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A Review on the Advancement of Renewable Natural Fiber Hybrid composites: Prospects, challenges, and Industrial Applications

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Journal of Renewable Materials 2024年第7期12卷 1237-1290页

作者： Mohammed Mohammed Jawad K.oleiwi Aeshah M.Mohammed Anwar Ja’afar Mohamad Jawad Azlin F.osman Tijjani Adam bashir.o.betar.subash c.b.gopinath center of Excellence Geopolymer&Green Technology(cEGeoGTech) Universiti Malaysia PerlisArau02600Malaysia Faculty of chemical Engineering Technology Universiti Malaysia Perlis(UniMAP)Arau02600Malaysia Department of Materials Engineering University of TechnologyBaghdad10070Iraq Department of chemical Materials University of Bagdad College of Education for Pure Science Ibn-AlhaithamBaghdad10001Iraq Department of computer Techniques Engineering Al-Rafidain University CollegeBaghdad10001Iraq Faculty of Electronics Engineering Technology Universiti Malaysia PerlisKampus Uniciti Alam Sg.ChuchuhPerlis02100Malaysia Research center(NANocAT) University of MalayaKuala Lumpur50603Malaysia Institute of Nano Electronic Engineering Universiti Malaysia PerlisPerlis01000Malaysia center for Global Health Research Saveetha Medical College&HospitalSaveetha Institute of Medical and Technical Sciences(SIMATS)Tamil Nadu602105India

Naturalﬁbre(NFR)reinforced functional polymer composites are quickly becoming an indispensable sustainable material in the transportation industry because of their lightweight,lower cost in manufacture,and adaptability to a wide variety of ***,the major difﬁculties of using theseﬁbres are their existing poor dimensional stability and the extreme *** assessing the mechanical properties(MP)of composites,the interfacial bonding(Ib)happening between the NFR and the polymer matrix(PM)plays an incredibly signiﬁcant *** compared to NFR/syntheticﬁbre hybrid composites,hybrid composites(Hc)made up of two separate NFR are less prevalent;yet,these hybrid composites also have the potential to be valuable materials in terms of environmental issues.A new dimension to theﬂexibility of composites reinforced with NFR is added by the cost-effective manufacture of hybrid composites utilising *** purpose of this study is to offer an over-view of the keyﬁndings that were presented on hybrid *** emphasis was focused on the factors that inﬂuence the performance of the naturalﬁber composites,diverse approaches to enhancing MP,physical,electri-cal,and thermal characteristics of the *** study in polymer science gains interest for applications in con-struction and automotive industries.

关键词： Renewable naturalﬁber hybrid composites sustainability nanomaterial greener material

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Graphene synthesis,fabrication,characterization based on bottom-up and top-down approaches:An overview

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Journal of Semiconductors 2022年第6期43卷 8-22页

作者： Agbolade Lukman olatomiwa Tijjani Adam subash c.b.gopinath Sanusi Yekinni Kolawole oyeshola Hakeem olayinka U.Hashim Faculty of Electronic Engineering Technology Universiti Malaysia Perlis02600 ArauPerlisMalaysia Faculty of chemical Engineering Technology Universiti Malaysia Perlis02600 ArauPerlisMalaysia Institute of Nano Electronic Engineering Universiti Malaysia PerlisPerlisMalaysia Pure and Applied Physics Ladoke Akintola University of TechnologyNigeria centre of Excellence for Nanobiotechnology and Nanomedicine(coExNano) Faculty of applied SciencesAIMST UniversitySemeling08100 KedahMalaysia

This study presents an overview on graphene synthesis,fabrication and different characterization techniques utilized in the *** its discovery in 2004 by Andre Geim and Kostya Novoselov several research articles have been published globally to this effect,owing to graphene’s extraordinary,and exclusive characteristics which include optical transparency,excellent thermal,and mechanical *** properties and applications of this two-dimensional carbon crystal composed of single-layered material have created new avenues for the development of high-performance future electronics and technologies in energy storage and conversion for the sustainable ***,despite its potential and current status globally the difficulty in the production of monolayer graphene sheet still ***,this review highlighted two approaches in the synthesis of graphene,which are the top-down and bottom-up approaches and examined the advantages and failings of the methods *** addition,the prospects and failings of these methods are investigated,as they are essential in optimizing the production method of graphene vital for expanding the yield,and producing high-quality graphene.

