Tıbbi Hizmetler ve Teknikler Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/159

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DITERPENEOIDS AND ALZHEIMER
(2023) Demirel, Mehmet Ferit; Ertaş, Abdulselam
Salvia L. türlerinin halk arasında kullanımı ve bilim dünyasındaki önemi her geçen gün artmaktadır. Salvia türlerinin bu kullanımının ve öneminin çoğunlukla içerdikleri terpenoid bileşiklerden kaynaklandığı düşünülmektedir. Doğal ürünlerde en bol bulunan bileşikler olan terpenoidler, bitkilerde farklı yapılara sahip bir dizi önemli ikincil metabolittir. Terpenoidler bitki büyümesi ve gelişmesinde, çevreye tepkisinde ve fizyolojik süreçlerde anahtar rol oynar. Hammadde olarak terpenoidler ilaç, gıda ve kozmetik endüstrilerinde de yaygın olarak kullanılmaktadır. Terpenoidler, farklı etkileri ve farklı etki mekanizmaları olan karmaşık bir yapıya sahiptir. Bu derlemede terpenoidlerin aktiviteleri ve mekanizmaları incelenerek terpenoid bileşikleri içerisinde önemli bir yere sahip olan diterpeneoidler üzerinde durulmuştur. Diterpen türlerinde oksijen ile daha kolay etkileşme görülmektedir. Bu yapısal farklılıkları nedeniyle doğal ürünler içerisinde diterpenler, en geniş biyolojik etkiye sahip bileşiklerdir. Alzheimer hastalığı, beyinde amiloid birikiminden kaynaklı olmakla beraber kolinerjik nörotransmisyon eksikliği ile, yaşlı nufüs üzerinde görülen yaygın bir demans şeklidir. Bu çalışmada, özellikle Salvia türlerinden ekstrakte edilen diterpeneoidlerin alzehiemer hastalığı üzerindeki etkileri ile ilgili çalışmalar derlenmiştir. Diterpeneoidlerin Alzheimer hastalığı üzerindeki çalışmaları in vitro ve in vivo şeklinde ayrı ayrı veri tabanları taranarak derlenmiştir. Sonuç olarak Salvia türlerinden ekstraksiyon ile elde edilen terpenoid türevi olan diterpenoidlerin, hala kesin bir tedavi seçeneği sunulamayan Alzheimer hastalığı üzerindeki etkinliği hakkındaki çalışmaların dikkate değer olduğu görülmektedir.
Synthesis of Drug Loaded Magnetic Nanocomposite and Investigation of Cytotoxic Properties
(2023)
This aims of study to develop drug delivery systems providing an alternative solution to cancer chemotherapy. Firstly, carboxymethyl dextran which has magnetic properties (MD), was synthesized as stated in the literature.1-3 Its structure was elucidated with various analytical devices. Then, loading studies were carried out on the nanocomposite with topotecan (TP) (in the range of 0.2-40 µM in phosphate buffer at pH 5) as an anticancer drug. The cytotoxic properties of MD, TP, drug loaded MD (MD-TP), and free TP were studied on human prostate cancer cell (Du145) and human healthy prostate cell (PNT1A) line. The synthesized MD and MD-TP nanocomposites were characterized by different analytical devices such as FTIR, XPS, UV-VIS, VSM, TEM, SEM and DLS. According to the FTIR results, the presence of peaks belonging to functional groups in the expected places indicates that MD was successfully synthesized and TP was successfully loaded on nanocomposite. According to TEM image, the MD particles showed a spherical structure, and also, the particle size was measured as 9 ± 1.8 nm. The SEM image of MD indicated that the nanoparticles were aggregated. Furthermore, after the loading TP, the brightly colored particles of TP were observed on some parts of the surface of MD. Moreover, DLS measurements of the nanoparticles were taken before and after loading the drug. Due to high agglomeration of the magnetic nanoparticle, it showed polydispersity. In addition, cytotoxicity effects of drug loaded nanocomposites on Du145 and PNT1A cell lines were investigated and the results were found to be statistically significant. The topotecan loaded MD-TP nanocomposite have shown cell viability to be reduced by up to 20 %. It has been shown that synthesized polymer coated superparamagnetic nanocomposites with these properties can be used in drug targeting studies.
