4. Conclusions
The combination of purple yam flour (5–20 %, w/w) with the
wheat flour creates dough with a higher strength and extensible
texture, allowing salted noodles to maintain a firm and elastic form.
Moreover, the nutritional value is improved since the progressive
enrichment of salted noodles with purple yam flour results in
progressively more nutrient components. As for increasing the
amounts of yam flour, the salted noodles' processing, handling and
cooking characteristics deteriorated proportionally. The reason for
this is that these factors were attributed primarily to the gluten
fraction, which was diluted by the added yam flour fraction. The salted
noodles had a pleasant purple-red color for consumers. Supplementing
salted noodles with 15% (w/w) purple yam flour is also observed
to have equal sensory properties in the overall acceptability of the
noodles.