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SCOPUS publications SEPT 2021 C O M P I L AT I O N O F R E S E A R C H W O R K S PUBLISHED BY ACADEMICIANS FROM UNIKL MICET
clay nanocomposite und dressing
shid, Nor Adilah Norodin,
y for the extraction of l production: potential
ifli, Nor Afifah Khalil,
strength of spray-dried binary powder mixture
d Tahir, S.M.
TABLE OF CONTENTS
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Title (1)
A study of methylcellulose based polymer electrolyte impregnated with potassium : ion conducting carrier: Impedance, eec modeling, ftir, dielectric, and device characteristics
Journal
: Materials : Volume 14, Issue 17, 1 September 2021, Article number 4859
Document Type
: Article (Open Access)
Publisher
: MDPI
UniKL Author
: Ahmad S.F.M. Asnawi
Link to Full Text
: https://www.mdpi.com/1996-1944/14/17/4859
Link to Scopus Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85114046431&doi=10.3390%2fma14174859&partnerID=40&md5=d4e9f9a114a65 2b4dc109373bf47da01
Citation
Nofal, M. M., Hadi, J. M., Aziz, S. B., Brza, M. A., Asnawi, A. S. F. M., Dannoun, E. M. A., . . . Kadir, M. F. Z. (2021). A study of methylcellulose based polymer electrolyte : impregnated with potassium ion conducting carrier: Impedance, eec modeling, ftir, dielectric, and device characteristics. Materials, 14(17) doi:10.3390/ma14174859
Abstract
In this research, a biopolymer-based electrolyte system involving methylcellulose (MC) as a host polymeric material and potassium iodide (KI) salt as the ionic source was prepared by solution cast technique. The electrolyte with the highest conductivity was used for device application of electrochemical double-layer capacitor (EDLC) with high specific capacitance. The electrical, structural, and electrochemical characteristics of the electrolyte systems were investigated using various techniques. According to electrochemical impedance spectroscopy (EIS), the bulk resistance (Rb ) decreased from 3.3 × 105 to 8 × 102 Ω with the increase of salt concentration from 10 wt % to 40 wt % and the ionic conductivity was found to be 1.93 ×10−5 S/cm. The dielectric analysis further verified the conductivity trends. : Low-frequency regions showed high dielectric constant, ε′ and loss, ε” values. The polymer-salt complexation between (MC) and (KI) was shown through a Fourier transformed infrared spectroscopy (FTIR) studies. The analysis of transference number measurement (TNM) supported ions were predominantly responsible for the transport process in the MC-KI electrolyte. The highest conducting sample was observed to be electrochemically constant as the potential was swept linearly up to 1.8 V using linear sweep voltammetry (LSV). The cyclic voltammetry (CV) profile reveals the absence of a redox peak, indicating the presence of a charge doublelayer between the surface of activated carbon electrodes and electrolytes. The maximum specific capacitance.
Title (2)
Design of plasticized proton conducting Chitosan:Dextran based biopolymer blend : electrolytes for EDLC application: Structural, impedance and electrochemical studies
Journal
:
Document Type
: Article (Open Access)
Publisher
: Elsevier B.V.
UniKL Author
: Ahmad S.F.M. Asnawi
Link to Full Text
: https://www.sciencedirect.com/science/article/pii/S1878535221004093
Link to Scopus Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85114233663&doi=10.1016%2fj.arabjc.2021.103394&partnerID=40&md5=7ed0810 0cacbb3a0f4742bc14b6f4b74
Citation
Hadi, J. M., Aziz, S. B., Kadir, M. F. Z., El-Badry, Y. A., Ahamad, T., Hussein, E. E., . . . Alshehri, S. M. (2021). Design of plasticized proton conducting : chitosan:Dextran based biopolymer blend electrolytes for EDLC application: Structural, impedance and electrochemical studies. Arabian Journal of Chemistry, 14(11) doi:10.1016/j.arabjc.2021.103394
Abstract
In this study, selected physicochemical and heavy metal concentrations were identified and analyzed in leachate samples. The leachate samples were collected at four different stages namely; raw equalization pond (EqP), dissolved air floatation combined with coagulation (DAF1/coagulation), sequencing batch reactor (SBR), and dissolved air floatation combined with coagulation (DAF2/coagulation). For each stage, 19 parameters were tested covering 12 physiochemical parameters including pH, dissolved oxygen (DO), biochemical oxygen demand (BOD5), chemical oxygen demand (COD), color, ammonical nitrogen (NH3–N), total suspended solids (TSS), total dissolved solids (TDS), electrical conductivity (EC), total concentrations : of sodium (Na), magnesium (Mg), and calcium (Ca) as well as the total concentrations of seven heavy metals involving iron (Fe), copper (Cu), cadmium (Cd), lead (Pb), manganese (Mn), nickel (Ni), and zinc (Zn). Identifying the characteristics of the four leachate samples from each stage was aided with three different statistical methods consisting of descriptive, factor, and cluster analyses. The results of factor analysis showed that 95.34% of the total variation in the selected parameters was explained by two factors and identified as the responsible factors. Cluster analysis exhibited that the four ponds entirely have different properties (EqP, DAF1, SBR, and DAF2).
