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Öğe Synthesis, characterization and antioxidant activity of heterocyclic Schiff bases(Journal of the Chinese Chemical Society, 2020-08-04) Aral, Tarık; Dağ, Beşir; Kızılkaya, Hakan; Genç, Nusret; Erenler, RamazanSchiff base derivatives have gained great importance due to revealing a great number of biological properties. Schiff bases were synthesized by treatment of 4-amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (1) with various aldehydes in methanol at reflux. In addition, diamine was reacted with an aldehyde to yield the corresponding Schiff bases. The structures of synthesized Schiff bases were elucidated by spectroscopic methods such as microanalysis, 1 H-NMR, 13C-NMR, and FTIR. Antioxidant activities of synthesized Schiff bases were carried out using different antioxidant assays such as 1,1-diphenyl-2-picryl-hydrazyl free radical (DPPH• ) scavenging, 2,20 -azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging, and reducing power activity. (E)-4-((1H-indol-3-yl)methyleneamino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (3), (E)-1,5-dimethyl-4-((2-methyl-1H-indol-3-yl) methyleneamino)-2-phenyl-1H-pyrazol-3(2H)-one (5), (E)-1,5-dimethyl-2-phenyl-4-(thiophen-2-ylmethyleneamino)-1H-pyrazol-3(2H)-one (7), (E)-1,5-dimethyl2-phenyl-4-(quinolin-2-ylmethyleneamino)-1H-pyrazol-3(2H)-one (9), (1S,2S, N1,N2)-N1,N2-bis((1H-indol-3-yl)methylene)cyclohexane-1,2-diamine (11), and (1S,2S,N1,N2)-N1,N2-bis((2-methyl-1H-indol-3-yl)methylene)cyclohexane-1,2-diamine (12) were synthesized in high yields. Compound 5 displayed a good ABTS•+ activity. Compound 3 revealed the outstanding activity in all assays. Compound 7 has the best-reducing power ability in comparison to other synthesized compounds. Although compounds 5, 11, 12 are new, compounds 3, 7, 9 are known. Due to revealing a good antioxidant activity, the synthesized compounds (3, 5, 7) have the potential to be used as synthetic antioxidant agents.Öğe Effect of some total phenolic, antioxidants, physico-chemical properties, mineral and heavy metal content of apricots drying types(Batman Üniversitesi, 2016-12-28) Dağ, Beşir; Tarakçı, Zekai; Demirkol, MelikeKayısı bol miktarlarda A vitamini deposudur ve aynı zamanda demir, kalsiyum, fosfor ve bakır da dahil olmak üzere önemli miktarlarda mineral içermektedir. Kayısıyı incelediğimizde şekil olarak semiz, dolgun ve renk olarak turuncu ve altın sarısı olarak nitelendirilebilir. kayısının tamamen olgunlaşmış herhangi bir türü çok yumuşak olmasa da kolayca işlenebilir ve kuruma sırasında şeklini kaybedebilir. Kayısı numuneleri üç farklı kuru kayısı olarak analiz edildi bunlar; gün kurusu, islim ve taze kuru şeklinde sıralanır. Bu farklı kayısı numunelerinde, toplam fenolik madde, antioksidan, renk, kuru madde ve Ca, Mg, Na, Mn, Fe, Cu, Zn, Cr, Co Pb, Ni, Sn, Cd and Mo gibi bazı ağır metal ve mineral içeriklerinin tayini yapıldı. Kayısı numunelerinin renk değerleri,kuru madde değerleri kül tayini ve ağır metal ve mineral değerleri istatistiksel olarak incelendi. Kuru kayısı dünya çapında popular bir üründür.Öğe Synthesis and anticorrosion studies of 4-[(2-nitroacetophenonylidene)-amino]-antipyrine on SAE 1012 carbon steel in 15 wt.% HCl solution(Taylor & Francis, 2020-11-16) Gerengi, Hüsnü; Çakmak, Reşit; Dağ, Beşir; Solomon, M. M; Tüysüz Akbal, Hatice Aslıhan; Kaya, ErtuğrulA novel corrosion inhibitor, ((E)-1,5-dimethyl-4-((1-(3-nitrophenyl)ethylidene)amino)-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) (DNPP) was synthesized in high yield by the condensation reaction of 4-aminoantipyrine with 2-nitroacetphenone derived from acetophenone as a starting material and characterized by FT-IR, 1H, and 13C NMR techniques. DNPP was tested against the corrosion of SAE 1012 carbon steel in 15 wt.% HCl solution using electrochemical and surface characterization techniques. Results obtained show that DNPP is effective in retarding the corrosion of SAE 1012 carbon steel. With 4 mM of DNPP, the charge transfer resistance of SAE 1012 in 15 wt.