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Full-Text Articles in Entire DC Network
Investigation Of The Expression Levels Of Cdh1, Fhit, Pten, And Ttpal Genes In Colorectal Tumors, Evri̇m Suna Arikan Söylemez, Zafer Söylemez, Murat Çi̇lekar, Yüksel Arikan, Çi̇ğdem Tokyol, İbrahi̇m Hali̇l Kenger, Mustafa Solak
Investigation Of The Expression Levels Of Cdh1, Fhit, Pten, And Ttpal Genes In Colorectal Tumors, Evri̇m Suna Arikan Söylemez, Zafer Söylemez, Murat Çi̇lekar, Yüksel Arikan, Çi̇ğdem Tokyol, İbrahi̇m Hali̇l Kenger, Mustafa Solak
Turkish Journal of Medical Sciences
Background/aim: The main aim of the study is to assess expression levels of CDH1, FHIT, PTEN, and TTPAL genes in tumors and peripheral bloods of colorectal cancer patients in staged I-IV. Materials and methods: Gene expression analysis of related genes were performed for tumor tissues and peripheral blood samples of 51 colorectal cancer patients and colon tissues and blood samples of 5 healthy individuals. The real-time-PCR reaction method was used for the analysis. Results: Alteration of mRNA levels of related genes in tumor tissues of colorectal cancer cases was determined compared to control tissues. GAPDH and TBP were used for …
Developing The Nausea And Vomiting Thermometer Scale In Children With Cancer, Asli Akdeni̇z Kudubeş, Murat Bektaş
Developing The Nausea And Vomiting Thermometer Scale In Children With Cancer, Asli Akdeni̇z Kudubeş, Murat Bektaş
Turkish Journal of Medical Sciences
Background/aim: This study aimed to develop the Nausea and Vomiting Thermometer Scale (NVTS) in children with cancer. Materials and methods: This methodological study was conducted on 250 children with cancer at the research and training university hospital in Turkey between September 2019 and January 2020. The t-test, the ROC analysis, the Diagnostic index, and the Youden index were used for determining the scale of the cutting point. The regression analysis, the intra-class correlation coefficient, and the Bland- Altman analysis were used for the data analysis. Results: The scale-level content validity index was .94, which was coherent. As a result of …
Utility Of Etco2 To Predict Hemorrhagic Shock In Multiple Trauma Patients, Gülşen Öztürk Örmeci̇, Özlem Yi̇ği̇t, Oktay Eray
Utility Of Etco2 To Predict Hemorrhagic Shock In Multiple Trauma Patients, Gülşen Öztürk Örmeci̇, Özlem Yi̇ği̇t, Oktay Eray
Turkish Journal of Medical Sciences
Background/aim: For identifying hemorrhagic shock in trauma patients, some objective data are needed. The use of base excess (BE) and lactate values have been originated. In this study, it was aimed to determine the usability of end tidal carbon dioxide (ETCO2) in patients with multiple trauma for recognizing hemorrhagic shock. Materials and methods: Patients who were admitted to the emergency department between June 2019 and February 2020 with high- energy multiple trauma were included in the study. ETCO2 and BE values were measured. Correlation coefficients were calculated to determine correlations between ETCO2 and BE levels. Results: One hundred and twenty-two …
Factors That Affect Placental Retinol Transfer In Preterm Infants And Mothers With Retinoldeficiency, Kadi̇r Şerafetti̇n Tekgündüz, Di̇lara Di̇lek, Mustafa Kara, Nuri̇nni̇sa Öztürk, Si̇bel Ejder Tekgündüz
Factors That Affect Placental Retinol Transfer In Preterm Infants And Mothers With Retinoldeficiency, Kadi̇r Şerafetti̇n Tekgündüz, Di̇lara Di̇lek, Mustafa Kara, Nuri̇nni̇sa Öztürk, Si̇bel Ejder Tekgündüz
Turkish Journal of Medical Sciences
Background/aim: The retinol level and retinol delivery to the placenta may vary depending on various factors involving the mother and newborn. The present study evaluates the factors affecting retinol levels in newborns and the transplacental retinol passage in preterm newborns. Materials and methods: In this prospective cohort study, the retinol and retinol binding protein (RBP) in the umbilical cord blood of 44 preterm infants with a gestation age of
Circular Rna Circprmt5 Is Upregulated In Breast Cancer And Is Required For Cellproliferation And Migration, Xiaofeng Li, Dairong Zhang, Zuxi Feng, Xiangjing Xu, Jihong Zhang, Aiping Yu, Li Zhu, Jie Xiao, Junhua Du, Min Chen
