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The purpose of this study was to determine the effects of oyster mushroom powder addition (10, 20, and 30% levels by the replacement method with wheat flour) on the chemical and physical characteristics of biscuits. With the addition of oyster mushroom powder, an increase was observed in volume, spread ratio, and protein content of control biscuit group 5.36%, 6.87%, 40.96%, respectively. As a result of addition of mushroom powder, 26.97% decrease was observed on hardness values of the biscuit, while 5.94% increase in fracturability value was observed. According to sensorial analysis results, the 10% oyster mushroom powder in biscuit products showed the best sensory properties in terms of general acceptability and average values. FTIR was used to identify changes in functional groups such as lipids, carbohydrates, and proteins and indicated that addition of oyster mushroom powder caused increase in the protein bands and secondary structural components. Practical applications In this study, besides the production of protein‐enriched biscuits, the quality criteria of the biscuits produced using FTIR were also evaluated. This study was performed to evaluate the effect of partial replacement of oyster mushroom powder on the chemical and physical characteristics of biscuits. Biscuits containing 62% more protein than the control group was obtained. In future studies, it is aimed to produce foods enriched with natural additives and to examine the quality criteria using Fourier‐Transform Infrared Spectroscopy.

The results presented indicated that the proposed cooking method is useful to control final oil content of fried carrot slices, so indirectly limiting the daily calorie intake by consumers without spectacular losses in quality attributes. © 2016 Society of Chemical Industry.

Jerusalem artichoke has been cultivated in various regions without any special breeding technique. As a food, Jerusalem artichoke has a characteristic flavour and functional ingredients including inulin, other dietary fibers, minerals and traces of polyphenol. The production of chips from Jerusalem artichoke was examined in this study because it contains high amount of inulin. Inulin gives health promoting effects especially for the people suffering from diabetes. Firstly,chips production from Jerusalem artichoke was studied in the scope of properties like moisture, oil, color, texture, sensory. After cleaning, tubers prepared in specified size and slices were cooked in the deep fat fryer or microwave oven. The best results obtained for frying and microwave oven application of Jerusalem artichoke were obtained at 180℃ for 240s treatment time and at 600 W for105s, respectively