Dündar, Abdurrahman
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Dundar, Abdurrahman
Dundar, A.
Dundar, A.
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Profesör
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anzdundar@gmail.com
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Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
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Sustainable Development Goals
17
PARTNERSHIPS FOR THE GOALS
0
Research Products
2
ZERO HUNGER
0
Research Products
5
GENDER EQUALITY
0
Research Products
6
CLEAN WATER AND SANITATION
0
Research Products
13
CLIMATE ACTION
0
Research Products
10
REDUCED INEQUALITIES
0
Research Products
16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
15
LIFE ON LAND
0
Research Products
3
GOOD HEALTH AND WELL-BEING
4
Research Products
9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
14
LIFE BELOW WATER
0
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4
QUALITY EDUCATION
0
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1
NO POVERTY
0
Research Products
7
AFFORDABLE AND CLEAN ENERGY
0
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11
SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
Documents
38
Citations
655
h-index
16
Documents
40
Citations
578
Scholarly Output
36
Articles
30
Views / Downloads
154/3363
Supervised MSc Theses
3
Supervised PhD Theses
0
WoS Citation Count
343
Scopus Citation Count
412
WoS h-index
11
Scopus h-index
13
Patents
0
Projects
2
WoS Citations per Publication
9.53
Scopus Citations per Publication
11.44
Open Access Source
12
Supervised Theses
3
| Journal | Count |
|---|---|
| BIOREMEDIATION JOURNAL | 3 |
| Atomic Spectroscopy | 2 |
| ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2 |
| Chemosphere | 1 |
| Cogent Food and Agriculture | 1 |
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Article Citation - WoS: 7Citation - Scopus: 6Several biological properties and synthesis of 2-(4-methylthiazol-5-yl) ethoxy substitute zinc phthalocyanine(John Wiley and Sons Ltd, 2023) Güngördü Solgun, Derya; Özdemir, Sadin; Dündar, Abdurrahman; Ağırtaş, Mehmet SalihIn this study, 4-(2-(4-methylthiazol-5-yl) ethoxy) phthalonitrile (3) and zinc phthalocyanine complex (4) were synthesized and characterized. UV–vis and fluorescence spectra, aggregation, and fluorescence parameters of the zinc phthalocyanine compound were investigated. As biological properties, DPPH radical capture, antidiabetic, DNA cutting, antimicrobial, photodynamic antimicrobial, anti-biofilm activities, and microbial cell viability parameters of the compounds were determined. The highest antioxidant activity was found as 62.80% at 100 mg/L concentration with compound 4, and compound 4 also showed the best antidiabetic activity as 65.17% at 400 mg/L concentration. In DNA cutting activity, it was determined that 3 and 4 cut DNA at all concentrations. For compounds 3–4, the minimum inhibitory concentration (MIC) values were found to be 32 and 16 mg/L for Enterococcus hirae and Enterococcus feacalis, respectively. The strongest MIC value of photodynamic antimicrobial activity was achieved as 4 mg/L for E. feacalis with 4. It was observed that both compounds inhibited the microbial viability activity of Escherichia coli by 100% at concentrations of 100 mg/L. Compound 4 inhibited biofilms of Pseudomonas aureginosa and Staphylococcus aureus as 92.48% and 98.56% at 50 mg/L concentration, respectively.Master Thesis COVID-19 tanısı konan hastaların cinsiyet ve yaş faktörlerinin bazı biyokimyasal değerlerle korelâsyonunun araştırılması(Mardin Artuklu Üniversitesi, 2022) Çömez, Mehmet; Dündar, Abdurrahman2019 yılının son döneminde Wuhan şehrinde ortaya çıkan Covid-19 hastalığı çok hızlı bir şekilde dünyaya yayılış göstermiş ve kısa bir süre sonra ülkemizde görülmeye başladı. Covid-19 ile ilgili önemli çalışmalar yapılmakta bu virüs ve benzeri virüs kökenli hastalıkların tespiti ve erken teşhisi ile tedavi amaçlı Crp, Lym, Ferritin, Kan Gazı ve D-dimer gibi bazı biyokimyasal değerlerin düzeylerinin hastalık şiddeti ve diğer biyokimyasal değerler ile ilişkisini değerlendirilmesi ve bu biyokimyasal değerlerin yaş, cinsiyet üzerindeki etkilerini değerlendirmeyi amaçladık. Yaptığımız çalışmada, hasta dosyalarının retrospektif incelenmesine dayalı kesitsel ve tanımlayıcı bir çalışmadır. 