Circular Rna Circprmt5 Is Upregulated In Breast Cancer And Is Required For Cellproliferation And Migration, Xiaofeng Li, Dairong Zhang, Zuxi Feng, Xiangjing Xu, Jihong Zhang, Aiping Yu, Li Zhu, Jie Xiao, Junhua Du, Min Chen
Turkish Journal of Medical Sciences
Background/aim: To evaluate the role of cyclic protein arginine methyltransferase 5 (circPRMT5) in the occurrence and development of breast cancer (BC). Materials and methods: A total of 90 BC patients who underwent radical mastectomy and 40 age-matched healthy female controls were recruited in the Second People's Hospital of China Three Gorges University, Yichang Second People's Hospital from 2017 to 2020. Quantitative reverse transcription polymerase chain reaction (RT-qPCR) was used to detect the expression levels of circPRMT5 in BC tissues, serum, normal breast cell line (MCF-10A), and BC cell line (T47D, MCF-7, BT549, Hs-578T, and MDA-MB-231, MDAMB-468). The associations between circPRMT5 …
Clinical And Imaging Findings Of Patients Diagnosed With Adenovirus-Positivepneumonia During 2015-2019 In Shanghai, China, Chunrong Huang, Dong Wei, Yahui Liu, Guo Chao Shi
Clinical And Imaging Findings Of Patients Diagnosed With Adenovirus-Positivepneumonia During 2015-2019 In Shanghai, China, Chunrong Huang, Dong Wei, Yahui Liu, Guo Chao Shi
Turkish Journal of Medical Sciences
Background/aim: This study was to describe the clinical characteristics, chest CT image findings, and potential role of T cells immunity in adenovirus positive pneumonia. Materials/methods: In this retrospective study, medical records of 53 adult Adv+ patients who were admitted to the Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, from May 2015 to August 2019 were included. The presence of adenovirus and other respiratory viruses was detected using polymerase chain reaction of throat swabs samples. Clinical features and chest computed tomography (CT) findings were compared between patients with Adv+ pneumonia and Adv+ non-pneumonia. Results: The top 3 most commonly …
Tp-E Interval, Tp-E/Qt, And Tp-E/Qtc Ratios In Patients With Primaryhyperparathyroidism And Their Relationship With Cardiac Arrhythmic Events, Yücel Yilmaz, Şaban Keleşoğlu, Ferhat Gökay, Yasi̇n Şi̇mşek
Tp-E Interval, Tp-E/Qt, And Tp-E/Qtc Ratios In Patients With Primaryhyperparathyroidism And Their Relationship With Cardiac Arrhythmic Events, Yücel Yilmaz, Şaban Keleşoğlu, Ferhat Gökay, Yasi̇n Şi̇mşek
Turkish Journal of Medical Sciences
Background/aim: Primary hyperparathyroidism (PHPT) is an endocrine disorder characterized by hypercalcemia caused by excessive parathyroid hormone (PTH) secretion from the parathyroid gland. PHPT was previously shown to increase cardiac arrhythmias. Besides, new indices, such as the Tpeak-Tend (Tp-e) interval, Tp-e interval/QT interval (Tp-e/QT) ratio, and Tp-e interval/corrected QT interval (Tp-e/QTc) ratio may be associated with ventricular arrhythmias and sudden cardiac death. Therefore, we aimed to investigate the relationship between PHPT and the changes to Tp-e interval, Tp-e/QT ratio, and Tp-e/QTc ratio. Materials and methods: We carried out the study with 41 patients with PHPT and 40 control subjects. We calculated …
The Impact Of Bone Marrow-Derived Mesenchymal Stem Cells On Experimental Testiculartorsion In Rats, Ahmet Ertürk, Sabri̇ Demi̇r, Yasemi̇n Dere Günal, Mehmet Zengi̇n, Mi̇yase Çinar, Di̇nçer Yildiz, Si̇yami̇ Karahan, Emrah Şenel
The Impact Of Bone Marrow-Derived Mesenchymal Stem Cells On Experimental Testiculartorsion In Rats, Ahmet Ertürk, Sabri̇ Demi̇r, Yasemi̇n Dere Günal, Mehmet Zengi̇n, Mi̇yase Çinar, Di̇nçer Yildiz, Si̇yami̇ Karahan, Emrah Şenel
Turkish Journal of Medical Sciences
Background/aim: The aim of this study was to investigate the healing effects of bone marrow-derived mesenchymal stem cells (BMMSCs) on experimental testicular torsion in rats. Materials and methods: Three groups consisting of 10 Wistar albino rats were created. In Group I, the left testicle was explored and relocated in the scrotum without any attempt to modify it. In Group II, the left testicle underwent torsion for three h and then was detorsed and relocated. In Group III, in addition to torsion and detorsion, BM-MSCs were administered intratesticularly. The rats were sacrificed on the seventh day, and the healing status of …
