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Id: lil-787264
Autor: Burcu, Gul Baykalir; Osman, Ciftci; Aslı, Cetin; Namik, Oztanir Mustafa; Neşe, Basak Türkmen.
Título: The protective cardiac effects of Β-myrcene after global cerebral ischemia/reperfusion in C57BL/J6 mouse
Fonte: Acta cir. bras;31(7):456-462tab, graf.
Idioma: en.
Resumo: ABSTRACT PURPOSE: To investigate the protective effect of β-myrcene (MYR) on oxidative and histological damage in mice heart tissue caused global cerebral ischemia/reperfusion (IR) in C57BL/J6 mice. METHODS: Animals(n=40) were randomly divided into four groups: (1)control, (2)IR, (3)MYR and (4)MYR+IR. The control group was received 0.1% carboxymethyl cellulose as a vehicle following a medial incision without carotid occlusion. In the IR group, the bilateral carotid arteries were clipped for 15min, and treated with the vehicle intraperitoneally(ip) for 10 days. MYR (200mg/kg) was received dissolved in 0.1%CMC for 10 days. In the MYR+IR group, the IR model was applied exactly as in the IR group, and then they were treated with MYR 10 days. RESULTS: The cerebral IR caused oxidative damage (increase TBARS, decrease antioxidant parameters). Treatment of MYR was increased in GSH,GPx,CAT,SOD activity while TBARS level was decreased. In addition, degenerative changes in I/R group heart tissue were ameliorated by MYR administration. CONCLUSİON: The administration of β-myrcene protects oxidative and histological damage in the heart tissue after global ischemia-reperfusion and may be useful safe alternative treatment for cardiac tissue after ischemic stroke.
Descritores: Cardiotônicos/farmacologia
Traumatismo por Reperfusão/complicações
Isquemia Encefálica/complicações
Monoterpenos/farmacologia
Coração/efeitos dos fármacos
Antioxidantes/farmacologia
-Superóxido Dismutase/metabolismo
Catalase/metabolismo
Distribuição Aleatória
Substâncias Reativas com Ácido Tiobarbitúrico/metabolismo
Estresse Oxidativo/efeitos dos fármacos
Modelos Animais
Glutationa/metabolismo
Glutationa Peroxidase/metabolismo
Camundongos Endogâmicos C57BL
Miocárdio/metabolismo
Miocárdio/patologia
Limites: Animais
Masculino
Responsável: BR1.1 - BIREME


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Id: biblio-1008258
Autor: Chacón-Fuentes, Manuel; Bardehle, Leonardo; Seguel, Ivette; Medina, Cristian; Quiroz, Andrés.
Título: Volatiles induction in response to mechanical damage is reduced by domestication in murtilla / La inducción de volátiles en respuesta al daño mecánico es reducida por la domesticación en murtilla
Fonte: Bol. latinoam. Caribe plantas med. aromát;18(4):435-443, jul. 2019. ilus, tab.
Idioma: en.
Projeto: CONICYT; . FONDECYT; . FONDEF-INIA.
Resumo: Volatiles compounds are involved in defensive induction against insects, playing an important role in insect-plant interaction being induced by response to mechanical damage. However, they could decrease according to the domestication degree in cultivated plants. Currently, it has been established that secondary metabolites are reduced due to the domestication process in murtilla. Hence, the follow question emerges: Are volatile organic compounds induced by mechanical damage reduced in cultivated murtilla plants in relation to wild plants? Two cultivated ecotypes and their respective wild counterparts were sampled. Volatiles compounds were obtained using Porapak-Q columns and analyzed by gas chromatography. Results showed that compounds as 2-hexanone, α-pinene, 2-thujene, 3-thujene and 1,8- cineole were more abundant in wild plants exposed to a mechanical damage than cultivated plants. Hence, these compounds have been associated to induced defense, these results suggest that domestication reduced the induction of defensive volatiles in cultivated murtilla in response to mechanical damage.

