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DYNA

versão impressa ISSN 0012-7353

Dyna rev.fac.nac.minas vol.86 no.209 Medellín abr./jun. 2019

http://dx.doi.org/10.15446/dyna.v85n207.74840 

Artículos

Extraction of total carotenoids from peach palm fruit (Bactris gasipaes) peel by means of ultrasound application and vegetable oil

Extracción de carotenoides totales a partir de epicarpio de chontaduro (Bactris gasipaes) mediante aplicación de ultrasonido y aceite vegetal

Luis Eduardo Ordoñez-Santos a   , Jader Martínez-Girón b   , Diana Ximena Rodríguez-Rodríguez a  

a Facultad de Ingeniería y Administración, Departamento de Ingeniería, Universidad Nacional de Colombia-Sede Palmira, Colombia. leordonezs@unal.edu.co, dxrodriguezr@unal.edu.co

b Facultad de Ingeniería, Universidad del Valle-Sede Palmira, Colombia. jader.martinez@correounivalle.edu.co

Abstract

Ultrasound-assisted extraction (UAE) technology was applied to extract total carotenoids from the dry peach palm peel using soybean oil as extraction solvent. The optimization of the parameters of total extraction of carotenoids from the dried peel was carried out using the Response Surface Methodology (RSM) and the Central Composite Design (CCD). The extraction parameters were temperature, extraction time and solid-solvent ratio. The optimal conditions for UAA-assisted extraction were: 48 ° C, extraction time of 28 min, and solid-solvent ratio of 0.0037 g / mL, with a predicted carotenoid content of 151.50 mg / 100 g of dry peel. To validate the optimized model, the experimental values were compared with the predicted values to verify the adequacy and fit of the model. The ultrasound extraction was 33.60% higher than the maceration technique, reason why this study indicated that the UAE represents an ecological contribution in the valorization of byproducts coming from peach palm fruits.

Key words: β-carotene; cavitation; central composite design; optimization

Resumen

Se aplicó la tecnología de extracción asistida por ultrasonido (EAU) para extraer los carotenoides totales procedentes del epicarpio seco de frutos de chontaduro utilizando aceite de soya como solvente de extracción. La optimización de los parámetros de extracción total de carotenoides a partir del epicarpio de chontaduro se realizó mediante la metodología de superficie de respuesta (RSM) y el diseño central compuesto (CCD). Los parámetros de extracción fueron la temperatura, el tiempo de extracción y la relación sólido-solvente. Las condiciones óptimas de la extracción asistida por EAU fueron: 48 ° C, tiempo de extracción de 28 min, y relación de sólido-solvente de 0.0037 g/mL, con un contenido de carotenoides predicho de 151.50 mg/100 g de epicarpio seco. Para validar el modelo optimizado, los valores experimentales se compararon con los valores predichos para verificar la adecuación y el ajuste del modelo. La extracción mediante ultrasonido fue 33.60% más alta que la técnica de maceración, razón por la cual este estudio indicó que la EAU representa una contribución ecológica en la valorización de subproductos procedentes de frutos de chontaduro.

Palabras-clave: β-caroteno; cavitación; diseño central compuesto; optimización

1. Introduction

Peach palm (Bactris gasipaes) is a fruit consumed since pre-Colombian time in tropical areas ranging from the Amazon to Costa Rica, cooked fruits are eaten, or products such as flour, preserves, jams, chips and fermented beverages are produced [1,2]. Yuyama et al. [3] reported that the peach palm is one of the more complete tropical foods due to its nutritional value because it has high contents of protein, essential amino acids and unsaturated fatty acids. Notably, this fruit has high contents of β-carotene, vitamin A, calcium, phosphorus and iron [1]. Carotenoids are molecules obtained in photosynthetic tissues, and chemically known as hydrocarbon carotenes (lycopene and β-carotene) or xanthophylls (lutein, β-cryptoxanthin, and zeaxanthin) [4]. These compounds are important in the human diet because they are associated with protection against cancer and some degenerative diseases (e.g., cataracts, age-related macular degeneration and Alzheimer's Disease), as reported antioxidants and pro-vitamin properties [5]. The extraction of carotenoids of plant tissues conventionally is performed by solid-liquid extraction (maceration and Soxhlet), which are laborious, time consuming and require high volumes of organic solvents (acetone, hexane, acetonitrile, tetrahydrofuran, and petroleum ether) [6,7]. Situation has led to study new non-conventional methods that can reduce the extraction time, the process temperature and solvent consumption and contribute to higher extraction efficiency and lower energy consumption compared to conventional extraction methods [8]. Currently, extraction techniques such as ultrasound, offer greater efficiency in the extraction of bioactive compounds, because this technique is very simple and economical, making it an alternative to the conventional techniques [9]. The high efficiency of ultrasound extraction is mainly attributed to its mechanical effects, cavitation increases the temperature and pressure facilitating the phenomena of mass transfer by increasing the solubility and diffusivity of the solvent in the extraction matrix, as has previously reported by Chandrapala et al. [10] and Junjian et al. [11]. The ultrasound technique has been used in the extraction of carotenoids in plant materials, such as tomato [12,13], citrus peels [14], oil palm [15], carrot [16,17], red grapefruit [18], annatto seeds [19], papaya waste [20], peach palm peel [21], and pomegranate wastes [22]. Despite these works, studies are still limited, where vegetable oils are used as solvent in the green extraction of carotenoids by ultrasound. This paper aims to study the effect of various parameters such as extraction time, solid to solvent ratio, and extraction temperature which affects ultrasonic-assisted extraction (UAE). Hence, the main aim of this work is to optimize the various above-mentioned parameters for the extraction of carotenoids from dry peach palm peel using soy oil as extraction solvent.

