacia/metabolismo
Folhas de Planta/metabolismo
Solo/análise
-Biodegradação Ambiental
Colômbia
Chuva
Estações do Ano
Fatores de Tempo
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: CR1.1 - BINASSS - Biblioteca Nacional de Salud y Seguridad Social


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Id: lil-637714
Autor: Doi, Ryoichi; Ranamukhaarachchi, Senaratne Leelananda.
Título: Soil dehydrogenase in a land degradation-rehabilitation gradient: observations from a savanna site with a wet/dry seasonal cycle
Fonte: Rev. biol. trop;57(1/2):223-234, March-June 2009. graf, mapas, tab.
Idioma: en.
Resumo: Soil dehydrogenase activity is a good indicator of overall microbial activity in soil, and it can serve as a good indicator of soil condition. However, seasonal changes in soil moisture content may have an effect on soil dehydrogenase activity, making an accurate assessment of soil condition difficult. In this study, we attempted to determine the significance of soil dehydrogenase activity for assessing soil condition, and we attempted to find a way to account for the influence of soil moisture content on soil dehydrogenase activity. Soils were sampled in dry evergreen forest (original vegetation), bare ground (severely degraded) and Acacia plantation plots established on bare ground in 1986 and 1987 in Sakaerat, Thailand. Soil physico-chemical characteristics and dehydrogenase activity in the Acacia plantation soil had few differences from those in the evergreen forest soil. Soil dehydrogenase activity varied significantly between the bare ground and the forests regardless of the season (wet or dry), while the season did not produce a significant variation in soil dehydrogenase activity, as determined by repeated measures analysis of variance (p=0.077). The physico-chemical data provided the first principal component as a good measure of soil fertility. Values of soil dehydrogenase activity significantly correlated to scores of the soil samples of the first principal component (R=0.787, p<0.001). We found that soil dehydrogenase activity is a useful indicator of the extent of soil degradation and the rehabilitative effects of reforestation in this part of Thailand. Rev. Biol. Trop. 57 (1-2): 223-234. Epub 2009 June 30.
Descritores: Acacia/metabolismo
Oxirredutases/metabolismo
Microbiologia do Solo
Solo/análise
Árvores/metabolismo
-Estações do Ano
Tailândia
Responsável: CR1.1 - BINASSS - Biblioteca Nacional de Salud y Seguridad Social


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Id: lil-622871
Autor: Andrade, Cláudia Alexandra de; Carvalho, João Luiz de Souza; Cunico, Miriam Machado; Lordello, Ana Luísa Lacava; Higaskino, Carmen Etsuko Kataoka; Almeida, Siumara Costa da Cruz; Dias, Josiane de Fátima Gaspari; Kerber, Vitor Alberto; Miguel, Marilis Dallarmi; Miguel, Obdúlio Gomes.
Título: Antioxidant and antibacterial activity of extracts, fractions and isolated substances from the flowers of Acacia podalyriifolia A. Cunn. ex G. Don
Fonte: Braz. j. pharm. sci;46(4):715-722, Oct.-Dec. 2010. ilus, tab.
Idioma: en.
Resumo: The extracts and fractions from the flowers of A. podalyriifolia were analyzed previously for antibacterial activity using diffusion in disk, Antioxidant properties were evaluated by determining radical scavenging power (DPPH test) and total phenol content was measured (Folin method). The present study describes the in vitro antibacterial (determining minimum inhibitory concentration) and antioxidant activities (by thiobarbituric acid reactive species - TBARS method) for the ethanol extract, dichloromethane and ethyl acetate fractions and two flavanones (naringenin and 5-β-D-glycosyl-naringenin) isolated from the flowers of Acacia podalyriifolia A. Cunn. ex G. Don. The flavanones naringenin and 5-β-D-glycosyl-naringenin had not previously been obtained from this species. The most effective antibacterial activity was observed in the ethyl acetate fraction (MIC=0.25 mg mL-1 against Staphylococcus aureus ATCC 6538, MIC = 0.125 mg mL-1 against Staphylococcus epidermidis ATCC 12229, MIC=0.5 mg mL-1 against Streptococcus pyogenes ATCC 19615, Klebsiella pneumoniae ATCC 13883 and Proteus mirabilis ATCC 43071). The evaluated samples showed antioxidant activity on the TBARS test, especially for ethanol extract (1000 ppm), which was the most active (29.43% ± 0.65) followed by ethyl acetate fraction (1000 ppm, 24.84% ± 1,28), both demonstrating higher activity than that presented by ascorbic acid (1000 ppm, 21.73% ± 1.77), although lower than the BHT (1000 ppm 35.15% ± 3.42), both reference compounds. Naringenin and 5-β-D-glycosyl-naringenin demonstrated antioxidant action, but only naringenin inhibited the growth of gram-positive and gram-negative bacteria.