Los compuestos volátiles están implicados en la defensa inducida contra insectos, desempeñando un papel importante en esta interacción. Sin embargo, estos compuestos podrían disminuir según el grado de domesticación. Actualmente, se ha reportado que algunos metabolitos secundarios son reducidos en plantas de murtilla domesticadas. Por lo tanto, surge la siguiente pregunta de investigación: ¿Los compuestos orgánicos volátiles inducidos por el daño mecánico son reducidos en plantas cultivadas de murtilla en comparación con plantas silvestres? Para dos ecotipos cultivados y sus respectivas contrapartes silvestres, los compuestos volátiles fueron capturados usando columnas de Porapak-Q y las muestras analizadas por cromatografía gaseosa. Los resultados mostraron que compuestos tales como 2- hexanona, α-pineno, 2-tujeno, 3-tujeno y 1,8-cineol fueron más abundantes en plantas silvestres expuestas a daño mecánico que en cultivadas. Debido a que estos compuestos se han asociado a defensa inducida, estos resultados sugieren que la domesticación reduce la inducción de volátiles en plantas cultivadas sometidas a daño mecánico.
Descritores: Óleos Voláteis/metabolismo
Myrtaceae/metabolismo
Myrtaceae/microbiologia
Domesticação
Insetos/fisiologia
-Sesquiterpenos/análise
Sesquiterpenos/metabolismo
Óleos Voláteis/química
Myrtaceae/química
Monoterpenos/análise
Monoterpenos/metabolismo
Meio Selvagem
Larva/fisiologia
Cromatografia Gasosa-Espectrometria de Massas
Limites: Animais
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1008004
Autor: Prochnow, Daiane; Caron, Braulio Otomar; Heinzmann, Berta Maria; Garlet, Quelen Iane; Fontana, Daniele Cristina; Schmidt, Denise.
Título: Effect of meteorological elements on the content and composition of Aloysia triphylla (L´Hérit) Britton essential oil / Efecto de los elementos meteorológicos sobre el contenido y la composición del aceite esencial de Aloysia triphylla (L´Hérit) Britton
Fonte: Bol. latinoam. Caribe plantas med. aromát;18(3):325-335, mayo 2019. tab, ilus.
Idioma: en.
Projeto: Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul.
Resumo: The concentration and composition of an essential oil can vary according to environmental variations and seasonal periods. The objective of this study was to correlate meteorological elements with the content and concentration of components of Aloysia triphylla essential oil, for the four seasons of the year. The experiment was conducted in a plastic greenhouse of the UFSM, Frederico Westphalen campus ­ RS, Brazil, in a complete randomized blocks design during the four seasons, with three repetitions. The meteorological data were collected with the aid of a compact meteorological station, in order to characterize the environment in which the species was conducted. The evaluations were carried out at the middle date of each season. It was observed a correlation between the meteorological variables with the essential oil production and its components. According to the analysis, there influence of the temperature on the essential oil contents, considering that the maximum temperature shows a direct positive influence on the concentration of limonene and negative for spathulenol.

El contenido y la composición de un aceite esencial pueden variar según las variaciones ambientales y los períodos estacionales. El objetivo de este estudio fue correlacionar los elementos meteorológicos con el contenido y la concentración de los componentes del aceite esencial de Aloysia triphylla, para las cuatro estaciones del año. El experimento se realizó en un invernadero de plástico de la UFSM, campus de Frederico Westphalen - RS, Brasil, en un diseño completo de bloques al azar durante las cuatro estaciones, con tres repeticiones. Los datos meteorológicos se recopilaron con la ayuda de una estación meteorológica compacta, para caracterizar el entorno en el que se realizó la especie. Las evaluaciones se llevaron a cabo en la fecha media de cada temporada. Se observó una correlación entre las variables meteorológicas con la producción de aceites esenciales y sus componentes. De acuerdo con el análisis, existe una influencia de la temperatura en los contenidos de aceites esenciales, considerando que la temperatura máxima muestra una influencia positiva directa sobre la concentración de limoneno y negativa para el espatulenol.
Descritores: Estações do Ano
Óleos Voláteis/química
Verbenaceae/química
-Temperatura Ambiente
Brasil
Monoterpenos/química
Ionização de Chama
Cromatografia Gasosa-Espectrometria de Massas
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-915429
Autor: Guevara, Patricia; Reyna-Segura, Jorge; Zuñiga-Ruiz, Beatriz; Llanos-Romero, R. Enrique; Andrés-Yeves, María F; Barajas-Guzmán, María G; Echeverri, Fernando; León-Rivera, Ismael.
