Changes in the physicochemical properties of high pressure treated rainbow trout

Erkan, Nuray
Alpas, Hami
Uretener, Gonca
Selcuk, Arif
Buzrul, Sencer
Changes in the physicochemical quality of rainbow trout's High pressure (HP)treated at 220, 250 and 330 MPa, 7, 15 and 25 degrees C for 5 and 10 min were investigated. HP-treated rainbow trout's showed significantly increased L* value relative to untreated rainbow trout's. Little changes in colour (a* value) were observed, compared to untreated rainbow trout's, which did not showed b* values. From tests of chemical properties, HP-treated rainbow trout's did not showed or showed significantly decreased thiobarbituric acid (TBA) and trimethylamine nitrogen (TMA-N) with increasing treatment pressure compared to controls. HP-treated rainbow trout samples showed significantly increased or decreased free amino acids (P < 0.05) relative to untreated trout samples. The results obtained from this study showed that the quality of HP-treated rainbow trout is best preserved at 220 MPa, 7-15-25 degrees C for 5-10 min and 250 MPa, 7-15 degrees C for 5 min.


Use of Weibull frequency distribution model to describe the inactivation of Alicyclobacillus acidoterrestris by high pressure at different temperatures
BUZRUL, SENCER; Alpas, Hami; Bozoglu, F (Elsevier BV, 2005-01-01)
The survival curves of Alicyclobacillus acidoterrestris by high hydrostatic pressure were obtained at two pressures (350 and 450 MPa) and three temperature levels (35, 45 and 50 degreesC) in BAM broth. Tailing (upward concavity) was observed in all survival curves. Weibull model was fitted to these data and goodness of fit of this model was investigated. Regression coefficients (R-2), root mean square (RMSE) values and residual plot strongly suggested that Weibull model produced good fit to the data. A bett...
Unexpected regioselectivity observed in the bromination and epoxidation reactions of p-benzoquinone-fused norbornadiene: An experimental and computational study
Essiz, Selcuk; Dalkilic, Erdin; Sari, Ozlem; DAŞTAN, Arif; Balcı, Metin (2017-03-23)
The bromination reaction of p-benzoquinone-fused norbornadiene was studied at various temperatures (-78, 50, 0, 25, and 77 degrees C). At room temperature, the double bonds of the p-benzoquinone units were mainly brominated. The double bond of the norbornene unit also underwent a bromination reaction in a yield of only 2%. However, the reaction at -78 degrees C resulted in the formation of products derived from the attack of bromine on the norbornene double bond with higher charge density. In contrast to th...
The effect of different high pressure conditions on the quality and shelf life of cold smoked fish
ERKAN ÖZDEN, Nuray; Uretener, Gonca; Alpas, Hami; Selcuk, Arif; Ozden, Ozkan; Buzrul, Sencer (2011-04-01)
Cold smoked salmon were HP treated at 220, 250 and 330 MPa, at 3, 7, 15 and 25 degrees C for 5 and 10 min. The influences of such treatments on some quality parameters (the changes of colour, TBA and TMA values) were studied. These parameters were determined for cold smoked salmon suitable combinations (at 220-250 MPa, 3 degrees C for 5 min, at 330 MPa, 15 degrees C for 5 min and at 250 MPa, 25 degrees C for 10 min). In the second stage the shelf life of cold smoked salmon HP treated at 250 MPa, 3 degrees C...
Modeling the synergistic effect of high pressure and heat on inactivation kinetics of Listeria innocua: a preliminary study
Buzrul, S; Alpas, Hami (Oxford University Press (OUP), 2004-09-01)
The survival curves of Listeria innocua CDW47 by high hydrostatic pressure were obtained at four pressure levels (138, 207, 276, 345 MPa) and four temperatures (25, 35, 45, 50 degreesC) in peptone solution. Tailing was observed in the survival curves. Elevated temperatures and pressures substantially promoted the inactivation of L. innocua. A linear and two non-linear (Weibull and log-logistic) models were fitted to these data and the goodness of fit of these models were compared. Regression coefficients (R...
Preservation and shelf-life extension of shrimps and clams by high hydrostatic pressure
BUYUKCAN, Mehmet; BOZOGLU, Faruk; Alpas, Hami (Wiley, 2009-08-01)
P>Clam (Venus gallina) and shrimp (Parapenaeus longirostris) samples were high hydrostatic pressure (HHP) treated at 200, 220 and 250 MPa at 25, 30, 40 and 50 degrees C for 10 and 20 min. Based on the results of microbial reduction, the best combinations of HHP treatments were determined as 250 MPa, 50 degrees C, 10 min for shrimps and 220 MPa, 50 degrees C, 10 min for clams. HHP-treated samples stored at 25 degrees C (room tempertur) and 4 degrees C (refrigeration temperature) were analysed. According to t...
Citation Formats
N. Erkan, H. Alpas, G. Uretener, A. Selcuk, and S. Buzrul, “Changes in the physicochemical properties of high pressure treated rainbow trout,” ARCHIV FUR LEBENSMITTELHYGIENE, pp. 183–188, 2010, Accessed: 00, 2020. [Online]. Available: