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Nor Azizah Parmin
Preferred name
Nor Azizah Parmin
Official Name
Nor Azizah, Parmin
Alternative Name
Parmin, N. A.
Parmin, Nor Azizah
Parmin, Nor A.
Main Affiliation
Scopus Author ID
57195835481
Researcher ID
S-6303-2019
Now showing
1 - 10 of 31
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PublicationProduction and characterization of graphene from carbonaceous rice straw by cost-effect extraction( 2021-05-01)
; ; ; ;Halim N.H. ; ;Muhammad Nur Afnan UdaAnbu P.This paper describes the synthesis of graphene-based activated carbon from carbonaceous rice straw fly ash in an electrical furnace and the subsequent potassium hydroxide extraction. The produced graphene has a proper morphological structure; flakes and a rough surface can be observed. The average size of the graphene was defined as up to 2000 nm and clarification was provided by high-resolution microscopes (FESEM and FETEM). Crystallinity was confirmed by surface area electron diffraction. The chemical bonding from the graphene was clearly observed, with –C=C– and O–H stretching at peaks of 1644 cm−1 and 3435 cm−1, respectively. Impurities in the graphene were found using X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy. The measured size, according to zeta-potential analysis, was 8722.2 ± 25 nm, and the average polydispersity index was 0.576. The stability of the mass reduction was analyzed by a thermogravimetric at 100 °C, with a final reduction of ~ 11%. -
PublicationVoltammetric DNA Biosensor for Human Papillomavirus (HPV) Strain 18 Detection( 2020-07-09)
;Mhd Akhir M.A. ; ; ; ;Rejali Z. ;Afzan A. ; ;Muhammad Nur Afnan UdaThis research was developed to focus on the study of the voltammetric DNA biosensor for the detection of HPV strain 18. In this research, electrical DNA biosensor was expected to detect HPV strain 18 more efficiently by using electrical characterization. In this project, device inspection was conducted to make sure the functional of the gold interdigitated electrode (IDE) by using Scanning Electron Microscope (SEM). 3-Aminopropyl Triethoxysilane (APTES) solution was used for the process of surface modification to form the amine group on the surface of the device to facilitate the attachment of the DNA probe. In this project, synthetic DNA sample and DNA from the saliva of several Biosystems Engineering students were used as the target DNA. The current-voltage (I-V) electrical characterization was conducted to detect the presence of HPV strain 18 in both DNA samples. As the results, perfect alignment between the electrodes on the IDE was detected under SEM. Surface modification of the biosensor successfully conducted which is the covalent bond between APTES and DNA probe increase the electrical. Synthetic DNA shows the presence of HPV strain 18 while there was no HPV strain 18 detected in the DNA from saliva samples. -
PublicationAnalysis on silica and graphene nanomaterials obtained from rice straw for antimicrobial potential( 2024-06)
; ;N. H. A Jalil ; ; ; ; ; ; ; ;Nur Hulwani Ibrahim ; ;Nadiya Akmal BaharumThis study focuses on the encapsulation of silica and graphene nanoparticles and their potential applications. The encapsulation enhances the properties and effectiveness of these nanoparticles, with silica providing stability and graphene contributing to high surface area and electrical conductivity. Characterization of silica-graphene nanoparticles was conducted using various techniques including High Power Microscope (HPM), Scanning Electron Microscope (SEM), Energy-dispersive X-ray spectroscopy (EDS), and 3D Nano Profiler. The antimicrobial activity of silica, graphene, and silica-graphene nanoparticles was evaluated using a disc diffusion assay against E. coli and B. subtilis at varying concentrations. Results showed significant antimicrobial activity, with the inhibition zone being directly proportional to the concentration. Silica-graphene nanoparticles demonstrated higher efficacy against E. coli compared to B. subtilis, attributed to differences in cell wall structure. Statistical analysis using ANOVA confirmed significant differences in antimicrobial activity among the tested components. -
PublicationFacile electrical DNA genosensor for human papillomavirus (HPV 58) for early detection of cervical cancer( 2023-07)
