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Proteins Inhibiting Angiotensin Converting Enzyme Derived From Pleurotus Pulmonarius Mycelium (Fr.) Quél / Badjie Xietaqieuallah Binti Ibadallah, Badjie Xietaqieuallah Ibadallah Jan 2015

Proteins Inhibiting Angiotensin Converting Enzyme Derived From Pleurotus Pulmonarius Mycelium (Fr.) Quél / Badjie Xietaqieuallah Binti Ibadallah, Badjie Xietaqieuallah Ibadallah

Student Works (2010-2019)

Pleurotus pulmonarius (grey oyster mushroom) is a well-known edible mushroom that has been acknowledged as a curative agent for many diseases. The antihypertensive potential of Pleurotus pulmonarius mycelium was investigated in vitro via angiotensin converting enzyme (ACE) inhibitory activity. The study was commenced with cultivation of P. pulmonarius mycelium using small scale liquid submerged fermentation for seven days in which brown sugar-spent yeast medium was used as substrate. The mycelial yield was separated from the whole broth to produce mycelial aqueous extract and broth extract, respectively. A preliminary ACE inhibitory assay was performed on the mycelial aqueous extract and broth …

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Improvement Of Groundwater Vulnerability Assessment Based On Gis Using Analytic Hierarchy Process In Shallow Aquifer A Case Study In West Aceh / Sayed Murtadha, Sayed Murtadha Jan 2015

Improvement Of Groundwater Vulnerability Assessment Based On Gis Using Analytic Hierarchy Process In Shallow Aquifer A Case Study In West Aceh / Sayed Murtadha, Sayed Murtadha

Student Works (2010-2019)

This study describes the utility of Analytical Hierarchy Process (AHP) model to assess the groundwater vulnerability in West Aceh. Groundwater vulnerability is an important issue in the modern time especially for aquifer modelling. The aims of this study are: 1) To produce groundwater vulnerability map using two different DRASTIC indexes,the first is DRASTIC Index by Rosen (1994) and Widyastuti (2004), and the second is DRASTIC Index by Piscopo (2001) from NSW Department of Land and Water Conservation, Australia; 2) To modify the DRASTIC vulnerability parameters using the AHP method. This is illustrated with twenty seven water quality samples collected from …

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Feasibility Of Fe3o4 Nanoparticles Decorated Reduced Graphene Oxide Heterostructure As Photocatalyst And Chemical Sensors / Teo Peik See, Peik See Teo Jan 2015

Feasibility Of Fe3o4 Nanoparticles Decorated Reduced Graphene Oxide Heterostructure As Photocatalyst And Chemical Sensors / Teo Peik See, Peik See Teo

Student Works (2010-2019)

In this study, iron oxide/reduced graphene oxide (Fe3O4/rGO) nanocomposite materials were successfully synthesized via a simple, eco-friendly and cost-effective approach at room temperature. The XRD spectra indicated peaks that attributed to the face-centre-cubic phase Fe3O4, while the absence peak of GO in nanocomposite provides evidence for the reduction of GO. The field emission scanning electron microscopic (FESEM) images showed Fe3O4 nanoparticles were uniformly deposited on the rGO sheets with a narrow size distribution for all the nanocomposites. Besides, the synthesized Fe3O4/rGO nanocomposites were found to be superparamagnetic in nature at room temperature. In the photocatalysis application, methylene blue (MB) solution …

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Hirarc Study For Occupational Safety And Health Evaluation Of Clinical Waste Handlers At A Hospital And An Incineration Plant / Kauselya Muniandy, Kauselya Muniandy Jan 2015

Hirarc Study For Occupational Safety And Health Evaluation Of Clinical Waste Handlers At A Hospital And An Incineration Plant / Kauselya Muniandy, Kauselya Muniandy

Student Works (2010-2019)

Clinical waste poses serious threats and hazards to human health. Clinical waste, which is categorized as a scheduled waste in Malaysia, has been increasing over the years. Thus, proper clinical waste management is important as improper clinical waste handling has led to many incidents involving handlers over the years (Arab et al., 2008). However, research on hazard and risk assessment for clinical waste management has been very limited, and there is a serious dearth of information for risk control planning. This project seeks to document the hazards found during clinical waste collection and disposal practices in a healthcare establishment and …

