RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      • 좁혀본 항목

      • 좁혀본 항목 보기순서

        • 원문유무
        • 음성지원유무
          • 원문제공처
          • 등재정보
          • 학술지명
          • 주제분류
            • 발행연도
            • 작성언어
            • 저자

          오늘 본 자료

          • 오늘 본 자료가 없습니다.
          더보기
          • 무료
          • 기관 내 무료
          • 유료
          • KCI등재SCOPUS

            Production of Metal Oxide Containing Antibacterial Coated Textile Material and Investigation of the Mechanism of Action

            Gorkem,Gedik,Aysun,Aksit,Birol,Engin,Ufuk,Paksu 한국섬유공학회 2018 Fibers and polymers Vol.19 No.12

            The main aim of this study was to produce PVC coated textile based antibacterial textile material and to investigate the antibacterial mechanism with detailed analyzes. Metal oxide (calcium oxide, zinc oxide, magnesium oxide) powders were used to provide antibacterial functionality to coated materials. Metal oxide concentrations were varied between 5-35 %. Antibacterial tests were performed according to ISO 22196-2011 standard. Antibacterial efficiency of the samples was tested for each metal oxide type and concentration with L. innocua species. The antibacterial mechanism was investigated with ESR technique, fluorescent microscobe and microplate reader using DCFH-DA probe, UV-vis spectrometer using fluorescein probe. The results indicated that the antibacterial effect of used metal oxides was strongly arisen from radical oxygen species. The morphology of coatings was investigated with SEM and the distribution of metal oxide particles on the surface was examined with EDX analysis and EDX mapping. The changes on the molecular basis of the coating due to the metal oxide addition was analyzed with FT-IR spectroscopy. High antibacterial efficiencies (up to 100 %) were detected. It is suggested that the non-toxic metal oxides can be used as an effective and economically feasible alternative to conventional antibacterial additives for industrial applications such as conveyor belts.

          • KCI등재SCOPUS

            Bleaching of Hemp (Cannabis Sativa L.) Fibers with Peracetic Acid for Textiles Industry Purposes

            Görkem,Gedik,Ozan,Avinc 한국섬유공학회 2018 Fibers and polymers Vol.19 No.1

            Hemp plant exhibits various eco-friendly properties and hemp fiber processing does not cause environmental damage, however, it is known that most chemical operations have a risk to interrupt a sustainable production. As stated in several studies, peracetic acid is an important environmental friendly bleaching agent when compared to its conventional competitors. In this study, hemp fabric was bleached with peracetic acid with exhaustion and padding methods. The effects of temperature, pH, process time, concentration on whiteness values were determined. The influences of bleaching processes were investigated via instrumental and imaging methods. Physical properties of the treated fibers were also tested. Besides peracetic acid, hydrogen peroxide bleaching was carried out for comparison. COD values of bleaching effluents wereanalyzed for selected samples. Higher whiteness values were obtained with exhaustion bleachings than pad-batch bleachings.Quite high whiteness values (up to 68.13 Stensby whiteness index) attained in peracetic acid without significant fiber damage.

          • KCI등재

            Evaluation of Left Atrial Electromechanical Delay and Left Atrial Phasic Functions in Surgical Early Menopause Patients

            Murat,Akcay,Metin,Coksevim,Hasan,Ulubaşoğlu,Omer,Gedikli,Ozcan,Yılmaz 한국심초음파학회 2019 Journal of Cardiovascular Ultrasound Vol.27 No.2

            BACKGROUND: This study evaluated the atrial electromechanical delay (AEMD) and the left atrial (LA) mechanical functions in patients with surgical early menopause. METHODS: A total of 62 patients were included in the study: 33 patients with surgical early menopause and 29 age- and sex-matched healthy controls. The duration distance from the start of the P wave to the beginning of the A wave for the lateral mitral annulus, septal mitral annulus, and lateral tricuspid annulus was assessed by tissue Doppler echocardiography. The differences in these durations were used to calculate the inter- and intra-atrial mechanical delays. LA volumes were evaluated using the biplane area-length technique, and LA mechanical function values were measured. RESULTS: The baseline laboratory and clinical characteristics were similar between the two groups. Surgical early menopause patients displayed increased static atrial electromechanical connection (PA′) times for the septal mitral annulus and lateral tricuspid annulus compared to the controls. However, the lateral mitral annulus, the inter-atrial, the intra-LA, and the right atrial EMD PA′ times were not significantly altered in surgical early menopause patients compared to controls. Importantly, the LA volume index (28.1 ± 8.17 vs. 24.89 ± 7.96 mL/m2, p = 0.019), the maximal LA volume (49.6 ± 14.1 vs. 42.9 ± 16.1 mL, p = 0.004), the minimal LA volume (18.4 ± 7.0 vs. 15.2 ± 9.0 mL, p = 0.022), and the atrial precontraction LA volume (31.0 ± 10.9 vs. 24.9 ± 10.1 mL, p = 0.006) were higher in the patients with surgical early menopause compared to the controls. The LA reservoir, conduit and pumping functions and the total, passive, and active emptying volumes were all comparable between the two groups (p = 0.09; 0.06; 0.68; 0.06; 0.48; 0.07, respectively). CONCLUSIONS: Patients with surgical early menopause demonstrated impaired atrial electrical delay and electromechanical functions.

