PREPARATION AND CHARACTERIZATION OF ACTIVATED CARBON BASED CATALYSTS

Bu çalışmada, alkali yakıt hücrelerinde kullanılmak üzere aktif karbon destekli nikel, gümüş ve ikili nikel-gümüş katalizörler akımsız biriktirme yöntemi ile hazırlandı. Katalizörlerin yüzey ve mikro yapıları SEM ve EDAX yöntemleri ile aydınlatıldı. Metanol, etanol, sodyumborhidrür ve hidrojen peroksite karşı katalizörlerin elektrokimyasal aktiviteleri alkali çözeltide dönüşümlü voltametri yöntemi ile incelendi. Dönüşümlü voltametri çalışmalarında aktif karbon toz destekli Nikel katalizörün (Ni/C) hidrojen peroksit varlığında diğer katalizörlere göre daha yüksek akım değerlerine ulaştığı tespit edildi. Tarama hızının kara kökü ile anodik pik akımları grafiğe geçirildiğinde elde edilen doğru katalizörün difüzyon kontrollü bir süreç izlediğini gösterdi.In this study, nickel, silver and binary nickel-silver deposited activated carbon electrode (Ni/C, Ag/C and Ni-Ag/C) prepared by electroless deposition method were examined for their electrocatalytic activities towards the oxidation of hydrogen peroxide, natriumborohydride, methanol and ethanol in alkaline solutions. The surface microstructures were examined by SEM and EDAX methods. The methods of cyclic voltammetery (CV) were employed.In CV studies, in the presence of hydrogen peroxide Ni deposited activated carbon powder electrode shows a significantly higher response for hydrogen peroxide oxidation. The anodic peak currents show linear dependency upon the square root of scan rate. This behavior is the characteristic of a diffusion controlled process

Early neonatal outcomes of very-low-birth-weight infants in Turkey: A prospective multicenter study of the Turkish Neonatal Society

Beken, Serdar/0000-0002-8609-2684; BAS, AHMET YAGMUR/0000-0002-1329-2167; Bulbul, Ali/0000-0002-3510-3056; Karatekin, Guner/0000-0001-7112-0323WOS: 000534242500056PubMed: 31851725Objective To investigate the early neonatal outcomes of very-low-birth-weight (VLBW) infants discharged home from neonatal intensive care units (NICUs) in Turkey. Material and methods A prospective cohort study was performed between April 1, 2016 and April 30, 2017. the study included VLBW infants admitted to level III NICUs. Perinatal and neonatal data of all infants born with a birth weight of.1500 g were collected for infants who survived. Results Data from 69 NICUs were obtained. the mean birth weight and gestational age were 1137 +/- 245 g and 29 +/- 2.4 weeks, respectively. During the study period, 78% of VLBW infants survived to discharge and 48% of survived infants had no major neonatal morbidity. VLBW infants who survived were evaluated in terms of major morbidities: bronchopulmonary dysplasia was detected in 23.7% of infants, necrotizing enterocolitis in 9.1%, blood culture proven late-onset sepsis (LOS) in 21.1%, blood culture negative LOS in 21.3%, severe intraventricular hemorrhage in 5.4% and severe retinopathy of prematurity in 11.1%. Hemodynamically significant patent ductus arteriosus was diagnosed in 24.8% of infants. Antenatal steroids were administered to 42.9% of mothers. Conclusion the present investigation is the first multicenter study to include epidemiological information on VLBW infants in Turkey. Morbidity rate in VLBW infants is a serious concern and higher than those in developed countries. Implementation of oxygen therapy with appropriate monitoring, better antenatal and neonatal care and control of sepsis may reduce the prevalence of neonatal morbidities. Therefore, monitoring standards of neonatal care and implementing quality improvement projects across the country are essential for improving neonatal outcomes in Turkish NICUs.Turkish Neonatal Society [2-2016]; Turkish Neonatal SocietyThis study was supported by the Turkish Neonatal Society, http://www.neonatology.org.tr, number 2-2016, received by AYB. Turkish Neonatal Society funded the study's online registry system. the funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript