| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Chlorophyll stability in yerba maté leaves in controlled atmospheres
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| Autores: |
Morawicki,Rubén O.
Schmalko,Miguel E.
Känzig,Rodolfo G.
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| Data: |
1999-01-01
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| Ano: |
1999
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| Palavras-chave: |
Yerba maté
Chlorophyll stability
Controlled atmosphere
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| Resumo: |
The objective of this research was to investigate the stability of chlorophyll in yerba maté leaves in controlled atmospheres of CO2/air mixtures and different water activities at 25°C.Two levels of water activity were selected corresponding to saturated salt solutions of LiCl (a w=0.113) and MgCl2(a w=0.330) and three levels of CO2/air mixtures (0/100,20/80 and 40/60). The chlorophyll content was evaluated using a liquid chromatography HPLC technique. Experimental values varied between 2.16 and 0.61 mg/g of dry matter. For each sample, 5 determination were made during 58 days. Experimental values were fitted to an equation describing a first order reaction. In all cases, the agreement was good with P<3 10-3. The initial concentration of chlorophyll dropped, in average, to 30.5% after 58 days. However, after comparing the velocity constants, no differences were found between them.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100012
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/S1516-89131999000100012
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.42 n.1 1999
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| Direitos: |
info:eu-repo/semantics/openAccess
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