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Assessing Community Participation In Health Promotion Programs: A Case Study Of Maldives / Asma Ibrahim Sulaiman, Asma Ibrahim Sulaiman Jan 2015

Assessing Community Participation In Health Promotion Programs: A Case Study Of Maldives / Asma Ibrahim Sulaiman, Asma Ibrahim Sulaiman

Student Works (2010-2019)

This study assessed the participation of Maldives community in health promotion programme, namely, decision making, implementation, benefit sharing and evaluation. This study, which was conducted in the Maldives, also examined the factors associated with participation in health promotion programme. Adopting the survey method, the pre-tested interview schedule was administered to the random sample of 1,070 respondents from 3 selected atolls. The survey adopted a self-report technique. Multi-stage cluster sampling techniques were used to select the respondent for this study. The total geographical area was divided into 7 provinces and 3 provinces from Upper North, North Central and Upper South were …

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Neuro – Genetic Model For The Projection Of Crude Oil Price Capable Of Handling Of Uncertainty / Haruna Chiroma, Chiroma Haruna Jan 2015

Neuro – Genetic Model For The Projection Of Crude Oil Price Capable Of Handling Of Uncertainty / Haruna Chiroma, Chiroma Haruna

Student Works (2010-2019)

Some events occur sometimes without any warning, such as war, revolution, financial crises, terrorist attacks, political conflicts, false news, natural disasters, earthquakes, and extreme weather conditions. These types of events which we termed as uncertain events, when related to crude oil have significant effects on the price and will contribute to oil price volatility. Volatility in crude oil market has direct and indirect negative effects on the global economy and inflicts suffering on communities across the globe. The effects of crude oil volatility have no geographical boundary as there is no restriction to a specific country or region of the …

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Study Of Dna For Molecular Analysis And Biochemical Markers From Non-Invasive Samples In Beta-Thalassaemia Major Patients / Mohd Rashdan Abd Rahim, Abd Rahim Mohd Rashdan Jan 2015

Study Of Dna For Molecular Analysis And Biochemical Markers From Non-Invasive Samples In Beta-Thalassaemia Major Patients / Mohd Rashdan Abd Rahim, Abd Rahim Mohd Rashdan

Student Works (2010-2019)

Beta-thalassaemia is a common genetic disorder in Malaysia. It is a haemolytic anaemia which is caused by mutations within the β-globin gene complex, affecting the synthesis of β-globin chains. This will result in excessive free α-globin chains causing α-globin chain toxicity. Erythropoiesis is also impaired leading to chronic anaemia. Beta-thalassaemia major babies may appear healthy at birth. However, symptoms such as jaundice and anaemia will start to develop as they reach six months of life. They require frequent transfusions to maintain haemoglobin levels which lead to iron-overload. Although chelation therapy is recommended, the patients are still under oxidative stress. Patients …

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Synthesis And Characterization Of Multiwall Carbon Nanotubes Using Microwave Heating For Removal Of Heavy Metals / Mubarak Mujawar, Mujawar Mubarak Jan 2015

Synthesis And Characterization Of Multiwall Carbon Nanotubes Using Microwave Heating For Removal Of Heavy Metals / Mubarak Mujawar, Mujawar Mubarak

Student Works (2010-2019)

Carbon nanotubes (CNTs) are among the most eminent materials in the first rank of the nanotechnology revolution. The most eye-catching features of these structures are their electronic, mechanical, optical and chemical characteristics, which open a way for future applications. A new method is introduced for synthesis of CNTs by gas phase, single stage microwave assisted chemical vapor deposition (MA-CVD) using ferrocene as a catalyst and acetylene (C2H2) and hydrogen (H2) as precursor gases. A fast CNTs growth and ambient reaction condition, lowers the cost, and simplifies the procedure leading to a high yield synthesis of high-quality CNTs with minimal impurity …

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Transcriptome Profiling Of Omental Adipose Tissues In Human Obesity By Rna-Seq / Ng Hien Fuh, Hien Fuh Ng Jan 2015

Transcriptome Profiling Of Omental Adipose Tissues In Human Obesity By Rna-Seq / Ng Hien Fuh, Hien Fuh Ng

