PERSONAL DE APOYO
CONSTENLA Diana Teresita
congresos y reuniones científicas
Título:
Improving the encapsulation efficinecy in the microencapsulation of fhytosterols by spray drying
Autor/es:
PACHECO, C.; DIBATTISTA, C.A.; CONSTENLA, D.; RAMIREZ RIGO, M.V.; PIÑA, J.
Lugar:
Concordia
Reunión:
Congreso; Food Innova; 2014
Resumen:
Coronary heart disease is one of the major public health problems (Ciruzzi 1997). The daily intake of phytosterols helps to reduce seric cholesterol, improving the coronary health, and provides other health benefits (among others, antioxidant andantiinflammatory effects) (Dutta 2004). However, phytosterols (PE) are only found in vegetables in lesser quantities than required and their inclusion in processed foods is limited by their waxy nature, water insolubility and high melting point (Dutta 2004, Leong 2011). To overcome these problems, phytosterols microencapsulation by spray drying was proposed. Previously, Di Battista et al. (2012) achieved the microencapsulation of phytosterols using matrices of arabic gum (AG) and maltodextrin (MD), and surfactants like sodium dodecylsulphate (SDS) and Tween 20. The best results in terms of encapsulation efficiency were found for 2 g/100 mL of SDS. Response surface methodology (RSM) is a set of mathematical techniques, used to model and optimize a response of interest, which is influenced by several variables (Montgomery 1991). RSM allows obtaining high efficiency in the development of new/improved products or process with minimum cost and time (Balasubramani 2015). The aim of this work was to analyze the influence of formulation and operating parameters on the encapsulation efficiency of phytosterols by using RSM. As formulation parameters, the total solids content, phytosterols concentration and mass ratio between AG and MD were studied. Operating parameters included the inlet temperature, atomization air flow (expressed as millimeters of rotameter) and liquid feed pump rate (expressed as percentage of total capacity of the pump). A model to fit the experimental data was established and then, an optimal set of formulation and operating conditions that maximize the encapsulation efficiency was identified.