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Rheological Properties of Extruded Fura from blends of Millet and Cowpea
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience, Structure Design. Moddibo Adama Univ., Yoal Nigeria.
Univ. of Nigeria, Nigeria.
2016 (English)In: Transactions in the Nordic Rheology Society, 2016, Vol. 24, 209-216 p.Conference paper, Published paper (Refereed)
Abstract [en]

The rheological properties of fura

extrudates with different pearl millet and

cowpea ratios (80:20, 70:30 and 100% pearl

millet flours) were studied. Extrusion cooking

was performed in a single screw extruder.

Gelatinization temperatures (Tg) were 72 oC

for Millet: Cowpea (70:30) and 71 oC for

100% pearl millet flour indicating that the Tg

increased with inclusion of cowpea flour. The

time taken to reach gelatinization temperature

(Mg) was 27 minutes for 100% pearl millet

flour higher than Millet: Cowpea 80:20 and

70:30 flour blends which recorded 25.3

minutes. Gelatinization temperatures for fura

extrudates were 62, 64.7, 65 and 66.8 oC for

millet: Cowpea 80:20, 100% traditional fura,

millet: Cowpea 70:30 and 100% extruded fura

respectively. There was general decrease in

gelatinization temperature of all products,

which can be attributed to previous

gelatinization of their starches. There were

significant differences in the viscosities of

samples at each of the temperature considered

from (30o - 90oC). At 30oC the viscosities

ranged from (4.2-17.6 Nsm-2). Traditional fura

indicated the highest viscosity at all

temperatures. The k values increased as the

temperature of fura samples decreased

generally. Flow behaviour for all fura samples

exhibited non-Newtonian types of fluids at the

test conditions since flow behaviour index (n)

for each fura sample were found to be different

from one. Traditional fura recorded the highest

value for yield stress 18.67 Nm-2, with millet:

cowpea 80:20 fura recording 8.6 Nm-2 as the

least value.

 

Place, publisher, year, edition, pages
2016. Vol. 24, 209-216 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27877OAI: oai:DiVA.org:ri-27877DiVA: diva2:1065597
Conference
The Nordic Rheology Conference NRC2016. May 30 - June 1 2016. Helsinki, Finland.
Available from: 2017-01-16 Created: 2017-01-16 Last updated: 2017-01-18Bibliographically approved

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