01 Haziran 2020 ile 30 Mayıs 2021 tarihleri arasında Kızıltepe devlet hastanesine başvuran ve hastalık tanısı konulan 12 aylık süreçte hastaların Crp, Lym, Ferritin, Kan Gazı ve D-dimer gibi bazı biyokimyasal değerleri ve aynı zamanda bu değerlerin diğer biyokimyasal değerler arasındaki ilişki ile bu değerlerin yaş ve cinsiyete olan etkileri incelendi ve analizleri yapıldı. Araştırma da elde edilen veriler SPSS for Windows 25.0 programı kullanılarak analiz edilmiştir. Verileri değerlendirilirken tanımlayıcı istatistiksel metotları (sayı, yüzde, ortalama, standart sapma) kullanılmıştır. Çalışmamız da inceleyeceğimiz tüm parametreleri eksiksiz olan 01 Haziran 2020 ile 30 Mayıs 2021 tarihleri arasında Kızıltepe devlet hastanesine başvuran ve COVID-19 tanısı koyulan 1812 hasta dahil edildi. Bu hastalardan %51,9'u (n: 941) kadın % 48,1 (n: 871) erkektir. Ve yaş ortalaması 56,58±19,89 olarak hesaplanmıştır. Yaptığımız çalışmaya göre Crp ve Ferritin değerleri erkeklerde daha yüksek, Lenfosit düzeyleri ise kadınlar daha yüksek olduğu saptandı. Ayrıca Crp, Ferritin ve D.Dimer değerleri ile yaş arasında pozitif yönde, Lenfosit ile yaş arasında ise negatif yönde anlamlı bir ilişki saptandı. Biyokimyasal değerlerin hastalığın klinik seyrinde önemli bir biyolojik belirteçler olduğu literatürde ki araştırmalar ile uyumludur. Covid-19 ile ilgili çok sayıda araştırma yapılmış ve literatüre kazandırılmıştır ve yeni çalışmalarda yapılmaktadır. Bizde biyokimyasal değerlerin Covid-19'un klinik seyrinde biyolojik belirteç olarak kullanılması ayrıca bu değerlerin yaş ve cinsiyet üzerindeki ilişkisinin tespitinin hastalığın seyrinde önemli olduğundan bu konu ile ilgili literatüre katkı sağlamayı amaçladık. Hastalığı daha ağır geçiren erkeklerde Crp ve Ferritin değerleri analiz sonuçlarına göre anlamlı yüksek olduğu görüldü. Lenfosit değerinin ise erkeklerde daha düşük olduğu saptandı. Yaşa bağlı olarak ise ileri yaşlarda Crp, Ferritin ve D.Dimer değerlerinin yüksek, Lenfosit değerinin düşük olması mortalite ile bağlantılı olduğunu gösterdi.Article Analysis of legionella and Some Chemicals in Water Samples in Mardin Province(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2022) Dundar, Abdurrahman; Yildirim, Idris; Dundar, Nagihan DemirIn this study microbiological and chemical analyzes were carried out on water and swab samples taken from two water wells, a water tank and taps of buildings belonging to a public institution in Mardin Province. In these specimens the presence of Legionella and its serogroups as well as the parameters such as chlorine, nitrate, nitrite concentration, pH level and electrical conductivity were analyzed. While Legionella growth was not observed in 25 water samples, L. pneumophila serogroup 1 was detected in 4 of 25 swab culture samples taken from the same places. The pH values of water samples ranged from 7.53 to 8.02 the lowest pH value was observed in well no 1 as 7.53 while the highest was observed in well no 2 as 8.02. The lowest electrical conductivity value was measured at well 2 as 376.44 mu S cm(-1) and the highest was measured as 446.57 mu S/cm from well 1. As a result of the analyzes made in our research nitrite was not detected in any of the water samples. Whilst