Application of Sago Starch in Instant Noodles
A study was conducted to investigate the effects of utilizing sago starch in the preparation of instant noodles. The first aspect of the study was to observe the effects of partial substitution of native sago starch on the amylograph profiles of the composite flours and the textural quality of th...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2001
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/8450/1/FSMB_2001_24_IR.pdf |
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| Summary: | A study was conducted to investigate the effects of utilizing sago starch in the
preparation of instant noodles. The first aspect of the study was to observe the effects
of partial substitution of native sago starch on the amylograph profiles of the
composite flours and the textural quality of the instant noodles. From the study, it was
concluded that the instant noodles produced using native sago starch were of inferior
quality in terms of colour, cooking losses, texture and sensory acceptability in
comparison to the control which was prepared from 100% wheat flour. However, of
all the wheat flour/sago starch blends, the most acceptable in terms of colour and
texture from both instrumental and sensory assessment was the sample that was
substituted with 20% and below.
The second aspect of this study was to determine whether the different types of
firming agents could improve the textural quality of the instant noodles produced. The
firming agents that were used in the study were alkali mixtures of potassium and sodium carbonate, guar gum and potassium alum. The composite flour used was at
the ratio of 80% wheat flour to 20% sago starch. Based on the results, the use of the
alkali mixture or guar gum between the range of 0.5% to l.0% concentrations
produced noodles that have improved noodle colour and strength, in terms of firmness
and elasticity, consequently giving a more acceptable product compared to the
addition of potassium alum. Potassium alum can be a potential firming additive but
has to be used at concentrations of more than 1%. However, the use of potassium
alum at more than 1% levels was not studied.
Finally, the last part of the°-study- involved an investigation on the effect of partially
replacing the wheat flour in the instant noodle preparation with modified sago starch
on the textural quality of the instant noodle. The phosphorylated sago starch PSS 1
was prepared in the laboratory using a mixture of 5% sodium tripolyphosphate and
2% sodium trimetaphosphate at pH 9.5 at a temperature of 13 5°C for 2 hours whereas
a physically modified sago starch NMS22 was provided by a sago starch company.
The replacement of wheat flour with PSS1 (phosphorylated sago starch) and NMS22
up to 35% improved the textural quality of the sago starch substituted wheat noodles.
The resulting noodles became more firm and elastic when cooked. Noodles with PSS1
were preferred since there is a reduced cooking loss even at a higher substitution level
and less sticky during cooking. Otherwise, the type and the quantity of modified
starches did not affect the overall acceptability of the noodles up to 35% replacement
since only the colour was significantly affected at substitution levels greater than 35%. |
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