Base de dados : LILACS
Pesquisa : B01.650.940.800.575.912.250.583.520.974 [Categoria DeCS]
Referências encontradas : 21 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 3 ir para página          

  1 / 21 LILACS  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1145638
Autor: Morales Vergara, Sergio Adrián.
Título: Actividad ansiolítica del extracto etanólico de las hojas de Thymus vulgaris (Tomillo) en Rattus novergicus / Anxiolytic activity of Thymus vulgaris leaf ethanolic extract in Rattus novergicus
Fonte: Rev. peru. med. exp. salud publica;3(2):85-90, 2018. tab, graf.
Idioma: es.
Resumo: Objetivo. Demostrar que la administración vía oral del extracto etanólico de las hojas de Thymus vulgaris presenta un efecto ansiolítico en Rattus novergicus (var Wistar). Materiales y métodos. Estudio experimental. Se utilizaron 50 ratas distribuidas aleatoriamente en cinco grupos de investigación: Blanco (dieta normal con administración de agua estéril); Control positivo (dieta normal con administración de clonazepam 0.25 mg/kg); Grupo I (Extracto etanólico [EE] de Thymus vulgaris 50 mg / kg); Grupo II (EE de Thymus vulgaris 100 mg / kg) y Grupo III (EE de Thymus vulgaris 200 mg / kg). El efecto ansiolítico fue evaluado mediante el modelo de laberinto en cruz elevado, calculándose los tiempos de permanencia en brazo abierto, en brazo cerrado y los números de entrada en brazo abierto y cerrado. Resultados. Se observaron diferencias significativas en la comparación de medias de los números de entrada en el brazo abierto (p= 0.012) y en el brazo cerrado (p=0.035); sin embargo, no se evidenció diferencias significativas al comparar las medias de los grupos que recibieron Thymus vulgaris y el control negativo (p>0.05). Conclusión. El extracto etanólico de las hojas del Thymus vulgaris (a dosis de 50, 100 y 200 mg/kg) no presenta un efecto ansiolítico significativo en Rattus novergicus.

Objective. To demonstrate if oral administration of Thymus vulgaris leaves ethanolic extract has an anxiolytic effect in Rattus novergicus (Wistar var). Materials and methods. An experimental study. Fifty rats were distributed randomly in five research groups: Negative control (normal diet with distilled water oral administration); Positive control (normal diet with oral administration of clonazepam 0.25 mg / kg); Group I (Thymus vulgaris ethanolic extract [EE] 50 mg / kg); Group II (Thymus vulgaris EE 100 mg / kg) and Group III (Thymus vulgaris EE 200 mg / kg). The anxiolytic effect was evaluated by elevated plus-maze model, calculating amount of time spent as well as the total number of entries on open arm and closed arm. Results. Significant differences were observed in the comparison of means of entries in the open arm (p = 0.012) and in the closed arm (p = 0.035); however, no significant differences were found on comparison of means of groups that received Thymus vulgaris EE and negative control (p> 0.05). Conclusion. The Thymus vulgaris leaves ethanolic extract (at doses of 50, 100 and 200 mg / kg) does not show a significant anxiolytic effect in Rattus novergicus.
Descritores: Ansiolíticos
Experimentação Animal
Thymus (Planta)
-Peru
Plantas Medicinais
Extratos Vegetais
Medicina Tradicional
Limites: Animais
Ratos
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