Myeloprotective and hematoprotective role of kefir on cyclophosphamide toxicity in rats
(2021) Gözüoğlu, Gülay; Cetik Yildiz, Songul
Abstract Aim: Kefir is a probiotic and prebiotic beverage produced from milk and kefir grains containing a mixture of bacteria and yeast. Drugs like cyclophosphamide (CPx) that are used for cancer chemotherapy are generally limited due to numerous unwanted side-effects such as multiple organ toxicity. For this purpose, the cell-protective effects of kefir, a natural probiotic known for its antitumor and antioxidant properties, on CPx-induced hemotoxicity and myelotoxicity were investigated in this study. Methods: Group 1 (control, 0.5 ml SF). Group 2 were administered a single dose of 150mg/kg CPx. Group 3 and 5 were given 5 and 10mg/kg kefir. Group 4 and 6 were given 5 and 10mg/kg kefir+150mg/kg CPx. While kefir was administered to the rats by gavage method for 12 days, CPx was administered as single-dose on the 12th day. Results: The DPPH results showed that kefir possesses high antioxidant activity. It was observed that the leukocytes, thrombocytes, erythrocytes, hemoglobin, hematocrit and bone marrow nucleated cell levels decreased in the group that was administered only CPx, and increased relatively in the groups that were administered CPx+kefir, drawing close to the control. Conclusion: The results of the present study showed that kefir had antioxidant and cytoprotective activity, protecting blood and bone marrow cells against CPx-induced damage.
Citation - WoS: 75
Citation - Scopus: 88
Biosynthesis, characterization, and investigation of antimicrobial and cytotoxic activities of silver nanoparticles using Solanum tuberosum peel aqueous extract
(Elsevier, 2023) Xu, Jiujun; Yıldıztekin, Mahmut; Han, Dayong; Keskin, Cumali; Baran, Ayşe; Baran, Mehmet Fırat; Eftekhari, Aziz; Aytuğ Ava, Canan; İrtegün Kandemir, Sevgi; Cebe, Deniz Barış; Dağ, Beşir; Beilerli, Aferin; Khalilov, Rovshan
Metallic nanoparticle biosynthesis is thought to offer opportunities for a wide range of biological uses. The green process of turning biological waste into utilizable products gaining attention due to its economical and eco-friendly approach in recent years. This study reported the ability of Solanum tuberosum (ST) peel extract to the green synthesis of non-toxic, stable, small-sized silver nanoparticles without any toxic reducing agent utilizing the phytochemical components present in its structure. UV-visible spectroscopy, X-ray diffraction analysis, Fourier transform infrared spectroscopy, flourier scanning electron microscopy, atomic force microscopy, transmission electron microscopy, and energy dispersive analysis X-ray confirmed the biosynthesis and char-acterization of silver nanoparticles. Also, dynamic light scattering and thermogravimetric ana-lyses showed stable synthesized nanoparticles. The antibacterial activity of the biosynthesized silver nanoparticles was evaluated against four different bacterial strains, Escherichia coli (E. coli), Pseudomonas aeruginosa (P. aeruginosa), Staphylococcus aureus (S. aureus) Bacillus subtilis (B. subtilis), and a yeast, Candida albicans (C. albicans) using the minimum inhibitory concen-tration technique. The cytotoxic activities were determined against Human dermal fibroblast (HDF), glioblastoma (U118), colorectal adenocarcinoma (CaCo-2), and human ovarian (Skov-3) cell lines cancer cells using MTT test. The nanoparticle capping agents that could be involved in the reduction of silver ions to Ag NPs and their stabilization was identified using FTIR. Nano -particles were spherical in shape and had a size ranging from 3.91 to 27.07 nm, showed crys-talline nature, good stability (-31.3 mV), and the presence of capping agents. ST-Ag NPs significantly decreased the growth of bacterial strains after treatment. The in vitro analysis showed that the ST-Ag NPs demonstrated dose-dependent cytotoxicity against cell lines. Based on the data, it is feasible to infer that biogenic Ag NPs were capped with functional groups and demonstrated considerable potential as antibacterial and anticancer agents for biomedical and industrial applications.
