Physical and chemical characteristics and lycopene retention of dried tomatoes subjected to different pre-treatments
Rev. Inst. Adolfo Lutz
; 70(2): 168-174, abr.-jun. 2011. tab
Article
in English
| LILACS, Sec. Est. Saúde SP, SESSP-CTDPROD, Sec. Est. Saúde SP, SESSP-ACVSES, SESSP-IALPROD, Sec. Est. Saúde SP, SESSP-IALACERVO
| ID: lil-620809
Responsible library:
BR91.2
ABSTRACT
This study evaluated the physical and chemical characteristics (moisture, pH, acidity titratable, soluble solidsand color) and lycopene retention in dried tomatoes submitted to different pretreatments. The tomatoes were cut longitudinally and submitted to the osmotic dehydration for 120 minutes. Six osmotic solutions were used with the following concentrations NaCl 5, NaCl 10, NaCl 5 + sucrose 10, NaCl 10 + sucrose5, sucrose 5, sucrose 10 (w/v), and the osmotic dehydration was conducted with direct application of the solutes (NaCl or mixture of NaCl + sucrose). Soon afterwards the tomatoes were submitted to drying at65°C for 12 hours. The osmo-convective drying promoted an increase in the level of soluble solids, titratable acidity and reduction of the pH, except for the sucrose solutions, that did not alter the pH of the tomatoes.The ternary solution (NaCl + sucrose), binary (NaCl 10) and the direct application of the solutes promoted significant moisture reduction in relation to the control. The osmotic solutions only containing sucrose or NaCl 5 presented lycopene retention significantly superior to the other treatments. The use of the osmotic dehydration as pretreatment for drying of the tomato can contribute to accelerate the drying process and to preserve the tomato lycopene level.
Full text:
Available
Collection:
National databases
/
Brazil
Database:
LILACS
/
Sec. Est. Saúde SP
/
SESSP-ACVSES
/
SESSP-CTDPROD
/
SESSP-IALACERVO
/
SESSP-IALPROD
Main subject:
Solanum lycopersicum
/
Dehydration
/
Food Preservation
Language:
English
Journal:
Rev. Inst. Adolfo Lutz
Year:
2011
Document type:
Article