Fen - Edebiyat Fakültesi, Kimya Bölümü, Makale Koleksiyonu

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https://hdl.handle.net/20.500.12402/930

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Archaeometric review of the tile decorations in Hasankeyf Zeynel Bey Tomb with P-EDXRF
(Batman Üniversitesi, 2022-12-31) Turan, Emine; Levent, Abdulkadir
Tile is known as a handicraft based on the production of items such as vases, jugs and pots by shaping the soil after cooking. It is defined as the covering material processed with colorful décor and motifs used in the decoration of items such as tiles, ceramics, porcelain plates and china making in the goods processed with the help of this material. In this study, 7 Light Blue Glaze, 7 Navy Blue Glaze and 8 Unglazed Tile belonging to Zeynel Bey Tomb, a total of 22 tiles were analyzed in Hasankeyf Cultural Park where the tomb was moved with P-EDXRF. As a result; The chemical contents of the 22 samples we examined on site were determined and compared with the previous studies. It was determined that the results obtained were compatible.
Sulu çözeltiden alizarin sarısı boyarmaddesinin nanoadsorbent (MNPs-G1-Mu) vasıtasıyla adsorpsiyon özelliklerinin belirlenmesi
(Batman Üniversitesi, 2021-06-30) Ekinci, Selma; İlter, Zülfiye
Bu çalışmada Alizarin Sarısı boyarmaddesinin sulu çözeltiden adsorpsiyon yöntemiyle uzaklaştırılması amaçlanmıştır. Adsorpsiyon işleminde adsorbent olarak bir nano materyal olan MNPs-G1-Mu kullanılmıştır. Temas süresi, pH, başlangıç boyarmadde konsantrasyonu ve adsorbent miktarının adsorpsiyona etkileri incelenmiş olup, bu adsorpsiyon işlemi için uygun koşullar belirlenmiştir. Daha sonra adsorpsiyon kinetiğinin araştırılması için kinetik veriler kinetik denklemlerde (Pseudo Birinci Derece Kinetik Denklemi ve Pseudo İkinci Derece Kinetik Denklemi) değerlendirilmiştir. Adsorpsiyonun her iki kinetik denkleme de uyduğu belirlenmiştir. Son olarak, MNPs-G1-Mu ile Alizarin Sarısı boyarmaddesinin adsorpsiyonuna ait izoterm çalışması yapılarak, deneysel verilerin Langmuir ve Freundlich adsorpsiyon izotermlerine uygunluk gösterdiği belirlenmiştir. Bu izotermlerden faydalanılarak Langmuir sabiti (qm) ve b ile Freundlich sabitleri k ve n hesaplanmıştır. Sonuç olarak, MNPs-G1-Mu adsorbentinin Alizarin Sarısı boyarmaddesini %90,43 verimle adsorpladığı belirlenmiştir.
Mineral and heavy metal by inductively coupled plasma optical emission spectrometer in traditional Turkish yogurts
(Academic Journals, 2013-05-23) Tarakçı, Zekai; Dağ, Beşir
Yogurt, 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.
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, Fevzi
Factors 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.
Determination of Cu contamination in some spring and mineral waters around van by AAS after enrichment of activated carbon
(Medwell, 2011) Dağ, Beşir; Kılıçel, Fevzi
Some 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.
