FAT ABSORPTION KINETICS AND SURFACE CHARACTERISTICS OF FRIED BATTER COATED SYSTEMS

油炸面糊涂层系统的脂肪吸收动力学和表面特征

• 批准号: 217012-2012
• 负责人: Ngadi, Michael
• 金额: $ 2.11万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570082
• 关键词: FAT; ABSORPTION; KINETICS; SURFACE; CHARACTERISTICS

Batter coated foods are widely consumed in North America although there are concerns about high fat diets. It is important to develop the knowledge required for objective production of batter coated products with lower fat contents. Review of literature showed that there is very limited information available on how the core and batter coat layers interact during frying leading to fat absorption. Further, changes in the surface characteristics of the batter coating could be used to evaluate changes in batters during deep-fat frying. The goals of the proposed research project include to characterize fat and moisture transfer interactions between the core layer and batter coating in a model product during frying; study microstructural changes and fat uptake in batters formulated using different flours and ingredients; examine the influence of batter formulations and pre-heating on spatial chemical distributions at different depth profiles in a batter systems; and assess the relationship between fat absorption, surface roughness of batter layer and the different ingredients used in the batter formulation. A new cell device which allows production of reproducible batter coating with better control on the size and thickness of the layer will be used in the study. Meat analog gel model will be used as the core product under the batter coating. The batter layer will be heated in such ways to isolate heating and moisture loss in order to evaluate the separate roles of preheating and initial moisture reduction on fat absorption. Microstructural changes will be assessed by measuring porosity and pore size distributions using pycnometry and porosimetry techniques. The confocal scanning laser microscope (CSLM) and FTIR microspectroscopy techniques will be used separately to visualize spatial fat, starch and protein networks in fried products. Surface roughness will be measured using fractal analysis of surface edge images. The proposed research will develop new knowledge on microstructures and fat absorption patterns in bread coated products during deep-fat frying. It will be vital for optimization of batter formulation for reduced fat absorption in breaded fried foods. Highly qualified personnel (HQP) will be trained on the project.

尽管存在对高脂肪饮食的担忧，但面糊食品在北美被广泛消费。开发客观生产低脂肪含量面糊产品所需的知识非常重要。文献综述表明，关于油炸过程中核心层和面糊层如何相互作用导致脂肪吸收的信息非常有限。此外，面糊涂层表面特性的变化可用于评估面糊在油炸过程中的变化。拟议研究项目的目标包括表征模型产品在煎炸过程中核心层和面糊涂层之间的脂肪和水分转移相互作用；研究使用不同面粉和成分配制的面糊的微观结构变化和脂肪吸收；检查面糊配方和预热对面糊系统中不同深度剖面的空间化学分布的影响；并评估脂肪吸收、面糊层表面粗糙度和面糊配方中使用的不同成分之间的关​​系。研究中将使用一种新的电池装置，可以生产可重复的面糊涂层，并更好地控制层的尺寸和厚度。仿肉凝胶模型将作为面糊涂层下的核心产品。面糊层将以隔离加热和水分损失的方式加热，以评估预热和初始水分减少对脂肪吸收的单独作用。将通过使用比重测定法和孔隙率测定技术测量孔隙率和孔径分布来评估微观结构的变化。共焦扫描激光显微镜 (CSLM) 和 FTIR 显微光谱技术将分别用于可视化油炸产品中的空间脂肪、淀粉和蛋白质网络。表面粗糙度将使用表面边缘图像的分形分析来测量。拟议的研究将开发关于油炸过程中面包涂层产品的微观结构和脂肪吸收模式的新知识。这对于优化面糊配方以减少裹面包屑的油炸食品中的脂肪吸收至关重要。高素质人员（HQP）将接受该项目的培训。