Irisin Relaxes Rat Thoracic Aorta Through Inhibiting Signaling Pathways Implicatingprotein Kinase C, Sadetti̇n Demi̇rel, Serdar Şahi̇ntürk, Naci̇ye İşbi̇l, Fadil Özyener
Irisin Relaxes Rat Thoracic Aorta Through Inhibiting Signaling Pathways Implicatingprotein Kinase C, Sadetti̇n Demi̇rel, Serdar Şahi̇ntürk, Naci̇ye İşbi̇l, Fadil Özyener
Turkish Journal of Medical Sciences
Background/aim: Irisin, a newly identified exercise-derived myokine, has been found involved in a peripheral vasodilator effect. However, little is known regarding the potential vascular activity of irisin, and the mechanisms underlying its effects on vascular smooth muscle have not been fully elucidated. This study was aimed to investigate the effects of irisin on vascular smooth muscle contractility in rat thoracic aorta, and the hypothesis that protein kinase C (PKC) may have a role in these effects. Materials and methods: Isometric contraction-relaxation responses of thoracic aorta rings were measured with an isolated organ bath model. The steady contraction was induced with …
Striatal Dopaminergic Neurons As A Potential Target For Gdnf Based Ischemic Stroke Therapy, Mustafa Çağlar Beker, Merve Beker, Ahmet Burak Çağlayan, Busenur Bolat, Ülkan Kiliç, Gamze Köse, Ertuğrul Kiliç
Striatal Dopaminergic Neurons As A Potential Target For Gdnf Based Ischemic Stroke Therapy, Mustafa Çağlar Beker, Merve Beker, Ahmet Burak Çağlayan, Busenur Bolat, Ülkan Kiliç, Gamze Köse, Ertuğrul Kiliç
Turkish Journal of Medical Sciences
Background/aim: Glial cell-line-derived neurotrophic factor (GDNF) is a well-known regulatory neurotrophic factor on dopaminergic neurons. Several pathologies have been documented so far in case of any impairment in the dopaminergic system. This study aimed to investigate the potential protective role of lentiviral GNDF delivery on the small population of tyrosine hydroxylase (TH) positive dopamine producing striatal neurons after ischemic stroke. Materials and methods: Fourteen C57BL/6J male mice (8-10 weeks) were intracerebrally treated with lentiviral GDNF (Lv-GDNF) or vehicle. Ten days after injections, cerebral ischemia was induced by blockage of the middle cerebral artery. Animals were terminated 72 h after ischemia, …
Modulatory Effect Of Resveratrol And Melatonin On Natural Killer Cell Activity And Adrenomedullin In Diabetic Rats, Fati̇h Özçeli̇k, Fati̇h Hacimustafaoğlu, Alpaslan Tanoğlu
Modulatory Effect Of Resveratrol And Melatonin On Natural Killer Cell Activity And Adrenomedullin In Diabetic Rats, Fati̇h Özçeli̇k, Fati̇h Hacimustafaoğlu, Alpaslan Tanoğlu
Turkish Journal of Medical Sciences
Background/aim: Epidemiological evidence suggests that diabetes poses a high risk for many chronic diseases, especially cardiovascular diseases, and cancer by stimulating many inflammatory and immunological pathogenic mediators and affecting natural killer (NK)-cell activity. In this study, the effects of melatonin and resveratrol on IL-6, TNF-alpha, oxidant/antioxidant capacity, NK-cell activity, and mid-regional proadrenomedullin (MR-proADM) levels of diabetic rats were investigated. Materials and methods: In the study, 28 Sprague Dawley rats were randomly divided into the control group (group I) and 3 streptozotocin- induced diabetes mellitus (DM) groups (group II, III, and IV), each group consisting of 7 rats. Five mg/kg/day melatonin …
Morphometric Analysis Of Hippocampus And Intracranial Formations Based On Their Stages In Patients Diagnosed With Major Cognitive Disorder, Nurullah Yücel, Muzaffer Şeker, Mehmet Tuğrul Yilmaz, Zaki̇r Sakci, Yaşar Bükte
Morphometric Analysis Of Hippocampus And Intracranial Formations Based On Their Stages In Patients Diagnosed With Major Cognitive Disorder, Nurullah Yücel, Muzaffer Şeker, Mehmet Tuğrul Yilmaz, Zaki̇r Sakci, Yaşar Bükte
Turkish Journal of Medical Sciences
No abstract provided.
