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Öğe Comparative biosorption of mercuric ions from aquatic systems by immobilized live and heat-inactivated Trametes versicolor and Pleurotus sajur-caju(Elsevier Sci Ltd, 2003) Arica, M.Y.; Arpa, C.; Kaya, B.; Bektas, S.; Denizli, A.; Genc, O.Trametes versicolor and Pleurotus sajur-caju mycelia immobilized in Ca-alginate beads were used for the removal of mercuric ions from aqueous solutions. The sorption of Hg(II) ions by alginate beads and both immobilized live and heat-killed fungal mycelia of T versicolor and P. sajur-caju was studied in the concentration range of 0.150-3.00 mmol dm(-3). The biosorption of Hg(II) increased as the initial concentration of Hg(II) ions increased in the medium. Maximum biosorption capacities for plain alginate beads were 0.144+/-0.005 mmol Hg(II)/g; for immobilized live and heat-killed fungal mycelia of T versicolor were 0.171+/-0.007 mmol Hg(II)/g and 0.383+/-0.012 mmol Hg(II)/g respectively; whereas for live and heat-killed P. sajur-caju, the values were 0.450+/-0.014 mmol Hg(II)/g and 0.660+/-0.019 mmol Hg(II)/g respectively. Biosorption equilibrium was established in about 1 h and the equilibrium adsorption was well described by Langmuir and Freundlich adsorption isotherms. Between 15 and 45 degreesC the biosorption capacity was not affected and maximum adsorption was observed between pH 4.0 and 6.0. The alginate-fungus beads could be regenerated using 10 mmol dm(-3) HCl solution, with up to 97% recovery. The biosorbents were reused in five biosorption-desorption cycles without a significant loss in biosorption capacity. Heat-killed T versicolor and P. sajur-caju removed 73% and 81% of the Hg(II) ions, respectively, from synthetic wastewater samples. (C) 2003 Elsevier Science Ltd. All rights reserved.Öğe Does ligation of internal iliac artery for postpartum hemorrhage affect clitoral artery blood flow and postpartum sexual functions?(Elsevier Science Bv, 2017) Kaya, B.; Usluogullari, B.; Yurttutan, N.; Sahan, M. H.; Gueralp, O.; Malik, E.Objective: To investigate whether internal iliac artery ligation (IIAL) for postpartum hemorrhage (PPH) affects the sexual life in the postpartum period or significantly reduces the clitoral artery blood flow. Study design: The women who underwent IIAL due to PPH during cesarean section (CS) were compared with healthy postpartum women delivered by CS between October 2014 and February 2016 in the Gaziantep Women's Health and Maternity Hospital, Gaziantep, Turkey. Clitoral Doppler flow measurements and the Female Sexual Function Index questionnaire (FSFIQ) were performed in all women in the 3rd and 6th postpartum months. This study was registered at ClinicalTrials.gov with the identification number NCT02409602. Results: Mean age, gravidity and parity, body mass index (BMI), first sexual intercourse after childbirth, and education years were similar in both groups. There was no statistically significant difference in the measurements of RI, PI, PSV, EDV, and S/D between the study and control groups in the 3rd month. Lack of statistical significance was also noted between the study and control groups values in the 6th month, as well as between the 3rd and 6th month's values within both the study group and the control group. Additionally, there were no statistically significant differences in the total FSFI scores including sexual desire, sexual arousal, lubrication, orgasm, sexual satisfaction, and pain domain scores between the study and control groups in the 3rd month; between the study and control groups 6th months; whereas all scores were higher in the 6th month compared to the 3rd month within each group. Conclusion: IIAL does not affect the blood flow of the dorsal clitoral artery between the 3rd and 6th months postpartum and between the women who underwent IIAL due to PPH and healthy postpartum women. The sexual function scores were significantly higher in the 6th month compared to the 3rd month in both groups. (C) 2017 Elsevier B.V. All rights reserved.Öğe Novel Phthalocyanines Containing Guaiacol Azo Dyes: Synhthesis, Antioxidant, Antibacterial, and Anticancer Activity(Pleiades Publishing Inc, 2018) Kantar, C.; Kaya, B.; Turk, M.; Sasmaz, S.In an attempt to understand the antibacterial, antioxidant, and anticancer properties of phthalocyanines containing azo dye, new metallophthalocyanines (M: Mn, Co, Zn) substituted with guaiacol azo dyes are described. The high DPPH scavenging and ferrous ion chelating activity are obtained from almost all compounds. All compounds exhibit a poor antibacterial activity against the studied bacteria. Cytotoxicity, apoptotic and necrotic effects are examined on human breast cancer cells (MCF-7) and fibroblast cells. It is determined that methoxy groups at newly synthesized compounds increase the antioxidant property but decrease other antibacterial and anticancer properties.Öğe Procion Brown MX-5BR attached and Lewis metals ion-immobilized poly(hydroxyethyl methacrylate)/chitosan IPNs membranes: Their lysozyme adsorption equilibria and kinetics characterization(Pergamon-Elsevier Science Ltd, 2002) Bayramoğlu, G.; Kaya, B.; Arica, M.Y.Interpenetration networks (IPNs) in membrane form were synthesized from 2-hydroxyethyl methacrylate (HEMA) and chitosan (pHEMA/chitosan) via UV-initiated photo-polymerization in the presence of an initiator alpha, alpha'-azoisobutyronitrile. Procion Brown MX-5BR (PB MX-5BR) was covalently attached onto IPNs membrane as a metal chelating dye-ligand. Two different Lewis metal ions (Fe(III) or Cu(II)) were immobilized onto the dye-ligand for utilization in the immobilized metal affinity chromatography (IMAC). The binding characteristics of a model protein (lysozyme) to IMAC adsorbents and selectivity of immobilized metal ions (Fe(III) and Cu(II)) to the lysozyme have been investigated from aqueous solution using the dye-ligand-attached IPNs membrane as a control system. The experimental data was analysed using the two adsorption kinetic models the pseudo-first-order and pseudo-second order to determine the best-fit equation for the adsorption of lysozyme onto dye-ligand and IMAC adsorbents. The second-order equation for the adsorption of lysozyme on the dye-ligand, dye-ligand-Fe(III) and dye-ligand-Cu(II) membrane systems is the most appropriate equation to predict the adsorption capacity for all the tested adsorbents. The reversible lysozyme adsorption on the dye-ligand and IMAC adsorbents obeyed the Temkin isotherm. The lysozyme adsorption capacities of the dye-ligand, dye-ligand-Fe(III) and dye-ligand-Cu(II) immobilized IPNs membranes were 79.1, 147.4, and 128.2 mg ml(-1), respectively. The adsorption of the lysozyme on the pHEMA/chitosan membrane plain was about 8.3 mg ml(-1). (C) 2002 Elsevier Science Ltd. All rights reserved.
