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Fulltext Indoor Air Quality (IAQ) monitoring in academic management centre

Zakaria, S., Leman, A.M., Feriyanto, D., Hariri, A., Nazri, A.A.

Journal of Occupational Safety and Health, 2016;13(1):33-40.
MyJurnal

Concerns toward Indoor Air Quality (IAQ) in office building tend to risen since most people spend their working hours
indoors compare to outdoors. Exposure to indoor pollutants is a considerable problem. Therefore, there is a need to monitor IAQ in
order to deter further air quality deterioration in the workplace. The objective of this study is to determine the level of IAQ parameter
in selected academic office. The important IAQ parameters considered in this study were the air temperature, air velocity, relative
humidity, CO2, CO, TVOC, formaldehyde and respirable particulate matter. Measurements were conducted using commercial IAQ
instruments. From the study it was found that the levels of TVOC and respirable particulate matter were higher than the recommended
limit during photocopying activities. The formaldehyde, CO2 and CO level were observed to be acceptable for an office based on
Industry code of practice on indoor air quality (ICOP-IAQ 2010). Results shows that the temperature and air velocity are located at
acceptable value of 22-25 ºC and 0.1-0.1 m/s. Findings also show high relative humidity that exceeded the requirement level of 40%-
70%. Detail investigations are needed in order to provide certain guidance in improvement of IAQ conditions in office environment.
Fulltext The effect of oral health education seminar on the oral health knowledge, practice and perception of role of the preschool teachers

Mohd Nor, N.A., Zakaria, S., Amminudin, N.H., Malik, N.A., Mohd Khairi, A.M.

Ann Dent, 2013;20(2):4-8.
MyJurnal

Background: In Malaysia, preschool teachers have long been utilised as oral health educators. However their level of oral health knowledge and effectiveness of the training they received are seldom investigated. This study aims to evaluate the of oral health education seminar (OHE) held for public preschool teachers (KEMAS) in terms of the improvement of their knowledge, practices and attitudes.
Methods: This was a one arm interventional study (before and after survey following OHE seminar intervention). All KEMAS preschool teachers (n=107) in Hulu Terengganu were invited to attend OHE seminar which consisted of 1 hour lecture and 40 minutes OHE demonstration. Pretest questionnaire was collected before the seminar started and post-test questionnaire was collected two weeks later. A self-administered questionnaire used in this study was adapted from “preschool teachers’ knowledge, practices and attitudes towards oral health”, National Oral Health Survey of Preschool Children, 2005. Data were analysed using descriptive and McNemar test, SPSS version 15.0.
Results: Of 107 subjects, only 61 teachers responded yielding to 57% response rate. All subjects were female with mean age of 46 years (SD: 6.03). Overall, there was an improvement of teachers’ oral health knowledge, practices and attitudes after the seminar. Several items seem to have be improved significantly after the seminar, for example knowledge item on factors causing periodontal disease (p=0.03). In terms of practice, all teachers reported they brushed teeth at least twice daily using fluoridated toothpaste and use of dental floss was increased significantly after the seminar (p<0.001). Majority of teachers have positive perceptions on their roles in oral health education.
Conclusion: Oral health education seminar appeared to be effective at influencing certain aspects of teachers’ oral health knowledge, practices and attitudes.
Keywords: attitudes, knowledge, oral health promotion, practice, preschool teachers
Enhancing mitogenomic phylogeny and resolving the relationships of extinct megafaunal placental mammals

Phillips MJ, Shazwani Zakaria S

Mol Phylogenet Evol, 2021 05;158:107082.
PMID: 33482383 DOI: 10.1016/j.ympev.2021.107082