Does Memantine Show Chemopreventive Effect Against Mice 4t1 Breast Tumor Model?, Gülşah Albayrak, Eli̇f Burcu Bali̇, Funda Demi̇rtaş Korkmaz, Emi̇n Ümi̇t Bağriaçik
Does Memantine Show Chemopreventive Effect Against Mice 4t1 Breast Tumor Model?, Gülşah Albayrak, Eli̇f Burcu Bali̇, Funda Demi̇rtaş Korkmaz, Emi̇n Ümi̇t Bağriaçik
Turkish Journal of Medical Sciences
No abstract provided.
Critical Dynamics In Biological Boolean Networks Follows From Symmetric Response To Input Genes, Hamza Çoban, Alkan Kabakçioğlu
Critical Dynamics In Biological Boolean Networks Follows From Symmetric Response To Input Genes, Hamza Çoban, Alkan Kabakçioğlu
Turkish Journal of Physics
A recent observation on an extensive collection of biological gene regulatory networks suggests that the regulatory dynamics is tuned to remain close to the order-chaos boundary in the Lyapunov sense [1]. We here investigate, from a mathematical perspective, the structural/functional constraints which give rise to such accumulation around criticality in these systems. While the role of canalizing functions in this respect is well established, we find that critical sensitivity to small input variations also follows from an over-abundance of symmetrical inputs, i.e. regulatory genes invoking identical or complementary responses on their common target. A random network ensemble constructed to have …
Favorable Efficacy Of Adalimumab Treatment In Experimental Acute Pancreatitis Model, Başak Çakir Güney, Alpaslan Tanoğlu, Murat Yeni̇çeri̇, Zafer Çirak, Ayşe Gökçen Sade, Yeşi̇m Önal Taştan, Zeli̇ha Seri̇ndağ, Mustafa Kaplan
Favorable Efficacy Of Adalimumab Treatment In Experimental Acute Pancreatitis Model, Başak Çakir Güney, Alpaslan Tanoğlu, Murat Yeni̇çeri̇, Zafer Çirak, Ayşe Gökçen Sade, Yeşi̇m Önal Taştan, Zeli̇ha Seri̇ndağ, Mustafa Kaplan
Turkish Journal of Medical Sciences
Background/aim: Acute pancreatitis is a clinical picture with a wide range of symptoms from mild inflammation to multiorgan failure and death. The aim of this study is to investigate the effects of Adalimumab (ADA) on inflammation and apoptosis in a cerulein-induced acute pancreatitis model in rats. Material and methods: Experimental cerulein-induced acute pancreatitis model was created by applying 4 intraperitoneal cerulein injections at 1-h intervals. A total of 40 rats, 8 in each group, were randomly distributed into five groups. In the groups that ADA treatment was given, two different doses of ADA were administered 5 mg/kg and 20 mg/kg …
First Determination Of Anticancer, Cytotoxic, And In Silico Adme Evaluation Of Secondarymetabolites Of Endemic Astragalus Leucothrix Freyn & Bornm, Ayşe Şahi̇n Yağlioğlu, Duygu Güneş Gürbüz, Melda Dölarslan, İbrahi̇m Demi̇rtaş
First Determination Of Anticancer, Cytotoxic, And In Silico Adme Evaluation Of Secondarymetabolites Of Endemic Astragalus Leucothrix Freyn & Bornm, Ayşe Şahi̇n Yağlioğlu, Duygu Güneş Gürbüz, Melda Dölarslan, İbrahi̇m Demi̇rtaş
Turkish Journal of Chemistry
Isolation and characterization of anticancer activity guided secondary metabolites of endemic Astragalus leucothrix Freyn& Bornm were aimed. Aerial parts of the plant were extracted by maceration method in the solvent system methanol-chloroform (1 : 1) at room temperature. The obtained crude extract was dissolved in purified water. Then, the extract was partitioned with n-hexane, chloroform, ethyl acetate, and n-butanol, respectively. Anticancer activity tests of all the fractions were performed against HeLa and C6 cancer cells. The chloroform fraction that has highest anticancer activity was subjected to chromatographic methods such as column chromatography and thin layer chromatography. Pentyl tetratetracontanoate (1), alfalone …