Título: Biocidal effect of a hexane-soluble extract of Lippia graveolens Kunth (Verbenaceae) / Efecto biocida del extracto hexánico de Lippia graveolens Kunth (Verbenaceae)
Fonte: Bol. latinoam. Caribe plantas med. aromát;17(4), jul. 2018. tab, ilus, graf.
Idioma: en.
Projeto: UNAM-DGAPA.
Resumo: Lippia graveolens Kunth (Verbenaceae) is an economically important shrub known in Mexico as Oregano. In this work, the biocidal effect of the hexane extract of L. graveolens leaves was evaluated on two crop pests. Thus, larvae of Spodoptera frugiperda were fed with mixtures of extract and artificial diet. The nematicidal activity was evaluated on juveniles of Meloydogine javanica. Regarding S. frugiperda, quantitative differences between treatments and control were observed in dead pupae, surviving adults, and deformed adults (P < 0.05). All the surviving adults from the extract treatments were deformed. Nematicidal effect was registered, the LC50 and LC90 were 0.672 (0.654-0.690) and 0.965 (0.937-0.998) mg/mL respectively. The extract was characterized by NMR and GC-MS, being thymol the most abundant component (70.6%) in addition to carvacrol (22.8%). The results suggest the consideration of the hexane extract of L. graveolens leaves within the alternatives for the biological control of pests.

Lippia graveolens Kunth (Verbenaceae) es un arbusto con importancia económica conocido en México como Orégano. En éste trabajo se evaluó el efecto biocida del extracto hexánico de hojas L. graveolens sobre dos plagas agrícolas. Así, larvas de S. frugiperda fueron alimentadas con mezclas de dieta artificial y extracto. La actividad nematicida fue evaluada en juveniles de Meloydogine javanica, Respecto a S. frugiperda, se observaron diferencias cuantitativas entre tratamiento y control en cuanto a pupas muertas, adultos sobrevivientes y adultos deformes (P < 0.05). Todos los adultos provenientes de tratamientos con extracto estuvieron malformados. Hubo efecto nematicida, calculándose CL50 y CL90 de 0.672 (0.654-0.690) y 0.965 (0.937-0.998) mg/mL respectivamente. El extracto se caracterizó por RMN y CG-EM. Los compuestos más abundantes fueron timol (70.6%), ademas del carvacrol (22.8%). Los resultados sugieren considerar al extracto hexánico de hojas de L. graveolens dentro de las alternativas para el control biológico de plagas.
Descritores: Extratos Vegetais/farmacologia
Spodoptera/efeitos dos fármacos
Folhas de Planta/química
Lippia/química
Antinematódeos/farmacologia
-Fenóis/análise
Extratos Vegetais/química
Espectroscopia de Ressonância Magnética
Controle Biológico de Vetores
Cromatografia Gasosa/métodos
Verbenaceae
Monoterpenos/análise
Larva
Antinematódeos/química
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-912588
Autor: Carvajal, Fabiola; Huanca, Andrés; González-Teuber, Marcia; Urzúa, Alejandro; Echeverría, Javier.
Título: Uses of hazardous medicinal plants: composition of the essential oil of Clinopodium gilliesii (Benth. ) Kuntze (Lamiaceae), collected in Chile / Uso de plantas medicinales peligrosas: composición del aceite esencial de Clinopodium gilliesii (Benth. ) Kuntze (Lamiaceae), recolectada en Chile
Fonte: Bol. latinoam. Caribe plantas med. aromát;16(5):486-492, sept. 2017. tab, graf, ilus.
Idioma: en.
Projeto: Comisión Nacional de Investigación Científica y Tecnología; . Universidad de Santiago de Chile; . CONICYT PAI/ACADEMIA.
Resumo: Clinopodium gilliesii (Benth.) Kuntze, harvested in the Chilean highlands, contains a surprising 93.87% of the toxic monoterpene pulegone in the essential oil. These results show remarkable differences with studies of the same species carried out in Argentina and Peru. These dissimilarities in the monoterpene composition of essential oils should be associated with differences in toxicity and biological activity of this medicinal plant used in ethnomedicine in different countries for the treatment of similar discomforts and diseases. These results are discussed considering the risk of consuming C. gilliesii, without clear recommendations and control of at least pulegone content in essential oils.

