Browsing by Author "Elmas C."

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    Comparison of mobile interaction management products using systematic literature review method and a new product suggestion; [Sistematik Literatür Inceleme Yöntemi Kullanilarak Mobil Etkileşim Yönetimi Ürünlerinin Karşilaştirilmasi ve Yeni Ürün Önerisi]
    (Institute of Electrical and Electronics Engineers Inc., 2017) Öztürk S.; Elmas C.; Bozyiǧit F.; Kilmç D.
    Because of innovations and improvements in technology, the use of smartphones that make it easier for users to work has become widespread. At this point, companies can reach their customers more easily and can communicate continuously. Once mobile applications are created, the system infrastructure needs to be improved in response to changing needs and demands to actively retain registered users and continually capture their insights. In this case, a dynamic framework that will create user profiles in a mobile application and provide services according to different user needs. In this study, the main features of the mobile interaction management applications on the market and other features they provide to create a loyal user base have been evaluated using the Systematic Literature Review (SLI) method and the necessary gaps have been discussed. In order to acquire loyal mobile-app user, Machine Learning support system is proposed as solution. © 2017 IEEE.
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    Effects of various antioxidants on rat lung tissue during chemotherapy: Electron microscopic study; [Kemoterapi Uygulamasinda Çeşitli Antioksidanlarin Siçan Akciǧer Dokusu Üzerindeki Etkileri: Elektron Mikroskobik Çalişma]
    (Gazi Universitesi, 2021) Yazici G.N.; Gürgen S.G.; Sunar M.; Elmas C.
    Objectives: This study uses transmission electron microscopy technique to investigate the efficacy of different antioxidants (such as ascorbic acid, alpha-tocopherol and selenium) in repairing or reversing lung damage caused by the possible adverse effects of the chemotherapy (cyclophosphamide) application on the lung tissue of the subjects. Materials and Methods: Thirty female Wistar rats were divided into five groups of six rats each: (I) control, (II) cyclophosphamide only (75 μg/kg), (III) cyclophosphamide (75 μg/kg) + ascorbic acid (200 μg/kg/day), (IV) cyclophosphamide (75 μg/kg) + α-tocopherol (150 μg/kg/day) and (V) cyclophosphamide (75 μg/kg) + selenium (40 ppm/kg/day). At the end of the experimental period the rats were sacrificed and the left lung of the subjects was removed and placed in a 2.5% glutaraldehyde solution in a 1/15 μ phosphate buffer (pH 7.4). The tissues were then stained with uranyl acetate and lead citrate to enhance the contrast, and examined and photographed with an electron microscope (Carl Zeiss 900 EM). Results: Alveolar type II cells were found to have degenerated in the cyclophosphamide-treated lung tissues. Vacuolization and crystolisis of mitochondria, disruption of the lamellar order and indications of apoptosis were observed. In the α-tocopherol group, mitochondria were normal and fibrosis was reduced. In this group, damage to the cell membrane and defects of lamellar bodies were present. Other groups produced similar results to the cyclophosphamide group. Conclusion: The results of our study showed that from all the antioxidants administered to rats during chemotherapy, only α-tocopherol was efficient in healing the tissue damage caused by cyclophosphamide. © Copyright 2021 by Gazi University Medical Faculty.