检索结果-南通市图书馆

Journal of Bionic Engineering 2016年第3期13卷 426-435页

作者： Mohammad Asim Mohammad jawaid Khalina Abdan Mohamad Ridzwan lshak Laboratory of Biocomposite Technology Institute of Tropieal Forestry and Forest Products (1NTR OP) Universiti Putra Malaysia Serdang 43400 Malaysia Department of Biological and Agricultural Engineering Faculty of Engineering Universiti Putra Malaysia Serdang 43400 Malaysia Department of Aerospace Engineering Universiti Putra Malaysia Serdang 43400 Malaysia

Natural fibres are very versatile materials, their properties vary with chemical composition and physical structure. The effects of alkali, silane and combined alkali and silane treatments on the mechanical （tensile）, morphological, and structural properties of Pine Apple Leave Fibres （PALF） and Kenaf Fibres （KF） were investigated with the aim to improve their com- patibility with polymer matrices. The effectiveness of the alkali and saline treatments in the removal of impurities from the fibre surfaces was confirmed by Scanning Electron Microscopy （SEM） and Fourier Transform Infrared spectrometry （FTIR） ob- servation. The morphological study of treated PALF and KF by SEM indicates that silane treated fibres have less impurities and lignin and hemicelluloses removed than those by other chemical treatments. Silane treated PALF and KF display better tensile strength than those of untreated, alkaline and NaOH-silane treated. Droplet test indicates that the lnterfacial Stress Strength （IFSS） of alkali and silane treated PALF and KF are enhanced whereas silane treated fibres display highest IFSS. It is assumed that fibre treatments will help to develop high performance KF and PALF reinforced polymer composites for industrial appli- cations.

关键词： pineapple leaves fibre kenaf fibre chemical treatment tensile properties structural properties droplet test

Effects of Surface Treatments on Tensile, Thermal and Fibre-matrix Bond Strength of Coir and Pineapple Leaf Fibres with Poly Lactic Acid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2018年第6期15卷 1035-1046页

作者： Ramengmawii Siakeng Mohammad jawaid Hidayah Ariffin Mohd Sapuan Salit Higher Institution Centre of Excellence Wood and Tropical Fibre (HiCoE) Institute of Tropical Forestry and Forest Products ( INTROP) Universiti Putra Malaysia Serdang 43400 Malaysia Department of Chemical Engineering College of Engineering King Saud University Riyadh 11451 Kingdom of Saudi Arabia Department of Bioprocess Technology Faculty of Biotechnology and Biomoleeular Sciences Universiti Putra Malaysia Serdang 43400 Malaysia Department of Mechanical and Manufacturing Engineering Faculty of Engineering Universiti Putra Malaysia Serdang 43400 Malaysia

Coir Fibres （CF） and Pineapple Leaf Fibres （PALF） are valuable natural fibres which are abundantly available in Malaysia as agricultural wastes. The aim of this study is to investigate the effects of alkali （6%）, silane （2%）, and calcium hydroxide （6%） on tensile, morphological, thermal, and structural properties of CF and PALF to improve their interfacial bonding with Polylactic Acid （PLA） matrix. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to observe the effectiveness of the chemical treat- ments in the removal of impurities. Alkali treated fibres yield the lowest fibre diameter and the highest Interfacial Stress Strength （IFSS）. Thermogravimetric Analysis （TGA） shows improved thermal stability in silane treated CF and alkali treated PALF. It is assumed that fibre treatments can help to develop biodegradable CF and PALF reinforced PLA biocomposites for industrial applications.

关键词： natural fibre surface treatment tensile properties fibre-matrix bond strength thermal properties

A Study on Opportunities and Challenges for the Development of CPEC

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Study on Opportunities and Challenges for the Development ...

作者： jawaid 山东大学

学位级别：硕士

The Chin.-Pakistan Economic Corridor（CPEC）the latest venture in a history of bilateral economic cooperation,with a $46 billion investment in energy and infrastructure development in Pakistan is considered a game changer for Pakistan’s *** a flagship project of Chin.’s One Belt One Road initiative,the corridor will connect Kashgar in Western Chin. with the port of Gwadar in Pakistan on the Arabian Sea,serving as a gateway to the Middle East,Africa,and Central *** CPEC,in addition to boosting Pakistan’s economy and meeting Chin.’s energy needs and development of its western region,is likely to bring stability in the region through economic ***,projects of such scale certainly face equally significant challenges and have opportunities for *** study examines challenges and opportunities which CPEC can offer to both *** that have the potential to affect the implementation of the project,including the unstable situation in Afghanistan,competing interests of immediate neighbors like India and Iran,especially India’s suspicions,and *** about the *** the other hand,opportunities include and cost-effective access to the Indian Ocean and further to the Middle East and Africa through Gwadar Port,and Chin. aims to address the internal security concerns in its restive western region of Xinjiang through economic ***,US$46 billion offer a special opportunity to Pakistan to address some of the main roadblocks to its economic growth such as the energy crisis,poor communication infrastructure,and narrow foreign *** study includes wide range of scholarly and peer-reviewed literature,academic journals,thin.-tank reports,and government-sponsored *** from their analysis,though,is the consideration of the regional geo-political dynamics and Pakistan’s domestic challenges particularly insecurity and violence that can affect the implementation of the CPEC ***

