HPLC Analysis of Gallic and Ellagic Acids in European Oakwood (<i>Quercus robur</i>L.) and Eucalyptus<i>(Eucalyptus globulus)</i>

Charrier, Bertrand; Marques, Marina Gabriela; Haluk, J. P.

doi:10.1515/hfsg.1992.46.1.87

Cited by 32 publications

(16 citation statements)

References 6 publications

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“…Among the different Eucalyptus species, the wood of E. globulus is the most economically-important raw material for paper pulp production in Spain. Published studies on the chemical composition of extractives from E. globulus wood refer mainly to the more polar fraction containing phenols and polyphenols (Yazaki and Hillis 1976;Charrier et al 1992;Conde et al 1995). Studies referring to the composition of lipophilic extractives from E. globulus wood have been scarce and only the occurrence of several free and esterified fatty acids, hydrocarbons and sitosterol were reported (Swan and Åkerblom 1967).…”

Section: Introductionmentioning

confidence: 99%

Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood

Gutiérrez¹,

Río²,

González-Vila³

et al. 1999

Holzforschung

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SummaryThe composition of lipophilic extractives in the chloroform soluble fraction of the acetone extract from Eucalyptus globulus wood has been examined. The lipid extract was fractionated by solid-phase extraction on aminopropyl-phase cartridges into four different fractions of increasing polarity. The total lipid extract and the resulting fractions were analyzed by gas chromatography and gas chromatography-mass spectrometry, using high temperature capillary columns. The main compounds identified included sterols, sterol esters, fatty acids, steroid ketones, hydrocarbons and triglycerides. Minor compounds such as fatty alcohols, mono-and diglycerides, waxes and tocopherols were also identified among the lipids from E. globulus wood.

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Section: Introductionmentioning

confidence: 99%

Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood

Gutiérrez¹,

Río²,

González-Vila³

et al. 1999

Holzforschung

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“…This wood also contains a large amount of polyphenols 2 . Article e-mail: salemos@ufu.br Polyphenol studies were carried out using classical chemical techniques [3][4][5][6][7] associated with modern high performance liquid chromatography (HPLC) [8][9][10][11][12][13] and high resolution liquid and solid state 13 C-NMR 11,14,15 and FTIR spectroscopies.…”

Section: Introductionmentioning

confidence: 99%

Studies on polyphenols and lignin of Astronium urundeuva wood

Morais¹,

Nascimento²,

Queiroz³

et al. 1999

J. Braz. Chem. Soc.

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Uma amostra da madeira de aroeira preta (Astronium urundeuva) moída em moinho de bolas foi extraída, sucessivamente, com benzeno, benzeno:etanol (2:1, vv -1 ), clorofórmio e água num soxhlet. A madeira extraída foi secada ao ar livre resultando o resíduo A que, em seguida, foi extraído com acetona:água (9:1, vv -1 ), também num soxhlet. Do extrato resultante foi obtida a lignina de madeira moída (MWL). Não considerando a MWL, a soma de todos os extratos alcançou 18,19% da madeira seca. O conteúdo em lignina de Klason de A e o conteúdo de grupos metoxila da MWL foram 23,84% e 19,00%, respectivamente. Outra amostra de A apresentou conteúdos em polissacarídeos de difícil e fácil hidrólise de 34,86% e 18,81%, respectivamente. Uma Segunda amostra de madeira moída foi submetida a uma extração única com metanol, à temperatura ambiente, fornecendo o extrato metanólico B (23,85% da madeira seca). Espectros de RMN do

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“…También documentaron que el ácido tánico junto con otros polifenoles, tales como quercetina y ácido elágico, pueden inhibir la bomba de protones presente en las células parietales y así participar en la protección del estómago contra agentes nocivos. En el mismo estudio, Gharzouli et al (1999) protection agents against oxidative damage of lipids and proteins (Charrier, Marques, & Haluk, 1992).…”