Influence of yogurt adding on physicochemical and sensorial properties of some lettuce types
(WFL Publisher, 2013) Tarakçı, Zekai; Uǧur, Atnan; Temiz, Hasan; Dağ, Beşir
The aim of this study was to investigate the effects of adding yogurt and roasting treatment on some physicochemical, L*, a* and b* colour values and organoleptic acceptability properties of lettuce types. The 10 different lettuce varieties included kasam, mangano, robinson, olenka, arapsaçi{dotless}, red leaf, lolorosso, red salat, palamet and salanova were used. After cleaning and cutting into 0.5 mm, the lettuces were roasted with equal amount added yogurt for about 5 min and then applied to the mixing process. There were significant differences in dry matter and pH values between the lettuces added yogurt and raw lettuces. While dry matter of lettuces was increased significantly with yogurt, the pH levels were decreased. The whiteness values (L*) for lettuces have caused significant differences by adding yogurt and roasting applications. L* values of control sample without lettuces were significantly higher than the samples prepared by adding yogurt to lettuces. Lettuce types had a significant effect on the L* colour of samples. The lettuces were a significant a* color values between before and after roasting. After adding yogurt to lettuces; b* values of kasam, robinson and olenka colour values were significantly higher than the other samples prepared by adding yogurt to lettuce types. The lowest overall acceptability scores were detected for olenka, robinson and lolorosso lettuce types while the highest overall acceptability scores were detected for arapsaci, red salat and salanova lettuce types, which were common use in Turkish meals.
238U and total radioactivity in drinking waters in Van province, Turkey
(Taylor & Francis, 2014-04) Selçuk Zorer, Özlem; Dağ, Beşir
As 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.
Comparatives of physico chemical composition mineral and heavy metal properties of the grape juices grape pekmez and dried grape products in difference plant
(Islamic Press, 2016-10) Dağ, Beşir; Tarakçı, Zekai
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, Melike
Kayısı 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.
Geothermal water potential of Bursa (Turkey) province
(Scholars Middle East Publishers, 2017-12) Dağ, Beşir; Bilgin, Ali
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, Ertuğrul
A 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.
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, Beşir
In 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).
A survey on selected chemical, mineral and heavy metal properties of mulberry pekmez a traditional Turkish product
(Parlar Scientific Publications, 2018-05) Tarakçı, Zekai; Dağ, Beşir
Adsorption of toxic indigo carmen dyestuff from aqueous solution by chitosan and chitosan phthalate
(Applied Chemical Engineering, 2018-11) Ekinci, Selma; Güzel, Fuat
Toxic indigo carmen dyestuff was removed from the aqueous solution by adsorption. Adsorption was examined kinetically and thermodynamically based on temperature. Derivative of chitosan which is called chitosan phthalate was synthesized and used in removal of indigo carmen from aqueous solution. Some kinetic and thermodynamic parameters were calculated. Adsorption isotherms were drawn. Lastly, the adsorption of indigo carmen from the aqueous solution by chitosan and chitosan phthalate were compared.
The investigation of kinetic and thermodynamic properties of the adsorption of trypan blue dyestuff by chitosan and chitosan phthalate
(International Journal of Scientific and Technological Research, 2019-01) Ekinci, Selma; Güzel, Fuat
In this article, toxic Trypan Blue dyestuff was uptaken from water by adsorption method. Chitosan and synthesized chitosan phthalate were used as adsorbents. Adsorption processes were consisted of kinetic and thermodynamic studies. First kinetical experiments were made and the results were practiced to Lagergren, Weber- Morris and Ho- Mckay equations. Adsorption rate constants (kads) and pore diffusion rate constants (kp) were calculated. Then, thermodynamic experiments were performed at different temperatures. Some thermodynamic parameters (ΔH, ΔG and ΔS) and adsorption isotherms were determined. Because Langmuir adsorption isotherms were more suitable, Langmuir constants were calculated. These experiments were performed with both chitosan and chitosan phthalate and the results were evaluated.
