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    Determination of Quality Changes on Anchovy (Engraulis encrasicolus L., 1758) Dried with Natural and Mechanical Methods and Packaged in Various Forms
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2021) Yavuz, Fatih; Erdem, Mehmet; Kostekli, Bayram; Keskin, Irfan; Eyuboglu, Asiye
    In study, anchovies were dried with natural and mechanical methods and were packaged by stretch and vacuum methods. In order to determine the quality changes and shelf-life of the fish that were stored in refrigerator (4 +/- 1 degrees C); chemical, microbiologic and sensorial analysis were performed. Due to the drying of fish meat, a sudden increase was observed in TBA and TVB-N analysis and it was determined that this increase continues throughout the shelf life of all groups. Due to the very low water activity, the number of microorganisms remained below the detectable limit (10 CFU g) throughout the study. When the microbiologic data was examined, coliform bacteria were not found throughout the research. According to the sensory analysis, the shelf life of anchovy fish was determined as 2.5 months by drying naturally and the shelf life of the anchovy fish was extended 2 months through mechanical drying. In the present study, it was detected that vacuum packaging cause hydration over time and some spoiling in their texture.
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    Determination of the shelf life of smoked sea bass (Dicentrarchus labrax linaeus, 1758) marinade stored under refrigerated conditions (4 °C)
    (Natl Univ Food Technologies, 2019) Keskin, Irfan; Kostekli, Bayram; Eyuboglu, Asiye; Kaya, Yalcin
    Introduction. In this study, two different marinade (plain and smoked) were prepared with seabass and determination of their shelf-life was aimed by investigating the quality according to organoleptic, chemical and microbiological parameters. Material and methods. Fishes supplied from an aquaculture facility were brought to the laboratory under cold storage and filleted after cleaning process. First group (Group A: Plain) was put into the marination solution (Fish: solution ratio was 1:2, 1.68% alcohol vinegar, 6.4% salt and 0.01% citric acid) for 5 days. In second group (Group B: Smoked) fish were smoked and air cooled to the ambient temperature. Cold fish fillets were waited in the marination solution (Fish: solution ratio was 1:2, 1.2% alcohol vinegar, 5.5% salt and 0.01% citric acid) for 2 days. Result and discussion. According to the results in terms of the chemical analyses, while TBA value was determined as 0,26 +/- 0,01 mgMDA/kg in raw material, at the end of the study this value was determined as 4,38 +/- 0,05 mgMDA/kg in Group A (5th month) and 3,05 +/- 0,02 mgMDA/kg in Group B (7th month). According to results in terms of the microbiological analyses, TMAB count was determined as 2,00 +/- 0,04 CFU/g in raw material but total bacteria and yeast-mold count was remained <10 CFU/g during the storage period. Coliform bacteria were not encountered in the study. For the organoleptic analyses 5 experienced panelists evaluated the products according to colour, odour, texture, flavour and general appreciation. Both groups got high scores in the beginning but Group A got low scores in 5th month and Group B had low scores in 7th month from panelists and lost quality. Conclusion. As a result, smoked sea bass marinade was appreciated more than plain sea bass marinade and the shelf life of smoked marinade was detected higher than the plain marinade.
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    Macro and Micro Element Composition of Smoked and Marinated Shrimps (Parapenaeus longirostris): Its Potential Impact on Consumer Health
    (Tokat Gaziosmanpasa University, 2022) Kocatepe, Demet; Eyuboglu, Asiye
    The aim of this study is to determine the effect of smoking and marination process on mineral concentration of shrimp meat. The samples obtained from the Tuzla Region of the Marmara Sea were first smoked and then marinated after the pre-treatment. Mineral analysis was carried out in ICP-MS after microwave wet digestion process on both the shrimps immersed in boiling water after caught (group A), smoked (group B) and marinated shrimps after smoking (group C). According to the results of the study, the macro element concentration after smoking process (group B) was found to be higher than the other groups. Changes were observed in the microelement and heavy metal content of the shrimps because of smoking and marination process. Heavy metal concentrations of the groups were below the limits recommended by international organizations. The Hazard Quotient (HQ) of the groups was below the limit value of 1 and therefore all groups can be said to be safe for human consumption.