  2 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1128427
Autor: Ribeiro, A. D. B; Ferraz Junior, M. V. C; Polizel, D. M; Miszura, A. A; Barroso, J. P. R; Cunha, A. R; Souza, T. T; Ferreira, E. M; Susin, I; Pires, A. V.
Título: Effect of thyme essential oil on rumen parameters, nutrient digestibility, and nitrogen balance in wethers fed high concentrate diets / Efeito do óleo essencial de tomilho sobre os parâmetros ruminais, a digestibilidade dos nutrientes e o balanço de nitrogênio em borregos alimentados com elevado teor de concentrado
Fonte: Arq. bras. med. vet. zootec. (Online);72(2):573-580, Mar./Apr. 2020. tab, graf.
Idioma: en.
Resumo: This trial aimed to evaluate the effects of thyme essential oils (EO) on rumen parameters, nutrient digestibility and nitrogen balance in wethers fed with high-concentrate diet. Twenty rumen-cannulated wethers were blocked according to body weight (BW= 64.0±2.1kg), and received one of the following treatments: 25mg of monensin/kg of dry matter (DM; MON) or doses of thyme EO (1.25, 2.50 or 3.75g/kg of DM). The diet was composed of 90% concentrate. Thyme EO was composed mainly by thymol (46.6% of DM) and p-cymene (38.9% of DM). The nutrient intake and apparent digestibility were similar among treatments. The inclusion of 3.75g of thyme EO tended (P= 0.07) to increase butyrate compared to MON and 1.25OE and wethers fed with 1.25g of thyme EO tended (P= 0.07) to decrease ruminal pH on the 14th day compared to MON. The treatments did not affect acetate:propionate ratio, total short chain fatty acids (SCFA) and nitrogen retention. Results from this study suggest that adding thyme EO to high-concentrate diets may be used as an alternative to monensin as feed additive in feedlot lambs.(AU)

O objetivo do estudo foi avaliar os efeitos do óleo essencial (OE) de tomilho nos parâmetros ruminais, na digestibilidade e no balanço de nitrogênio em borregos alimentados com elevado teor de concentrado. Vinte borregos providos de cânulas ruminais foram blocados de acordo com o peso corporal (PC=64,0±2,1kg) e receberam um dos tratamentos: 25mg de monensina/kg de matéria seca (MS; MON) ou doses de OE de tomilho (1,25; 2,50 ou 3,75g/kg de MS). A dieta foi composta por 90% de concentrado. A composição do OE de tomilho foi principalmente timol (46,6% da MS) e p-cimeno (38,9% da MS). A ingestão e a digestibilidade dos nutrientes foram semelhantes entre os tratamentos. A inclusão de 3,75g de OE de tomilho tendeu (P=0,07) a aumentar o butirato em relação aos tratamentos MON e 1,25OE. Os borregos alimentados com 1,25g de OE tenderam (P=0,07) a apresentar menor pH ruminal no 14º dia comparado a MON. No entanto, os tratamentos não afetaram a relação acetato:propionato, concentração total de ácidos graxos de cadeia curta e retenção de nitrogênio. Os resultados sugerem que a adição de OE de tomilho em dietas com elevado teor de concentrado pode ser uma alternativa à monensina como aditivo alimentar para cordeiros em confinamento.(AU)
Descritores: Rúmen/química
Óleos Voláteis/administração & dosagem
Ovinos/metabolismo
Thymus (Planta)/química
Nitrogênio
-Monensin
Aditivos Alimentares
Limites: Animais
Masculino
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  3 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: biblio-1007815
Autor: Aneva, Ina; Trendafilova, Antoaneta; Nikolova, Milena; Todorova, Milka; Georgieva, Kristina.
Título: Essential oil composition of the Balkan endemic Thymus longedentatus (Degen & Urum. ) Ronniger / Composición del aceite esencial de Thymus longedentatus (Degen & Urum. ) Ronniger endemic de los Balcanes
Fonte: Bol. latinoam. Caribe plantas med. aromát;18(2):197-203, mar. 2019. tab, mapas.
Idioma: en.
Resumo: The chemical composition of essential oil obtained from the aerial parts of the Balkan endemic species Thymus longedentatus was studied by GC-MS. Twenty eight compounds, consisting 98.2% of the total components were detected in amounts exceeding 0.1%. The oil was characterized by relatively high concencentration of oxygentated monoterpenes (78.7%), among which citral isomers neral (27.5%) and geranial (30.3%) were the principal ones. In addition, 1,8-cineole (7.8%), trans-ß-ocimene (7.5%), and ß-myrcene (3.7%) were detected in significant ammounts. Germacrene D (4.4%) was found to be the main sesquiterpene in the essential oil.