Clinopodium gilliesii (Benth.) Kuntze, recolectada en el altiplano chileno, contiene un sorprendente 93,87% del monoterpeno toxico pulegona, en el aceite esencial. Estos resultados muestran diferencias notables con estudios de la misma especie realizados en Argentina y Perú. Estas disimilitudes, en la composición de los aceites esenciales deben estar asociadas con diferencias en la toxicidad y actividad biológica de esta especie medicinal que se utiliza en etnomedicina en diferentes lugares para el tratamiento de molestias y enfermedades similares. Estos resultados se discuten considerando el riesgo de consumir C. gilliesii, sin recomendaciones claras y control de al menos el contenido de pulegona en los aceites esenciales.
Descritores: Óleos Voláteis/efeitos adversos
Óleos Voláteis/química
Lamiaceae
Monoterpenos/análise
-Plantas Medicinais
Chile
Monoterpenos/efeitos adversos
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-967299
Autor: Peixoto, Magna Galvão; Blank, Arie Fitzgerald; Blank, Maria de Fátima Arrigoni; Gagliardi, Paulo Roberto; Melo, Juliana Oliveira de; Nizio, Daniela Aparecida de Castro; Pinto, Vanderson Santos.
Título: Activity of essential oils of Lippia alba chemotypes and their major monoterpenes against phytopathogenic fungi / Atividade dos óleos essenciais de quimiotipos de Lippia alba e seus monoterpenos majoritários sob fungos fitopatogênicos
Fonte: Biosci. j. (Online);34(5):1136-1146, sept./oct. 2018.
Idioma: en.
Resumo: This work aimed to evaluate the in vitro antifungal activity of the essential oils of L. alba belonging to the carvone chemotype (LA-13 and LA-57) and the citral chemotype (LA-10, LA-29, and LA-44); the carvone enantiomers (R)-(-)-carvone and (S)-(+)-carvone; and citral on phytopathogenic fungi Lasiodiplodia theobromae (LT), Fusarium pallidoroseum (FP) and Fusarium solani (FS). Concentrations of 0.01; 0.05; 0.1; 0.2; 0.3; 0.5 and 1.0 mL/100 mL were tested, and the percentage of mycelial growth inhibition (MGI) was calculated after 96h in relation to the control. Minimal Inhibitory Concentrations (MIC) and Minimal Fungicide Concentrations (MFC) were obtained for essential oils and compounds. From the concentration of 0.2 mL/100 mL, all the accessions and carvone enantiomers were effective against the fungus LT, except the accession LA-44, for which the maximum inhibition occurred from the concentration of 0.3 mL/100 mL. Citral was the most effective compound against LT, with 100% of MGI from the concentration of 0.05 mL /100 mL. All accessions and enantiomers caused 100% of MGI against FP fungus from the concentration of 0.2 mL/100 mL. Once again, citral stood out by providing the same result as the other treatments from the concentration of 0.1 mL/100 mL. Considering the fungus FS, carvone enantiomers and citral caused 100% of MGI from the concentration of 0.1 mL/100 mL while all accessions caused 100% of MGI from the concentration of 0.2 mL/100 mL. Citral and carvone enantiomers presented the lowest MIC values (0.1 mL/100 mL) against FS fungus. The MIC of citral for LT and FP were not determined at the concentrations tested. (R)-(-)-carvone enantiomer presented the lowest MIC (0.1 mL/100 mL) for the LT fungus. Most of the other accessions presented MIC of 0.2 mL/100 mL for the three fungi. In relation to the minimum fungicidal concentration (MFC), citral stood out with values from 0.05 mL/100 mL (LT). Citral and carvone presented the same MFC for FS (0.2 mL / 100 mL). The other accessions showed MFC values from 0.3 mL/100 mL for the three fungi. Essential oils of L. alba accessions, carvone enantiomers, and citral were efficient in phytopathogen control and could be considered as an alternative to fungicides for presenting inhibitory and fungicidal effect against these microorganisms at low concentrations.

