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Wan Nazwanie Wan Abdullah,Wan Azelee Wan Abu Bakar,Rusmidah Ali 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.10
The performance of oxidative desulfurization (ODS) of commercial diesel by alumina supported polymolybdate based catalyst system was studied using tert-butyl hydroperoxide (TBHP) as an oxidizing agent. From catalytic testing, MoO3-Al2O3 calcined at 500 oC was the most potential catalyst which gave the highest sulfur removal under mild condition. The sulfur content in commercial diesel was successfully reduced from 440 ppmw to 105 ppmw followed by solvent extraction. Response surface methodology involving Box-Behnken was employed to evaluate and optimize MoO3/Al2O3 preparation parameters (calcination temperatures, molybdenum loading precursor and catalyst loading), and their optimum values were found to be 510 oC, 0.98 g and 11.18 g/L of calcination temperature, molybdenum loading precursor and catalyst loading, respectively. Based on results, the reaction mechanism for oxidation of sulfur compounds to the corresponding sulfones occur in the presence of MoO3 /Al2O3 catalyst was proposed.
The Impact of Microfinance on Households' Socioeconomic Performance: A Proposed Mediation Model
ABDULLAH, W Muhammad Zainuddin B Wan,ZAINUDIN, Wan Nur Rahini Aznie Bt,ISMAIL, Sarina Binti,HAAT, Mohd Hassan Che,ZIA-UL-HAQ, Hafiz Muhammad Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3
Economic deprivation of households remains a significant economic issue in the world. Researchers have shown great concern in identifying crucial factors to enhance poor households' socio-economic performance. Therefore, this paper aims to develop a new conceptual framework to investigate the influence of different microfinance services on households' socioeconomic performance using moderated mediation analysis of various crucial factors. Focus-group interviews with managements of the microfinance institution, i.e. Amanah Ikhtiar Malaysia (AIM), and a systematic literature review were conducted for this purpose, and a new framework for the future study has been developed. The result from focus-group interviews and systematic literature review propose microfinance financial services, training programs, and business coaching as independent factors, whereas household socioeconomic performance as a dependent factor in the proposed model. Specifically, this study provides the direction to scholars to empirically test the direct relationship between financial services and household socioeconomic performance and the indirect relationship between training programs, business coaching, and household socioeconomic performance. Further, microfinance institutions' service efficiency is also included as a moderator that can strengthen microfinance services' effectiveness. The study also provides useful implications for policymakers, financial institutions, households, micro-enterprises, and researchers to better understand microfinance interventions and household economic mechanisms.
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.
Characterization of TixZn(1−x)Al2O4 Thin Films by Sol-gel Method for GPS Patch antennae
Huda Abdullah,Wan Nasarudin Wan Jalal,Mohd Syafiq Zulfakar,Mohammad Tariqul Islam,Badariah Bais,Sahbudin Shaari 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.1
The need for miniaturization and weight reduction of a GPS patch antennae has forced scientiststo search for new microwave dielectric materials. The sol-gel method was used to prepareTixZn(1−x)Al2O4-based microwave dielectric ceramic thin films (x = 0.00, 0.10, 0.20 and 0.30) andto fabricate a GPS patch antennae. The phases of ZnAl2O4 and TiO2 co-exist with each otherand form a two-phase system, which is confirmed by the X-ray diffraction (XRD) patterns andthe Fourier-transform infrared (FTIR) spectra analysis. The addition of titanium dioxide (TiO2)increased the crystallite size, grain size, surface roughness and apparent density. A material witha higher density tends to increase the dielectric constant ("r), which is suitable for miniaturizationof a GPS patch antenna. As the TiO2 content increased, the "r values increased linearly. Finally,GPS patch antennae were successfully fabricated using the ZnAl2O4 and Ti0.30Zn0.70Al2O4 material. The performances and the operating frequencies of the GPS patch antennae were measuredusing a PNA series network analyzer. The result showed that both patch antennae resonated atfrequency of 1.570 GHz and gave a return loss less than −10 dB. The optimal performance of theGPS patch antennae was obtained from the specimen using Ti0.30Zn0.70Al2O4 ("r 14.57, widebandwidth of 240 MHz and low return loss of −34.5 dB), which meets the requirements of GPSapplications.
DAUD, Salina,WAN HANAFI, Wan Noordiana,SOHAIL, M. Sadiq,WAN ABDULLAH, Wan Mohammad Taufik,AHMAD, Nurul Nadiah Korea Distribution Science Association 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.8
Graduate well-being is foundational to academic success, and they are becoming more and more vulnerable. This is as they suffer from mental health challenges like anxiety and depression at rates six times higher than the general population. When the nature of their educational experience changes, such as when they had to stay in their homes during the COVID-19 pandemic, the stress on their mental health increases. The number of cases of emotional wellness among university students is considered a public health problem, but these young people often do not seek appropriate treatment. This study, therefore, aims to identify the influence of health behavior factors on graduate emotional wellness. This study used a questionnaire with a cross-sectional survey design. Questionnaires were distributed online to graduates from selected Private and Public Higher Education Institutions in Malaysia. The Partial Least Square Equation Model (PLS-SEM) was used to analyze the results of the study. Overall findings indicate that the health behavior factors have a significant influence on graduate emotional wellness. The findings from this study will benefit the management, academics, counselors, and other entities, including the Students' Representative Council, in identifying ways to improve services and upgrade the necessary facilities to enhance the graduate's emotional wellness.