Student Works (2010-2019)

Recent scientific research has indicated that inflammation in adipose tissues plays a central role in the pathophysiology of obesity and related complications. However, despite extensive studies, the molecular mechanisms that trigger and aggravate the obesity-related inflammation remain unclear. In this study, transcriptome profiling of omental adipose tissues from three obese and four lean patients was performed using the RNA-Seq technology. Differential expression analysis identified 206 dysregulated genes (p-value < 0.05 and fold change ≥ 2) in obesity, that are known to be involved in a multitude of functions including stress response, inflammatory response and leukocyte adhesion. Furthermore, differential splicing analysis uncovered a possible role for TLR4 RNA splicing in obesity, which is further validated with an independent cohort of samples (five obese and six lean patients) using RT-qPCR. These findings suggest that, as a person experiences weight gain leading to obesity, the adipose splicing pattern of TLR4 transcripts changes in favor of activation of TLR4 signaling, which in turn, may contribute to the progression of obesity-related inflammation and complications. This study provides a glimpse at the transcriptome of disease-state adipose tissue in obesity, and demonstrates the potential importance of aberrant RNA splicing and expression in obesity-associated immune dysregulation.

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A New Technique For Lubrication Control Based On Friction Conditions In Cnc Machine Linear Guideways Using Servomotor Current Signals In Feed Drive System / Mahdi Sparham, Sparham Mahdi Jan 2015

A New Technique For Lubrication Control Based On Friction Conditions In Cnc Machine Linear Guideways Using Servomotor Current Signals In Feed Drive System / Mahdi Sparham, Sparham Mahdi

Student Works (2010-2019)

Computer Numerical Control (CNC) machining is currently one of the most important machining processes for manufacturing in industry. This is because the CNC machine offers favorable accuracy and precise machining. However, the frictional behavior in linear guideways is one of the most crucial challenges with CNC machining, as higher friction produces motion and accuracy problems. Lubrication in CNC machine guideways is used to overcome such problems. Currently, a predefined lubrication system via CNC coding command is used to lubricate guideways in CNC machines. This lubrication process is performed based on fixed times and amounts of oil injection regardless of cutting …

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Synthesis And Characterization Of Zinc Oxide And Tin Oxide Based Nanostructures For Gas Sensing Applications / Tharsika Thabothanayakam, Thabothanayakam Tharsika Jan 2015

Synthesis And Characterization Of Zinc Oxide And Tin Oxide Based Nanostructures For Gas Sensing Applications / Tharsika Thabothanayakam, Thabothanayakam Tharsika

Student Works (2010-2019)

This thesis focuses on the fabrication of one-dimensional ZnO and SnO2 based nanostructures with various morphologies by a single-step carbon-assisted thermal evaporation process and investigates their gas sensing properties. A mixture of zinc oxide, tin oxide and carbon powders was used as a source material which was loaded in a quartz boat and placed at the center of a tube furnace. A gold coated alumina substrate was placed next to quartz boat at downstream of gas flow direction. The furnace was heated to a particular growth temperature for a certain time while maintaining a constant flow of purified Ar gas. …

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Integral-Derivative (I-D) And Modulation-Index-Curve Prediction Control Techniques For Three-Phase Ac-Dc Buck-Type Converter With Simplified Voltage-Based Spwm /Azrita Alias, Alias Azrita Jan 2015

Integral-Derivative (I-D) And Modulation-Index-Curve Prediction Control Techniques For Three-Phase Ac-Dc Buck-Type Converter With Simplified Voltage-Based Spwm /Azrita Alias, Alias Azrita

Student Works (2010-2019)

This thesis presents the design of a three-phase AC-DC buck-type converter with bidirectional capability using simplified voltage-based sinusoidal pulse-width-modulation (SPWM) switching technique. With its four diodes connected to the switch enable bidirectional power flow in each switch. The proposed topology is an extension of the conventional 6-switch three-phase AC-DC buck-type converter whereas the proposed switching technique is a simplification of conventional modified SPWM technique. It uses one reference signals (0-60° sine wave) and one type carrier signal, instead of two reference signals and two types of carrier signals to generate PWM signals. The proposed circuit configuration produces sinusoidal AC current …

