Composition and antioxidant activity of essential oils from Oregano plants grown wild in Greece

Lagouri, Vasiliki; Blekas, George; Tsimidou, Maria Z.; Kokkini, Stella; Boskou, Dimitrios

doi:10.1007/bf01202694

Cited by 220 publications

(132 citation statements)

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“…It has been clearly demonstrated in numerous model systems that plant phenolic compounds have antioxidative properties (Schwarz et al, 2001). Previous investigations proved the strong phenolic character of essential oils from oregano (Origanum vulgare L.) (Lagouri et al, 1993;Milos et al, 2000;Vichi et al, 2001), thyme (Thymus vulgaris L.) (Schwarz and Ernst, 1996), wild thyme (Thymus serpyllum L.) (Mailhebiau, 1994) and savory (Satureja montana L.) (Radonic and Milos, 2003). On the other hand, the Satureja cuneifolia essential oil (of Croatian origin) was found to contain a low percentage of phenolic compounds (Milos et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Many sources of antioxidants of plant origin have been studied in recent years and numerous types of antioxidants with varied activities were identified (Lagouri et al, 1993;Tsimidou and Boskou, 1994, Milos et al, 2000, Radonic and Milos, 2003. It has been clearly demonstrated in numerous model systems that plant phenolic compounds have antioxidative properties (Schwarz et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Thymol and carvacrol, which were the main components of essential oils of Origanum vulgare L. spp. hirtum, Thymus vulgaris L., Thymus serpyllum L. and Satureja montana L., can be effective in the inhibition of lard autoxidation at 35 o C at a concentration of 0.1% (Lagouri et al, 1993). Lagouri and Boskou (1996) concluded that the inhibition of oxidation by the essential oils from plants of the oregano species was highly dependent on the content of carvacrol and thymol.…”

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Inhibition of lard oxidation by fractions of different essential oils

Kulišić¹,

Radonić²,

Miloš³

2005

Grasas y Aceites

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RESUMENInhibición de la oxidación de la manteca de cerdo por fracciones de diferentes aceites esenciales.Se examinó la capacidad de los aceites esenciales de Origanum vulgare L. spp. hirtum, Thymus vulgaris L., Thymus serpyllum L., Satureja montana L. y Satureja cuneifolia Ten. para inhibir la oxidación de la manteca de cerdo pura. Excepto Satureja cuneifolia Ten., todos los aceites esenciales mostraron un acusado perfil fenólico caracterizado por la presencia de fenoles monoterpéni-cos-timol y carvacrol. El método Rancimat ha sido aplicado a manteca de cerdo sembrada con los aceites esenciales y sus fracciones. La capacidad de los aceites y sus fracciones para actuar como inhibidores de la oxidación de lípidos fue menor en comparación con la de antioxidante sintéticos (BHA y BHT), ácido ascórbico y α-tocoferol. El efecto antioxidante de las sustancias ensayadas dependió de la dosis. El periodo de inducción de la manteca de cerdo pura no se afectó por la cantidad de muestra presente en el sistema de reacción. PALABRAS-CLAVE: Aceite esencial -Antioxidante -Hierbas medicinales -Método de Rancimat -Oxidación de lípidos. SUMMARY Inhibition of lard oxidation by fractions of different essential oils.The ability to inhibit lard oxidation by the essential oils of Origanum vulgare L. spp. hirtum, Thymus vulgaris L., Thymus serpyllum L . , Satureja montana L. and Satureja cuneifolia Ten. was examined. Except Satureja cuneifoila Ten. essential oil, all the essential oils studied showed a strong phenolic profile characterized by the presence of phenolic monoterpenes -thymol and carvacrol. The Rancimat method has been applied on lard spiked with essential oils and their fractions. The ability of the essential oils tested and their fractions to act as inhibitors of the lipid oxidation process was lower in comparison with reference antioxidants (BHA and BHT), ascorbic acid and α-tocopherol).The antioxidant effect of the antioxidants tested was dose-dependent. Induction time of pure lard is not effected by the quantity of the oil sample in the reacting system.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Inhibition of lard oxidation by fractions of different essential oils