关键词：中巴经济走廊双边经济合作成本效益巴基斯坦

A mini-review on MXenes as versatile substrate for advanced sensors

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Chin.se Chemical Letters 2020年第4期31卷 922-930页

作者： Razium Ali Soomro Sana jawaid Qizhen Zhu Zaheer Abbas Bin Xu Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites Beijing Key Laboratory of Electrochemical Process and Technology for MaterialsBeijing University of Chemical TechnologyBeijing 100029China National Centre of Excellence in Analytical Chemistry University of SindhJamshoro 76080Pakistan

MXenes have emerged as versatile 2D materials that are already gaining paramount attention in the areas of energy,catalyst,electromagnetic shielding,and *** unique surface chemistry,graphene-like mo rphology,high hydrophilicity,metal-like conductivity with redox capability identifies MXenes,as an ideal material for surface-related *** short review summarizes the most recent reports that discuss the potential application of MXenes and their hybrids as a transducer material for advanced *** on the nature of transducing signals,the discussion is categorized into three sections,which include electrochemical(bio)sensors,gas sensors,and finally,electro-chemiluminescence&fluorescent *** review provides a concise summary of all the analytical merits obtained subsequent to the use of MXenes,followed by endeavors that have been made to accentuate the future perspective of MXenes in sensor devices.

关键词： MXenes Electrochemical sensors Gas sensors Electrochemiluminescent sensor Fluorescent sensors

Modification of Oil Palm Empty Fruit Bunch and Sugarcane Bagasse Biomass as Potential Reinforcement for Composites Panel and Thermal Insulation Materials

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2019年第1期16卷 175-188页

作者： Nor Azlina Ramlee Mohammad jawaid Edi Syams Zainudin Shaikh Abdul Karim Yamani Department of Biocomposite Laboratory Institute of Tropical Forestry and Forest Products (INTROP)Universiti Putra Malaysia 43400 SerdangSelangorMalaysia Department of Mechanical and Manufacturing Engineering Faculty of EngineeringUniversiti Putra Malaysia 43400 SerdangSelangorMalaysia Faculty of Applied Science Wood Industry Universiti Teknologi MARA Campus of Jengka 26400 Bandar Tun Abdul Razak JengkaPahangMalaysia

This paper focuses on the study of the effect of modification of Oil Palm Empty Fruit Bunch(OPEFB)and sugarcane bagasse(SCB)biomass as potential reinforcement for composites panel and thermal *** fibres were treated with three types of chemicals:2%silane,4%H2O2 and 4%H2O2-2%silane for 3 *** influence of modified fibres content in composites was examined by structural changes using image analyser,Fourier transform infrared(FTIR),Scanning Electron Microscopy(SEM),tensile,interracial shear strength(IFSS)and thermal *** diameter of both fibres was reduced after treatment and showed decreasing of lignin and hemi-cellulose in *** strength has been increased by 2%silane treatment for both fibres and 4%H2O2 treatment displays higher result for *** properties of treated SCB fibre with silane display higher residual content and better thermal *** charac-terization showed that 2%silane treatment removed silica bodies of OPEFB fibre while 4%H2O2 treatment uniformly filled porosity of SCB ***,results revealed that treated OPEFB fibre is enough to improve compatibility and mechanical properties,while treated SCB fibre was effective in thermal stability for fabrication of composite materials.

关键词： oil palm empty fruit bunch sugarcane bagasse fibre treatment tensile properties thermal properties interracial shear strength

Energy consumption of electrooxidation systems with boron-doped diamond electrodes in the pulse current mode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 106-112页

作者： Jun-jun Wei Xu-hui Gao Li-fu Hei jawaid Askari Cheng-ming Li Institute of Advanced Materials and Technology University of Science and Technology Beijing Institute of Manufacturing Engineering National University of Sciences & Technology (NUST)

