Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - Scopus: 1Production and Dispersion of Plasma Functionalized Carbon Nanotubes in Pan Fiber Spinning Solution With Different Surfactants(MMOB Tekstil Mühendisleri Odası, 2022) Kutlu, Bengi; Akşit, Aysun; Özyüzer, Lütfi; Yağmurcukardeş, Nesli; Selamet, YusufIn this study, the distribution of plasma-functionalized multi-walled carbon nanotubes in polyacrylonitrile nanocomposite fibers produced by wet spinning method using different surfactants (Triton-X and sodium dodecyl sulfate) was investigated. Firstly, we produced CNTs by chemical vapor deposition (CVD) technique. Secondly, low-pressure plasma functionalization of CNTs was realized. Finally, nanocomposite polyacrylonitrile fibers doped by CNTs were obtained using wet spinning technique. Properties of produced carbon nanotubes, functionalized carbon nanotubes and nanocomposite polyacrylonitrile fibers were examined by the analyses of chemical composition, surface structure, structural and mechanical properties.Article Citation - WoS: 39Citation - Scopus: 37Flow-Through Colorimetric Assay for Detection of Nucleic Acids in Plasma(Elsevier, 2019) Ammanath, Gopal; Yeasmi, Sanjida; Srinivasulu, Yuvasri; Vats, Mukti; Cheema, Jamal Ahmed; Nabilah, Fairuz; Liedberg, Bo; Yıldız, Ümit HakanA flow-through colorimetric assay for detection of nucleic acids in plasma is reported. The proposed assay features an array of four polyvinylidene fluoride (PVDF) membranes impregnated with cationic poly (3-alkoxy-4-methylthiophene) (PT) as an optical reporter. The sensing strategy is based on monitoring the changes in optical properties of PT, upon complexation with target nucleic acids in the presence and in the absence of their corresponding complementary peptide nucleic acids (PNAs). As a proof of concept, the proposed methodology is validated using two biomarkers; lung cancer associated microRNA (mir21) and hepatitis B virus DNA (HBV-DNA). The flow-through colorimetric assay enabled detection of mir21 and HBV-DNA in plasma without requiring tedious sample pre-treatment and clean up protocols. Colorimetric responses for mir21 and HBV-DNA were obtained at nanomolar concentrations over five orders of magnitudes (from 1 nM to 10 mu M), with a limit of detection of -0.6 nM and -2 nM in DI water and plasma, respectively. A logic gate system was developed to utilize the colorimetric assay responses as inputs for discrimination of mir21 and HBV-DNA and subsequently to obtain a profile of nucleic acids in samples that exceed respective clinical threshold limits, thereby enabling rapid and point of care (POC) disease diagnosis. Furthermore, the proposed methodology can be utilized for detection of a large number of nucleic acids in plasma by extending the array of PT impregnated membranes incorporated with their corresponding complementary PNAs. (C) 2019 Elsevier B.V. All rights reserved.Conference Object Low Temperature Plasma: a New Disinfection Method for Food and Food Contact Surfaces(Technical Research Center of Finland, 2009) Baysal, Ayşe Handan; Baysal, TanerThe need for ensuring microbial food safety and quality, without adversely affecting the nutritional, functional and sensory characteristics of foods, has led to an increase in low-temperature or non-thermal processing technologies for food preservation. These emerging technologies including high hydrostatic pressures, pulsed electric field and low-temperature plasmas inactivate microorganisms at ambient or moderately elevated temperatures and short treatment times.