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- 저자 : Mustafa Toprak (검색결과 3 건)
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Mehmet Karakus,Mehmet Ustuner,Mustafa Toprak 한국교육개발원 2014 KEDI Journal of Educational Policy Vol.11 No.1
This study aims to determine the relationships between organizational justice and affective and normative based outcome variables of education supervisors. Two alternative structural equation models were tested. The first model proposed burnout is the outcome of organizational justice and the antecedent of the variables of job satisfaction and organizational commitment. The second model proposed burnout is the outcome of the variables of organizational justice, job satisfaction, and organizational commitment. Although both the models had acceptable fit indices, the comparative fit indices showed the second model was more preferable. In this model, justice perceptions were found to have a positive effect on organizational commitment through the partial mediation effect of job satisfaction, and a negative effect on burnout through the full mediation effect of job satisfaction.
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Atay Turgut,Alkan Mustafa,Ertürk Sait,Toprak Umut 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.4
The development of alternatives to chemical insecticides has been an attractive topic in stored product pest management due to the limited number of options. This study examined the individual and combined activities of two promising eco-friendly alternatives, the diatomaceous earth product Detech® and the plant-based essential oil α-pinene, against Sitophilus granarius (L.), S. zeamais Motschulsky, 1855 (Coleoptera: Curculioni dae), Tribolium confusum Jaquelin Du Val, 1868 (Coleoptera: Tenebrionidae) and Rhyzopertha dominica (Fab ricius, 1792) (Coleoptera: Bostrichidae) under laboratory conditions. Individual and combined insecticidal effects of Detech® and α-pinene were evaluated by their direct application to wheat or maize. Complete mor tality against S. granarius, R. dominica, and T. confusum occurred at 2 days with 10 and 15 ppm of α-pinene, while 15 ppm of α-pinene produced 100% mortality after 3 days of exposure for S. zeamais. The highest mortality with Detech® was 38.6% at 21 days using 500 ppm for S. zeamais, while it was 51.7 % against S. granarius, and 72.7 % against R. dominica. Detech® did not show any significant activity against T. confusum at any application level. Combined applications of Detech®+α-pinene demonstrated the highest mortality on R. dominica (40.4% mor tality), S. zeamais (27.9%), and S. granarius (18.5%), while no significant effect was found on T. confusum (1.1%). Overall, α-pinene was more effective than Detech® against all four tested beetles species. Combined applications led to reduced mortality.
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Association between the Gensini Score and Carotid Artery Stenosis
Anil Avci,Serdar Fidan,Mehmet Mustafa Tabakçı,Cuneyt Toprak,Elnur Alizade,Emrah Acar,Emrah Bayam,Muhammet Tellice,Abdurrahman Naser,Ramazan Kargın 대한심장학회 2016 Korean Circulation Journal Vol.46 No.5
Background and Objectives: The aim of this study was to evaluate the association between the extent of coronary artery disease assessed by the Gensini score and/or the SYNTAX score and the significant carotid stenosis in patients undergoing coronary artery bypass grafting (CABG). Subjects and Methods: A total of 225 patients who had carotid doppler ultrasonography prior to CABG were included retrospectively. Significant coronary artery disease was assumed as a lumen diameter stenosis of ≥50% in any of the major epicardial coronary arteries. The severity of carotid stenosis was determined by B-mode and duplex ultrasonography. Clinically significant carotid stenosis was defined as peak systolic velocity greater than 125 cm/s. Results: The mean value of SYNTAX score and Gensini score was highest in patients allocated to significant carotid stenosis (22.98±7.32, p<0.001 and 77.40±32.35, p<0.001, respectively). The other risk factors for significant carotid stenosis were found to be male gender (p=0.029), carotid bruit (p<0.001), diabetes (p=0.021), left main disease (p=0.002), 3-vessel disease (p=0.008), chronic total coronary occlusion (p=0.001), and coronary artery calcification (p=0.001) in univariate analysis. However, only the Gensini score (odds ratio[OR]=1.030, p=0.004), carotid bruit (OR=0.068, p<0.001), and male gender (OR=0.190, p=0.003) were the independent predictors. The Gensini score cut off value predicting significant carotid stenosis was 50.5 with 77% sensitivity (p<0.001). Conclusion: The Gensini score may be used to identify patients at high risk for significant carotid stenosis prior to CABG.
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