Hans Laufer, Neslihan Demir, William J. Biggers, Hans Laufer, Neslihan Demir, William J. Biggers,
Shell disease is a problem affecting lobsters in eastern Long Island Sound causing disfiguration of the shell, decreasing the lobsters' value, and whereas mild and medium levels of the disease are not lethal, ultimately, severe cases result in mortality. Levels of the molting hormone, ecdysone, were quantitated, using a radioimmunoassay (RIA), in hemolymph of animals exhibiting shell disease. Our results indicate that levels of ecdysone were increased in the hemolymph of shell-diseased lobsters, ...
Tópico(s): Coral and Marine Ecosystems Studies
2005 - National Shellfisheries Association | Journal of Shellfish Research
Hasan Kaya, Ekrem Şanver Çelik, Sevdan Yılmaz, Arınç Tulgar, Mehmet Akbulut, Neslihan Demir,
Tópico(s): Fish Ecology and Management Studies
2014 - Springer Science+Business Media | Comparative Clinical Pathology
Hans Laufer, Ming Chen, Michael Johnson, Neslihan Demir, James M. Bobbitt,
Alkylphenols, anthropogenic estrogenic endocrine disruptors in vertebrates, have been found in lobsters (Homarus americanus) in New England sites. We hypothesize that alkylphenols interfere in the shell hardening during molting. We used an in vitro cuticle bioassay to investigate the effects of 2 alkylphenolic compounds—2,4-bis-(dimethylbenzyl) phenol (compound 3) and bisphenol A (BPA; 4,4′-dihydroxy-2,2-diphenylpropane (also referred to as 4,4′-(propan-2-ylidene) diphenol)) on tyrosine incorporation ...
Tópico(s): Environmental Toxicology and Ecotoxicology
2012 - National Shellfisheries Association | Journal of Shellfish Research
Gönül Yapar, Neslihan Demir, Aşkın Kiraz, Gözde Yalçın, Mustafa Yıldız,
In this study, bis-carbonyl podand (triethylene glycol bis(2-carbonylphenyl)ether) (1) was synthesized from the reaction of triethylene glycol dichloride with salicylaldehyde. Then, Schiff base podans (2 and 3) were prepared from the interaction of bis(carbonyl) podand with 2-amino-4-methylphenol and 2-amino-3-hydroxypyridine in ethanol medium. The structures of podands have been investigated by elementary analysis, FT-IR, UV-Vis, 1H-NMR, 13C-NMR and MS spectroscopy. The antimicrobial activities of ...
Tópico(s): Synthesis and biological activity
2022 - Elsevier BV | Journal of Molecular Structure
Neslihan Demir, Keziban Atacan, Mustafa Özmen, Salih Zeki Baş,
Synthetic route for the MoS 2 –TiO 2 /rGO nanocomposite and the electrode reaction for paracetamol.
Tópico(s): Conducting polymers and applications
2020 - Royal Society of Chemistry | New Journal of Chemistry
Behiye Şenel, Neslihan Demir, Gülay Büyükköroğlu, M. Yıldız,
We report the synthesis and applications of a novel N-doped graphene quantum dots (GQDs) using hydrothermal reaction between citric acid and p-aminophenol. The synthesized N-doped GQDs have been characterized physico-chemically and evaluated its antioxidant, antimicrobial, DNA binding and cleavage activities. siRNA loading studies were performed and their effects on cells were evaluated. Obtained results indicate that monodisperse solution of N-doped GQDs has been obtained with particles size ca. ∼ ...
Tópico(s): Nanocluster Synthesis and Applications
2019 - Elsevier BV | Saudi Pharmaceutical Journal
Gökhan Alpaslan, Bahadır Boyacıoğlu, Neslihan Demir, Yasemin Tümer, Gönül Yapar, Nuray Yıldırım, Mustafa Yıldız, Hüseyin Ünver,
A new Schiff base, (E)-3,5-dimethoxy-2-((6-methoxybenzo[d]thiazol-2-ylimino)methyl)- phenol, was prepared from the reaction of 2-amino-6-methoxybenzothiazole and 2-hydroxy-4,6-dimethoxybenzaldehyde and characterized with elemental analysis, FTIR, UV-VIS, NMR and single crystal X-ray diffraction techniques. Frontier molecular orbitals, molecular electrostatic potential, and chemical reactivity descriptors of the synthesized compound were studied using molecular modeling methods. The antibacterial ...
