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Talha Jawaid,Mehnaz Kamal,Richa Singh,Deepa Shukla,Vidya Devanathadesikan,Mukty Sinha 경희대학교 융합한의과학연구소 2018 Oriental Pharmacy and Experimental Medicine Vol.18 No.3
The aim of this study was to investigate the anticonvulsant and neuroprotective eff ects of methanolic extract of Cinnamomum camphora leaves (MECC) in albino wistar rats against maximal electroshock seizure (MES) and seizures induced by pentylenetetrazol (PTZ) models. Acetylcholinesterase (AChE) activity and oxidative stress parameters like malondialdehyde (MDA) and reduced glutathione (GSH) were estimated in the brains after completion of the anticonvulsant studies. MECC (50 and 100 mg/kg b.w., p.o. ) exhibited anticonvulsant activity as indicated by signifi cant ( P < 0.05, P < 0.01) reduction in the duration of hind limb tonic extensor phase in MES induced seizure model and signifi cantly ( P < 0.05, P < 0.01) increased the time of onset of clonic convulsion, decreased the duration of seizures, increased the % protection and decreased the percent mortality in a dose dependent manner. MECC (50 and 100 mg/kg b.w., p.o. ) exhibited neuroprotective activity as indicated by signifi cant reduction in MDA levels, AChE activity and increased GSH level also in a dose dependent manner. These results indicate that MECC may exert anticonvulsant and neuroprotective eff ects which may be attributed to the increase in the level of GABA, inhibition of AChE and infl ammation and antioxidant activity in the brain.
J. Naveen,M. Jawaid,E. S. Zainudin,Mohamed T. H. Sultan,R. Yahaya 한국섬유공학회 2019 Fibers and polymers Vol.20 No.8
This research investigated the effect of hybridizing Kevlar/cocos nucifera sheath and the effect of adding differentwt.% of Graphene nanoplatelets (GNP) on the interlaminar shear behaviour of laminated composites. Initially, different wt.% (0,0.25, 0.50, and 0.75) of GNP’s were mixed with epoxy resin through Ultrasonic-sonication. Then the laminated compositeswere fabricated by hand lay-up method followed by hot pressing. The weight ratio of Kevlar (K) and cocous nucifera sheath(CS) are 100/0 (S1), 75/25(S2), 50/50 (S3), 25/75(S4), and 0/100(S5). Interlaminar shear strengths (ILSS) of differentlaminates were evaluated using a short beam shear test. The results revealed that hybrid composites S2 (75/25) possess higherILSS than other laminates in the absence of GNP. Addition of GNP at 0.25 wt.% exhibited higher ILSS in all the laminates(S1 to S5) due to the improved interfacial properties. Further addition of GNP (0.50, and 0.75 wt.%) has declined the ILSS ofthe laminated composites due to aggregation and overlapping of GNP. XRD analysis reveals that at 0.25 wt.% of GNP, all thehybrid composites exhibited higher crystallinity index. Statistical analysis of the results has been performed using one way-ANOVA (Analysis of variance) and it shows that there is a statistically significant difference between the obtainedinterlaminar shear strength of the laminated composites.
A review on thermomechanical properties of polymers and fibers reinforced polymer composites
N. Saba,M. Jawaid 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.67 No.-
Polymer composites offered broad engineered applications, however their diversity get restricted owing to fluctuations in thermomechanical properties during heating or cooling hence great concern required prior their applications through thermomechanical analysis (TMA). Traditionally, TMA or dilatometry found to be simple, ideal, reliable, sensitive, excellent and basic thermal analytical technique. TMA provides valuable information on thermal expansion, glass transitions temperature (Tg), softening points, composition and phase changes on material of having different geometries simply by applying a constant force as a function of temperature. This compilation highlights the basics and experimental of TMA for both research and technical applications and also provide literature on TMA of polymers, hybrid composites, nanocomposites and their diverse applications.
Memristor Based Full Adder Circuit for Better Performance
Muhammad Khalid,Sana Mukhtar,Mohammad Jawaid Siddique,Sumair Faisal Ahmed 한국전기전자재료학회 2019 Transactions on Electrical and Electronic Material Vol.20 No.5
In this paper, we have designed memristor based AND, OR, and exclusive-OR (XOR) gates. With the help of these gates, memristor based full adder circuit has proposed. Simulation results of the proposed circuit including all above gates have been reported. Prominent improvement of the proposed circuit has been represented in power consumption 54.74%, delay 14.84%, and lesser transistor count with respect to conventional circuit.
