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Effect of Microwave Power and Clamping Pressure on the Microwave Welding of Polypropylene Using Silicon Carbide Nanowhiskers as Microwave Susceptor

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Chinese Journal of Polymer Science 2022年第11期40卷 1466-1481页

作者： Phey Yee Foong Chun Hong Voon Bee Ying Lim Pei Leng Teh mohd Afendi Bin Rojan Nor Azizah Parmin Subash C.B.Gopinath mohd khairuddin md arshad Foo Wah Low Savisha Mahalingam Abreeza Manap Ruslinda A.Rahim Uda Hashim Institute of Nano Electronic Engineering Universiti Malaysia PerlisSeriabKangarPerlis01000Malaysia Faculty of Chemical Engineering Technology Universiti Malaysia PerlisJejawiPerlis Arau02600Malaysia Faculty of Mechanical Engineering Technology Universiti Malaysia PerlisPauhPerlis Arau02600Malaysia Department of Electrical&Electronic Engineering Lee Kong Chian Faculty of Engineering&ScienceUniversiti Tunku Abdul RahmanBandar Sungai LongKajangSelangor43000Malaysia Institute of Sustainable Energy Universiti Tenaga NasionalJalan IKRAM-UNITENKajangSelangor43000Malaysia

Due to their excellent dielectric properties and the rapid response to microwave irradiation,silicon carbide nanowhiskers(SiCNWs)were employed as microwave susceptor in this study to absorb microwave and locally melt the surrounding polypropylene(PP)substrates for the joining of PP *** welded joint is formed after the melted PP was cooled and *** than microwave susceptor,SiCNWs also acted as the nanofillers in strengthening the welded joint through the formation of SiCNWs reinforced PP nanocomposite at the interface of PP ***,the effect of microwave power on the microwave welding of PP substrates using SiCNWs as susceptor was studied and *** was found that the tensile strength and modulus of elasticity of the welded joint improved as microwave power ***,it deteriorates the flexibility of the welded joint as high stiffness SiCNWs were incorporated deeper into the PP matrix which restricted the PP chain *** from microwave power,clamping pressure is also critical in determining the mechanical properties of a welded *** compared to unclamped welded joint,the tensile strength,modulus of elasticity and flexibility of welded joint subjected to clamping pressure improved ***,the tensile strength of welded joint increased when the clamping pressure was increased from P1 to P3,but decreased when the clamping pressure was further increased to P4 due to the occurrence of flashing at welded *** formation mechanism of SiCNWs reinforced PP welded joint was also proposed in this *** to conventional welding,this welding process is easy,straightforward and is able to produce welded joint with outstanding mechanical properties via precise controlling of the processing ***,microwave welding is thought to offer an option for the joining of thermoplastics and other applications.

关键词： Microwave welding Silicon carbide Nanowhiskers Joining Susceptor

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Adsorption Isotherm and Kinetic Study of Methane on Palm Kernel Shell-Derived Activated Carbon

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Journal of Bioresources and Bioproducts 2023年第1期8卷 66-77页

作者： mohd Saufi md Zaini Muhammad arshad Syed Shatir A.Syed-Hassan School of Chemical Engineering College of EngineeringUniversiti Teknologi MARA Cawangan TerengganuKampus Bukit BesiDungun 23200Malaysia Department of Basic Science Jhang-Campus University of Veterinary and Animal ScienceLahore 35200Pakistan School of Chemical Engineering College of EngineeringUniversiti Teknologi MARAShah Alam 40450Malaysia

Activated carbon(AC)was synthesized from palm kernel shell(PKS)using different activating agents,i.e.,steam,carbon dioxide(CO 2),and CO 2-steam,in order to analyze the impact of acti-vating agents on the pore opening of *** this study,AC produced from PKS was found to have great potential as an adsorbent for methane *** different molecular diffusivity and reac-tivity of the combination of CO 2 and steam succeeded in producing AC with the highest burn-offof 78.57%,a surface area of 869.82 m 2/g,a total pore volume of 0.47 cm 3/g,and leading to maximum methane gas adsorption capacity of 4.500 mol/*** types of ACs exhibited the best fit with the Freundlich isotherm model,with the correlation coefficient(R 2)ranging from 0.997 to 0.999,indicating the formation of multilayer *** addition,the adsorption kinetic data for all ACs followed the pseudo-first-order model showing that the rate of adsorption was dependent on both the adsorbent and the adsorbate and was governed primarily by physical ad-sorption between the pore surface and methane *** results of intraparticle diffusion model indicated that the adsorption of methane was affected by both pore diffusion and exterior layer diffusion due to the different adsorption rates.