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2018 - Elsevier BV | Journal of Molecular Structure
Mustafa Yıldız, Neslihan Demir, Hüseyin Ünver, Nurettin Şahiner,
A novel colorimetric cation sensor based on polyethyleneiminehydrochloride (PEI.HCl) as Schiff base was synthesized. The molecular structure of the PEI.HCl-Schiff base was characterized via FT-IR, 1H NMR, 13C NMR, LC-MS and UV–vis spectroscopic methods The chromogenic sensing ability of PEI.HCl-Schiff base was investigated with colorimetric and UV–vis spectroscopy. The designed sensor exhibited highly selective recognition for Fe2+, Co2+, Cu2+, Cr3+, and Fe3+ amongst a wide range of metal ions tested ...
Tópico(s): Antimicrobial agents and applications
2017 - Elsevier BV | Sensors and Actuators B Chemical
Hüseyin Ünver, Bahadır Boyacıoğlu, Celal Tuğrul Zeyrek, Mustafa Yıldız, Neslihan Demir, Nuray Yıldırım, Oğuzhan Karaosmanoğlu, Hülya Sivas, Ayhan Elmalı,
We report the synthesis of a novel Schiff base (E)-3-[(3,5-bis(trifluoromethyl) phenylimino)methyl] benzene-1,2-diol from the reaction of 2,3-dihydroxybenzaldehyde with 3,5-bis(trifluoromethyl)aniline, and its Ni(II) and Cu(II) complexes. The molecular structure of the Schiff base was experimentally determined using X-ray single-crystal data and was compared to the structure predicted by theoretical calculations using density functional theory (DFT), Hartree-Fock (HF) and Möller–Plesset second-order ...
Tópico(s): DNA and Nucleic Acid Chemistry
2016 - Elsevier BV | Journal of Molecular Structure
Mustafa Yıldız, Özge Karpuz, Celal Tuğrul Zeyrek, Bahadır Boyacıoğlu, Hakan Dal, Neslihan Demir, Nuray Yıldırım, Hüseyin Ünver,
Synthesis, biological activity, spectroscopic and crystallographic characterization and density functional theory (DFT) studies of the Schiff base 3,5-bis(triflouromethyl)aniline and salicylaldehyde are reported. It crystallizes as a monoclinic space group P21/c with a = 7.7814(3) Å, b = 26.8674(9) Å, c = 7.4520(2) Å, V = 1379.98(8), Z = 4, Dc = 1.6038 g cm−3, and μ = 0.156 mm−1. The molecular structure obtained from X-ray single-crystal analysis of the investigated compound in the ground state was compared using ...
Tópico(s): Crystal structures of chemical compounds
2015 - Elsevier BV | Journal of Molecular Structure
Asiye Kanbay, Neslihan Demir, Nuri Tutar, Osman Köstek, Zuhal Şimşek, Hakan Büyükoğlan, Ramazan Demir, Liborio Parrino,
Cognitive impairment is common among patients with obstructive sleep apnea syndrome (OSAS). In this study, we aimed to investigate the effect of continuous positive airway pressure (CPAP) therapy on serum insulin-like growth factor-1 (IGF-1) levels and cognitive functions in patients with OSAS.Thirty-three patients with newly diagnosed OSAS and 17 healthy-control subjects enrolled in the study. All individuals completed the mini-mental state examination (MMSE) to evaluate cognitive function. Blood samples ...
Tópico(s): Sleep and Wakefulness Research
2015 - Wiley | The Clinical Respiratory Journal
Hans Laufer, Neslihan Demir, Xuejun Pan, James D. Stuart, Jonna Ahl,
Adult male crayfish Procambarus clarkii exist in two morphotypes. They continue to molt as adults, switching between Form Is and Form IIs. Form Is are primary reproductive types, with large chelae and spines on the ischiopodites of the third and fourth pair of walking legs. Form IIs are non-reproductive types with smaller chelae and no spines on the ischiopodites. We investigated the hormonal control of these transitions in two ways, by eyestalk ablation and by methyl farnesoate (MF) treatments. ...
Tópico(s): Crustacean biology and ecology
2005 - Elsevier BV | Journal of Insect Physiology
Fadime Canbolat, Neslihan Demir, Özlem Tonguç Yayıntaş, Melek Pehli̇van, Aslı Eldem, Tülay Kılıçaslan Ayna, Mehmet Şenel,
Background: Multiple drug-delivery systems obtained by loading nanoparticles (NPs) with different drugs that have different physicochemical properties present a promising strategy to achieve synergistic effects between drugs or overcome undesired effects. This study aims to develop a new NP by loading quercetin (Que) and valproic acid (VPA) into chitosan. In this context, our study investigated the antioxidant activities of chitosan NPs loaded with single and dual drugs containing Que against oxidative ...
