Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/21392
Tipo: Artigo
Título: Behaviour of polydiacetylene vesicles under different conditions of temperature, pH and chemical components of milk
Autor(es): Oliveira, Cristiane Patrícia de
Soares, Nilda de Fátima Ferreira
Fontes, Edimar Aparecida Filomeno
Oliveira, Taíla Veloso de
Maradini Filho, Antônio Manoel
Abstract: Blue polydiacetylene vesicles were studied with regard to their behaviour under variations in storage temperature, heating, potentiometric titration and in the presence of chemical components of milk, to evaluate their application as a sensor in the food industry. Vesicles were prepared using 10,12-pentacosadienoic acid (PCDA)/1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC). Their changes were monitored using UV–Vis absorption. Temperatures not exceeding 25 °C did not cause colour change in PCDA/DMPC vesicles for a period of up to 60 days of storage. Heating for 10 min at 60 and 90 °C, exposure to pH higher than 9.0 and the simulant solutions of the whey proteins, β-lactoglobulin and α-lactalbumin, promoted colour change from blue to red for the vesicles studied. The effects of routine factors on the characteristics and stability of polydiacetylene vesicles is important in defining the parameters related to their application as a sensor for the food industry.
Palavras-chave: Chromism
Colorimetric response
Sensor
Food industry
Editor: Food Chemistry
Tipo de Acesso: Open Access
URI: https://doi.org/10.1016/j.foodchem.2012.05.076
http://www.locus.ufv.br/handle/123456789/21392
Data do documento: 1-Dez-2012
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