- UTM RAZAK School of Engineering and Advanced Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur
- Universiti Teknologi Malaysia - UTM, Faculty of Bioscience and Bioengineering, Graduate Studentadd
- Dr.Hesam Kamyab is a Postdoctoral Fellowship (Research & Teaching) at the Malaysia-Japan International Institute of T... moreDr.Hesam Kamyab is a Postdoctoral Fellowship (Research & Teaching) at the Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia in 2021. Dr. Kamyab was Visiting Researcher Scholar at Universiti Teknologi Malaysia (UTM) in 2020. He was completed Postdoctoral Research Fellow for 3 years in the Department of Engineering at UTM in 2017. He was appointed as a visiting researcher from the University of Illinois Chicago (UIC) in 2016. He obtained a Master of Bioscience and Bioengineering (Biotechnology) at Universiti Teknologi Malaysia (UTM). He earned a Ph.D. in Civil Engineering in the field of Environmental Engineering at Universiti Teknologi Malaysia (UTM). He was awarded the Young Water Professional Awards by International Water Association (IWA-YWP) in 2014 in Taipei, Taiwan. Moreover, He received an Outstanding Reviewer Award in the Journal of Cleaner Production (Elsevier) and Clean Technologies Environmental Policy (Springer) in 2017. He was appointed as the Junior Board Member in the Journal of Cleaner Production, Elsevier (IF: 9.297) following his active paper review role. Also, he was appointed as managing guest editor in Energy Journal, Elsevier (IF: 7.147), guest editor in Environmental Science and Pollution Research, Springer (IF: 4.223), and guest editor in Sustainability Journal, MDPI (IF: 3.251). He has a chair in IWA Emerging Water Leader (EWL). He has published more than 100 papers in reputed journals and has been serving as an editorial board member of repute.edit
Magnetic nanocomposites are multi-component, nanosized magnetic materials, to generate the response to an external stimulus (i.e., outer inert or alternative magnetic field). The novel nanocomposites is a combination of excess of various... more
Magnetic nanocomposites are multi-component, nanosized magnetic materials, to generate the response to an external stimulus (i.e., outer inert or alternative magnetic field). The novel nanocomposites is a combination of excess of various materials such as liquid crystals, silica, gels, renewable polymers, carbon along with different magnetic particles. They have immense applications in the field of medical diagnosis and therapy, catalysis and separation. These nanocarriers are mainly classified into nanotubes, nanosheets, spherical nanoparticles, nanofibres, highly porous nanocomposites. The porous nanostructures provides a better surface for the entrapment or covalent binding of enzymes, proteins, biomolecules and drugs but the major challenge is to design and synthesize a desired structure with suitable surface properties and biocompatibility. Extensive attempts have been made to manipulate the mesoporous materials and its combination with other structure in order to synthesize a matrix with appropriate pore size, large surface area to volume ratio. “Bottom-up” and “Bottom-down” chemical-based synthesis methods have been widely employed to prepare magnetic nanoparticles. Magnetic nanocomposites are synthesized from magnetic nanoparticles and biopolymers by using sol-gel technique, chemical precipitation methods and NanogenTM, a microwave plasma method. In this chapter, we described the advances and developments in the formation/synthesis of magnetic nanocomposites. This chapter will review the characteristics, properties and applications of the magnetic nanocomposites.
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Gestational diabetes mellitus is a serious global problem and needs urgent attention. Aberrant microRNAs expression is potentially disease-specific and may contribute to GDM pathological processes. Even though GDM is diagnosed at the end... more
Gestational diabetes mellitus is a serious global problem and needs urgent attention. Aberrant microRNAs expression is potentially disease-specific and may contribute to GDM pathological processes. Even though GDM is diagnosed at the end of the second or beginning of the third trimester, there is no way to prevent pathological changes that may occur during the first and second trimesters. Therefore, to identify a specific miRNAs expression and their predicted target genes in maternal serum subjected with GDM in especially early stage, we performed miRNA expression profiling using miRNA PCR Array and in-silico analysis. In this study, demographic data and miRNAs expression levels and their specific potential as biomarkers were investigated. The findings showed that the expression levels of hsa-miR-193a, hsa-miR-21, hsa-miR-23a, and hsa-miR-361 are significantly upregulated while miR-130a is significantly downregulated in GDM patients. The ROC curve analysis revealed that hsa-miR-193a...
