Influência da secagem sobre o rendimento e composição química dos compostos voláteis das raízes de Piper piscatorum Trel. &amp; Yunck. (Piperaceae)

Pimentel, F. A.; Cardoso, María das Graças; Andrade, Milene Aparecida; Zacaroni, Lidiany Mendonça; Guimarães, Luiz Gustavo de Lima

doi:10.1590/s0100-40422012000400011

Cited by 8 publications

(6 citation statements)

References 11 publications

(13 reference statements)

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“…According to Venskutonis (1997), depending on the drying method, the biological structure of the oil gland trichomes of some Lamiaceae species can be strongly affected. One way to consider the yield on dry weight basis without the risk of losing EO is to extract the oil from fresh material and to determine the moisture content, as already described in the literature (Pimentel et al, 2012). The EO yields obtained from H. ringens showed a dependence on seasonality, which has also been described in previous studies for other species of Lamiaceae (Gazim et al, 2010).…”

Section: Discussionsupporting

confidence: 61%

Seasonal variability of the essential oil of Hesperozygis ringens (Benth.) Epling.

et al. 2016

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This study was developed to evaluate the effect of seasonality on the yield and chemical composition of the essential oil (EO) of Hesperozygis ringens (Benth.) Epling, a native species from the Brazilian Pampa. Leaves were collected from four specimens of a single population in each of the four seasons for a year and were extracted in triplicate by hydro-distillation for 2 hours. The yield of EO (% w/w) was calculated on fresh weight basis (FWB), and the 16 oil samples were analyzed by gas chromatography coupled to mass spectrometry (GC-MS) and gas chromatography with flame ionization detector (GC-FID). Hierarchical Cluster Analysis (HCA) and Principal Component Analysis (PCA) were used as statistical tools to evaluate differences in chemical composition. The highest yields were obtained in autumn, spring and summer (2.32-4.38%), while the lowest yields were detected in winter, ranging from 1.15 to 1.91%. Oxygenated monoterpenoids were the predominant class of chemical constituents in the EO obtained in all seasons, showing the highest contents in autumn and summer, and pulegone was identified as a major compound, whose contents varied between 54.13 and 81.17%. The EO samples were divided into three chemical groups by HCA and PCA and were assigned to the same group, except for the three samples gathered in winter. The results showed a seasonal influence on the yield and chemical composition of the EO.Keywords: Lamiaceae, "espanta-pulga", pulegone, oxygenated monoterpenoids. Variabilidade sazonal do óleo essencial deHesperozygis ringens (Benth.) Epling. ResumoEste estudo foi desenvolvido a fim de avaliar o efeito da sazonalidade no rendimento e composição química do óleo essencial (OE) de Hesperozygis ringens (Benth.) Epling., uma espécie nativa do Pampa brasileiro. Folhas foram coletadas de quatro indivíduos de uma mesma população, em cada uma das quatro estações de um ano, e foram extraídas em triplicada por hidrodestilação durante 2 horas. O rendimento do OE (% m/m) foi calculado considerando a base fresca (BF) e as 16 amostras de óleo foram analisadas por cromatografia gasosa acoplada à espectrometria de massas (CG-EM) e cromatografia gasosa com detector de ionização de chamas (CG-DIC). Análise Hierárquica de Cluster (AHC) e Análise de Componentes Principais (ACP) foram utilizadas como ferramentas estatísticas para avaliar as diferenças na composição química. Os maiores rendimentos foram obtidos no outono, primavera e verão (2,32-4,38%), enquanto que os menores foram detectados no inverno, variando de 1,15 até 1,91%. Os monoterpenoides oxigenados foram a classe predominante dos constituintes do OE obtido em todas as estações, apresentando os maiores teores no outono e no verão, e a pulegona foi identificada como o constituinte majoritário, cujos teores variaram entre 54,13 e 81,17%. As amostras de OE foram divididas em três grupos químicos por AHC e ACP e foram classificadas no mesmo grupo, com exceção de três amostras coletadas no inverno. Os resultados demonstraram influência sazonal no rendimento e...

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Section: Discussionsupporting

confidence: 61%

Seasonal variability of the essential oil of Hesperozygis ringens (Benth.) Epling.

et al. 2016

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“…Therefore, the analysis of the temperature effect was performed in isolation. The drying temperature influenced the essential oil yield, with a decrease between 35 and 55 °C, which corroborates the results obtained by Pimentel et al (2012), who reported a decrease in Piper piscatorum essential oils when the drying temperature was increased from 30 to 40 °C. Barbosa et al (2006) subjected Lippia alba to air temperatures that varied from room temperature (25 °C) to 80 °C, and they observed a decrease in the essential oil content from 12 to 17% in comparison with that obtained for the fresh plant.…”

Section: Resultssupporting

confidence: 90%

“…According to Pimentel, Cardoso, Andrade, Zacaroni, and Guimarães (2012), the essential parameters for the quality of the raw material can vary depending on its origin.…”