Se estudió mediante GC-MS la composición química del aceite esencial obtenido de las partes aéreas de Thymus longedentatus, especie endémica de los Balcanes. Se detectaron veintiocho compuestos, que representaban un 98,2% del total de compuestos y que se encontraban en cantidades superiores al 0,1%. El aceite se caracterizó por una concentración relativamente alta de monoterpenos oxigenados (78.7%), entre los cuales los isómeros de citral, neral (27.5%) y geranial (30.3%) eran los principales. Además, se detectó 1,8-cineol (7,8%), trans-ß-ocimeno (7,5%) y ß-mirceno (3,7%) en cantidades significativas. Se encontró que Germacreno D (4.4%) es el principal sesquiterpeno en el aceite esencial.
Descritores: Plantas Medicinais/química
Óleos Voláteis/química
Thymus (Planta)/química
-Terpenos/análise
Óleos Voláteis/isolamento & purificação
Península Balcânica
Cromatografia Gasosa-Espectrometria de Massas
Responsável: CL1.1 - Biblioteca Central


  4 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Id: lil-781085
Autor: Rojas Armas, Juan; Ortiz Sánchez, José; Jáuregui Maldonado, José; Ruiz Quiroz, Julio; Almonacid Román, Robert.
Título: Aceite esencial de Thymus vulgaris L (tomillo), su combinación con EDTA contra Cándida albicans y formulación de una crema / Thymus vulgaris L (thyme) essential oil and its combination with EDTA against Candida albicans; formulation of a cream
Fonte: An. Fac. Med. (Perú);76(3):235-240, jul.-set.2015. tab.
Idioma: es.
Resumo: El patógeno Cándida albicans puede causar infecciones invasivas graves y frecuentes lesiones superficiales. Los fármacos usados en el tratamiento presentan inconvenientes y es necesario buscar alternativas. Objetivos. Determinar la actividad del aceite esencial (AE) de Thymus vulgaris y de su combinación con EDTA sobre Cándida albicans, y formular una crema con el AE suplementado con derivados terpénicos naturales. Diseño. Estudio experimental in vitro y toxicidad in vivo. Lugar. Facultad de Medicina y Facultad de Farmacia y Bioquímica, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico. Cepa de Cándida albicans para las pruebas in vitro y conejos para la toxicidad dérmica. Métodos. La actividad antifúngica se determinó por el método de difusión en pozo de agar; la concentración inhibitoria mínima (CIM), por el método de microdilución en caldo. La crema se formuló con el AE al 1 por ciento y otra suplementada con carvacrol, timol, citral y EDTA. La toxicidad dérmica se determinó en conejos. Principales medidas de resultados. Halos de inhibición, CIM, signos de toxicidad. Resultados. El AE a 100 mg/mL inhibió el crecimiento de Cándida albicans con halos de inhibición de 30,33 ± 0,58 mm, mientras que la adición de EDTA produjo halos de 35,33 ± 0,58 mm. La CIM para el AE y AE + EDTA fue de 8 mg/mL y 0,5 mg/mL, respectivamente. La crema con AE 1 por ciento produjo halos de inhibición de 13,33 ± 0,58 mm, mientras que la adición de EDTA, timol, carvacrol y citral aumentó el halo hasta 24,33 ± 0,58 mm. No se evidenció signos de toxicidad dérmica en conejos. Conclusiones. El AE de Thymus vulgaris presentó actividad inhibitoria sobre Cándida albicans y el EDTA incrementó dicha actividad; asimismo, el aceite esencial, EDTA, carvacrol, timol y citral formulados en una crema mostraron efecto sinérgico y sin signos de toxicidad dérmica...

