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Semih?Calamak Eda?Ayse?Aksoy Ceren?Erdogdu Meral?Sag?roglu Kezban?UlubayramEmail author 《Journal of nanoparticle research》2015,17(2):87
Development of new generation bionanotextiles is an important growing field, and they have found applications as wound dressings, bandages, tissue scaffolds, etc. In this study, silver nanoparticle (AgNP) containing silk-based bionanotextiles were fabricated by electrospinning, and processing parameters were optimized and discussed in detail. AgNPs were in situ synthesized within fibroin nanofibers by UV reduction of silver ions to metallic silver. The influence of post-treatments via methanol treatment and glutaraldehyde (GA) vapor exhibited changes in the secondary structure of silk. Methanol treatment increased the tensile properties of fibers due to supported crystalline silk structure, while GA vapor promoted amorphous secondary structure. AgNP containing silk fibroin bionanotextiles had strong antibacterial activity against gram-positive Staphylococcus aureus and gram-negative Pseudomonas aeruginosa. 相似文献
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Yakup Budak Meliha Burcu Gürdere Kezban Özcan Parham Taslimi İlhami Gülçin 《合成通讯》2017,47(24):2313-2323
Novel 4,5-dihydropyrazole derivatives (3a–i), 3-(4-((3aR,4S,7R,7aS)-1,3-dioxo-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindol-2(3H)-yl)phenyl)-5-phenyl-4,5-dihydro-1H-pyrazole-1-carbothio amide, were obtained by the addition of thiosemicarbazide (2) to the chalcones (1a–i). The addition–cyclization of 2,4′-dibromoacetophenone (4) to pyrazole derivatives (3a–i) gave the new pyrazolyl-thiazole derivatives (5a–i), (3aR,4S,7R,7aS)-2-(4-(1-(4-(4-bromophenyl)thiazol-2-yl)-5-phenyl-4,5-dihydro-1H-pyrazol-3-yl)phenyl)-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione. Antibacterial and acetylcholinesterase (AChE) enzyme and human carbonic anhydrase (hCA) I, and II isoform inhibitory activities of the compounds 3a–i and 5a–i were investigated. Some of the compounds showed promising antibacterial activity. In addition, the hCA II and I were effectively inhibited by the lately synthesized derivatives, with Ki values in the range of 18.90?±?2.37 ?58.25?±?13.62?nM for hCA II and 5.72?±?0.98 ?37.67?±?5.54?nM for hCA I. Also, the Ki parameters of these compounds for AChE were obtained in the range of 25.47?±?11.11???255.74?±?82.20?nM. Also, acetazolamide, clinical molecule, was used as a CA standard inhibitor that showed Ki value of 70.55?±?12.30?nM against hCA II, and 67.17?±?9.1?nM against hCA I, and tacrine inhibited AChE showed Ki value of 263.67?±?91.95. 相似文献
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The capillary electrophoretic separation of Fe(II), Cu(II) and Zn(II) ions in an acidic buffer solution (pH 2.5) by complexation
with 1,10-phenanthroline is investigated. As 1,10-phenanthroline is a neutral ligand, the positively charged metal complexes
formed migrate in the same direction as the EOF, providing a rapid separation of metal ions in acidic buffers. The method
was applied to the determination of metal ions in vitamin tablets.
Received: 5 January 1998 / Revised: 27 March 1998 / Accepted: 15 May 1998 相似文献
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The capillary electrophoretic separation of Fe(II), Cu(II) and Zn(II) ions in an acidic buffer solution (pH 2.5) by complexation
with 1,10-phenanthroline is investigated. As 1,10-phenanthroline is a neutral ligand, the positively charged metal complexes
formed migrate in the same direction as the EOF, providing a rapid separation of metal ions in acidic buffers. The method
was applied to the determination of metal ions in vitamin tablets.
Received: 5 January 1998 / Revised: 27 March 1998 / Accepted: 15 May 1998 相似文献
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Yeliz Tunç Çiğdem Gölgelioğlu Nesrin Hasirci Kezban Ulubayram Ali Tuncel 《Journal of chromatography. A》2010,1217(10):1654-1659
The use of high internal phase emulsion polymers (polyHIPEs) for CEC applications has remained relatively unexplored. A few reports exist in the literature for the preparation of similar structures. In this study, polyHIPEs having high porosity, and interconnected open-cell structure, were introduced and evaluated as stationary phase for CEC. The polyHIPE monolithic columns were prepared by the in situ polymerization of isodecylacrylate (IDA) and divinylbenzene (DVB) in the continuous phase of a high internal phase emulsion (HIPE). Due to its well-defined polyHIPE structure with interconnected micron size spherical voids, the columns synthesized with different initiator concentrations were successfully used for the separation of alkylbenzenes. Furthermore, the columns indicated a strong electroosmotic flow (EOF) without any additional EOF generating monomer probably due to the presence of ionizable sulfate groups coming from the water-soluble initiator used in the preparation of polyHIPE matrix. The best chromatographic performance in the separation of alkylbenzenes was achieved by using 70% ACN in the mobile phase with high column efficiency (up to 200 000 plates/m). 相似文献
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