Yield, composition, and antioxidant activity of avocado pulp oil extracted by pressurized fluids

Abaide, Ederson R.; Zabot, Giovani L.; Tres, Marcus V.; Martins, Rafael; Fagundez, Jean Lucca Souza; Nunes, Lucielle F.; Druzian, Susanne Pedroso; Soares, Juliana Ferreira; Prá, Valéria Dal; Silva, Juliana R.F.; Kuhn, Raquel C.; Mazutti, Márcio A.

doi:10.1016/j.fbp.2017.01.008

Cited by 49 publications

(24 citation statements)

References 43 publications

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“…The second phase (with a slower extraction rate) starts once the readily available oil is depleted and the oil from the deeper sections of the solid matrix begins to be extracted. At this stage the diffusion and the internal resistance of mass transfer dominate the extraction process . For supercritical CO 2 (Figure a), under the conditions of high oil yield (runs 1 and 2), it is possible to observe the two phases, but for the other conditions, most of the oil was removed during the phase with a fast extraction rate.…”

Section: Resultsmentioning

confidence: 90%

“…For the extractions with supercritical CO 2 , the application of high pressure (22 MPa) and low temperature (313 K) favoured higher yields ( p < 0.05). Increasing the pressure at a constant temperature increased the density of the supercritical fluid, hence the distance between molecules of the solvent and solute decreased, which increased the capacity of the solvent to solubilize the lipids, so higher oil yields were obtained. For instance, the oil yield from the macauba kernel decreased from 36.87 to 9.31 % when the density was decreased from 0.82 to 0.54 g/cm 3 (runs 1 and 3).…”

Section: Resultsmentioning

confidence: 97%

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Extraction of macauba kernel oil using supercritical carbon dioxide and compressed propane

et al. 2018

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Macauba kernel oil (MKO) was extracted using supercritical CO 2 and compressed propane as the solvent. The influence of temperature (313-353 K for CO 2 and 303-333 K for propane) and pressure (18-22 MPa for CO 2 and 8-12 MPa for propane) on oil yield was investigated, and the results were compared with conventional extraction. A characterization of oil and defatted meal was performed. Temperature and pressure, in the evaluated range, influenced oil yield with the use of CO 2 . For propane, the oil yield was not influenced by the experimental conditions. In the evaluated experimental range, the use of propane and CO 2 provided 100 % and $93 % oil yield compared to conventional extraction, respectively. MKO showed a predominance of saturated fatty acids, among which lauric acid was the major constituent. CO 2 presented greater efficiency in the removal of phytosteroids and tocopherols from the macauba kernel, however, the oil extracted with propane presented longer oxidative stability. Defatted meals presented modified physico-chemical composition and potentiated technological characteristics due to oil removal. Solvent density; ÃÃ average value of three replicate runs AE standard deviation. Means followed by the same letters indicates no significant difference (p > 0.05).

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 97%

Extraction of macauba kernel oil using supercritical carbon dioxide and compressed propane

et al. 2018

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“…Diffusivity, density, viscosity and solvation power of solvents, among others, are parameters that can be adjusted to conduct a suitable activation. Among the solvents, CO 2 , propane, n‐butane, and liquefied petroleum gas (LPG) are most widely used because they favor mass transport and enable working with mild temperatures …”

Section: Introductionmentioning

confidence: 99%

“…Among the solvents, CO 2 , propane, n-butane, and liquefied petroleum gas (LPG) are most widely used because they favor mass transport and enable working with mild temperatures. [7][8][9][10] Candida antarctica lipase B (CALB, EC 3.1.1.3) is one of the enzymes that can be activated in pressurized fluids. CALB is an excellent biocatalyst for many types of reactions, such as hydrolysis, esterification, and transesterification.…”

Section: Introductionmentioning

confidence: 99%

Activation of Candida antarctica lipase B in pressurized fluids for the synthesis of esters

