Yazar "Ucyol, Nail" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • [ X ]
    Öğe
    An application on fish bones by chemical modification of histidine as amino acid
    (Adem Yavuz SÖNMEZ, 2015) Kizilkaya, Bayram; Ormanci, Hasan Basri; Oztekin, Alkan; Tan, Evren; Ucyol, Nail; Turker, Gulen; Tekinay, Ahmet Adem
    In this study, fish bones as a waste in fish processing was investigated whether they could be used as multi-functional materials by chemical modification. Histidine was used and modified on the surface of bone particle by esterification method. The reaction was carried out in water. The results showed that the surface modification of bone particles was performed successfully. Histidine bonded on the surface of bone was calculated as 110.83 µmol/g. The point of zero charge (PZC) of bone apatite (H) and modified bone (HA4) was investigated and determined as 7.25 and 6.98, respectively. SEM-EDX spectrums showed that nitrogen element of histidine on the surface of HA4 could be observed in EDS spectrum clearly. According to EDS spectrum analysis, nitrogen amount of HA4 which was formed to the one of histidine composition was detected as 16.2 %., nitrogen amount of Hand HA5 was detected as 8.037% and 8.565 %, respectively.
  • [ X ]
    Öğe
    Investigation and Comparison of the Suitability and Usability of Fatty Acids and the Lipid Quality Index Parameters in Waste Skin and Bones of Some Cultured Fish
    (Arman Darya Inc, 2022) Kizilkaya, Bayram; Ucyol, Nail
    In this study, the suitability and usability of fish skin and bones generated as waste in terms of lipids and fatty acids were investigated. In this paper, the cultured Sparus aurata (Sea bream), Dicentrarchus labrax (Sea Bass) and Oncorhynchus mykiss (Rainbow trout) fish were examined. Within the scope of the study, the fatty acids and lipid quality index parameters in the skin and bones of the cultured fish were calculated. The lipid quality index was examined for skin and bone of cultured fish using the Atherogenicity Index (AI), Thrombogenicity Index (TI), Flesh-lipid quality (FLQ), Hypocholesterolemic/hypercholesterolemic ratio (h/H), Health-promoting index (HPI), Unsaturation Index (UI), The polyene index (PI), Hypercholesterolaemic fatty acids (OFA), and Desirable fatty acids (DFA). Among these indices, the AI values were obtained between 0.18 and 0.24 in all fish bone and skins The TI values also obtained between 0.71 and 0.98 for all bone and skins. Among the important fatty acids, EPA was calculated between 0,34 and 2.22g/100g in skins and 0.29 and 0.87g/100g in bones. According to our results, it has been determined that the fatty acids levels of ?-3, ?-6, and Linoleic acid (LA) in fish skin and bones based on 100g of dry weight composition (DWC) are higher than the daily consumption levels recommended by The Australian National Health and Medical Research Council (NHMRC). In conclusion, it can be said that the skin and bones of cultured fish can be used for dietary consumption purposes.
  • [ X ]
    Öğe
    Nutritional quality of amino acid in farmed, farm-aggregated and wild Axillary seabream (Pagellus acarne) with implications to Human Health
    (Wiley, 2020) Öztekin, Alkan; Yigit, Murat; Kizilkaya, Bayram; Ucyol, Nail; Tan, Evren; Yılmaz, Sevdan; Bulut, Musa
    This study evaluated the nutritional quality of farmed and wild axillary seabream (Pagellus acarne R., 1827) focusing on amino acid profiles, with regards to possible interactions with wild fish aggregating around the cage facility. Total amino acids ( n-ary sumation AA), essential amino acids ( n-ary sumation EAA), non-essential amino acids ( n-ary sumation NEAA) and neutral amino acids ( n-ary sumation NAA) in farmed fish were lower than those in the wild individuals (p > .05). Amino acid pattern in cage-aggregated fish showed a slight decline from the wild populations, but still higher than the farmed fish. Based on the amino acid scores (AAS), lysine and leucine could be underlined as the 'first limiting amino acids', but all other AASs were over '1', in accordance with reference amino acid contents of FAO/WHO (>1.00), showing that farmed axillary seabream provides high nutritional quality and can be considered as a favourable protein source. The ratios of n-ary sumation EAA/ n-ary sumation AA (44%-46%) and n-ary sumation EAA/ n-ary sumation NEAA (79%-86%) exceeded the minimum recommendation of 40% and >60% by FAO/WHO for all three groups. It can be concluded that axillary seabream either farmed, farm-aggregated or distant wild fish presented high-quality protein generating a healthy source for human food.
  • [ X ]
    Öğe
    Surface modification with P-aminohippuric acid on biogenic apatite (fish bones) particles
    (Adem Yavuz SÖNMEZ, 2014) Tan, Evren; Kizilkaya, Bayram; Ucyol, Nail; Ormanci, Hasan Basri; Oral, Ayhan
    The aim of this study with fish bones as a waste in fish processing is to investigate whether they can provide more efficient and multi-functional materials by chemical modification. As modification chemical, p-aminohippuric acid was selected and modified on the bone particle surface by esterification method. The results showed that surface modification was performed successfully. P-aminohippuric acid bonded on the surface of bone was calculated as 190.64 µmol/g. The point of zero charge (PZC) of bone apatite (H) and modified bone (HA5) was investigated and determined as 7.25 and 6.80, respectively. SEM-EDS spectrums showed that nitrogen element of p-aminohippuric acid on the surface of HA5 could be observed in EDS spectrum clearly. Additionally, nitrogen amount of Hand HA5 was detected as 8.037% and 8.565%, respectively.