Effect of tannic acid (0.02% and 0.04%) and ethanolic kiam wood extract (EKWE) (0.04% and 0.08%) on
lipid oxidation and textural properties of fish emulsion sausages during 20 days of refrigerated storage
was investigated. Control samples (C) had the highest peroxide value (PV) and thiobarbituric acid-reactive
substances (TBARS) value up to day 16 and 8 of storage, respectively. With the addition of tannic acid
and EKWE, PV and TBARS values in the sausages were retarded effectively, compared to the control
(P < 0.05), especially when the tannic acid and EKWE at higher level were used. At the same level, EKWE
showed the lower ability in retarding the lipid oxidation, in comparison with tannic acid. Tannic acid at
both levels (0.02% and 0.04%) was also effective in retarding the formation of fishy odour in the samples
throughout the storage, compared to the control and EKWE treated samples (P < 0.05). Both tannic acid
and EKWE had no detrimental effect on the sensory attributes of sausages. However, EKWE treated sample
had lower L⁄ and higher a⁄ and DE⁄ values, compared to the control samples (P < 0.05). After 20 days
of storage, the sample added with 0.04% tannic acid had higher hardness, gumminess and chewiness,
compared with others (P < 0.05). Samples added with 0.04% tannic acid also displayed more compact
structure with no visible voids. Furthermore, oil droplets with smaller size were dispersed more uniformly,
compared to others. Thus, tannic acid (0.02% and 0.04%) and EKWE (0.08%) were effective in
retarding lipid oxidation and fishy odour development as well as could maintain the textural properties
of fish emulsion sausages during the refrigerated storage of 20 days.
Effect of tannic acid (0.02% and 0.04%) and ethanolic kiam wood extract (EKWE) (0.04% and 0.08%) on
lipid oxidation and textural properties of fish emulsion sausages during 20 days of refrigerated storage
was investigated. Control samples (C) had the highest peroxide value (PV) and thiobarbituric acid-reactive
substances (TBARS) value up to day 16 and 8 of storage, respectively. With the addition of tannic acid
and EKWE, PV and TBARS values in the sausages were retarded effectively, compared to the control
(P < 0.05), especially when the tannic acid and EKWE at higher level were used. At the same level, EKWE
showed the lower ability in retarding the lipid oxidation, in comparison with tannic acid. Tannic acid at
both levels (0.02% and 0.04%) was also effective in retarding the formation of fishy odour in the samples
throughout the storage, compared to the control and EKWE treated samples (P < 0.05). Both tannic acid
and EKWE had no detrimental effect on the sensory attributes of sausages. However, EKWE treated sample
had lower L⁄ and higher a⁄ and DE⁄ values, compared to the control samples (P < 0.05). After 20 days
of storage, the sample added with 0.04% tannic acid had higher hardness, gumminess and chewiness,
compared with others (P < 0.05). Samples added with 0.04% tannic acid also displayed more compact
structure with no visible voids. Furthermore, oil droplets with smaller size were dispersed more uniformly,
compared to others. Thus, tannic acid (0.02% and 0.04%) and EKWE (0.08%) were effective in
retarding lipid oxidation and fishy odour development as well as could maintain the textural properties
of fish emulsion sausages during the refrigerated storage of 20 days.
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