Arabian Journal of Chemistry : Volume 14, Issue 11, November 2021, Article number 103394
Ferulic Acid-Grafted Cellulose Nanocrystal Film as a Feasible Antimicrobial Finishing for Wound Dressing
Title (3)
:
Journal
: Journal of Natural Fibers : 2021
Document Type
: Article
Publisher
: Elsevier B.V.
UniKL Author
: Syarifah Ab Rashid, Amerrul Ilmi Mohd Razali, Woei Yenn Tong, Chean Ring Leong
Link to Full Text
:
Link to Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85115094538&doi=10.1080%2f15440478.2021.1967827&partnerID=40&md5=c51 24af83e6a3e7e03a4da469a81c21c
Scopus
https://www.tandfonline.com/doi/abs/10.1080/15440478.2021.1967827?journal Code=wjnf20
Citation
Rashid, S. A., Mohd Razali, A. I., Tong, W. Y., Leong, C. R., & Tan, W. N. (2021). Ferulic acid-grafted cellulose nanocrystal film as a feasible antimicrobial finishing : for wound dressing. Journal of Natural Fibers, doi:10.1080/15440478.2021.1967827
Abstract
Chronic wounds have affected more than 6 million people, especially diabetic populations. Various antimicrobial substances have been added to nanocellulosebased wound dressing to inhibit microbial growth. However, the substances triggered multiple adverse implications on humans. In this communication, we have developed a ferulic acid-grafted cellulose nanocrystal film as a potential antimicrobial material for wound dressing development. Needle-like cellulose nanocrystals, with an average length of 159 ± 31 nm, were extracted from medicalgrade cotton using the acid hydrolysis method. A combination of cellulose nanocrystals, polyvinyl alcohol (PVA) and ferulic acid has generated a soft, sturdy, : flexible, elastic and non-ductile film. It absorbed a large amount of exudates by presenting a swelling ratio of 774 ± 57%. The release of ferulic acid achieved a plateau at 20 h, with a total release of 75.4 ± 7.9% from the developed film. The ferulic acid-grafted cellulose nanocrystal film inhibited the growth of 2 Grampositive bacteria, 3 Gram-negative bacteria and 1 yeast. During the Hohenstein challenge and wash durability, the developed film retained its antimicrobial efficiency by reducing up to 82% microbial growth even after 20 washes. The findings exposed that the ferulic acid-grafted cellulose nanocrystal film is effective in combating wound pathogens and ideal for dressing development.