Candida albicans may cause severe invasive infections and frequently superficial lesions. Drugs used in treatment present drawbacks and search of alternatives becomes necessary. Objectives: To determine the activity of Thymus vulgaris essential oil (EO) alone and combined with EDTA on Candida albicans, and formulate a cream with EO supplemented with natural terpenes. Design: In vitro experimental and in vivo toxicity study. Setting: Faculty of Medicine and Faculty of Pharmacy, Universidad Nacional Mayor de San Marcos, Lima, Peru. Biological material:Candida albicans strain for in vitro study and rabbits for dermal toxicity tests. Methods:Antifungal activity was determined by agar well diffusion method, and minimum inhibitory concentration (MIC) by broth microdilution method. A cream was formulated with EO 1 per cent and another supplemented with carvacrol, thymol, citral and EDTA. Dermal toxicity in rabbits was determined. Main outcome measures: Inhibition halos, MIC, signs of toxicity. Results: EO at 100 mg/mL inhibited Candida albicans growth with 30.33 ± 0.58 mm inhibition halos; adding EDTA produced 35.33 ± 0.58 mm halos. MIC for EO and EO + EDTA was respectively 8 mg/mL and 0.5 mg/mL. EO 1 per cent cream originated 13.33 ± 0.58 mm inhibition halos, and addition of EDTA, thymol, carvacrol and citral increased halos to 24.33 ± 0.58 mm. No signs of dermal toxicity in rabbits were observed. Conclusions:Thymus vulgaris EO showed inhibitory activity against Candida albicans and EDTA increased this activity; essential oil, EDTA, carvacrol, thymol and citral formulated in cream also showed synergistic effect without evidence of dermal toxicity...
Descritores: Antifúngicos
Candida albicans
Cremes Vegetais
Experimentação Animal
Plantas Medicinais
Thymus (Planta)
Timol/uso terapêutico
-Epidemiologia Experimental
Limites: Animais
Coelhos
Responsável: PE13.1 - Oficina de Biblioteca, Hemeroteca y Centro de Documentación


  5 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: biblio-1055118
Autor: Ribeiro, A. D. B; Ferraz Junior, M. V. C; Polizel, D. M; Miszura, A. A; Gobato, L. G. M; Barroso, J. P. R; Susin, I; Pires, A. V.
Título: Thyme essential oil for sheep: effect on rumen fermentation, nutrient digestibility, nitrogen metabolism, and growth / Óleo essencial de tomilho para ovinos: efeito na fermentação ruminal, na digestibilidade dos nutrientes, no metabolismo de nitrogênio e no crescimento
Fonte: Arq. bras. med. vet. zootec. (Online);71(6):2065-2074, Nov.-Dec. 2019. tab, graf.
Idioma: en.
Resumo: Two experiments were conducted to evaluate the effect of thyme (Thymus vulgaris) essential oil (EO) doses on rumen fermentation, nutrient digestibility, and nitrogen metabolism, as well as performance and coccidia oocyst discharge. In experiment I, 20 rumen-cannulated wethers received the experimental diets containing 80% dry matter (DM) of haylage and 20% DM of concentrate. Treatments were 25mg of monensin/kg DM or doses of 1.25, 2.50, or 3.75g of thyme EO/kg DM. In experiment II, 50 ewe lambs received the same diets from experiment I, including a diet without feed additives. Wethers fed with diets containing 1.25g/kg DM of thyme EO had higher molar proportion of propionate (P= 0.03) and butyrate (P< 0.01), and lower (P= 0.04) acetate to propionate ratio than other treatments. Adding thyme EO to diets increased (P= 0.02) nitrogen retention compared to monensin. The performance of ewe lambs was not affected (P≥ 0.05) by treatments. However, lambs fed monensin had a lower (P= 0.04) number of coccidia oocyst discharge than others. Adding 1.25g/kg DM of thyme EO in high-forage diet improved ruminal fermentation. Thyme EO enhanced nitrogen metabolism, however, it did not improve performance.(AU)