Kulišić¹,

Radonić²,

Miloš³

2005

Grasas y Aceites

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“…The antioxidant properties of aromatic plants and spices Antioxidant capacity and biological activity of essential oil and methanol extract of Hyptis crenata Pohl ex Benth have been indicated as effective in delaying the lipid peroxidation of foods (Bracco et al, 1981;Kramer, 1985;Lagouri et al, 1993;Souza et al, 2007). Tsimidou and Boskou (1994) observed that between the herbs and spices extensively studied, the plants belonging to the Lamiaceae family have significant antioxidant activity.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant capacity and biological activity of essential oil and methanol extract of Hyptis crenata Pohl ex Benth

Rebelo¹,

Silva²,

Andrade³

et al. 2009

Rev. bras. farmacogn.

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RESUMO: "Capacidade antioxidante e atividade biológica do óleo essencial e extrato metanólico de Hyptis crenata Pohl ex Benth". O óleo essencial das folhas e ramos finos frescos e secos de Hyptis crenata forneceu os seguintes rendimentos, 1,4% e 0,9%. Os constituintes voláteis principais foram a-pineno (22,0%; 19,5%), 1,8-cineol (17,6%; 23,2%), b-pineno (17,0%: 13,8%), cânfora (4,7%; 11,6%), limoneno (5,4%; 4,4%) e g-terpineno (3,5%; 2,4%), totalizando mais de 70% nos óleos. A atividade de seqüestro do radical DPPH para o extrato metanólico (CE 50 , 16,7 ± 0,4 mg/mL) foi comparável ao do BHT (19,8 ± 0,5 mg/mL) mostrando uma significante atividade antioxidante. Os óleos apresentaram baixa atividade. O teor de fenólicos totais (TP, 373,0 ± 15,9 mg GAE/g) e equivalente trolox (TEAC, 226,8 ± 0,5 mg TE/g) confirmaram a atividade antioxidante do extrato metanólico, que pode ser atribuída à presença de compostos fenólicos polares. No teste com larvas de camarão as concentrações letais para o óleo e extrato metanólico foram 6,7 ± 0,2 mg/mL e 13,0 ± 3,7 mg/mL, respectivamente, fornecendo importante evidência de suas atividade biológicas.Unitermos: Hyptis crenata, Lamiaceae, "salva-do-marajó", óleo essencial, atividade antioxidante, teor de fenólicos totais, citotoxidade. ABSTRACT:The essential oils of fresh and dried leaves and fine stems of Hyptis crenata furnished the following yields: 1.4% and 0.9%. The main volatile constituents were a-pinene (22.0%; 19.5%), 1,8-cineole (17.6%; 23.2%), b-pinene (17.0%; 13.8%), camphor (4.7%; 11.6%), limonene (5.4%; 4.4%) and g-terpinene (3.5%; 2.4%), totalizing more than 70% in the oils. The DPPH radical scavenging activity (EC 50 , 16.7 ± 0.4 mg/mL) of the methanol extract was comparable to BHT (19.8 ± 0.5 mg/mL) showing a significant antioxidant activity. The oils showed low activities. The amount of total phenolics (TP, 373.0 ± 15.9 mg GAE/g) and trolox equivalent (TEAC, 226.8 ± 0.5 mg TE/g) confirmed the antioxidant activity of the methanol extract that can be attributed to the presence of polar phenolic compounds. In the brine shrimp bioassay the lethal concentrations (LC 50 ) for the oil and methanol extract were 6.7 ± 0.2 mg/mL and 13.0 ± 3.7 mg/mL, respectively, providing important evidence of their biological activities.

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“…Oregano essential oils rich on thymol and carvacrol have shown considerable antioxidant activity on the process of food oxidation. 16,17 The data of DPPH inhibition, DPPH radical activity (EC 50 ), trolox equivalent antioxidant capacity (TEAC) and total phenolics (TP) for the plant oils (CsO-f and CsO-d) and methanol extract (CsE-d) of C. scoparioides are shown in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Antioxidant capacity and biological activity of essential oil and methanol extract of Conobea scoparioides (Cham. & Schltdl.) Benth.