Synthesis Of Benzoyl Hydrazones Having 4-Hydroxy-3,5-Dimethoxy Phenyl Ring, Theirbiological Activities, And Molecular Modeling Studies On Enzyme Inhibition Activities, Bedri̇ye Seda Kurşun Aktar, Yusuf Sicak, Gi̇zem Tatar, Emi̇ne Elçi̇n Emre
Synthesis Of Benzoyl Hydrazones Having 4-Hydroxy-3,5-Dimethoxy Phenyl Ring, Theirbiological Activities, And Molecular Modeling Studies On Enzyme Inhibition Activities, Bedri̇ye Seda Kurşun Aktar, Yusuf Sicak, Gi̇zem Tatar, Emi̇ne Elçi̇n Emre
Turkish Journal of Chemistry
Hydrazone compounds have high capacity in terms of antioxidant activity and enzyme inhibition activities such as anticholinesterase, tyrosinase, and urease. In this study, benzoyl hydrazones compounds (7a-7m) were synthesized starting from 3,5-dimethoxy-4-hydroxybenzaldehyde. Antioxidant activity of the synthesized compounds was evaluated. In the β-carotene-linoleic acid and ABTS cation radical scavenging activities, compounds 7j, 7e, and 7m stood out as the most active compounds, respectively. In the anticholinesterase enzyme inhibition activity results, compound 7f exhibited the best activity against AChE and BChE enzymes in the synthesis series. In addition, molecular docking analysis was performed to understand the inhibition mechanism of the synthesized …
Chromatographic Evaluation Of Tocols And Sterols Of Processed Canola Oil And Deodorizerdistillate, Hadia Shoaib, S. Tufail Sherazi, Saba Naz, Dr Sarfaraz Ahmed Mahesar, Abdul Rauf Khaskheli, Siraj Uddin, Ahmed Raza Sidhu, Hami̇de Fi̇li̇z Ayyildiz, Hüseyi̇n Kara, Mustafa Topkafa
Chromatographic Evaluation Of Tocols And Sterols Of Processed Canola Oil And Deodorizerdistillate, Hadia Shoaib, S. Tufail Sherazi, Saba Naz, Dr Sarfaraz Ahmed Mahesar, Abdul Rauf Khaskheli, Siraj Uddin, Ahmed Raza Sidhu, Hami̇de Fi̇li̇z Ayyildiz, Hüseyi̇n Kara, Mustafa Topkafa
Turkish Journal of Chemistry
Tocopherols and tocotrienols in the combined form are known as tocols. Changes of total and individual tocols and sterols concentration of canola oil and deodorizer distillate (DD) during different processing stages were evaluated with the application of gas chromatography (GC) and high-performance liquid chromatography (HPLC). For sterols analysis, GC coupled with flame ionization detector (FID) was used while tocols in canola oil samples and DD, normal phase (NP) HPLC was applied. The results of the present study indicated that levels of total and individual tocols and sterols content were decreased during processing (neutralization to deodorization). Deodorization was found to be …
Effect Of Poly(Ethylene-Vinyl Acetate) Pour Point Depressant On The Cold Flow Properties And Crystallization Behavior Of Soybean Biodiesel Blends Fuel, Jinbao Liu, Chunhua Wang, Qian Liu, Fen Zhang, Xiaojie Liu, Min Sun
Effect Of Poly(Ethylene-Vinyl Acetate) Pour Point Depressant On The Cold Flow Properties And Crystallization Behavior Of Soybean Biodiesel Blends Fuel, Jinbao Liu, Chunhua Wang, Qian Liu, Fen Zhang, Xiaojie Liu, Min Sun
Turkish Journal of Chemistry
Although biodiesel-diesel blends are being widely used in diesel engines, investigations on its cold flow properties and crystallization behavior are still scarce. In this paper, poly(ethylene-vinyl acetate) (PEVA) pour point depressant and petroleum diesel were worked together to enhance the cold flow properties of soybean biodiesel. PEVA presented a better positive effect in reducing the cold filter plugging point (CFPP) of biodiesel blends. B40 treated with 1% PEVA exerted the best cold flow properties, and its CFPP was decreased by -14 °C. In addition, the crystallization behavior was changed variously. The sizes of crystals were decreased as well as the …
A Simple And Rapid Rp-Hplc Method For The Assessment Of Cobalamin (Vitamin B12) Intilapia And Snoek Fishes, Labaran Ibrahim, Aminu Usman
A Simple And Rapid Rp-Hplc Method For The Assessment Of Cobalamin (Vitamin B12) Intilapia And Snoek Fishes, Labaran Ibrahim, Aminu Usman
