M. Nabil Salimi

University of Malaysia, Perlis | unimap · School of Bioprocess Engineering

Graphitic carbon is a valuable material that can be utilized in many fields, such as electronics, energy storage and wastewater filtration. Due to the high demand for commercial graphite, an alternative raw material with lower costs that is environmentally friendly has been explored. Amongst these, an agricultural bio-waste material has become an o...

Luminosity and contrast variation problems are among the most challenging tasks in the image processing field, significantly improving image quality. Enhancement is implemented by adjusting the dark or bright intensity to improve the quality of the images and increase the segmentation performance. Recently, numerous methods had been proposed to nor...

Malaria is a very serious disease that caused by the transmitted of parasites through the bites of infected Anopheles mosquito. Malaria death cases can be reduced and prevented through early diagnosis and prompt treatment. A fast and easy-to-use method, with high performance is required to differentiate malaria from non-malarial fevers. Manual exam...

Vascular injury and disease as well as cardiac and cardiovascular diseases have been a serious threat to human life and health today. Stents implantation have been the primary treatment for vascular diseases. Polymeric bioresorbable stents manufactured with 3D printer is newly emerged. This work review the bioresorbable stents and the utilization o...

This work reviews the key features and capabilities of additive manufacturing, which include the fundamental of additive manufacturing followed by types of additive manufacturing technologies. Advantages and limitation of additive manufacturing is discussed and the emergence of additive manufacturing in industrial revolution 4.0 is presented. Econo...

Laser welding on dissimilar materials is widely used and has significance application in industry. Laser welding is the one of the method which can offer high strength of joint especially for joining of dissimilar metals contrast to conventional method. Conventional welding more often had an insufficient penetration depth and a wider heat affected...

The production of strontium oxide nanoparticles from an aquatic plant extract is described here. UV–vis spectroscopy at ~ 220 nm was used to confirm the biosynthesis of these particles, and the color of the mixtures altered from colorless to green. The morphology of Elodea canadensis strontium oxide nanoparticles (EcSrONPs) was characterized using...

The importance of nanotechnology in medical applications especially with biomedical sensing devices is undoubted. Several medical diagnostics have been developed by taking the advantage of nanomaterials, especially with electrical biosensors. Biosensors have been predominantly used for the quantification of different clinical biomarkers toward dete...

The main aim of this research project is to develop computer-based modelling of the cell cycle as a cell signaling network. This is done as to obtain analytical results based on computer modelling as opposed to the traditional method by experimental lab works. It is also done as to prove that computer-based modelling could give similar results as p...

Hydroxyapatite (HAp), [Ca10(PO4)6(OH)2] has been increasingly in demand and extensively used in biomedical field. Optimization and characterization studies were carried out on the production of HAp nanoparticles by direct precipitation method. Calcium hydroxide [Ca(OH)2] and orthophosphoric acid (H3PO4) were used as precursors which are dissolved i...

This study represents the surface charge transduction, an efficient and inexpensive biosensor with modifications by silica-alumina entities and determination of gene sequence hybridization. The sensing surface was made by the planar aluminium interdigitated electrode on silicon substrate. Silica and alumina nanoparticles were engineered on the plan...

In this study, biological deoxygenation of graphene oxide (GO) using an Eclipta prostrata phytoextract was performed via the infusion method. The presence of oxide groups on the surface of graphene and removal of oxides groups by reduction were characterized through morphological and structural analyses. Field emission scanning electron microscopy...

The aim of this work was to produce glucose from sugarcane waste. It consists of high cellulose, hemicellulose and lignin which enables to be converted into a glucose production. Three conditions of acid hydrolysis was measured by using One Factor at a Time (OFAT) which consist of sulphuric acid concentration, retention time and temperature. The hi...

The aim of this work was to optimize the condition of pretreatment and enzymatic hydrolysis for high yield of sugar production of spent coffee ground (SCG). Acid and alkaline pretreatment method were compared and the method with more sugar produced was selected. Response surface methodology was use for the analysis of conditions such as concentrati...

In Malaysia, the first Iodine Deficiency Disorders (IDD) survey was conducted in 1996 and it was discovered that Peninsular Malaysia did not have IDD problem until latter studies showed goitre occurrence of 34.7% in Hulu Langat district and urinary iodine lower than the adequate level of (100-199 ug/L) in Perak and Pahang states (Selamat et al., 20...

Iron Oxide Nanoparticle, maghemite (γ-Fe2O3) has received great interest and extensively used in biomedical field. Optimization studies were carried out in the production of γ-Fe2O3 nanoparticles by using co-precipitation method. Iron (II) chloride and iron (III) chloride were used as precursors which are dissolved in distilled water followed by ce...