% HCl solution is raised from 17.42 to 140.50 Ω cm2 and the substrate surface is protected by 87%. The inhibition is through adsorption mechanism (mixed-adsorption type) and has been confirmed by SEM and EDAX results. Potentiodynamic polarization results reveal that DNPP acted as a mixed-type corrosion inhibitor. DNPP is a promising candidate for the formulation of an inhibitor cocktail for the strong acid environment.Öğe Mineral and heavy metal by inductively coupled plasma optical emission spectrometer in traditional Turkish yogurts(Academic Journals, 2013-05-23) Tarakçı, Zekai; Dağ, BeşirYogurt, a traditional Turkish dairy product is common in all region of Turkey. The different heavy metals were determined in commercial yogurts by inductively coupled plasma optical emission spectrometer (ICP–OES). Concentrations of calcium (Ca), phosphorus (P), sodium (Na), magnesium (Mg), aluminum (Al), zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), boron (B), molybdenum (Mo), cadmium (Cd), cobalt (Co), chromium (Cr), nickel (Ni) and lead (Pb) were measured by ICP–OES; Varian Vista-Pro, Mulgrave, Victoria, Australia. Traditional Ordu yogurts generally have means of 1126.0 mg/kg Ca, 983.1 mg/kg P, 585.3 mg/kg Na, 112.4 mg/kg Mg, 1.73 mg/kg Fe, 0.71 mg/kg Cu, 4.51 mg/kg Zn, 0.0027 mg/kg Co, 0.017 mg/kg Cr, 18.11 mg/kg Al, 0.69 mg/kg B, 0.86 mg/kg Mn, 0.41 mg/kg Mo, 0.05 mg/kg Ni, 0.055 mg/kg Pb and 0.002 mg/kg Cd.Öğe Investigation of some properties of chestnut honey produced in Black Sea Region of Turkey(Batman Üniversitesi, 2017) Dağ, Beşir; Sıralı, Recep; Tarakçı, ZekaiThe aim of the present study was to characterize the physical and biochemical properties of black sea region chestnut honey samples. Physiochemical parameters, such as moisture content, water-insoluble substance, free acidity, diastase activity, fructose/Glucose ration, total fructose+glucose; sucrose and hydroxymethylfurfural (HMF) content were measured. The moisture content 18.13±1.53 %, water-insoluble substance full samples values 0.00 %, free acidity 20.78±2.44 meq/kg, diastase activity 14.20±2.87, fructose/glucose ration 1.44±0.05, total fructose+glucose 71.15±2.26 %, sucrose content 2.00±0.56 % and HMF content 0.57±0.09 mg/kg were founded.Öğe Determination of Cu contamination in some spring and mineral waters around van by AAS after enrichment of activated carbon(Medwell, 2011) Dağ, Beşir; Kılıçel, FevziSome trace metal contamination in water is a major component in the determination of water quality. In order to supply qualify water for health of human being, terrestiral and aquatic animals is very important. Apparently, tap water and spring water qualities in many countries are effected by industrilization and over population. The main aim of this study was to detect copper metal concentration in some spring and mineral water around Van by means of Atomic Absorption Spectrometer after enrichment of activated carbon. Spring and mineral water samples were collected some different parts of city. These mineral and spring water samples were determined by a simple preconcentration method which is called activated carbon enrichment. The metal analysis was done to detect copper element. It was compared the results with standarts for drinking water quality of World Health Organization (WHO) and Europian Union drinking water standarts. As a result, copper level in the spring and mineral water around Van were generally suitable for the both criterias of World Health Organization (WHO) and Europian Union drinking water.