O objetivo do trabalho foi avaliar a atividade antifúngica in vitro de óleos essenciais de Lippia alba pertencentes ao quimiotipo carvona (LA-13 e LA-57) e ao quimiotipo citral (LA-10, LA-29 e LA-44); dos enantiômeros da carvona: (R)-(-)-carvona e (S)-(+)-carvona; e do citral sobre os fungos fitopatogênicos Lasiodiplodia theobromae (LT), Fusarium pallidoroseum (FP) e Fusarium solani (FS). Foram testadas as concentrações 0,01; 0,05; 0,1; 0,2; 0,3; 0,5 e 1,0 mL/100 mL, e, após 96h de incubação, a porcentagem de inibição do crescimento micelial (ICM) foi calculada em relação ao controle. Foram determinadas as Concentrações Inibitórias Mínimas (CIM) e Fungicidas Mínimas (CFM) para os óleos essenciais e compostos. A partir da concentração de 0,2 mL/100 mL todos os acessos e os enantiômeros da carvona foram efetivos contra LT, exceto o acesso LA-44, que proporcionou máxima inibição a partir da concentração de 0,3 mL/100 mL. O monoterpeno citral foi o mais efetivo contra LT, pois a partir da concentração de 0,05 mL /100 mL, 100% de ICM foi observada. Todos os acessos e enantiômeros da carvona causaram 100% de ICM contra o fungo FP, a partir da concentração de 0,2 mL/100 mL. Novamente, o composto citral de destacou por causar máxima ICM a partir da concentração de 0,1 mL/100 mL. Contra o fungo FS, os enantiômeros da carvona e o citral causaram 100% de ICM a partir da concentração de 0,1 mL/100 mL, enquanto os acessos proporcionaram mesmos resultados a partir da concentração de 0,2 mL/100 mL. O citral e os enantiômeros da carvona apresentaram os menores valores de CIM (0,1 mL/100 mL) frente ao FS. Não foi possível determinar a CIM do citral para LT e FP nas concentrações testadas. O enantiômero (R)-(-)-carvone apresentou a menor CIM (0,1 mL/100 mL) para o fungo LT. Os acessos apresentaram CIM a partir de 0,2 mL/100 mL para os três fungos. Em relação à concentração fungicida mínima (CFM), o citral se destacou com a menor CFM (0,05 mL/100 mL) para LT. Citral e carvonas apresentaram a mesma CFM para FS (0,2 mL / 100 mL). Os acessos apresentaram CFM a partir de 0,3 mL/100 mL para os três fungos. Os óleos essenciais dos acessos de L. alba, e os monoterpenos carvona e o citral foram eficientes no controle dos fungos fitopatogênicos e são considerados como uma alternativa em relação aos fungicidas sintéticos por apresentarem efeitos inibitórios e fungicidas contra esses microorganismos quando utilizados em baixas concentrações.
Descritores: Óleos Voláteis
Melissa
Lippia
Monoterpenos
Fungos
Fusarium
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-967307
Autor: Alves, Mércia Freitas; Blank, Arie Fitzgerald; Gagliardi, Paulo Roberto; Blank, Maria de Fátima Arrigoni; Nizio, Daniela Aparecida de Castro; Brito, Fabiany de Andrade; Sampaio, Taís Santos.
Título: Essential oils of Myrcia lundiana Kiaersk and their major compounds show differentiated activities against three phytopathogenic fungi / Óleos essenciais de Myrcia lundiana Kiaersk e seus compostos majoritários apresentam atividades diferenciadas sobre três fungos fitopatogênicos
Fonte: Biosci. j. (Online);34(5):1200-1209, sept./oct. 2018.
Idioma: en.