Nyari

Zabot

Zamadei

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND The objective of this work was to evaluate the activation of Candida antarctica lipase B (CALB) in pressurized CO2 or liquefied petroleum gas (LPG) and, thereafter, to evaluate the synthesis of esters using activated CALB as a biocatalyst. Before activation, CALB was immobilized in polyurethane. For the esterification reactions, mechanical or ultrasonic agitations were studied. The stability of CALB after reuse cycles was also evaluated. RESULTS Before activation, the enzymatic activity of immobilized CALB was 789 U g‐1. After activation in pressurized CO2 and LPG, the activities increased to 2486 U g‐1 and 1413 U g‐1, respectively. Consequently, the residual activities of CALB after activation in pressurized CO2 and LPG were 315% and 179%, respectively. For the best condition of reaction under ultrasonic agitation, oleic acid conversion was 51.2% when using non‐activated CALB. Otherwise, oleic acid conversions were 66.5% and 77.1% when using CALB activated in LPG and CO2, respectively. This biocatalyst maintained more than 80% of its residual activity when reused for up to 13 cycles. CONCLUSION Activation of CALB in pressurized CO2 provided enzymatic activities 1.76 times higher than activation in pressurized LPG did. Immobilized CALB had good performance as a stable biocatalyst for esterification reactions under ultrasonic agitation. © 2017 Society of Chemical Industry

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“…The oil recovered by LPG-mediated method was found with a high concentration of palmitic, oleic, linoleic acids, lycopersene, and stigmasterol. In terms of antioxidant capacity, oil extracted by supercritical method was superior to compressed LPG-assisted oil sample [25]. The quality of avocado oil extracted by solvent extraction was compared with the oil extracted by SC and ultrasound-assisted aqueous extraction (UAAE) methods.…”

Section: Resultsmentioning

confidence: 99%

Influence of Extraction Process on Yield, Total Phenolic Content, and Antioxidant Properties of Avocado (Persea Americana Mill.) Oil and Stability Assessment

Chaiyasut

Kesika

Sirilun

et al. 2019

Asian J Pharm Clin Res

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Objective: The present study evaluated the impact of drying and storage conditions on the quality of the avocado oil. Methods: The fresh avocado was obtained from local farmers of Chiang Mai province, Thailand. The avocado pulp was collected and blended. The blended samples were dried at different temperatures (60, 80, and 100°C) and the oil was extracted by manual or mechanical pressing. The avocado oil samples were stored in clear and amber glass bottles at various temperatures (4, 30, and 40°C) for 3 months. The organoleptic, Folin–Ciocalteu colorimetric, 1,1-diphenyl-2-picrylhydrazyl and 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulfonic acid assay, and titration methods were used to measure the physical changes (color, odor, and precipitation), total phenolic content (TPC), antioxidant activity, and acid value (AV) and peroxide values (PVs) of the samples, respectively. Results: The manual squeezing and mechanical pressing methods yielded about 1.17 and 24.91% of avocado oil from fresh, undried avocado flesh, and the pH of both samples was 5. The AV of manually squeezed and mechanically pressed oil samples was 2.91 and 2.88 mg KOH/g of oil, respectively. The PV of manually squeezed and mechanically pressed oil samples was 7.96 and 8.03 milliequivalent of oxygen per Kg of oil, respectively. The quality of the avocado oil dried at 60°C was high compared to other samples regarding TPC and antioxidant capacity. The storage of oil samples for 3 months at various temperatures and in different containers has not affected the quality significantly, except at 40°C. Conclusion: The study proposed that the drying process at more than 80°C interferes with the quality of the avocado oil, and the storage conditions have a greater impact on the stability of the avocado oil. The storage at a low temperature in the absence of light may extend the shelf life of the avocado oil.

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Yield, composition, and antioxidant activity of avocado pulp oil extracted by pressurized fluids

Cited by 49 publications

References 43 publications

Extraction of macauba kernel oil using supercritical carbon dioxide and compressed propane

Extraction of macauba kernel oil using supercritical carbon dioxide and compressed propane

Activation of Candida antarctica lipase B in pressurized fluids for the synthesis of esters

Influence of Extraction Process on Yield, Total Phenolic Content, and Antioxidant Properties of Avocado (Persea Americana Mill.) Oil and Stability Assessment

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