Dois experimentos foram conduzidos para avaliar o efeito de doses de óleo essencial (OE) de tomilho (Thymus vulgaris) sobre a fermentação ruminal, a digestibilidade de nutrientes e o metabolismo de nitrogênio, bem como sobre o desempenho e a descarga de oocistos de coccídeos. No experimento I, 20 ovinos canulados receberam dietas experimentais contendo 80% de matéria seca (MS) de pré-secado e 20% de MS de concentrado. Os tratamentos foram 25mg de monensina/kg de MS ou doses de 1,25, 2,50 ou 3,75g de OE de tomilho/kg de MS. No experimento II, 50 borregas receberam as mesmas dietas do experimento I, incluindo uma dieta sem aditivos. Os animais alimentados com dietas contendo 1,25g de OE de tomilho apresentaram maior proporção molar de propionato (P=0,03) e de butirato (P<0,01) e menor (P=0,04) relação acetato/propionato do que outros tratamentos. A adição de OE de tomilho nas dietas aumentou (P=0,02) a retenção de nitrogênio em comparação com a monensina. O desempenho de cordeiros não foi afetado (P≥0,05) pelos tratamentos. No entanto, cordeiros alimentados com monensina apresentaram menor (P=0,04) número de oocistos de coccídeos. A adição de 1,25g/kg de MS de OE de tomilho na dieta forrageira melhorou o perfil da fermentação ruminal. O OE de tomilho aumentou a retenção de nitrogênio, no entanto não melhorou o desempenho.(AU)
Descritores: Óleos Voláteis/uso terapêutico
Ovinos/metabolismo
Monensin
Coccidiose/prevenção & controle
Thymus (Planta)/química
Nitrogênio
-Aditivos Alimentares
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


  6 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Id: lil-780849
Autor: Radaelli, Marcela; Silva, Bárbara Parraga da; Weidlich, Luciana; Hoehne, Lucélia; Flach, Adriana; Costa, Luiz Antonio Mendonça Alves da; Ethur, Eduardo Miranda.
Título: Antimicrobial activities of six essential oils commonly used as condiments in Brazil against Clostridium perfringens
Fonte: Braz. j. microbiol;47(2):424-430, Apr.-June 2016. tab.
Idioma: en.
Resumo: Abstract Despite recent advances in food production technology, food-borne diseases (FBD) remain a challenging public health concern. In several countries, including Brazil, Clostridium perfringens is among the five main causative agents of food-borne diseases. The present study determines antimicrobial activities of essential oils of six condiments commonly used in Brazil, viz., Ocimum basilicum L. (basil), Rosmarinus officinalis L. (rosemary), Origanum majorana L. (marjoram), Mentha × piperita L. var. Piperita (peppermint), Thymus vulgaris L. (thyme) and Pimpinella anisum L. (anise) against C. perfringens strain A. Chemical compositions of the oils were determined by GC–MS (gas chromatography–mass spectrometry). The identities of the isolated compounds were established from the respective Kováts indices, and a comparison of mass spectral data was made with those reported earlier. The antibacterial activity was assessed from minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) using the microdilution method. Minimum inhibitory concentration values were 1.25 mg mL-1 for thyme, 5.0 mg mL-1 for basil and marjoram, and 10 mg mL-1 for rosemary, peppermint and anise. All oils showed bactericidal activity at their minimum inhibitory concentration, except anise oil, which was only bacteriostatic. The use of essential oils from these common spices might serve as an alternative to the use of chemical preservatives in the control and inactivation of pathogens in commercially produced food systems.
Descritores: Óleos Vegetais/farmacologia
Óleos Voláteis/farmacologia
Clostridium perfringens/efeitos dos fármacos
Antibacterianos/farmacologia
-Óleos Vegetais/análise
Brasil
Óleos Voláteis/análise
Testes de Sensibilidade Microbiana
Clostridium perfringens/crescimento & desenvolvimento
Ocimum basilicum/química
Rosmarinus/química
Origanum/química
Thymus (Planta)/química
Cromatografia Gasosa-Espectrometria de Massas
Antibacterianos/análise
Responsável: BR1.1 - BIREME