Resumo: The present study evaluated the antifungal activity of the essential oils of chemotypes of Myrcia lundiana and their major compounds on the fungi Fusarium pallidoroseum, Fusarium solani, and Colletotrichum musae. The essential oils were obtained by hydrodistillation and analyzed by GCMS/FID. For the evaluation of the antifungal activity, the essential oils and the major compounds were tested at the concentration of 0.1 mL/L until the fungicidal effect was detected. The major compounds detected in the essential oil were 1,8-cineole, isopulegol, and citral. The chemotypes (MLU-005 and MLU-019) provided 100% mycelial growth inhibition for the fungus F. pallidoroseum from the concentration of 1.1 mL/L (minimum inhibition concentration - MIC). For chemotype (MLU-022), the minimum fungicidal concentration (MFC) was 0.3 mL/L. For F. solani, the essential oils of the chemotypes (MLU-005 and MLU-019) presented MIC at concentrations of 7.0 and 5.0 mL/L, respectively. The essential oil of the chemotype (MLU-022) presented MFC of 0.6 mL/L. Different MIC was observed for the three studied chemotypes for the fungus C. musae, ranging between 0.4 mL/L, for the chemotype (MLU-005); 0.5 mL/L, for the chemotype (MLU-022); and 0.7 mL/L, for the chemotype (MLU-019). The best MFC was observed for the chemotype (MLU-005) (0.5 mL/L). The major compounds tested separately presented better MIC values when compared with their chemotypes, except for the compound 1,8-cineole, which presented lower mycelial growth inhibition for the three fungi tested, suggesting that the chemical profile or the presence of some other compound of the essential oil may inhibit the growth of the three fungi studied. The compound isopulegol provided lower MFC for the fungus C. musae (0.4517 mL/L) when compared with the fungi F. pallidoroseum and F. solani, (MFC of 0.4927 mL/L). The compound citral provided a lower MFC on the fungus C. musae (0.1668 mL/L) in relation to the other fungi tested. The essential oils of the chemotypes of M. lundiana and their major compounds showed potential to control the studied phytopathogens and can be an alternative for agriculture for presenting an inhibitory and fungicidal effect against these organisms at lower concentrations.

O presente trabalho avaliou a atividade antifúngica de óleos essenciais de quimiotipos de Myrcia lundiana dos seus compostos majoritários sobre os fungos Fusarium pallidoroseum, Fusarium solani e Colletotrichum musae. Os óleos essenciais foram obtidos por hidrodestilação e analisados por CGEM/DIC. Para avaliação da atividade antifúngica, foram testados os óleos essenciais e os compostos majoritários na concentração de 0,1 mL/L até encontrar o efeito fungicida. Os principais compostos presentes no óleo essencial foram 1,8-cineol, isopulegol e citral. Os quimiotipos (MLU-005 e MLU-019) proporcionaram 100% de inibição do crescimento micelial para o fungo F. pallidoroseum a partir da concentração de 1,1 mL/L (Concentração Inibitória Mínima ­ CIM). Para o quimiotipo (MLU-022), a melhor concentração fungicida mínima (CFM) foi de 0,3 mL/L. Para F. solani, os óleos essenciais dos quimiotipos (MLU-005 e MLU-019) apresentaram CIM nas concentrações de 7,0 e 5,0 mL/L, respectivamente. O óleo essencial do quimiotipo (MLU-022) apresentou CFM de 0,6 mL/L. Observou-se CIM diferenciado para os três quimiotipos estudados para o fungo C. musae, variando entre 0,4 mL/L, para o quimiotipo (MLU-005); 0,5 mL/L, para o quimiotipo (MLU-022); e 0,7 mL/L, para o quimiotipo (MLU-019). O quimiotipo MLU-005 apresentou o melhor CFM, 0,5 mL/L. Os compostos majoritários testados separadamente apresentaram melhores valores de CIM frente aos seus quimiotipos, exceto o composto 1,8-cineol, que apresentou menor inibição do crescimento micelial para os três fungos testados, sugerindo que o perfil químico ou a presença de algum outro composto no óleo essencial pode estar atuando na inibição do crescimento dos três fungos estudados. O composto isopulegol proporcionou menor CFM para o fungo C. musae (0,4517 mL/L) em relação aos fungos F. pallidoroseum e F. solani, para os quais apresentou CFM de 0,4927 mL/L. O composto citral proporcionou um menor CFM sobre o fungo C. musae (0,1668 mL/L), em relação aos demais fungos testados. Os óleos essenciais de quimiotipos de M. lundiana e seus compostos majoritários apresentaram potencial para o controle dos fitopatógenos estudados, podendo ser considerados como uma alternativa para a agricultura, uma vez que em concentrações mais baixas apresentaram efeito inibitório e fungicida frente a estes organismos.