A pulse current technique was conducted in a boron-doped diamond （BDD） anode system for electrochemical waste- water treatment. Due to the strong generation and weak absorption of hydroxyl radicals on the diamond surface, the BDD elec- trode possesses a powerful capability of electrochemical oxidation of organic compounds, especially in the pulse current mode. The influences of pulse current parameters such as current density, pulse duty cycle, and frequency were investigated in terms of chemical oxygen demand （COD） removal, average current efficiency, and specific energy consumption. The results demon- strated that the relatively high COD removal and low specific energy consumption were obtained simultaneously only if the current density or pulse duty cycle was adjusted to a reasonable value. Increasing the frequency slightly enhanced the COD re- moval and average current efficiency. A pulse-BDD anode system showed a stronger energy saving ability than a constant-BDD anode system when the electrochemical oxidation of phenol of the two systems was compared. The results prove that the pulse current technique is more cost-effective and more suitable for a BDD anode system for real wastewater treatment. A kinetic analysis was presented to explain the above results.

关键词： diamond fihlls boron doping electrochemical oxidation hydroxyl radicals energy consumption wastewater treat- ment

Ionotropic receptors mediate olfactory learning and memory in Drosophila

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Insect Science 2024年第4期31卷 1249-1269页

作者： Md Zeeshan Ali Anushree Aarif Ahsan Mohammad Shamsul Ola Rizwanul Haque jawaid Ahsan Department of Biotechnology Central University of South BiharGayaBiharIndia Department of Radiation Oncology University of MichiganAnn ArborMichiganUSA Department of Biochemistry College of ScienceKing Saud UniversityRiyadhSaudi Arabia

Phenylacetaldehyde(PAH),an aromatic compound,is present in a diverse range of fruits including overripe bananas and prickly pear cactus,the two major host fruits for Drosophila *** acts as a potent ligand for the ionotropic receptor 84a(IR84a)in the adult fruit fly and it is detected by the IR84a/IR8a heterotetrameric *** role in the male courtship behavior through IR84a as an environmental aphrodisiac is of additional *** ***,two distinct kinds of olfactory receptors,that is,odorant receptors(ORs)and ionotropic receptors(IRs),perceive the odorant *** display unique structural,molecular,and functional characteristics in addition to having different evolutionary ***,olfactory cues detected by the ORs such as ethyl acetate,1-butanol,isoamyl acetate,1-octanol,4-methylcyclohexanol,*** as aliphatic esters and alcohols have been employed in olfactory classical conditioning using fruit *** underlines the participation of OR-activated olfactory pathways in learning and memory *** study elucidates that likewise ethyl acetate(EA)(an OR-responsive odorant),PAH(an IR-responsive aromatic compound)too can form learning and memory when associated with an appetitive gustatory *** association of PAH with sucrose(PAH/SUC)led to learning and formation of the long-term memory(LTM).Additionally,the Orco^(1),Ir84a^(MI00501),and Ir8a^(1)mutant flies were used to confirm the exclusive participation of the IR84a/IR8a complex in PAH/SUC olfactory associative *** results highlight the involvement of IRs via an IR-activated pathway in facilitating robust olfactory behavior.

关键词： appetitive conditioning Drosophila melanogaster ethyl acetate ionotropic receptors learning and memory phenylacetaldehyde

Metabolic regulation of microglial phagocytosis:Implications for Alzheimer’s disease therapeutics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Translational Neurodegeneration 2023年第1期12卷 205-224页

作者： Izabela Lepiarz-Raba Ismail Gbadamosi Roberta Florea Rosa Chiara Paolicelli Ali jawaid Laboratory for Translational Research in Neuropsychiatric Disorders(TREND) BRAINCITY:Center of Excellence for Neural Plasticity and Brain DisordersNencki Institute of Experimental BiologyWarsawPoland Swiss Federal Institute of Technology(ETH) ZurichSwitzerland Department of Biomedical Sciences University of LausanneLausanneSwitzerland

Microglia,the resident immune cells of the brain,are increasingly implicated in the regulation of brain health and *** perform multiple functions in the central nervous system,including surveillance,phagocytosis and release of a variety of soluble ***,a majority of their functions are closely related to changes in their *** natural inter-dependency between core microglial properties and metabolism offers a unique opportunity to modulate microglial activities via nutritional or metabolic *** this review,we examine the existing scientific literature to synthesize the hypothesis that microglial phagocytosis of amyloid beta(Aβ)aggregates in Alzheimer’s disease(AD)can be selectively enhanced via metabolic *** first review the basics of microglial metabolism and the effects of common metabolites,such as glucose,lipids,ketone bodies,glutamine,pyruvate and lactate,on microglial inflammatory and phagocytic ***,we examine the evidence for dysregulation of microglial metabolism in *** is followed by a review of in vivo studies on metabolic manipulation of microglial functions to ascertain their therapeutic potential in ***,we discuss the effects of metabolic factors on microglial phagocytosis of healthy synapses,a pathological process that also contributes to the progression of *** conclude by enlisting the current challenges that need to be addressed before strategies to harness microglial phagocytosis to clear pathological protein deposits in AD and other neurodegenerative disorders can be widely adopted.

