Artículos de revistas
EVALUATION OF CAROTENOID LOSSES ON INDUSTRIAL DEHYDRATION AND LYOPHILIZATION OF SPINACH
Registro en:
Arquivos De Biologia E Tecnologia. Inst Tecnologia Parana, v. 36, n. 1, n. 83, n. 94, 1993.
0365-0979
WOS:A1993LN35200008
Autor
RAMOS, DMR
RODRIGUEZAMAYA, DB
Institución
Resumen
The presence of five carotenoids was confirmed in the spinach cultivar ''Nova Zelandia'': beta-carotene, violaxanthin, lutein, zeaxanthin and neoxanthin. The only provitamin A carotenoid was beta-carotene which accounted for 28% of the total carotenoid content. Losses on dehydration and lyophilization were not considerable. Beta-carotene decreased 12% and violaxanthin, lutein and zeaxanthin did not change significantly in both drying processes. Neoxanthin had an unexpected increase on air drying; this did not happen in lyophilization. The vitamin A values (retinol equivalents) were overestimated by 14 and 16% in fresh and dehydrated samples, respectively, when the beta-carotene isomers were not separated. Loss in retinol equivalents due to dehydration was 12% when calculated whithout isomer separation and 14% with separation. With freeze-drying, a significant loss of 13% was observed only when the calculation was based on the unseparated beta-carotene concentration 36 1 83 94