Turkish Journal of Chemistry
This study developed a rapid reversed-phase high-performance liquid chromatography (RP-HPLC) method equipped with a UV-Vis detector. The aquaponics system?s tilapia and marine snoek fishes were extracted using an autoclaving process and enzymatic treatment. The technique enabled the separation and quantification of cobalamin present in these fishes extracts. Phenomenex Luna® 5 μm C18 (2) 100 A LC-column (150 × 4.6 mm) was used as a stationary phase, while the mobile phase consisted of methanol and phosphoric acid in a ratio of 35:65 (v/v), respectively. The developed method was revealed to be rapid (a retention time of less than 5.0 min), linear …
Clerodendrum Serratum Extract Attenuates Production Of Inflammatory Mediators Inovalbumin-Induced Asthma In Rats, Poonam Arora, Shahid Hamid Ansari, Lalit Mohan Nainwal
Clerodendrum Serratum Extract Attenuates Production Of Inflammatory Mediators Inovalbumin-Induced Asthma In Rats, Poonam Arora, Shahid Hamid Ansari, Lalit Mohan Nainwal
Turkish Journal of Chemistry
In the present study, ethanolic extract of Clerodendrum serratum roots was investigated for its potential to reverse some features of bronchial asthma in ovalbumin-induced murine model of asthma. Clerodendrum serratum commonly called bharangi, (family Solanaceae) is a well-known anti-allergic drug in Asian folk system of medicines. In the present work, pharmacological studies are done to provide scientific evidence for therapeutic potential of plant in allergic asthma. Asthma was induced in experimental rats with allergen suspension of ovalbumin and aluminum hydroxide followed by treatment with dexamethasone (2.5 mg/kg, po) or C. serratum root extract (0.53 and 5.3 mg/kg, b. w., po). …
Synthesis, Predictions Of Drug-Likeness, And Pharmacokinetic Properties Of Some Chiral Thioureas As Potent Enzyme Inhibition Agents, Yusuf Sicak
Turkish Journal of Chemistry
A series of chiral thioureas (1 - 17) were synthesized from and tested for their anticholinesterase, tyrosinase, and urease enzyme inhibitor activities. Various phenylisothiocyanates were added to solution of L-cysteine in methanol: water (1 : 1 v / v) at room temperature and stirred for 24 h. The precipitated solid was recrystallized from n-butanol. Pure compounds were characterized by NMR (1H and 13C), FTIR, and CHNS. Tertiary amine containing N-(4-(diethylamino)phenyl)-N'-(2-mercapto-carboxyethanyl)thiourea 17, N-(4-(dimethylamino)phenyl)-N'-(2-mercapto-carboxyethanyl)thiourea 16 and trimethoxy containing N-(3,4,5-trimethoxyphenyl)-N'-(2-mercapto-carboxyethanyl)thiourea 14 were more active than galantamine against AChE and BChE enzymes. In tyrosinase enzyme inhibition activity, compound 14, 10, 12, 6, 13, and …
Induction Of Lutein Production In Scenedesmus Obliquusunder Different Culture Conditions Prior To Its Semipreparative Isolation, Ayşegül Erdoğan, Ayça Büşra Karataş, Zeli̇ha Demi̇rel, Meltem Dalay
Induction Of Lutein Production In Scenedesmus Obliquusunder Different Culture Conditions Prior To Its Semipreparative Isolation, Ayşegül Erdoğan, Ayça Büşra Karataş, Zeli̇ha Demi̇rel, Meltem Dalay
Turkish Journal of Chemistry
Microalgae with their improved growth rates and accumulation of high-value-added products make their commercial production attractive. Among them, lutein, which is a carotenoid, plays a very important role due to its various applications in the food and pharmaceutical industry. Induction of its biosynthesis can be triggered by various stress conditions like light. In this study, three different light intensities (50,150 and 300 μmol photons/m2s) and aeration rates (1, 3, and 5 L/min) were utilized to induce the lutein biosynthesis and biomass productivity in Scenedesmus obliquus. Lutein was isolated by preparative chromatography using a semiprep C30 column (10 × 250 mm, …
