Production of biodiesel from poppy oil by using waste marble dust as catalyst

Bu çalışmada, mermer atıkları katalizörlüğünde haşhaş yağı ve metanolden, transesterifikasyon tepkimesi ile biyodizel üretimi incelenmiştir. Katalizör olarak kullanılan CaO, toz haline getirilen mermer atıklarının 850 °C’de 3 saat süresince kalsinasyonu ile hazırlanmıştır (verim %43) ve XRD ve SEM-EDX yöntemleri ile karakterize edilmiştir. Biyodizel verimine metanol-yağ molar oranı, katalizör miktarı, tepkime süresi ve sıcaklığın etkisi incelenmiş, bu parametrelerin optimum değerleri sırası ile 6:1, %1, 120 dakika ve 65 °C olarak belirlenmiştir. Elde edilen biyodizelin yakıt özelikleri TS EN 14214 standardı ile karşılaştırılarak belirlenmiş ve dizel yakıt ile karıştırılarak kullanılabileceği öngörülmüştür.In this study, biodiesel production from poppy oil and methanol, by transesterification reaction, was investigated by using waste marble dust as catalyst. The CaO, used as catalyst, was prepared (yield 43%) by calcination of powdered marble dust at 850 °C for 3 h and characterized by XRD and SEM-EDX techniques. The effects of methanol: oil molar ratio, catalyst amount, reaction time and temperature on the biodiesel yield were investigated and optimum values of these parameters were determined as 6:1, 1%, 120 min and 65°C, respectively. The properties of the produced biodiesel were determined by compared with TS EN 14214 standard and it is expected to use with diesel

Cost-Effectiveness of Breast Cancer Screening in Turkey, a Developing Country: Results from Bahçeşehir Mammography Screening Project

Objective: We used the results from the first three screening rounds of Bahcesehir Mammography Screening Project (BMSP), a 10-year (20092019) and the first organized population-based screening program implemented in a county of Istanbul, Turkey, to assess the potential cost-effectiveness of a population-based mammography screening program in Turkey. Materials and Methods: Two screening strategies were compared: BMSP (includes three biennial screens for women between 40-69) and Turkish National Breast Cancer Registry Program (TNBCRP) which includes no organized population-based screening. Costs were estimated using direct data from the BMSP project and the reimbursement rates of Turkish Social Security Administration. The life-years saved by BMSP were estimated using the stage distribution observed with BMSP and TNBCRP. Results: A total of 67 women (out of 7234 screened women) were diagnosed with breast cancer in BMSP. The stage distribution for AJCC stages O, I, II, III, IV was 19.4%, 50.8%, 20.9%, 7.5%, 1.5% and 4.9%, 26.6%, 44.9%, 20.8%, 2.8% with BMSP and TNBCRP, respectively. The BMSP program is expected to save 279.46 life years over TNBCRP with an additional cost of $677.171, which implies an incremental cost-effectiveness ratio (ICER) of$ 2.423 per saved life year. Since the ICER is smaller than the Gross Demostic Product (GDP) per capita in Turkey ($ 10.515 in 2014), BMSP program is highly cost-effective and remains cost-effective in the sensitivity analysis. Conclusion: Mammography screening may change the stage distribution of breast cancer in Turkey. Furthermore, an organized population-based screening program may be cost-effective in Turkey and in other developing countries. More research is needed to better estimate life-years saved with screening and further validate the findings of our study.Roche Turkey; Breast Health Society of Turkey (MEMEDER); Clinical and Translational Science Award (CTSA) program, through the NIH National Center for Advancing Translational Sciences (NCATS)United States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH National Center for Advancing Translational Sciences (NCATS) [UL1TR000427]; NATIONAL CENTER FOR ADVANCING TRANSLATIONAL SCIENCESUnited States Department of Health & Human ServicesNational Institutes of Health (NIH) - USANIH National Center for Advancing Translational Sciences (NCATS) [UL1TR000427] Funding Source: NIH RePORTERThe study was funded by Roche Turkey and in part by the Breast Health Society of Turkey (MEMEDER). Also, it was partially supported by the Clinical and Translational Science Award (CTSA) program, through the NIH National Center for Advancing Translational Sciences (NCATS), grant UL1TR000427. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH

Selective photoelectrocatalytic oxidation of 3-methylpyridine to vitamin B3 by WO3 decorated nanotube-structured TiO2

Nanotube-structured TiO2 electrodes on Ti plates were formed in ethylene glycol solution by the anodic oxidation method applied for different times and calcined at 500 °C. Different amounts of WO3 were decorated on the nanotube surfaces electrochemically. The electrodes were characterized, and the effects of the nanotube length on the Ti plate, decorated WO3 amount, electrolyte concentration, applied potential, and type of radiation source on the oxidation of 3-methylpyridine were investigated, together with the product distribution/selectivity. In a photoelectrocatalytic system, the vitamin B3 yield increased significantly (ca. 17 fold) under UVA by decorating nanotube-structured TiO2 with WO3, whilst low reaction rates and no products were found under Vis irradiation, as only unselective photolytic reactions occurred. This unexpected result was clarified for the first time in the literature