Tópico(s): Histone Deacetylase Inhibitors Research
2024 - Multidisciplinary Digital Publishing Institute | Biomedicines
Cesarettin Alasalvar, Asli Odabasi, Neslihan Demir, Murat Ö. Balaban, Fakhri Shahidi, Keith R. Cadwallader,
2004 - Wiley | Journal of Food Science
Tamer H. Coskun, Fatih İlhan, Neslihan Manav Demır, Eyüp Debik, Uğur Kurt,
Abstract In this study, the electrocoagulation process was evaluated as a pretreatment process for olive mill wastewaters. Aluminium (Al) and iron (Fe) electrodes, several contact times and 0.5, 1 and 2 A currents were used to compare chemical oxygen demand (COD) removal efficiencies for each case. The optimum contact time and current were 45 minutes and 1 A, respectively, which resulted in a COD removal of 58.7% with an Al electrode. Experimental data from distinct operational conditions were used ...
Tópico(s): Electrochemical Analysis and Applications
2011 - Taylor & Francis | Environmental Technology
Tamer H. Coskun, Eyüp Debik, Neslihan Manav Demır,
Treatment of olive mill wastewaters (OMW) by membrane techniques were investigated in this study. For this purpose, OMW was centrifuged, and filtered via UC010 ultrafiltration membrane followed by filtration through NP010, NP030, and NF270 nanofiltration membranes, and XLE and BW30 reverse osmosis membranes. Besides, skipping the ultrafiltration step, the centrifuged OMW was filtered through NP010 and NP030 membranes in order to evaluate the performance of the centrifuging process as a pretreatment ...
Tópico(s): Solar-Powered Water Purification Methods
2010 - Elsevier BV | Desalination
Kübra Ulucan-Altuntas, Neslihan Manav Demır, Fatih İlhan, Huseyin Baran Gelgor, Katherine Huddersman, Abhishek Tiwary, Eyüp Debik,
Wastewater treatment plants (WWTPs) are the main source of emerging pollutants encountered in surface water, albeit existing standards apply to a very limited number of emerging compounds. This paper presents a case study on non-target analysis, performed on influent and effluent samples from the WWTPs in Kocaeli, Türkiye. The samples were concentrated through solid-phase extraction, followed by LC-MS/MS analysis to identify emerging compounds, typically found in wastewater and treated wastewater. ...
Tópico(s): Analytical chemistry methods development
2022 - Elsevier BV | Journal of Water Process Engineering
Raghad Asad Kadhim ALOBAIDI, Kübra Ulucan-Altuntas, Rasha Khalid Sabri Mhemid, Neslihan Manav Demır, Özer Çınar,
Although conventional biological treatment plants can remove basic pollutants, they are ineffective at removing recalcitrant pollutants. Membrane bioreactors contain promising technology and have the advantages of better effluent quality and lower sludge production compared to those of conventional biological treatment processes. In this study, the removal of pharmaceutical compounds by membrane bioreactors under different solid retention times (SRTs) was investigated. To study the effect of SRT ...
Tópico(s): Analytical chemistry methods development
2021 - Multidisciplinary Digital Publishing Institute | International Journal of Environmental Research and Public Health
Hülya Civelek Yörüklü, Emre Korkmaz, Neslihan Manav Demır, Bestami Özkaya, Ahmet Demir,
Tópico(s): Microbial metabolism and enzyme function
2017 - Springer Science+Business Media | Journal of Material Cycles and Waste Management
Selami Demi̇r, Neslihan Manav Demır, Aykut Karadeniz,
Abstract An MS Excel tool for teaching hydraulic analysis of water distribution networks (WDNs) was developed. The tool is able to perform both steady‐state and extended period simulations of a WDN. The tool does not require installation and offers a portable solution to WDN design problem in undergraduate environmental engineering studies.
Tópico(s): Numerical Methods and Algorithms
2017 - Wiley | Computer Applications in Engineering Education
This paper presents the results of DNA-based molecular analyses of the microbial community responsible for biological iron (Fe) and manganese (Mn) removal in slow sand filters (SSF).A lab-scale SSF was operated in 55-day sets under different operating conditions in order to evaluate long-term performance of the filter.The concentrations of Fe and Mn in synthetic feed water were increased from 1 mg/L to 2 mg/L at two different filtration rates (0.1 and 0.3 m/h).Daily samples were taken from influent ...
Tópico(s): Geochemistry and Elemental Analysis
2016 - HARD Publishing Company | Polish Journal of Environmental Studies
Arda Karluvalı, Emre Oğuz Köroğlu, Neslihan Manav Demır, Afşın Yusuf Çetinkaya, Bestami Özkaya,
Microbial fuel cell (MFC) has the potential to be an alternative pretreatment method to divert organic fraction of municipal solid waste (OFMWS) from landfilling while sustainable, clean and renewable energy can be obtained during organic matter removal. Thus searching for optimal conditions to achieve more energy and organic removal is critical for the practical application of MFCs. Herein, an approach investigating the temperature effect on reactor performance and waste treatment was adopted to ...
