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Catalytic pyrolysis of waste oil into hydrocarbon fuel utilizing cerium oxide catalyst
Mohamad Arsyad Abdul Khalid,Nurhayati Abdullah,Mohamad Nasir Mohamad Ibrahim,Rahmad Mohd Taib,Salmiah Jamal Mat Rosid,Nurasmat Mohd Shukri,NoorFatimah Yahaya,Wan Nazwanie Binti Wan Abdullah 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.6
The depletion of fossil fuels has prompted research into alternative fuels made from regeneration of wastematerials. Pyrolysis is a method of converting waste oil into valuable products, such as char, gas, and fuel. This studypresents the catalytic pyrolysis of waste oil for producing fuel utilizing cerium oxide, CeO2/Al2O3 and zinc oxide, ZnO/Al2O3 catalyst. The catalyst and oil were characterized using several characterization techniques to find the physicochemicalproperties of the catalyst and oil. The optimum condition for catalytic pyrolysis was a reaction temperature at500 oC, with the heating rate at 10 oC/min, utilizing CeO2/Al2O3 catalyst calcined at 700 oC. The catalytic pyrolysis successfullyconverted the waste oil into fuel and the oil product obtained was 93.01 wt% with a high calorific value(54.2MJ/kg). The pyrolysis oil is comprised of aliphatic hydrocarbon (C5-C15 hydrocarbon) that is within the hydrocarbonrange for gasoline and diesel. The oil product was also detected to have a low content of oxygen (3.07 wt%) andsulfur (0.60wt%), indicating its potential to serve as a cleaner, fuel reducing the sulfur dioxide, SOX formation. Theresults reveal that pyrolysis reactors have the ability to convert waste oil into hydrocarbon fuel.
Acute oral toxicity and bioavailability of uranium and thorium in contaminated soil
Rashid Nur Shahidah Abdul,엄우용,Ijang Ibrahim,Khoo Kok Siong,SINGH BHUPENDRA KUMAR,Mahzan Nurul Syiffa,Fadzil Syazwani Mohd,Rodzi Nur Syamimi Diyana,Nasir Aina Shafinas Mohamad 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.4
A robust approach was conducted to determining the absolute oral bioavailable (fab) fractions of 238U and 232Th in rats exposed to contaminated soil along with their hematotoxicity and nephrotoxicity. The soil sample is the International Atomic Energy Agency-312 (IAEA-312) certified reference material, whereas blood, bones, and kidneys of in vivo female Sprague-Dawley (SD) rats estimate 238U- and 232Th-fab fractions post-exposure. We predict the bioavailable concentration (Cab) and fab values of 238U and 232Th after acute soil ingestion. The blood 238U (0.750%) and 232Th (0.028%) reach their maximum fab values after 48 h. The 238U (fab: 0.169–0.652%) accumulates mostly in the kidney, whereas the 232Th (fab: 0.004–0.021%) accumulates primarily in the bone. Additionally, 238U is more bioavailable than 232Th. Post 48 h acute ingestion demonstrates noticeable histopathological and hematological alterations, implying that intake of 238U in co-contaminated soil can lead to erythrocytes and proximal tubules damage, whereas, 232Th intake can harm erythrocytes. Our study provides new directions for future research into the health implications of acute oral exposures to 238U and 232Th in co-contaminated soils. The findings offer significant insight into the utilization of in vivo SD rat testing to estimate 238U and 232Th bioavailability and toxicity in exposure assessment.
Survival Rate of Breast Cancer Patients In Malaysia: A Population-based Study
Abdullah, Nor Aini,Mahiyuddin, Wan Rozita Wan,Muhammad, Nor Asiah,Ali, Zainudin Mohamad,Ibrahim, Lailanor,Tamim, Nor Saleha Ibrahim,Mustafa, Amal Nasir,Kamaluddin, Muhammad Amir Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.8
Breast cancer is the most common cancer among Malaysian women. Other than hospital-based results, there are no documented population-based survival rates of Malaysian women for breast cancers. This populationbased retrospective cohort study was therefore conducted. Data were obtained from Health Informatics Centre, Ministry of Health Malaysia, National Cancer Registry and National Registration Department for the period from $1^{st}$ January 2000 to $31^{st}$ December 2005. Cases were captured by ICD-10 and linked to death certificates to identify the status. Only complete data were analysed. Survival time was calculated from the estimated date of diagnosis to the date of death or date of loss to follow-up. Observed survival rates were estimated by Kaplan-Meier method using SPSS Statistical Software version 17. A total of 10,230 complete data sets were analysed. The mean age at diagnosis was 50.6 years old. The overall 5-year survival rate was 49% with median survival time of 68.1 months. Indian women had a higher survival rate of 54% compared to Chinese women (49%) and Malays (45%). The overall 5-year survival rate of breast cancer patient among Malaysian women was still low for the cohort of 2000 to 2005 as compared to survival rates in developed nations. Therefore, it is necessary to enhance the strategies for early detection and intervention.