Bu çalışmada farklı markalardan oluşan kahvaltılık margarinler (K1, K2, K3, K4 ve K5) ve mutfak margarinleri (M1, M2, M3, M4 ve M5), 4 ve 25°C sıcaklıklarda 12 hafta süreyle depolanmıştır. Depolama süresince her 2 haftada bir numune alınarak, tokoferol içeriği, peroksit sayısı (PS), tiyobarbütirik asit sayısı (TBA), konjuge-dien (K232) ve yağ asidi bileşimlerinde meydana gelen değişimler tespit edilerek, margarinlerin oksidatif stabiliteleri değerlendirilmiştir. Çalışmada kullanılan margarin örneklerinde başlangıçta belirlenen değerlerin etiket değerleri ile uyumlu olduğu, ancak depolama sıcaklığı ve süresine bağlı olarak değiştiği tespit edilmiştir. En yüksek PS’ları kahvaltılık margarinlerde 4°C’de depolanan K3 örneğinde (11.08 meqO2/kg) ve 25°C’de depolananlardan K4 örneğinde (70.97 meqO2/kg) belirlenirken, mutfak margarinlerinde ise 4°C’de depolanan M2 margarininde (9.22 meqO2/kg) ve 25°C’de depolanan M1 margarininde (27.63 meqO2/kg) tespit edilmiştir. 4 °C’de depolanan K3 margarini dışındaki margarinlerde PS’ları yasal limit içinde kalmıştır. 25°C’de depolananlarda ise genel olarak kahvaltılık margarinler 2. haftadan sonra, mutfak margarinleri ise 4. haftadan sonra yasal limiti aşmıştır. K232 ve TBA değerleri depolama sıcaklığına bağlı olarak artış göstermiştir. Bu artış 25°C’de ve kahvaltılık margarinlerde daha yüksek düzeyde gerçekleşmiştir. Tokoferol içerikleri margarinlerde farklılık gösterirken sıcaklık ve süre artışına bağlı olarak azalmıştır. Margarinlerde depolama sıcaklığı ve süresi arttıkça, toplam doymuş yağ asidi içeriği artarken, toplam doymamış yağ asidi içerikleri düşmüştür. Mutfak margarinleri yüksek doymuş yağ asidi içeriklerinden dolayı kahvaltılık margarinlere göre daha yüksek oksidatif stabilite göstermiştir. Margarinler için 4°C’de depolamanın uygun olduğu, 25°C’de depolamada ise ilk haftadan itibaren bozulmaların başladığı görülmüştür.
Fish skin is one of the most common resources of gelatin, which can be hydrolyzed bioactive peptides. In this study, gelatin from sea bass skin (SBS) was hydrolyzed with flavourzyme® to obtain peptide fractions with different molecular weights and determined their bioactive and functional properties. All peptide fractions obtained showed antioxidant activity (DPPH and FRAP). The bass gelatin peptide fraction 1 (BF1) (≤5 kDa) showed the highest DPPH (44.9%) and FRAP (42.04 mmol Fe+2 /g and 22.98 mmol trolox/g) activities. Besides, the BF1 (≤5 kDa) peptide fraction showed the highest in vitro cytotoxic effect (16.58%) at 20 mg/mL concentration compared to the other peptide fractions. The highest emulsifying capacity (389.5 m2/g), emulsifying stability (53.2 min), foaming capacity (30.47%), and foaming stability (10.40%) were obtained from the control gelatin sample. Moreover, the BF3 (≥10 kDa) peptide fraction showed an excellent fat binding capacity (9.39 mL/g). Enzymatic hydrolysis decreased emulsifying and foaming capacity of gelatin while increasing its fat binding capacity. In particular, antioxidant and anticancer activities of peptide fractions with low molecular weight were found to be high. The results demonstrated that gelatin and hydrolysates from the SBS offer an important alternative as a functional food ingredient for food technology.