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Negative Bias Temperature Instability And Permittivity Dependent Delay Mitigation In High-K Metal Oxide Compatible Cmos Dielectric / Nissar Mohammad Karim, Mohammad Karim Nissar Jan 2015

Negative Bias Temperature Instability And Permittivity Dependent Delay Mitigation In High-K Metal Oxide Compatible Cmos Dielectric / Nissar Mohammad Karim, Mohammad Karim Nissar

Student Works (2010-2019)

Negative Bias Temperature Instability (NBTI) and oxide delay are considered as threats to Complementary Metal Oxide Semiconductor (CMOS) transistors. Improving these issues result in improved performance in terms of reliability. In this thesis, to ensure reliability in transistors, the results on the basis of NBTI and oxide delay have been reported by incorporating SiO2 dielectric with different aged samples of high-K metal oxides. ZnO, TiO2 and CuO are chosen for the incorporation. NBTI occurs due to negative biasing and high temperature. And, oxide delay occurs due to high resistance and high capacitance inside dielectric. In this thesis the objectives are: …

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A Design Methodology Incorporating User Requirements And Preferences For A Successful Product / Hassan Alli, Alli Hassan Jan 2015

A Design Methodology Incorporating User Requirements And Preferences For A Successful Product / Hassan Alli, Alli Hassan

Student Works (2010-2019)

The failure of most new products on the market is almost always caused by the inability to integrate user requirements and preferences in the development of a product. It has been proven that involving the user in the development of a new product results in the success of the product. This should be done in the product definition stages of the design process, particularly in the development of the specification and characteristics of the product. Involving the user opens up possibilities for new ideas, improves product innovation, decreases the product risks, prevents it from being irrelevant and makes it pleasurable …

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Ber-Driven Resource Allocation For Multimedia Communication Over Downlink Ofdma Networks / Tham Mau Luen, Mau Luen Tham Jan 2015

Ber-Driven Resource Allocation For Multimedia Communication Over Downlink Ofdma Networks / Tham Mau Luen, Mau Luen Tham

Student Works (2010-2019)

Recent years have witnessed the growing pervasiveness of multimedia services due to significant advancements of both wireless access and multimedia compression technologies. On one hand, orthogonal frequency-division multiple access (OFDMA) is the key enabler for high-speed multiuser communications. On the other hand, nonscalable and scalable multimedia coding standards offer superior compression gains as well as strong adaptabilities to channel variations. The inherent error-prone nature of channel environments, the wireless resource scarcity along with the variations in the importance among multimedia packets, however, render the quality-of-service (QoS) provisioning for multimedia communication over wireless networks a challenging task. Leveraging multiple target bit-error-rates …

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Utilization Of Functionally Graded Materials In Femoral Prosthesis / Azim Ataollahi Oshkour, Oshkour Azim Ataollahi Jan 2015

Utilization Of Functionally Graded Materials In Femoral Prosthesis / Azim Ataollahi Oshkour, Oshkour Azim Ataollahi

Student Works (2010-2019)

Total hip replacement is a highly effective surgical operation that relieves pain and restores the function of a degenerated hip joint. However, with the increasing incidence of total hip replacements, particularly among young patients, and femoral prosthesis implantation, implant designs should consider long-term survival and better performance. Minimizing the mismatch between the prosthesis and bone stiffness to reduce stress shielding and retain interface stresses within acceptable levels, can increase the longevity of total hip replacement and enhance the performance of the prosthesis. A prosthesis with adjustable stiffness may enable prosthetists to match the prosthesis and bone stiffness. Functionally graded materials …

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Energy, Heat Transfer And Economic Analysis Of Flat-Plate Solar Collector Utilizing Sio2 Nanofluid / Mohd Faizal Fauzan, Fauzan Mohd Faizal Jan 2015

Energy, Heat Transfer And Economic Analysis Of Flat-Plate Solar Collector Utilizing Sio2 Nanofluid / Mohd Faizal Fauzan, Fauzan Mohd Faizal

Student Works (2010-2019)