2. Materials and methods

2.1. Materials chemicals and materials

The high quality β-carotene standard (95-99%) was provided by Sigma Aldrich. At a local supermarket was purchased refined soy oil. The absorption spectrum of the extracts was measured in a spectrophotometer (Jenway 6320D spectrophotometer, USA.). The refined soy oil had a peroxide index of 0.94 Meq O2/kg and an acidity percentage (oleic) of 0.28%.

2.2. Obtaining ß-carotene extract ultrasonic-assisted extraction total carotenoid from dried peel

Dried peel preparation and the extraction were conducted as the report Ordóñez-Santos et al. [21]. Peach palm fruit (Bactris gasipaes) peel was separated with a knife, peel was oven dried at 60 °C until the moisture level was constant (11 % w/w), and reduced to particle size of 0.25 mm. Dry peel dispersed in 4 mL of soy oil, and the extraction was performed at different temperature, extraction time and solid to solvent ratio. UAE was performed in an ultrasonic bath system (Ultrasonic Cleaner mrc DC 150 H, with 40 kHz frequency and maximum power of 150 W, the internal dimension: (300 mm × 155 mm × 150 mm). The carotenoid yield (mg/100 g dried peel) was calculated using the molar extinction coefficient of 10.6*104 M-1cm-1 for β-carotene in soy oil at 464 nm, according to Ordóñez-Santos et al. [21]. Ultrasound assisted extraction was compared with the Soxhlet and maceration, conventional extraction methods. Soxhlet extraction was performed following described by Zaghdoudi et al. [23], modifying the methanol by hexane as solvent extractor for 6 hours, the solvent evaporated using nitrogen. Extraction by maceration proposed by Li et al. (2013) modifying the sunflower oil by soy oil as solvent extractor for 6 hours. The actual power dissipated in the ultrasonic bath was 75-90 W, which was determined by calorimetric method reported by Kiani et al. [24].

2.3. Experimental design

Optimization of UAE parameters of total carotenoid extraction from dry peel was done using Response Surface Methodology (RSM). A five-level-three-factor, central composite rotatable design consisting of seventeen experimental runs was employed including three replicates at the center point. The extraction factors were temperature (X1, °C), extraction time (X2, min) and solid to solvent ratio (X3, g/mL).

The actual and coded levels of the independent variables are given in (Table 1), and second-order polynomial equation which includes all interaction terms was used to calculate the predicted response in the following eq. (1).

Table 1 Independent variables and their levels used for in a Central Composite Rotatable design. 

Source: The Authors.

where Y is the response variable, ß0, ßi, ßii, and ßij values represent corresponding regression coefficients, and Xi and Xj are independent variables (i ≠ j). The analysis of variance (ANOVA), the mean values were considered significantly different when p < 0.05, regression analysis and plotting of response surface plots, allowed establishing the optimal conditions for total carotenoids. Statistical analysis was performed by using Design Expert program (10.0. version).