A five-Port Reflectometer (FPR) with the integration of ultra-wideband (UWB) Epsilon Negative (ENG) Double Split Ring Resonator (DSRR) metamaterial array is introduced in this paper for microwave imaging (MWI) application. The designed DSRR consists of two concentric rings with a split in each which are spatially rotated by 180°, formed an inverted...

Chemotherapeutic drug in the treatment of cancer is the developing strategy that includes the usage of herbal catechin, is being explored to get more insights. On the other hand, the broad dispersal of flavonoid compounds invariably restricts the therapeutic dosage of the drug at the point of delivery. This study is creating an effective transport...

Rice blast disease, caused by the fungus known as Pyricularia oryzae, has become an important and serious disease of rice worldwide. Around 50% of production may be lost in a field moderately affected by infection and each year the fungus destroys rice, which is enough to feed an estimated 60 million people. Therefore, use of herbal plants offer an...

The great performance of magnetite nanoparticle in varsity field are mainly depended on their size since size determine the saturation magnetisation and also the phase purity. Magnetite nanoparticles were prepared using a simple co-precipitation method in order to study the influence of synthesis condition on the final size. Variable parameters inc...

Iron oxide nanoparticles excite researcher interest in biomedical applications due to their low cost, biocompatibility and superparamagnetism properties. Magnetic iron oxide especially magnetite (Fe3O4) possessed a superparamagnetic behaviour at certain nanosize which beneficial for drug and gene delivery, diagnosis and imaging. The properties of n...

Magnetite’s abilities rely on the quantitative phases present in the sample. Magnetite quality can strongly influence several physical properties, such as magnetism, catalytic performance, and Verwey transition. However, differentiation of magnetite and maghemite through the conventional X-ray diffractogram comparison are not relevant for the inter...

Herbal plants have several potential antimicrobial activities either as antifungal or antibacterial to fight against the disease and pathogen that attack the plants. The extractions of the Aloe vera leaf, Citrus hystrix leaf, Zingiber officinale rhizome and Sabah snake grass were selected in this study to fight against Bacillus subtilis. B. subtili...

Magnetic transportation of therapeutic agents to the infected site in the body promises a superb platform for cancer treatment. To increase the safety profile and to stay clear from the agglomeration issue, core shell structure of magnetite-hydroxyapatite (Fe3O4-HAp) nanoparticles was developed. Fe3O4 as the core was synthesised by coprecipitation...

The demand of production of hydroxyapatite (HA) has been increasing for the purpose of medical and dental application. HA possesses the excellent properties leads to the priority choice for ceramic bone replacement. Synthesis route by wet chemical precipitation is commonly practised in industrial scale. Calcium hydroxide and Orthophosphoric acid ar...

Gold-mining activities have been an issue, especially when it involves in contamination of chemicals, for example arsenic and mercury. However, despite of these hazards, gold-mining activities are still being conducted. This is because the gold is worth, regardless of the problems. Gold-mining, as known needs a very large area of land, or site plan...

Magnetite nanoparticles were prepared by co-precipitation method at different precipitation temperature and pH of solution. The produced inverse spinel cubic structure can be denoted to magnetite structure as deduced from X–ray diffraction (XRD) result. X-ray peak broadening analysis was utilized to determine the crystallite sizes and lattice strai...

Rice husks, a complex lignocellulosic biomass which comprised of high cellulose content (38-50%), hemicellulose (23-32%) and lignin (15-25%) possesses the potential to pursue as low cost feedstock for production of ethanol. Dilute sulfuric acid at concentration of 1, 2, 3 (%, v/v) were used for pretreatments at varied hydrolysis time (15-60 min) an...

Paddy straw is one of the most abundant lignocellulose wastes and has potential as a feedstock for sugar production. In this study, dilute acid pretreatment and enzymatic hydrolysis are the process that selected for the production of sugar. The paddy straw was pretreated with 1% (v/v) of sulfuric acid at 95 °C for 60 minutes followed by enzymatic h...

Gene therapy is a promising therapeutic approach for treating cancer but the efficiency delivery of genes to desired locations with minimal side effects remains a challenge. Here, we report on the development of magnetic iron oxide (Fe3O4) nanoparticles which the magnetismproperties possessed by magnetic Fe3O4nanoparticles improved the delivery pro...

The focus of bone graft properties has developed through generations, from the ability to withstand mechanical stress to the ability to integrate with the biological structure. In recent years, the use of hydroxyapatite (HA) as bone graft material in orthopedic and dental applications has been increasing. HA is a natural occuring mineral with excel...

Gold-mining activities have been an issue, especially when it involves in contamination of chemicals, for example arsenic and mercury. However, despite of these hazards, gold-mining activities are still being conducted. This is because the gold is worth, regardless of the problems. Gold-mining, as known needs a very large area of land, or site plan...

