Sensory analysis, instrumental analysis and consumers' acceptance toward multifunctional ice creams

Title from PDF of title page (University of Missouri--Columbia, viewed on August 29, 2012).The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.Dissertation advisor: Dr. Ingolf GruenIncludes bibliographical references.Vita.Ph. D. University of Missouri--Columbia 2012Dissertations, Academic -- University of Missouri--Columbia -- Food science"May 2012"The task of this study was to develop a multifunctional ice cream which can deliver multiple functional ingredients to consumers. A descriptive sensory analysis was carried out to investigate the effect of adding varying levels of dietary fiber (0%, 5%, 10% and 15%) to a multifunctional ice cream that contained fixed levels of antioxidants (12% of aҫai), prebiotics (4%) and probiotics (108 cfu/ mL) on sensory properties. The results showed that an increase in dietary fiber contents significantly increased the perceptions of gooeyness, gumminess, creaminess, mouth coating, sweetness, sweetness aftertaste, and wood flavor aftertaste, but decreased the perceptions of hardness and iciness. Based on a texture analysis, dietary fiber increased the overrun and viscosity, but decreased the melting rate of ice creams. The antioxidant capacities and flavor profiles of aҫai puree and multifunctional ice creams were also determined. Moreover, consumers' degree of liking for multifunctional ice creams was measured by a hedonic sensory study. The results indicated that consumers preferred 0% and 5% dietary fiber containing multifunctional ice creams. Even though ice cream containing 5% dietary fiber showed some differences to the control ice cream in the descriptive and instrumental analyses, there was no significant difference in consumers' preference. Therefore, an ice cream containing 5% of dietary fiber, 4% of prebiotic, 108 cfu/ mL of probiotic and 12% of aҫai can be considered an ideal formulation for a multifunctional ice cream