Rebelo¹,

Silva²,

Andrade³

et al. 2009

J. Braz. Chem. Soc.

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Os óleos essenciais da planta sub-aquática Conobea scoparioides (fresca e previamente seca) apresentaram rendimentos de 3,4 e 3,3%, respectivamente. Os principais constituintes identificados foram o éter metílico do timol (39,6 e 47,7%), timol (40,0 e 26,4%), α-felandreno (12,1 e 14,3%) e p-cimeno (1,5 e 1,7%), totalizando mais de 90% nos referidos óleos. A concentração de seqüestro do radical DPPH (CE 50 ) dos óleos e extrato foi de 46,7 ± 3,6 µg mL -1 para a planta fresca (CsO-f), de 56,1 ± 2,4 µg mL -1 para a planta seca (CsO-d), e de 23,0 ± 2,2 µg mL -1 para o extrato metanólico (CsE-d). O valor do extrato é comparável ao BHT (19,8 ± 0,5 µg mL -1 ), usado como padrão antioxidante. O valor médio dos óleos é duas vezes menor, mas igualmente importante como agente antioxidante. O teor de Fenólicos Totais (TP, 124,6 ± 8,7 mg GAE per g) e o Trolox Equivalente (TEAC, 144,1 ± 4,9 mg TE per g) do extrato metanólico confirmaram a significativa atividade antioxidante de C. scoparioides. Da mesma forma, nos bioensaios com larva de camarão (Artemia salina) o valor médio da concentração letal dos óleos (CL 50 , 7,7 ± 0,3 µg mL -1 ) foi dez vezes maior que no extrato metanólico (CL 50 , 77,6 ± 7,1 µg mL -1 ) mostrando importante atividade biológica.The essential oils of the sub-aquatic plant Conobea scoparioides (fresh and dried previously) showed yields of 3.4 and 3.3%, respectively. The main identified constituents were thymol methyl ether (39.6 and 47.7%), thymol (40.0 and 26.4%), α-phellandrene (12.1 and 14.3%) and p-cymene (1.5 and 1.7%), totalizing more than 90% of the oils. The DPPH radical scavenging activity (EC 50 ) of the oils and extract was 46.7 ± 3.6 µg mL -1 in the fresh plant (CsO-f), 56.1 ± 2.4 µg mL -1 in the dried plant (CsO-d), and 23.0 ± 2.2 µg mL -1 in the methanol extract. The extract (CsE-d)value is comparable to BHT (19.8 ± 0.5 µg mL -1 ) used as antioxidant standard. The mean value of the oils is twice smaller but equally important as antioxidant agent. The mean amount of Total Phenolics (TP, 124.6 ± 8.7 mg GAE per g) and the Trolox Equivalent (TEAC, 144.1 ± 4.9 mg TE per g) of the methanol extract confirmed the significant antioxidant activity of C. scoparioides. Similarly, in the brine shrimp bioassay (Artemia salina) the mean value of the lethal concentration for the oils (LC 50 , 7.7 ± 0.3 µg mL -1 ) was ten times higher than the methanol extract (LC 50 , 77.6 ± 7.1 µg mL -1 ) showing important biological activity.Keywords: Conobea scoparioides, Scrophulariaceae, pataqueira, thymol and thymol methyl ether, antioxidant capacity, cytotoxicity IntroductionThe Scrophulariaceae is a cosmopolitan family comprising nearly 400 genera and 4,500 species, with their dispersion centre in the temperate regions of the north hemisphere. There are few species occurring in the Amazon. is a native erect herb called "pataqueira" or "vassourinhado-brejo", growing wild in seasonally inundated areas, with opposite leaves, sometimes alternate, deltoid, ovalate or lanceolate, with serrate or crenate margins. The who...

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Composition and antioxidant activity of essential oils from Oregano plants grown wild in Greece

Cited by 220 publications

References 14 publications

Inhibition of lard oxidation by fractions of different essential oils

Inhibition of lard oxidation by fractions of different essential oils

Antioxidant capacity and biological activity of essential oil and methanol extract of Hyptis crenata Pohl ex Benth

Antioxidant capacity and biological activity of essential oil and methanol extract of Conobea scoparioides (Cham. & Schltdl.) Benth.

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