CHANGES IN PH AS QUALITY INDICES IN ORANGE-SPOTTED GROUPER, EPINEPHELUS COIOIDES DURING ICE STORAGE AND RELATION BETWEEN BACTERIAL COUNT

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BITA S.; NAJAFZADEH VARZI H.; KOCHANIAN P.; FAZLARA A.; MOHAMMADIAN T.; HOSSEINI A.

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Journal: JOURNAL OF AQUATIC SCIENCES Year:2010 | Volume:1 | Issue:2 Page(s): 51-61

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Title

CHANGES IN PH AS QUALITY INDICES IN ORANGE-SPOTTED GROUPER, EPINEPHELUS COIOIDES DURING ICE STORAGE AND RELATION BETWEEN BACTERIAL COUNT

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Keywords

QUALITY ASSESSMENTQ3

PHQ2

TOTAL BACTERIAL COUNTQ3

ORANGE-SPOTTED GROUPER EPINEPHELUS COIOIDESQ3

Abstract

In this study changes in PH and its relation to psychrophilic and mesophilic bacteria in orange-spotted grouper at 0, 3, 6, 9, 12, 15 and 18 days during a 18-day ice storage were investigated. The objective of this study is to measure and freshness assessment of orange spotted grouper by using PH changes as well as the growth of mesophilic and psychrophilic bacteria and limitation in its consumption due to deterioration during ice storage. The amount of PH was increased during different days of storage. According to one-way anova test the average of PH on initial days with all days showed significant difference (p<0.05). Psychrophilic bacteria had more gradual change unlike mesophilic bacteria and became prevalent with duration of ice storage. Mesophilic bacteria had increasing and decreasing fluctuation during storage period so that it was a decreasing of their number at 15th day, but since 18th day, they started to increase. Microbiologcal indices at first and last day of storage showed significant difference (p<0.05). According to the linear regression, PH showed good relation between mesophilic bacteria and storage days (R= 0.96). An increase in PH at different times of ice storage in orange spotted grouper can create favorable condition for the growth and propagation of these bacteria. Our research revealed that after 18 days of ice storage, the bacterial count specially psychrophilic bacteria was measured more than the optimum level (7.72±0.09 log cfu.g). This is an indicator of quality loss and gradual decomposition of orange spotted grouper which makes it undesirable for human consumption.

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APA: Copy

BITA, S., NAJAFZADEH VARZI, H., KOCHANIAN, P., FAZLARA, A., MOHAMMADIAN, T., & HOSSEINI, A.. (2010). CHANGES IN PH AS QUALITY INDICES IN ORANGE-SPOTTED GROUPER, EPINEPHELUS COIOIDES DURING ICE STORAGE AND RELATION BETWEEN BACTERIAL COUNT. JOURNAL OF AQUATIC SCIENCES, 1(2), 51-61. SID. https://sid.ir/paper/238421/en

Vancouver: Copy

BITA S., NAJAFZADEH VARZI H., KOCHANIAN P., FAZLARA A., MOHAMMADIAN T., HOSSEINI A.. CHANGES IN PH AS QUALITY INDICES IN ORANGE-SPOTTED GROUPER, EPINEPHELUS COIOIDES DURING ICE STORAGE AND RELATION BETWEEN BACTERIAL COUNT. JOURNAL OF AQUATIC SCIENCES[Internet]. 2010;1(2):51-61. Available from: https://sid.ir/paper/238421/en

IEEE: Copy

S. BITA, H. NAJAFZADEH VARZI, P. KOCHANIAN, A. FAZLARA, T. MOHAMMADIAN, and A. HOSSEINI, “CHANGES IN PH AS QUALITY INDICES IN ORANGE-SPOTTED GROUPER, EPINEPHELUS COIOIDES DURING ICE STORAGE AND RELATION BETWEEN BACTERIAL COUNT,” JOURNAL OF AQUATIC SCIENCES, vol. 1, no. 2, pp. 51–61, 2010, [Online]. Available: https://sid.ir/paper/238421/en

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