Citation - WoS: 1
Citation - Scopus: 2
Editorial: Biological/chemical-based metallic nanoparticles synthesis, characterization, and environmental applications
(Frontiers Media S.A., 2023) Keskin, Cumali; Eftekhari, Aziz; Khalilov, Rovshan; Kavetskyy, Taras; Prasad, Ram; Rosic, Gvozden Luka
Parts of plants are used to carry out the reduction reactions. Although there are different methods for the synthesis of nanomaterials, biological synthesis is relatively cheap, environmentally friendly, and safe compared to other methods (Ahmadov and Ramazanli, 2019; Ramazanli and Ahmadov, 2022). The aim of the Research Topic on “Biological/Chemical-Based Metallic Nanoparticles Synthesis, Characterization, and Environmental Applications” was to provide an integrated view of the state-of-theartresearch on recent advances in biosynthesis, characterization of biological/chemicalbased nanomaterials, and their application by providing a comprehensive understanding of the topic through original research and review articles focusing on the biological synthesis method, in which bacteria, fungi, algae, and various.
Van Gölü Doğal Sediment ve Modifiye Sediment Üzerine Krom (III) Adsorpsiyonu (İzoterm ve Termodinamik Analiz Çalışması)
(Dicle Üniversitesi Mühendislik Fakültesi Mühendislik Dergisi, 2020) Alacabey, İhsan; Kul, Ali Rıza; Ece, M. Şakir; Alkan, Hüseyin
Sediment, nehirlerin, göllerin, koyların, haliçlerin ve okyanusların tabanında yer alan yeryüzü katmanıdır. Dünyanın en büyük soda gölü olması, eşine rastlanmayacak büyüklükte ve güzellikte dipten yükselen güncel karbonat sütunları içermesi ve su seviyesinde yaşanan değişimler, Van Gölü’nü dünyanın en ilginç göllerinden biri yapar. Bu çalışmada Van Gölünden alınan doğal sediment ve asitle (HNO3) aktive edilmiş sedimentlerin ağır metal (Cr3+) ile ilişkisi batch adsorpsiyon tekniği kullanılarak saptanmaya çalışılmıştır. Farklı konsantrasyonlardaki krom (Cr3+) iyonlarının ve pH’ın adsoprsiyon prosesi üzerine etkisi araştırılmıştır. Langmuir, Freundlich, Dubinin-Radushkevich (D-R) ve Temkin adsorpsiyon izotermleri hesaplanmıştır. Hem doğal sediment (DS) hem de asitle modifiye edilmiş sedimentin (MS) Langmuir adsorpsiyon izoterm modeline uyum sağladığı bulunmuştur. Bununla birlikte hem doğal adsorbent hem de asitle modifiye edilmiş adsorbentin termodinamik parametreleri hesaplanmış, ΔG° < 0 değerinin adsoprsiyon prosesinin kendiliğinden gerçekleştiğini göstermiştir. Doğal sedimentin yüzey alanı 7.512 m²/g, asit ile aktive edilmiş sedimentin yüzey alanı 79.456 m²/g tespit edilmiş olup aktivasyon işlemi ile çok yüksek bir yüzey alanı elde edilmiştir. Giles adsorpsiyon izoterm sistemine göre H tipi eğriye uyduğu görülmüştür.
Investigation of nasal Staphylococcus aureus carriage by real-time PCR in patients receiving hemodialysis treatment
(2023) Cetik Yildiz, Songul; Demir, Cemil
ABSTRACT Objectives: Staphylococcus aureus, coagulase-negative staphylococci (CoNS), and methicillin-resistant S. aureus (MRSA), which are significant nosocomial pathogens, have become a growing global problem because their carriage and diseases have become resistant to many antibiotics. This study aimed to investigate and determine the rate of MRSA carriage among patients receiving hemodialysis treatment using molecular methods. Methods: In the 254 hemodialysis patients, the nasal carriage rates, susceptibility and resistance to S. aureus, CoNS and MRSA were examined using culture and real-time PCR methods. Nasal samples from hemodialysis patients were examined using real-time PCR. Microscopic examination was performed using the Gram staining method, and S. aureus was identified using catalase and coagulase. The strains were then tested for antibiotic susceptibility. Staphylococci was isolated from 231 of the 254 patients. Results: S. aureus carriage was detected in 50 patients, MRSA in 16, methicillin-susceptible S. aureus (MSSA) in 33, CoNS in 66, methicillin-resistant CoNS (MR-CoNS) in 38, and methicillin-susceptible CoNS (MSCoNS) in 28. S. aureus and MRSA strains exhibited 100% susceptibility to nitrofurantoin, and vancomycin. MSSA strains showed the highest susceptibility to chloramphenicol, clindamycin (84.8%), and co-trimoxazole (36.4%). CoNS showed 100% susceptibility to vancomycin, and 16.7% susceptibility to ampicillin. Vancomycin was found to be the most effective antibiotic against S. aureus, CoNS, and MRSA pathogens identified in patients undergoing hemodialysis, whereas penicillin resistance was found. Conclusions: It can be concluded that one of the most effective ways to prevent the formation of antibiotic resistant strains is the hygiene of the hospital and hospital staff. Real-time PCR is very important for analyzing with high sensitivity.
