. 2019 Jun 11;56(8):3823–3835. doi: 10.1007/s13197-019-03853-z

Table 5.

Hardness of gluten-free oat biscuits packed in different films and stored in light and dark conditions up to 90 days

Storage		PET/CPP_34	BOPP_40	PVC_12	BOPP/CPP_50	PE/EVOH/PP_50
Period	Condition	PET/CPP_34	BOPP_40	PVC_12	BOPP/CPP_50	PE/EVOH/PP_50
Fresh samples		20.3 ± 5.8
30 d	L	20.9 ± 4.5^a	21.6 ± 4.2^a	20.3 ± 5.5^a	22.6 ± 3.9^a	23.4 ± 7.2^a
60 d		17.4 ± 8.1^abc	16.5 ± 8.3^ac	13.5 ± 4.5^ab	19.0 ± 7.6^ac	16.6 ± 5.8^ab
90 d		19.6 ± 3.3^ac	11.1 ± 2.8^bc	14.2 ± 2.7^ab	12.0 ± 1.9^b	16.3 ± 3.5^ab
30 d	D	15.1 ± 3.2^ae	20.7 ± 3.6^a	17.3 ± 3.1^ab	20.2 ± 5.5^ac	20.6 ± 5.0^ab
60 d		12.5 ± 3.6^be	17.5 ± 2.7^abe	14.4 ± 5.2^ab	15.4 ± 2.1^bc	15.9 ± 4.7^ab
90 d		13.7 ± 3.9^ce	11.9 ± 2.9^ce	12.2 ± 6.8^b	13.2 ± 4.4^bc	15.3 ± 2.5^b

The values are expressed as mean ± SD, n = 8

A–e: Values followed by the same superscript letter in a column are not significantly different (p > 0.05) between different storage time and conditions

PET/CPP_34: polyethylene terephthalate/casting polypropylene

BOPP_40: biaxially oriented polypropylene

PVC_12: polyvinylchloride

BOPP/CPP_50: biaxially oriented polypropylene/casting polypropylene

PE/EVOH/PP_50: polyethylene/ethylene vinyl alcohol/polypropylene

30 d: day 30; 60 d: day 60; 90 d: day 90

L light, D dark