Microporous Erionite-activated Carbon Composite From Oil Palm Ash for Doxycycline Antibiotic Removal
Title (4)
:
Journal
: Environmental Processes : 2021
Document Type
: Article
Publisher
: Springer Nature
UniKL Author
: Mohammed Danish
Link to Full Text
: https://link.springer.com/article/10.1007/s40710-021-00535-x
Link to Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85114720178&doi=10.1007%2fs40710-021-00535x&partnerID=40&md5=6f408ce9b83b5dc3f3fb95098713e4f2
Scopus
Citation
Khanday, W. A., Khanday, S. A., Shah, M. A., Danish, M., & Okoye, P. U. (2021). Microporous erionite-activated carbon composite from oil palm ash for : doxycycline antibiotic removal. Environmental Processes, doi:10.1007/s40710-021-00535-x
Abstract
Microporous erionite-activated carbon (E-AC) composite was synthesized by activating oil palm ash followed by reacting with aluminum oxide (Al2O3) under alkaline conditions using hydrothermal method. The Al2O3 was added to the activated palm ash to balance the excess silica dioxide (SiO2) to obtain the erionite type of zeolite. The E-AC composite was employed to remove a potent pharmaceutical water pollutant, doxycycline antibiotic under batch adsorption. The effect of solution pH (3–13), doxycycline initial concentration, and temperature were screened in the batch study. The E-AC composite revealed appreciable surface area and average pore size of 467.23 m2/g and 2.765 nm, respectively, with abundant : chemical surface hydroxyl (-OH) and amine (N-H) adsorptive sites. The textural and surface chemistry greatly contributed to a high monolayer adsorption capacity of 353.81 mg/g at 50 °C. Also, the Langmuir isotherm with a high R2 of 0.99 for doxycycline adsorption on E-AC sufficiently described the equilibrium data. High monolayer adsorption capacity of E-AC compared to other adsorbents in the literature suggests the efficiency of this study. Novel composite synthesis was aimed to enhance the surface area and to increase the doxycycline removal capacity. These encouraging results show that the E-AC composite could pave the way for more lowcost composites to be used as adsorbents for pharmaceutical and other pollutant removals from wastewater.
Title (5)
:
Prevalence of work-related musculoskeletal disorders: Psychological and physical risk factors
Journal
:
International Journal of Environmental Research and Public Health: Volume 18, Issue 17, September 2021, Article number 9361
Document Type
: Article (Open Access)
Publisher
: MDPI
UniKL Author
: Omar Shawkataly
Link to Full Text
: https://www.mdpi.com/1660-4601/18/17/9361
Link to Scopus Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85114229785&doi=10.3390%2fijerph18179361&partnerID=40&md5=bf5e57a5119 a77b10ad899b5dd35453b
Citation
Krishnan, K. S., Raju, G., & Shawkataly, O. (2021). Prevalence of work-related musculoskeletal disorders: Psychological and physical risk : factors. International Journal of Environmental Research and Public Health, 18(17) doi:10.3390/ijerph18179361
Abstract
Purpose—This study aimed to estimate the prevalence and risk factors of MSD pain in various anatomical regions among nurses. Method—A cross-sectional study involving a self-ad-ministered questionnaire by registered nurses with clinical experience. Data was collected using convenience sampling after obtaining informed consent. The results were drawn from a total of 300 nurses. Results—The nurses presented with occasional mental exhaustion (44.3%) and often physical exhaustion (44.0%). Almost all (97.3%) the nurses complained of having workrelated pain during the last 12 months. Body parts with the most pain were the : lower back (86.7%), ankles (86.7%), neck (86.0%), shoulders (85.0%), lower legs (84.7%) and upper back (84.3%). The pain frequency was rated as occasional pain for the neck and upper back, pain was often felt for the rest of the parts. Nurses complained of severe pain in the lower back (19.7%), right shoulder (29.7%) and left shoulder (30.3%). The frequency of having musculoskeletal symptoms in any body region was increased with age, lower education level, female gender, high BMI, job tenure and lifestyle. Conclusions—Nurses’ WRMSD complaints should be taken seriously to curb further risk and musculoskeletal hazards. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Title (6)
Structural and electrochemical studies of proton conducting biopolymer blend : electrolytes based on MC:Dextran for EDLC device application with high energy density
Journal
: Alexandria Engineering Journal: 2021
Document Type
: Article (Open Access)
Publisher
: Elsevier B.V.