关键词： Palm kernel shell Activated carbon Methane adsorption Kinetic model Isotherm model

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Calf Posture Recognition Using Convolutional Neural Network

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Computers, Materials & Continua 2023年第1期74卷 1493-1508页

作者： Tan Chen Tung Uswah khairuddin mohd Ibrahim Shapiai Norhariani md Nor Mark Wen Han Hiew Nurul Aisyah mohd Suhaimie Malaysia-Japan International Institute of Technology Universiti Teknologi MalaysiaKuala Lumpur54100Malaysia Faculty of Veterinary Medicine Universiti Putra MalaysiaSelangor43400Malaysia Faculty of Bioresources and Food Industry Besut22200Malaysia

Dairy farm management is crucial to maintain the longevity of the farm,and poor dairy youngstock or calf management could lead to gradually deteriorating calf health,which often causes premature *** was found to be the most neglected part among the management workflows in Malaysia and has caused continuous loss over the recent *** posture recognition is one of the effective methods to monitor calf behaviour and health state,which can be achieved by monitoring the calf behaviours of standing and lying where the former depicts active calf,and the latter,passive *** posture recognition module is an important component of some automated calf monitoring systems,as the system requires the calf to be in a standing posture before proceeding to the next stage of monitoring,or at the very least,to monitor the activeness of the *** posture such as standing or resting can easily be distinguished by human eye,however,to be recognized by a machine,it will require more complicated frameworks,particularly one that involves a deep learning neural networks *** number of highquality images are required to train a deep learning model for such *** this paper,multiple ConvolutionalNeuralNetwork(CNN)architectures were compared,and the residual network(ResNet)model(specifically,ResNet-50)was ultimately chosen due to its simplicity,great performance,and decent inference *** ResNet-50 models having the exact same architecture and configuration have been trained on two different image datasets respectively sourced by separate cameras placed at different *** were two camera placements to use for comparison because camera placements can significantly impact the quality of the images,which is highly correlated to the deep learning model *** model training,the performance for both CNN models were 99.7%and 99.99%accuracies,respectively,and is adequate for a real-time calf monitoring system.

关键词： Calf posture machine vision deep learning transfer learning

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Kenaf cellulose-based poly(amidoxime) ligand for adsorption of rare earth ions

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Rare Metals 2019年第3期38卷 259-269页

作者： md Lutfor Rahman mohd Sani Sarjadi Sazmal Effendi arshad Mashitah M. Yusoff Shaheen M. Sarkar Baba Musta Faculty of Science and Natural Resources Universiti Malaysia Sabah Faculty of Industrial Sciences and Technology University Malaysia Pahang

A well-known adsorbent, poly(amidoxime)ligand, was prepared from polyacrylonitrile(PAN) grafted kenaf cellulose, and subsequent characterization was performed by Fourier transform infrared spectroscopy(FTIR),field emission scanning electron microscope(FESEM) and inductively coupled plasma mass spectrometry(ICP-MS).The adsorption capacities of the prepared ligand for rare earth metals are found to be excellent, with adsorptions of La^(3+), Ce^(3+), Pr^(3+), Gd^(3+) and Nd^(3+) experimentally determined to be 262, 255, 244, 241 and 233 mg·g^(-1), respectively, at pH 6. The experimental values of the adsorption of rare earth metals are well matched with the pseudosecond-order rate equation. The reusability of the adsorbent is examined for seven cycles of sorption/desorption,demonstrating that the proposed adsorbent could be reused for over seven cycles without any significant loss in the original removal capability of the ligand.

关键词： Adsorption Poly(amidoxime) Rare earths Separation Kenaf cellulose

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Synthesis of ion imprinted polymers for selective recognition and separation of rare earth metals

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Journal of Rare Earths 2017年第2期35卷 177-186页

作者： Mashitah M.Yusoff Nik Rohani Nik Mostapa md Shaheen Sarkar Tapan Kumar Biswas md Lutfor Rahman Sazmal Effendi arshad mohd Sani Sarjadi Ajaykumar D.Kulkarni Faculty of Industrial Sciences and Technology University Malaysia Pahang Faculty of Science and Natural Resources Universiti Malaysia Sabah Department of Applied Sciences MIT Academy of Engineering

Lanthanide-ion imprinted polymers（L-IIPs） were synthesized by stoichiometric amounts of rare earth ions and the cavities in the polymers were created for the corresponding lanthanide ions. The maximum sorption capacities were estimated to be 125.3, 126.5, 127.6, 128.2 and 129.1 mg/g for Pr, Nd, Sm, Eu and Gd, respectively at p H 6. In the selectivity study, the L-IIPs exhibited good selectivity to the specific rare earth ions in the presence of coexisting cations. The imprinting results were found to be excellent with some rare earth ions over other competitor rare earth ions with the same charges and close ionic radius.

关键词： ion-imprinted polymers rare earths separation adsorption lanthanide-ions

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An Exploratory Study of University X＇s State of Readiness： Scholarship of Teaching, Shared Governance and Change Management

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Sociology Study 2012年第5期2卷 362-375页

作者： Hamzah Bin md.Omar mohd khairuddin Abdullah Universiti Malaysia Sabah Malaysia

In this paper we first explore what scholarship of teaching （SOT）, shared governance and change management means, both in terms of the way that is represented in the literature and the way that is understood by academic staff themselves. From this information we derive qualitative and quantitative interpretation which captures the variations found in the literature and empirical studies. In the final section we illustrate how the state of readiness in the three areas is in place for the development of the SoT, shared governance, and change management in University X.