Os extratos e frações de Acacia podalyriifolia foram analisados previamente para a atividade antibacteriana através da difusão em disco e as propriedades antioxidantes foram verificadas pela determinação da capacidade removedora do radical livre DPPH e pela mensuração do conteúdo de fenólicos totais (Método de Folin). O presente estudo descreve as atividades antibacteriana (determinação da concentração inibitória mínima) e antioxidante (espécies reativas do ácido tiobarbitúrico - teste TBARS) para o extrato etanólico e as frações diclorometano e acetato de etila e para duas flavanonas (naringenina e 5-β-D-glicosil-naringenina) isoladas das flores de Acacia podalyriifolia A. Cunn. ex G. Don. As flavanonas naringenina e 5-β-D-glicosil-naringenina ainda não haviam sido obtidas desta espécie. A atividade antibacteriana mais efetiva foi observada com a fração acetato de etila (CIM=0,25 mg/mL contra Staphylococcus aureus ATCC 6538; CIM=0,125 mg/mL, contra Staphylococcus epidermidis ATCC 12229; CIM=0,5 mg/mL contra Streptococcus pyogenes ATCC 19615, Klebsiella pneumoniae ATCC 13883 e Proteus mirabilis ATCC 43071). As amostras avaliadas demonstraram atividade pelo teste TBARS, especialmente o extrato etanólico (1000 ppm), que foi o mais ativo (29,43% ± 0.65), seguido pela fração acetato de etila (1000 ppm, 24,84% ± 1,28), ambos demonstrando atividade mais elevada que a apresentada pelo ácido ascórbico (1000 ppm, 21,73% ± 1,77), ainda que menor que a do BHT (1000 ppm, 35,15% ± 3,42), ambas substâncias de referência. Naringenina e 5-β-D-glicosil-naringenina demonstraram ação antioxidante, porém somente a naringenina inibiu o crescimento de bactérias gram-positivas e gram-negativas.
Descritores: Acacia
Antibacterianos/farmacologia
Antioxidantes/farmacologia
Extratos Vegetais/química
Flores
-Etnofarmacologia/métodos
Flavanonas
Flavonoides
Medicamentos Fitoterápicos
Tipo de Publ: Estudo de Avaliação
Responsável: BR40.1 - DBD - Divisão de Biblioteca e Documentacão do Conjunto das Químicas