;F. Nadhirah Jaapar ; ; ; ; ; ;Sh. Nadzirah ; ; ;Wei Chern Ang ;Iffah Izzati Zakaria ;Zulida Rejali ;Amilia Afzan ;Azrul Azlan Hamzah ;Chang Fu DeeF. Syakirah HalimFor decades, a Pap smear test has been applied as a conventional method in detecting Human Papillomavirus caused cervical cancer. False-positive results were also recorded while using it as conventional method. Current biosensor such as Hybrid (II) Capture resulted in higher time consumption and cost. s Meanwhile, in this study we provided facile, mini, rapid, highly sensitive, eco-friendly, and cost-effective sensing system focusing on HPV strain 58 (HPV58) in a nano-size lab-on-chip technology genosensor. 30-mer of virus ssDNA designed and analyzed as a probe via bioinformatics tools such as GenBank, Basic Local Alignment Searching Tools (BLAST) and ClustalW. Nanotechnology-developed colloidal Gold-nanoparticles (AuNPs) are used in the biosensor fabrication to produce high stability and electron efficient transmission during electrical measurement. AuNPs-APTES modified on active sites of IDEs, followed by immobilization of specific probe ssDNA for HPV 58. Hydrogen binding during hybridization with its target produce electrical signals measured by KEITHLEY 2450 (Source Meter). The genosensor validated with different types of targets such as complimentary, non-complementary and single mismatch oligonucleotides. The serial dilution of target concentration has been experimented triplicate (n=3) range from 1fM to 10μM. The slope of calibration curve resulted 2.389E-0 AM-1 with regression coefficient (R2) = 0.97535. -
PublicationFacile Electrical DNA Genosensor for Human Papillomavirus (HPV 58) for Early Detection of Cervical Cancer( 2023-07-01)
;Jaapar F.N. ; ;Halim N.H.A. ; ; ; ;Nadzirah S. ; ; ;Ang W.C. ;Zakaria I.I. ;Rejali Z. ;Afzan A. ;Hamzah A.A. ;Dee C.F.Halim F.S.For decades, a Pap smear test has been applied as a conventional method in detecting Human Papillomavirus caused cervical cancer. False-positive results were also recorded while using it as conventional method. Current biosensor such as Hybrid (II) Capture resulted in higher time consumption and cost. s Meanwhile, in this study we provided facile, mini, rapid, highly sensitive, eco-friendly, and cost-effective sensing system focusing on HPV strain 58 (HPV58) in a nano-size lab-on-chip technology genosensor. 30-mer of virus ssDNA designed and analyzed as a probe via bioinformatics tools such as GenBank, Basic Local Alignment Searching Tools (BLAST) and ClustalW. Nanotechnology-developed colloidal Gold-nanoparticles (AuNPs) are used in the biosensor fabrication to produce high stability and electron efficient transmission during electrical measurement. AuNPs-APTES modified on active sites of IDEs, followed by immobilization of specific probe ssDNA for HPV 58. Hydrogen binding during hybridization with its target produce electrical signals measured by KEITHLEY 2450 (Source Meter). The genosensor validated with different types of targets such as complimentary, non-complementary and single mismatch oligonucleotides. The serial dilution of target concentration has been experimented triplicate (n=3) range from 1fM to 10µM. The slope of calibration curve resulted 2.389E-0 AM-1 with regression coefficient (R2) = 0.97535. -
PublicationDesign 5.0 µm Gap Aluminium Interdigitated Electrode for Sensitive pH Detection( 2020-07-09)
;Muhammad Nur Afnan Uda ; ; ; ; ;Bakar A.H.A. ;Anuar A. ;Bakar M.A.A.Sulaiman M.K.The aim of the research study to design high sensitive biosensor for medical applications. IDE pattern was designed using AutoCAD software with 5 µm ginger gap. The fabrication process was done using a conventional photolithography process and standard CMOS process. The fabricated electrode was physically characterized using a low power microscope (LPM) and a high power microscope (HPM). The electrically validated through I-V measurements and chemically tested with different pH buffer solutions. Al IDE was well fabricated with 0.1 µm tolerance between the design mask and fabricated IDEs. Electrical measurements confirmed that IDE was well fabricated without any shortage and results of similar IDE samples were confirmed that the repeatability of the device. The extremely small current variations in nano ampere range were quantitatively detected using an extra small volume of 2 µl for different pH buffer solutions. It is confirmed that IDEs are sensitive in both alkali and hydroxyl ions medium.6 10 -
PublicationEvaluation and Optimization of Genomic DNA Extraction from Food Sample for Microfluidic Purpose( 2020-03-18)
;Muhammad Nur Afnan Uda ; ; ; ;Shaharuddin S.N.A.Contamination of various food samples became one of the critical issues in food pathogen infection. Food pathogen can be detected by using digital polymerase chain reaction (PCR) and sequencing. These methods were reliable but consuming and take a longer time for detection. The present work describes the innovation to develop a technology to extract double-stranded deoxyribonucleic acid (dsDNA) from food samples and then denatured dsDNA into and single-strand DNA (ssDNA) for further use on the chip using microfluidic device. Microfluidic device is a lab-on-chip device that consist of microfluidic channels that provide paths for biomolecules to flow to individual point of care. DNA extraction is the process by which DNA is separated from proteins, membranes, and other cellular material contained in the cell from which it is recovered. Lysis solution is used in the process of extraction the DNA to