Magnetite nanoparticles grafted with murexide-terminated polyamidoamine dendrimers for removal of lead (II) from aqueous solution: synthesis, characterization, adsorption and antimicrobial activity studies
(Journals & Books, 2021-03) Ekinci, Selma; İlter, Zülfiye; Ercan, Selami; Çınar, Ercan; Çakmak, Reşit
In this study, new, efficient, eco-friendly and magnetically separable nanoadsorbents, MNPs-G1-Mu and MNPs-G2-Mu, were successfully prepared by covalently grafting murexide-terminated polyamidoamine dendrimers on 3-aminopropyl functionalized silica-coated magnetite nanoparticles, and used for rapid removal of lead (II) from aqueous medium. After each adsorption process, the supernatant was successfully acquired from reaction mixture by the magnetic separation, and then analyzed by employing ICP-OES. Chemical and physical characterizations of new nanomaterials were confirmed by XRD, FT-IR, SEM, TEM, and VSM. Maximum adsorption capacities (qm) of both prepared new nanostructured adsorbents were compared with each other and also with some other adsorbents. The kinetic data were appraised by using pseudo-first-order and pseudo-second-order kinetic models. Adsorption isotherms were found to be suitable with both Langmuir and Freundlich isotherm linear equations. The maximum adsorption capacities for MNPs-G1-Mu and MNPs-G2-Mu were calculated as 208.33 mg g−1 and 232.56 mg g−1, respectively. Antimicrobial activities of nanoparticles were also examined against various microorganisms by using microdilution method. It was determined that MNPs-G1-Mu, MNPs-G2-Mu and lead (II) adsorbed MNPs-G2-Mu showed good antimicrobial activity against S. aureus ATTC 29213 and C. Parapsilosis ATTC 22019. MNPs-G1-Mu also showed antimicrobial activity against C. albicans ATTC 10231.
In vitro antimicrobial and antioxidant activity of ethanol extract of three hypericum and three achillea species from Turkey
(Taylor & Francis, 2011-02-25) Barış Cebe, Deniz; Kızıl, Murat; Aytekin, Mehmet Çetin; Kızıl, Göksel; Yavuz, Murat; Çeken Toptancı, Bircan; Ertekin, Alaattin Selçuk
The present study was conducted to determine the antimicrobial, antifungal and antioxidant activity of the ethanol extract of Hypericum scabrum L (HSm), Hypericum lysimachioides var. lysimachioides (HL), and Hypericum retusum Aucher (HR) and ethanol extracts of Achillea aleppica D.C. subsp. aleppica (AA), Achillea aleppica D.C. subsp. zederbaueri (Hayek) Hub.-Mor (AZ), and Achillea biebersteinii Afan. (AB). The antioxidant properties of extracts were evaluated using different antioxidants tests, including reducing power, free radical scavenging, deoxyribose assay, metal chelating activities and determination of total phenolic compounds. The extracts obtained from Hypericum and Achillea species showed high antioxidant properties. The protective effects of plant extracts were compared with a well known antioxidant, Butilated Hydroxytoluen (BHT) and α-tocopherol. Total antioxidant activity of ethanol extracts of plants were also tested by using ferric thiocyanate (FTC) and thiobarbituric acid (TBA) methods. Antioxidative activities of plant extracts were found to be comparable with Vitamin E. The results showed that the ethanol extracts of all tested plant exhibited different activity against tested microorganisms. Since most of the studied extracts have good antimicrobial and antioxidant activity, it might be possible to use them as natural food additives that act both as antioxidants and as spices.
Synthesis of rigid and C2-symmetric pyridino-15-crown-5 type macrocycles bearing diamide–diester functions: enantiomeric recognition for chiral primary organoammonium perchlorate salts
(Elsevier, 2014-03-15) Şeker, Sevil; Barış Cebe, Deniz; Arslan, Nevin; Turgut, Yılmaz; Pirinççioğlu, Necmettin; Toğrul, Mahmut
Four novel C2-symmetric macrocyclic compounds with a pyridine function and possessing amide and ester lingeages were prepared. The enantiomeric discrimination abilities of these macrocycles against α-phenylethylammonium and α-(1-naphthyl)ethylammonium perchlorate salts were measured by standard 1H NMR titration techniques in DMSO-d6. A binding constant ratio of 31 (Kbind(S)/Kbind(R)) for two enantiomers of α-(1-naphthyl)ethylammonium salt with the macrocyclic host (S,S)-4 bearing phenyl arms was observed, which corresponds to an enantiomeric discrimination of approximately 94%. Molecular dynamic calculations were performed for some of the supramolecular complexes to in order to gain insight into the mode of molecular recognition between the macrocyclic compounds and ammonium salts; these results were consistent with experimental observations, which may be relevant to those in biochemical processes occurring in organisms.