关键词： two-dimensional material nanomaterial carbon material nanostructure

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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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Stress enhances expression of calcium-binding proteins and NMDAR subunit genes in the rat hippocampus

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Neuroprotection 2024年第2期2卷 167-178页

作者： Aravind Parthasarathy Ramesha Hanumanthappa Sarojini R.bulbule Kiran P.c. Hemalatha Nanjaiah gopinath G. Siddaiah b.M. David Muniswamy Devaraju Kuramkote Shivanna Neurochemistry Lab Department of BiochemistryKarnatak UniversityDharwadIndia Department of Microbiology and Immunology University of Maryland School of MedicineBaltimoreMarylandUSA Department of Zoology Karnatak UniversityDharwadIndia

backgrounds:oxidative stress impairs the function of calcium-binding proteins and deregulates calcium signaling in living *** have previously explored the overexpression of calcium-binding protein genes in a reactive oxygen and nitrogen species-induced in vitro cell model of stress that leads to ***,in in vivo models,low levels of stress leads to depressive-like ***,we aimed to analyze gene expression of major calcium-binding proteins(calcineurin,calmodulin,calsyntenin,synaptotagmin,and calreticulin)and N-methyl-D-aspartic acid(NMDA)receptor subunits(glutamate receptor ionotropic[GluN]GluN1,GluN2A,and GluN2b)in the hippocampus of stress-induced ***:Six-week-old male Wistar rats were assigned to two stress induction groups and a control group without stress(n=6).Stress was induced by using H_(2)o_(2)(3%in water)or by immobilization(using a sticky mat)over a period of 30 *** of calcium-binding protein genes in the hippocampus,antioxidant assays,structural alterations in hippocampal neurons,and depressive-like behavior were ***:Expression of genes encoding calcium-binding proteins calcineurin,calsyntenin,synaptotagmin and NMDA receptor subunit GluN1 was enhanced in both chemical and physical stress-induced rats compared with control rats(4.25±0.05 vs.1.03±0.02,pced rats,neurons in the cA2 region of the hippocampus were fewer and appeared disorganized compared with control ***,stressinduced rats showed decreased mobility and lower sucrose preference in behavioral studies compared with control ***:Lower levels of reactive oxygen and nitrogen species(RoNS)can also lead to stress in rats by affecting their calcium signaling,buffering capacity in the neurons leading to depressive symptoms.

关键词： calcineurin H_(2)o_(2) hippocampus immobilization NMDA receptors

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Selective phytochemicals targeting pancreatic stellate cells as new anti-fibrotic agents for chronic pancreatitis and pancreatic cancer

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Acta Pharmaceutica Sinica b 2020年第3期10卷 399-413页

作者： Puvanesswaray Ramakrishnan Wei Mee Loh subash cbgopinath Srinivasa Reddy bonam Ismail M.Fareez Rhanye Mac Guad Maw Shin Sim Yuan Seng Wu Ageing and Age-Associated Disorders Research Group Faculty of MedicineUniversity of MalayaKuala Lumpur 50603Malaysia Depanment of Pharmacology Faculty of MedicineUniversity of MalayaKuala Lumpur 50603Malaysia School of bioprocess Engineering Universiti Malaysia PerlisArau 02600Malaysia Institute of Nano Electronic Engineering Universiti Malaysia PerlisKangar 01000Malaysia UMR 7242 CNRS-University of StrasbourgBiotechnology and Cell Signaling/Laboratory of Excellence MedalisIllkirch 67400France Department of oral biology and biomedical Sciences Faculty of DentistryMAHSA UniversitySelangor 42610Malaysia Department of biomedical Science and Therapeutics Faculty of Medicine and Health ScienceUniversiti Malaysia SabahKota Kinabalu 88400Malaysia Department of Pharmaceutical Life Sciences Faculty of PharmacyUniversity of MalayaKuala Lumpur 50603Malaysia Department of biochemistry Faculty of Medicine Bioscience and NursingMAHSA UniversitySelangor 42610Malaysia

Activated pancreatic stellate cells(PScs)have been widely accepted as a key precursor of excessive pancreatic fibrosis,which is a crucial hallmark of chronic pancreatitis(cP)and its formidable associated disease,pancreatic cancer(Pc).Hence,anti-fibrotic therapy has been identified as a novel therapeutic strategy for treating cP and Pc by targeting *** of the anti-fibrotic agents have been limited to phaseⅠ/Ⅱclinical trials involving vitamin analogs,which are abundant in medicinal plants and have proved to be promising for clinical *** use of phytomedicines,as new anti-fibrotic agents,has been applied to a variety of complementary and alternative *** aim of this review was to present a focused update on the selective new potential anti-fibrotic agents,including curcumin,resveratrol,rhein,emodin,green tea catechin derivatives,metformin,eruberin A,and ellagic acid,in combating PSc in cP and Pc *** aimed to describe the mechanism(s)of the phytochemicals used,either alone or in combination,and the associated molecular *** of them were tested in Pc models with similar mechanism of actions,and curcumin was tested *** research may explore the issues of bioavailability,drug design,and nano-formulation,in order to achieve successful clinical outcomes with promising activity and tolerability.

