the effect of active packaging enriched with citral ...€¦ · roller coating cellulose based...
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The effect of active packaging enriched with Citral, Eugenol and Alginate on the storage
of ‘Strawberry Festival’ strawberry fruits Cristino Dores
Riga, 5-6 June 18 FCT UAlg- Faculdade de Ciências e Tecnologia da Universidade do Algarve
Universidade do Algarve – Faculdade de Ciências e TecnologiaPost-harvest Research Laboratory
Introduction
Active packagingconception
Material preparation
Qualityevaluation
Roller coating
Cellulose based paper(120g/m2 )
Packaging and trials preparation
Color
FirmnessTotal soluble solids
Weight lossMicrobiologicalSensory Panel
EOC
Introduction
Sodium Alginate
Citral Eugenol
Material&Methods
• AP preparation
Material&Methods
• Strawberry (fragaria x ananassa) cv Strawberry Festival
• Packaging preparation
• 8 Packages( 6 AP and 2 controls)
• 0,7,10,14 days
• Quality evaluation: color; firmness; weight loss (%) ; microbial content; total
soluble solids; anthocyanins; sensory panel
Material&MethodsTreatments
Standard package control
Standard package control w/ non enriched paper
Alginate 1%
Alginate 1%+Citral 0.3%+Eugenol0.2%
Alginate 1%+ Citral 0.6%+ Eugenol
0.4%
Alginate 2%
Alginate 2%+ Citral 0.3%+ Eugenol
0.2%
Alginate 2%+ Citral 0.6%+ Eugenol
0.4%
Results
28
30
32
34
36
38
40
0 7 10 14
b*
Days
35
38
41
44
47
50
53
0 7 10 14
L*
Days
30
32
34
36
38
40
0 7 10 14a*
Days
Results
0
2
4
6
8
10
12
14
16
18
20
0 7 10 14An
tho
cyan
ins
(mg/
g FW
Cya
nid
in 3
-glu
cosi
de)
Days
Results
3
5
7
0 7 10 14
Fir
mn
ess(
N)
Days
0
1
2
3
4
5
0 7 10 14Wei
ght
loss
(%)
Days
0
4
8
12
16
20
0 7 10 14
To
tal
solu
ble
so
lid
s
Days
Results
012345
0 7 10 14A
ero
bic
mes
op
hil
icm
icro
org
anis
ms
Lo
g10
(C
FU
/g)
Days
012345
0 7 10 14Mo
lds
and
Yea
sts
Lo
g10
(cf
u/g
)
Days
0
1
2
3
4
5
0 7 10 14
Psy
chro
ph
ilic
sm
icro
org
anis
ms
Lo
g10
(C
FU
/g)
Days
0
1
2
3
4
5
6
7Apearence
Aroma
Texture
Swetness
Acidity
Overall flavor
Initial time.
01234567
Initial time 7 days 14 days
ApearenceStandard package control
Alg.1%
Alg.1%+Ci.0,3%+Eu.0,2%
Alg1%+Ci0,6%+Eu0,4%
Alg.2%
Alg.2%+Ci.0,3%+Eu.0,2%
Alg.2%+Ci.0,6%+Eu.0,4%
Standard package controlwith non-enriched paper14 days of storage.
0
1
2
3
4
5
6
7Apearence
Aroma
Texture
Swetness
Acidity
Overall flavor
Standard package control 7 days
Alg.1% 7 days
Alg.1%+Ci.0,3%+Eu.0,2% 7 days
Alg1%+Ci0,6%+Eu0,4% 7 days
Alg.2% 7 days
Alg.2%+Ci.0,3%+Eu.0,2% 7 days
Alg.2%+Ci.0,6%+Eu.0,4% 7 days
Standard package control with non-enriched paper 7 days
7 days of storage.
Conclusions
• Fresh strawberries could be stored for at least 14 days maintaining good quality
• AP with alginate and essential oils combined showed less aerobic mesophilic bacteriagrowth
• Good acceptance of the fruit by the panellists for up to 14 days of storage
• Although there were no significant differences among active packaging, for most qualityparameters, as generally, their perform was in most cases better than control
• The effect of AP was not so evident because stored fruit were healthy selected fruit
?
Future perspectives
What can we do to improve?
• New active compounds and formulations based on the tested ones can also be improved, developed and tested
• Testing the volatilization rate of the compounds on the paper through time
• A better preservation method allowing companies to have a stock of active packaging with the same quality that they had in the moment of bought.
What can we do to adapt?
• Adapt our technology to the companies
• Prove them why they should use our technology
• Economically feasible products
COST is a funding agency for research and innovation networks. Our actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their
peers. This boosts their research, career and innovation. www.cost.eu
Acknowledgement: ActInPak is supported by COST (European Cooperation in Science and Technology).
ActInPak website: www.actinpak.eu