Using antocyanins and agar-agar as a basis for smart packaging Natalia Chesnokova, Alla Kuznetsova, Tamara Levchuk, Ludmila Kushnarenko and Ludmila Levochkina BIO Web Conf., 130 (2024) 05003 Published online: 09 October 2024 DOI: 10.1051/bioconf/202413005003