Beslenme ve Diyetetik Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/223

Browse

Now showing 1 - 4 of 4

Adsorption and inhibition effect of 2,4-diamino-6-hydroxypyrimidine for mild steel corrosion in HCl medium: experimental and theoretical investigation
(SPRINGER HEIDELBERG, 2019) Yildiz, Resit; Yıldız, Reşit
2,4-Diamino-6-hydroxypyrimidine (2D6H) was examined as corrosion inhibitor of mild steel (MS) in 0.1M HCl using potentiodynamic measurements, linear polarization resistance (LPR), scanning electron microscopy, electrochemical experiments, and quantum chemical calculations. All measurements show that the corrosion inhibition effectiveness is forthright compared to the concentration of 2D6H ranging from 0.5 to 10.0mM. Adsorption of 2D6H on the MS surface in the presence of HCl is determined to obey Langmuir adsorption isotherm. The electronic features elucidated by quantum chemical calculations were associated with the experimental inhibition productivities. The mechanism of inhibition was revealed by E-pzc measurements.
The effects of oxytocin on penile tissues in experimental priapism model in rats
(SPRINGER, 2019) Kolukçu, Engin; Kılıç, Şahin; Parlaktaş, Bekir Süha; Erdemir, Fikret; Ünsal, Velid; Atılgan, Doğan; Uluocak, Nihat
PurposeThis study aimed to demonstrate the effects of oxytocin on penile tissues in ischemia-reperfusion injury developed after priapism.MethodsForty Wistar Albino strain male rats were divided into four groups. The control group (n=10) was not intervened. In Group 2, a rat model of priapism was constructed and maintained for 1 h. In Group 3, reperfusion was ensured for 30min following priapism. Rats in Group 4 rats were given oxytocin 30min before the induction of reperfusion following priapism. All rats were penectomized, and adequate amounts of blood sample were drawn. Inflammation, vasocongestion, desquamation, and edema in penile tissue were scored between 0 and 3 points (0: normal, 1: mild, 2: moderate, 3: severe) to evaluate the severity of tissue damage. The activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and the levels of malondialdehyde (MDA), and nitric oxide (NO) in blood samples were determined spectrophotometrically.ResultsIn histopathological examination, statistically significant positive changes were detected in vasocongestion, inflammation, desquamation, and edema scores in Group 4 than in Group 2 and Group 3 (p<0.001). Biochemical test results revealed that NO levels were significantly lower in Group 4 than in Group 3 (p<0.001). Serum GSH-Px activities in Group 4 significantly increased when compared with the other groups 2 and 3 (p=0.002, p=0.001, respectively). There was no statistical difference among the groups regarding SOD activities and MDA levels (p>0.05).ConclusionsOxytocin protected against priapism-induced ischemia-reperfusion injury developed in cavernosal tissue as observed based on histopathological and biochemical evidence. Although this is an experimental study, oxytocin can be thought as an alternative drug in the treatment of priapism.
Seasonal Variations in the Fatty Acid Composition of Phospholipid and Triacylglycerol in Gonad and Liver of Mastacembelus simack
(SPRINGER, 2015) Kaçar, Semra; Başhan, Mehmet
The seasonal effects on the fatty acid composition of triacylglycerol (TG) and phospholipid (PL) in the gonad and liver of Mastacembelus simack were determined using the gas chromatographic method. The most abundant fatty acids in the investigated seasons and tissues were palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1n-9), palmitoleic acid (C16:1n-7), arachidonic acid (C20:4n-6), eicosapentaenoic acid (C20:5n-3), and docosahexaenoic acid (C22:6n-3). The distribution proportions of aSFA (saturated fatty acids), aMUFA (monounsaturated fatty acids) and aPUFA (polyunsaturated fatty acids) were found to be different among PL and TG fractions in all seasons. The total lipid content of gonad and liver were 1.32 (November)-4.90 % (September) and 1.32 (September)-3.94 % (January), respectively. It was shown that the total lipid and fatty acid compositions in the gonad and liver of fish were significantly influenced by seasons.
Seasonal variations in the fatty acid composition of phospholipids and triacylglycerols of brown trout
(WILEY-BLACKWELL, 2015) Kayhan, H.; Başhan, Mehmet; Kaçar, Semra
Seasonal variations on phospholipid (PL) and triacylglycerol (TG) fatty acid (FA) compositions in muscles of Salmo trutta macrostigma were investigated by gas chromatography (GC) using the method described by Folch. The total lipid of the muscle was extracted using chloroform/methanol (2: 1, v/v) and was separated into TG and PL using thin layer chromatography (TLC). A total of nineteen and sixteen different fatty acids were determined in TG and PL, respectively. The distributions of Sigma SFAs (saturated fatty acids), Sigma MUFAs (monounsaturated fatty acids) and Sigma PUFAs (polyunsaturated fatty acids) proportions were found to be different among PL and TG fractions in all seasons. TG contained a lower proportion of Sigma PUFA, but a higher proportion of Sigma MUFA and Sigma SFA than PL. The major components were palmitic acid (16: 0), oleic acid (18: 1 n-9), eicosapentaenoic acid (EPA, 20: 5 n-3) and docosahexaenoic acid (DHA, 22: 6 n-3) in PL, 16: 0, palmitoleic acid (16: 1 n-7), 18: 1 n-9, linoleic acid (LA, 18: 2 n-6), linolenic acid (ALA, 18: 3 n-3), 20: 5 n-3 and 22: 6 n-3 in TG extracted from muscle of S. trutta macrostigma in all seasons. The total lipid content varied seasonally from 1.44% to 1.90% in female muscle of wet weight for S. trutta macrostigma. N-3/n-6 ratios of PL and TG were found to be 5.19-12.0 and 1.09-2.62, respectively.

Browse

Browsing Beslenme ve Diyetetik Bölümü Koleksiyonu by Scopus Q "Q2"