Investigation of Uroprotective Effects of Seed Methanol Extracts of Hypericum Triquetrifolium Turra. on Cyclophosphamide-Induced Bladder Hemorrhagic Cystitis and Nephrotoxicity in Wistar Albino Rats
(Cukurova Univ, Fac Medicine, 2020) Yildiz, Songul Cetik; Keskin, Cumali; Sahinturk, Varol; Ayhanci, Adnan
Purpose: This study investigated the possible uroprotective effects of Hypericum triquetrifolium Turra. (HT) seed methanol extracts (25,50,100 mg/kg, i.p., for 6 days) against cyclophosphamide (CYP)-induced (150 mg/kg, single dose, i.p.) acute bladder hemorrhagic cystitis (HC) and nephrotoxicity in rats. Materials and Methods: Wistar albino rats used in this study were divided into nine groups, each including seven rats. Group 1 (control) was treated with 0.5ml saline (SF) and Group 2 was treated with CYP (150 mg/kg). Groups 3, 4, 5 were treated with 25, 50, 100 mg/kg HT, respectively while groups 6, 7, 8 were treated with 25, 50, 100 mg/kg CYP + HT, respectively. Finally, Group 9 (control-2) was treated with 0.5ml-%0.2 dimethyl sulfoxide (DMSO). The serum creatinine, blood urea nitrogen (BUN), superoxide dismutase (SOD) and catalase (CAT) levels were measured in blood serum. Results: The CYP-treated rats histopathologically had mild-moderate bladder and renal injuries. The serum creatinine and BUN levels, which are the biochemical markers of renal injury, significantly increased compared to the control group. Conclusion: HT showed a protective effect on CYPrelated bladder HC and nephrotoxicity in rats by inhibiting inflammation and apoptosis.
Chiral Separation of Drug İntermediates with Chiral Nanoparticles
(Bilim ve Kültür Sempozyumu, Batman Üniv., Batman, 2012) TARHAN, TUBA
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Alfa-Metil benzilamin Grupları İçeren Fe3O4@SiO2 manyetik nanoparçacıklar kullanarak rasemik mandelik asidin rezolüsyonu
(2012) Tarhan; Tural; Tural, Tuba; Bilsen; Servet
Tıbbi ve tarımsal ilaçlar, besin katkı maddeleri gibi yararlı kimyasal maddeler ve sıvı kristaller, polimerler gibi materyal bilimi için gerekli enantiyomerik saf bileşiklere olan ihtiyaç son 30 yılda giderek artmıştır. Biyolojik etken maddelerin yapı ve aktivite ilişkileri incelendiğinde tek izomerlerin hedef seçici olmalarından dolayı rasemik karışımlara göre çok daha etkin oldukları görülmektedir. Ayrıca tek enantiyomerden oluşan ilaçların ya çok az ya da hiç yan etkilerinin bulunmaması da etken maddelerin tek izomerlerinin elde edilmesine olan ilgiyi artırmaktadır. Kiral bir ilaç etken maddesinin enantiyomerlerinden birisi vücutta fizyolojik olarak değişiklik yaparken diğer enantiyomeri ya etkili olmaz ya da ciddi fizyolojik zararlara neden olabilir. Bunun sonucu olarak biyolojik sistemler ve ilaçlar arasındaki kiral tanınma oldukça önemlidir. Örneğin softenon isimli bileşiğin (R)-enantiyomeri yatıştırıcı özellik gösterirken (S)-enantiyomeri embriyoda bozukluğa yol açar. Yine benzer şekilde (S)-(-)-propranolol 1960’larda kalp hastalığının tedavisi için β-bloker olarak tanımlanmıştır. Ancak enantiyomeri (R)-(+)-propranolol gebelik önleyici olarak etki eder. Buradan anlaşıldığı gibi enantiyomerler birbirine zıt etki gösterebilirler. Bu nedenle klinik kullanımda bir bileşiğin enantiyomerik saflığı çok önemlidir. Ayrıca enantiyomerlerden biri aktif diğeri inaktif özellik gösterebilir. Kiral bir bileşik olan kloroamfenikol buna en iyi örneklerden biridir. (R,R)-kloroamfenikol antibakteriyel özellik gösterirken, (S,S)-kloroamfenikol inaktif özellik göstermektedir. Bu gibi ilaçların rasemik olarak vücuda alınmasında, gerekli birim miktardaki etken maddeyi karşılamak için rasemik karışımdan iki kat almak gerekmektedir. Ayrıca başlangıç maddeleri ve kaynakların yarısı boşa harcandığı için bu ekonomik açıdan istenmeyen bir durumdur. Bu nedenlerden dolayı tek bir enantiyomer her zaman için rasemik