Many studies have been carried out in order to prepare hydroxyapatite (HAp) by various methods. In this study, we focused on the preparation of HAp nanoparticles by using sol-gel technique in which few parameters are optimized which were stirring rate, aging time and sintering temperature. HAp nanoparticles were prepared by using precursors of calc...

This paper proposes a multiple input multiple output (MIMO) array antenna operating at 5.8 GHz using multiple layers of bendable Polydimethylsiloxane (PDMS) substrate. It features favorable mechanical properties such as flexibility, softness, water resistance and transparency. Moreover, its dielectric properties can be modified by loading the PDMS...

Immobilized cell reactor (ICR) has been used widely for bioethanol production. It has been shown to improve the performance of fermentation efficiency. The immobilization of S.cerevisiae was simply performed by enriched cells cultured media harvested at exponential growth phase. Hydroxyapatite (HAp) was found to be a suitable candidate as a solid s...

The most common gene vectors used are virus based (viral gene vectors). These possess high immunological risk, so a non-viral gene vector maybe preferable. Nanocrystalline hydroxyapatite, HAp [Ca10(PO4)6(OH)2] is an example of a possible non-viral gene vector. This is due to its good biocompatibility, bioactivity and proven results as a non -viral...

A pure ceramic powder of hydroxyapatite, Hap [Ca10(PO4)6(OH)2] can be produced by low temperature method namely sol-gel route. The sol-gel route is one of wet chemical synthesis techniques which produce the useful biomaterial particles. The production of HAp particles were carried out by varying the stirring speed from 100 to 500 rpm and sintering...

A patch antenna design for switchable beam steer ability is proposed in this research. The presented antenna has successfully achieved beam steer functionality at four angle directions of +179°, -14°, +3° and 14°. The novel design of spiral feed network and differences of radiating element sizes have eventually helped to steer the main lobe radiati...

In this work, extraction of the oleic acid from the palm pressed fiber using supercritical carbon dioxide was studied at conditions of temperatures from 313.15 to 353.15 K and at pressures from 60 to 120 bars. Residual fibers from palm oil production contain more than 5% of the palm oil, which is a good source of oleic acid. The activity coefficien...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of superstrate and compares the results between the original patch and the patch with superstrate layer but without dots. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of using superstrat...

A single-coaxial feed circularly polarized (CP) patch antenna is designed using the U-slot patch technique. With the presence of U-slot, the antenna patch on 3 layers of FR-4 substrate (dielectric constant = 4.7), is able to cover the range of frequency of 2.28 to 2.58 GHz. The size of patch 0.21λ X 0.21λ, while the ground is 0.39λ X 0.39λ, and the...

This paper discuss about designing a dual frequencies monopole antenna with side feed. The antenna is required to operate at a frequency of 2.3 GHz and 2.45 GHz simultaneously. This proposed antenna is designed based on T-Slot antenna. With combination of stub at the left, it is observed that the capabilities of dual band frequencies have been succ...

This paper describes the design of multiple element of co-polarization elliptical patch antenna operating at 2.45GHz. Computer Simulation Technology (CST) Microwave Studio is used as an effective tool for 3D electromagnetic simulation of high frequency design. In this paper, different dimensions with three elliptical shaped slots are implemented an...

A circular polarization corporate feed antenna with dual frequencies of 1.575 GHz and 2.3 GHz is presented in this research. The antenna consists of 2 circular radiating patches with the transmission line are divided into two branches. Two different circular patches are able to produce two different frequencies with circular polarization (CP) capac...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch with parasitic ring mounted on foam. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of using parasiti...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch with parasitic element mounted on superstrate. 5.8 GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of usi...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch without dots stacked with parasitic element mounted on foam. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. The p...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch without dots stacked with parasitic element mounted on a high dielectric substrate. 5.8GHz is the reference or desired frequency set for measuring the performance...

This paper introduces the performance of an elliptical shaped antenna with random slots and compares the results between the original patch and the patch without dots. 5.8GHz is the reference or desired frequency set for measuring the performance of this antenna. For the design, three elliptical shaped slots with different dimensions are deployed a...

This paper presents a triple-frequencies of co-polarization Yagi Patch antenna dropped at desired frequency 2.3 GHz, 2.4 GHz and 5.8 GHz. Computer Simulation Technology (CST) Microwave Studio will be introduce as an effective tool for 3D electromagnetic simulation of high frequency components. The analysis on performance will be based on the obtain...

This paper introduces the performance of an elliptical shaped antenna with random slots and compares the results between the original patch and the patch without both dots and connector. 5.8 GHz is the reference or desired frequency set for measuring the performance of this antenna. For the design, three elliptical shaped slots with different dimen...

This paper introduces the performance of an elliptical shaped antenna with random slots with the use of parasitic element and compares the results between the original patch and the patch with parasitic element mounted on superstrate. 5.8 GHz is the reference or desired frequency set for measuring the performance of this antenna. The purpose of usi...