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J Sci Food Agric

Title:		Significance of osmotic temperature treatment and storage time on physical and chemical properties of a strawberry-gel product
Author(s):		Martin-Esparza ME; Escriche I; Penagos L; Martinez-Navarrete N;
Address:		"Food Technology Department, Institute of Food Engineering for Development, Universidad Politecnica de Valencia, Camino de Vera s/n, E-46022 Valencia, Spain"
Journal Title:		J Sci Food Agric
Year:		2011
Volume:		20110106
Issue:		5
Page Number:		894 - 904
DOI:		10.1002/jsfa.4262
ISSN/ISBN:		1097-0010 (Electronic) 0022-5142 (Linking)
Abstract:		"BACKGROUND: The development of fruit-based foods that maintain the nutritional and sensory properties of fresh fruit may help to stimulate fruit consumption by consumers. The possibility of formulating a fruit-gel product with osmodehydrated fruit and the reused osmotic solution (OS) obtained from the dehydration step has been demonstrated. However, the conditions of the osmotic process can significantly affect the properties of the obtained product. In this work an osmotic process at 22 degrees C for 6 h and at 30 degrees C for 3 h was employed to formulate a strawberry-gel product. RESULTS: Significant losses of ascorbic and citric acids and anthocyanins were observed and some relevant volatile compounds of the strawberry aroma profile were developed during the osmotic process. Changes in all analysed parameters occurred mainly during the first 2 days of storage. The flux of anthocyanins from the fruit to the gel gave an attractive appearance to the formulated product. These changes were more marked for samples obtained at 30 degrees C. CONCLUSION: Osmotic treatment at 30 degrees C was more suitable for formulation of the product, because the presence of nutritional/functional compounds in the OS, and consequently in the gel matrix, was higher and the aroma and colour were more stable and homogeneous during storage"
Keywords:		Anthocyanins/metabolism Ascorbic Acid/metabolism Citric Acid/metabolism *Desiccation Food Handling/*methods Food Technology/*methods Fragaria/chemistry/*metabolism Fruit/chemistry/*metabolism Gels/chemistry Odorants/analysis *Osmosis *Temperature Time Fac;
Notes:		"MedlineMartin-Esparza, Maria Eugenia Escriche, Isabel Penagos, Lucas Martinez-Navarrete, Nuria eng Research Support, Non-U.S. Gov't England 2011/03/09 J Sci Food Agric. 2011 Mar 30; 91(5):894-904. doi: 10.1002/jsfa.4262. Epub 2011 Jan 6"