Solar thermal energy can be a good replacement for fossil fuel because it is clean and sustainable. However, the current solar technology is still not efficient and expensive. The effective way to increase the efficiency of solar collector is to use nanofluid. This study is carried out to analyze the impact on thermal performance, heat transfer and economic of a flat-plate solar collector when SiO2 nanofluid utilized as working fluid. The analysis is based on different volume flow rates and varying nanoparticles volume fractions. From the numerical study, it can be revealed that CuO have the highest thermal efficiency enhancement …

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Electrodeposition And Characterization Of Sn-Bi Lead-Free Soldier Alloys / Goh Yingxin, Ying Xin Goh Jan 2015

Electrodeposition And Characterization Of Sn-Bi Lead-Free Soldier Alloys / Goh Yingxin, Ying Xin Goh

Student Works (2010-2019)

Tin-bismuth eutectic alloy (Sn-58 wt.% Bi) is emerging as a potential lead-free solder alternative. The low melting temperature (138oC) of this alloy makes it a suitable candidate for higher level interconnections and for soldering heat sensitive components. Demands for high density interconnections led to the development of electroplating technique in soldering. In this work, a methane sulfonic acid (MSA) based plating bath is developed for the electrodeposition of Sn-Bi solder alloys. Composition control of the alloy is hampered by the large potential gap between the two elements. Electrolyte additives were incorporated to assist the simultaneous deposition of Sn and Bi. …

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Dengue Rapid Diagnostic Via Surface Plasmon Resonance Biosensor / Peyman Jahanshahi, Jahanshahi Peyman Jan 2015

Dengue Rapid Diagnostic Via Surface Plasmon Resonance Biosensor / Peyman Jahanshahi, Jahanshahi Peyman

Student Works (2010-2019)

The aim of this thesis is to introduce an optical technique which can be utilized in detection of dengue virus rapidly. This technique involves the application of analytical and numerical electromagnetic simulations led by physical insight and theoretical knowledge. As a part of this study, the most common permittivity function models are compared and the best model is identified for the proposed biosensor structure. The best model (Brendel-Bormann) is found to have an accuracy of ~94.4% with respect to experimental data. On the other hand, Finite Element Method (FEM) is found to be a valuable tool in the numerical solutions …

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Power Management System For Smart Microgrid Considering Meteorological And Load Demand Data / Sam Koohikamali, Koohikamali Sam Jan 2015

Power Management System For Smart Microgrid Considering Meteorological And Load Demand Data / Sam Koohikamali, Koohikamali Sam

Student Works (2010-2019)

Integration of utility scaled solar electricity generator into power networks can negatively affect the performance of next generation smart grid. Rapidly changing output power of this kind is unpredictable and thus one solution is to mitigate it by short-term to mid-term electrical storage systems like battery. For this purpose, the battery storage system should be dispatched properly by a power management system (PMS) and hence the main objective of this work is to propose a PMS for smart microgrid (MG) applications. Microgrid refers to a cluster of generation, load, and energy storage units which can operate in grid-connected and/or in …

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Influences Of Seepage Into Walls, Curvature And Bifurcation On Pressure Drop Calculation In Idealized Arteries : A Computational Fluid Dynamics Approach / Govindaraju Kalimuthu, Kalimuthu Govindaraju Jan 2015

Influences Of Seepage Into Walls, Curvature And Bifurcation On Pressure Drop Calculation In Idealized Arteries : A Computational Fluid Dynamics Approach / Govindaraju Kalimuthu, Kalimuthu Govindaraju

Student Works (2010-2019)

Evaluation of physiological significance of coronary stenosis severity is of great importance than the anatomical significance to identify potentially ischemic stenosis for revascularization whereas non-culprit stenosis has been deferred from stenting. In a clinical settings, the functional severity of the stenosis is evaluated by fractional flow reserve (FFR) which is derived from mean pressure drop ( p ~  ) across the stenosis. The other parameters such as Pressure Drop Coefficient (CDP) and Lesion Flow Coefficient (LFC) which are derived from fluid dynamic principles also useful to evaluate the functional severity of the stenosis. The diagnostic accuracy of measuring severity …

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Shape Stabilized Composite Phase Change Materials For Thermal Energy Storage Systems / Mohammad Mehrali, Mehrali Mohammad Jan 2015

Shape Stabilized Composite Phase Change Materials For Thermal Energy Storage Systems / Mohammad Mehrali, Mehrali Mohammad