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confidence: 99%

Influence of Drying in Hyptis pectinata Essential Oil

Branquinho¹,

Silva²,

Resende³

et al. 2018

JAS

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The present study assessed the effects of drying at different temperatures (35, 45 and 55 °C) and air velocities (1 and 2 m s -1 ) on the content and chemical characteristics of Hyptis pectinata essential oil. Drying was conducted in a fixed-bed dryer, and the temperatures and air velocities were controlled and recorded by an automated system. A 350±0.12 g quantity of fresh leaves was used for each of the four repetitions in each dryer. From the material obtained after drying, 60 g of each repetition was used to extract essential oil by the hydrodistillation method. Dichloromethane was used as the solvent, and anhydrous sodium sulfate was used as the desiccating agent. Gas chromatography in the forms of GC-MS and GC-FID were used for the chemical characterization of the essential oil compounds. Decreasing drying times and decreasing concentrations of essential oils were observed with increasing temperatures. A GC-MS analysis of the essential oil from H. pectinata leaves led to the identification of 19 compounds. A sesquiterpene called caryophyllene oxide was the most abundant compound under all drying conditions, with the highest concentration at a temperature of 55 °C, ranging from approximately 42 to 53%.

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“…A variável analisada foi o rendimento de OE (m/m%) transformado para arcosseno anteriormente à análise estatística. (PIMENTEL et al, 2012;AMARAL et al, 2015).…”

Section: Análise Estatísticaunclassified

“…Estudos da literatura indicam, no entanto, que, mesmo que os OE estejam armazenados em células internas, a análise de métodos alternativos de secagem deve ser realizada (COSTA et al, 2005;PIMENTEL et al, 2012;RAHIMMALEK;GOLI, 2013). Costa et al (2005) relataram o uso do desumidificador como método eficiente para a secagem do material vegetal antes da Diferentes letras maiúsculas indicam diferenças significativas de rendimento entre os grupos e diferentes letras minúsculas indicam diferenças significativas entre os rendimentos dentro do mesmo grupo, pelo teste de Tukey (P<0,05).…”

Section: Al 2015)unclassified

ANÁLISE DO EFEITO DA SAZONALIDADE SOBRE O RENDIMENTO DO ÓLEO ESSENCIAL DAS FOLHAS DE Nectandra grandiflora Nees1

et al. 2015

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RESUMO -Este estudo teve por objetivos avaliar o efeito da sazonalidade sobre o teor de óleo essencial (OE) presente nas folhas de Nectandra grandiflora Nees e determinar se a secagem do material vegetal à temperatura ambiente influencia o rendimento do OE. Para tanto, foi coletado material vegetal de 12 indivíduos ao longo de um ano, e o OE foi extraído separadamente de folhas frescas e folhas secas, pelo método de hidrodestilação. Paralelamente, 20 g de folhas frescas foram levados à estufa a 40 °C até peso constante, para determinação do teor de umidade, procedimento esse realizado para cada coleta, individualmente. O rendimento de OE das folhas (% m/m) foi calculado para o material vegetal fresco com base em massa de matéria seca, determinado considerando o teor de umidade, bem como para o material seco à temperatura ambiente. Os dados de rendimento foram analisados através do teste de Tukey (P<0,05). Os resultados mostraram que o teor de OE das folhas da espécie apresentou variabilidade sazonal, com a maior produção detectada na primavera (0,75 ± 0,06%). Esse valor foi estatisticamente diferente dos rendimentos encontrados nas outras estações do ano, sendo o menor rendimento obtido no inverno (0,39 ± 0,02%). Desse modo, indicase que a coleta de folhas de N. grandiflora seja realizada durante a primavera, visando obter maior teor de OE. Adicionalmente, verificou-se que não há perda de teor OE durante o processo de secagem à temperatura ambiente e, dessa forma, esse procedimento pós-colheita poderá vir a ser adotado sem comprometer o rendimento do extrativo.Palavras-chave: Extrativos vegetais; Lauraceae; Produtos florestais não madeireiros. ANALYSIS OF THE SEASONALITY EFFECT ON THE ESSENTIAL OIL YIELD OF LEAVES OF Nectandra grandiflora NeesABSTRACT -This study aimed to evaluate the effect of seasonal variability on the yield of essential oil (EO) present in leaves of Nectandra grandiflora Nees and as well as to determine whether the drying process at room temperature of the plant material influences the yield of this EO. Plant material was collected from 12 individuals over a year and EO was extracted by hydrodestillation separately from fresh and dried leaves. Simultaneously, 20 g of fresh leaves was taken to stove at 40 ºC to constant weight for determination of moisture content. This procedure was performed for each collection individually. The yield of EO in leaves (% w/w) was calculated for fresh plant material based on dry matter, determined by considering the moisture content, as well as for the material dried at room temperature. The yields were analyzed by Tukey test (P<0.05). Results

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Influência da secagem sobre o rendimento e composição química dos compostos voláteis das raízes de Piper piscatorum Trel. & Yunck. (Piperaceae)

Cited by 8 publications

References 11 publications

Seasonal variability of the essential oil of Hesperozygis ringens (Benth.) Epling.

Seasonal variability of the essential oil of Hesperozygis ringens (Benth.) Epling.

Influence of Drying in Hyptis pectinata Essential Oil

ANÁLISE DO EFEITO DA SAZONALIDADE SOBRE O RENDIMENTO DO ÓLEO ESSENCIAL DAS FOLHAS DE Nectandra grandiflora Nees1

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