UniKL Author
: Ahmad S.F.M. Asnawi
Link to Full Text
: https://www.sciencedirect.com/science/article/pii/S1110016821006281
Link to Scopus Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85115431238&doi=10.1016%2fj.aej.2021.09.026&partnerID=40&md5=bfd76eabf9 d2bfd61758e76ad1add52c
Citation
Aziz, S. B., Ali, F., Anuar, H., Ahamad, T., Kareem, W. O., Brza, M. A., . . . Alshehri, S. M. (2021). Structural and electrochemical studies of proton conducting : biopolymer blend electrolytes based on MC:Dextran for EDLC device application with high energy density. Alexandria Engineering Journal, doi:10.1016/j.aej.2021.09.026
Abstract
This study shows preparation and characterization of solid biopolymer electrolyte based on glycerolized methylcellulose (MC): dextran-doped with ammonium thiocyanate (NH4SCN). The nature of electrolyte composition in terms of interaction is characterized using Fourier transform infrared (FTIR) technique. Lowering and shifting in the intensity of the bands are observed with increasing the quantity of glycerol as a plasticizer, confirming complexation between electrolyte components. Ion transport parameters are determined using both of the methods of EIS and FTIR where the parameters are found to be increased with glycerol concentration. The : transport number measurement indicates that ions are the primary charge carrier in the conduction mechanism where tion is found to be 0.961. The maximum DC ionic conductivity value is achieved that found to be 1.63 × 10−3 S cm−1. The ESR values are ranged from 300 to 580 Ω throughout 450 cycles. The technique of linear sweep voltammetry (LSV) shows the electrochemical stability window of 2 V for the conducting samples. The response of cyclic voltammetry (CV) shows an almost rectangular shape without Faradaic peaks. A galvanostatic charge–discharge investigation has shown the initial specific capacitance, energy density, and power density are 133 F g−1, 18.3 Wh Kg−1, and 680 W Kg−1, respectively. © 2021
The effect of graphene oxide and sebs-g-mah compatibilizer on mechanical and thermal properties of acrylonitrile-butadiene-styrene/talc composite
Title (7)
:
Journal
: Polymers: Volume 13, Issue 18, September 2021, Article number 3180
Document Type
: Article (Open Access)
Publisher
: Elsevier B.V.
UniKL Author
:
Link to Full Text
: https://www.mdpi.com/2073-4360/13/18/3180
Link to Scopus Preview
https://www.scopus.com/inward/record.uri?eid=2-s2.0: 85115330151&doi=10.3390%2fpolym13183180&partnerID=40&md5=9652a05ef8 8a2c1e75d5b0ff6616cb57
Citation
Abedin, F. N. J., Hamid, H. A., Alkarkhi, A. F. M., Abu Amr, S. S., Khalil, N. A., Yahaya, A. N. A., . . . Zulkifli, M. (2021). The effect of graphene oxide and sebs-g-mah : compatibilizer on mechanical and thermal properties of acrylonitrilebutadiene-styrene/talc composite. Polymers, 13(18) doi:10.3390/polym13183180
Abstract
In this study, acrylonitrile butadiene styrene (ABS)/talc/graphene oxide/SEBS-gMAH (ABS/Talc/GO/SEBS-g-MAH) and acrylonitrile butadiene styrene/graphene oxide/SEBS-g-MAH (ABS/GO/SEBS-g-MAH) composites were isolated with varying graphene oxide (0.5 to 2.0 phr) as a filler and SEBS-g-MAH as a compatibilizer (4 to 8 phr), with an ABS:talc ratio of 90:10 by percentage. The influences of graphene oxide and SEBS-g-MAH loading in ABS/talc composites were deter-mined on the mechanical and thermal properties of the composites. It was found that the incorporation of talc reduces the stiffness of composites. The analyses of mechanical and thermal properties of composites revealed that the inclusion of : graphene oxide as a filler and SEBS-g-MAH as a com-patibilizer in the ABS polymer matrix significantly improved the mechanical and thermal proper-ties. ABS/talc was prepared through melt mixing to study the fusion characteristic. The mechanical properties showed an increase of 30%, 15%, and 90% in tensile strength (TS), flexural strength (FS), and flexural modulus (FM), respectively. The impact strength (IS) resulted in comparable properties to ABS, and it was better than the ABS/talc composite due to the influence of talc in the composite that stiffens and reduces the extensibility of plastic. The incorporation of GO and SEBS-g-MA also shows a relatively higher thermal stability in both composites with and without talc.
Fatin Najwa Joynal Abedin, Hamidah Abdul Hamid, Nor Afifah Khalil, Ahmad Naim Ahmad Yahaya, Muzafar Zulkifli