Araujo, R.; Fernandes, C.; Ribeiro, D.; Efraim, P.; Steinmacher, D.; Lieberei, R.; Bastide, P.; Araujo, T. 2014. Cocoa Quality Index A proposal. Food Control 46: 49 – 54.
Bortolini, C.; Patrone, V.; Puglisi, E.; Morelli, L. 2016. Detailed analyses of the bacterial populations in processed cocoa beans of different geographic origin, subject to varied fermentation conditions. International Journal of Food Microbiology 236: 98–106.
Brunetto, M. Del R.; Gutiérrez, L.; Gallignani, M.; Zam-brano, A.; Gómez, Á.; Romero, C. 2007. Determina-tion of theobromine, theophylline and caffeine in cocoa samples by a high-performance liquid chromate-graphic method with on-line sample cleanup in a switching-column system. Food Chemistry 100: 459–467.
Camu, N.; De Winter, T.; Addo, S.K.; Takrama, J.S.; Bernaert, H.; De Vuyst, L. 2008. Fermentation of cocoa beans: influence of microbial activities and polyphenol concentrations on the flavour of chocolate. Journal of the Science of Food and Agriculture 88(13): 2288–2297.
Carrillo, L.C.; Londoño-Londoño, J.; Gil, A. 2014. Comparison of polyphenol, methylxanthines and antioxidant activity in Theobroma cacao beans from different cocoa-growing areas in Colombia. Food Research International 60: 273–280.
Franco, R.; Oñatibia-astibia, A.; Martínez-pinilla, E. 2013. Health Benefits of Methylxanthines in Cacao and Chocolate. Nutrients 5(10): 4159–4173.
Giacometti, J.; Jolić, S.M.; Josić, D. 2015. Cocoa Processing and Impact on Composition. Processing and Impact on Active Components in Food. Editorial Academic Press. USA. Pp. 605–612.
Giacometti, J.; Muhvic D.; Pavletic A.; Ðudaric L. 2016. Cocoa polyphenols exhibit antioxidant, antiinfla-mmatory, anticancerogenic, and antinecrotic activity in carbon tetrachlorideintoxicated mice. Journal of Functional Foods 23: 177–187.
Gil, Q.J.A. 2012. Stability and antioxidant activity of catechins present in Colombian cocoa during the processes of pre-industrialization and industrialization. Master's Thesis. Universidad de Antioquia, Medellin, Colombia. 119 p.
Ioannone, F.; Di Mattia, C.D.; De Gregorio, M.; Sergi, M.; Serafini, M.; Sacchetti, G. 2015. Flavanols, proanthocyanidins and antioxidant activity changes during cocoa (Theobroma cacao L.) roasting as affected by temperature and time of processing. Food Chemistry 174: 256–262.
Kongor, J., E.; Hinneh, M.; Van de Walle, D.; Afoakwa, E., O; Boeckx, P.; Dewettinck, Koen. 2016. Factors influencing quality variation in cocoa (Theobroma cacao) bean flavour profile - A review. Food Research International 82: 44–52.
Lo Coco, F.; Lanuzza, F.; Micali, G.; Cappellano, G. 2007. Determination of Theobromine, Theophylline, and Caffeine in by-Products of Cupuacu and Cacao Seeds by High-Performance Liquid Chromatography. Journal of Chromatographic Science 45(5): 273–275.
Meng, C.C.; Jalil, A.M.M.; Ismail, A. 2009. Phenolic and theobromine contents of commercial dark, milk and white chocolates on the Malaysian market. Molecules 14(1): 200–209.
Menguy, L.; Prim, D.; Carlin-sinclair, A.; Marc, I. 2009. The Determination of Methylxanthines in Chocolate and Cocoa by Different Separation Techniques: HPLC, Instrumental TLC, and MECC. Journal of Chemical Education 86(11): 1307.
Nazaruddin, R.; Seng, L.K.; Hassan, O.; Said, M. 2006. Effect of pulp preconditioning on the content of polyphenols in cocoa beans (Theobroma Cacao) during fermentation. Industrial Crops and Products 24(1): 87–94.
Navia, O.; Pazmiño, P. 2012. Improvement of Sensory Characteristics Cocoa CCN51 through the Addition of enzymes for Fermentation Process. Thesis. Escuela Superior Politécnica del Litoral. Facultad de Ingeniería en Mecánica y Ciencias de la Producción. Guayaquil – Ecuador. 100 p.
Pedan V.; Fischer, N.; Rohn, S. 2015. An online NP-HPLC-DPPH method for the determination of the antioxidant activity of condensed polyphenols in cocoa. Food Research International 89 (Part.2): 890-900.
Pereira-Caro, G.; Borges, G.; Nagai, C.; Jackson, M. C.; Yokota, T.; Crozier, A., Ashihara, H. 2013. Profiles of Phenolic Compounds and Purine Alkaloids during the Development of Seeds of Theobroma cacao cv. Trinitario. J. Agric. Food Chem. 61(2): 427–434.
Quarmine, W.; Haagsmaa, R.; Sakyi-Dawson, O.; Asantec, F.; van Huis, A.; Obeng-Ofori, D. 2012. Incentives for cocoa bean production in Ghana: Does quality matter? NJAS - Wageningen Journal of Life Sciences 60–63: 7–14.
Rabadan-Chávez G.; Quevedo-Corona, L.; Garcia, A. M.; Reyes-Maldonado, E.; Jaramillo-Flores, M.E. 2016. Cocoa powder, cocoa extract and epicatechin attenuate hypercaloric diet-induced obesity through enhanced β-oxidation and energy expenditure in white adipose tissue. Journal of Functional Foods 20: 54–67.
Rios, V.C. 2012. Estadística y diseño de experimentos. Universidad Nacional de Ingeniería, Editorial Univer-sitaria, Perú. 261 p.
Saltini, R.; Akkerman, R.; Frosch, S. 2013. Optimizing chocolate production through traceability: A review of the influence of farming practices on cocoa bean quality. Food Control 29(1): 167–187.
Sarriá, B; Martínez-López, S.; Sierra-Cinos, J. L.; Garcia-Diz, Luis; Goya, L. Mateos, R.; Bravo, L. 2015. Effects of bioactive constituents in functional cocoa products on cardiovascular health in humans. Food Chemistry 174: 214–218.
Torres, M. 2012. Influence of the characteristics and processing of cocoa beans in the physicochemical composition and sensory properties of black chocolate. Doctoral thesis, Universitat Rovira Virgili. Cataluña, España.
Trognitz, B.; Cros, E.; Assemat S.; Davrieux, F.; Forestier-Chiron, N.; Ayestas, E.; Kuant A.; Scheldeman, X.; Hermann, M. 2013. Diversity of Cocoa Trees in Waslala, Nicaragua: Associations between Genotype Spectra, Product Quality and Yield Potential. PLoS ONE 8(1): e54079.
Zambrano, A.; Romero, C.; Gomez, A. 2010. Chemical evaluation of aroma and flavor precursors of merideño Criollo cacao during fermentation in two edapho-climatic conditions. Venezuela. Trop. 60 (2): 211-219
Received May 23, 2016. Accepted November 07, 2016.
* Corresponding author: pedro.pelaez@unas.edu.pe (P. Peláez).