3. Results and discussion

3.1. Response surface optimization

The effect of the factors evaluated in ultrasonic of total carotenoids extraction can be seen in Table 2. The range of total carotenoids extracted peach palm peel, experimental values between 44.20- 166.43 mg/100 g dried peel. Table 3 shows the statistical analysis of the response surface, linear, quadratic, and interaction effect of the three study factors (extraction temperature, extraction time, and solid to solvent ratio). The significance level model (p <0.01) shows that this can be applied to monitor the optimization of the extraction process. Temperature, extraction time, solid to solvent ratio, and the quadratic effect of factors statistically influenced of total carotenoids extraction (Table 3). As shown in the Table 3, Lack of Fit was not significant (p> 0.05) in the mathematical model proposed; this ensures suitability to predict the variations within the system. The experimental values showed a good fit with the empirical regression equation Y= 159.09 - 25.33X1 - 12.98X2 + 19.40X3 + 10.32 X1X2 - 12.63X1X3 + 2.27X2X3 - 27.27X2 1 - 21.89X2 2 -24.36 X2 3, as they presented the value of the coefficient determination r2 was 0.9466 and r2 adj = 0.8780 (Table 3).

Table 2 Central composite rotatable design matrix and response values for total carotenoids 

Source: The Authors.

Table 3 Analysis of variance (ANOVA) for the fitted quadratic polynomial model for optimization of extraction parameters 

r2=0.9466. r2 Adj=0.8780, a*(p < 0.05); **(p < 0.01) and ***( p < 0.001), and NS= Not significant.

Source: The Authors.

Source: The Authors.

Figure 1 3-D response surface of extraction temperature and extraction time on the content of total carotenoids. 

Source: The Authors.

Figure 2 3-D response surface of solid to solvent ratio and extraction time on the content of total carotenoids.  

3.2. Response surface and contour plots

Fig. 1, the response surface generated by the effect of extraction time and temperature on the extraction of total carotenoid concentration is presented. It is noted, that increasing the temperature significantly reduces total carotenoids concentration and a quadratic temperature effect is evident. Guadarrama-Lezama et al. [25] report that the temperature is a factor which can accelerate the process of oxidation polyunsaturated fatty acids present in oil, which in turn, have co-oxidation reactions in carotenoids. Moreover, temperatures below increase the extraction of carotenoids; this probably associated to the reduction of viscosity and increased solubility of the pigment which allowed improved mass transfer, this situation has been previously described by Yolmeh et al. [19].

Source: The Authors.

Figure 3 3-D response surface of extraction temperature and solid to solvent ratio on the content of total carotenoids. 

Fig. 2, a significant effect in solid to solvent ratio to total carotenoids extraction is observed, carotenoid concentrations increased with increasing solute in the solvent and quadratic effect was observed in this factor. These results indicate that despite the increase of the solute, the solvent proportion remained higher, creating a concentration gradient, responsible for mass transfer, which allowed the diffusion of total carotenoids in the medium [18, 26]. This phenomenon has been previously observed by Sun et al. [14] and Purohit & Gogate [27] in the extraction β-carotene in carrots and orange by-product, in initial stages of extraction with ultrasound. Fig. 3 confirms the effect of the temperature and solid to solvent ratio of the level of total carotenoids extraction. The incidence of the quadratic effect of temperature and solid to solvent ratio is also observed (Figs. 2, 3).

The optimum extraction of total carotenoids peel peach palm with soy oil according to the analysis of response surface corresponded to a time of 28 minutes, temperature of 48 °C and solid to solvent ratio 0.0037 g/mL, allowed to obtain a maximum concentration of 151.50 mg/100 g dried peel. The values of optimization extraction were validated experimentally obtaining total carotenoids concentration of 149.35 ± 3.86 mg/100 g dried peel, which showed no significant difference (p> 0.05) with the value recorded in the optimization. Moreover, ultrasound extraction was compared with soxhlet and maceration techniques, considered conventional methods of extraction of carotenoids. Total carotenoid extraction (mg/100 g dried peel) by soxhlet was 168.8 ± 3.50; ultrasound was 151.50 ± 1.36, and maceration 113.40 ± 1.20. The extraction with soxhlet presented the greater extraction, however, these results show that the ultrasound technique by using vegetable oil is effective for extraction of total carotenoids in the by-product peach palm procedure since operation time was 28 minutes, no toxic reagents were used to the environment and water consumption is minimal in this technique, compared to extraction with soxhlet which requires excessive consumption of water in the cooling system, time continuous extraction of 6 hours, with high volumes of hexane or petroleum ether as solvent extractor. Moreover, maceration with soy oil is a technique that does not affect the environment, but the operating time and extraction yield is slow. Similar results reported Li et al. [16] who obtain higher concentrations of total carotenoids with ultrasound 334.75 mg β-carotene/L, compared to extraction by maceration 321.36 β-carotene mg/L in samples of carrot. Ordóñez-Santos et al. [21] report that by-product peach palm under the action of ultrasound, had higher levels of total carotenoids (163.47 mg β-carotene/100 g), compared to those who were not exposed to the ultrasound action (123.40 mg β-carotene/100 g). Li et al. [20] obtain higher level of extraction of lycopene in the skin of papaya samples with ultrasound (189.80 µg/g) against maceration (153.90 µg/g) and soxhlet (68.30 µg/g). Shisath et al. [28] and Tian et al. [29] report that the extraction yields obtained by ultrasound, is associated with the cavitation phenomenon caused by the propagation of pressure waves in the solvent. These authors report that the collapse of cavitation bubbles produced by micro-turbulence generates high-velocity inter-particle collisions and perturbation in micro-porous particles of the biomass which accelerates the eddy diffusion and internal diffusion. Shisath et al. [28] reports that due to cavitation, the cracks are developed in the cell wall which increases permeability of plant tissues facilitating the entry of the solvent into the inner part of the material as well as washing out of the extracts.

