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    Deep fried wheat chips added with potato peel flour-Effect on quality parameters
    (Codon Publications, 2021) Durmaz, Aysun; Yuksel, Ferhat
    The aim of this study was to investigate some physicochemical, bioactive, nutritional, and sensory properties of wheat chips enriched with potato peel flour (PPF) at six different concentrations (0, 2, 4, 6, 8, and 10% w/w). Lipid content of the samples were in the range of 45.57-27.46 g/100 g and lipid content of chips decreased (by 40%) significantly (P < 0.05) with the incorporation of PPF. Minimum and maximum hardness levels were 13.32 kg and 22.64 kg, as determined in the control sample and the chips enriched with 8 g/100 g PPF, respectively. Total phenolic of the chips was in the range of 364.7-1108.0 mgGAE/kg and increased significantly (P < 0.05) with increasing of the PPF. In addition, total dietary fiber content of the samples also increased (by 29%) significantly (P < 0.05) by PPF incorporation while the in vitro glycemic index content of samples decreased (P < 0.05). Sensory evaluation revealed that the chips with PPF (by 10%) were more preferred. In this study, alternative chips were produced using PPF.
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    Effect of rice flour incorporation on some physicochemical, color, rheological, bioactive and sensory properties of a new pestil formulation: one factor design approach and optimization
    (Springer India, 2022) Levent, Okan; Yuksel, Ferhat
    Pestil is a special and a traditional food produced with wheat flour or a starch, water and molasses. In this study, a new pestil formulation was developed using different concentrations of rice flour (0-12%). One factor design (Response surface methodology) approach was used to determine the some physicochemical, rheological, bioactive, color and sensory properties of newly formulated pestil products. Also, an optimization study was performed to reveal the most-liked samples using the sensory analysis results. Dry matter levels ranged between 86.87 and 96.55 g/100g while the protein contents were in the range of 4.18-5.91 g/100g. Maximum and minimum total phenolic and antioxidant activity levels of the samples were observed for the samples coded as R4 and R5 with 1471.93-887.91 mg GAE/kg and 17701.65-12684.09 mg AAE/kg, respectively. The dynamic rheological properties of the pestil samples were significantly affected by the rice flour addition (p < 0.05). The optimization results showed that the best pestil formulation can be produced by incorporating 0.44 g/100g rice flour. In conclusion, the rice flour could be assisted to pestil production in the formulation for better pestil production.
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    Effects of addition of stale bread flour on the acrylamide, fatty acid composition, resistant starch content, and in vitro glycemic index in wheat chips production using response surface methodology
    (Elsevier, 2022) Yuksel, Ferhat; Kayacier, Ahmed
    In the world, breads were wasted by consumers due to staling and the aim of the study is to develop a new snack food by fortification of wheat chips with stale bread flour (SBF). The effect of process variables on some chemical properties and fatty acid of the chips were investigated by response surface methodology. The coefficient of determination (R-2) of the response models ranged from 0.61 to 0.92, revealing that the models adequately explained the variability in the responses. The acrylamide of the enriched chips increased with both increasing frying temperature and SBF content. The addition of SBF into the chips dough increased the contents of protein (by 13%) and resistant starch (by 58%) of the end products. The maximum GI content was determined as 88.94, while the minimum GI content was 80.59 and the addition of SBF decreased the GI of the chips by 10% although this decrease was not statistically significant. According to the optimization parameters, the best chips were those containing 50% SBF, fried at 183 degrees C for 40 s. It was concluded that the SBF could be added to the formulation of wheat chips to offer an alternative snack for consumers.
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    Evaluation of By-Products of Potato Peel as Food Additive
    (Bentham Science Publ Ltd, 2022) Yuksel, Ferhat; Durmaz, Aysun
    The potato plant is an important food source produced all over the world and it provides a significant portion of daily energy intake in nourishment. In addition, a significant rate of vitamins, fibre, mineral matters, protein, and fat can be obtained by consuming potato. In this study, the production, consumption, and usage areas of potato, a crucial source of our diet, and the possibilities of using it as food additives with the nutritional properties of its peel have been investigated. Generally, potato is consumed after its peel is removed in the homes and industrial areas and many of these peels are disposed off as wastes. Studies show that potato peel has a high content of dietary fibre, protein, carbohydrate, mineral matters, vitamin, phenolic, and antioxidant. The use of potato peel as food additives have also been discussed in this study.
