Agriculture Reference
In-Depth Information
Pseudomonads
PMAP 1
10
48C
PMAP 2
PMAP 3
PMAP 4
9
48C
48C
8
58C
48C
48C
7
58C
48C
PMAP 5
PMAP 6
48C
6
5
58C
PMAP 7
PMAP 8
PMAP 9
4
3
2
PMAP 10
PMAP 11
0
2
4
6
8
10
12
14
16
18
20
Storage Time (Days)
Fig. 1.4
Pseudomonas
growth on mushrooms treated and stored under modifi ed atmosphere con-
ditions [PMAP 1 and 2 with microperforated oriented polypropylene used as packaging fi lm (with
45,000 and 2,400 mL/m
2
day atm. O
2
permeabilities respectively), Simon et al. (
2005
), for PMAP
3 mushrooms treated with CaCl
2
O
2
spray (0.4 mg/mL) were packed in perforated LDPE bags, for
PMAP 4 perforated LDPE was the packaging fi lm, Kuyper et al. (
1993
), washing with ClO
2
(50 mg/mL) for 60 s and stored under PMAP 5 (PA-160 OPP fi lm used), washing with H
2
O
2
3 %
for 60 s and then stored under PMAP 6 (PA-160 used), washing into a H
2
O
2
(3 %) and sodium
isoascorbate (4 %) solution and stored under PMAP 7 (PA-160 used) and PMAP 8 was created
with the use of PA-160 fi lm after washing with H
2
O
2
(3 %) for 60 s and spraying the products with
sodium isoascorbate (4 %), Cliffe-Byrnes and O'Beirne (
2008
). Shiitake mushrooms were stored
under PMAP 9 and PMAP 10 after gamma irradiation with a dose of 1.0 and 2.0 kGy, respectively
( Jiang et al.
2010a
,
b
,
c
,
d
) PMAP 11 was prepared with the use of a PVC fi lm (12
μ
m thickness,
OTR: 25,000 mL/m
2
day atm.) after immersion of the
Agaricus bisporus
mushrooms in an aqueous
solution with 10 g/L of citric acid for 5 min (Simon et al.
2010
)
Parentelli et al. (
2007
) used a combination of passive (LDPE and PP fi lms) and
active (5 % O
2
/2.5 % CO
2
) atmosphere conditions for storage of shiitake mush-
rooms at 5 °C for 20 days. MAP retained weight loss under 6.5 % at the end of
storage. The use of atmosphere modifi cation, both passive and active, increased
deterioration rate and deteriorated sensory attributes, compared to control samples.
Roy et al. (
1996
) used sorbitol and sodium chloride (5, 10 or 15 g) in an attempt
to modify the in-package relative humidity (IPRH) of mushrooms (water irrigated
and CaCl
2
irrigated) stored in MAP (polyethylene fi lm) at 12 °C. The addition of
sorbitol kept IPRH over 80 % during the storage period. Packages containing CaCl
2
irrigated mushrooms had lower IPRH than normally grown mushrooms. NG mush-
rooms stored with 10 and 15 g sorbitol had higher
L
* values and lower
ʔ
E
values
than without sorbitol.
A research conducted led to the conclusions that
Agaricus bisporus
mushrooms
can safely be stored for 32, 44 and 108 h under passive MAP conditions with the use
of LDPE, PP and OPP fi lms, respectively.
Simon et al. (
2005
) applied MA conditions that were created passively (PVC,
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