Student Works (2010-2019)

Phase change materials (PCMs) used for the storage of thermal energy as sensible and latent heat are an important class of modern materials which substantially contribute to the efficient use and conservation of waste heat and solar energy. The storage of latent heat provides a greater density of energy storage with a smaller temperature difference between storing and releasing heat than the sensible heat storage method. The main problems with most inorganic PCM materials are their incongruent melting and supercooling effects. Organic PCMs have a high thermal storage capability and also other properties such as good thermal stability and little …

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Development Of Thulium-Doped And Co-Doped Fiber Lasers For 1.9 Micron Region Operation / Norazlina Saidin, Saidin Norazlina Jan 2015

Development Of Thulium-Doped And Co-Doped Fiber Lasers For 1.9 Micron Region Operation / Norazlina Saidin, Saidin Norazlina

Student Works (2010-2019)

1.9 μm fiber lasers offer numerous applications in the area of spectroscopy, military and medical field. Thulium doped fiber has been used in order to realize laser applications in this region. Various methods have been implemented to achieve high output power as well as low threshold pump power for the laser’s applications. Other than being used for continuous wave operation, pulse lasers are also important in various fields of applications including high-precision material processing, biomedicine and ranging. This thesis thoroughly describes the development of 1.9 μm fiber lasers based on thulium doped and co-doped fibers as the gain medium. Two …

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An Integrated Approach For Techno-Economic And Environmental Analysis Of Power Generation From Paddy Residue In Malaysia / Shafini Mohd Shafie, Mohd Shafie Shafini Jan 2015

An Integrated Approach For Techno-Economic And Environmental Analysis Of Power Generation From Paddy Residue In Malaysia / Shafini Mohd Shafie, Mohd Shafie Shafini

Student Works (2010-2019)

Malaysia is blessed with abundant biomass residue that can potentially be used as a source of electricity generation. One of them is paddy residues. Annually about 3.66 million tonne of paddy residue is left in the fields. Towards year 2020 this value is forecasted to increase to 7 million tonne per year due to emerging technology development in agriculture industries. Paddy residue can potentially be used as feedstock fuel for electricity generation in Malaysia. However, the techno-economic study on paddy residue based power generation for Malaysia condition is still limited. Therefore, this thesis explores the non-technical aspect regarding the potential …

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Effect Of Ultrasonication On Colloidal Thermophysical And Rheological Properties Of Alumina-Water Nanofluid / Mohammed Mahbubul Islam, Mahbubul Islam Mohammed Jan 2015

Effect Of Ultrasonication On Colloidal Thermophysical And Rheological Properties Of Alumina-Water Nanofluid / Mohammed Mahbubul Islam, Mahbubul Islam Mohammed

Student Works (2010-2019)

Nanofluids are promising fluids for heat transfer applications. Low stability and high viscosity are two important drawbacks for practical applications of nanofluids. The aggregation and sedimentation of nanoparticles are related to the colloidal dispersion characteristics, which directly affect the stability and thermophysical properties. An ultrasonic homogenizer can break the aggregation of particles and disperse them into a fluid to improve the stability of the suspension. Therefore, sound energy is needed to improve thermal energy. However, the research question is whether the improvement achieved in thermal application is feasible for the amount of used ultrasound energy. The aim of this research …

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Development And Application Of Technical And Economic Strategies In Upgrading Heavy Oil: The Case Of Iran / Nooshin Jabbari, Jabbari Nooshin Jan 2015

Development And Application Of Technical And Economic Strategies In Upgrading Heavy Oil: The Case Of Iran / Nooshin Jabbari, Jabbari Nooshin

Student Works (2010-2019)

Nowadays, due to the increasing demand for energy at an alarming rate, the alternative resources of energy are being explored to compensate the depleting conventional energy resources. One such alternative, if the upgrading processes are effectively managed, could be heavy crude oil. Iran is endowed with large resources of both conventional and unconventional Oil. However Due to the decrease in the conventional resources in Iran, the National Iranian Oil Company (NIOC) has been compelled to resort to the unconventional oil resources. However, the transition to heavier and sourer oil resources results in some technical, economic and environmental challenges for the …

