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Search Results: 1 - 10 of 9567 matches for " Wan Mohamad Daud Wan Yusof "
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Production of Endopolysaccharides from Malaysia’s Local Mushrooms in Air-Lift Bioreactor  [PDF]
Shaiful Azuar Mohamad, Mat Rasol Awang, Rusli Ibrahim, Choong Yew Keong, Mohd Yusof Hamzah, Rosnani Abdul Rashid, Sobri Hussein, Khairuddin Abdul Rahim, Fauzi Daud, Aidil Abdul Hamid, Wan Mohtar Wan Yusoff
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.67046
Abstract: Four local mushroom species, viz. Auricularis polytricha, Lentinus edodes, Agrocybe sp and Pleurotus flabellatus were grown under submerged culture and screened for endopolysaccharides. The fermentation was done in 250 ml working volume Erlenmeyer flask and the fermentation curves for all species were established. Pleurotus flabellatus has the highest rate of biomass production at the rate of 0.180 g/L/day, at 10 days hence chosen for further investigation. Two additional media, viz. Mushroom Complete Media (MCM) and Yeast Malt (YM) were selected to be compared with potato extract(PE) media used initially. MCM media produced the highest biomass productivity at the rate of 0.311 g/L/day. Pleurotus flabellatus biomass was extracted using modified Mizuno method and the endopolysaccharide obtained was tested for β-glucan. The yield of β-glucan was 7.70 ± 1.11 g/100g. The polysaccharides were purified using column chromatography to yield four fractions. The fourth fraction F4, gave the highest molecular weight at 3.058 × 106 Dalton (11.8%) and 1.282 × 104 Dalton (88.2%). The mushroom, P. flabbelatus was cultured using air-lift bioreactor, and the highest productivity was obtained at air-flowrate 2 L/min, yielding 2.25 g/L/day. The yield of biomass against substrate used (glucose consumption) Yb/s was 0.78 g/g.
The Effect of Remelting on the Physical Properties of Borotellurite Glass Doped with Manganese
Syed Putra Hashim Syed Hashim,Haji Abdul Aziz Sidek,Mohamed Kamari Halimah,Khamirul Amin Matori,Wan Mohamad Daud Wan Yusof,Mohd Hafiz Mohd Zaid
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms14011022
Abstract: A systematic set of borotellurite glasses doped with manganese (1– x) [(B 2O 3) 0.3(TeO 2) 0.7]- xMnO, with x = 0.1, 0.2, 0.3 and 0.4 mol%, were successfully synthesized by using a conventional melt and quench-casting technique. In this study, the remelting effect of the glass samples on their microstructure was investigated through density measurement and FT-IR spectra and evaluated by XRD techniques. Initial experimental results from XRD evaluation show that there are two distinct phases of glassy and crystallite microstructure due to the existence of peaks in the sample. The different physical behaviors of the studied glasses were closely related to the concentration of manganese in each phase. FTIR spectra revealed that the addition of manganese oxide contributes the transformation of TeO 4 trigonal bipyramids with bridging oxygen (BO) to TeO 3 trigonal pyramids with non-bridging oxygen (NBO).
Integration of Design Safety into Curricula in the Undergraduate Programs: The Academician Perspective  [PDF]
Mohd Saidin Misnan, Wan Faida Wan Azmi, Sarajul Fikri Mohamed, Zuhaili Mohamad Ramly, Zakaria Mohd Yusof, Norazam Othman
Open Journal of Safety Science and Technology (OJSST) , 2017, DOI: 10.4236/ojsst.2017.73010
Abstract: The current and growing construction industry in the country has led to increasing of accidents related to construction workers. In an attempt to decrease accidents on site, the design safety concept is the most suitable measures to date. Though the impact is evident and potential benefits of its implementation are apparent, widespread application of this intervention in the Malaysia’s construction industry is currently lacking especially in the academic sector. Therefore, this paper aims to explore the integration of safety and health to the current curricula focusing on the engineering programmes and their perceptions towards design safety concept and its implementation. The types of design disciplines included in the research study were limited to academicians. A total of 72 respondents received via questionnaire and the?responses were scored on a 5-point Likert Scale to express their level?of agreement. The results show that the graduates are not equipped with adequate knowledge of safety and health legislation and regulations through the current curricula and disagree that the content of the programmes is adequate. Although majority agree on the positive effect of design safety towards accidents on site, there is still minority who believe that the concept has no significant effect towards site safety. However, this paper concludes that there is no major impediment from the academic sector on the implementation and integration of design safety concept to the undergraduate curricula. The implementation of design safety should be in a well organized structure for effective results towards zeroaccident as well as increases the designers value in the construction industry.
