3.4. Sensory analysis
The evaluation of sensory odour, sensory taste and sensory
texture using a scale from 1 to 6 corresponding to a sense from
freshness to putridness are shownin Table 3. For the parameter flesh
odour, the multifactor ANOVA led to a low F-value (0.90) indicating
that the HPP pre-treatment did not affect it. Regarding flesh taste,
the multifactor ANOVA yielded an F-value of 4.15 implying that the
model was significant. The evaluation of F-values showed that taste
was mainly affected by pressure level (F-value ¼ 12.09) but the
model correlation coefficient of the model was very low (r2 ¼ 0.28).
The multifactor ANOVA of the sensory parameter texture led to an Fvalue
of 33.94 implying that the model was significant. The evaluation
of the F-values for the showed that sensory texture was
affected mainly by frozen storage time (F-value ¼ 70.46), pressure
level (F-value¼66.03) and the quadratic effect of frozen storage time
(F-value ¼ 18.21). The correlation coefficient r2of the model was
0.86. The use of HPP at low levels (150 MPa) yielded mean texture
values of 2.2 that are lower than those for frozen controls (3.1).
The scale of acceptability for consumers was from 1 to 5, being 5
the highest acceptability and 1 the lowest. The multifactor ANOVA
analysis led to an F-value of 105.91, which implied that the model
was significant (p-value probability > 0.0001). The evaluation of
the F-values for the different independent variables showed that
acceptability was affected mainly by pressure level (Fvalue
¼ 480.87) followed by frozen storage time (F-value ¼ 54.25)
and the quadratic effect of pressure level (F-value ¼ 42.47). These
results suggest a strong influence of pressure level on acceptability.
The correlation coefficient r2 of the model was 0.97. The prediction
of the model shown in Fig. 5 suggests that pre-treatments at lowpressure
levels yield a high acceptability of cooked fish. HPP