Yazar "Tan, S." seçeneğine göre listele
Listeleniyor 1 - 7 / 7
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Antibacterial and antifungal activity of Heracleum sphondylium subsp artvinense (conferenceObject)(Elsevier Science Bv, 2005) Kaçar, Y.; Tan, S.; Ergene, A.; Güler, P.; Mirici, S.; Hamzaoglu, E.; Yildirim, S.…Öğe Biosorption of copper(II) on immobilised Synechocystis aquatilis(Parlar Scientific Publications (P S P), 2006) Ergene, A.; Tan, S.; Katircioglu, H.; Öktem, Z.Synechocystis aquatilis was immobilized in Ca-alginate via entrapment. The plain alginate, and alive and heat-inactivated immobilized algae beads were used for the sorption of Cu2+ ions from aqueous solutions at 25 degrees C. Kinetic studies showed a fast initial rate, followed by a slower biosorption one. Adsorption of Cu2+ on the biosorbents increased with increasing initial Cu2+ ions level in the solution. The heat-inactivated alga preparation showed a higher biosorption capacity than the alive counterpart. The biosorption equilibrium was established approx. in 3 h, and the equilibrium was well-described by the Langmuir and Freundlich adsorption isotherms. The effect of pH was also investigated and the maximum adsorption of Cu2+ ions on the biosorbents was obtained approx. at pH 5.6.Öğe Biosorption of Hg(II) and Cd(II) from aqueous solutions: Comparison of biosorptive capacity of alginate and immobilized live and heat inactivated Phanerochaete chrysosporium(Elsevier Sci Ltd, 2002) Kacar, Y.; Arpa, C.; Tan, S.; Denizli, A.; Genc, O.; Arica, M.Y.Basidiospores of P. chryosporium were immobilized into Ca-alginate beads via entrapment, and the beads incubated for vegetation at 30 degreesC for 5 days. The alginate beads and both entrapped live and heat inactivated fungal mycelia of Phanerochaete chryosporium were used for the removal of Hg(II) and Cd(II) ions from aqueous solution in the concentrations range of 30-500 mg l (-1). The biosorption of Hg(II) and Cd(II) ions by the biosorbents increased as the initial concentration of Hg(II) and Cd(11) ions increased in the medium. A biosorption equilibrium was established in about 1 h and the adsorbed heavy metal ions did not change further with time. The effect of pH was also investigated and the maximum biosorption of Hg(11) and Cd(II) ions on all the tested biosorbents were obtained between pH 5.0 and 6.0. Temperature over the range 15-45 degreesC had no significant effect on the biosorption capacity. The equilibrium was well described by Langmuir and Freundlich biosorption isotherms. The alginate-fungus beads could be regenerated using 10 mM HCl, up to 97% recovery. The biosorbents were reused in three biosorption-desorption cycles with negligible decrease in biosorption capacity. (C) 2002 Elsevier Science Ltd. All rights reserved.Öğe Biosorption of reactive dyes on Scenedesmus obliquus(Elsevier Science Bv, 2005) Tan, S.; Katircioğlu, Hikmet; Öktem, Zeki; Ergene, Aysun…Öğe Production of high temperature-resistant strains of Agaricus bitorquis(Academic Journals, 2006) Güler, P.; Ergene, Aysun; Tan, S.In this study, the culture mushroom Agaricus bitorquis (Quel.) Sacc. was examined for growth of mycelia and fructifications under high temperature. The spores taken from the mushrooms that were collected from nature were grouped as A, B, C, D and E. These spores were inoculated into malt extract agar and incubated at 30 degrees C and primer mycelium was produced. The mycelium discus taken from primer mycelium in 8 mm diameter were inoculated into the center of malt extract agar and incubated at 30 degrees C, 32 degrees C, 34 degrees C, 36 degrees C, and 38 degrees C, separately. During the incubation period the growth of the mycelia were measured. The best mycelia growth for all groups was seen at 30 degrees C. At 36 degrees C, the E group mycelia and at 38 degrees C other group's mycelia did not grow. These temperatures were determined as thermal lethal point for the groups. From all the mycelia produced spawn was prepared and inoculated into compost and incubated at 30 degrees C and 32 degrees C. The harvested mushrooms were inspected morphologically.Öğe To produce efficient strains of Agaricus bitorquis (Quel.) Saccardo, which are resistant to high temperatures(Elsevier Science Bv, 2005) Güler, Perihan; Ergene, Aysun; Tan, S.…Öğe The utility of F-18-FDG PET/CT in solitary fibrous tumors of the pleura(Elsevier Doyma Sl, 2016) Tazeler, Z.; Tan, G.; Aslan, A.; Tan, S.Objective: To demonstrate the utility of F-18-FDG PET/CT in the differentiation of benign and malignant solitary fibrous tumors of the pleura (SFTP). Materials and methods: A retrospective review was performed on the F-18-FDG PET/CT data from 17 patients with histopathologically diagnosed benign or malignant SFTP. The size, side of SFTP, presence of necrosis, calcification, pleural effusion, hilar lymphadenopathy (LAP), density on CT images (Hounsfield unit-HU), and F-18-FDG uptake (SUVmax) were recorded and compared in order to detect malignant SFTP. Statistical significance was set as p < 0.05. Results: The difference in size, presence of necrosis, and hilar LAP on CT images were statistically significant (p = 0.004, p < 0.001, p = 0.015, respectively) in a comparison of benign and malignant SFTPs. The mean HU of benign SFTP was 46.16 +/- 5.52 HU, and for malignant SFTP it was 35.03 +/- 4.61 HU (p = 0.003). The mean SUVmax was 3.02 +/- 1.02 for benign SFTP and 4.89 +/- 2.12 for malignant SFTP (p = 0.021). A cut-off value of >= 7 cm for size, <= 39.81 HU for density, and >= 3.47 for SUVmax was obtained by ROC analysis for detecting malignant SFTP. Conclusions: F-18-FDG PET/CT may have a limited role in diagnosing malignant SFTP in suspected patients. (C) 2015 Elsevier Espana, S.L.U. and SEMNIM. All rights reserved.