Ihab Ali Naser,Rohana Jalil,Wan Manan Wan Muda,Wan Suriati Wan Nik,Zalilah Mohd Shariff,Mohamed Rusli Abdullah 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.3
BACKGROUND/OBJECTIVES: The purpose of the study was to investigate the relationship between household food insecurity and nutritional status of children in low-income households. A cross sectional study involved a survey of households (n = 223) receiving the financial assistance. SUBJECTS/METHODS: Eligible mothers that fulfilled the inclusion criteria such as non-pregnant, non-lactating mothers, aged 18 to 55 years with their youngest children aged 2 to 12 years, were purposively selected. The Radimer/Cornell hunger and food-insecurity instrument was administered and children’s height and weight were measured. RESULTS: About 16.1% of the households were food secure, while 83.9% experienced some kind of food insecurity. Out of food insecure category, 29.6% households were food insecure, 19.3% women were individual food insecure and 35.0% fell into the child hunger category. Education of the mother (P = 0.047), household size (P = 0.024), number of children (P = 0.024), number of children going to school (P = 0.048), total monthly income (P < 0.001), income per capital (P < 0.001), number of household members contributing to the income (P = 0.018) and food expenditure (P = 0.006) were significant risk factors for household food insecurity. The prevalence of underweight, stunting and wasting in children were 61.0%, 61.4% and 30.6% respectively. Based on multinomial logistic regression, children in food-insecure households were 2.15 times more likely to be underweight and three times to be stunted than children in the food-secure households. CONCLUSIONS: The findings suggest that household food insecurity is associated with the nutritional status of the children in the rural area of Northeastern Peninsular Malaysia.
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.
( Abdul Aziz Mohamed Yusoff ),( Fatin Najwa Zulfakhar ),( Siti Zulaikha Nashwa Mohd Khair ),( Wan Salihah Wan Abdullah ),( Jafri Malin Abdullah ),( Zamzuri Idris ) 대한뇌종양학회 대한신경종양학회 2018 Brain Tumor Research and Treatment Vol.6 No.1
Background Mitochondria are major cellular sources of reactive oxygen species (ROS) generation which can induce mitochondrial DNA damage and lead to carcinogenesis. The mitochondrial 10398A>G alteration in NADH-dehydrogenase subunit 3 (ND3) can severely impair complex I, a key component of ROS production in the mitochondrial electron transport chain. Alteration in ND3 10398A>G has been reported to be linked with diverse neurodegenerative disorders and cancers. The aim of this study was to find out the association of mitochondrial ND3 10398A>G alteration in brain tumor of Malaysian patients. Methods Brain tumor tissues and corresponding blood specimens were obtained from 45 patients. The ND3 10398A>G alteration at target codon 114 was detected using the PCR-RFLP analysis and later was confirmed by DNA sequencing. Results Twenty-six (57.8%) patients showed ND3 10398A>G mutation in their tumor specimens, in which 26.9% of these mutations were heterozygous mutations. ND3 10398A>G mutation was not significantly correlated with age, gender, and histological tumor grade, however was found more frequently in intra-axial than in extra-axial tumors (62.5% vs. 46.2%, p< 0.01). Conclusion For the first time, we have been able to describe the occurrence of ND3 10398A >G mutations in a Malaysian brain tumor population. It can be concluded that mitochondrial ND3 10398A>G alteration is frequently present in brain tumors among Malaysian population and it shows an impact on the intra-axial tumors.
Muhammad Abdullah Rahmat,Aznan Fazli Ismail,Nursyamimi Diyana Rodzi,Eli Syafiqah Aziman,Wan Mohd Razi Idris,Tukimat Lihan 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.6
The tin tailing processing industry in Malaysia has operated with minimal regard and awareness formaterial management and working environment safety, impacting the environment and workers inaspects of radiation and heavy metal exposure. RIA was conducted where environmental samples wereanalyzed, revealing concentrations of 226Ra, 232Th and 40K between the range of 0.1e10.0, 0.0e25.7, and0.1e5.8 Bq/g respectively, resulting in the AED exceeding UNCEAR recommended value and regulationlimit enforced by AELB (1 mSv/y). Raeq calculated indicates that samples collected pose a significantthreat to human health from gamma-ray exposure. Assessment of heavy metal content via pollutionindices of soil and sediment showed significant contamination and enrichment from processing activitiesconducted. As and Fe were two of the highest metals exposed both via soil ingestion with an average of4.6 103 mg/kg-day and 1.4 104 mg/kg-day, and dermal contact with an average of 5.6 104 mg/kg-day and 6.0 104. mg/kg-day respectively. Exposure via accidental ingestion of soil and sedimentcould potentially cause adverse non-carcinogenic and carcinogenic health effect towards workers in theindustry. Correlation analysis indicates the presence of a relationship between the concentration ofNORM and trace elements