Mitochondrial genomes provided the first widely used sequences that were sufficiently informative to resolve relationships among animals across a wide taxonomic domain, from within species to between phyla. However, mitogenome studies supported several anomalous relationships and fell partly out of favour as sequencing multiple, independent nuclear loci proved to be highly effective. A tendency to blame mitochondrial DNA (mtDNA) has overshadowed efforts to understand and ameliorate underlying model misspecification. Here we find that influential assessments of the infidelity of mitogenome phylogenies have often been overstated, but nevertheless, substitution saturation and compositional non-stationarity substantially mislead reconstruction. We show that RY coding the mtDNA, excluding protein-coding 3rd codon sites, partitioning models based on amino acid hydrophobicity and enhanced taxon sampling improve the accuracy of mitogenomic phylogeny reconstruction for placental mammals, almost to the level of multi-gene nuclear datasets. Indeed, combined analysis of mtDNA with 3-fold longer nuclear sequence data either maintained or improved upon the nuclear support for all generally accepted clades, even those that mtDNA alone did not favour, thus indicating "hidden support". Confident mtDNA phylogeny reconstruction is especially important for understanding the evolutionary dynamics of mitochondria themselves, and for merging extinct taxa into the tree of life, with ancient DNA often only accessible as mtDNA. Our ancient mtDNA analyses lend confidence to the relationships of three extinct megafaunal taxa: glyptodonts are nested within armadillos, the South American ungulate, Macrauchenia is sister to horses and rhinoceroses, and sabre-toothed and scimitar cats are the monophyletic sister-group of modern cats.
Enhanced mechanical properties of hydrothermal carbamated cellulose nanocomposite film reinforced with graphene oxide

Gan S, Zakaria S, Syed Jaafar SN

Carbohydr Polym, 2017 Sep 15;172:284-293.
PMID: 28606537 DOI: 10.1016/j.carbpol.2017.05.056

Cellulose carbamate (CC) was synthesized via hydrothermal process and mixed with graphene oxide (GO) to form a homogeneous cellulose matrix nanocomposite films. The properties of CC/GO nanocomposite films fabricated using simple solution-mixing method with different GO loadings were studied. Transmission electron microscope analysis showed the exfoliation of self-synthesized GO nanosheets within the CC matrix. X-ray diffraction results confirmed the crystalline structure of CC/GO films as the CC/GO mass ratio increased from 100/0 to 100/4. The mechanical properties of CC/GO film were significantly improved as compared to neat CC film. From thermogravimetric analysis result, the introduction of GO enhanced the thermal stability and carbon yields. The 3D homogeneous porous structures of the CC/GO films were observed under Field emission scanning electron microscope. These improvements in nanocomposite film properties could be confirmed by Fourier transform infrared spectroscopy due to the strong and good interactions between CC and GO.
Fulltext Exploring the impact of a transdiagnostic cognitive behavioural therapy-based intervention on a group of Malaysian adolescents with problematic drug use and emotional problems

Zakaria S, Sasagawa S, Essau CA

Addict Behav Rep, 2021 Dec;14:100381.
PMID: 34938839 DOI: 10.1016/j.abrep.2021.100381

Introduction: Adolescents with problematic substance use frequently have anxiety and depression and tend to have "unhealthy" lifestyle such as having poor dietary patterns and physical inactivity. The overall aim of the present study was to explore the impact of a Transdiagnostic Cognitive Behavioral Therapy-based Intervention ("Super Skills for Life" - adolescent version; SSL-A) on emotional problems among adolescents with problematic substance use and to identify demographic factors which influence the intervention outcomes.
Method: A total of 108 adolescents (M = 16.30 years, SD = 1.6) with problematic substance use who showed high levels of anxiety and depression participated in this study. They completed a set of questionnaires to measure substance use, mental health problems, cognitive emotion regulation strategies, loneliness, and lifestyle and habits at pre- and post-intervention.
Results: The adolescents reported less emotional symptoms and more prosocial behavior after the intervention. These adolescents were also consumed less substance and used less maladaptive emotion regulation strategies after participating in SSL-A. Females compared to males showed more treatment gains (i.e., reduction in loneliness and improvement in psychological health and self-esteem) after the intervention.
Conclusion: This study provides empirical evidence for the utility of the SSL-A in reducing emotional problems and substance use among adolescents with problematic substance use.
Fulltext Green synthesis and characterization of UKMRC-8 rice husk-derived mesoporous silica nanoparticle for agricultural application