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    The effect of different application methods of sumac (Rhus coriaria) and tarragon (Artemisia dracunculus) on nutritional composition, fatty acids and TBARS values of marinated sea bream (Sparus aurata L., 1758)
    (Wiley, 2021) Corapci, Bengunur; Kostekli, Bayram; Eyuboglu, Asiye; Kocatepe, Demet
    In this study, different application methods (Spice, Brew, Infused Oil) were employed using sumac (Rhus coriaria) and tarragon (Artemisia dracunculus) spices and some effects on marinated sea bream were investigated during 180 days of experiment at +4 degrees C. The nutrition composition of the samples, TBARS values, fatty acid values of the oils, and the fatty acid values of the samples on days 0, 15, and 180 were determined. It can be said that the nutritional composition was minimally affected by different application methods. On the last day of storage, TBARS values of the groups were as follows: BS > C>BT > SIO > ST > SS > TIO. No statistically significant difference was observed in the fatty acids results of olive oil, sumac infused oil, and tarragon infused oil obtained by soaking in olive oil (p > .05). TBARS values of all the groups showed strong positive correlation with SFA, MUFA, and PUFA. PUFAs were the predominant fatty acids, followed by MUFAs and SFAs. Practical applications It is important to preserve the quality of oils and fatty acids in the preservation of seafood. It is thought that two antioxidants, sumac and tarragon, can be effective on fatty acids. In this study, different application methods have been tried in marinated sea bream and it has been investigated in which method sumac and tarragon spice provide better preservation on nutritional value and fatty acid composition.
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    The effect of different application methods of sumac (Rhus coriaria) and tarragon (Artemisia dracunculus) on some quality properties of marinated sea bream (Sparus aurata L., 1758)
    (Wiley, 2020) Corapci, Bengunur; Kostekli, Bayram; Eyuboglu, Asiye; Kocatepe, Demet
    In this study, different application methods (Spice, Brew, and Infused Oil) were employed using sumac (Rhus coriaria) and tarragon (Artemisia dracunculus) spices and chemical, sensory, physical, and microbiological quality values of marinated sea bream (Sparus aurata L., 1758) were investigated during 180 days of the experiment at +4 +/- 1 degrees C. TVB-N, pH, water activity, NaCl and acidity values, color measurement, and sensory and microbiological analysis were determined in the samples. All groups were within the limits of consumable in terms of TVB-N values during the storage period. According to the sensory analysis results in the present study, the group that was most liked by the panelists was determined as the spice tarragon (ST) group. Microbiological analysis results show that the antimicrobial effect of the brewing method is lower than other methods and sumac was the more suitable spice for marinated sea bream in terms of microbiological and sensorial analysis results. Practical applications Most consumers have a negative view of synthetic preservatives used in food products. Sumac and tarragon plants are among the spice types that have come to fore both in terms of antioxidants and antimicrobials. In this study, different application methods have been tried in marinated sea bream and it has been investigated in which method sumac and tarragon spice provide better preservation and shelf life.
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    THE NEW GASTRONOMIC PRODUCT: DRIED AND VACUUMED RAINBOW TROUT ROE
    (Galati Univ Press, 2021) Turan, Hulya; Corapci, Bengunur; Keskin, Irfan; Kostekli, Bayram; Eyuboglu, Asiye; Altan, Can Okan; Kocatepe, Demet
    In this study, it was aimed to investigate that the effect of drying process on rainbow trout (Oncorhynchus mykiss Walbaum, 1792) roes in terms of the proximate composition, aw, pH, TVB-N, TBARs, microbiological counts and color parameters. Drying was lasted 42 hours including, 18 hours at 30oC and 24 hours at 45oC. The dried fish roes were vacuum-packed (vacuum degree 0.02MPa) and stored at 4oC for 90th days. The crude lipid, crude protein, crude ash and moisture contents of fresh fish roe was 6.67%, 18.51%, 2,67%, and 71.99%, respectively. No change detected in terms of aw value in vacuum packed dried eggs between the first and 90 days (p 0.05). While the pH value of the fresh roe decreased with pretreatments and drying, TVB-N and TBARs value increased. At the end of the storage period, TVB-N value reached to 42.57mgN / 100g. The total mesophilic aerobe bacteria count of dried roes did not exceed the limit value at the end of the storage period. Total anaerobe mesophilic bacteria, Total Coliform, E. coli, H2S producing bacteria (including S. putrefaciens) and Lactic acid bacteria counts of fresh and vacuumed dried roes were below detectable limit values (<0.30 LogCFU/g). In conclusion, it has been determined that vacuum-packed dried rainbow trout roes can be safely consumed for 60 days at +/- 4 degrees C.