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In this study, a composite material consisting of three-dimensional graphene aerogel and iron oxide nanoparticles (3DG/Fe3O4) was created and utilized for the purpose of magnetic solid-phase extraction (MSPE) of thirteen polycyclic... more
In this study, a composite material consisting of three-dimensional graphene aerogel and iron oxide nanoparticles (3DG/Fe3O4) was created and utilized for the purpose of magnetic solid-phase extraction (MSPE) of thirteen polycyclic aromatic hydrocarbon (PAH) compounds via gas chromatography–mass spectrometry/selected ion monitoring (GC-MS/SIM) analysis. The synthesized adsorbent underwent a range of characterization techniques, including scanning electron microscopy, vibrating sample magnetometry, Raman spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller, Fourier transform-infrared spectroscopy, and Barrett–Joyner–Halenda techniques, to examine its properties and morphology. The synthesized adsorbent integrates the benefits of superior adsorption capacity from modified graphene oxide (GO) with the magnetic separability of magnetite microparticles, resulting in a high adsorption capacity with easy separation from sample solutions. The efficiency of the proposed method was optimiz...
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ABSTRACT Greenhouse gases (GHG) emission from industry is one of the potent contributors to the global warming. In industry, the source of carbon emissions related to an industry premise can be categorized into two major types, i.e.,... more
ABSTRACT Greenhouse gases (GHG) emission from industry is one of the potent contributors to the global warming. In industry, the source of carbon emissions related to an industry premise can be categorized into two major types, i.e., direct carbon emission source related to the on-site carbon emission, for instance the emission due to fuel combustion within the premises itself and indirect carbon emission source that is related to the carbon emission at external premises, due to the resource consumption within the business premises. For instance, electricity, fuel consumption, water consumption, solid waste and waste water will lead to the carbon emission at the power plant, due to the power generation requirement to treat and handle these resource and waste. Therefore, all these five main criteria, i.e., electricity, fuel consumption, water consumption, solid waste and waste water will be selected as carbon performance indicators (CPI). In this study, an integrated carbon accounting and mitigation (INCAM) framework is developed and may serve twofold purposes, tracking of emission in onsite specific area and identify potential emissions reduction strategy in a holistic manner. The systematic steps to develop INCAM includes (1) Define carbon accounting centre (CAC) (2) Establish carbon emission indicators (CEI) for each CAC and CPI (3) Identify the hot spot for each CAC (4) Propose emission reduction strategies and rank emission mitigation measures according to cost effectiveness. INCAM provides relevant information that makes carbon profiling visible to various levels of an organization, enabling industry to plan, make decisions and take effective action to reduce emission towards greening the industry.
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Biological means of hydrogen (H2) production has attracted tremendous research and development attention. Dark fermentation provides a possible way of producing H2 from a range of renewable energy sources, including wastewater. During... more
Biological means of hydrogen (H2) production has attracted tremendous research and development attention. Dark fermentation provides a possible way of producing H2 from a range of renewable energy sources, including wastewater. During fermentation, various metabolites are formed to create a complex metabolic flux network. Insufficient focus has been placed on the metabolic engineering that is intrinsic to fermentation. This current review summarizes the biochemical pathways occurring in the metabolic network of dark fermentation and how the key operational factors influence metabolism during dark fermentation. Recent developments and strategies for metabolic engineering that have been described to enhance H2 production are recommended. Finally, the economic analysis related to bio-H2 production and prospects is examined. It is envisaged that this study can give beneficial aspects in terms of fundamental knowledge, understanding, and the latest technology for scientists and research engineers in the field of bio-based H2 generation.
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The development of novel antifungal agents and, in particular, the widespread use of these medications over the course of the past two decades, has had a significant impact on the treatment of fungal infectious diseases. This has resulted... more
The development of novel antifungal agents and, in particular, the widespread use of these medications over the course of the past two decades, has had a significant impact on the treatment of fungal infectious diseases. This has resulted in a complete transformation of the treatment of fungal infectious diseases. However, the widespread development of antibiotic resistance has masked the significance of such breakthroughs. Antifungal infection treatment with nanoparticles has been shown to be effective. As a result of their unique characteristics, these substances, in contrast to antibiotics in their purest form, are able to exhibit an increased anti-proliferative capacity while requiring a lower concentration than traditional drugs do in order to achieve the same effect. Decreased drug effectiveness, minimal tissue penetration throughout tissue, restricted tissue penetration, decreased bioavailability, poor drug pharmacokinetics, and low water solubility are some of the major fact...
