TY - JOUR
T1 - Effects of a low-shear transport system on the physicochemical characteristics of nixtamal corn flour
AU - Mercado Pedraza, Evelina Berenice
AU - Morales-Sanchez, Eduardo
AU - Reyes-Vega, Maria
AU - Gaytán-Martínez, Marcela
AU - Ortega Moody, Jorge A.
PY - 2014/6
Y1 - 2014/6
N2 - Extrusion is considered a high potential technology in the production of nixtamal corn flour (NCF); however, shear force and high temperature produce starch dextrinization, modifying the quality characteristics of NCF. This investigation evaluated the effect of feed moisture, temperature, calcium hydroxide and speed in a low-shear transport system (LSTS) on water absorption index (WAI), water solubility index (WSI), relative viscosity, pH and color of NCF. Feed moisture and temperature had a significant effect on most of the characteristics of the NCF, while speed of transport and calcium hydroxide did not. NCF obtained from the LSTS presented a higher WAI and a lower WSI, relative viscosity and luminosity than NCF produced by the traditional method; however, differences between them were not significant. Lack of difference in WSI between NCF produced by both methods indirectly show that LSTS produces a low dextrinization. Practical Applications: The most common corn food products elaborated from nixtamal corn flour (NCF) are snacks, tortilla, porridge and tamal. The low-shear transport system (LSTS) may be used to produce NCF appropriate for any of these final products surpassing the extrusion-cooking process, which is mainly used to produce snacks. According to the results of this investigation, it is possible to use LSTS to obtain NCF with a lower degree of dextrinization, improving NCF quality.
AB - Extrusion is considered a high potential technology in the production of nixtamal corn flour (NCF); however, shear force and high temperature produce starch dextrinization, modifying the quality characteristics of NCF. This investigation evaluated the effect of feed moisture, temperature, calcium hydroxide and speed in a low-shear transport system (LSTS) on water absorption index (WAI), water solubility index (WSI), relative viscosity, pH and color of NCF. Feed moisture and temperature had a significant effect on most of the characteristics of the NCF, while speed of transport and calcium hydroxide did not. NCF obtained from the LSTS presented a higher WAI and a lower WSI, relative viscosity and luminosity than NCF produced by the traditional method; however, differences between them were not significant. Lack of difference in WSI between NCF produced by both methods indirectly show that LSTS produces a low dextrinization. Practical Applications: The most common corn food products elaborated from nixtamal corn flour (NCF) are snacks, tortilla, porridge and tamal. The low-shear transport system (LSTS) may be used to produce NCF appropriate for any of these final products surpassing the extrusion-cooking process, which is mainly used to produce snacks. According to the results of this investigation, it is possible to use LSTS to obtain NCF with a lower degree of dextrinization, improving NCF quality.
UR - http://www.scopus.com/inward/record.url?scp=84902383849&partnerID=8YFLogxK
U2 - 10.1111/jfpp.12094
DO - 10.1111/jfpp.12094
M3 - Artículo
SN - 0145-8892
VL - 38
SP - 1330
EP - 1338
JO - Journal of Food Processing and Preservation
JF - Journal of Food Processing and Preservation
IS - 3
ER -