karışıma göre daha fazla biyolojik aktivite gösterir. Biyolojik aktivite bakımından optik saflığın öneminin giderek artmasıyla optik saflığın belirlenmesi için kesin ve güvenilir metotların geliştirilmesine ihtiyaç duyulmuştur. Ayrıca bilindiği gibi son zamanlarda tek enantiyomerli ilaç satışları dünya çapında sürekli olarak büyümektedir. Bu çalışmada kiral organik asit olan mandelik asidin rasemik karışımının rezolüsyonu düşünülmektedir. Bu maddeye benzer özellik taşıyan ve ilaç olarak kullanılan kiral organik asitlere, α-arilpropiyonik asit sınıfından olan (S)-Naproxen, (S)-Ketoprofen, (S)-Flurbiprofen, (S)-Fenilpropiyonik asid ve (S)-ibuprofen örnek olarak verilebilir. Rezolüsyonu yapılmak istenen, kiral bir organik asit olan mandelik asitin her iki enantiyomerik formuda farklı farmokolojik aktiviteye sahiptir. D-mandelik asit, antibiyotik olan ilacın aktivitesini geliştirdiği için terapatik özellik göstermektedir. D-mandelik asidin bu terapik özelliğinden dolayı tıpta kullanılan yaygın ilaçların başında gelir. L-mandelik asidin kullanım alanları, hayvan sağlığında veterinerlikte ilaç ham maddesi olarak kullanılır. Yani hayvan sağlığı ve hayvan bakım ilaçlarında, oral solüsyon olarak kullanılır. Mandelik asit uzun yıllar boyunca tıpta anti bakteriyel olarak, özellikle idrar yolu enfeksiyonları tedavisinde kullanılmaktaydı. Ayrıca cilt hastalıkları tedavisinde, cilt bakım ürünlerinde özellikle yetişkinlerdeki akne sorunlarına iyi bir tedavi sunmaktadır. Rosacea hastalığında (gül hastalığı) iltihaplanma ve kızarıklıkları gidermekte, mandelik asit ürünleri lazer öncesi ve sonrasında, deride meydana gelen tahriş ve kızarıklıkları azaltmada kullanılır. Tüm bu nedenlerden dolayı Mandelik asitin enantiomerlerine ayrılması önem arz etmektedir. Fonksiyonel grup bağlı nanoparçacıklardaki son gelişmeler, biyomedikal alandaki uygulamalar için ümit verici olmuştur. Magnetit(Fe3O4) kimyasal olarak kararlı, toksik ve kanserojen olmayan bir manyetik malzemedir. Magnetit nanoparçacıkları veya nanoparçacık agregatları enzim ve protein immobilizasyonu, RNA ve DNA saflaştırması, manyetik hücre saflaştırması ve ayrılmasında yaygın olarak kullanılmaktadır. Bu uygulamalarda özellikle süperparamanyetik magnetit nanoparçacıklar tercih edilmektedir. Çünkü süperparamanyetik özellik manyetik kompozit parçacıklarının agregasyonunu önler ve manyetik alan uzaklaştırıldığında parçacıkların çözelti içinde hızlı bir şekilde dağılmalarını sağlar. Manyetik ayırma teknikleri, klasik ayırma teknikleriyle karşılaştırıldığında bazı avantajlara sahiptir. Buna bağlı olarak son zamanlarda, biyolojik moleküllerin saflaştırılma ve ayrılması için yüzeyi uygun gruplarla kaplanmış nano ve mikro parçacıkların geliştirilmesine yönelik çalışmalar önem kazanmıştır. Fonksiyonel grup bağlamaya uygun bir platform sağladığı için silika kaplı manyetik nanoparçacık ve nanoparçacık agregatları teknolojik açıdan büyük ilgi görmektedir. Özel bir uygulama için gerekli manyetik nanoparçacıklar, yüzeyde kaplanmış olan silikanın fonksiyonel gruplarının farklılaştırılması ile kolayca hazırlanabilir. Silika, hidroksil(-OH) fonksiyonel gruplarından dolayı bir kaplama metaryeli olarak önem kazanmaktadır. Fonksiyonel grup bağlı nanoparçacıklardaki son gelişmeler, biyomedikal alanda ve ilaç endüstrisindeki uygulamalar için ümit verici olmuştur. Magnetit (Fe3O4) kimyasal olarak kararlı, toksik ve kanserojen olmayan bir manyetik malzemedir. Magnetit nanoparçacıkları veya nanoparçacık agregatları enzim ve protein immobilizasyonu, RNA ve DNA saflaştırması, manyetik hücre saflaştırması ve ayrılmasında yaygın olarak kullanılmaktadır. Bu uygulamalarda özellikle süper paramanyetik nanoparçacıklar tercih edilmektedir. Bunun yanı sıra manyetik nano parçacıkların optikçe aktif (kiral) maddelerin enantiyomerlerine ayrılmasında çok önemli rol oynayacağını düşünmekteyiz. Kiral maddeler R veya S izomerik yapıda olabilir. Bu R ve S yapıların birbirinden ayrılması ilaç dünyası için çok büyük önem taşımaktadır. Çünkü var olan ilaçların birçoğu rasemik yapıda olup, etken maddenin hem R hem de S formunu içermektedir. Oysa bir hastalığın tedavisinde kullanılacak olan etken maddenin R veya S formlarından biri hastalığın tedavisinde görev görmekte diğer form ise kimyasal atık olarak vücutta kalmaktadır. Kullanılmayan form yan etki göstermeyeceği gibi zehir etkisi de gösterebilmektedir. Bu yüzden kiral ayırma her zaman için çok önemli olmuştur.