Chemical constituents and biological activities of cirsium leucopsis, c. sipyleum, and c. eriophorum
(Walter de Gruyter, 2015-03-19) Boğa, Mehmet; Köseoğlu Yılmaz, Pelin; Barış Cebe, Deniz; Fatima, Mashhad; Siddiqui, Bina S.; Kolak, Ufuk
Two endemicCirsiumspecies,C. leucopsisDC. andC. sipyleumO. Schwarz, andC. eriophorum(L.) Scop. growing in Turkey were investigated to establish their secondary metabolites, fatty acidcompositions, and antioxidant and anticholinesterase potentials. Spectroscopic methods were usedto elucidate the structures of thirteen known compounds (p-hydroxy-benzoic acid, vanillic acid,cis-epoxyconiferyl alcohol, syringin, balanophonin, 1′-O-methyl-balanophonin, apigenin, kaempferol-3-O-β-D-glucopyranoside, kaempferol-3-O-α-L-rhamnopyranoside, taraxasterol, taraxasterol acetate,β-sitosterol,β-sitosterol-3-O-β-D-glucopyranoside).cis-Epoxyconiferyl alcohol and 1′-O-methyl-balanophonin were isolated for the first time fromCirsiumspecies. Palmitic acid (47.1 %) was foundto be the main fatty acid ofC. leucopsis, linoleic acid in bothC. sipyleum(42.1 %) andC. eriophorum(37.8 %). Assays ofβ-carotene bleaching, scavenging of 1,1-diphenyl-2-picrylhydrazyl (DPPH) freeradicals, 2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium (ABTS) cation radicals,and superoxide anion radicals, as well as cupric reducing antioxidant capacity (CUPRAC) were usedto determine the antioxidant activities of the extracts and isolated compounds. Vanillic acid, balano-phonin, and kaempferol-3-O-α-L-rhamnopyranoside exhibited strong antioxidant activity. Taraxa-sterol was a potent inhibitor of acetyl- and butyrylcholinesterase activity, respectively.
Organogels as novel carriers for dermal and topical drug delivery vehicles
(Elsevier, 2016-11-24) Uzan, Serhat; Barış Cebe, Deniz; Çolak, Mehmet; Aydın, Haluk; Hoşgören, Halil
Aminoalcohol based bis-(aminoalcohol)oxalamides (BAOAs) (1,6-amino alcohol=leucinol, isoleucinol, valinol, phenylglycinol, phenylalaninol and 2-amino-1-butanol) have been explored to develop drug depot systems and illustrated as a novel dermal and topical drug delivery vehicle for non-steroidal anti-inflammatory drug molecules. FAE's (Fatty acid ethyl and isopropyl esters) with different chain lengths, ethyl laurate, ethyl myristate, ethyl palmitate, isopropyl laurate, isopropyl myristate, isopropyl palmitate, have been chosen as they are biocompatible organic fluids used typically in cosmetic industry. Ibuprofen (Ib), acting as a model drug, was entrapped in the supramolecular organogels. The release behavior of Ib molecules in the supramolecular organogels was investigated by using UV–vis spectroscopy. The influence of the organogelator and drug concentration, pH values of the accepting media, and nature of solvent (different FAE's) on the release behavior of Ib was investigated under static conditions. The results indicated that the release rate of Ib from the supramolecular organogels was effectively retarded with an increase of the organogelator concentration. Also, the release rates of Ib increased on increasing the Ib content. Furthermore, the release behavior of Ib was found to be different at various pH values in buffers as accepting media. The study of the release kinetics indicated that the release behavior of Ib was in accord with the Higuchi equation and the diffusion-controlled mechanism involved in the Fickian model. These observations indicate that bis-(aminoalcohol)oxalamides gels may act as delivery vehicles for non-steroidal anti-inflammatory drug molecules and also show that the release profiles for such systems can be fine-tuned by the correct choice of gelator-FAE combination.

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