Table 5.

The most used keywords (rank based on total link strength).

SCR	Keywords	Occurrences	Total link strength
1	Active packaging	445	835
2	Food packaging	85	199
3	Antimicrobial	73	198
4	Antioxidant	71	181
5	Chitosan	74	167
6	Antimicrobial activity	49	111
7	Essential oil	49	101
8	Antioxidant activity	42	93
9	Nanocomposite	35	92
10	PLA	33	76
11	Shelf life	36	75
12	Biopolymer	26	67
13	Edible file	21	65
14	migration	27	61
15	Active food packaging	29	58