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Öğe Clinical and laboratory evaluation of anti-microbial efficacy of photocatalysts(2011) Özpolat B.; Çavuşoğlu T.; Yilmaz S.; Büyükkoçak U.; Günaydin S.Aim This study aims at investigating and testing the tentative antimicrobial efficacy; in vitro and in- hospital applications of apatite coated ferrum titanate which is one of the new generation photocatalysts. Material and Methods 30 sterile petri dishes were kept under florescent light for 4 days following the application of 20 ppm apatite coated ferrum titanate aerosol. 0.5 McFarland (1.5X108 CFU/mL -CFU=colony forming unit) Pseudomonas aeruginosa and 0.5 McFarland Acinetobacter baumannii were cultured on 10 separate dishes. 10 unprocessed dishes were used as controls. Samples were evaluated for bacterial survival rate (CFUX100/CFU) after application. In the second step, same photocatalyst aerosol was applied as 0.012 L/m2 with the specific kit on the surfaces of different units within the hospital. Particle count was measured and compared before and one-month after the photocatalyst application by lumimeter. Results Bacterial survival rate was significantly lower on photocatalyst applied surfaces versus control for Pseudomonas aeruginosa after second day of application (p<0.001) (60±8% / 95±9%). This difference continued up to the 4th day gradually (3. day: 35±5% / 90±9%; 4. day:22±5% / 85±8%). Bacterial survival rate was significantly lower on photocatalyst applied surfaces versus control for Acinetobacter baumannii after the second day of application (55±7% / 87±8%) (p<0.01). This difference continued up to the 4th day gradually (3. day:40±5% / 80±8%; 4. day:15±5% / 78±7%). Particle count on photocatalyst applied surfaces diminished 97.15% in operating room, 95.61% in ICU, 98.30 in physicians' room, 94.13% in wards and 97.04% in hospital kitchen. Conclusions As a result of our pioneering study on the evaluation of photocatalyst, we think that it may be one of the economic and safe alternative methods of hospital sterilization based on bactericidal and bacteriostatic efficacy confirmed in both laboratory and clinical applications.Öğe Disseminated tuberculosis with lymphatic, splenic and scrotal abscesses: A case report(2009) Ayaslioglu E.; Basar H.; Duruyurek N.; Kalpaklioglu F.; Gocmen S.; Erturk A.; Yilmaz S.Introduction: Disseminated tuberculosis can involve several organs and clinically present with a potpourri of signs and symptoms. Early diagnosis and timely initiation of proper treatment are of great importance in preventing the later complications of the disease. Case presentation: We report a case with disseminated tuberculosis who exhibited a wide spectrum of extrapulmonary involvement. The present case had lung and lymph node tuberculosis with abscess formation and remained undiagnosed for two years. Thereafter, multiple splenic abscesses developed that necessitated splenectomy, and at the final stage, he presented with scrotal abscesses. Conclusion: This paper highlights the diverse clinical appearances of disseminated tuberculosis and the significant importance of early diagnosis and treatment. © 2009 Ayaslioglu et al.; licensee Cases Network Ltd.Öğe The generalized bi-periodic fibonacci quaternions and octonions(Institute of Mathematics, 2019) Sahin M.; Tan E.; Yilmaz S.In this paper, we present a further generalization of the bi-periodic Fibonacci quaternions and octonions. We give the generating function, the Binet formula, and some basic properties of these quaternions and octonions. The results of this paper not only give a generalization of the bi-periodic Fibonacci quaternions and octonions, but also include new results such as the matrix representation and the norm value of the generalized bi-periodic Fibonacci sequence. © 2019 Novi Sad Journal of Mathematics. All rights reserved.Öğe