Dorairaj D, Govender N, Zakaria S, Wickneswari R

Sci Rep, 2022 Nov 23;12(1):20162.
PMID: 36424408 DOI: 10.1038/s41598-022-24484-z

Agriculture plays a crucial role in safeguarding food security, more so as the world population increases gradually. A productive agricultural system is supported by seed, soil, fertiliser and good management practices. Food productivity directly correlates to the generation of solid wastes and utilization of agrochemicals, both of which negatively impact the environment. The rice and paddy industry significantly adds to the growing menace of waste management. In low and middle-income countries, rice husk (RH) is an underutilized agro-waste discarded in landfills or burned in-situ. RH holds enormous potential in the development of value-added nanomaterials for agricultural applications. In this study, a simple and inexpensive sol-gel method is described to extract mesoporous silica nanoparticles (MSNs) from UKMRC8 RH using the bottom-up approach. RHs treated with hydrochloric acid were calcinated to obtain rice husk ash (RHA) with high silica purity (> 98% wt), as determined by the X-ray fluorescence analysis (XRF). Calcination at 650 °C for four hours in a box furnace yielded RHA that was devoid of metal impurities and organic matter. The X-ray diffraction pattern showed a broad peak at 2θ≈20-22 °C and was free from any other sharp peaks, indicating the amorphous property of the RHA. Scanning electron micrographs (SEM) showed clusters of spherically shaped uniform aggregates of silica nanoparticles (NPs) while transmission electron microscopy analysis indicated an average particle size of
Health-related quality of life (HRQOL) among pediatric leukemia patients in Malaysia

Hamidah A, Wong CY, Tamil AM, Zarina LA, Zulkifli ZS, Jamal R

Pediatr Blood Cancer, 2011 Jul 15;57(1):105-9.
PMID: 21465639 DOI: 10.1002/pbc.23125

Health-Related Quality of Life (HRQOL) in pediatric leukemia patients in Malaysia has not been studied before. This was mainly due to a lack of databases on patients in the past. Many patients abandoned treatment or were lost to follow up. With more children now fully compliant and completing treatment nowadays, with higher cure rate, HRQOL has become important for our patients. The purpose of the current study was to determine the HRQOL scores in children with acute leukemia and to compare the scores for those on maintenance chemotherapy with those off-treatment as well as to determine factors which might affect HRQOL.
Prevalence and parental perceptions of complementary and alternative medicine use by children with cancer in a multi-ethnic Southeast Asian population

Hamidah A, Rustam ZA, Tamil AM, Zarina LA, Zulkifli ZS, Jamal R

Pediatr Blood Cancer, 2009 Jan;52(1):70-4.
PMID: 18937312 DOI: 10.1002/pbc.21798

The purpose of the current study was to determine the prevalence of use of complementary and alternative medicine (CAM) by children with cancer and to compare the characteristics of CAM users and CAM nonusers.
Synthesis of kenaf cellulose carbamate and its smart electric stimuli-response

Gan S, Piao SH, Choi HJ, Zakaria S, Chia CH

Carbohydr Polym, 2016 Feb 10;137:693-700.
PMID: 26686181 DOI: 10.1016/j.carbpol.2015.11.035

Cellulose carbamate (CC) was produced from kenaf core pulp (KCP) via a microwave reactor-assisted method. The formation of CC was confirmed by Fourier transform infrared spectroscopy and nitrogen content analysis. The degree of substitution, zeta potential and size distribution of CC were also determined. The CC was characterized with scanning electron microscopy, X-ray diffraction and thermogravimetry analysis. The CC particles were then dispersed in silicone oil to prepare CC-based anhydrous electric stimuli-responsive electrorheological (ER) fluids. Rhelogical measurement was carried out using rotational rheometer with a high voltage generator in both steady and oscillatory shear modes to examine the effect of electric field strength on the ER characteristics. The results showed that the increase in electric field strength has enhanced the ER properties of CC-based ER fluid due to the chain formation induced by electric polarization among the particles.
Effect of hydrothermal pretreatment on solubility and formation of kenaf cellulose membrane and hydrogel

Gan S, Zakaria S, Chia CH, Padzil FN, Ng P

Carbohydr Polym, 2015 Jan 22;115:62-8.
PMID: 25439869 DOI: 10.1016/j.carbpol.2014.08.093

The hydrothermal pretreatment on kenaf core pulp (KCP) was carried out using an autoclave heated in a oil bath at 140°C for 0.5/1/3/5h. The hydrothermal pretreated kenaf (HPK) was dissolved in a LiOH/urea aqueous solution and subsequently used to produce cellulose membrane and hydrogel. The effects of hydrothermal pretreatment time on solubility, viscosity, crystallinity and morphology of the cellulose membrane and hydrogel were investigated. The hydrothermal pretreatment leads to higher cellulose solubility and higher viscosity of the cellulose solution. The formation of cellulose II and crystallinity index of the cellulose membrane and hydrogel were examined by X-ray diffraction (XRD). The pore size of the cellulose membrane and hydrogel displayed an upward trend with respect to the hydrothermal pretreatment period observed under a field emission scanning electron microscope (FESEM). This finding provides an efficient procedure to improve the solubility, viscosity and properties of regenerated cellulose products.
Synthesis of kenaf cellulose carbamate using microwave irradiation for preparation of cellulose membrane

Gan S, Zakaria S, Chia CH, Kaco H, Padzil FN

Carbohydr Polym, 2014 Jun 15;106:160-5.
PMID: 24721064 DOI: 10.1016/j.carbpol.2014.01.076

Cellulose carbamate (CCs) was produced from kenaf core pulp (KCP) using microwave reactor-assisted method. The effects of urea concentration and reaction time on the formation of nitrogen content in CCs were investigated. The CCs' solubility in LiOH/urea system was determined and its membranes were characterized. As the urea content and reaction time increased, the nitrogen content form in CCs increased which enhanced the CCs' solubility. The formation of CCs was confirmed by Fourier transform infrared spectroscopy (FT-IR) and nitrogen content analysis. The CCs' morphology was examined using Scanning electron microscopy (SEM). The cellulose II and crystallinity index of the membranes were confirmed by X-ray diffraction (XRD). The pore size of the membrane displayed upward trend with respect to the urea content observed under Field emission scanning electron microscope (FESEM). This investigation provides a simple and efficient procedure of CCs determination which is useful in producing environmental friendly regenerated CCs.
Fulltext Direct production of biodiesel from high-acid value Jatropha oil with solid acid catalyst derived from lignin

Pua FL, Fang Z, Zakaria S, Guo F, Chia CH

Biotechnol Biofuels, 2011;4:56.
PMID: 22145867 DOI: 10.1186/1754-6834-4-56

Solid acid catalyst was prepared from Kraft lignin by chemical activation with phosphoric acid, pyrolysis and sulfuric acid. This catalyst had high acid density as characterized by scanning electron microscope (SEM), energy-dispersive x-ray spectrometry (EDX) and Brunauer, Emmett, and Teller (BET) method analyses. It was further used to catalyze the esterification of oleic acid and one-step conversion of non-pretreated Jatropha oil to biodiesel. The effects of catalyst loading, reaction temperature and oil-to-methanol molar ratio, on the catalytic activity of the esterification were investigated.
Thermodynamic aspects of sorption of Fe2+ onto unbleached Kraft fibres

Chia CH, Duong TD, Nguyen KL, Zakaria S

J Colloid Interface Sci, 2007 Mar 1;307(1):29-33.
PMID: 17174968

The sorption of Fe(2+) onto unbleached kraft fibre was investigated at different conditions such as pH, temperature, and concentrations. The sorption, which increased with concentration and temperature, followed the Langmuir isotherm. Thermodynamically, the process was spontaneous and endothermic. It was found that the precipitation of Fe(2+) was highly dependent on pH and reached 100% when pH exceeded approximately 8.
Cationic and anionic modifications of oil palm empty fruit bunch fibers for the removal of dyes from aqueous solutions

Sajab MS, Chia CH, Zakaria S, Khiew PS

Bioresour Technol, 2013 Jan;128:571-7.
PMID: 23211482 DOI: 10.1016/j.biortech.2012.11.010

Oil palm empty fruit bunch (EFB) fibers were employed to remove dyes from aqueous solutions via adsorption approaches. The EFB fibers were modified using citric acid (CA) and polyethylenimine (PEI) to produce anionic and cationic adsorbents, respectively. The CA modified EFB fibers (CA-EFB) and PEI-modified EFB fibers (PEI-EFB) were used to study the efficiency in removing cationic methylene blue (MB) and anionic phenol red (PR) from aqueous solutions, respectively, at different pHs, temperatures and initial dye concentrations. The adsorption data for MB on the CA-EFB fitted the Langmuir isotherm, while the adsorption of PR on the PEI-EFB fitted the Freundlich isotherm, suggesting a monolayer and heterogeneous adsorption behavior of the adsorption processes, respectively. Both modified fibers can be regenerated up to seven adsorption/desorption cycles while still providing as least 70% of the initial adsorption capacity.
Parental Knowledge on Nephrotic Syndrome and Disease Relapse in children