the nitrate amount was found to be the lowest with 4.30 ppm in the well, the highest with 10.85 ppm in the well 2. The chlorine values in the well 1 and 2 from which water samples were taken and the main tank were measured as 2.21, 2.05 and 2.43 ppm respectively. These values were found to be in the range of 1.68-1.73 ppm in the samples taken from the building taps.Article Citation - WoS: 10Citation - Scopus: 10Preconcentration of Sn in Real Water Samples by Solid Phase Extraction Based on the Use of Helvella leucopus as a Fungal Biomass Prior to its Determination by ICP-OES(ATOMIC SPECTROSCOPY, 2013) Kilinc, Ersin; Dundar, Abdurrahman; Ozdemir, Sadin; Okumus, VeysiRecently, biosorbents of biological origin such as fungus, algae, and bacteria have found special application as packing material in solid phase extraction (SPE). In this study, an alternative SPE method was developed and validated for the preconcentration of Sn prior to its determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Helvella leucopus, a fungal biomass, was used as the biosorbent in the column studies. Experimental parameters, such as pH and flow rate of the solution, amounts of biosorbent and resin, and volume of the sample solution which affects the analytical results, were investigated. Effects of possible interfering ions on the SPE preconcentration of Sn were investigated. The sensitivity of ICP-OES was improved 47.1 times for Sn. The LOD and LOQ values were 0.06 and 0.21 ng respectively. Linearity was obtained in the concentration range of 1.0-30 ng mL(-1) for Sn. The loading capacity of Helvella leucopus immobilized Amberlite XAD-4 was 10.4 mg g(-1). The concentrations of Sn in the water samples from the Tigris River were determined using the developed method and validated by analysis of the certified reference material NWTM-26.3 Fortified Water sample.Article Citation - WoS: 1Citation - Scopus: 1Effect of pleurotus Ostreatus Water Extract Consumption on Blood Parameters and Cytokine Values in Healthy Volunteers(Routledge Journals, Taylor & Francis Ltd, 2024) Dundar, Abdurrahman; Yalcin, Pinar; Arslan, Nurgul; Acay, Hilal; Hatipoglu, Abdulkerim; Boga, Mehmet; Yaprak, BulentObjective: Our aim in this study is, does 29-day regular consumption of Pleurotus ostreatus water extract by volunteer individuals who meet the study criteria have an effect on blood and cytokine values? Method: In accordance with the purpose of the study, volunteers were asked to consume 100 ml of the extract every morning for 29 days. Three tubes of blood samples were taken from the volunteers on the 15th and 29th days of the study. Biochemical and hematological analysis of the blood samples were performed and immunomodulatory effects through cytokines were examined. The values obtained from 3 tubes of blood obtained from volunteers before the use of mushroom extract were used as control. The chemical composition and beta-glucan content of 100 ml of mushroom water extract were also analyzed. Result: IL-4, IL-6, IL-10 and IL-13 could not be detected because the values were below the lowest standard value. TNF-alpha, IFN-gamma and IL-1 beta 15th and 29th day values decreased compared to the 1st day (control) values (p < 0.05). However, there was no significant difference observed between the 15th and 29th day. No abnormalities were observed in biochemical and hematological values. Also, the beta-glucan content of extract was found 38.12 mg/100 ml. Conclusion: The frequency range of kidney and liver function test results confirmed that P. osreatus is a reliable food source. Considering the cytokine values these results indicate that P. ostreatus water extract has an anti-inflammatory effect. As no significant difference was observed in 29 days of use, it is thought that 15 