The Suitability of Chemically Modified Starch-Based Antimicrobial Coatings for Post-Harvest Strawberry Preservation

Martins, Andressa A.; Pellá, Michelly Cristina G.; Kirchhoff, Felipe G.; Nunes, Maria Graciela I. F.; Caetano, Josiane; Dragunski, Douglas C.

doi:10.21577/0103-5053.20260059

person Andressa A. Martins

conceptualization · methodology · formal analysis · investigation

schoolUniversidade Paranaense, Campus Sede, 87502-210 Umuarama-PR, Brazil

0000-0001-8644-5411

person Michelly Cristina G. Pellá

writing review · editing

schoolDepartamento de Química, Universidade Estadual de Maringá, 87020-900 Maringá-PR, BrazilschoolDepartamento de Ciências Exatas, Universidade Federal do Paraná, 85950-000 Palotina-PR, Brazil

0000-0001-8782-8887

person Felipe G. Kirchhoff

formal analysis

schoolCentro de Engenharia e Ciências Exatas, Universidade Estadual do Oeste do Paraná, 85903-000 Toledo-PR, Brazil

0009-0009-7685-6183

person Maria Graciela I. F. Nunes

formal analysis

schoolUniversidade Paranaense, Campus Sede, 87502-210 Umuarama-PR, Brazil

0000-0001-5363-2894

person Josiane Caetano

writing review · editing

schoolCentro de Engenharia e Ciências Exatas, Universidade Estadual do Oeste do Paraná, 85903-000 Toledo-PR, Brazil

0000-0002-3074-9763

person Douglas C. Dragunski *

supervision · writing review · editing

schoolUniversidade Paranaense, Campus Sede, 87502-210 Umuarama-PR, BrazilschoolDepartamento de Química, Universidade Estadual de Maringá, 87020-900 Maringá-PR, BrazilschoolCentro de Engenharia e Ciências Exatas, Universidade Estadual do Oeste do Paraná, 85903-000 Toledo-PR, Brazil

0000-0001-7870-097X

person*e-mail:
dcdragunski@gmail.com douglas.dragunski@unioeste.br

Editor handled this article:

Andrea R. Chaves (Executive)

Sample	Thickness / nm	Water solubility / %	Opacity / %	Colorimetry
NStGelA₀	0.136 ± 0.005^bc	55.33 ± 0.86^a	1.83 ± 0.07^a	95.60 ± 0.16^a
NStGelA₃	0.150 ± 0.005^ab	29.39 ± 0.68^e	4.33 ± 0.07^b	94.42 ± 1.10^a
AcStGelA₀	0.124 ± 0.012^c	36.54 ± 0.71^c	2.92 ± 0.05^c	94.80 ± 0.88^a
AcStGelA₃	0.160 ± 0.003^a	30.26 ± 0.70^e	3.58 ± 0.20^d	95.71 ± 0.28^a
OxStGelA₀	0.154 ± 0.010^a	44.32 ± 1.09^c	1.37 ± 0.04^e	95.95 ± 0.17^a
OxStGelA₃	0.158 ± 0.005^a	33.35 ± 0.50^d	4.61 ± 0.07^f	95.31 ± 0.58^a

Sample	Storage period
Sample	Day 1	Day 2	Day 4
Control	8.16 ± 0.70^aAC	23.15 ± 1.43^aBE	33.98 ± 2.85^aDF
^NStGelA₀	4.17 ± 0.36^dAC	11.69 ± 1.00^dBE	17.88 ± 1.41^cDF
^NStGelA₃	6.43 ± 0.85^bcAC	18.19 ± 2.38^bcBE	28.03 ± 3.61^abDF
^AcStGelA₀	4.26 ± 0.66^dAC	13.36 ± 1.12^dBE	20.96 ± 1.83^cDF
^AcStGelA₃	5.34 ± 0.48^cdAC	14.97 ± 1.30^cdBE	22.67 ± 2.02^bcDF
^OxStGelA₀	4.31 ± 0.33^dAC	11.31 ± 0.50^dBE	18.31 ± 1.41^cDF
^OxStGelA₃	7.15 ± 0.56^abAC	20.04 ± 1.57^abBE	30.55 ± 2.22^aDF

