Yazar "Tarhan, Duygu" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    DETERMINATION OF SOME ELEMENTS (Cr, Cu, Fe, Mg, Mn, Se, Zn, Al, Cd, Pb) IN COMMERCIALLY -AVAILABLE FISH OIL SUPPLEMENTS BY INDUCTIVELY COUPLED PLASMAOPTICAL EMISSION SPECTROSCOPY
    (Parlar Scientific Publications (P S P), 2020) Aksu, Filiz; Tarhan, Duygu; Sandıkçı Altunatmaz, Sema; Pastacı Özsobacı, Nural; Ercan, Alev Meltem; Yıkmış, Seydi; Aksu, Harun
    Metals are essential (Cr, Cu, Fe, Mg, Mn, Se, Zn) and non-essential (Al, Cd, Pb) elements for metabolism. These elements can be found naturally in the marine environment and aquaculture grown in this environment, and their amounts can increase with the effects of environmental contamination. Fish oil is an important supplement produced from fish liver and muscles. In this study, the amounts of 10 different elements in fish oil offered for sale in Turkey (Cr, Cu, Fe, Mg, Mn, S, Zn, Al, Cd, Pb) were determined. A total of 40 fish oils were used in the study. Total element content was determined using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The minimum, maximum and average values, respectively, of the samples analyzed in lag/g were; Cr: (0.300; 5.550; 0.896 +/- 0.156); Cu: (0.075; 17.175; 3.976 +/- 0.768); Fe: (4.580; 69.900; 17.125 +/- 2.330); Mg: (2.395; 233.450; 24.874 +/- 6.083); Mn: (0.040; 1.325; 0.184 +/- 0.046); Se: (0.380; 6.460; 1.369 +/- 0.166); Zn: (0.025; 513.500; 52.550 +/- 22.003); Al: (0.510; 9.800; 3.353 +/- 0.451); Cd: (0.005; 0.070; 0.024 +/- 0.002); Pb: (0.0; 0.230; 0.074 +/- 0.010). In the fish oils, Zn and Mg were found to be the most abundant elements among the analyzed elements. It was found that the fish oil supplements analyzed did not exceed the limits specified for Food Supplements in Turkish Food Codex Contaminant Regulations in terms of Cd and Pb heavy metals.
  • Küçük Resim
    Öğe
    Relationships Linking the Element, Bioactive, Hydroxymethylfurfural, Color of Kars Honeys: a Chemometric Approach
    (Springernature, 2022) Aksoy, Aksem; Tarhan, Duygu; Yıkmış, Seydi; Ercan, Alev Meltem; Altunatmaz, Sema Sandıkçı; Aksu, Filiz; Or, Mehmet Erman
    Honey is a natural food substance considered among functional foods due to its positive effect on human health. Quality of honey is significantly influenced by environmental conditions and botanical origin. This study aimed to determine the element content in honey from Kars, Turkey, as well as the bioactive compounds and certain physicochemical and biochemical properties such as hydroxymethylfurfural (HMF) and color in a chemometric approach. In this study, a total of 41 local honey samples were analyzed. The levels of elements Al, As, B, Cd, Cr, Cu, Fe, Mg, Zn, and Pb were determined by inductively coupled plasma optical emission spectrophotometer (ICP-OES). The mean concentrations of the elements in the samples were identified as 3.09, 0.64, 59.07, 0.02, 0.14, 0.17, 1.76, 9.32, 0.78, and 0.33 mu g/g for Al, As, B, Cd, Cr, Cu, Fe, Mg, Zn, and Pb, respectively. The mean bioactive compounds of the honey samples were determined as phenolic content (19.74 mg GAE/100 g), flavonoid content (4.47 mg CE/100 mg), and DPPH (49.08% inhibition). The HMF levels of all samples conformed to the honey standards of the Codex Alimentarius and Turkish Food Codex. HMF was not negatively correlated with the other color parameters except for the a* (redness or greenness) value. This study showed that clustering analysis (CA) and principal component analysis (PCA) are useful for distinguishing the originality of honey samples by using element content, bioactive properties, HMF, and color and were useful in defining the Kars honey type.