Optimization of Mycelial Biomass Production in Submerged Culture Fermentation of Pleurotus flabellatus Using Response Surface Methodology  [PDF]
Shaiful Azuar Mohamad, Mat Rasol Awang, Rosnani Abdul Rashid, Liew Siew Ling, Fauzi Daud, Aidil Abdul Hamid, Rahayu Ahmad, Wan Mohtar Wan Yusoff
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.66041
Abstract: The factors selected to optimize the productivity of Pleurotus flabellatus biomass in 250ml working volume Erlenmeyer flask were agitation rate, initial pH value and incubation temperature. The central composite design was applied to study the significant factors and the interactions between the chosen factors, if present. The Design Expert software generated 20 runs. The optimized conditions obtained were as follows: the agitation rate of 129.8 rpm, incubation temperature at 27.8°C, and initial pH of 6.06. The optimized conditions tripled the productivity at the range of 980 - 1040 mg/litre/day compared to the initial rate productivity at 310 mg/litre/day. From the quadratic equation,the agitation rate, temperature and the interaction between agitation rate and temperature were found to be significant (p < 0.05). At optimum conditions, the experimental data supported the theoretical estimate.
Wan Rosli Wan Daud,Mohamad Haafiz Mohamah Kassim,Md. Azman Seeni Mohamded
BioResources , 2011,
Abstract: The present study investigates cellulose phosphate from oil palm biomass (OPEFB-CP) as a potential biomaterial. To this effect, oil palm biomass microcrystalline cellulose (OPEFB-MCC) was phosphorylated using the H3PO4/ P2O5/ Et3PO4/ hexanol method. Characterization of OPEFB-CP was performed using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), Fourier Transform Infrared (FTIR) spectroscopy, thermogravimetry (TG), and X-ray diffraction (XRD). The cytotoxicity evaluation of OPEFB-CP was conducted on mouse connective tissue fibroblast cells (L929) using MTS Assay analysis, and the proliferation rate of OPEFB-CP on L929 was assessed by the indirect extraction method, whilst mineralization assessment was carried out by immersion of the material in Simulated Body Fluid (SBF) for 30 days. Disruption of the crystalline structure of OPEFB-MCC, changes in surface morphology of OPEFB-CP, the presence of new FTIR peaks on OPEFB-CP at 2380 cm-1 and 1380 cm-1, and a smaller rate of mass loss of OPEFB-CP are indications of a successful grafting of phosphate groups. OPEFB-CP showed non-cytotoxic in vitro biocompatibility after 72h exposure with an IC-50 value 45mg/mL and a proliferation rate of up to 8 days with no change in cells morphology below the IC-50 concentration. Apatite formation was observed on OPEFB-CP surfaces after 30 days in SBF with a Ca:P ratio of 1.85.
The Implementation of Common European Framework of References (CEFR): What Are the Effects Towards LINUS Students’ Achievements?  [PDF]
Wan Illina Wan Ishak, Maslawati Mohamad
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.916205
Abstract: Realizing the importance of English language, Malaysian government has implemented?numerousprograms?to boost English language?standard?among younger generations. One of the remedial intervention programs for primary schools is called the Literacy and Numeracy Screening or LINUS. LINUS program refers to a set of screening tests which are conducted every year to identify students’ weaknesses in literacy skills specifically in reading and writing. It was introduced in 2010?which aims at enhancing the rate of English literacy among primary school learners.?Recently, another new curriculum known as Common European Framework of Resources or CEFR has been introduced. CEFRthat?adopted the English way of learning culture seems?to?raise?many issues among?English?language teachers.It is important for educators to carry out a study in order to obtain more information on to what extent these two programs help to improve English language standard among primarystudents. Thus, this study was conducted to identify the?effects?of CEFR towards the achievement of?Year 2?students from 3 LINUS classes in a suburban primary school in Langkawi, Kedah, Malaysia. Data analysis ha
Antinociceptive Activity of Melicope ptelefolia Ethanolic Extract in Experimental Animals
Mohd Roslan Sulaiman,Azyyati Mohd Padzil,Khozirah Shaari,Syamimi Khalid,Wan Mastura Shaik Mossadeq,Azam Shah Mohamad,Syahida Ahmad,Ahmad Akira,Daud Israf,Nordin Lajis
Journal of Biomedicine and Biotechnology , 2010, DOI: 10.1155/2010/937642
Abstract: Melicope ptelefolia is a medicinal herb commonly used in Malaysia to treat fever, pain, wounds, and itches. The present study was conducted to evaluate the antinociceptive activity of the Melicope ptelefolia ethanolic extract (MPEE) using animal models of nociception. The antinociceptive activity of the extract was assessed using acetic acid-induced abdominal writhing, hot-plate, and formalin-induced paw licking tests. Oral administration of MPEE produced significant dose-dependent antinociceptive effects when tested in mice and rats using acetic acid-induced abdominal constriction test and on the second phase of the formalin-induced paw licking test, respectively. It was also demonstrated that MPEE had no effect on the response latency time to the heat stimulus in the thermal model of the hot-plate test. In addition, the antinociception produced by MPEE was not blocked by naloxone. Furthermore, oral administration of MPEE did not produce any effect in motor performance of the rota-rod test and in acute toxicity study no abnormal behaviors as well as mortality were observed up to a dose level of the extract of 5 g/kg. These results indicated that MPEE at all doses investigated which did not produce any sedative and toxic effects exerted pronounce antinociceptive activity that acts peripherally in experimental animals.