Parameter	Sample	Storage period
Parameter	Sample	Day 1	Day 2	Day 4	Day 6
Firmness / N	control	0.833 ± 0.208^aABC	0.833 ± 0.231^aADF	0.700 ± 0.100^aBEH	0.633 ± 0.058^aCGH
	^NStGelA₀	0.567 ± 0.058^aABC	0.433 ± 0.058^bADF	0.567 ± 0.351^aBEH	0.600 ± 0.000^aCGH
	^NStGelA₃	0.633 ± 0.473^aABC	0.500 ± 0.173^bADF	0.833 ± 0.153^aBEH	0.700 ± 0.100^aCGH
	^AcStGelA₀	0.767 ± 0.056^aABC	0.533 ± 0.058^abADF	0.567 ± 0.289^aBEH	0.767 ± 0.158^aCGH
	^AcStGelA₃	0.633 ± 0.252^aABC	0.500 ± 0.000^bADF	0.533 ± 0.058^aBEH	0.600 ± 0.200^aCGH
	^OxStGelA₀	0.467 ± 0.115^aABC	0.433 ± 0.058^bADF	0.767 ± 0.231^aBEH	0.700 ± 0.173^aCGH
	^OxStGelA₃	0.567 ± 0.153^aABC	0.467 ± 0.058^bADF	0.667 ± 0.153^aBEH	0.567 ± 0.351^aCGH
Titratable acidity / (% of citric acid per 100 g)	control	0.963 ± 0.088^aABC	0.829 ± 0.053^abADE	0.956 ± 0.131^aBDG	0.834 ± 0.096^aCFH
	^NStGelA₀	0785 ± 0.181^cABC	0.729 ± 0.069^abADE	0.805 ± 0.129^aBDG	0.747 ± 0.063^abCFH
	^NStGelA₃	0.951 ± 0.037^abABC	0.800 ± 0.133^abADE	0.962 ± 0.072^aBDG	0.850 ± 0.111^aCFH
	^AcStGelA₀	0.831 ± 0.073^bcABC	0.909 ± 0.081^aADE	0.933 ± 0.202^aBDG	0.771 ± 0.029^abCFH
	^AcStGelA₃	0.863 ± 0.077^abcABC	0.925 ± 0.064^aADE	0.881 ± 0.133^aBDG	0.688 ± 0.070^bCFH
	^OxStGelA₀	0.759 ± 0.043^cABC	0.840 ± 0.142^abADE	0.916 ± 0.064^aBDG	0.750 ± 0.072^abCFH
	^OxStGelA₃	0.978 ± 0.060^aABC	0.846 ± 0.117^abADE	0.861 ± 0.173^aBG	0.711 ± 0.107^bCFH
Soluble solids / °B	control	7.667 ± 0.553^abAC	7.972 ± 1.752^abBFH	7.056 ± 0.429^aDG	6.833 ± 1.269^abEI
	^NStGelA₀	6.278 ± 0.861^bAC	9.111 ± 1.659^aBFH	6.139 ± 1.126^abDGJ	7.278 ± 0.195^abEIK
	^NStGelA₃	8.056 ± 0.778^abACE	7.500 ± 0.354^abBFH	6.139 ± 1.126^abDGJ	7.472 ± 0.988^aEIK
	^AcStGelA₀	6.389 ± 2.236^bACE	7.083 ± 1.728^bBFH	5.333 ± 0.500^bDGJ	6.306 ± 0.950^abEIK
	^AcStGelA₃	7.222 ± 1.986^abACE	8.472 ± 0.384^abBFH	5.611 ± 1.908^abDGJ	5.833 ± 1.192^bEIK
	^OxStGelA₀	6.250 ± 1.192^bACE	7.361 ± 0.356^bBFH	6.111 ± 0.920^abDGJ	7.667 ± 1.305^abEIK
	^OxStGelA₃	8.556 ± 1.158^abACE	6.917 ± 0.673^bBFH	5.333 ± 1.046^abDGJ	6.306 ± 0.942^abEIK
Harvest index / (°B per (% of citric acid per 100 g))	control	8.050 ± 1.235^aACE	9.736 ± 2.649^bBGI	7.467 ± 0.802^aDHJ	8.406 ± 2.270^aFIK
	^NStGelA₀	8.148 ± 0.860^aACE	12.412 ± 1.304^aBGI	7.734 ± 1.628^aDHJ	9.782 ± 0.609^aFIK
	^NStGelA₃	8.492 ± 1.037^aACE	9.698 ± 2.032^bBGI	6.368 ± 1.052^aDHJ	8.943 ± 1.858^aFIK
	^AcStGelA₀	7.792 ± 2.931^aACE	7.991 ± 2.684^bBGI	6.076 ± 1.962^aDHJ	8.213 ± 1.460^aFIK
	^AcStGelA₃	8.456 ± 2.486^aACE	9.215 ± 0.969^bBGI	6.713 ± 2.847^aDHJ	8.409 ± 0.957^aFIK
	^OxStGelA₀	8.223 ± 1.359^aACE	8.949 ± 1.308^bBGI	6.650 ± 0.659^aDHJ	10.238 ± 1.645^aFIK
	^OxStGelA₃	8.719 ± 0.816^aACE	8.036 ± 0.341^bBGI	6.298 ± 1.324^aDHJ	9.257 ± 2.958^aFIK
Vitamin C / %	control	3.100 ± 0.529^aACE	3.600 ± 0.520^aBGH	3.867 ± 0.874^aDGI	3.733 ± 0.709^aFHI
	^NStGelA₀	3.100 ± 0.173^aACE	3.600 ± 0.529^aBGH	3.433 ± 0.115^aDGI	3.733 ± 0.208^aFHI
	^NStGelA₃	2.600 ± 0.346^aACE	3.333 ± 0.208^aBGH	3.433 ± 0.115^aDGI	3.733 ± 0.551^aFHI
	^AcStGelA₀	3.433 ± 1.012^aACE	3.333 ± 0.666^aBGH	3.333 ± 0.723^aDGI	3.700 ± 0.781^aFHI
	^AcStGelA₃	2.600 ± 0.458^aACE	3.433 ± 0.252^aBGH	3.333 ± 0.404^aDGI	3.667 ± 0.551^aFHI
	^OxStGelA₀	2.967 ± 0.493^aACE	3.133 ± 0.231^aBGH	3.767 ± 0.321^aDGI	3.533 ± 0.252^aFHI
	^OxStGelA₃	2.667 ± 0.231^aACE	3.467 ± 0.252^aBGH	3.767 ± 0.252^aDGI	3.600 ± 1.039^aFHI

[1] In the same column, (mean ± standard deviation (SD)) values that do not share the same letter are statistically different at 95% of significance.

[TFN1] ^N
St: native;

[TFN2] ^Ox
St: oxidized;

[TFN3] ^Ac
St: acetylated; N: native, Ac: acetylated; Ox: oxidized; St: starch; Gel: gelatin; A: antimicrobial agents.

The Suitability of Chemically Modified Starch-Based Antimicrobial Coatings for Post-Harvest Strawberry Preservation

Abstract