          • SCIESCOPUSKCI등재

            Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an <sup>152</sup>Eu source prepared in epoxy matrix and its validation by efficiency transfer method

            Yucel,,Haluk,Zumrut,,Senem,Nartturk,,Recep,Bora,Gedik,,Gizem Korean Nuclear Society 2019 Nuclear Engineering and Technology Vol.51 No.2

            In this study, an in-house $^{152}Eu$ calibration source was produced from a custom epoxy matrix with a density of ${\rho}=1.14g\;cm^{-3}$, which is chemically stable and durable form after its solidification. The homogeneity of $^{152}Eu$ in matrix was obtained better than 98%. For a Marinelli beaker geometry, an efficiency calibration procedure was applied to a n-type, coaxial, 78.5% relative efficient HPGe detector in the energy range of 121.7-1408.0 keV by using in-house $^{152}Eu$ calibration source. Then the measured efficiencies for Marinelli geometry were compared with the results calculated by MEFFTRAN and ANGLE softwares for the validation. Although MEFFTRAN and ANGLE have two different efficiency transfer algorithms to calculate the efficiencies, they usually need to use a reliable and accurate reference efficiency values as input data. Hence, reference efficiency values were obtained experimentally from a multinuclide standard source for the same detector-Marinelli geometry. In the present source characterization, the corrections required for self-absorption and true coincidence summing effects for $^{152}Eu$ gamma-rays were also obtained for a such close counting geometry condition. The experimental results confirmed the validity of efficiency calculations obtained by MEFFTRAN and ANGLE softwares that are calculation tools.

          • Dietary Habits Contributing to the Cancer Prevention Among Health College Students in Turkey

            Nogay,,Nalan,Hakime,Akinci,,Ayse,Cil,Sert,,Havva,Kurtulus,,Zeynep,Gedik,,Selda Asian Pacific Organization for Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3

            This descriptive study was made to evaluate the dietary habits contributing to cancer prevention of 319 health college students. Data collection form included questions about demographic characteristics and 33 statements which evaluate dietary habits contributing to cancer prevention. Among the students, 56.1% consumed fast food outside the home/dormitory twice a week or more and 47% never exercised. Moreover, 63.9% of the students reported that their dietary habits changed negatively and 69% stated that their fruit and vegetable consumption decreased after starting the health college. The students mostly paid attention to preserving food and water consumption while they paid least attention to maintaining healthy weight and whole grain consumption. Female students, those who paid attention to the amount and calorie of the food they consumed, students who did not consume fast food, and students who exercised twice a week or three times a week had better dietary habits contributing to cancer prevention (p<0.05). According to these results we recommend that interventions which will reduce fast food consumption and increase fruit and vegetable consumption and exercising in university students should be implemented. For this purpose, appropriate conditions for preparing and preserving healthy food should be provided as well as increasing the frequency of vegetable containing meals and providing fruits and salads in every meal at school cafeterias.

          • KCI등재SCOPUS
          • KCI등재SCOPUS

            Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an 152Eu source prepared in epoxy matrix and its validation by efficiency transfer method

            Haluk,Yücel,Senem,Zümrüt,Recep,Bora,Narttürk,Gizem,Gedik 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.2

            In this study, an in-house 152Eu calibration source was produced from a custom epoxy matrix with adensity of r ¼ 1.14 g cm 3, which is chemically stable and durable form after its solidification. The homogeneityof 152Eu in matrix was obtained better than 98%. For a Marinelli beaker geometry, an efficiencycalibration procedure was applied to a n-type, coaxial, 78.5% relative efficient HPGe detector in theenergy range of 121.7e1408.0 keV by using in-house 152Eu calibration source. Then the measured efficienciesfor Marinelli geometry were compared with the results calculated by MEFFTRAN and ANGLEsoftwares for the validation. Although MEFFTRAN and ANGLE have two different efficiency transfer algorithmsto calculate the efficiencies, they usually need to use a reliable and accurate reference efficiencyvalues as input data. Hence, reference efficiency values were obtained experimentally from a multinuclide standard sourcefor the same detector- Marinelli geometry. In the present source characterization, the correctionsrequired for self-absorption and true coincidence summing effects for 152Eu gamma-rays were alsoobtained for a such close counting geometry condition. The experimental results confirmed the validityof efficiency calculations obtained by MEFFTRAN and ANGLE softwares that are calculation tools.

          • KCI등재SCIE

            Swallowing and Aspiration: How Much Is Affected by the Number of Arytenoid Cartilages Remaining After Supracricoid Partial Laryngectomy?

            Caner,Kılıç,Ümit,Tunçel,Metin,Kaya,Ela,Cömert,Samet,Özlügedik 대한이비인후과학회 2017 Clinical and Experimental Otorhinolaryngology Vol.10 No.4

            Objectives. The aim of this study was to compare the effect of the presence of one or two arytenoids on early/late period swallowing-aspiration functions. Methods. Supracricoid partial laryngectomy (SCPL) with the diagnosis of laryngeal cancer between 2012 and 2014 were retrospectively evaluated. The patients were categorized into two groups as follows: group I, patients who underwent SCPL with one arytenoid cartilage and group II, patients who underwent SCPL with two arytenoid cartilages. The time of decannulation and oral feeding onset, and swallowing-aspiration functions were evaluated and compared in the early nutritional period, first, and third months. Results. There was no significant correlation between decannulation time and swallowing-aspiration. The aspiration rates in group I and group II were similar and there was no significant difference in oral feeding onset and aspiration grades in the first and third months between both groups. Conclusion. We found similar oncological and functional outcomes in SCPL which protected one or two arytenoid cartilages. Therefore we suggest to be performed one arytenoid cartilage SCPL in selected patients who was advance stage and tumor volume over with larynx cancer.

          • KCI등재후보
          맨 위로 스크롤 이동