Perception on the Usage of Mobile Assisted Language Learning (MALL) in English as a Second Language (ESL) Learning among Vocational College Students  [PDF]
Wan Ummu Aiman Wan Azli, Parilah Mohd Shah, Maslawati Mohamad
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.91008
Abstract: Mobile phones are viewed as significant aids to English language learning. Numerous studies have been conducted in different contexts on mobile assisted language learning (MALL) that indicate the benefits of mobile devices for English language learning. Nevertheless, few studies on MALL had been conducted on among vocational college students in Malaysia. Therefore, this study was aimed to investigate the perception on the usage of MALL in English as a Second Language (ESL) among private vocational college students. Data were collected from a survey questionnaire adapted from Technology Acceptance Model (TAM). The results show the respondents have positive perception on the usage of MALL. Majority of the respondents showed overall agreement on both constructs perceived usefulness (PU) and perceived ease of use (PEoU) of MALL. They believed the usage of MALL will enhance the teaching and learning process. This evidence of acceptance has implication for educators and curriculum designers to exploit the mobile phone for autonomous and interactive ESL learning beyond the classroom context. It is hoped that MALL will be used as one of the teaching aids that could assist educators to teach English as a Second Language (ESL) more effectively.
A nationwide biotechnology outreach and awareness program for Malaysian high schools
Firdaus-Raih,Mohd; Senafi,Sahidan; Munir Murad,Abdul; Marzuki Sidik,Nik; Kiew Lian,Wan; Daud,Fauzi; Zainal Ariffin,Shahrul Hisham; Zamrod,Zulkeflie; Chon Seng,Tan; Sofiman Othman,Ahmad; Azni Harmin,Sharr; Radzuan Saad,Mohd Yusof; Mohamed,Rahmah;
Electronic Journal of Biotechnology , 2005,
Abstract: biotechnology education in developing nations remains one of the rate limiting factors in achieving optimal human resource capacity to drive and tap the bio-resources of these nations. many developing countries are situated within rich bio-diversity enclaves. biotechnology offers the promise of tapping these bio resources towards due process of developing these nations. while there may be a steady stream of biology and biotechnology based graduates, from malaysian as well as foreign universities contributing to the human resource base for these countries, the numbers and knowledge diversity produced, still lack the capacity to optimally power research and development as well as supply the industrial biotechnology sectors of these countries. realizing the need to address these issues at the grassroots level of higher education, malaysia has taken an active step of bringing biotechnology into the classrooms of high schools throughout the country. these future generations of malaysians, are hoped to progress towards manning and driving malaysia’s biovalley initiatives (a biotech based r&d and industry cluster), towards the national dream of developed nation status by the year 2020, using biotechnology as an economic growth vehicle. here, we share our experiences in developing and proliferating a biotechnology awareness program for malaysian high schools. it is hoped that similar programs will strive towards similar objectives in other developing countries
Indigenous (“Bumiputera”) Malay Entrepreneurs in Malaysia: Government Supports, Entrepreneurial Orientation and Firms Performances
Fakhrul Anwar Zainol,Wan Norhayate Wan Daud
International Business and Management , 2010,
Abstract: The research examines entrepreneurial orientation (EO) in Indigenous or Bumiputera entrepreneurs (Malay firms) by taking government supports as the antecedent. This construct is used to explain the influence of entrepreneurial orientation (EO) and its consequence towards firm performance. Design/methodology/approach Multiples Linear Regressions (MLR) analysis was conducted to test the hypothesis on surveyed firms selected from the current available list given by MARA (the government agency for Indigenous or Bumiputera SMEs). The specific research question is: Does the relationship between government supports received by entrepreneur and firm performance is mediated by entrepreneurial orientation (EO)? Findings In Malay firms, the relationship between government supports with firm performance was not mediates by entrepreneurial orientation (EO). However, the construct is significant as predictor towards firm performance. Practical implications This research provides a better understanding of the indigenous entrepreneurs for policy makers, NGOs, business support organizations and the indigenous entrepreneurs themselves particularly in planning or utilizing government supports programmes. Originality/value The impact of government supports towards firm performance observed in Malay firms is unique to the paper. Our studies provided the empirical test in understanding indigenous entrepreneurship in Malay firms in Malaysia towards developing a more holistic entrepreneurship theory. Key words: Entrepreneurial Orientation (EO); Government Supports; Indigenous Entrepreneurship
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