Valorization of kidney bean (Phaseolus vulgaris L.) pod powder: Multifactorial optimization of gluten-free cake.

The lifelong gluten-free diet of celiac patients and gluten-intolerant people prevents their balanced diet mainly due to starch-rich products. The aim of this study is to determine optimum gluten-free cake formulation having kidney bean (Phaseolus vulgaris L.) pod powder as fat replacer of up to 50% and rice flour replacer of up to 30% using multifactorial optimization approach. Central composite design was used to determine optimum formulation. The use of kidney beans in gluten-free cake increased moisture, hardness, chewiness, L*, a*, b*, antioxidant activity, total phenolic content, and sensory evaluation scores (p < .05). The optimum gluten-free cake is rich in protein (5.89%), phenolic compounds (0.51 mg GAE/g), antioxidant activity (1.93 µmol TE/g), and total dietary fiber (4.43%) with improved sensory properties. The optimum gluten-free cake formulation prepared with kidney bean pod powder of 27.88% fat and 13.52% rice flour replacer provides higher specific volume, springiness, total phenolic content, antioxidant activity, and sensory analysis scores, and lower hardness and chewiness conditions. Gluten-free cake containing kidney bean pod powder as fat and rice flour replacer at optimum ratio is a new healthier alternative with reduced fat content and improved nutritional and sensory properties for celiac patients and gluten-intolerant people.

Fermented cereal soup with artichoke (Cynara scolymus L.) bracts: volatile profile, functional, powder and sensory properties.

BACKGROUND: Artichoke (Cynara scolymus L.) bracts are agricultural wastes formed during artichoke processing. Artichoke bracts are used in fermented cereal soup tarhana to replace 10%, 20%, and 30% of wheat flour and functional, powder, sensory properties and volatile compounds of tarhana samples were investigated. RESULTS: The use of artichoke bracts in tarhana increased total (8.37-17.17 g/100 g) and insoluble dietary fiber (5.84-14.09 g/100 g), total phenolic content (2.88-3.62 mg GAE/g), and antioxidant activity (3.07-3.86 µmol TE/g) values. Replacement of wheat flour by artichoke bracts resulted in lower L*, a*, and b* values. While water absorption capacity increased, oil absorption capacity and emulsifying activity were not affected by artichoke bracts replacement. Artichoke bracts replacement in tarhana influenced powder characteristics as, decrease in bulk density, increase in Carr index, wettability, and dispersibility values. Volatiles from terpene are most abundant (64.47-27.17 mg/kg) in tarhana containing artichoke bracts, followed by volatiles from ester (42.91-25.85 mg/kg). Limonene was the main volatile compound of tarhana samples. CONCLUSION: Sensory acceptable tarhana was obtained when up to 30% artichoke bracts were used as wheat flour replacer in tarhana. The contribution to sustainability was achieved, and a healthier tarhana rich in dietary fiber was obtained by using artichoke bracts in tarhana. © 2023 Society of Chemical Industry.

Optimization of Headspace-Solid Phase Microextraction (HS-SPME) technique for the analysis of volatile compounds of margarine.

The objective of the study was to develop optimum Headspace-Solid Phase Microextraction (HS-SPME) conditions for determining volatile compounds of margarine. The effects of fiber type, extraction temperature, extraction time on extraction rates of 2,3 butandione, dimethyl disulfide, nonanal, butanoic acid, hexanoic acid, octanoic acid, γ-nonalactone, δ-decalactone, total area and number of volatile compounds were investigated. A response surface methodology was applied using three independent variables such as fiber type, extraction temperature and extraction time. The fiber type, extraction temperature and extraction time were arranged with Box-Behnken design. The results shows that extraction temperature and extraction time affect both total area and number of volatile compounds but fiber type effect total area of volatile compounds. The optimum HS-SPME conditions were determined as 47.54 °C extraction temperature and 33.63 min extraction time using DVB/CAR/PDMS fiber type.