Physicochemical Properties and Antioxidant Activity of Spray-Dry Broccoli (Brassica oleracea var Italica) Stalk and Floret Juice Powders

Molecules

Alberto Toxqui-Terán¹  César Leyva-Porras²  MaríaZenaida Saavedra-Leos³  Vicente Espinosa-Solis⁴ 

[1]Centro de Investigación en Materiales Avanzados S.C. (CIMAV), Alianza Norte No. 202, Parque de Investigación e Innovación Tecnológica (PIIT), Apodaca, Nuevo Leon 66600, Mexico

[2]Centro de Investigación en Materiales Avanzados S.C. (CIMAV), Miguel de Cervantes No. 120, Complejo Industrial Chihuahua, Chihuahua 31136, Mexico

[3]Coordinación Académica Región Altiplano, Universidad Autónoma de San Luis Potosí, Carretera Cedral Km 5+600 Ejido San José de las Trojes, Matehuala, San Luis Potosí 78700, Mexico

[4]Coordinación Académica Región Huasteca Sur, Universidad Autónoma de San Luis Potosí, Km 5, Carretera Tamazunchale-San Martin, Tamazunchale, San Luis Potosi 79960, Mexico

关键词: broccoli juice;    spray drying;    antioxidant activity;    conservation of antioxidants;    physicochemical characterization;   

DOI  :  10.3390/molecules26071973

来源: DOAJ

【 摘 要 】

This research presents the microencapsulation and conservation of antioxidants of broccoli juice processed by spray drying, and proposes the use of a by-product as a technological application. Broccoli juice (BJ) extracted from two sources, stalks and florets, was spray-dried employing maltodextrin (MX) as a carrier agent at concentrations of 5, 7.5, and 10%, and inlet temperatures of 150 and 220 °C. The total phenolic content (TPC), and antioxidant activity (AA) of the BJ-MX powders were determined together with the physicochemical characteristics, including particle morphology, microstructure, and thermal properties. Based on the TPC and AA, the optimal processing conditions found were 5% of MX and a drying temperature of 220 °C. However, the florets showed higher TPC, while stalks presented higher AA under those processing conditions. The particles exhibited micrometric sizes and a mixture of spherical-shape particles and pseudo-spherical particles. The diffractograms indicated an amorphous microstructure in all samples. The glass transition temperature (Tg) was determined in the range of 50 °C for the samples dried at 150 °C and 55 °C for those dried at 220 °C. This suggested that powders might be stored at temperatures below the Tg without presenting any loss of antioxidants.

【 授权许可】

Unknown