Data/hora: 02/06/2024 16:33:15

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 20/06/2000
Data da última atualização: | 20/06/2000
Autoria: | TELIS, V. R. N.; SOBRAL, P. J. do A.
Afiliação: | UNESP; Universidade de Sao Paulo.
Título: | Nota previa: transicao vitrea de abacaxi liofilizado
Ano de publicação: | 1999
Fonte/Imprenta: | Brazilian Journal of Food Technology, v.2, n.1,2, p.181-184, Campinas,1999
ISSN: | 1516-7275
Idioma: | Inglês
Conteúdo: | The glass transition temperature of freeze-dried pineapple conditioned by adsorption at various water activities at 25oC, was determined by differential scanning calorimetry (DSC). The DSC traces showed a clearly visible shift in the base line at the glass transition temperature (Tg). Also, no ice formation was observed until the water activity was equal to 0.75. The glass transition curve showed that Tg decreased with increasing moisture content. The experimental data were comparable to those reported for model food systems, and were well represented by the Kwei equation. The glass transition observed was probably due to sugars present in the fruit.
Palavras-Chave: | Analise termica diferencial; Atividade de agua; DSC; Pineapple; Transicao vitrea.
Thesagro: | Abacaxi.
Thesaurus Nal: | glass transition; water activity.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (5196-1) - ADD - AP - -- - 630.05 -  - 630.05 - DIS