Citation - WoS: 28
Citation - Scopus: 29
Removal of 17β-estradiol from aqueous systems with hydrophobic microspheres
(Journal of Polymer Engineering, 2021) Alacabey, İhsan; Kireç, Osman; Alkan, Hüseyin; Erol, Kadir
Sub-microparticles have many applications in different fields today. In this study, it is aimed to develop hydrophobic microparticles as an alternative to existing methods and to determine the 17β-estradiol adsorption performance of this adsorbent to purify the 17β-estradiol hormone which is found as an endocrine disruptor in environmental waters with high capacity and low cost. In this study, L-phenylalanine containing Poly(HEMA-MAPA) microparticles were synthesized by microemulsion polymerization and used as adsorbent. Microparticles were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) methods. The size of the Poly(HEMA-MAPA) microparticles used was measured as 120-200 nm. Specific surface area and elemental analysis studies were also conducted. While the surface area of the particles was found to be a very high value of 1890 m2/g, the amount of incorporation of MAPA into the polymeric structure was calculated as 0.43 mmol/g. Adsorption studies were carried out in the batch system under different ambient conditions (17β-estradiol concentration, temperature, ionic intensity). The adsorption capacity of Poly(HEMA-MAPA) microparticles was calculated to be 98.4 mg/g. Isotherm models for adsorption interaction were investigated deeply, and it was determined that the adsorption mechanism is suitable for Langmuir isotherm.
Citation - WoS: 69
Citation - Scopus: 73
Ecofriendly Synthesis of Silver Nanoparticles Using Ananas comosus Fruit Peels: Anticancer and Antimicrobial Activities
(Hindawi, 2021) Baran, Ayşe; Keskin, Cumali; Baran, Mehmet Fırat; Huseynova, Irada; Khalilov, Rovshan; Eftekhari, Aziz; Irtegun-Kandemir, Sevgi; Kavak, Deniz Evrim
Metallic nanoparticles are valuable materials and have a range of uses. Nanoparticles synthesized from plant wastes by environment-friendly methods have attracted the attention of researchers in recent years. Also, the advantages of biological resources and synthesis methods are attracting attention. In this study, silver nanoparticles were synthesized from Ananas comosus fruit peels using ecofriendly method steps. The characterization of the particles obtained was determined by using a UV-visible spectrophotometer (UV-Vis.), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction diffractometer (XRD), Fourier scanning electron microscope (FESEM), and transmission electron microscopy (TEM). The nanoparticles showed maximum absorbance at 463 nm, measuring 11.61 in crystal nanosize, and presented spherical in appearance. An antimicrobial activity test was determined with the minimum inhibition concentration (MIC) method. The nanoparticles showed promising inhibitory activity on the Gram-positive and Gram-negative pathogen microorganisms (Escherichia coli ATCC25922, Staphylococcus aureus ATCC29213, Bacillus subtilis ATCC11774, Pseudomonas aeruginosa ATCC27833 bacteria, and Candida albicans yeast) at low concentrations. The cytotoxic and growth inhibitory effects of silver nanoparticles on different cancer cell lines were examined via the MTT assay. © 2021 Ayşe Baran et al.