Öğe Determination of flouride ions in resource and mineral waters of the Van region by using ion-selective electrode method(Scientific & Academic Publishing, 2014) Dağ, Beşir; Kılıçel, FevziFactors that have a significant negative effect of ecological research on species alive, especially human beings are very important. A most important danger for environment is called pollution that threaten human beings and nature since it is seen at the start of the second half of the twentieth century, due to technological development and a great increasing the population. As a result, toxic wastes accumulate continuously in the rivers, lakes and seas, cross-contamination of water leads to an important extent. Some of the water and soil with toxic and carcinogenic elements, concentrations exceed certain forms of pollution. Toxic and carcinogenic elements in waters and soils in any region, whether or not pollution, with research is exposed. With different ways some elements (Pb, Ni, Cd, As and Bi) reach to organisms, the body exhibit a direct toxic effect. Even though some of the elements (Cu, Mn, Zn, Co and Se, etc.) are the nutrients, increasing concentrations of these substances show a toxic effect [1]. The amount of fluoride in water is 1.0 mg/L as useful, as it is expressed on the concentrations of toxic and carcinogenic [2]. Because of the importance mentioned above, the source and the mineral waters of the Van region, the water samples were collected from 30 centers in 4 seasons. After some preparatory phase for the measurement of fluoride ion, the water samples were prepared. Examples were analyzed with ion-selective electrode method [3]. The values were compared with the standard values. The values in the samples vary according to the collection centers. Generally, the values are in the range of standard values. Fluoride in 2 samples taken from the centers of 9 and 17 has been found to exceed the standard.Öğe 238U and total radioactivity in drinking waters in Van province, Turkey(Taylor & Francis, 2014-04) Selçuk Zorer, Özlem; Dağ, BeşirAs part of the national survey to evaluate natural radioactivity in the environment, concentration levels of total radioactivity and natural uranium have been analysed in drinking water samples. A survey to study natural radioactivity in drinking waters was carried out in the Van province, East Turkey. Twenty-three samples of drinking water were collected in the Van province and analysed for total α, total β and 238U activity. The total α and total β activities were counted by using the α/β counter of the multi-detector low background system (PIC MPC-9604), and the 238U concentrations were determined by inductively coupled plasma-mass spectrometry (Thermo Scientific Element 2). The samples were categorised according to origin: tap, spring or mineral supply. The activity concentrations for total α were found to range from 0.002 to 0.030 Bq L−1 and for total β from 0.023 to 1.351 Bq L−1. Uranium concentrations ranging from 0.562 to 14.710 μg L−1 were observed in drinking waters. Following the World Health Organisation rules, all investigated waters can be used as drinking water.Öğe Some physicochemical properties and mineral contents of stirred yoghurts containing different fruit marmalades(Wiley-Blackwell, 2018-02-01) Temiz, Hasan; Tarakçı, Zekai; Yarılgaç, Tarık; Dağ, BeşirIn this study chemical properties and mineral levels of yoghurts containing different fruit marmalades were investigated. Cherry laurel, loquat fruit and kiwi marmalade were used to make the stirred yoghurts, and the calcium, phosphorus, sodium, magnesium, manganese, iron, zinc, copper, boron, lead, nickel, molybdenum, chromium, cadmium, cobalt levels were determined by an inductively coupled plasma optical emission spectrometer (ICP–OES). The total solid, fat, ash, pH, viscosity and syneresis contents of the yoghurt samples changed between 13.85–21.02%, 2.45–2.90%, 0.82–0.94%, 4.11–4.22, 2104–2454 cP and 42.0–47.0 mL/100 g, respectively. The mean concentrations in the yoghurts of these minerals were 104.66–118.94 calcium, 95.81–112.42 phosphorus and 13.47–15.04 magnesium as mg/100 g, 235.00–254.00 iron, 429.00–453.00 zinc and 70.45–122.90 copper as μg/100 g. The recommended dietary allowance (RDA) was calculated on the basis of the intake of one yoghurt portion (125 g).