  9 / 15 LILACS  
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Id: lil-549398
Autor: Mattana, C. M; Satorres, S. E; Sosa, A; Fusco, M; Alcaráz, L. E.
Título: Antibacterial activity of extracts of Acacia aroma against methicillin-resistant and methicillin-sensitive Staphylococcus
Fonte: Braz. j. microbiol;41(3):581-587, Oct. 2010. ilus, tab.
Idioma: en.
Projeto: Universidad Nacional de San Luis.
Resumo: Antibacterial activity of organic and aqueous extracts of Acacia aroma was evaluated against methicillin-resistant Staphylococcus aureus (MRSA), methicillin sensitive Staphylococcus aureus (MSSA) and methicillin-resistant Staphylococcus epidermidis. Inhibition of bacterial growth was determined using agar diffusion and bioautographic methods. Among all assayed organic extracts only ethanolic and ethyl acetate extracts presented highest activities against all tested Staphylococcus strains with minimal inhibitory concentration (MIC) values ranging from 2.5 to 10 mg/ml and from 2.5 to 5 mg/ml respectively. The aqueous extracts show little antibacterial activity against Staphylococcus strains. The bioautography assay demonstrated well-defined growth inhibition zones against S. aureus in correspondence with flavonoids and saponins. A. aroma would be an interesting topic for further study and possibly for an alternative treatment for skin infections.
Descritores: Antibacterianos
Acacia/crescimento & desenvolvimento
Estruturas Vegetais/crescimento & desenvolvimento
Extratos Vegetais/análise
Resistência a Meticilina
Staphylococcus epidermidis/isolamento & purificação
-Crescimento Bacteriano
Métodos
Técnicas
Limites: Humanos
Tipo de Publ: Relatório Técnico
Responsável: BR32.1 - Serviço de Biblioteca e Informação Biomédica


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Id: lil-456996
Autor: Andrade, Cláudia Alexandra de; Costa, Camila Klocker; Bora, Karina; Miguel, Marilis Dallarmi; Miguel, Obdúlio Gomes; Kerber, Vitor Alberto.
Título: Determinação do conteúdo fenólico e avaliação da atividade antioxidante de Acacia podalyriifolia A. Cunn. ex G. Don, Leguminosae-mimosoideae / Determination of the phenolic content and evaluation of the antioxidant activity of Acacia podalyriifolia A. Cunn. ex G. Don, Leguminosae-mimosoideae
Fonte: Rev. bras. farmacogn = Braz. j. pharmacogn.;17(2):231-235, abr.-jun. 2007. tab.
Idioma: pt.
Resumo: Espécies de Acacia são tradicionalmente utilizadas para o tratamento de diversas patologias. Estudos quimiotaxonômicos têm relacionado o gênero Acacia como fonte de compostos fenólicos, os quais apresentam propriedades biológicas diversas. Este trabalho destaca a atividade antioxidante de Acacia podalyriifolia. Esta planta é originária da Austrália e amplamente cultivada no Sul do Brasil como ornamental. O material vegetal (flores) foi seco à sombra, submetido à extração com etanol, seguido de partição com hexano, diclorometano e acetato de etila. A triagem fitoquímica realizada no extrato etanólico bruto e nas suas frações, demonstrou a presença de compostos fenólicos e flavonóides. A determinação do conteúdo fenólico foi realizada com o reativo Folin Ciocalteau, verificando ser a fração acetato de etila (FAE) a que apresentou a maior concentração (338,5 mg de ácido gálico/g de FAE). Na avaliação da atividade captadora de radical, empregando o radical livre DPPH, a fração acetato de etila demonstrou atividade antioxidante mais elevada (IC50 = 3,22 µg/mL de FAE).

Acacia species are usually used as treatment for several diseases. Chemotaxonomic studies have related the Acacia genus as a source of phenolic compounds, which present several biological properties. This work emphasizes the antioxidant activity of Acacia podalyriifolia. This plant is natural from Australia and vastly cultivated in the South of Brazil as ornamental feature. The plant material (flowers) was shadow-dried and submitted to the extraction with ethanol, followed by partition with hexane, dichloromethane and ethyl acetate. The phytochemical screening performed in the ethanol crude extract and in its fractions showed the presence of phenolic compounds and flavonoids. Determination of the phenolic content was performed with the Folin Ciocalteau reagent. It was found out that the ethyl acetate fraction (FAE) was the one that displayed the biggest concentration (338,5 mg of gallic acid/g of FAE). In the evaluation of the radical scavenging activity, using the free radical DPPH, the ethyl acetate fraction showed the highest antioxidant activity (IC50 = 3,22 µg/mL from FAE).
Descritores: Acacia
Antioxidantes
Compostos Fenólicos
Extratos Vegetais
Responsável: BR8.1 - Biblioteca Central



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