Production of micro and nano fibers from hazelnut skin and utilization in cakes

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Date

2013

Author

Çıkrıkçı, Sevil

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The main objective of this study was to investigate micro and nano hazelnut skin fibers and their effects on quality, texture and staling of cakes. In the first part of the study, microstructural properties of cocoa powder/ hazelnut skin samples and rheological properties of cake batter with different percentages (0%, 10%, 15%, 20%) of cocoa powder/ hazelnut skin were evaluated. Herschel–Bulkley model was found to explain the flow behaviors of dough formulations. The highest elastic (G') and loss (G'') module were obtained for dough samples containing 20% replacement of flour with microfluidized hazelnut skin fibers. Additionally, the impact of cocoa powder/ hazelnut skin samples on the quality of cakes (weight loss, color and texture) was determined. The firmest structure was obtained in cakes containing 20% replacement of flour with microfluidized hazelnut skin fiber. In the second part of the study, staling of cakes was investigated by using X-ray and FT-IR analyses. Cakes prepared with hazelnut skin which was processed by microfluidization showed the lowest starch retrogradation results indicating retardation of cake staling. Lastly, reduction of flour content in cake formulation was studied for cakes prepared with microfluidized hazelnut skin fibers. Flour reduction decreased firmness results and viscoelastic properties in microfluidized cake samples. Finally, it was found to be possible to produce cakes containing microfluidized hazelnut skin fiber with the optimization of cake formulation.

Subject Keywords

Hazelnuts., Cake., Baked products., Food texture.

URI

http://etd.lib.metu.edu.tr/upload/12616228/index.pdf
https://hdl.handle.net/11511/22942

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

S. Çıkrıkçı, “Production of micro and nano fibers from hazelnut skin and utilization in cakes,” M.S. - Master of Science, Middle East Technical University, 2013.