Dündar, Abdurrahman
Loading...
Profile URL
Name Variants
Dundar, Abdurrahman
Dundar, A.
Dundar, A.
Job Title
Profesör
Email Address
anzdundar@gmail.com
Main Affiliation
Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
Status
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
Research Products
3GOOD HEALTH AND WELL-BEING
4
Research Products
4QUALITY EDUCATION
0
Research Products
5GENDER EQUALITY
0
Research Products
6CLEAN WATER AND SANITATION
0
Research Products
7AFFORDABLE AND CLEAN ENERGY
0
Research Products
8DECENT WORK AND ECONOMIC GROWTH
0
Research Products
9INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
10REDUCED INEQUALITIES
0
Research Products
11SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
12RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
13CLIMATE ACTION
0
Research Products
14LIFE BELOW WATER
0
Research Products
15LIFE ON LAND
0
Research Products
16PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
17PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents
38
Citations
655
h-index
16
Documents
40
Citations
578
Scholarly Output
36
Articles
30
Views / Downloads
37/301
Supervised MSc Theses
3
Supervised PhD Theses
0
WoS Citation Count
343
Scopus Citation Count
412
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 |
Current Page: 1 / 6
Scopus Quartile Distribution
Competency Cloud
36 results
Scholarly Output Search Results
Now showing 1 - 10 of 36
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, Veysi; Veysl, OkumuşRecently, 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.Presentation Assessment Of The Antimicrobial, Antioxidant And Cytotoxic Activities Of The Wild Edible Mushroom Pleurotus Eryngii From Hakkari, Turkey(2017) Acay, Hilal; Dündar, Abdurrahman; Keskin, Cumali; Kaçar, SemraAbstract: Mushroom is an important source of natural compounds with acknowledged bioactivity. Pleurotus eryngii, in particular, is widely recognized for its organoleptic quality and favorable healthy effects, being commercially produced in great extent. The present study is just for evaluating the antioxidant capacity (scavenging DPPH radicals, reducing power, Total antioxidant activity by β-carotene-linoleic acid metod, Chelating effect on ferrous ions, superoxide anion radical scavenging activity ), antimicrobial effects (by using the disc diffusion method) and insufficiently studied cytotoxic activity (using PC-3 cell lines) of Pleurotus eryngii by using various solvent systems. For this reason; obtained extracts of the mushroom applying hexane, ethylacetate and methanol respectively were tested with in its biologic activities. As a result, The highest total antioxidant activity by β -carotene-linoleic acid metod was identified in methanol extract (63.62 mg /ml). The highest DPPH scavenging activity was obtained from ethyl acetate extract with 88.81 mg/ml. EDTA is used as standard in methal chelating activity. The highest metal chelating activity of Pleurotus eryngii identified in hexane (88,1 mg /ml) and ethylacetate (88.84 mg /ml) extracts. Additionally, in most of studied tests antioxidant activity of the mushroom increased with increasing concentration. On the other hand, the highest antimicrobial activity was obtained against Pseudomonas aeruginosa ATCC 27853 (11 mm) in ethyl acetate extract. However, the best antimicrobial activities were observed in hexane and methanol extracts for other tested microorganism. It was not determined any antimicrobial activity against Escherichia coli ATCC 25922. It has been found that the potential of cytotoxic activity is depended on concentration and solvent type of extracts. Ethyl acetate extract showed significant inhibitory value at the concentrations of 530 µg/ml (86.20 %) against PC-3 cell lines. Using methanol extract, the maximun inhibition was observed at concentration of 680 µg/ml with value of 51.86 %. Overall, the mushroom used as a daily nutrient could be a source for new drug developments and a kind of treatment in cancer therapies, and also, organic extracts of Pleurotus eryngii may contain substances that stimulate bioactivityArticle Citation - WoS: 24Citation - Scopus: 24Solid Phase Extraction Based on the Use of Agaricus arvensis as a Fungal Biomass for the Peconcentrations of Pb and Al Prior to Their Determination in Vegetables by ICP-OES(ATOMIC SPECTROSCOPY, 2013) Kilinc, E (Kilinc, Ersin); Dündar, Abdurrahman; Özdemir, Sadin; Okumuş, Veysi; Dändarb, Abdurrahman; Okumusc, VeysiA solid phase extraction (SPE) method based on the use of a fungal biomass as sorbent was developed for the preconcentrations of Pb and Al. Agaricus arvensis was immobilized on Amberlite XAD-4 and loaded onto a column. Important parameters such as pH and flow rate of the solution, amount of biosorbent and resin, volume of sample solution, which affect the efficiency of the preconcentration procedure for Pb and Al, were optimized. The effect of possible interfering ions, i.e., Cd2+, Cu2+, Ni2+, Zn2+, Co2+, Na+, K+, Ca2+, Mg2+, and Fe2+, was investigated. Experiments on the repeatability of the solid phase column showed that the same column could be used at least 30 cycles without loss of the biosorption efficiency for the recovery of Pb and Al. The limit of detection (LOD) of Pb and Al was found to be 0.10 ng m(L-1) and 0.03 ng mL(-1), respectively. The sensitivity of ICP-OES improved 39.8-fold for Pb and 39.5-fold for Al. Linearity was obtained in the concentration range of 1.25-50.0 ng mL(-1) for Pb and 0.5-50.0 ng mL(-1) for Al. The relative standard deviation (RSD) of the method under optimum conditions was lower than 8.4% (n=5) for Pb and Al, which was validated through the analysis of certified reference