Thesis
Influence of Various Heating Method Towards the Antioxidant Activity and Physical Properties of Crispy Turkey Berry (Solanum torvum)
The turkey berry was first found in 1899 in Columbia County, Florida, and has since spread to at least
nine other nations in the Florida peninsula. Turkey berry (Solanum torvum), a nutrient-rich plant,
offers significant medicinal and culinary benefits due to its anti-inflammatory, antioxidant, and
antibacterial properties. Despite its health advantages, its consumption is limited by its bitter taste
and lack of awareness. This study aims to evaluate the effects of different heating treatments (boiling,
frying, and drying) on the antioxidant activity and physical characteristics of crispy turkey berries.
Using DPPH analysis and physical analysis (moisture content and color), the study seeks to enhance
the appeal and nutritional value of turkey berries, potentially increasing their usage in modern
cuisine while preserving cultural heritage. The processing methods included drying, drying followed
by frying, and boiling followed by drying. Moisture content was measured to evaluate the impact on
shelf life and texture, with dried samples showing the lowest moisture content (1.54 ± 0.446%)
compared to raw (50.67 ± 0.938%). Antioxidant activity was assessed using the DPPH assay, revealing
significant differences among treatments. Dried turkey berries exhibited the highest antioxidant
activity (73.07 ± 0.025%) and the lowest IC50 value (3.99 mg/ml), indicating superior potency
compared to other methods. The color analysis using L*, a*, and b* values showed substantial
changes due to processing, with dried and fried samples exhibiting the highest lightness (L*) and
redness (a*), indicating the influence of thermal treatment on color attributes.
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