Tópico(s): Wastewater Treatment and Nitrogen Removal
2015 - Elsevier BV | Separation and Purification Technology
Afşın Yusuf Çetinkaya, Emre Oğuz Köroğlu, Neslihan Manav Demır, Derya Yılmaz Baysoy, Bestami Özkaya, Mehmet Çakmakçı,
Electricity production from brewery wastewater using dual-chamber microbial fuel cells (MFCs) with a tin-coated copper mesh in the anode was investigated by changing the hydraulic retention time (HRT). The MFCs were fed with wastewater samples from the inlet (inflow, MFC-1) and outlet (outflow, MFC-2) of an anaerobic digester of a brewery wastewater treatment plant. Both chemical oxygen demand removal and current density were improved by decreasing HRT. The best MFC performance was with an HRT of 0. ...
Tópico(s): Supercapacitor Materials and Fabrication
2015 - Elsevier BV | CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION)
Tamer H. Coskun, Eyüp Debik, Harun Akif Kabuk, Neslihan Manav Demır, İrfan Baştürk, Burcu Yıldırım, Duygu Temizel, Seyma Kucuk,
Poultry slaughterhouse wastewater, which represents one of the most important pollutants in Turkey, is generally treated with conventional biological processes in Turkey and around the world. In this study, poultry slaughterhouse wastewater was treated using laboratory-scale membrane processes, which were substituted for conventional processes. The performances of the membrane processes were investigated in terms of chemical oxygen demand (COD), conductivity, and membrane fluxes. Economic analyses ...
Tópico(s): Membrane-based Ion Separation Techniques
2015 - Taylor & Francis | Desalination and Water Treatment
Eyüp Debik, Neslihan Manav Demır,
Tópico(s): Constructed Wetlands for Wastewater Treatment
2009 - Springer Science+Business Media | Bioprocess and Biosystems Engineering
Nuray Yıldırım, Neslihan Demir, Gökhan Alpaslan, Bahadır Boyacıoğlu, Mustafa Yıldız, Hüseyin Ünver,
(E)-4-Chloro-2-[(pyridin-2-ylimino)methyl]phenol was synthesized in the reaction of 2-aminopyridine with 5-chlorosalicylaldehyde. The structure of compound was investigated by FTIR, UV?Vis, 1H-NMR, 13C-NMR and X-ray data. In addition, characterization of the compound was realized using theoretical quantum mechanical calculations and experimental spectroscopic methods. The molecular structure of the compound was confirmed using X-ray single-crystal data, NMR, FTIR and UV?Vis, which were in good agreement ...
Tópico(s): Inorganic and Organometallic Chemistry
2018 - Serbian Chemical Society | Journal of the Serbian Chemical Society
Mustafa Yıldız, Eric Tan, Neslihan Demir, Nuray Yıldırım, Hüseyin Ünver, Aşkın Kiraz, Burcu Mestav,
Tópico(s): Synthesis and biological activity
2015 - Pleiades Publishing | Russian Journal of General Chemistry
Elif Akhüseyin Yıldız, Yasemin Pepe, Diğdem Erdener, Ahmet Karatay, Bahadır Boyacıoğlu, Hüseyin Ünver, Gönül Yapar, Neslihan Demir, Mustafa Yıldız, Ayhan Elmalı,
In this study, 2-formylbenzenesulfonic acid sodium salt-based Schiff bases were synthesized from the reactions of 2-formylbenzenesulfonic acid sodium salt with 2-amino-4-chlorophenol and 2-amino-4-methylphenol. The structure of the compounds was determined by FTIR, UV–Vis and NMR spectroscopy methods using both experimental and DFT methods. The anion sensor properties of the compounds were investigated both UV–Vis spectroscopically and calorimetrically. In addition, the antimicrobial activities, ...
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2023 - Elsevier BV | Journal of Molecular Structure
Hüseyin Ünver, Bahadır Boyacıoğlu, Neslihan Demir, Celal Tuğrul Zeyrek, Mustafa Yıldız,
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2020 - Elsevier BV | Journal of Molecular Structure
Celal Tuğrul Zeyrek, Hüseyin Ünver, Bahadır Boyacıoğlu, Neslihan Demir, Gönül Yapar, Hakan Dal, Mustafa Yıldız,
We report the synthesis and characterization, biological activity, DNA binding, colorimetric anion sensor properties, computational (HF) and molecular docking studies of a novel Schiff base (E)-4-[(4-ethoxyphenylimino)methyl]-2-methoxyphenol.The molecular structure of the title compound was experimentally determined using spectroscopic data and was compared to the structure predicted by theoretical calculations using density functional theory (DFT).In addition, atomic charges, molecular electrostatic ...
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2018 - Croatian Chemical Society | Croatica Chemica Acta