Diong SC, Syed Zakaria SZ, Rasat R, Wan Ismail WJ

Med J Malaysia, 2019 08;74(4):288-295.
PMID: 31424035

INTRODUCTION: Parental knowledge on nephrotic syndrome and disease relapse is important for early recognition and treatment of relapse to prevent the complications. Parental knowledge on nephrotic syndrome was reported to be inadequate from published studies. To date, there is no study on parental knowledge on childhood nephrotic syndrome in Malaysia. This study is thus aimed at to determine the level of knowledge on NS and disease relapse among parents of children with nephrotic syndrome and determine factors that influence knowledge on nephrotic syndrome and disease relapse.
STUDY DESIGN AND METHODS: This was a cross-sectional study conducted in Paediatric Nephrology Clinic, Hospital Selayang from November 2016 to November 2017. Seventy-eight parents were recruited based on universal sampling. Selfadministered questionnaire in Bahasa Malaysia and English was designed through focus group discussion with five subject matter experts and validated through content validity. Data was analysed using IBM SPSS Statistics 23.0.
RESULTS: Majority of parents or guardians (91%) were able to answer more than 50% of the questions correctly. Of these, 56% were able to answer more than 75% of the questions correctly. A 'cut-off' of 75% was defined as good knowledge. Parents of children with frequent relapses had higher parental knowledge and this was statistically significant (p=0.025).
CONCLUSION: Parental knowledge on nephrotic syndrome and disease relapse was still inadequate as only 56% parents had good knowledge. The main areas of deficit in parental knowledge were related to medications, infections, home urine dipstick monitoring, and recognition of warning signs during relapse.
Diagnostic performance of prostate health index (PHI) in predicting prostate cancer on prostate biopsy

Othman H, Abu Yamin AH, Md Isa N, Bahadzor B, Syed Zakaria SZ

Malays J Pathol, 2020 Aug;42(2):209-214.
PMID: 32860373

INTRODUCTION: Prostate health index (PHI) has been shown to have better diagnostic accuracy in predicting prostate cancer (PCa) in men with total prostate-specific antigen (PSA) levels between 4-10ng/ml. However, little is known of its value in men with elevated PSA beyond this range. This study aimed to evaluate the diagnostic performance of PHI in Malaysian men with elevated PSA values ≤ 20ng/ml.
MATERIALS AND METHODS: From March 2015 to August 2016, all men consecutively undergoing transrectal ultrasound (TRUS)-guided prostate biopsy with total PSA values ≤ 20ng/ ml were recruited. Blood samples were taken immediately before undergoing prostate biopsy. The performance of total PSA, %fPSA, %p2PSA and PHI in determining the presence of PCa on prostate biopsy were compared.
RESULTS: PCa was diagnosed in 25 of 84 patients (29.7%). %p2PSA and PHI values were significantly higher (p<0.05) in patients with PCa than those without PCa. The areas under the receiver operating characteristic curves for total PSA, %fPSA, %p2PSA and PHI were 0.558, 0.560, 0.734 and 0.746, respectively. At 90% sensitivity, the specificity of PHI (42.4%) was five times better than total PSA (8.5%) and two times better than %fPSA (20.3%). By utilising PHI cut-off >22.52, 27 of 84 (32.1%) patients could have avoided undergoing biopsy.
CONCLUSION: Findings of our study support the potential clinical effectiveness of PHI in predicting PCa in a wider concentration range of total PSA up to 20ng/ml.
Fulltext Gram-negative infection as an unusual cause of endocarditis in a hemodialysis patient

Balakrishnan S, Aamar A, Rhee S, Zakaria S, Khaliq W

Med J Malaysia, 2016 Jun;71(3):152-3.
PMID: 27495894

Gram-negative endocarditis is rare and it has high mortality if there is a delay in diagnosis and treatment. Gram-negative organisms should be considered in the differential diagnosis of IE in hemodialysis patients. Central lineassociated bloodstream infections (CLABSIs) can be prevented by following sterile measures during catheter insertion and proper management of catheter site.
Superabsorbent hydrogel from oil palm empty fruit bunch cellulose and sodium carboxymethylcellulose

Salleh KM, Zakaria S, Sajab MS, Gan S, Kaco H

Int J Biol Macromol, 2019 Jun 15;131:50-59.
PMID: 30844455 DOI: 10.1016/j.ijbiomac.2019.03.028