break up the cells containing DNA from protein and other cellular materials. This extraction firstly be done in the most labour-intensive in obtaining the DNA biomolecules. Extraction methods may require an overnight incubation, may be a protocol that can be completed in minutes or a couple of hours by using a commercial kit. The disadvantages of the laboratory and commercial kit is due to time-consuming, poor cost-effectiveness, the need to use big laboratory and a complicated process which need an expertise to conduct the experiment and interpret the data. This research is proposed to design and fabricate a microfluidic device that has DNA extraction capabilities. In this research DNA extraction using a commercial kit will be used as a comparison for the quality of the result. The microfluidic device can be used in health care delivery system and will help the doctors in diagnostic process to identify disease of a patient rapidly. Other than that, the output extracted from microfluidic device will be used for DNA probe target interaction for diagnostic kit. The major advantage of microfluidic device is that it consumes less time compared to the conventional chemical methods.1 21 -
PublicationNew Development Quantification Methods for Salt Iodine and Urinary Iodine Using Microfluidics Based Nanotechnology( 2020-03-18)
;Nur Hulwani Ibrahim ; ; ; ;Muhammad Nur Afnan UdaIn 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., 2010). Baseline and periodical sampling of children and pregnant woman urine and imported salt commodities for the consumption of the population is mandatory for iodine measurement. Thus, development of quantitative methods of measurement of salt and food iodine is crucial for implementation of the USI program nationwide. In this study, interdigitated electrode (IDE) biosensor, a rapid, sensitive and selective method has been developed to determine the iodine content in both urine and salt. This method includes functionalization and silanization step using 3-aminopropyl triethoxysilane (APTES). The I-V characterization of IDE biosensor was performed using (Keithley 2450), Kickstart software and Probestation. It measures the amount of current flow through IDE which is directly proportional to the concentration of iodine in both urine and salt. Hence, IDE biosensor is proven to be a rapid, selective, sensitive method and can be developed as a new nanotechnology for the elimination of Iodine Deficiency Disorders (IDD) among children and pregnant woman.44 1 -
PublicationMorphological Analysis of Fabricated 5.0 μM Interdigitated Electrode (IDE)( 2021-12-14)
; ; ; ;Muhammad Nur Afnan Uda ; ;Halim N.H. ;Hashim M.K.R.Anbu P.The aim of this research is to study the morphological analysis of fabricated Interdigitated Electrode (IDE). This device electrode was physically characterized using 3D nano profiler, scanning electrode microscope (SEM), Energy-dispersive X-ray spectroscopy (EDX) and Atomic Force Microscope (AFM). Based on this analysis, IDE pattern was analyzed thoroughly based on the IDE pattern specifications with 5 μM finger gap and this research significantly will stand as a platform quantify the biomolecules in further analysis.22 2 -
PublicationDesigning DNA probe from human Papillomavirus (HPV) 58 in E6 region as biosensing element for development of biosensor( 2024-03-21)
;Jaapar N.F. ; ;Halim N.H.A. ; ; ; ;Nadzirah S. ; ; ;Ang W.C. ;Zakaria I.I. ;Rejali Z. ;Afzan A. ;Hamzah A.A. ;Dee C.F.Halim F.S.Globally, second leading cause of death for women is a Cervical Cancer. CC is caused by infection of Human Papillomavirus (HPV). HPV strains 16 (50.8%), 18 (17.6%), and 58 (2.6%) became the most leading strains of infection in Malaysia. Recently, a study showed that HPV 58 was rare worldwide but famous in Asia countries including Malaysia. However, detection the significance of HPV-58 in women has not been studied extensively because of rare case compared to HPV 16 and 18. HPV-58 is commonly found in East Asia, but infrequently worldwide, due to changes in the environment of viruses and humans. Detailed biological knowledge is crucial for the development of effective countermeasures, diagnostic tests, vaccines and antiviral drugs against the HPV. The oligonucleotide sequences of HPV 58 in E6 region have been analysed between 24-35 mer in order to maintain the specificity and selectivity. The percentage of similarities between the coding sequences has developed with 66.7% of GC content. The DNA probe of HPV 58 was 5'GGG CGC TGT GCA GTG TGT TGG AGA CCC CGA3' with 30 mer of oligonucleotides. The important of E6 region for developing the coding sequence as it involved in the DNA reproduction, transcription, translation regulation and transformation of HPV genome. Phylogenetic trees were then constructed by Neighbour-Joining and the Kimura 2-parameters methods, followed by an analysis of selection pressures acting on the E6/E7 genes by ebi ac uk tools.20 2