Author : Biqing Wu
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (142 download)
Book Synopsis Understanding the Meltdown Behavior of Frozen Dessert by : Biqing Wu
Download or read book Understanding the Meltdown Behavior of Frozen Dessert written by Biqing Wu and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ice cream meltdown test has been utilized to comprehend the structural changes in ice cream. While there is broad knowledge regarding the impact of ingredients and processing conditions on meltdown, an understanding of the fundamental mechanisms by which the structure influences the meltdown process remains limited. This study aims to investigate how the structural components of ice cream (fat destabilization, overrun, and mix viscosity) influence the entire meltdown process. Additionally, a sucrose model system was designed to aid in understanding the role of rheological properties, overrun, and phase separation between milk protein-polysaccharides in the meltdown process in both aerated and non-aerated systems.The induction time, melting rate, final drip-through weight extracted from the meltdown curve as well as the height change rate and final height calculated from the height-change curve offer as parameter to describe the meltdown process. Among all the structural components examined, ice cream mix viscosity was the most important parameter on the meltdown process. Only without the stabilizer, which meant the mix viscosity was the lowest, did the extent of fat destabilization and overrun influence the meltdown process. In the non-aerated system, it was observed that the type of polysaccharides, rather than rheological properties like mix viscosity or shear-thinning behavior, influenced the melting behavior. Specifically, the anionic polysaccharide exhibited a faster melting rate compared to the neutral ones. In the aerated system, when polysorbate 80 was included, there was a positive correlation between mix viscosity and both the induction time and melting rate. However, this correlation was not observed between shear- thinning behavior and rheological properties. Considering the strong correlation between shear-thinning behavior and apparent viscosity, as well as the relatively insignificant impact of shear-thinning behavior on the meltdown process compared to the apparent viscosity, the apparent viscosity appeared to be a more suitable parameter for describing the meltdown process. When the milk protein was introduced into the system, both the phase separation behavior and its correlation with the meltdown were investigated. It was observed that the locust bean gum system prevented of phase separation after freezing-melting, attributed to the formation of cryo-gel by locust bean gum. This cryo-gel structure further contributed to the maintenance of the foam structure during the meltdown test. Overall, this study provides a deeper insight into each main component's impact on the meltdown process. This knowledge contributes to the design of healthier frozen desserts with enhanced heat resistance.