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The introduction of bioactive glasses (BGs) precipitated a paradigm shift in the medical industry and opened the path for the development of contemporary regenerative medicine driven by biomaterials. This composition can bond to live bone... more
The introduction of bioactive glasses (BGs) precipitated a paradigm shift in the medical industry and opened the path for the development of contemporary regenerative medicine driven by biomaterials. This composition can bond to live bone and can induce osteogenesis by the release of physiologically active ions. 45S5 BG products have been transplanted effectively into millions of patients around the world, primarily to repair bone and dental defects. Over the years, many other BG compositions have been introduced as innovative biomaterials for repairing soft tissue and delivering drugs. When research first started, many of the accomplishments that have been made today were unimaginable. It appears that the true capacity of BGs has not yet been realized. Because of this, research involving BGs is extremely fascinating. However, to be successful, it requires interdisciplinary cooperation between physicians, glass chemists, and bioengineers. The present paper gives a picture of the existing clinical uses of BGs and illustrates key difficulties deserving to be faced in the future. The challenges range from the potential for BGs to be used in a wide variety of applications. We have high hopes that this paper will be of use to both novice researchers, who are just beginning their journey into the world of BGs, as well as seasoned scientists, in that it will promote conversation regarding potential additional investigation and lead to the discovery of innovative medical applications for BGs.
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An anaerobic membrane bioreactor (AnMBR) was employed as primary treatment unit for anaerobic treatment of simulated wastewater to produce high effluent quality. A lab scale hollow fiber membrane was used to scrutinize the performance of... more
An anaerobic membrane bioreactor (AnMBR) was employed as primary treatment unit for anaerobic treatment of simulated wastewater to produce high effluent quality. A lab scale hollow fiber membrane was used to scrutinize the performance of AnMBR as a potential treatment system for simulated milk wastewater and analyze its energy recovery potential. The 15 L bioreactor was operated continuously at mesophilic conditions (35 °C) with a pH constant of 7.0. The membrane flux was in the range of 9.6–12.6 L/m2. h. The different organic loading rates (OLRs) of 1.61, 3.28, 5.01, and 8.38 g-COD/L/d, of simulated milk wastewater, were fed to the reactor and the biogas production rate was analyzed, respectively. The results revealed that the COD removal efficiencies of 99.54 ± 0.001% were achieved at the OLR of 5.01 gCOD/L/d. The highest methane yield was found to be at OLR of 1.61 gCOD/L/d at HRT of 30 d with the value of 0.33 ± 0.01 L-CH4/gCOD. Moreover, based on the analysis of energy balance in the AnMBR system, it was found that energy is positive at all the given HRTs. The net energy production (NEP) ranged from 2.594 to 3.268 kJ/gCOD, with a maximum NEP value of 3.268 kJ/gCOD at HRT 10 d HRT. Bioenergy recovery with the maximum energy ratio, of 4.237, was achieved with an HRT of 5 d. The study suggests a sizable energy saving with the anaerobic membrane process.
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Leachate, which refers to dark-colored toxic wastewater generated from landfills, has become an issue of environmental concern, posing a threat to soil, surface water, and groundwater quality, thereby negatively affecting humans’ health.... more
Leachate, which refers to dark-colored toxic wastewater generated from landfills, has become an issue of environmental concern, posing a threat to soil, surface water, and groundwater quality, thereby negatively affecting humans’ health. Therefore, it is necessary to select the most appropriate leachate treatment methods considering its complex properties. Among several treatment processes available for this purpose, the biological treatment process is notably effective at removing pollutants and also relatively affordable to operate. Its application to leachate treatment has received much attention in recent years. This study summarizes the leachate characteristics and the methods of leachate treatment with a focus on biological approaches, either aerobic or anaerobic. In addition, this paper concisely discusses the effectiveness and the factors influencing the performance of each treatment technology in case of organics, nutrients, and other pollutants removal. The findings of this paper are expected to provide a deeper insight into the future research and development of leachate treatment, especially the biological treatments concerning the circular economy.