Electroanalytical Investigation And Voltammetric Quantification Of Antiviral Drug Favipiravir In The Pharmaceutical Formulation And Urine Sample Using A Glassy Carbon Electrode In Anionic Surfactant Media, Zeynep Akca, Hande İzem Özok, Yavuz Yardim, Zühre Şentürk
Electroanalytical Investigation And Voltammetric Quantification Of Antiviral Drug Favipiravir In The Pharmaceutical Formulation And Urine Sample Using A Glassy Carbon Electrode In Anionic Surfactant Media, Zeynep Akca, Hande İzem Özok, Yavuz Yardim, Zühre Şentürk
Turkish Journal of Chemistry
This work describes the electrochemical investigation of a promising antiviral agent, favipiravir (FAV) utilizing a nonmodified glassy carbon (GC) electrode, along with a unique voltammetric approach that can determine FAV with a good degree of accuracy, speed, and cost-effectiveness. Using cyclic voltammetry, the compound demonstrated a single well-defined and an irreversible oxidation peak at approximately +1.12 V (vs. Ag/AgCl) in Britton-Robinson (BR) buffer at pH 10.0. The synergistic effect of anionic surfactant, sodium dodecyl sulfate (SDS) on the adsorption ability of GC electrode remarkably increased the sensitivity of the stripping voltammetric measurements of FAV. Employing square-wave adsorptive stripping voltammetry at …
Boric Acid And Schiff Base-Based Fluorescent Sensor For Detection Of L-Tryptophan In Milk And Bsa Samples, Ümran Duru Kamaci, Musa Kamaci
Boric Acid And Schiff Base-Based Fluorescent Sensor For Detection Of L-Tryptophan In Milk And Bsa Samples, Ümran Duru Kamaci, Musa Kamaci
Turkish Journal of Chemistry
In the present paper, the fluorescence sensor based on Schiff base and boric acid was developed for easy and rapid detection of L-tryptophan in different samples such as milk and bovine serum albumin. The photoluminescence intensity was measured by using fluorescent measurements and the results indicated that the developed fluorescent sensor was exhibited selective, sensitive, reliable determination against L-tryptophan, and a series of various analytes such as cations, amino acids, and organic compounds were used to investigate the selectivity of the fluorescent chemosensor. The limit of detection and linear range of the chemosensor were calculated as 0.82 μM, and 0.1?500 …
Synthesis And Investigation Of Antiproliferative Activity Of Ru-Nhc Complexes Against C6 And Hela Cancer Cells, Ramazan Paşahan, Mi̇tat Akkoç, Şeyma Yaşar, Tuğba Kul Köprülü, Şaban Teki̇n, Sedat Yaşar, İsmai̇l Özdemi̇r
Synthesis And Investigation Of Antiproliferative Activity Of Ru-Nhc Complexes Against C6 And Hela Cancer Cells, Ramazan Paşahan, Mi̇tat Akkoç, Şeyma Yaşar, Tuğba Kul Köprülü, Şaban Teki̇n, Sedat Yaşar, İsmai̇l Özdemi̇r
Turkish Journal of Chemistry
The 2-methylpyridine, 2-diethylaminoethyl, and isopentyl linked a series of symmetric and unsymmetric benzimidazolium salts 2a-e were prepared and used in the synthesis of silver-N-heterocyclic carbene (NHC) complexes (3a-e). The Ru(II)-NHC complexes (4a-h) were synthesized via transmetalation reaction from 3a-e. 4a-h complexes were converted to Ru(II)-NHC.HCl complexes (5ah) by HCl solution of diethyl ether and characterized by different spectroscopic techniques such as 1H and 13C NMR, LC/MS-Q-TOF, FT-IR, elemental analysis, and melting point detection. We examined the effect of the structural difference of complexes on anticancer activity via different arenes and metal centers. Antiproliferative activity of 5a-h and 3a was tested …
Intake Of Divalent Copper And Nickel Onto Natural Zeolite From Aqueous Solutions: A Study In Mono- And Dicomponent Systems, Burak Teki̇n, Ünsal Açikel
Intake Of Divalent Copper And Nickel Onto Natural Zeolite From Aqueous Solutions: A Study In Mono- And Dicomponent Systems, Burak Teki̇n, Ünsal Açikel
Turkish Journal of Chemistry