关键词： University scholarship of teaching (SOT) shared governance change management readiness

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Evaluation of antihepatotoxic potential of Solanum xanthocarpum fruit extract against antitubercular drugs induced hepatopathy in experimental rodents

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Asian Pacific Journal of Tropical Biomedicine 2012年第6期2卷 454-460页

作者： Talib Hussain Ramesh K Gupta Sweety K mohd Sajid Khan md Sarfaraj Hussain md Arif arshad Hussain md Faiyazuddin Chandana Venkateswara Rao Pharmacognosy and Ethnopharmacology Division National Botanical Research Institute Department of Pharmacology and Toxicology Faculty of Pharmacy Integral University Department of Pharmacology Royal College of Pharmacy and Health Sciences Department of Biotechnology Integral University

Objective:To assess the hepatoprotective effect of Solanum xanthocarpum(S. xanthocarpum) fruit extract against antitubercular drug-induced liver toxicity in experimental ***:Ethanolic(50%) fruit extract ofS. xanthocarpum(100, 200 and 400 mg/kg bw) was administered daily for 35 days in experimental animals. Liver toxicity was induced by combination of three antitubercular drugs [isoniazid(I) 7.5 mg/kg, rifampicin(R) 10 mg/kg and pyrazinamide(P) 35 mg/kg] given orally as suspension for 35 days in rats. The hepatoprotective activity was assessed using various biochemical parameters like aspartate aminotransferase(AST), alanine aminotransferase(ALT), alkaline phosphatise(ALP), total bilirubin(TBL), albumin(ALB), total protein(TP), lactate dehydroginase(LDH), and serum cholesterol(CHL). Meanwhile,in vivoantioxidant activities as lipid peroxidation(LPO), reduced glutathione(GSH), superoxide dismutase(SOD) and catalase(CAT) were measured in rat liver homogenate. The biochemical observations were supplemented by histopathological ***:The results demonstrated that treatment ***(P<0.05-P<0.001) and dose-dependently prevented drug induced increase in serum levels of hepatic enzymes. Furthermore,S. xanthocarpumsignificantly(up toP<0.001) reduced the LPO in the liver tissue and restored activities of defence antioxidant enzymes GSH, SOD and CAT towards normal levels. Histopathology of the liver tissue showed that S. xanthocarpumattenuated the hepatocellular necrosis and led to reduction in inflammatory cells ***:The results of this study strongly indicate the protective effect of S. xanthocarpumagainst liver injury which may be attributed to its hepatoprotective activity, and thereby scientifically support its traditional use.

关键词： Solanum xanthocarpum Rifampicin Isoniazid Pyrazinamide Antioxidant Antihepatotoxicity Hepatoprotective effect Antitubercular drug Liver toxicity Liver injury Biochemical parameter Histopathology

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Genetic association study of P2x7 A1513C(rs 3751143) polymorphism and susceptibility to pulmonary tuberculosis: A meta-analysis based on the findings of 11 case-control studies

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Asian Pacific Journal of Tropical Medicine 2016年第12期9卷 1126-1134页

作者： Eyad M.A.Alshammari Raju K.Mandal mohd Wahid Sajad A.Dar arshad Jawed Mohammed Y.Areeshi Saif Khan md.Ekhlaque Ahmed Khan Aditya K.Panda Shafiul Haque Department of Clinical Nutrition College of Applied Medical SciencesUniversity of Ha’il Research and Scientific Studies Unit College of Nursing & Allied Health SciencesJazan University The University College of Medical Sciences & GTB Hospital (University of Delhi) Centre for Life Sciences Central University of Jharkhand

Objective:To summarize the precise association between pulmonary tuberculosis(PTB) and P2x7 A1513 C gene ***:PubMed and Google Scholar web-databases were searched for the studies reporting the association of P2x7 A1513 C polymorphism and PTB risk.A meta-analysis was performed for the selected case-control studies and pooled odds ratios(ORs) and 95%confidence intervals(95%CIs) were calculated for all the genetic ***:Eleven studies comprising 2 678 controls and 2 113 PTB cases were included in this *** observed overall no significant risk in all the five genetic *** stratified population by the ethnicity,Caucasian population failed to show any risk of PTB in all the genetics *** Asian ethnicity,variant allele(C vs.A:P=0.001;QR=1.375,95%CI=1.159-1.632) and heterozygous genotype(AC ***:P=0.001;OR=1.570,95%CI=1.269-1.944) demonstrated significant increased risk of ***,recessive genetic model(CC+AC ***:P=0.001;OR=1.540,95%CI= 1.255-1.890) also demonstrated increased risk of PTB in ***:Our meta-analysis did not suggest the association of P2x7 A1513 C polymorphism with PTB risk in overall or separately in Caucasian ***,it plays a significant risk factor for predisposing PTB in *** larger sample and expression studies are needed to validate this association.

关键词： Genetic model Meta-analysis Polymorphism P2x7 gene Pulmonary tuberculosis

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