Figure 1: TBA values of the frozen and dried shrimp meat during six months of storage |
Figure 2: PV values of the frozen and dried shrimp meat during six months of storage |
Figure 3: TVN values of the frozen and dried shrimp meat during six months of storage |
Figure 4: FFA values of the frozen and dried shrimp meat during six months of storage |
Figure 5: Sensory analyses of the frozen and dried shrimp meat during six months of storage |
Samples |
g/100g dry weight |
|||||||
---|---|---|---|---|---|---|---|---|
|
Moisture |
Protein |
Fat |
Ash |
Salt |
|||
Frozen |
*78.18±0.32 |
17.25±0.35 |
1.84±0.36 |
1.99±0.01 |
- |
|||
Dried |
6.32±0.07 |
73.74±1.99 |
3.03±0.75 |
7.33±0.01 |
3.49±0.07 |
|||
Table 1: Proximate compositions of frozen (at -18 °C) and cabinet-type air dried shrimp meat |
Fatty acid composition (%) |
Condition |
||||||
---|---|---|---|---|---|---|---|
Dried |
Frozen |
||||||
Meristic acid |
C14:0 |
0.31b±0.01 |
0.32b±0.03 |
||||
Palmitic acid |
C16:0 |
18.49a±0.14 |
15.18b±0.04 |
||||
SFA |
Stearic acid |
C18:0 |
13.02c±0.01 |
13.04c±0.08 |
|||
Arachidic acid |
C20:0 |
0.41b±0.01 |
0.42b±0.03 |
||||
Behenic acid |
C22:0 |
1.13b±0.01 |
1.12b±0.10 |
||||
Palmitoleic acid |
C16:1 |
1.13b±0.01 |
1.13b±0.03 |
||||
MUFA |
Oleic acid |
C18:1 |
19.28a±0.01 |
15.32b±0.01 |
|||
Gadoleic acid |
C20:1 |
0.59b±0.01 |
0.56b±0.02 |
||||
Linoleic acid |
C18:2 |
19.67a±0.01 |
15.65b±0.19 |
||||
PUFA |
Linolenic acid |
C18:3 |
1.05c±0.01 |
1.08c±0.07 |
|||
Eicosapentaenoic acid |
C20:5 |
9.69c±0.01 |
9.68c±0.26 |
||||
Docosahexaenoic acid |
C22:6 |
8.51c±0.01 |
8.48c±0.32 |
||||
Table 2: Fatty acid compositions of frozen and dried shrimps |
Samples |
|
|
Storage (Months) |
|
|||
|
Parameters |
1 |
3 |
6 |
|||
|
L* |
49.83a±3.63 |
45.70a±0.45 |
41.89a±1.93 |
|||
Frozen |
a* |
-1.47aa±0.58 |
-1.45a±0.46 |
-0.60a±0.71 |
|||
|
b* |
-3.37a±1.21 |
-2.70a±0.90 |
-1.49b±0.13 |
|||
|
|
|
|
|
|||
|
L* |
70.56a±1.27 |
74.28a±1.00 |
76.19a±0.54 |
|||
Dried |
a* |
15.75a±0.23 |
14.50b±0.18 |
13.40c±0.33 |
|||
|
b* |
29.04a±0.57 |
26.69b±0.12 |
24.69c±0.12 |
|||
Table 3: Color parameters of frozen (at -18 °C) and cabinet-type air dried shrimp meats |
Microorganism count (cfu/g sample) |
Condition |
Storage time (month) |
|||||
---|---|---|---|---|---|---|---|
|
|
1 |
3 |
6 |
|||
Total bacteria |
Frozen |
1×101a |
1×101a |
3×101a |
|||
|
Dried |
2×101a |
6.3×101a |
1.5×102b |
|||
|
|
|
|
|
|||
Mold and yeast |
Frozen |
1×101a |
1×101a |
1×101a |
|||
|
Dried |
1×101a |
1×101a |
1.1×101a |
|||
Table 4:Counting of colonies of the frozen (at -18 °C) and dried shrimp meat |