Biosorption of Metanil Yellow from Aqueous Solution onto glutaraldehyde cross linked magnetic chitosan nanoparticles
(10th Nanoscience and Nanotechnology Conference, June 2014, Istanbul, TURKEY, 2014, 2014) TARHAN; TURAL; TURAL;, TUBA; BİLSEN; SERVET
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One Step Purification and CovalentImmobilization of Benzaldehyde Lyase BAL EC 4 1 2 38 with Heterofunctional Chelate EpoxyModified Fe3O4 SiO2 Nanoparticles and Its Carboligation Reactivity
(9 th Nanoscience and Nanotechnology Conference (Nano TR-9) Erzurum, 2013) TARHAN, TUBA
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Citation - WoS: 2
Citation - Scopus: 3
Determination and comparison of metal contents in simulated body fluid medium conditions of the plant species by flame atomic absorption spectrometry (FAAS)
(Journal of Research in Pharmacy, 2022) Umaz, Adil; Firat, Aydin; Tokul Olmez, Ozge; Firat, Mehmet; Ertas, Abdulselame; Aydin, Isil
ABSTRACT: The importance of plants in folk medicine and scientific studies is increasing day by day. In this context, the plants pose a danger to human health when they are eaten by the public, consumed as herbal tea or used as medicinal plants especially the toxic metals in their composition. For this reason, determining the macro, micro and toxic element content in the plants is important for health. In this study; the metal contents of root and aerial parts of nine different Salvia species were determined and the chemometric evaluation of the obtained results was made. In the principal component analysis (PCA) made with 20 elements of Salvia species, it was determined that the first two principal components explained 62.60% of the variance and the first six principal components explained 92.70%. When PCA and hierarchical cluster analysis (HCA) results are evaluated; the parts of Salvia species root and aerial parts were determined that were not clearly separated and there was no regional grouping. In addition, Salvia species prepared as herbal tea was left to different simulated body fluid medium conditions, and the changes in metal contents were examined. It was determined that were taken up Cr, Cd, Pb, Cu, Zn metals in the simulated saliva fluid (SSF), Ni, Mn metals in the simulated gastric fluid (SGF), and Na, K metals in the simulated intestinal fluid (SIF). It was determined that Fe metal in almost all Salvia species was not taken from three simulated body fluid mediums. Thus, elements determined which were taken up in body fluid mediums.
Citation - WoS: 8
Citation - Scopus: 9
Synthesis and antioxidant, aggregation, and electronic properties of 6-tert-butyl-1,4-benzodioxine substituted phthalocyanines
(Turkish Journal of Chemistry, 2018) Ağırtaş, Mehmet Salih; Cabir, Beyza; Gümüş, Selçuk; Özdemir, Sadin; Dündar, Abdurrahman
As a starting material, 7-tert-butyldibenzo [b,e] [1,4] dioxine-2,3-dicarbonitrile was prepared by the reac- tion of 4-tert-butylcatechol with 4,5-dichlorophthalonitrile. Metallophthalocyanine complexes ( 4 { 7 ) were obtained by cyclotetramerization of 7-tert-butyldibenzo [b,e] [1,4] dioxine-2,3-dicarbonitrile. All compounds were characterized by elemental analysis and other spectroscopic methods (IR, UV/Vis, and 1 H NMR). Phthalocyanine compounds remained nonaggregated in tetrahydrofuran at the studied concentration ranges. Metallophthalocyanines ( 4 { 7 ) were tested for their antioxidant activities. The antioxidant activity processes included evaluation of radical-scavenging activity, chelat- ing activity, and reducing power. These compounds were compared to standard antioxidant ascorbic acid. The electronic data of the new compounds were obtained by computational calculations at the B3LYP/6-31G (d,p) level of theory.
