Person: DÜZYER GEBİZLİ, ŞEBNEM
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DÜZYER GEBİZLİ
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ŞEBNEM
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Publication Effect of deposition time on the optoelectrical properties of electrospun PAN/AgNO3 nanofibers(Ege Universitesi, 2020-01-01) Gebizli, Şebnem Düzyer; DÜZYER GEBİZLİ, ŞEBNEM; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.The aim of this study is to produce optically transparent nanofibers with adequate electrical conductivity for optoelectrical applications where transparency and conductivity are needed. Therefore, conductive polyacrylonitrile/silver nitrate (PAN/AgNO3) nanofibers were produced by electrospinning with different deposition times ranging from 1 minute to 10 minutes. The effect of deposition time on the sheet resistance and optical transparency of the nanofibers were investigated. The surface characteristics, electrical properties and transmittance values of the electrospun mats were evaluated. Nanofibers with diameters under 700 nm were obtained. With the increasing deposition time, the sheet resistance and transparency of the samples were decreased. In order to figure out the optimum deposition time, the figures of merit of the samples were calculated. The figures of merit of the samples showed that the sample deposited for three minutes gave the best performance among the others. It was seen that conductive PAN/AgNO3 nanofibers are promising for optoelectrical applications.Publication A new approach to determination of the instability of air-jet textured yarns(Inda, 2015-01-01) Koç, Serpil Koral; Düzyer, Şebnem; Hockenberger, Aslı; KORAL KOÇ, SERPİL; DÜZYER GEBİZLİ, ŞEBNEM; HOCKENBERGER, ASLI; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü; 0000-0002-0739-8256; 0000-0003-3737-5896; AFZ-8325-2022; AFO-0698-2022; IMR-3897-2023Determination of the instability of air-jet textured yarns is a very important aspect of their quality characterization. To overcome this problem many researchers have suggested different techniques, however none has been accepted as a standard method. Among all the methods, that suggested by Demir et al. takes attention, since it was improved after investigating the advantages and disadvantages of most of the techniques in use. Recovery from strain measurements are commonly used to get information about fiber molecular structure. In this study, instability of air-jet textured yarns was investigated by using both Demir's instability test method and recovery from strain measurements. It was observed that Demir's method is a practical and reliable way to compare the instability of air-jet textured yarns produced from the same raw material. For comparing different materials it was more beneficial to use recovery from strain measurements.Publication Silymarin-loaded electrospun polycaprolactone nanofibers as wound dressing(Springer Heidelberg, 2023-03-02) Sali, Aisegkioul; Gebizli, Şebnem Düzyer; Göktalay, Gökhan; Sali, Aisegkioul; DÜZYER GEBİZLİ, ŞEBNEM; GÖKTALAY, GÖKHAN; Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü/Biyomalzeme Bölümü.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü.; Bursa Uludağ Üniversitesi/Tıp Fakültesi/Farmakoloji Anabilim Dalı.; 0000-0003-3737-5896; 0000-0001-6261-4233; 0000-0002-1973-5344; AAH-1448-2021; AFO-0698-2022; HTA-7306-2023Herein, we fabricated silymarin (SIL)-loaded polycaprolactone (PCL) electrospun nanofiber mats containing different SIL concentrations (5, 7.5, 10%) for wound dressing applications. Solution properties, nanofiber properties and SIL presence were analyzed by viscosity measurements, SEM and FTIR, respectively. Solution viscosities were increased with increasing SIL concentrations resulting in bead-free, thicker and smooth nanofibers. The lowest contact angle was measured as similar to 92 degrees for 10% SIL-loaded sample which had the smoothest nanofibers and a more controlled and continuous SIL release with a rate of 68.29% at end of 144 h during in vitro release experiments. In vivo studies on rats were conducted on this sample and results were compared with a conventional wound dressing and a PCL nanofiber mat. In comparison, the 10% SIL-loaded sample provided more rapid and significantly greater wound healing from the first day of observation. The results confirmed the potential application of PCL/SIL electrospun nanofiber mats as wound dressing.