Thermal stability and antioxidant activity of essential oils from aromatic plants farmed in Argentina

Olmedo, Rubén Horacio; Asensio, Claudia Mariana; Grosso, Nelson

doi:10.1016/j.indcrop.2015.02.005

Cited by 52 publications

(83 citation statements)

References 28 publications

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“…En general, los porcentajes obtenidos en términos de desinfección, inducción de callogénesis y obtención de plántulas se en- 4,7 ± 0,7c 6,0 ± 1,0d 5,1 ± 0,6d 2,9 ± 0,4d 1 Valor promedio de la medida con mayor longitud para cada explante. letras diferentes en una columna indican diferencia estadística significativa para un nivel de significancia del 5% …”

Section: Establecimiento Del Cultivo In Vitro De Plántulas Deunclassified

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ESTANDARIZACIÓN DE UN PROTOCOLO DE DESINFECCIÓN Y ESTABLECIMIENTO DE CULTIVO In vitro DEAloysia tryphilla

Pérez¹,

Jaramillo²,

Gómez³

et al. 2016

BSAA

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Section: Establecimiento Del Cultivo In Vitro De Plántulas Deunclassified

“…la capacidad que tienen estas plantas para producir gran variedad de sustancias con características especiales ha llamado la atención de industrias farmacológicas, cosméticas y alimenticias [1]. Hoy existe alta y creciente demanda de este tipo de metabolitos, creando un negocio multimillonario alrededor de su explotación.…”

Section: Introductionunclassified

ESTANDARIZACIÓN DE UN PROTOCOLO DE DESINFECCIÓN Y ESTABLECIMIENTO DE CULTIVO In vitro DEAloysia tryphilla

Pérez¹,

Jaramillo²,

Gómez³

et al. 2016

BSAA

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“…However, the challenge of using the essential oil for any applications is to maintain its chemical stability. The essential oil is unstable to oxygen (Carneiro et al 2013;Turek and Stintzing 2013), temperature (Olmedo et al 2015), light (Turek and Stintzing 2013), water content (Toledo Hijo et al 2015;Turek and Stintzing 2013), and pH (Juntachote and Berghofer 2005). Therefore, a system offering the essential oil protection against these deterioration factors is required to maintain its quality during storage.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Holy Basil Essential Oil in Gelatin: Effects of Palmitic Acid in Carboxymethyl Cellulose Emulsion Coating on Antioxidant and Antimicrobial Activities

Ngamakeue

Chitprasert

2016

Food Bioprocess Technol

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The challenge of using essential oils possessing antioxidant and antimicrobial properties in food industry is to maintain their chemical stability. This research examined the roles of emulsion coating in preventing the degradation of holy basil essential oils (HBEO) during storage. The uncoated HBEO-loaded gelatin microcapsules and those coated with 1, 2, and 3 % palmitic acid emulsified in carboxymethyl cellulose, denoted as UC, C-1P, C-2P, and C-3P, respectively, had HBEO contents of 76.35, 76.09, 68.96, and 59.39 % with the surface oils of 1.31, 0.65, 0.65, and 0.84 %, respectively. The increase in the palmitic acid concentrations caused a significant increase in the L * values (p < 0.05). After 90 days of storage at 30°C, the surface oils of UC, C-1P, C-2P, and C-3P significantly increased to 3.65, 2.43, 2.15, and 3.03 %, respectively, coincident with the decrease in the L * values. Xray diffraction studies revealed that the crystalline structures of the microcapsules were influenced by gelatin renaturation and palmitic acid polymorphism. The antioxidant activities, expressed as IC 50 , of the free and encapsulated HBEO before storage were 0.30 mg/ml. After storage, IC 50 of only C-2P remained constant, while those of the rest significantly increased (p < 0.05). The minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of all the samples against pathogenic bacteria did not change over storage. C-3P exhibited the strongest antimicrobial activity of MIC of 0.625 mg/ml and MBC of 1.25 mg/ml. These findings suggest that the emulsion coating enables shelf life extension of HBEO-loaded gelatin microcapsules.

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“…The effects of mild heat (60-70°C) on the volatile composition of essential oil was reported by Matan et al (2013) and Olmedo et al (2015). Results showed an increase of some main components after thermal study.…”

Section: Optimization Of Absorbent Materials On the Growth Of Aflavusmentioning

confidence: 92%

“…Results showed an increase of some main components after thermal study. For example, carvacrol increased from 20.4 to 26.4 % and cymene increased from 1.94 to 13.13 % during a thermal stability study (Olmedo et al 2015). In 2013, Matan et al reported that using lime oil at 90 μl ml −1 with heat curing at 70°C showed the best enhanced antifungal activity of lime oil against A. niger in both the medium and on the sedge.…”

Section: Optimization Of Absorbent Materials On the Growth Of Aflavusmentioning

confidence: 99%

Effect of UV-C radiation and vapor released from a water hyacinth root absorbent containing bergamot oil to control mold on storage of brown rice

Songsamoe

Matan

2016

J Food Sci Technol

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The aims of this study were to develop absorbent material from a water hyacinth root containing bergamot oil and to improve its antifungal activity by using ultraviolet C (UV-C) against the growth of A. flavus on the brown rice. Process optimization was studied by the immersion of a water hyacinth root into a water and bergamot oil (300, 500 and 700 μl ml −1 ). The root (absorbent material) was dried at 50, 70, and 90°C for 10 min. Then, ultraviolet C (UV-C) was used for enhancing the antifungal activity of bergamot oil for 10, 15, and 20 min. The shelf-life of the brown rice with the absorbent after incubation at 25°C with 100 % RH for 12 weeks was also investigated. A microscope and a Fourier transform infrared spectroscopy (FTIR) were used to find out possible mode of action. Results indicated that the absorbent material produced from the water hyacinth root containing bergamot oil at 500 μl ml −1 in the water solution, dried at 70°C and UV for 15 min showed the highest antifungal activity in a vapor phase against A. flavus on the brown rice. A microscopy investigation confirmed that the water hyacinth root could absorb bergamot oil from an outside water solution into root cells. Limonene in vapor phase was shown to be a stronger inhibitor than essential oil after UV-C radiation and should be the key factor in boosting bergamot oil antifungal activity. A vapor phase of bergamot oil could be released and inhibit natural mold on the surface of the brown rice for up to 12 weeks; without the absorbent, mold covered the brown rice in only 4 weeks.

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Thermal stability and antioxidant activity of essential oils from aromatic plants farmed in Argentina

Cited by 52 publications

References 28 publications

ESTANDARIZACIÓN DE UN PROTOCOLO DE DESINFECCIÓN Y ESTABLECIMIENTO DE CULTIVO In vitro DEAloysia tryphilla

ESTANDARIZACIÓN DE UN PROTOCOLO DE DESINFECCIÓN Y ESTABLECIMIENTO DE CULTIVO In vitro DEAloysia tryphilla

Encapsulation of Holy Basil Essential Oil in Gelatin: Effects of Palmitic Acid in Carboxymethyl Cellulose Emulsion Coating on Antioxidant and Antimicrobial Activities

Effect of UV-C radiation and vapor released from a water hyacinth root absorbent containing bergamot oil to control mold on storage of brown rice

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