Application of Modified Atmosphere Packaging on Quality of Selected Vegetables: A Review - Application of Modified Atmosphere Packaging on Quality of Selected Vegetables - page 13

Irish carrots
(cultivar
Nairobi)

OPP 35 ʼ m Carrots were cut

with :
1. Blunt machine
blade
2. Sharp machine
blade
3. Razor blade
Inoculation with E.
coli and L. innocua
strains

8 °C for 9 days The slicing

methods that
caused increased
damage on the cut
surfaces induced
microbial growth.
Samples cut with a
razor blade had
lower E. coli
numbers (1 log
CFU difference)
from both
mechanical
cutting methods.
Mesophile
numbers showed
no signifi cant
differences

Slicing using
a mild technique
that does not
cause increased
tissue damage
lowers the
possibility of
pathogens'
survival and
growth

Gleeson and
O'Beirne
( 2005 )

Grated
carrots
( Daucus
carota L .)

Film with
OTR: 3,529 mL
O 2 /kg h

ClO 2 gas treatment 7 °C—9 days ClO 2 pretreatment

signifi cantly
reduced microbial
load (1.88, 1.71,
2.6 and 0.66 log
CFU/g reduction
of APC,
psychrotrophs,
LAB and yeasts,
respectively).
Growth of APC,
psychrotrophs and
LAB was delayed
by 2 days

Sensory
attributes were
not signifi cantly
affected by ClO 2
pretreatment.
The factor that
led to sensory
rejection of
treated samples
was off-odors
formation

Shelf life
extension
achieved by
gaseous chlorine
dioxide
pretreatment was
one day due to
increased yeast
contamination

Gomez- Lopez
et al. ( 2007a ,
b )

EMA: 4.5 % O 2 /8.9 %
CO 2

(continued)