  7 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Texto completo
Id: biblio-1048565
Autor: Khalaki, Masoomeh Abbasi; Ghorbani, Ardavan; Ouri, Abazar Esmali; Shokouhian, Ali Akbar; Jafari, Ali Ashraf.
Título: Varying the vegetative and morphological traits of Thymus kotschyanus L. submitted to potassium silicate nanoparticles, superabsorbent hydrogel, effective microorganisms, and animal manure / Variação das características vegetativas e morfológ icas de thymus kotschyanus l. submetida a nanopartículas de silicato de potássio, o hidrogel superabsorvente, os microorgan ismos efetivos e o esterco animal
Fonte: Biosci. j. (Online);35(1):115-125, jan./fev. 2019. tab, ilus.
Idioma: en.
Resumo: To study the effects of some new facilitators on the vegetative and morphological traits of Thymus kotschyanus, nine treatments were tested in the experimental rangeland field at the University of Mohaghegh Ardabili, Ardabil, Iran. Treatments included control, potassium silicate nanoparticles (PSN) with two levels of 500 and 1000 mg/lit, superabsorbent hydrogel (SH) with two levels of 10 and 30 g/kg, animal manure (AM) with two levels of 100, 200 g/kg, and effective microorganisms (EM) with two levels of 1 and 2%. Data were subjected to one-way analysis of variance (ANOVA). Results of mean comparisons of treatments for Thymus kotschyanus characteristics showed that the highest amount of studied traits were observed in the treated SH 30 g/kg. These traits include plant height (19.44 cm), basal area (4.66 cm), canopy cover (99.11%), number of secondary branches (9.44) and depth of rooting (16.49 cm), aerial parts volume (26.77 cm3), root volume (17.66 cm3), aerial parts fresh weight (14.40 g), aerial parts dry weight (7.18 g), root fresh weight (3.98 g), and root dry weight (2.07 g). In general, the impact of treatments on Thymus growth traits were ranked as follows: SH 30 g/kg, PSN 1000 mg/lit, AM 200 g/kg, SH 10 g/kg, PSN 500 mg/lit, AM 100 g/kg, EM 2%, and EM 1%. In addition,the lowest plant traits were found in control. Overall, it is recommended extending the cultivation of this native medicinal plant by considering ecological conditions in each region. In addition, to promote the establishment and facilitate the growth of planted species, it is recommended using the facilitators utilized in the present work.

Para estudar os efeitos de alguns novos facilitadores sobre as características vegetativas e morfológicas de Thymus kotschyanus L., nove tratamentos foram testados no campo experimental de pastagens na Universidade de Mohaghegh Ardabili, Ardabil, Irã. Os tratamentos incluíram controle, nanopartículas de silicato de potássio (PSN) com dois níveis de 500 e 1000 mg/L, hidrogel superabsorvente (SH) com dois níveis de 10 e 30 g/kg, esterco animal (AM) com dois níveis de 100 e 200 g/kg e microorganismos efetivos (EM) com dois níveis de 1 e 2%. Os dados foram submetidos a uma análise de variância unidirecional (ANOVA). Os resultados das comparações médias dos tratamentos para as características de Thymus kotschyanus L. mostraram que a maior quantidade das características estudadas foi observada no tratamento com SH 30 g/kg. Essas características incluem altura de plantas (19,44 cm), área basal (4,66 cm), cobertura de dossel (99,11%), número de ramos secundários (9,44) e profundidade de enraizamento (16,49 cm), volume de partes aéreas (26,77 cm3), volume de raiz (17,66 cm3), peso fresco de partes aéreas (14,40 g), peso seco de partes aéreas (7,18 g), peso fresco de raiz (3,98 g) e peso seco de raiz (2,07 g). Em geral, o impacto dos tratamentos nas características de crescimento de Thymus foi classificado da seguinte forma: SH 30 g/kg, PSN 1000 mg/L, AM 200 g/kg, SH 10 g/kg, PSN 500 mg/L, AM 100 g/kg, EM 2% e EM 1%. Além disso, as características mais baixas da planta foram encontradas no controle. Em geral, recomenda-se estender o cultivo desta plantamedicinal nativa considerando as condições ecológicas em cada região. Além disso, para promover o estabelecimento e facilitar o crescimento de espécies plantadas, recomenda-se utilizar os facilitadores utilizados no presente trabalho.
Descritores: Plantas Medicinais
Thymus (Planta)
Nanoestruturas
Secas
-Hidrogel de Polietilenoglicol-Dimetacrilato
Esterco
Responsável: BR396.1 - Biblioteca Central