关键词： Pancreatic stellate cells Anti-fibrotic chronic pancreatitis Pancreatic cancer Phytochemicals curcumin Resverastrol Rhein Emodin Green tea catechin

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Evolutionary Trajectory Planning for an Industrial Robot

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International Journal of Automation and computing 2010年第2期7卷 190-198页

作者： R.Saravanan S.Ramabalan c.balamurugan A.subash Department of Mechanical Engineering Bannariamman Institute of Technology Department of Mechanical Engineering J.J. College of Engineering and Technology Department of Production Engineering J.J.College of Engineering and Technology Department of Mechanical Engineering J.J.College of Engineering and Technology

This paper presents a novel general method for computing optimal motions of an industrial robot manipulator （Adeptone XL robot） in the presence of fixed and oscillating obstacles. The optimization model considers the nonlinear manipulator dynamics, actuator constraints, joint limits, and obstacle avoidance. The problem has 6 objective functions, 88 variables, and 21 constraints. Two evolutionary algorithms, namely, elitist non-dominated sorting genetic algorithm （NSGA-II） and multi-objective differential evolution （MoDE）, have been used for the optimization. Two methods （normalized weighting objective functions and average fitness factor） are used to select the best solution tradeoffs. Two multi-objective performance measures, namely solution spread measure and ratio of non-dominated individuals, are used to evaluate the Pareto optimal fronts. Two multi-objective performance measures, namely, optimizer overhead and algorithm effort, are used to find the computational effort of the optimization algorithm. The trajectories are defined by b-spline functions. The results obtained from NSGA-II and MoDE are compared and analyzed.

关键词： Multi-objective optimal trajectory planning oscillating obstacles elitist non-dominated sorting genetic algorithm (NSGA-II) multi-objective differential evolution (MoDE) multi-objective performance metrics.

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Detection of Influenza Viruses Attached to an optical Disk

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Journal of biomaterials and Nanobiotechnology 2013年第2期4卷 145-150页

作者： Takayuki Shima Makoto Fujimaki Akihiro Yoshida subash c. b. gopinath Masashi Kuwahara Yoshimichi ohki Koichi Awazu Department of Electrical Engineering and bioscience Waseda University Tokyo Japan. Electronics and Photonics Research Institute (ESPRIT) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Japan

Detection of polystyrene beads with a diameter of 100 nm was conducted using an optical disk drive tester equipped with a laser of 405 nm wavelength and an objective lens with a numerical aperture of 0.65. The polystyrene beads were used to mimic the influenza virus. A grooved disk with a (ZnS)85(Sio2)15/Sio2 layered surface structure was used for the detection. The detection of influenza viruses (A/Udorn/307/1972) with Au nanoparticles was also demonstrated using the optical disk drive tester. In this case, a grooved disk with an indium tin oxide (ITo) film was used. The ITo film functioned both to tune the reflectance of the disk and as an electrically conductive layer for scanning electron microscopy. In both cases, the target substances were successfully recognized in a single scan with a high scanning speed of 4.9 m/s. The results indicate that this optical disk system can be used to detect 100 nm scale substances like influenza viruses, which are smaller than the diffraction limit of the system.

关键词： Influenza Virus Polystyrene bead optical Disk Laser Reflectance Sensor Safety and Security

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Graphene-induced Pd nanodendrites： A high performance hybrid nanoelectrocatalyst

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Nano Research 2013年第9期6卷 635-643页

作者： subash chandra Sahu Aneeya K. Samantarat Ajit Dash R. R. Juluri Ranjan K. Sahu b. K. Mishra bikash Kumar Jena (1~3) colloids & Materials chemistry CSIR-Institute of Minerals and Materials Technology Bhubaneswar-7S I013 India Institute of Physics Bhubaneswar-751005 India Materials Science and Technology Division National Metallurgical Laboratory Jamshedpur-831007 India

A facile and green approach has been developed for the in situ synthesis of hybrid nanomaterials based on dendrite-shaped Pd nanostructures supported on graphene （RG）. The as-synthesized hybrid nanomaterials （RG-PdnDs） have been thoroughly characterized by high resolution transmission electron microscopy, X-ray photoelectron spectroscop）~ atomic force microscop）~ Raman spectroscopy and electrochemical techniques. The mechanism of formation of such dendrite- shaped Pd nanostructures on the graphene support has been elucidated using transmission electron microscopy （TEM） measurements. The RG induces the formation of, and plays a decisive role in shaping, the dendrite morphology of Pd nanostructures on its surface. cyclic voltammetry and chronoamperometry techniques have been employed to evaluate the electrochemical performance of RG-PdnDs towards oxidation of methanol. The electrochemical （Ec） activities of RG-PdnDs are compared with graphene-supported spherical-shaped Pd nanostructures, Pd nanodendrites alone and a commercial available Pd/c counterpart. The combined effect of the graphene support and the dendrite morphology of RG-PdnDs triggers the high electrocatalytic activity and results in robust tolerance to co poisoning.

关键词： nanodendrites reduced graphene methanol oxidation surface poisoning

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