Kudzu (Pueraria lobata) plant is an edible leguminous vine. This study focused on the utilization of kudzu starch and kudzu root extract in beef patties. We hypothesized that a) physicochemical and sensory properties of beef patties formulated with kudzu starch, is comparable to those of potato starch; b) the kudzu root extract is rich in isoflavones, and isoflavones quantity is not affected during cooking. In Study I, beef patties were formulated using modified commercially available kudzu and potato starch each at 2.0, 4.0 and 6.0% (wt/wt). Starch treated beef patties were compared with respect to change in physical, chemical, color, textural and consumer responses as affected by starch type (kudzu, potato) and starch level (2, 4, 6 %). Additionally starch treated patties were compared to all-beef patties. Kudzu starch treated patties were significantly lower in moisture % (62.7 vs. 64.4), higher in fat % (9.1 vs. 8.3), protein % (26.3 vs. 24.7), hardness (9.3, vs. 6.9 N) and gumminess (3.7 vs. 1.9 N) compared to potato starch treated patties. Starch treated samples were significantly lighter in color and had lower (P <0.05) expressible moisture compared to all-beef patties. Patties with 6% kudzu or potato starch were significantly higher in cooking yield than all-beef patties. No significant difference existed in consumer overall liking scores of kudzu or potato starch treatments and control beef patties with no added starch. The overall liking scores ranged between 5 ‘neither like nor dislike’ and 6 ‘like slightly’ for all samples. In study II, kudzu root extract was prepared, and using HPLC, ten isoflavones were detected with puerarin and daidzein accounting for 95% of the total isoflavones. Beef patties were formulated with kudzu root extract at 0, 1, and 3% (wt/wt), and four isoflavones were detected in uncooked and cooked patties, considering other isoflavones diluted to undetectable levels in patties. Results indicated that cooking did not change the amount of isoflavones in beef patties. This study illustrates the characteristics of kudzu starch compared to conventionally used potato starch in meat model system and verifies the thermal stability of isoflavones in beef patties.
| Identifer | oai:union.ndltd.org:MSSTATE/oai:scholarsjunction.msstate.edu:td-2346 |
| Date | 15 December 2012 |
| Creators | Kumari, Shweta |
| Publisher | Scholars Junction |
| Source Sets | Mississippi State University |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | Theses and Dissertations |
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