  8 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo SciELO Brasil
Texto completo
Texto completo
Id: biblio-1011638
Autor: Passos, Rhaysa Beatriz dos; Bazzo, Giovana Carolina; Almeida, Aline da Rosa; Noronha, Carolina Montanheiro; Barreto, Pedro Luiz Manique.
Título: Evaluation of oxidative stability of mayonnaise containing poly ε- caprolactone nanoparticles loaded with thyme essential oil
Fonte: Braz. J. Pharm. Sci. (Online);55:e18177, 2019. tab, graf.
Idioma: en.
Resumo: Suspensions of poly ε-caprolactone (PCL) nanoparticles loaded with thyme essential oil were prepared as a natural antioxidant in mayonnaise. Mean particle size was 204.9 ± 2.7 and 240.0 ± 5.5 nm respectively for nanoparticles prepared with PCL alone (NP-C) and for those loaded with thyme essential oil (NP-T). The polydispersity index indicated a homogeneous distribution of all particles, with no significant difference between NP-C and NP-T samples. The nanoparticles showed a large negative charge evidenced by zeta potential rates, indicating high physical stability. The use of PCL as a polymer provided high encapsulation efficiency for thyme essential oil (91.15 ± 2.12 %). DPPH (2,2-diphenyl-1-picrylhydrazyl) method determined IC50 rates were 476.4 ± 33.6 and 483.5 ± 20.4 µg mL-1respectively for unencapsulated oil and for NP-T, evidencing pronounced antioxidant activity. NP-C, NP-T and synthetic antioxidant butylhydroxytoluene (BHT) were applied to samples of mayonnaise and their oxidative stability evaluated for eight days in an oven at 63 ± 3ºC. Results of hydroperoxide value (HP) and thiobarbituric acid reactive substances (TBARS) showed that NP-T had a similar performance as synthetic antioxidant BHT in the prevention of mayonnaise lipid oxidation
Descritores: Óleos Voláteis/administração & dosagem
Thymus (Planta)/classificação
Oxidação/prevenção & controle
Antioxidantes/efeitos adversos
-Hidroxitolueno Butilado/análise
Aromaterapia/métodos
Nanopartículas
Responsável: BR40.1 - DBD - Divisão de Biblioteca e Documentacão do Conjunto das Químicas