days of daily consumption of the extract may be sufficient for the anti-inflammatory effect to occur. However, a large number of qualified clinical trials are needed to support the issue.Article Citation - WoS: 4Citation - Scopus: 4Application of Half-Sandwich Metal-Phosphinite Compounds to Biological Activities: Determine the energies of the HOMO and LUMO levels(Wiley Online Library, 2022) Meriç, Nermin; Rafikova, Khadichakhan; Zazybin, Alexey; Güzel, Remziye; Kayan, Cezmi; Karakaş, Duygu Elma; Dündar, Abdurrahman; ISLAM, Sholpan; Okumuş, Veysi; Aydemir, MuratMononuclear transition metal complexes 1-(furan-2-yl)ethyldiphenyl[dichloro(η6-p-cymene)ruthenium(II)]phosphinite, (2), 1-(furan-2-yl)ethyldiphenyl[dichloro(η6-benzene) ruthenium(II)] phosphinite (3), 1-(furan-2-yl)ethyldipheny[chloro(η4-1,5-cyclooctadiene)rhodium(I)]phosphinite (4), 1-(furan-2-yl)ethyldiphenyl[dichloro (η5pentamethylcyclopentadienyl)iridium (III)] phosphinite (5) were synthesized and characterized by microanalysis, infrared, MS, and NMR spectroscopy. The biological activities of the complexes were also tested. Compounds 2 and 5 were the best complexes at DPPH radical scavenging and reducing power activity at 73.27 % and 0.41 at 200 μg/mL, respectively. The highest antimicrobial activity exhibited by complex 3 as 14 mm inhibition zone against S. aureus. All of the complexes have cleaved the DNA from the double-strand and exhibited three bands on gel electrophoresis. Moreover, cyclic voltammetry studies of the phosphinite complexes were carried out to determine the energies of the HOMO and LUMO levels as well as to estimate their electrochemical and some electronic properties.Article Citation - WoS: 12Citation - Scopus: 14Preconcentration with Bacillus subtilis-Immobilized Amberlite XAD-16: Determination of Cu2+ and Ni2+ in River, Soil, and Vegetable Samples(TAYLOR & FRANCIS INC, 2015) Okumus, Veysi; Ozdemir, Sadin; Kilinc, Ersin; Dundar, Abdurrahman; Yuksel, Uyan; Baysal, ZubeydeSolid-phase extraction (SPE) method was developed for the preconcentration of Cu2+ and Ni2+ before their determination by inductively coupled plasma optical emission spectrometry (ICP-OES). Bacillus subtilis-immobilized Amberlite XAD-16 was used as biosorbent. Effects of critical parameters such as pH, flow rate of samples, amount of Amberlite XAD-16 and biosorbent, sample volume, eluent type, and volume and concentration of eluent on column preconcentration of Cu2+ and Ni2+ were optimized. Applicability of the method was validated through the analysis of the certified reference tea sample (NCS ZC73014). Sensitivity of ICP-OES was improved by 36.4-fold for Cu2+ and 38.0-fold for Ni2+ by SPE-ICP-OES method. Limit of quantitation (LOQ) was found to be 0.7 and 1.1ng/ml for Cu2+ and Ni2+, respectively. Concentrations of Cu2+ and Ni2+ were determined by ICP-OES after application of developed method. Relative standard deviations (RSDs) were lower than 4.9% for Cu2+ and 7.9% for Ni2+. The Tigris River that irrigates a large agricultural part of Southeast Turkey is polluted by domestic and industrial wastes. Concentrations of Cu2+ and Ni2+ were determined in water, soil, and some edible vegetables as a biomonitor for heavy metal pollution.Article Citation - WoS: 22Citation - Scopus: 23Antioxidant Properties of Cultured Mycelia from Four Pleurotus Species Produced in Submerged Medium(TAYLOR & FRANCIS INC, 2013) Dundar, Abdurrahman; Okumus, Veysi; Ozdemir, Sadin; Yildiz, AbdunnasirThe ethanolic extracts of dried cultured mycelia of Pleurotus ostreatus, Pleurotus eryngii, Pleurotus florida, and Pleurotus sajor-caju were analyzed for antioxidant activity in different systems. Tests used are as follows: reducing power, free radical scavenging, superoxide anion radical scavenging, total