4. Conclusions

In this work the extraction variables, temperature and solid to solvent ratio statistically influenced the UAE of total carotenoids extraction from peach palm fruit peel. The extraction process that was optimized in the present research for obtain the highest extraction of carotenoids corresponded: 48 °C of temperature, 28 min of extraction time and of solid to solvent ratio of 0.0037 g/mL. This study indicated that the combination of ultrasound and soy oil can be considered as an alternative extraction of carotenoids to conventional methods, and should contribute to a green process for valorization of peach palm by-products.

Acknowledgments

The National Research of Seed Program Creation and Innovation National University of Colombia, for the financing of this study.

References

[1] Rojas-Garbanzo, C., Pérez, A.M., Bustos-Carmona, J. and Vaillant, F., Identification and quantification of carotenoids by HPLC-DAD during the process of peach palm (Bactris gasipaes H.B.K.) flour. Food Res. Int, 44(7), pp. 2377-2384, 2011. DOI: 10.1016/j.foodres.2011.02.045 [ Links ]

[2] Graefe, S., Dufour, D., Van Zonneveld, M., Rodriguez, F. and Gonzalez, A., Peach palm (Bactris gasipaes) in tropical Latin America: implications for biodiversity conservation, natural resource management and human nutrition. Biodivers. Conserv, 22(2), pp. 269-300, 2013. DOI: 10.1007/s10531-012-0402-3 [ Links ]

[3] Yuyama O ., Aguilar, J.P. , Yuyama, K. , Clement , R. , Macedo S ., and Fávaro, D.I ,., Chemical composition of fruit mesocarp of three peach palm. Int. J Food Sci. Nutr, 54(1), pp. 49-56, 2003. DOI: 10.1080/096374803/000061994 [ Links ]

[4] Bramley, P.M., Regulation of carotenoid formation during tomato fruit ripening and development. J. Exp. Bot, 53(377), pp. 2107-2113, 2002. DOI: 10.1093/jxb/erf059 [ Links ]

[5] Amorim-Carrilho, K.T., Cepeda, A., Fente, C. and Regal, P., Review of methods for analysis of carotenoids. Trends Analyt. Chem, 56, pp. 49-73, 2014. DOI: 10.1016/j.trac.2013.12.011 [ Links ]

[6] Esclapez, M.D., García-Pérez, J.V., Mulet, A. and Cárcel, J.A., Ultrasound-assisted extraction of natural products. Food Eng. Rev, 3(2), pp. 108-120, 2011. DOI: 10.1007/s12393-011-9036-6 [ Links ]

[7] Tiwari, B.K., Ultrasound: a clean, green extraction technology. Trends Analyt. Chem, 71, pp. 100-109, 2015. DOI: 10.1016/j.trac.2015.04.013 [ Links ]

[8] Parniakov, O., Barba, F.J., Grimi, N., Lebovka, N. and Vorobiev, E., Impact of pulsed electric fields and high voltage electrical discharges on extraction of high-added value compounds from papaya peels. Food Res. Int, 65, pp. 337-343, 2014. DOI: 10.1016/j.foodres.2014.09.015 [ Links ]

[9] Dey, S. and Rathod, V.K., Ultrasound assisted extraction of β-carotene from Spirulina platensis. Ultrason. Sonochem, 20(1), pp. 271-276, 2013. DOI: 10.1016/j.ultsonch.2012.05.010 [ Links ]