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Many operating parameters of ultrafiltration (UF) are playing a crucial role when using a polyethersulfone membrane to separate xylose reductase (XR) enzyme from reaction mixtures during xylitol synthesis. The present study focuses on the... more
Many operating parameters of ultrafiltration (UF) are playing a crucial role when using a polyethersulfone membrane to separate xylose reductase (XR) enzyme from reaction mixtures during xylitol synthesis. The present study focuses on the separation of XR enzyme using a cross-flow ultrafiltration (UF) membrane. The filtration process was analyzed using the three effective variables such as filtration time, cross-flow velocity (CFV), and the transmembrane pressure (TMP), which were ranging from 0 to 100 min, 0.52 to 1.2 cm/s and 1–1.6 bar, respectively. Then, using the resistance in series model, the hydraulic resistance for alkali chemical cleaning during XR separation was estimated. During separation, increased TMP showed a positive-flux effect as a driving force, however, fouling and polarized layer were more prominent under higher TMP. Increased CFV, on the other hand, was found more efficient in fouling control. In terms of the membrane cleaning techniques, an alkaline solution containing 0.1 M sodium hydroxide was shown to be the most effective substance in removing foulants from the membrane surface in this investigation. Cleaning with an alkaline solution resulted in a maximum flux recovery of 93% for xylose reductase separation. This work may serve as a useful guide to better understand the optimization parameters during XR separation and alleviating UF membrane fouling induced during XR separation.
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Abstract Evaluating and selecting suitable low-carbon suppliers is one of the most disputed topics in different industries. Some studies have more specifically investigated the role of sustainable low-carbon suppliers in the maritime... more
Abstract Evaluating and selecting suitable low-carbon suppliers is one of the most disputed topics in different industries. Some studies have more specifically investigated the role of sustainable low-carbon suppliers in the maritime sector. In general, sustainability is recognized as a vital philosophy for many industrial sectors since it enhances environmental protection and raises people's and organizations' awareness about social obligations. Therefore, choosing low-carbon suppliers based on the sustainability perspective is important for firms and organizations in order to effectively promote sustainable supplier chain management (SSCM). The present study develops a new fuzzy decision-making approach to rank and evaluate low-carbon, sustainable suppliers (LCSS) through the integration of the Combinative Distance-Based Assessment (CODAS) framework and intuitionistic fuzzy sets (IFSs), which results in a new approach called intuitionistic fuzzy CODAS (IF-CODAS). The paper is aimed at making a decision on the IFSs context by considering the decision makers' hesitancy based on both Hamming and Euclidean distances in accordance with the anti-ideal point. To evaluate the weights of the criteria, a new discrimination measure is developed. To show the practicality of the proposed approach, a case study for the assessment of low carbon sustainable suppliers is presented. To validate the developed approach, comparative research and sensitivity analysis were conducted in this study. The evaluation results showed that the fourth low-carbon sustainable supplier with a maximum assessment score degree (0.4747) using the proposed method was found the best option for selecting LCSS based on the sustainability perspective. Furthermore, the sensitivity analysis was made to observe the difference of alternative ranking when the importance values of criteria weights change.
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In recent years, mesoporous silica nanoparticles (MSNs) have been applied in various biomedicine fields like bioimaging, drug delivery, and antibacterial alternatives. MSNs could be manufactured through green synthetic methods as... more
In recent years, mesoporous silica nanoparticles (MSNs) have been applied in various biomedicine fields like bioimaging, drug delivery, and antibacterial alternatives. MSNs could be manufactured through green synthetic methods as environmentally friendly and sustainable synthesis approaches, to improve physiochemical characteristics for biomedical applications. In the present research, we used Rutin (Ru) extract, a biocompatible flavonoid, as the reducing agent and nonsurfactant template for the green synthesis of Ag-decorated MSNs. Transmission electron microscopy (TEM), zeta-potential, x-ray powder diffraction (XRD), fourier transform infrared (FTIR) spectroscopy analysis, scanning electron microscopy (SEM), brunauer–emmett–teller (BET) analysis, and energy-dispersive system (EDS) spectroscopy were used to evaluate the Ag-decorated MSNs physical characteristics. The antimicrobial properties were evaluated against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and a...
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Ocean thermal energy conversion (OTEC) is a solution for environmental and climate change issues in the tropics. The OTEC potential in Malaysia using ocean conditions and bathymetry data has been previously studied and demonstrated.... more
Ocean thermal energy conversion (OTEC) is a solution for environmental and climate change issues in the tropics. The OTEC potential in Malaysia using ocean conditions and bathymetry data has been previously studied and demonstrated. Following this, it is vital to perform a basic performance analysis of a 10 MW Rankine Cycle OTEC plant using the Malaysian ocean conditions. In this paper, the results of heat and mass balance will be reported for a 10 MW Rankine cycle OTEC plant which uses heat exchangers of plate-type and anhydrous ammonia as its working fluid. The value of a minimum objective function (γ) is derived by total heat surface area (AT) divided by the net power (PN). γ decreases when the inlet temperature difference (inlet temperature of warm seawater (TWSWI)—inlet temperature of cold seawater (TCSWI)) increases. PN is clarified to be approximately 70–80% of the PG (gross power) using Malaysian ocean conditions.
