Behaviour of polydiacetylene vesicles under different conditions of temperature, pH and chemical components of milk

• Autor(a) principal: Oliveira, Cristiane Patrícia de
• Data de Publicação: 2012
• Outros Autores: Soares, Nilda de Fátima Ferreira, Fontes, Edimar Aparecida Filomeno, Oliveira, Taíla Veloso de, Maradini Filho, Antônio Manoel
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: https://doi.org/10.1016/j.foodchem.2012.05.076; http://www.locus.ufv.br/handle/123456789/21392
• topic: Chromism; Colorimetric response; Sensor; Food industry

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.