In this study, the noncompetitive and competitive adsorption process of copper (II) and nickel (II) ions on the natural zeolite were examined in simulated wastewater in a batch system with respect to concentration, pH and temperature. Optimum pH values were found as 5,0 for adsorption of copper and nickel ions on the zeolite. The effect of initial concentration and ambient temperature on the yield of adsorption was examined at this pH value. The equilibrium adsorption data of Cu (II) and Ni (II) onto the zeolite were analyzed by the Langmuir's and Freundlich's isotherms, and the experimental metal uptake data fitted …
Impacts Of Some Metal Ions On Glutathione S-Transferase In The Liver Of Chalcalburnus Tarichi: An Endemic Species Of Lake Van, Muhammet Serhat Özaslan, Mehmet Çi̇ftci̇
Impacts Of Some Metal Ions On Glutathione S-Transferase In The Liver Of Chalcalburnus Tarichi: An Endemic Species Of Lake Van, Muhammet Serhat Özaslan, Mehmet Çi̇ftci̇
Turkish Journal of Chemistry
Glutathione-S-transferase (GSTs) is a multifunctional enzyme that provides homeostasis by catalyzing the first step of the formation of mercapturic acid, the end product in detoxification metabolism. They can prevent reactive electrophilic compounds from harming the body by covalently binding the same type of compounds to each other. In this study, we determined the in vitro inhibitory effects of metal ions such as Cu2+, Cd2+, Ag+, and Co2+ on GST enzyme activity. For this aim, GST was purified from C. tarichi Pallas liver with 37.36% yield and 29.304 EU/mg specific activity using the chromatographic method. The Vmax values of liver GST …
Photocatalytic Degradation Of Aquatic Organic Pollutants With Zn- And Zr-Based Metalorganic Frameworks: Zif-8 And Uio-66, Fatma Defne Çalik, Bi̇lgesu Erdoğan, Esra Yilmaz, Gi̇zem Saygi, Seher Fehi̇me Çakicioğlu Özkan
Photocatalytic Degradation Of Aquatic Organic Pollutants With Zn- And Zr-Based Metalorganic Frameworks: Zif-8 And Uio-66, Fatma Defne Çalik, Bi̇lgesu Erdoğan, Esra Yilmaz, Gi̇zem Saygi, Seher Fehi̇me Çakicioğlu Özkan
Turkish Journal of Chemistry
Water treatment has been an essential issue with the increasing population over 40 years. Researchers center on the major organic pollutants, such as dyes, pesticides, and pharmaceutical products. Photocatalytic degradation is one of the promising methods for aquatic organic pollutant treatment. Over the years, scientists have been working on developments for photocatalysts to enhance their pollutant degradation performances. From the reviewed studies, it is seen that properties like surface area, chemical, mechanical, and thermal stability, and uniform distribution of active sites are crucial, and an increase in these properties provides better degradation efficiency. In this sense, metal-organic frameworks as photocatalysts …
Interaction Of The Nitrogen-Containing Carbon Backbone Polymers With Essential Α-Amino Acids, Andrey Sorokin, Maria Lavlinskaya
Interaction Of The Nitrogen-Containing Carbon Backbone Polymers With Essential Α-Amino Acids, Andrey Sorokin, Maria Lavlinskaya
Turkish Journal of Chemistry
The aim of this work is to research the interactions of water-soluble nitrogen-containing copolymers with essential amino acids in aqueous media. For this, poly(N-vinylformamide-co-N-vinylimidazole) and poly(N-vinylcaprolactam-co-N-vinylimidazole) random copolymers were synthesized by free radical polymerization. The products obtained are characterized by GPC, DLS, and FTIR. The copolymers have a narrow molecular weight distribution and low dispersity. The interactions of the obtained copolymers with histidine, proline, arginine, leucine, phenylalanine, and methionine were researched by UV spectroscopy, FTIR, and TEM. It was found that conjugation of the copolymers with amino acids correlates with the copolymer …