Descritores: Óleos Voláteis
Colletotrichum
Myrtaceae
Monoterpenos
Fungos
Fusarium
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1021402
Autor: Rinaldi, Gustavo J; Rojano, Benjamín; Schinella, Guillermo; Mosca, Susana M.
Título: Participation of NO in the vasodilatory action of isoespintanol / Participación de NO en la acción vasodilatadora del isoespintanol
Fonte: Vitae (Medellín);26(2):78-83, 2019. Ilustraciones.
Idioma: en.
Resumo: Background: accumulating evidence suggests that natural compounds and specifically monoterpenes exert a vasodilator action. Objetive: to investigate the vascular effects of isoespintanol (2-isopropil-3,6-dimetoxi-5-metilfenol, ISO) monoterpene isolated from the leaves of Oxandra cf xylopioides. Methods: thoracic aortic rings isolated from Wistar rats were contracted with KCl 80 mM and then relaxed by exposure to Ca2+-free solution in absence and in presence of ISO 0.6 mg/mL. The force/tissue ratio (F/W) and the time to obtain 50% of relaxation (T-50) were used to assess the maximal contractile response and the relaxation, respectively. To examine the participation of NO additional experiments were performed under inhibition of nitric oxide synthase with L-NAME (L-NG-Nitroarginine methyl ester). Results: ISO significantly decreased the F/W ratio (257 ± 19 vs. 360 ± 18) and did not change T-50. In presence of L-NAME the effects of ISO on contractile response was abolished. Conclusions: these results demonstrate that ISO exerts a vasodilator effect through NO-dependent pathways and suggest that an inhibition of calcium influx could be the involved mechanism

Antecedentes: la evidencia acumulada sugiere que los compuestos naturales, especialmente monoterpenos, ejercen una acción vasodilatadora. Objetivo: investigar los efectos vasculares del monoterpeno isoespintanol (2-isopropil-3,6-dimetoxi-5-metilfenol, ISO) aislado de hojas de Oxandra cf xylopioides. Métodos: anillos de aorta torácica aislados de ratas Wistar fueron contraídas con cloruro de potasio 80 mM y luego relajadas por exposición a una solución libre de Ca2+ en ausencia y presencia de isoespintanol 0,6 µg/mL. El radio fuerza/tejido (F/T) y el tiempo para obtener 50% de relajación (T50) se usaron para lograr la máxima respuesta contráctil y de relajación, respectivamente. Para evaluar la participación del óxido nítrico, se realizaron experimentos adicionales bajo la inhibición de la óxido nítrico sintetasa con L-NAME (L-NG-éster metílico de nitroarginina). Resultados: Isoespintanol disminuyó el radio F/W significativamente (257 ± 19 vs. 360 ± 18) y no cambió T-50. En presencia de L-NAME, los efectos del isoespintanol en la respuesta contráctil fueron suprimidos. Conclusiones: Estos resultados demuestran que el isoespintanol ejerce un efecto vasodilatador a través de vías NO dependientes y sugiere que la inhibición de la entrada de calcio puede ser el mecanismo involucrado.
Descritores: Vasodilatação
Monoterpenos
-Aorta Torácica
Óxido Nítrico
Limites: Seres Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO56.3 - Biblioteca


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Soares, Maurílio José
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Id: biblio-841764
Autor: Villamizar, Luz Helena; Cardoso, Maria das Graças; Andrade, Juliana de; Teixeira, Maria Luisa; Soares, Maurilio José.
Título: Linalool, a Piper aduncum essential oil component, has selective activity against Trypanosoma cruzi trypomastigote forms at 4°C
Fonte: Mem. Inst. Oswaldo Cruz;112(2):131-139, Feb. 2017. tab, graf.
Idioma: en.
