The influence of water activity on the stability of curcuminoid pigments in curcumin‐ and turmeric oleoresin‐ microcrystalline cellulose model systems during storage at 21 ± 1C was investigated. The water adsorption characteristic of the model systems was determined. The samples were stored under nitrogen/darkness, nitrogen/light, air/darkness and air/light at water activities of 0.33, 0.57 and 0.97. At specific time intervals, samples were analyzed spectrophotometrically for curcuminoid pigments content. The degradation of curcuminoids in every condition tested followed a first order reaction. Curcuminoid pigments were observed to be sensitive to light, however the combined effects of air and light were the most deleterious. There was no influence of water activity on the stability of curcuminoid pigments in curcumin‐ and turmeric oleoresin‐microcrystalline cellulose model systems.
A preocupação com as doenças transmitidas por alimentos acompanha o homem desde muito tempo. As doenças transmitidas por alimentos continuam sendo um grande problema para os governos, produtores, prestadores de serviços e consumidores. Segundo a Food Agricultural Organization - FAO (1998), cerca de um terço da população de países desenvolvidos é afetado por essas doenças todos os anos. Nos países em desenvolvimento, a situação é ainda mais séria. Isso significa que as doenças transmitidas por alimentos causam sofrimento humano e perdas econômicas, contribuindo negativamente com a saúde e o bem estar da humanidade e facilitando a disseminação da miséria.[...]
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