Objectives: It is a known fact that cancer is one of the biggest health problems. There are many different alternative products that are preferred for use among cancer patients. Our study is based on shark cartilage and liver oil as alternative products within alternative treatment (CAM) due to low incidence of cancer in sharks. Method: With this study; it was aimed to search the toxic effects of DMH on colon, SC and SLO ‘s conservative effects against these toxic and carcinogic effects. 40 rats have been classified as follows: 40 DMH group: 4; control group – 6; given DMH but not cured group – 15; given DMH and cured with SC group – 15; given DMH and cured with SLO group. Results and Conclusion: The negative effects of DMH on biochemical, genetic, and pathological were observed in rat column; The treatment of SLO and SC against to colon cancer is thought to be associated with damage and regression of tumor cells. When we look at the numerical results, it can be said that SC is more successful and effective in correcting the effect of DMH. It can be said that our experimental model provides the desired aim and success in this direction.
The aim of this study was to determine the physicochemical properties, bioactive substance content, and microbiological quality of sixty different honey samples collected from twelve different regions of Bayburt, Turkey. The samples were analyzed for their sugar, moisture, total phenolic, total flavonoid contents, and water activity, conductivity, pH values and colour, antiradical activity, and DSC properties. As a result of physicochemical analyses, it was determined that the samples examined complied with the standard values defined in the Turkish Food Codex in terms of the parameters examined. The results of the study showed that the total phenolic content (219.43-768.82 mg GAE kg−1) , total flavonoid content (31.29-118.7 mg CAE kg−1) and DPPH (12.98%-94.79%) parameters differ widely among the honey samples. A principal component analysis (PCA) was applied to correlate the characteristics of honey with honey samples collected from different regions. This is the first comprehensive and original report about the physicochemical properties of honey produced in Bayburt, a region close to the Anzer region where the most expensive honey, Anzer honey, is produced.
In this work, a rapid FTIR-ATR spectroscopic method combined with chemometrics was developed to predict royal jelly content in hive products; namely, dietary supplements such as royal jelly, propolis, honey and pollen. FTIR spectra of royal jelly, propolis, honey and pollen as well as their mixtures and dietary supplements were characterized. Amide II spectral absorption band with a peak point around 1547 cm−1 in the spectral range 1580–1500 cm−1 was used for quantitative estimation based on the calibration method using Partial Least Squares Regression (PLSR) and principal component regression (PCR) analyses. The results from the developed FTIR technique were also validated by those from HPLC-PDA technique, revealing a good correlation between FTIR and HPLC results (R2 = 0.99). The results of the present study suggest that the developed FTIR spectroscopy technique can be used to rapidly, easily and accurately predict the royal jelly content in the hive products.
Phenolic compounds from olive mill wastewater (PCO) of Algerian origin were used to produce sodium alginate-based active films using the casting method. The effects of adding various concentrations of PCO (0%, 0.1%, and 0.2% w/v) were evaluated regarding the molecular, morphological, thermal, physicochemical, optical, barrier, biodegradability, antimicrobial, and antioxidant properties of the alginate films. The FTIR and SEM results elucidated the development of a coherent cross-linked structure attributed to hydrogen bonding interactions between PCO and alginate chains. Consequently, the films exhibited enhanced crystallinity and thermal stability, as revealed by DSC analysis. Moreover, PCO addition positively influenced several film properties, including color attributes. As the PCO concentration increased from 0% to 0.2%, significant improvements were observed in tensile strength, thickness, phenolic content, and opacity, with maximum values reaching 19.666 MPa, 0.107 mm, 80.264 µg/g, and 0.869, respectively. Additionally, the water barrier capacity and oxidative stability of sunflower oil improved significantly, with the lowest values of 0.009 kg cm m− 2 kPa− 1d− 1 and 8.94 meq/Kg observed at a 0.2% PCO concentration. On the other hand, the film exhibited biodegradability, as evidenced by water resistance tests. The results showed that sodium alginate film coating containing PCO exhibited good anti-foodborne pathogen capacities against E. coli, L. monocytogenes, and Salmonella enterica with an inhibition zone between 14.6 and 19.6 mm, as well as a significant enhancement of antioxidant properties (79.506–98.682%) was observed. In conclusion, sodium alginate-based active films incorporated with PCO have demonstrated intriguing properties, making them suitable for food packaging.