A green regenerated superabsorbent hydrogel was fabricated with mixtures of dissolved oil palm empty fruit bunch (EFB) cellulose and sodium carboxymethylcellulose (NaCMC) in NaOH/urea system. The formation of hydrogel was aided with epichlorohydrin (ECH) as a crosslinker. The resultant regenerated hydrogel was able to swell >80,000% depending on the NaCMC concentrations. The hydrogel absorbed water rapidly upon exposure to water up to 48 h and gradually declined after 72 h. The crosslinked of covalent bond of COC between dissolved EFB cellulose (EFBC) with NaCMC was confirmed with Attenuated total reflectance Fourier transform infrared (ATR-FT-IR) spectroscopy. Crystallinity and thermal stability of the hydrogel samples were depended on the concentrations of NaCMC, crosslinking, and swelling process. The strength and stability of crosslinked network was studied by examining the gel fraction of hydrogel. This study explored the swelling ability and probable influenced factors towards physical and chemical properties of hydrogel.
Fulltext Different Preparation Method of Nanocellulose from Macaranga gigantea and Its Preliminary Study on Packaging Film Potential

Jasmani L, Jamaluddin NAN, Rusli R, Adnan S, Zakaria S

Polymers (Basel), 2022 Oct 28;14(21).
PMID: 36365585 DOI: 10.3390/polym14214591

Nanocellulose is a versatile cellulosic nanomaterial that can be used in many application areas. Applying different preparation strategies leads to different types of nanocellulose. In this study, nanocrystalline cellulose (NCC) and nanofibrillated cellulose (NFC) were prepared from lesser known wood species, viz., Macaranga gigantea, using sulfuric acid hydrolysis and enzymatic pretreatment with ultrafine grinding approaches, respectively. The respective nanocellulose was characterized by means of Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), atomic force microscopy (AFM). It was then converted into a thin film to assess its performance which includes tensile test, transparency, air permeance, water vapor transmission rate (WVTR), and water vapor permeability (WVP) properties. NCC and NFC produced from the raw material of Macaranga had average widths of 6.38 ± 3.92 nm and 13.17 ± 12.71 nm, respectively. Peaks in FTIR spectra showed the conversion of Macaranga wood to nanocellulose by the presence of cellulose fingerprint as well as absence of lignin and hemicellulose after alkaline treatment. The successful conversion was also supported by XRD analysis which displayed the increased crystallinity value from 54% to 70%. TGA decomposition pattern at 200-490 °C revealed the thermal stability of the samples. The thin film produced from nanocelluloses had WVTR values of 4.58 and 12.14 g/(day·m2) for NFC and NCC, respectively, comparable to those of films from polyester and oriented polypropylene. Nanocellulose-based thin film has the potential to be used as sustainable and biodegradable packaging.
Fulltext Recent advancement in 3-D printing: nanocomposites with added functionality

Clarissa WH, Chia CH, Zakaria S, Evyan YC

Prog Addit Manuf, 2022;7(2):325-350.
PMID: 38624631 DOI: 10.1007/s40964-021-00232-z

Three-Dimentional (3-D) printing is currently a popular printing technique that is used in many sectors. Potentially, this technology is expected to replace conventional manufacturing in the coming years. It is accelerating in gaining attention due to its design freedom where objects can be produced without imagination boundaries. The review presents a perspective on the application of 3-D printing application based on various fields. However, the ordinary 3-D printed products with a single type of raw often lack robustness leading to broken parts. Improving the mechanical property of a 3-D printed part is crucial for its applications in many fields. One of the promising solutions is to incorporate nanoparticles or fillers into the raw material. The review aims to provide information about the types of additive manufacturing. There are few types of raw materials can be used as foundation template in the printing, enhanced properties of the printed polymer nanocomposites with different types of nanoparticles as additives in the printing. The article reviews the advantages and disadvantages of different materials that are used as raw materials or base materials in 3-D printing. This can be a guideline for the readers to compare and analyse the raw materials prior to a decision on the type of material to be selected. The review prepares an overview for the researchers to choose the types of nanoparticles to be added in the printing of the products depending on the targeted application. With the added functionality of the 3-D polymer nanocomposites, it will help in widespread of the application of 3-D printing technology in various sector.

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