Citation - WoS: 2
Citation - Scopus: 12
Study of Endogenous Paramagnetic Centers in Biological Systems From Different Areas
(Wiley, 2021) Nasibova, Aygun; Khalilov, Rovshan; Abiyev, Huseyn; Kavetskyy, Taras; Trubitsin, Boris; Keskin, Cumali; Eftekhari, Aziz
Plant leaves (Eldar pine (Pinus eldarica M.), fig (Ficus carica L.), and olive (Olea europaea L.)), collected in territories with different ecological conditions, of the Absheron Peninsula (Azerbaijan Republic) were studied by electron paramagnetic resonance spectroscopy (EPR). The generation of nanophase iron oxide magnetic particles in biological systems under the influence of stress factors was revealed. It was found that the process of biomineralization plays a role in the formation of biogenic iron oxide magnetic nanoparticles in plants and the generation of magnetite crystals in biological tissues, and stress factors have a stimulating effect on this phenomenon.
Removal of Reactive Black 5 (RB5) from Aqueous Solutionby Cross-Linked Magnetic Biosorbent
(2017) Tural; Tarhan; Tural;, Bilsen; Tuba; Servet;
The aim of this study is investigate to the equilibrium and kinetics of adsorption of anionic reactive dye in acid solutions. Chitosan was cross-linked using glutaraldehyde in the presence of magnetite.The adsorption capacity of Reactive Black 5(RB5)oncross-linked glutaraldehyde magnetic chitosan nanoparticles (GMCNs) was studied. During the studies, various essential factors influencing the adsorption, like adsorbate concentration and contact time have been monitored. The effect of pH value of solution on adsorption capacity was also investigated. The equilibrium was achieved within 17 h for the RB5 at pH 4, and the maximum sorption capacity calculated by applying the Langmuir equation to dye adsorption isotherm was357.1mg/g (C0 = 0.11-0.20 mM) for the RB5 at pH 4, 30 °C. The effect of initial dye concentration on the dynamical behaviors of the adsorption was measured. To determine the adsorption rates, the nonlinear first-order and second-order models were used. The second-order kinetic model fits well with the dynamical adsorption behavior of the RB5. The nanoparticles for the adsorption of the dye were regenerated efficiently through the alkaline solution and were then reused 10 times for dye removal
Citation - Scopus: 17
Basic Red 18 and Remazol Brilliant Blue R biosorption using Russula brevipes, Agaricus augustus, Fomes fomentarius
(Water Practice and Technology, 2022) Arslantaş, Ceren; M’barek, Islem; Saleh, Mohammed; Isik, Zelal; Ozdemire, Sadin; Dündar, Abdurrahman; Dizge, Nadir
In this study, the adsorption abilities of Russula brevipes (RB), Agaricus augustus (AA), and Fomes fomentarius (FF) were evaluated in Basic Red 18 (BR18) and Remazol Brilliant Blue R (RBBR) biosorption from textile effluent. The adsorbents were characterized via Scanning Electron Microscopy (SEM), Energy Dispersive Spectrometer (SEM-EDS), and Fourier transform infrared spectroscopy (FT/IR). Fomes fomentarius presented a low sorption capacity contrary to the two other fungi (RB and AA). RB and AA were selected as potential adsorbents for BR18 and RBBR, respectively. The maximum BR18 removal efficiencies for 10, 25, and 50 mg/L were obtained after 60 min to be 90, 88, and 86%, respectively. The RBBR adsorption efficiencies were 96.4, 96, and 90% for dye concentrations of 10, 25, and 50 mg/L. The adsorption of BR18 onto the RB biomass followed the Freundlich isotherm, while Langmuir is the best isotherm for RBBR sorption’s elucidation onto AA fungus biomass. The removal of BR18 by BR biomass was found to follow the pseudo-second order. In contrast, the adsorption of RBBR onto the AA biomass followed Lagergren’s pseudo-first order. For both adsorbents, the adsorption was exothermic, feasible, and spontaneous in nature. Finally, the dyes’ biosorption process was perfectly achieved onto fungi biomass via physisorption
Removal of hazardous azo dye reactive black 5 from aqueous solution by cross Linked magnetic biosorbent equilibrium and kinetic studies
(World Conference on Technology Innovation and Entrepreneurship, 2015) TARHAN; TURAL; TURAL; BOGA ;, TUBA; BİLSEN; SERVET; KENAN;
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