Section: Nutracéuticos Provenientes Del Encinounclassified

“…Estudios sobre la composición química de Quercus infectoria G. Oliver, tradicionalmente utilizada para el tratamiento de heridas o quemaduras asociadas con infecciones bacterianas, han reportado galotaninos y ácido elágico (Figura 1) en una proporción de 60 a 70 % (Shariatifar, Fathabad, Khaniki, & Nasrabadi, 2014). Se ha reportado que estos compuestos tienen actividad astringente, antidiabética, anestésica local, antibacteriana, antiviral y antinflamatoria, y que actúan como buenos agentes de protección contra el daño oxidativo de los lípidos y proteínas (Charrier, Marques, & Haluk, 1992).…”

Section: Nutracéuticos Provenientes Del Encinounclassified

Encinos mexicanos, un recurso no maderable con potencial para elaborar bebidas tipo Kombucha

Vázquez-Cabral¹,

Moreno‐Jiménez²,

Rocha‐Guzmán³

et al. 2015

Rev Cha Se Cie For y del Amb

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O aks (Quercus spp.) are some of the world's most important and abundant trees in nearly all temperate forests of the northern hemisphere. There are two diversity centers for this genus: one is in Southeast Asia, and the other is in Mexico. Studies on the use of oak have mainly highlighted its timber applications. However, its non-timber value is still unappreciated. Ethnobotanical tradition shows infusions from Quercus leaves, alone or in combination with other plants, which have anticarcinogenic effects in gastric cancer patients. Sensorial studies on oak herbal infusions have shown that a higher phenolic content decreases their acceptability. Therefore, a significant alternative for encouraging use of herbal teas is fermentation with the Kombucha culture (black tea fungus). Kombucha drink is reported as a potential health promoter. It is a slightly acidic beverage from fermentation of sweetened black tea with Kombucha consortium, which consists mainly of acetic acid bacteria and yeasts. The phenolic composition and content gradually changes over fermentation time, producing a beverage rich in antioxidants. Metabolic conversion of polyphenols may be due to glucuronidation of original flavonoid compounds. This process enhances the bioavailability of phytochemicals, which include a wide range of bioactive ellagitannins and flavonoids, in oaks. ResumenL os encinos (Quercus spp.) son algunos de los árboles más importantes y abundantes en casi todos los bosques templados del hemisferio norte. El sudeste asiático y México destacan como centros de diversidad del género. La investigación sobre el encino se ha enfocado principalmente en sus aplicaciones maderables, siendo poco reconocido su valor como recurso no maderable. La tradición etnobotánica muestra que las infusiones de hojas de encino, solas o combinadas con otras plantas, presentan efectos contra el cáncer gástrico; sin embargo, el análisis sensorial de las infusiones ha mostrado relación inversa entre su aceptabilidad y su contenido fenólico. Por lo anterior, el hongo del té (Kombucha) es una alternativa para fermentar infusiones de encino, mejorando su aceptabilidad y carácter profiláctico. La bebida Kombucha es ligeramente ácida debido a que se prepara a partir de té negro endulzado que es fermentado por el consorcio microbiano Kombucha. El consorcio se forma por bacterias ácido acéticas y levaduras que cambian gradualmente la composición fenólica del sustrato, produciendo una bebida rica en antioxidantes. La conversión metabólica de los polifenoles puede deberse a su glucuronidación, que es un proceso que libera y realza la biodisponibilidad de los fitoquímicos presentes en el encino, incluyendo elagitaninos y flavonoides bioactivos.

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HPLC Analysis of Gallic and Ellagic Acids in European Oakwood (Quercus roburL.) and Eucalyptus(Eucalyptus globulus)

Cited by 32 publications

References 6 publications

Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood

Chemical Composition of Lipophilic Extractives from Eucalyptus globulus Labill. Wood

Studies on polyphenols and lignin of Astronium urundeuva wood

Encinos mexicanos, un recurso no maderable con potencial para elaborar bebidas tipo Kombucha

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