[10] Chandrapala, J., Oliver, C.M., Kentish, S. and Ashokkumar, M., Use of power ultrasound to improve extraction and modify phase transitions in food processing. Food Rev. Int, 29(1), pp. 67-91, 2013. DOI: 10.1080/87559129.2012.692140 [ Links ]

[11] Junjian, R., Mingtao, F., Yahui, L., Guowei, L., Zhengyang, Z. and Jun, L., Optimisation of ultrasonic-assisted extraction of polyphenols from apple peel employing cellulase enzymolysis. Int. J. Food Sci. Technol, 48(5), pp. 910-917, 2013. DOI: 10.1111/ijfs.12041 [ Links ]

[12] Lianfu, Z. and Zelong, L., Optimization and comparison of ultrasound/microwave assisted extraction (UMAE) and ultrasonic assisted extraction (UAE) of lycopene from tomatoes. Ultrason Sonochem, 15(5), pp. 731-737, 2008. DOI: 10.1016/j.ultsonch.2007.12.001 [ Links ]

[13] Eh, A. and Teoh, S.G., Novel modified ultrasonication technique for the extraction of lycopene from tomatoes. Ultrason. Sonochem, 19(1), pp. 151-159, 2012. DOI: 10.1016/j.ultsonch.2011.05.019 [ Links ]

[14] Sun, Y., Liu, D., Chen, J., Ye, X. and Yu, D., Effects of different factors of ultrasound treatment on the extraction yield of the all-trans-b-carotene from citrus peels. Ultrason. Sonochem, 18(1), pp. 243-249, 2011. DOI: 10.1016/j.ultsonch.2010.05.014 [ Links ]

[15] Ofori-Boateng, C. and Lee, K.T., Response surface optimization of ultrasonic-assisted extraction of carotenoids from oil palm (Elaeis guineensis Jacq.) fronds. Food Sci Nutr, 1(3), pp. 209-221, 2013.DOI: 10.1002/fsn3.22 [ Links ]

[16] Li, Y., Fabiano-Tixier, A.S., Tomao, V., Cravotto, G. and Chemat, F., Green ultrasound-assisted extraction of carotenoids based on the bio-refinery concept using sunflower oil as an alternative solvent. Ultrason. Sonochem, 20(1), pp. 12-18, 2013. DOI: 10.1016/j.ultsonch.2012.07.005 [ Links ]

[17] Nowacka, M. and Wedzik, M., Effect of ultrasound treatment on microstructure, colour and carotenoid content in fresh and dried carrot tissue. Appl. Acoust, 103, pp. 163-171, 2016. DOI: 10.1016/j.apacoust.2015.06.011 [ Links ]

[18] Xu, Y. and Pan, S., Effects of various factors of ultrasonic treatment on the extraction yield of all-trans-lycopene from red grapefruit (Citrus paradise Macf.). Ultrason. Sonochem, 20(4), pp. 1026-1032, 2013. DOI: 10.1016/j.ultsonch.2013.01.006 [ Links ]

[19] Yolmeh, M., Habibi-Najafi, M.B. and Farhoosh, R., Optimisation of ultrasound-assisted extraction of natural pigment from annatto seeds by response surface methodology (RSM). Food Chem, 155, pp. 319-324, 2014. DOI: 10.1016/j.foodchem.2014.01.059 [ Links ]

[20] Li, A.N., Li, S., Xu, D.P., Xu, X.R., Chen, Y.M., Ling, W.H., Chen, F. and Li, H.B., Optimization of ultrasound-assisted extraction of lycopene from papaya processing waste by response surface methodology. Food Anal. Methods, 8(5), pp. 1207-1214, 2015. DOI: 10.1007/s12161-014-9955-y [ Links ]

[21] Ordóñez-Santos, L.E., Pinzón-Zarate, L.X. and González-Salcedo, L.O., Optimization of ultrasonic-assisted extraction of total carotenoids from peach palm fruit (Bactris gasipaes) by-products with sunflower oil using response surface methodology. Ultrason Sonochem, 27, pp. 560-566, 2015. DOI: 10.1016/j.ultsonch.2015.04.010 [ Links ]

[22] Goula, A.M., Ververi, M., Adamopoulou, A. and Kaderides, K., Green ultrasound-assisted extraction of carotenoids from pomegranate wastes using vegetable oils. Ultrason. Sonochem, 34, pp. 821-830, 2017.DOI: 10.1016/j.ultsonch.2016.07.022 [ Links ]

