Related Experiment Video
Updated: Dec 24, 2025

High-throughput, Microscale Protocol for the Analysis of Processing Parameters and Nutritional Qualities in Maize Zea mays L.
Published on: June 16, 2018
Physicochemical Properties and Resistant Starch Content of Corn Tortilla Flours Refrigerated at Different Storage
Isela Rojas-Molina1, Monsserrat Mendoza-Avila1,2, María de Los Ángeles Cornejo-Villegas3
1Laboratorio de Química Medicinal, Facultad de Química Universidad Autónoma de Querétaro, Cerro de las Campanas S/N, Centro Universitario, Querétaro C.P. 76010, Mexico.
Abstract:
The tortilla is a foodstuff that has a short shelf-life, causing great losses to the industry. The objective of this work was to evaluate, for the first time, the physicochemical properties and resistant starch (RS) content of flours. These were obtained from nixtamalized corn tortillas made with traditional and industrial (commercial) methods, stored at 4 °C for 7, 15, and 30 days. The flours were characterized by measuring particle size distribution, color, water absorption index (WAI), water solubility index (WSI), viscosity, calcium, and RS content. Additionally, chemical proximate analysis, scanning electron microscopy (SEM), and thermal analysis were conducted. Storage at 4 °C increased the friability of tortillas and shifted the particle size distribution toward a greater content of coarse particles in corn tortilla flours. The commercial corn tortilla flours showed higher WAI and WSI values than the traditional corn tortilla flours. On the other hand, the traditional corn tortilla flours exhibited higher RS content values than commercial corn tortilla flours as well as peak viscosity. X-ray diffractograms revealed the presence of amylose-lipid complexes (RS5) in experimental samples. The thermograms evidenced three endotherms corresponding to corn starch gelatinization and melting of type I and type II amylose-lipid complexes.
More Related Videos
05:22Transverse Sectioning of Mature Rice Oryza sativa L. Kernels for Scanning Electron Microscopy Imaging Using Pipette Tips as Immobilization Support
Published on: January 25, 2022
07:19Quantifying Plant Soluble Protein and Digestible Carbohydrate Content, Using Corn Zea mays As an Exemplar
Published on: August 6, 2018
Related Concept Videos
Responses to Heat and Cold Stress
Frost Resistant Concrete
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
Drug Product Stability
Physical Methods for Controlling Microbial Growth: Temperature
Bioavailability Enhancement: Drug Stability Enhancement and GI Retention