title: Behaviour of polydiacetylene vesicles under different conditions of temperature, pH and chemical components of milk.
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 60days of storage. Heating for 10min 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.
authors.affiliation: Departament of Rural and Animal Technology, Universidade Estadual do Sudoeste da Bahia, Praça Primavera No. 40, Bairro Primavera, 45.700-000 Itapetinga, Bahia, Brazil.
authors.forename: Cristiane Patrícia de
authors.initials: CP
authors.lastname: Oliveira
authors.forename: Nilda de Fátima Ferreira
authors.initials: Nde F
authors.lastname: Soares
authors.forename: Edimar Aparecida Filomeno
authors.initials: EA
authors.lastname: Fontes
authors.forename: Taíla Veloso de
authors.initials: TV
authors.lastname: Oliveira
authors.forename: Antônio Manoel Maradini
authors.initials: AM
authors.lastname: Filho
mesh_terms: D000818:Animals; D002417:Cattle; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D008892:Milk / Q000737:chemistry*; D015394:Molecular Structure; D000078789:Polyacetylene Polymer; D011108:Polymers / Q000737:chemistry*; D053279:Polyynes / Q000737:chemistry*
chemical_list: D000078789:Polyacetylene Polymer; D011108:Polymers; D053279:Polyynes; C082361:polydiacetylene