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|Type:||Artigo de periódico|
|Title:||Characterisation Of The Carotenoids And Assessment Of The Vitamin A Value Of Brasilian Guavas (psidium Guajava L.)|
|Abstract:||The carotenoids of guava cultivar IAC-4 from the State of Sõ Paulo (southeastern Brasil) were identified as β-carotene, ζ-carotene, γ-carotene, zeinoxanthin, lycopene, 5,6,5′,6′-diepoxy-β-carotene and 5,8-epoxy-3,3′,4-trihydroxy β-carotene. The principal pigment was lycopene, corresponding to 86% of the total carotenoid content (62 μg/g). β-carotene was present at 3·7 μg/g; consequently, the vitamin A was relatively low (617 IU/100g). The same carotenoids were encountered in guavas from the States of Ceará and Pernambuco (northeastern Brasil). Cis-γ-carotene and 5,8-epoxy-zeinoxanthin were also found in the samples from Pernambuco. While the lycopene contents of the northeastern fruits were equal to, or lower than, that found in guava IAC-4, the β-carotene level (5·5-11·9 μg/g) was higher, corresponding to higher vitamin A values (917-1983 IU/100 g). With respect to vitamin C, the amount detected in guava cultivar IAC-4 was much higher (97·7 mg/100 g) than those encountered in the northeastern guavas (9·2-52·2 mg/100 g). © 1986.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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