Detection and Recognition of Vehicle License Plates using Deep Learning in Video Surveillance
Farooq, Muhammad Umer,Ahmed, Saad,Latif, Mustafa,Jawaid, Danish,Khan, Muhammad Zofeen,Khan, Yahya International Journal of Computer ScienceNetwork S 2022 International journal of computer science and netw Vol.22 No.11
The number of vehicles has increased exponentially over the past 20 years due to technological advancements. It is becoming almost impossible to manually control and manage the traffic in a city like Karachi. Without license plate recognition, traffic management is impossible. The Framework for License Plate Detection & Recognition to overcome these issues is proposed. License Plate Detection & Recognition is primarily performed in two steps. The first step is to accurately detect the license plate in the given image, and the second step is to successfully read and recognize each character of that license plate. Some of the most common algorithms used in the past are based on colour, texture, edge-detection and template matching. Nowadays, many researchers are proposing methods based on deep learning. This research proposes a framework for License Plate Detection & Recognition using a custom YOLOv5 Object Detector, image segmentation techniques, and Tesseract's optical character recognition OCR. The accuracy of this framework is 0.89.
The Mechanical Performance of Sugar Palm Fibres (Ijuk) Reinforced Phenolic Composites
Bushra Rashid,Zulkiflle Leman,Mohammad Jawaid,Mariyam Jameelah Ghazali,Mohamad Ridzwan Ishak 한국정밀공학회 2016 International Journal of Precision Engineering and Vol.17 No.8
Sugar palm fibres are one of the natural fibres which have many features and need further study to understand their properties. The aim of this work is to investigate the flexural, compressive and impact properties of sugar palm fibres reinforced phenolic composites. Sugar palm fibres were used as a filler (particle size 150 μm) and with loading of 0, 10, 20, 30, and 40 vol.%. The fibres were treated by sea water and then fabricated into composites by hot press technique. Flexural, compressive, and impact tests were carried out as per ASTM D790, ASTM D695-08a, and ASTM D256 standards, respectively. Scanning electron microscopy (SEM) was used to investigate the morphology and the interfacial bonding of the fibres-matrix in composites. The results show that the mechanical properties of the composites improve with the incorporation of fibres. The composite of 30 vol.% particle loading exhibit optimum values which are 32.23 MPa, 61.66 MPa, and 4.12 kJ/m2 for flexural, compressive, and impact strength, respectively. This was because good compatibility of fibre-matrix bonding. Consequently, sugar palm fibre is one of the prospective fibres and could be used as a potential resource to reinforcement polymer composite.
Reza Arjmandi,Harintharavimal Balakrishnan,Azman Hassan,Mohammad Jawaid,Alothman Y. Othman 한국섬유공학회 2018 Fibers and polymers Vol.19 No.4
In this study, the effects of hybrid magnesium hydroxide/montmorillonite (MH/MMT) on the flame retardancy, thermal, mechanical, morphological and thermo-mechanical properties of polyamide 6/polypropylene (PA6/PP) nanocomposites prepared by melt blending technique were investigated. The partial replacement of MH with MMT (2 and 4 wt%) was done at total filler content of 30 wt% and maleated polypropylene was used as compatibilizer. Mass loss calorimeter analysis revealed that the peak heat release rate and total heat evolved values reduced in the presence of MMT due to the formation of the protective surface and insulation layer by MMT within the MgO layer formed on the surface upon combustion. The char residue also strengthened by migration of MMT layers to the surface of char. The thermal stability and flame retardancy of PA6/PP/MH/MMT nanocomposites improved with increasing MMT content. The MMT layers were well dispersed in the nanocomposites. The stiffness and toughness of PA6/PP/MH nanocomposites increased while the strength maintained with incorporation of MMT. The degree of crystallinity of both PA6 and PP increased with the addition of MMT while the melting point remained unaltered. The synergistic combination of MH and MMT has indeed maintained the mechanical properties of nanocomposites while further improving the flame retardancy.