tea and poplar leaves samples. The biosorption capacity of immobilized Agaricus arvensis for Pb and Al was found to be 31.2 mg g(-1) and 45.7 mg g(-1), respectively. The developed method was applied to determine the concentrations of Pb and Al in various edible vegetable samples (cucumber, okra, tomato, beans, aubergine, watermelon, zucchini, pepper, melon, lettuce, roka, purslane, scallion, cress, parsley, cabbage, sugar cane, and basil) grown along the cultivated banks of the Tigris River in Diyarbakir, Turkey.Article Citation - WoS: 30Citation - Scopus: 37Mononuclear Complexes Based on Pyrimidine Ring Azo Schiff-Base Ligand: Synthesis, Characterization, Antioxidant, Antibacterial, and Thermal Investigations(WILEY-V C H VERLAG GMBH, 2014) Gulcan, Mehmet; Ozdemir, Sadin; Dundar, Abdurrahman; Ispir, Esin; Kurtoglu, MukerremSix transition metal(II) complexes with the heterocyclic ligand HL (1), [CuL2]center dot H2O (2), [NiL2]center dot 3H(2)O (3), [CoL2]center dot 3H(2)O (4), [MnL2]center dot 3H(2)O (5), [ZnL2]center dot 2H(2)O (6), [PdLOAc]center dot H2O (7) [HL = 5-benzoyl-1-((E)-(2-hydroxy-5-((E)-phenyldiazenyl)benzylidene)amino)-4-phenylpyrimidin-2(1H)-one] were synthesized. The features of the azo Schiff bases were assigned from microanalytical, spectroscopic (IR, UV/Vis., H-1- and C-13 NMR, API-ES mass), magnetic, and molar conductivity measurements at room temperature as well as thermal analysis. The electronic absorption spectroscopy and magnetic susceptibility measurements of the complexes indicate square pyramidal arrangement for Pd-II and octahedral environment for all the other complexes. The azo Schiff base HL acts as a monobasic tridentate ligand, which commonly coordinates through the oxygen atoms of the phenol OH and the pyrimidine one group, and the nitrogen atom of the azomethine group. The thermal behaviors of the ligand and its metal complexes were studied using thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The metal complexes proved to be more thermally stable than the ligand; they decomposed at 10-30 degrees C higher temperatures. Antioxidant properties of the ligand and its metal complexes (DPPH free radical scavenging, ferrous chelating and reducing power activities) were tested. Antimicrobial activities were studied with gram-positive bacteria, which included Bacillus subtilis and Staphylococcus aureus, whereas Escherichia coli and Pseudomonas aeruginosa represented gram negative bacteria.Article Citation - WoS: 27Citation - Scopus: 29Preparation, spectral studies, theoretical, electrochemical and antibacterial investigation of a new Schiff base and its some metal complexes(ELSEVIER SCIENCE BV, 2014) Ilhan, S.; Baykara, H.; Seyitoglu, M. S.; Levent, A.; Ozdemir, S.; Dundar, A.; Oztomsuk, A.; Cornejo, M. H.A new Schiff base ligand, 1,6-Bis(2-(5-bromo-2-hydroxybenzylideneamino)-4-chlorophenoxy)hexane was synthesized. Some Schiff metal complexes of the new Schiff base were prepared by the reaction of some metal salts and the Schiff base. The complexes are non-electrolytes as shown by their molar conductivities (Lambda M). The structures of metal complexes are proposed from elemental analysis, FT-IR, UV-vis, magnetic susceptibility measurements, molar conductivity measurements, mass spectra and thermal gravimetric analysis. In addition theoretical H-1 NMR, HOMO-LUMO studies of the ligand; antimicrobial and cyclic voltammetric studies of the compounds were also carried out. In this study antioxidant and antibacterial activities of the compounds were examined via in vitro methods. (C) 2014 Elsevier B.V. All rights reserved.Article Citation - WoS: 1Investigation of Nutritional Content, Antioxidant Anticancer and Antimicrobial Activities of Pleurotus eryngii (DC. Ex Fr.) Quel, Extract Obtained by Different Solvents(KSÜ Tarım ve Doğa Dergisi, 2021) Acay, Hilal; Dündar, Abdurrahman; Kaçar, Semra; Baran, Mehmet Fırat; Keskin, CumaliThe present study related the nutritional contents, fatty acidcompositions, in vitro antioxidant, anticancer and antimicrobialactivities of different solvents extracts of Pleurotus eryngii. Thenutritional contents of the P. eryngii were investigated in detail.Crude protein (g 100 kg-1), carbohydrate (g 100 kg-1), lipid (g 100 kg1), ash (g 100 kg-1), dietary fiber (g 100 kg-1) and energy value (cal100 g-1) of fruiting bodies were analysed. Fatty acid compositions oftotal lipid, phospholipid and triacylglycerol fractions of Pleurotuseryngii were investigated by Gas chromatography. Totally 13 differentfatty acids constituents were identified. Antioxidant propertiesincluding total antioxidant activity, free radical scavenging activity,reducing power activity, metal chelating activity, and superoxideanion radical scavenging activity were evaluated using different tests.The highest total antioxidant, DPPH scavenging, metal chelating, andsuperoxide anion radical scavenging activities were determined inethyl acetate extracts. The potential of cytotoxic activity on PC-3(prostate cancer) cell lines was found to depend on the concentrationand the type of the tested extracts fractions. It was determined thathexane, ethyl acetate, and methanol extracts of Pleurotus eryngii haveinhibition effect on the growth of tested microorganisms. The presentresults suggested that used as a daily nutrient, the Pleurotus eryngiicould be a novel source for new drug developments and promising insome cancer treatment.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.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 Salih; Solgun, Derya GungorduIn 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 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.