antioxidant activity, metal chelating activitiy, etc.; total phenolic content was determined. The percentage inhibition of P. ostreatus, P. eryngii, P. florida, and P. sajor-caju at 20 mg/mL concentration on peroxidation in a -carotenelinoleic acid system was 57.19, 60.68, 62.12, and 58.81%, respectively. The reducing power of P. eryngii was higher than the other samples, and its value was 0.86 at 10 mg/mL concentration. P. ostreatus and P. sajor-caju proved to be better at scavenging superoxide anion radicals than the P. eryngii and P. florida. In the scavenging effect of DPPH radical test, P. ostreatus showed the highest activity potential and P. sajor-caju showed the strongest metal chelating capacity.Article Citation - WoS: 27Citation - Scopus: 34Metallo and metal free phthalocyanines bearing (4-(1(4-phenoxyphenyl)-1-phenylethyl)phenol substituents: Synthesis, characterization, aggregation behavior, electronic, antioxidant and antibacterial properties(ELSEVIER SCIENCE SA, 2014) Agirtas, M. Salih; Guven, M. Emin; Gumus, Selcuk; Ozdemir, Sadin; Dundar, AbdurrahmanAs starting material the phthalonitrile derivative bearing (4-(1(4-phenoxyphenyl)-1-phenylethyl)phenol substituents at peripheral position was prepared by a nucleophilic displacement reaction. Cyclotetramerization of 4-(4-(1-(4-hydroxyyphenyl)-1-phenylethyl)phenoxy)phthalonitrile derivative in the presence of corresponding metal salts gave the new metallophthalocyanines. Metal free phthalocyanine was obtained from the reaction of 4-(4-(1-(4-hydroxyyphenyl)-1-phenylethyl)phenoxy)phthalonitrile units. The novel compounds have been characterized by using various spectroscopic data. The aggregation investigations carried out in different concentrations indicate that 4-(4-(1-(4-hydroxyyphenyl)-1-phenylethyl)phenoxy)phthalocyanine compounds do not have any aggregation behavior for the concentration range of 10(-4)-10(-5) M in tetrahydrofuran. The antioxidant activities of novel compounds were analyzed through radical scavenging ability of 1,1-dipheny1-2-picrylhydrazyl, chelating ability to ferrous ions and reducing power. In addition to these, the antibacterial activities of compounds were investigated. Moreover, the ground-state geometries of the complexes were optimized using B3LYP/6-31G(d,p) level of density functional theory in order to predict the three-dimensional geometries and electronic structure. (C) 2014 Elsevier B.V. All rights reserved.Article Citation - WoS: 3Citation - Scopus: 4Synthesis, Characterization, Aggregation Behavior, Antioxidant Activity, and Antibacterial Activity of Metallophthalocyanines Carrying Four Phthalonitriles Group(Editura Acad Romane, 2016) Guven, M. Emin; Dündar, Abdurrahman; Agirtas, M. Salih; Ozdemir, Sadin; Dundar, Abdurrahman; 21.02. Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü; 21. Vocational School of Health Services / Sağlık Hizmetleri Meslek Yüksekokulu; 01. Mardin Artuklu University / Mardin Artuklu ÜniversitesiA novel phthalonitrile derivative and zinc (II), cobalt (II), and cupper (II) phthalocyanines complexes were synthesis and characterized. The novel compounds have been characterized by using various spectroscopic data FTIR, UV/vis, NMR, elemental analysis etc. The aggregation investigations carried out in different concentrations indicate that 4- (4-(1-(4-phenoxypheny1)-1-phenylethyl)phenoxy)phthalonitrile substituted phthalocyanine compounds do not have any aggregation behavior for the concentration range of 10(-4)-10(-5) M in tetrahydrofuran. The antioxidant properties of the phthalonitrile and its phthalocyanine compounds were evaluated in three series of in vitro tests: DPPH free radical scavenging, ferrous ion chelating activity and reducing power. Antimicrobial activities of compounds were investigated.