关键词： Microglia Metabolism Alzheimer’s disease Neurodegeneration Inflammation Phagocytosis

Flexural and Dynamic Mechanical Properties of Alkali-Treated Coir/Pineapple Leaf Fibres Reinforced Polylactic Acid Hybrid Biocomposites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2021年第6期18卷 1430-1438页

作者： Ramengmawii Siakeng Mohammad jawaid Mohammad Asim Hassan Fouad Sameer Awad Naheed Saba Suchart Siengchin Department of Mechanical and Process Engineering The Sirindhorn International Thai-GermanGraduate School of Engineering(TGGS)King Mongkut’s University of Technology North BangkokBangkok10800Thailand Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products(INTROP)Universiti Putra Malaysia43400 UPMSerdangSelangorMalaysia Applied Medical Science Department Community CollegeKing Saud UniversityP.O.Box 10219Riyadh11433Saudi Arabia Chemistry School of Science and TechnologyUniversity of New EnglandArmidaleNSW2351Australia

Polylactic acid(PLA)possesses good mechanical and biodegradability properties which make it a suitable material for polymer composites whereas brittleness and high costs limit its utilization in various *** reinforcement of natural fibres with biopolymers has been formed to be an efficient technique to develop composites having the ability to be fully *** study concerns with the incorporation of various percentages of untreated and alkali-treated Coir Fibres(CF)and pineapple leaf fibres(PALF)in PLA biocomposites and characterizations of flexural,morphological and dynamic mechanical *** properties showed that the treated C1P1 hybrid composites(C1P1A)displayed highest flexural strength(35.81 MPa)and modulus(5.28 GPa)among all hybrid *** Electron Microscopy(SEM)revealed a behaviour of fibre-matrix adhesion in untreated treated *** observation revealed good dispersion of the fillers in *** mechanical analysis revealed that C1P1A showed highest glass transition temperature(Tg)and storage modulus(E')while untreated C3P7 displayed the least Tg and E'.Overall findings showed that alkali-treated hybrid biocomposites(CF/PALF/PLA)especially C1P1A have improved flexural properties,dynamic and morphological properties over untreated *** of these findings will provide attracting consideration of these hybrid biocomposites for various lightweight uses in a broad selection of industrial applications such as biomedical sectors,automobile,construction,electronics equipment,and hardware tools.

关键词： Coir fibres Pineapple leaf fibres Biocomposites Polylactic acid Mechanical properties Dynamic mechanical properties

Impact of Ptal (Public Transport Access Level) on Pedestrian and Bicyclist Safety

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of Ptal (Public Transport Access Level) on Pedestrian...

作者： Muhammad Salman jawaid 东南大学

学位级别：硕士

This research work is on pedestrian and bicyclist safety and the impact of PTAL levels upon them and when it comes to safety,pedestrians and cyclists are at an inherent *** like AASHTO,TRB,ITE and ASCE are working on bicyclist and pedestrian *** research done on pedestrian and bicyclist safety shows key information about the type number and severity of crashin. is lacking and there is also a lack of transferrable and standardized exposure data and this lack of data and studies results in inability to draw any authentic conclusion about the impact of work on pedestrian and bicyclist *** current technological advancements and their impact on pedestrian and bicyclist safety are also *** for London TfL is responsible for the Transport system in London *** Time Mapping,Catchment Analysis,and PTAL are the techniques used by TfL for connectivity *** is an easily calculated and simple technique that hin.es on the distance from any place or point to the nearest public transport stop,In total there are 9PTAL values ranging from 0 to 6 including sub values of 1 and 6,（0,1a,1b,2,3,4,5,6a,6b）.The lowest PTAL value 1a show the poor connectivity with the public transport and the highest PTAL value 6b shows best *** calculation procedure of PTAL includes the calculation of Walk-time to SAPs,Scheduled Waiting time,Average Waiting Time,Total Access Time,Equivalent Doorstep Frequency and Access *** finally calculated Access Index in then converted to PTAL level with the help of the table provided by *** data used in our project was taken from London Data Store and the data of LSOA（Lower Service Operational Area）11 of Greater London was *** and zero inflated negative models were fitted to the three responses of Total number of accidents,total number of pedestrian accidents and total number of bicycle accidents,in order to perform model comparisons AIC and BIC information criteri

关键词： IMPACT OF PTAL PEDESTRIAN BICYCLIST SAFETY