Composition of vitamins and amino acids in Latvian cranberries
2011
Dorofejeva, K., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology | Rakcejeva, T., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology | Kviesis, J., Latvia State Inst. of Fruit-Growing, Dobele (Latvia) | Skudra, L., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Food Technology
Berries contain a diverse array of nutrients with recognized biological activities that promote or contribute to health. The content and diversity of vitamins is often the basis for promoting increased daily intake of berries. The current research focuses on the evaluation of vitamins and amino acid content in wild and cultivated cranberries grown in Latvia. The research was accomplished on fresh Latvia wild growing (Vaccinium oxycoccus L.) and cultivated cranberries (Vaccinium macrocarpon Ait.) harvested in Kurzeme region: wild cranberries and cranberries cultivars ‘Early Black’, ‘Ben Lear’, ‘Stevens’, ‘Bergman’ and ‘Pilgrim’. The following quality parameters of cranberries were controlled using standard methods: vitamin E (AOAC 971.30), vitamin B1 (AOAC 986.27), vitamin B2 (AOAC 970.65), vitamin C (LVSEN 14130:2003), amino acids except tryptophan (ion-exchange method), tryptophan (spectrophotometric method). The results of current research demonstrate that very similar vitamin C content was detected in cranberry cultivars: ‘Stevens’, ‘Bergman’ and ‘Ben Lear’. The lowest vitamin C content was detected in wild cranberries and cranberry cultivar ‘Early Black’, 46.98±3.42 and 47.48±3.42 mg·100 gE-1 in dry matter (DM) respectively. During current research it was found, that the content of vitamin B1 and B2 in cranberries was similar. The higher vitamin E content was found in wild and cranberry cultivars ‘Ben Lear’ and ‘Pilgrim’, ie., 1.56 mg 100gE-1, 1.50 mg 100gE-1 and 1.58 mg 100gE-1 in DM respectively. Higher essential amino acid content was found in wild and cranberry cultivars ‘Bergman’, ‘Pilgrim’ and ‘Early Black’ 1.94 g 100gE-1, 2.06 g 100gE-1, 1.83 g 100gE-1 and 2.23 g 100gE-1 in DM respectively.
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