Influência da temperatura de secagem sobre o rendimento e a composição química do óleo essencial de Tanaecium nocturnum (barb. Rodr.) bur. &amp; K. Shum

Pimentel, F. A.; Cardoso, María das Graças; Zacaroni, Lidiany Mendonça; Andrade, Milene Aparecida; Guimarães, Luiz Gustavo de Lima; Salgado, Ana Paula Soares Pinto; Freire, Juliana Mesquita; Muniz, Fabiana Rezende; Morais, Augusto Ramalho de; Nelson, David Lee

doi:10.1590/s0100-40422008000300011

Cited by 8 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…com densidade de 1,008 g/cm 3 . Pimentel et al (2008) identificaram doze compostos na constituição química do óleo essencial das folhas frescas de Tanaecium nocturnum perfazendo um total de 94,37% de sua constituição, sendo o benzaldeído (74,70%) o constituinte majoritário, seguido pelo álcool benzílico (7,89%), mandelonitrila (3,96%), benzoato de benzila (3,28%) e de outros compostos presentes em concentrações inferiores a 1%. A presença destes constituintes no óleo essencial desta espécie vegetal também tem sido relatado por Gottlieb (1981) e Fazolin et al (2007).…”

Section: Resultsunclassified

See 1 more Smart Citation

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

et al. 2010

Self Cite

View full text Add to dashboard Cite

RESUMONeste trabalho, avaliou-se a capacidade fungitóxica do óleo essencial de folhas frescas de Tanaecium nocturnum sobre o Aspergillus flavus isolado da castanha-do-brasil, por meio das técnicas de contato e fumigação. Pelos resultados dos bioensaios realizados até 10 dias de incubação, verificou-se que a inibição total do crescimento micelial ocorreu quando se utilizou o óleo essencial nas concentrações de 782 ppm (técnica de contato) e 1000 ppm (técnica de fumigação). Em ambas as técnicas, o óleo essencial inibiu a esporulação a partir da concentração de 500 ppm. Observou-se que nos cinco primeiros dias de incubação não houve diferença significativa nos resultados apresentados pelas duas técnicas estudadas, havendo a partir daí uma redução da atividade do óleo essencial nas concentrações inferiores a 1000 ppm pelo teste de fumigação. A ação fungitóxica do óleo essencial sobre o microrganismo estudado pode ser atribuída à presença do benzaldeído (composto majoritário do óleo essencial estudado), em associação com outros compostos também presentes nesse óleo essencial, tais como; álcool benzílico, benzoato de benzila e mandelonitrila.

show abstract

Section: Resultsunclassified

“…A pesagem foi realizada com três repetições em balança analítica com precisão de 0,1 mg (Schoch e Leach, 1964;Mohsenin, 1970). O óleo essencial foi submetido à caracterização química por Pimentel et al (2008).…”

Section: Introductionunclassified

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similar results were obtained for lemongrass essential oil, whose yield increased with an increase in the drying temperature [ 28 ]. The effect of drying temperature on the yield of the essential oil of Tanaecium nocturnum was evaluated by Pimentel et al and the authors concluded that the increase on drying temperature (30–40 °C) did not affect the oil content, but caused losses and variations in the amounts of its compounds [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Optimal Extraction of Ocimum basilicum Essential Oil by Association of Ultrasound and Hydrodistillation and Its Potential as a Biopesticide Against a Major Stored Grains Pest

et al. 2020

View full text Add to dashboard Cite

The essential oil of basil (Ocimum basilicum) has significant biological activity against insect pests and can be extracted through various techniques. This work aimed to optimize and validate the extraction process of the essential oil of O. basilicum submitted to different drying temperatures of the leaves and extracted by the combination of a Clevenger method and ultrasound. The biological activity of the extracted oil under different conditions was evaluated for potential control of Sitophilus zeamais. The extraction method was optimized according to the sonication time by ultrasound (0, 8, 19, 31 and 38 min) and hydrodistillation (20, 30, 45, 60 and 70 min) and drying temperature (20, 30, 45, 60 and 70 °C). The bioactivity of the essential oil was assessed against adults of S. zeamais and the effects of each variable and its interactions on the mortality of the insects were evaluated. The best yield of essential oil was obtained with the longest sonication and hydrodistillation times and the lowest drying temperature of leaves. Higher toxicity of the essential oil against S. zeamais was obtained by the use of ultrasound for its extraction. The identification and the relative percentage of the compounds of the essential oil were performed with a gas chromatograph coupled to a mass selective detector. The performance of the method was assessed by studying selectivity, linearity, limits of detection (LOD) and quantification (LOQ), precision and accuracy. The LOD and LOQ values for linalool were 2.19 and 6.62 µg mL−1 and for estragole 2.001 and 6.063 µg mL−1, respectively. The coefficients of determination (R2) were >0.99. The average recoveries ranged between 71 and 106%, with coefficient of variation ≤6.4%.

show abstract

“…In parallel with the extractions, a humidity test was carried out, according to Pimentel et al (2008), for a further calculation of the extraction yield. Five grams of each plant material (fresh leaves and fresh branches) were used, submerged in 50 mL cyclohexane in a round bottom glass flask with capacity 250 mL, which was coupled to a condenser with a Dean Stark apparatus (distillation trap).…”

Section: Extraction Of the Essential Oilsmentioning

confidence: 99%

Comparison of leaf anatomy and essential oils from

et al. 2014

View full text Add to dashboard Cite

Background: Drimys brasiliensis Miers is native to Brazil, where it is mainly found in montane forests and flooded areas in the South and Southeast regions of the country. The objectives of the present study were to compare the leaf anatomy and the chemical constitution of the essential oils from D. brasiliensis present in two altitude levels (1900 and 2100 m), in a Montane Cloud Forest, in Itamonte, MG, Brazil.Results: A higher number of sclereids was observed in the mesophyll of the leaves at 1900 m altitude. At 2100 m, the formation of papillae was observed on the abaxial surface of the leaves, as well as an increase in the stomatal density and index, a reduction in leaf tissue thickness, an increase in the abundance of intercellular spaces in the mesophyll and an increase in stomatal conductance and in carbon accumulation in the leaves. Fifty-nine constituents have been identified in the oils, with the predominance of sesquiterpenes. Two trends could be inferred for the species in relation to its secondary metabolism and the altitude. The biosyntheses of sesquiterpene alcohols at 1900 m, and phenylpropanoids and epi-cyclocolorenone at 2100 m, were favored. Conclusions: D. brasiliensis presented a high phenotypic plasticity at the altitude levels studied. In relation to its leaf anatomy, the species showed adaptive characteristics, which can maximize the absorption of CO 2 at 2100 m altitude, where a reduction in the partial pressure of this atmospheric gas occurs. Its essential oils presented promising compounds for the future evaluation of biological potentialities.

show abstract

Influência da temperatura de secagem sobre o rendimento e a composição química do óleo essencial de Tanaecium nocturnum (barb. Rodr.) bur. & K. Shum

Cited by 8 publications

References 13 publications

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

Ação fungitóxica do óleo essencial de Tanaecium nocturnum (Barb. Rodr.) Bur. e K. Shum sobre o Aspergillus flavus isolado da castanha-do-Brasil (Bertholletia excelsa)

Optimal Extraction of Ocimum basilicum Essential Oil by Association of Ultrasound and Hydrodistillation and Its Potential as a Biopesticide Against a Major Stored Grains Pest

Comparison of leaf anatomy and essential oils from

Contact Info

Product

Resources

About