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In recent years, high value lipid extraction in order to convert into a biodiesel product was potentially investigated among various microalgae strains. As a proof, in this research study, a significant amount of triacyl glyceride from... more
In recent years, high value lipid extraction in order to convert into a biodiesel product was potentially investigated among various microalgae strains. As a proof, in this research study, a significant amount of triacyl glyceride from Chlorella sorokiniana was obtained. Moreover, effective parameters such as pH, temperature and light intensity were assessed thoroughly. The petroleum fuels are limited and depleting due to increase in consumption and cause environmental problems. Microalgae are discussed as a source for the production of befouls. Therefore, biodiesel is the only substitute fuel attainable as it is technically feasible, economically competitive, environmentally acceptable and easily available to fulfill the increasing demands for energy. This research was conducted to extract of lipid from Chlorella sorokiniana and characterization of fatty acid composition by Gas chromatography requirements. Transesterification process was carried out to produce methyl esters. After ...
Magnetic Resonance Imaging (MRI) systems need a material compatible with the imaging technique with lesser attenuation and provide accurate images without distortion. Carbon fibers are the best-suited materials for x-ray applications... more
Magnetic Resonance Imaging (MRI) systems need a material compatible with the imaging technique with lesser attenuation and provide accurate images without distortion. Carbon fibers are the best-suited materials for x-ray applications because of their radiolucent properties and reduced attenuation characteristics. However, carbon fiber produces images with distortion in the MRI system by absorbing electromagnetic energy because of its conductive nature. In the present study, five different fiber-reinforced radiolucent composite plates are analyzed to predict their suitability for a radio frequency coil and the effect of a primary magnetic field of 1.5 T and 3.0 T on mechanical responses. Simulation models are built to explore the impact of electromagnetic waves and birdcage coil configurations on composite material and quantify the temperature changes caused due to energy absorption. A multiphysics coupling simulation is being used to understand the effect of stacking sequence, ply o...
Strict environmental concerns, depleting natural recourses, and rising demand for building construction materials have promoted scientific research toward alternative building materials. This research supports the idea of sustainability... more
Strict environmental concerns, depleting natural recourses, and rising demand for building construction materials have promoted scientific research toward alternative building materials. This research supports the idea of sustainability and a circular economy via the utilization of waste to produce value-added products. The research explored the potential of waste plastics and silica sand for developing thermoplastic composite as floor tiles. The samples were characterized by water absorption, compressive strength, flexural strength, and sliding wear. The morphological analysis of the sand-plastic interfaces was covered under the umbrella of this study. The maximum compressive and flexural strength were found to be 46.20 N/mm2 and 6.24 N/mm2, respectively, with the minimum water absorption and sliding wear rate of 0.039% and 0.143 × 10–8 kg/m, respectively. The study suggests the workability of the developed floor tiles in non-traffic areas of public places. Thus, the study provides...
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In this paper, the technical-economic framework for designing of water pumping system based on photovoltaic clean energy with water tank storage is presented to supply drinking water of customers for remote areas. The objective function... more
In this paper, the technical-economic framework for designing of water pumping system based on photovoltaic clean energy with water tank storage is presented to supply drinking water of customers for remote areas. The objective function is to minimize the net present cost (NPC) (as economic index) including initial investment costs, maintenance, and replacement costs, and reliability constraint is defined as customer’s water not supplied probability (CWNSP) as technical index. A meta-heuristic intelligent water drops algorithm (IWDA) is proposed to optimize the solar water pumping system considering NPC and CWNSP with high accuracy and speed of optimization in achieving the global solution. The simulation results show that the proposed method is capable of responding to customer’s water demand by optimally sizing components and water storage tank based on IWDA which is inspired based on flowing the water drops in rivers by achieving the lowest cost with optimal reliability. The NPC of the system with CWNSP equal to 3.17 % is obtained 0.24 M$ for 6-m-high water extraction. The results showed that with increasing the water extraction height, the NPC increased, and the reliability also weakened. Moreover, the superiority of the IWDA is confirmed compared with particle swarm optimization (PSO) in designing a water pumping system with the lowest NPC.