[23] Zaghdoudi, K., Pontvianne, S., Framboisier, X., Achard, M., Kudaibergenova, R., Ayadi-Trabelsi, M., Kalthoum-Cherif, J., Vanderesse, R., Frochot, C. and Guiavarc’h, Y., Accelerated solvent extraction of carotenoids from: Tunisian Kaki (Diospyros kaki L.), peach (Prunus persica L.) and apricot (Prunus armeniaca L.). Food Chem, 184, pp. 131-139, 2015. DOI: 10.1016/j.foodchem.2015.03.072 [ Links ]

[24] Kiani, H., Sun, D.W. and Zhang, Z., The effect of ultrasound irradiation on the convective heat transfer rate during immersion cooling of a stationary sphere. Ultrason. Sonochem, 19(6), pp. 1238-1245, 2012. DOI: 10.1016/j.ultsonch.2012.04.009 [ Links ]

[25] Guadarrama-Lezama, A.Y., Dorantes-Alvarez, L., Jaramillo-Flores, M.E., Pérez-Alonso, C., Niranjan, K., Gutiérrez-López, G.F. and Alamilla-Beltrán, L., Preparation and characterization of non-aqueous extracts from chilli (Capsicum annuum L.) and their microencapsulates obtained by spray-drying. J. Food Eng, 112(1-2), pp. 29-37, 2012. DOI: 10.1016/j.jfoodeng.2012.03.032 [ Links ]

[26] Tao, Y. and Sun, D.W., Enhancement of food processes by ultrasound: A review. Crit. Rev. Food Sci. Nutr, 55, pp. 570-594, 2015. DOI: 10.1080/10408398.2012.667849 [ Links ]

[27] Purohit, A.J. and Gogate, P.R., Ultrasound-assisted extraction of β-carotene from waste carrot residue: effect of operating parameters and type of ultrasonic irradiation. Separ. Sci. Technol, 50(10), pp. 1507-1517, 2015. DOI: 10.1080/01496395.2014.978472 [ Links ]

[28] Shirsath, S.R., Sonawane, S.H. and Gogate, P.R., Intensification of extraction of natural products using ultrasonic irradiations-A review of current status. Chem. Eng. Process: Process Intensification, 53, pp. 10-23, 2012. DOI: 10.1016/j.cep.2012.01.003 [ Links ]

[29] Tian, Y., Xu, Z., Zheng, B. and Martin-Lo, Y., Optimization of ultrasonic-assisted extraction of pomegranate (Punica granatum L.) seed oil. Ultrason. Sonochemi, 20(1), pp. 202-208, 2013. DOI: 10.1016/j.ultsonch.2012.07.010 [ Links ]

How to cite: Ordoñez-Santos L.E., Martínez-Girón, Rodríguez-Rodríguez, D.X., Extraction of total carotenoids from peach palm fruit (Bactris gasipaes) peel by means of ultrasound application and Ordoñez-Santos vegetable oil. DYNA, 86(209), pp. 91-96, April - June, 2019.

Conflict of interest The authors declare that there are no conflicts of interest.

L.E. Ordoñez-Santos, is an associate professor of the Universidad Nacional de Colombia, Sede Palmira. Is BSc. in Agroindustrial Engineer, PhD in Food Science and Technology. Leader of the Research Group on Agroindustrial Processes (GIPA). More than forty publications in national and international journals on fruit and vegetable processing, ultrasound processing, food color evaluation, extraction and quantification of bioactive compounds such as carotenoids, anthocyanins, phenolic compounds, vitamin C, among others. ORCID: 0000-0002-8958-027X.

J. Martínez-Girón, is a BSc. in Chemistry and Food Technology. MSc. in Agroindustrial Engineering, MSc. in Education, has worked as a quality analyst in Fleischmann Food and Ingenio Manuelita S.A. Coordinator and professor of the academic program of food technology in Universidad del Valle-Sede Palmira, occasional professor at the Universidad Nacional de Colombia-Sede Palmira. His research interests include: color of food, use of fruit waste as a source of bioactive compounds such as carotenoids and chlorophyll, edible oils, cereals and bakery. ORCID: 0000-0003-4191-5445.

D.X. Rodríguez-Rodríguez, is a BSc. in Agroindustrial Engineer, integrant of the Research Group on Agroindustrial Processes (GIPA). Research interests include: ultrasound processing, food color evaluation. ORCID: 0000-0002-8373-0863

Recebido: 11 de Setembro de 2018; Revisado: 01 de Março de 2019; Aceito: 14 de Março de 2019

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