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Molecules

Title:		Production of volatile compounds in reconstituted milk reduced-fat cheese and the physicochemical properties as affected by exopolysaccharide-producing strain
Author(s):		Wang W; Zhang L; Li Y;
Address:		"School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China. wangweijunid@yahoo.com.cn"
Journal Title:		Molecules
Year:		2012
Volume:		20121205
Issue:		12
Page Number:		14393 - 14408
DOI:		10.3390/molecules171214393
ISSN/ISBN:		1420-3049 (Electronic) 1420-3049 (Linking)
Abstract:		"The application of the exopolysaccharide-producing strains for improving the texture and technical properties of reduced-fat cheese looks very promising. Streptococcus thermophilus TM11 was evaluated for production of reduced-fat cheese using reconstituted milk powder (CRMP). The physicochemical analysis of fresh and stored cheeses showed that this strain slightly increased moisture content resulting in cheese with higher yield and lower protein content compared to the direct acidified cheese. The volatiles of cheese were determined by SPME and GC equipped with a mass spectrometer. The results indicated that the major compounds included aldehydes, ketones and acids, whereas, alcohols and branched-chain aldehydes that contribute to exciting and harsh flavors were not found in CRMP. By the textural profile analysis, we found the cheese made with S. thermophilus TM11 had lower cohesiveness, resilience and higher adhesiveness than the direct acidified cheese, and had similar hardness. Further, S. thermophilus TM11 greatly changed the protein matrix with more opened cavities according to observation by scanning electron microscopy. Consequently, use of S. thermophilus TM11 could endow CRMP with the novel and suitable flavor properties and improved texture quality"
Keywords:		Acids/analysis/chemistry Alcohols/analysis/chemistry Aldehydes/analysis/chemistry Animals Cheese/analysis/*microbiology *Chemical Phenomena Esters/analysis/chemistry Food Handling/methods Food Microbiology Food Technology/methods Ketones/analysis/chemistr;
Notes:		"MedlineWang, Weijun Zhang, Lanwei Li, Yanhua eng Research Support, Non-U.S. Gov't Switzerland 2012/01/01 Molecules. 2012 Dec 5; 17(12):14393-408. doi: 10.3390/molecules171214393"