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    In vitro glycemic index, acrylamide content, and some physicochemical and sensorial properties of special dried bread (Peksimet) enriched with einkorn wheat (Tiriticum monococcum L.) flour
    (Springer India, 2024) Yuksel, Ferhat; Caglar, Sumeyye
    In the present study, einkorn wheat flour (Tiriticum monococcum L.) was incorporated into a special dried bread (peksimet) formulation produced from sourdough breads at different concentrations (0-10-20-30-40 and 50 g 100 g(-1)) and some physicochemical and nutritional (total dietary fiber, resistant starch, glycemic index, acrylamide content) characteristics and sensory properties of the samples were investigated. The total dietary fiber content of the bread samples ranged from 3.00 to 6.17 g 100 g(-1). The highest acrylamide content (247.54 mu g/kg) was obtained using an einkorn flour level of 40 g 100 g(-1). Einkorn wheat flour resulted in a significant decrease (from 94.61 to 89.23) in the glycemic index level of the bread samples (p < 0.05). Bread enriched with einkorn wheat flour (50.0 g 100 g(-1)) received the highest overall acceptability score. In conclusion, einkorn wheat flour could be used in a special dried bread formulation to enhance its nutritional quality.
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    In vitroglycemic index, antioxidant capacity and some physicochemical characteristics of deep-fried sorghum based gluten free chips
    (Springer India, 2021) Kaplan, Mahmut; Yuksel, Ferhat; Karaman, Kevser
    In this study, deep fried gluten free chips were manufactured using sorghum flour at different concentrations (5, 20, 35 and 50 g/100 g) and in vitro glycemic index, total antioxidant capacity and some physicochemical characteristics (dry matter, ash, oil, protein and color) and overall acceptability of the samples were investigated. Protein, oil and total dietary fiber levels of the samples ranged between 5.39-8.28, 23.58-29.10 and 5.59-6.60 g/100 g, respectively and increase in sorghum flour level resulted in an increase in these studied quality parameters of the chips samples. Ferric reducing antioxidant activity and DPPH radical scavenging performance were affected positively by the addition of sorghum flour. Total starch hydrolysis index and estimated glycemic index values were affected by the sorghum flour addition negatively due to the increased total dietary fiber content of the chips samples. All chips samples enriched with sorghum flour showed similar overall acceptability and increased sorghum concentration decreased the preference scores slightly. All these results could be considered for the manufacturing of the gluten free deep fried sorghum based chips samples.
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    Some physicochemical, color, bioactive and sensory properties of a pestil enriched with wheat, corn and potato flours: An optimization study based on simplex lattice mixture design
    (Elsevier, 2022) Yuksel, Ferhat; Yavuz, Busra; Baltaci, Cemalettin
    In this study, a dried fruit roll up (pestil) was produced by using different concentrations of wheat, corn and potato flours. Simplex lattice mixture design technique was performed to determine the best flour mixture levels. The highest Hydroxymethylfurfural (HMF) was observed in the 13th sample with 6.60 mg/kg; and the lowest was in the 4th sample with 1.42 mg/kg. It was observed that the total phenolic content of the samples varied between 783.0 and 2154.8 mg GAE/kg and this variation was significant (p < 0.05). Significant increases in the antioxidant activities (total antioxidant and DPPH) of the samples were also determined in the pestil samples. Generally, sensory properties of the pestil samples significantly decreased by the increase of potato flour in the mixture and corn and wheat flours exhibited similar sensory properties. The optimum flour mixture was determined according to the sensory analyses, and it was determined that the best pestil formulation can be produced by incorporating 4.69 g wheat flour and 7.39 g corn flour per 100 g.