  9 / 21 LILACS  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
Texto completo
Id: biblio-914337
Autor: Salgado, Ana Paula Soares Pinto; Cardoso, Maria das Graças; Castro, Evaristo Mauro de; Machado, Samísia Maria Fernandes; Guimarães, Luiz Gustavo de Lima; Andrade, Milene Aparecida; Passos, Luiz Oliveira.
Título: Caracterização química e anatômica de folhas de tomilho provenientes de plantas submetidas a diferentes condições luminosas / Characterization chemical and anatomical thyme leaves from plants subjected to different lighting conditions
Fonte: Biosci. j. (Online);28(6):929-937, nov./dec. 2012. tab, ilus.
Idioma: pt.
Resumo: Várias espécies de plantas possuem capacidade de desenvolver folhas com anatomias distintas quando cultivadas em diferentes condições de luz, as quais influenciam diretamente o crescimento e o desenvolvimento das mesmas, causando alterações morfofisiológicas. Diante da falta de informação a respeito de como o fator ambiental interfere sobre a fisiologia do desenvolvimento e do metabolismo das plantas de Thymus vulgaris, este trabalho objetivou estudar os efeitos das intensidades luminosas de 100, 50 e 30%, na produção e no teor de timol de seu óleo essencial, em sua anatomia foliar e na produtividade de biomassa fresca. Maiores rendimentos de óleo essencial foram encontrados para os níveis de irradiância de 100 e 50%. Para as análises anatômicas observa-se que quanto maior o índice de irradiância maiores espessura do limbo foliar, do mesofilo e das faces adaxial e abaxial são alcançadas, resultando maior produção de biomassa fresca.

Several plant species are capable of developing leaves with distinct anatomies when grown under different light conditions, which directly influence their growth and development and cause morphophysiological changes. Given the lack of information about how the environmental factors interfere with the physiology of development and metabolism of Thymus vulgaris plants, this study investigated the effects of light intensities of 100, 50 and 30% on the production and thymol content of the essential oil, on their leaf anatomy and on the productivity of fresh biomass. Higher yields of oil were found for levels of irradiance of 100 and 50%. Greater leaf, mesophyll and adaxial and abaxial thicknesses were achieved with a higher irradiance index, resulting in a higher production of fresh biomass.
Descritores: Luz Solar
Timol
Fenômenos Fisiológicos Vegetais
Biomassa
Thymus (Planta)
Responsável: BR396.4


  10 / 21 LILACS  
              first record previous record
seleciona
para imprimir
Fotocópia
Silva, Maria do Rosário Rodrigues
Texto completo
Texto completo
Id: biblio-913233
Autor: Nunes, Reginaldo Teixeira; Silva, Maria do Rosário Rodrigues; Abrão, Fernando Yano; Fernandes, Orionalda de Fátima Lisboa; Sá, Fabyola Amaral da Silva; Hasimoto e Souza, Lúcia Kioko.
Título: Effects of the essential oil of Thymus vulgaris L. Against Cryptococcus neoformans
Fonte: Rev. patol. trop;45(3):273-284, set. 2016. tab, graf.
Idioma: en.
Resumo: Cryptococcus neoformans is an encapsulated yeast found in the environment, responsible for causing of meningoencephalitis in patients with a compromised immune system. In Brazil, cryptococcosis is the second cause of death among systemic mycoses. The limited efficacy of the available antifungal drugs used in its treatment has encouraged the search for therapeutic alternatives, such as medicinal plants. Thymus vulgaris, popularly known as thyme, is an aromatic plant whose essential oil (EO) possesses antifungal properties. The aim of this study was to assess the action of T. vulgaris EO on C. neoformans clinical isolates. This oil was analyzed by gas chromatography/mass spectrometry (GC/MS), which showed that its main components were thymol, ρ-cymene and linalool. Microdilution broth tests showed that this EO was effective against fungal isolates, with minimum inhibitory concentrations (MICs) ranging from 32 to 128 µg/mL. In vitro interaction tests between this oil and fluconazole (FCZ) showed no potentiation of the antifungal action of this drug. Its effect on mitochondrial metabolism of fungal cells was also evaluated and results demonstrated alterations on the mitochondrial enzyme activity of fungal cells only at concentrations >1,024 µg/mL. The results of the action of this EO on human erythrocytes indicated that it has low cytotoxic activity at MIC values. This investigation describes the antifungal action of T. vulgaris, showing its potential in the development of alternatives in the treatment of C. neoformans
Descritores: Cryptococcus neoformans
-Thymus (Planta)
Antifúngicos
Responsável: BR816.9



página 1 de 3 ir para página          
   


Refinar a pesquisa
  Base de dados : Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde