<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Andean grains (i.e. quinoa, amaranth) have been increasingly studied in recent times, mainly due to the increase in international consumption. However, Andean tubers other than potatoes have not been so widespread and are mainly studied for their starch, previously extracted. This work studied the morphology of native starch in four of these crops (oca, olluco, isaño and aracacha), during cooking and the evolution of their internal temperature in relation to sensory acceptability. Using scanning electron microscopy, it was determined that the size of crude starch granules was between 9 μm to 38.2 μm for oca, 4.48 to 24.9 μm for olluco, 4.45 to 22.9 μm for isaño, and 5.36 to 23.8 μm for arracacha. Sensorially, it was determined that the optimum cooking temperature for arracacha was 89.1°C, 90.9°C for oca, 91°C for isaño, and 91.4 °C for olluco. All samples had optimal cooking times shorter than potato, with the isaño having the best heat transfer.</p></abstract>

Andean grains (i.e. quinoa, amaranth) have been increasingly studied in recent times, mainly due to the increase in international consumption. However, Andean tubers other than potatoes have not been so widespread and are mainly studied for their starch, previously extracted. This work studied the morphology of native starch in four of these crops (oca, olluco, isaño and aracacha), during cooking and the evolution of their internal temperature in relation to sensory acceptability. Using scanning electron microscopy, it was determined that the size of crude starch granules was between 9 μm to 38.2 μm for oca, 4.48 to 24.9 μm for olluco, 4.45 to 22.9 μm for isaño, and 5.36 to 23.8 μm for arracacha. Sensorially, it was determined that the optimum cooking temperature for arracacha was 89.1°C, 90.9°C for oca, 91°C for isaño, and 91.4 °C for olluco. All samples had optimal cooking times shorter than potato, with the isaño having the best heat transfer.

Determination of the Morphology of the Starch Granules and the Optimum Internal Cooking Temperature of Four Andean Crops: Oca (<italic>Oxalis tuberosa</italic> Molina), Olluco (<italic>Ullucus tuberosus</italic> Loz), Isaño (<italic>Tropaeolum tuberosum</italic> Ruiz &amp; Pavon) and Arracacha (<italic>Arracacia xanthorrhiza</italic> Bancroft)

Acta Universitatis Cibiniensis. Series E: Food Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Determination of the Morphology of the Starch Granules and the Optimum Internal Cooking Temperature of Four Andean Crops: Oca ( Molina), Olluco ( Loz), Isaño ( Ruiz & Pavon) and Arracacha ( Bancroft)

Andean grains (i.e. quinoa, amaranth) have been increasingly studied in recent times, mainly due to the increase in international consumption. However, Andean...

Determination of the Morphology of the Starch Granules and the Optimum Internal Cooking Temperature of Four Andean Crops: Oca (Oxalis tuberosa Molina), Olluco (Ullucus tuberosus Loz), Isaño (Tropaeolum tuberosum Ruiz & Pavon) and Arracacha (Arracacia xanthorrhiza Bancroft)

Published Online: Dec 29, 2017

Page range: 33 - 42

DOI: https://doi.org/10.1515/aucft-2017-0013

Keywords
starch, scanning electron microscopy, cooking temperature, starch gelatinisation, andean tubers

© 2017 Omar Bellido-Valencia et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Determination of the Morphology of the Starch Granules and the Optimum Internal Cooking Temperature of Four Andean Crops: Oca (Oxalis tuberosa Molina), Olluco (Ullucus tuberosus Loz), Isaño (Tropaeolum tuberosum Ruiz & Pavon) and Arracacha (Arracacia xanthorrhiza Bancroft)

Published Online: Dec 29, 2017

Page range: 33 - 42

DOI: https://doi.org/10.1515/aucft-2017-0013

Keywordsstarch, scanning electron microscopy, cooking temperature, starch gelatinisation, andean tubers

© 2017 Omar Bellido-Valencia et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
starch, scanning electron microscopy, cooking temperature, starch gelatinisation, andean tubers