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Title: Investigation of caking by fat bridging in aged infant formula. Author: Tham TWY, Xu X, Yeoh ATH, Zhou W. Journal: Food Chem; 2017 Mar 01; 218():30-39. PubMed ID: 27719913. Abstract: Three commercial infant formulas (denoted as P1, P2 and P3) were stored at 25, 45 and 60°C for up to 6weeks to study the caking phenomenon caused by fat bridging. At 60°C, both the surface free-fat content and the caking strength increased significantly. Analysis of the fatty acid composition of P1 showed that high-melting-point fatty acids were present on powder surface whereas low-melting-point fatty acids remained within powder particles. There was no preferential migration or retention of specific fatty acids in P2. The stearic acid content in the surface free-fat of P3 increased, largely due to a concentration gradient which contributed to the increased caking strength. The melting characteristics of surface free-fat analyzed by DSC were consistent with their fatty acid compositions analyzed by GC-MS/FID. Confocal laser scanning microscopy (CLSM) showed higher occurrence of large fat globules after 6weeks' storage.[Abstract] [Full Text] [Related] [New Search]