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Kinetic Mechanism And Equilibrium Thermodynamic Of Lipase Catalyzed Synthesis Of Rutin Flavonoid Ester / Nurul Nadiah Abd Razak, Abd Razak Nurul Nadiah Jan 2015

Kinetic Mechanism And Equilibrium Thermodynamic Of Lipase Catalyzed Synthesis Of Rutin Flavonoid Ester / Nurul Nadiah Abd Razak, Abd Razak Nurul Nadiah

Student Works (2010-2019)

Flavonoids are natural compounds in plant with wide spectrum of healthbeneficial activities. They exhibit a variety of physico-chemical properties and biological activities but they are normally characterized by low solubility and stability. In order to improve upon these limitations, the enzymatic acylation of these molecules with fatty acids is seen as a selective, specific and mild route. In this study, the synthesis of flavonoid esters catalyzed by lipase was investigated. Three different flavonoid structures from different classes were selected to be studied viz. rutin (flavonols), naringin (flavanones) and catechin (flavanols). The effects of these flavonoid structures on the esterification were …

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Development And Validation Of The Technology Adoption And Gratification (Tag) Model In Assessing Lecturers’ Ict Use / A.Y.M. Atiquil Islam, Atiquil Islam A.Y.M. Jan 2015

Development And Validation Of The Technology Adoption And Gratification (Tag) Model In Assessing Lecturers’ Ict Use / A.Y.M. Atiquil Islam, Atiquil Islam A.Y.M.

Student Works (2010-2019)

In this age of exponential knowledge growth, where Information and Communication Technology (ICT) has been playing a dominant role, the authorities of Higher Education concerned have to ensure that the ICT facilities remain within the reach of the lecturers for their teaching and research purposes. However, despite a decade of existence, the ICT facilities were found to be underutilized by lecturers. Constructs such as computer self-efficacy, perceived ease of use, perceived usefulness, use and gratification were hypothesized to be major barriers. In doing so, the prime objective of this study was to develop and validate the Technology Adoption and Gratification …

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Synthesis And Characterization Of Polyaniline For Hydrazine Detection / Kavirajaa Pandian Sambasevam, Sambasevam Kavirajaa Pandian Jan 2015

Synthesis And Characterization Of Polyaniline For Hydrazine Detection / Kavirajaa Pandian Sambasevam, Sambasevam Kavirajaa Pandian

Student Works (2010-2019)

Among the conducting polymers, polyaniline (PAni) is studied most extensively due to the ease of synthesis, high conductivity and low production cost. Hydrazine from fuels, pesticide and corrosion inhibitor industries are a toxic compound which can cause neurotoxicity and carcinogenicity. In this study, a series of PAni were synthesized and applied as a chemical sensor for hydrazine detection. The sensor responses of PAni were monitored by ultraviolet-visible (UV-Vis) analysis in hydrazine detection. Besides, the sensor response was supported by conductivity study and Fourier transform infrared (FTIR) analysis to identify the chemical interaction between the PAni and the hydrazine. Doped-PAni were …

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Chemical Constituents From The Rhizomes Of Curcuma Zedoaria And Curcuma Purpurascens And Assessment Of Their Biological Activities / Omer Abdalla Ahmed Hamdi, Ahmed Hamdi Omer Abdalla Jan 2015

Chemical Constituents From The Rhizomes Of Curcuma Zedoaria And Curcuma Purpurascens And Assessment Of Their Biological Activities / Omer Abdalla Ahmed Hamdi, Ahmed Hamdi Omer Abdalla

Student Works (2010-2019)

Curcuma zedoaria (Christm.) Rosc. (local name: Temu putih) and Curcuma purpurascens are two medicinally important plants of the genus Curucma and grow abundantly in Asian countries including Malaysia and Indonesia. These two plants are extensively used in the traditional medicinal practice of Malaysia and many other countries of the world for the treatment of various ailments. Phytochemical investigation of the rhizomes of C. zedoaria and C. purpurascens resulted in the isolation of 27 compounds. C. zedoaria afforded eighteen sesquiterpenes, including eight germacrane type (dehydrocurdione 19, curdione 20, furanodiene 21, furanodienone 22, germacrone 23, germacrone 4,5-epoxide 24, germacrone 1,10-epoxide 25, and …

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