TY - JOUR
T1 - Physical properties of spray dryed Stenocereus griseus pitaya juice powder
AU - García-Lucas, Karina A.
AU - Méndez-Lagunas, Lilia L.
AU - Rodríguez-Ramírez, Juan
AU - Campanella, Osvaldo H.
AU - Patel, Bhavesh K.
AU - Barriada-Bernal, Luis Gerardo
N1 - Publisher Copyright:
© 2016 Wiley Periodicals, Inc.
PY - 2017/6
Y1 - 2017/6
N2 - The aim of this work was to analyze the effect of spray drying conditions on the physical properties of pitaya juice powder using a 23 factorial design. Independent variables were inlet air temperature (150 and 180°C), feed flow rate (1.5 and 2 L/hr), and the amount of encapsulants (60 and 90%). The spray process was performed on pilot-scale spray dryer and maltodextrin/pectin combination was used as encapsulating material. Moisture content, yield, color, water adsorption, glass transition temperature, and morphology of pitaya juice powders were analyzed. Critical conditions of storage, at which the glass transition occurs were determined. Experimental results showed that all the individual factors had a significant effect on moisture content and color, however, yield was only affected by feed flow rate and percentage of encapsulants. Lower drying temperatures (150°C) favored higher yield of 59% and privileged red-violet color retention during spray drying. The GAB and Gordon-Taylor models gave good fit for the experimental data of adsorption isotherms and glass transition temperatures, respectively. Practical Applications: In this work betalains with compounds including nutraceutical properties, which can be used as a dye, were encapsulated. The knowledge of the properties of natural products, with potential either as an additive or as a colorant, is of great significance for applications in both the food and pharmaceutical industry. The efficiency, color, morphology of powders, and properties influencing hygroscopicity, collapse, compression, and agglomeration were determined. These factors control the processability, handling properties, and the stability of pitaya powders.
AB - The aim of this work was to analyze the effect of spray drying conditions on the physical properties of pitaya juice powder using a 23 factorial design. Independent variables were inlet air temperature (150 and 180°C), feed flow rate (1.5 and 2 L/hr), and the amount of encapsulants (60 and 90%). The spray process was performed on pilot-scale spray dryer and maltodextrin/pectin combination was used as encapsulating material. Moisture content, yield, color, water adsorption, glass transition temperature, and morphology of pitaya juice powders were analyzed. Critical conditions of storage, at which the glass transition occurs were determined. Experimental results showed that all the individual factors had a significant effect on moisture content and color, however, yield was only affected by feed flow rate and percentage of encapsulants. Lower drying temperatures (150°C) favored higher yield of 59% and privileged red-violet color retention during spray drying. The GAB and Gordon-Taylor models gave good fit for the experimental data of adsorption isotherms and glass transition temperatures, respectively. Practical Applications: In this work betalains with compounds including nutraceutical properties, which can be used as a dye, were encapsulated. The knowledge of the properties of natural products, with potential either as an additive or as a colorant, is of great significance for applications in both the food and pharmaceutical industry. The efficiency, color, morphology of powders, and properties influencing hygroscopicity, collapse, compression, and agglomeration were determined. These factors control the processability, handling properties, and the stability of pitaya powders.
KW - adsorption isotherms
KW - color
KW - glass transition
KW - morphology
KW - pitaya
KW - spray drying
UR - http://www.scopus.com/inward/record.url?scp=84983732322&partnerID=8YFLogxK
U2 - 10.1111/jfpe.12470
DO - 10.1111/jfpe.12470
M3 - Artículo
SN - 0145-8876
VL - 40
JO - Journal of Food Process Engineering
JF - Journal of Food Process Engineering
IS - 3
M1 - e12470
ER -