Resumo: BACKGROUND Recent studies showed that essential oils from different pepper species (Piper spp.) have promising leishmanicidal and trypanocidal activities. OBJECTIVES In search for natural compounds against Trypanosoma cruzi, different forms of the parasite were incubated for 24 h at 28ºC or 4ºC with Piper aduncum essential oil (PaEO) or its main constituents linalool and nerolidol. METHODS PaEO chemical composition was obtained by GC-MS. Drug activity assays were based on cell counting, MTT data or infection index values. The effect of PaEO on the T. cruzi cell cycle and mitochondrial membrane potential was evaluated by flow cytometry. FINDINGS PaEO was effective against cell-derived (IC50/24 h: 2.8 μg/mL) and metacyclic (IC50/24 h: 12.1 μg/mL) trypomastigotes, as well as intracellular amastigotes (IC50/24 h: 9 μg/mL). At 4ºC - the temperature of red blood cells (RBCs) storage in blood banks - cell-derived trypomastigotes were more sensitive to PaEO (IC50/24 h = 3.8 μg/mL) than to gentian violet (IC50/24 h = 24.7 mg/mL). Cytotoxicity assays using Vero cells (37ºC) and RBCs (4ºC) showed that PaEO has increased selectivity for cell-derived trypomastigotes. Flow cytometry analysis showed that PaEO does not affect the cell cycle of T. cruzi epimastigotes, but decreases their mitochondrial membrane potential. GC-MS data identified nerolidol and linalool as major components of PaEO, and linalool had trypanocidal effect (IC50/24 h: 306 ng/mL) at 4ºC. MAIN CONCLUSION The trypanocidal effect of PaEO is likely due to the presence of linalool, which may represent an interesting candidate for use in the treatment of potentially contaminated RBCs bags at low temperature.
Descritores: Tripanossomicidas/farmacologia
Trypanosoma cruzi/efeitos dos fármacos
Bioensaio
Óleos Voláteis/farmacologia
Piper/química
-Células Vero
Testes de Sensibilidade Microbiana
Cercopithecus aethiops
Temperatura Baixa
Monoterpenos/farmacologia
Cromatografia Gasosa-Espectrometria de Massas
Limites: Animais
Responsável: BR1.1 - BIREME


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Amorim, Elba Lucia Cavalcanti de
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Id: biblio-889395
Autor: Nascimento-Júnior, Braz José do; Brito, Lucas de Souza; Barros, Walquíria Nunes; Gonçalves, Daniela Marques; Matos, Luana de Souza; Nascimento, Cínthia Reyjane Borges; Ribeiro, Luciano Augusto de Araújo; Lima, Ricardo Santana de; Silva-Júnior, René Geraldo Cordeiro; Reis, Sílvio Alan Gonçalves Bomfim; Gonçalves, Talita Mota; Amorim, Elba Lúcia Cavalcanti de.
Título: Anti-inflammatory and healing action of oral gel containing borneol monoterpene in chemotherapy-induced mucositis in rats ( Rattus norvegicus )
Fonte: Braz. J. Pharm. Sci. (Online);53(3):e00081, 2017. graf, ilus.
Idioma: en.
Resumo: ABSTRACT The aim of this study was to investigate the effect of gels containing the monoterpene borneol in induced oral mucositis using an animal model. Gels were prepared with borneol at 1.2% and 2.4% (w/w). Oral mucositis was induced by administration of three doses of 5-fluorouracil (30 mg/kg, i.p.) and injury with acetic acid (50%, v/v) soaked in filter paper applied to right cheek mucosa for 60s. Four subgroups comprising 12 animals each were formed. Six animals from each group were sacrificed at days seven and fourteen after oral mucositis induction. Mucous samples were processed and stained with hematoxylin-eosin and Masson's Trichrome. The semiquantitative evaluation involved observation of inflammatory parameters. ImageJ® software was used in the quantitative evaluation. For statistical analyses, Two-way ANOVA, followed by Tukey's post-test (p <0.05), were employed. Borneol 2.4% gel proved effective in the treatment of oral mucositis with statistically significant differences between groups for angiogenesis control, inflammatory cell count reduction and percentage neoformed collagen increase. The confirmation of anti-inflammatory and healing action of borneol in oral mucositis in rats renders it a good marker for predicting this activity for plant extracts rich in this substance
Descritores: Estomatite
Monoterpenos/efeitos adversos
Géis/efeitos adversos
Anti-Inflamatórios
-Software/ética
Extratos Vegetais/agonistas
Hypericum/classificação
Limites: Animais
Masculino
Ratos
Responsável: BR40.1 - DBD - Divisão de Biblioteca e Documentacão do Conjunto das Químicas



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