Comparison of Different Latex Fractions of Carica Papaya L., and Novozyme 435® in the Methanolysis of Canola Oil

The activity of crude (P3) and protease-free (CPL-p) fractions of latex from Carica papaya in the lipolysis and methanolysis of canola oil were investigated. P3 and CPL-p fractions were extracted from C. papaya fruits collected in the department of Atlántico (Colombia), obtaining extraction yields o...

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Bibliographic Details
Published in:Revista de Ciencias
Main Authors: Ortega Afanador, Viviana, Fontalvo Gómez, Miriam, Mendoza Meza, Dary
Format: Article in Journal/Newspaper
Language:Spanish
Published: Universidad del Valle 2018
Subjects:
P3
Online Access:https://revistas.univalle.edu.co/index.php/revista_de_ciencias/article/view/7102
https://doi.org/10.25100/rc.v22i1.7102
Description
Summary:The activity of crude (P3) and protease-free (CPL-p) fractions of latex from Carica papaya in the lipolysis and methanolysis of canola oil were investigated. P3 and CPL-p fractions were extracted from C. papaya fruits collected in the department of Atlántico (Colombia), obtaining extraction yields of 26.89 ± 0.26 and 4.85 ± 0.04 g/100 g of fresh latex, respectively. The lipase activity of the CPL-p, determined by titration of the fatty acids was 58.4% greater than P3. Both fractions were evaluated as catalysts in the production of fatty acid methyl esters (FAME). The lipase B from Candida antarctica (Novozyme 435®) was used as a reference catalyst. All reactions were carried out in a batch-type bioreactor for 48 h, at 200 rpm and 50 ºC. The conditions of reaction with P3 and CPL-p were: 6 g oil, 20 %w/w n-hexane, 15 %w/w catalyst, methanol/oil molar ratio of 3:1. The conversions obtained were: P3 = 31.55 ± 1.01 %, CPL-p = 38.48 ± 0.76 % and Novozyme 435 = 62.96 ± 0.63 %. These results demonstrate the potential of CPL-p for the hydrolysis of vegetable oils used in the food industry. However, under the experimental conditions used in the present study, its application in the production of FAME is limited. It is concluded that the latex of the papaya´s fruit, from the trees that are grown in the Colombian Caribbean region, is an agroindustrial by-product with a high potential in lipid bioconversion. Se investigó la actividad de las fracciones crudas (P3) y libres de proteasas (CPL-p) del látex de Carica papaya en la lipólisis y metanólisis del aceite de canola. Las fracciones P3 y CPL-p fueron extraídas de frutos de C. papaya colectados en el departamento del Atlántico (Colombia), obteniéndose rendimientos de extracción del 26,89±0,26 y 4,85±0,04 g/100 g de látex fresco, respectivamente. La actividad lipasa de CPL-p, determinada mediante titulación de ácidos grasos fue 58,4% mayor con respecto a P3. Ambas fracciones fueron evaluadas como catalizadores en la producción de ésteres metílicos de ácidos grasos (EMAG. Como catalizador de referencia se usó la lipasa B de Candida antarctica (Novozyme 435®). Las reacciones se llevaron a cabo en un bioreactor tipo batch durante 48 h, a 200 rpm y 50 ºC. Las condiciones de reacción con P3 y CPL-p fueron: 6g de aceite, 20 %p/p de n-hexano, 15 %p/p del catalizador y relación molar metanol/aceite de 3:1. Los porcentajes de conversión obtendios fueron: P3 = 31,55±1,01 %, CPL-p = 38,48±0,76 % y Novozyme-435 = 62,96±0,63 %. Estos resultados demuestran el potencial de CPL-p en la hidrólisis de aceites de interés en la industria de los alimentos. Sin embargo, bajo las condiciones experimentales usadas en el presente estudio, su aplicación en la producción de EMAG fue limitada. Se concluye que el látex del fruto de C. papaya, de los árboles que se cultivan en la región del Caribe colombiano, es un subproducto agroindustrial con un alto potencial en la bioconversión de lípidos.