检索结果-南通市图书馆

Dimensional Stability Properties of Medium Density Fibreboard (MDF) from Treated Oil Palm (Elaeis guineensis) Empty Fruit Bunches (EFB) Fibres

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Composite Materials 2016年第4期6卷 91-99页

作者： Zawawi Ibrahim Mansur Ahmad astimar abdul aziz Ridzuan Ramli Mohd Ariff Jamaludin Suhaimi Muhammed Aisyah Humaira Alias Malaysian Palm Oil Board (MPOB) Biomass Technology Centre Engineering and Processing Division Jalan Sekolah Pekan Bangi Lama Kajang Malaysia Faculty of Applied Sciences Universiti Teknologi MARA Shah Alam Malaysia Department of Bio-Composite Technology Institute of Tropical Forestry and Forest Product (INTROP) Universiti Putra Malaysia Serdang Malaysia

The aim of the study was to investigate the effect of pre-treatments by using sodium hydroxide (NaOH) and acetic acid on oil palm Empty Fruit Bunch (EFB) fibres for the production of Medium Density Fibreboard (MDF). The EFB fibres were treated with chemicals in the concentration range of 0.2%, 0.4%, 0.6% and 0.8% prior to refining. Single-homogenous layer MDF with 12 mm thickness and density of 720 kg/m3 was produced. Urea-Formaldehyde (UF) was applied at 10% loading (based on dry weight of dry fibres) as a binder. The physical properties (Water Absorption (WA) and Thickness Swelling (TS)) of the produced panels were tested according to European Standard, EN 622-5:2006. The results show that types of chemical used had greater effects than concentration on the dimensional stability of the MDF. EFB fibres treated with acetic acid produced MDF with better dimensional stability compared to the MDF NaOH treated fibres. High concentration of NaOH produced poor dimensional stability in the panels.

关键词： Empty Fruit Bunch Sodium Hydroxide Acetic Acid Dimensional Stability Thickness Swelling Water Absorption

Development of Cu Nanoparticle Loaded Oil Palm Fibre Reinforced Nanocomposite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Nanoparticles 2013年第4期2卷 358-365页

作者： Ridzuan Ramli Maksudur Rahman Khan Najmul Kabir Chowdhury Mohammad Dalour Hossen Beg Rohaya Mohamed Halim astimar abdul aziz Zawawi Ibrahim Nahrul Hayawin Zainal Engineering and Processing Division Malaysian Palm Oil Board (MPOB) Kajang Selangor Malaysia Faculty of Chemical and Natural Resources Engineering University of Malaysia Pahang (UMP) Kuantan Malaysia

Functionalized copper nanoparticles (FCuNPs) have been synthesized by chemical reduction method and polyvinyl alcohol (PVA) performed as a stabilizer in that medium. Analysis observed that the average size of the synthesized FCuNPs was 3.5 nm. The obtained FCuNPs were loaded in the oil palm empty fruit bunch (EFB) natural fibre. Before the loading of FCuNPs in EFB fibres, the surface of the fibres is tailored by the cationic agent CHPTAC since they have a natural tendency to exhibit negatively charged surface owing to the presence of large amount of hydroxyl groups. Thereafter, different types of composite were developed and their properties were studied. The composites were developed by using the untreated empty fruit bunch (UEFB) fibres and FCuNPs loaded EFB (NP-CAEFB) fibres with commercially available unsaturated polyester resin (UPER). The synthesized composites were characterized through FTIR, FESEM, XRD, DSC, tensile strength tests, etc. The obtained biodegradation results indicated that significant weight loss was not observed for neat PER and PER/FNP-CAEFB nanocomposite, whereas, the UEFB/VUPER composite showed ca. 21.4% weight loss at 90 days, which was considered rationally due to the preferential degradation of the fibre.

关键词： Biodegradation Nano-Composite Nanoparticle Natural Fibre Polyester Resin

<i>In-Situ</i>Impregnation of Copper Nanoparticles on Palm Empty Fruit Bunch Powder

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Nanoparticles 2014年第3期3卷 65-71页

作者： Ridzuan Ramli Md. Maksudur Rahman Khan Rosli Mohd Yunus Huei Ruey Ong Rohaya Mohamed Halim astimar abdul aziz Zawawi Ibrahim Nahrul Hayawin Zainal Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Kuantan Malaysia Malaysian Palm Oil Board (MPOB) No. 6 Persiaran Institusi Kajang Malaysia Malaysian Palm Oil Board (MPOB) No. 6 Persiaran Institusi Kajang Malaysia Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Kuantan Malaysia

Copper nanoparticles were impregnated onto oil palm empty fruit bunch (EFB) powders via in-situ sol-gel method. The impregnation and interfacial interaction of copper nanoparticles with EFB were analysed by fourier transformed infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and atomic force microscopy (AFM). The interaction of copper nanoparticles with the surface functional groups of EFB powders was identified by FTIR analysis. The peak shift of O-H and C-O functional groups indicated the interaction between EFB and copper nanoparticles. Besides that, XRD and EDX analysis confirmed the formation of copper nanoparticles on EFB powder. Due to the copper impregnation, the crystallinity of the EFB was increased as shown by XRD. The particles size of nanoparticles was analysed via TEM and AFM where the sizes were in the range of 60 - 100 nm. These findings strongly suggest that, copper nanoparticles impregnated EFB powders can be synthesized via in- situ sol gel method.

关键词： Copper Nanoparticles In-Situ Empty Fruit Bunch Sol-Gel

Integrated ozone–photo–Fenton process for the removal of pollutant from industrial wastewater

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2017年第4期25卷 516-522页

作者： P.Asaithambi Baharak Sajjadi abdul Raman abdul aziz Department of Chemical Engineering Faculty of EngineeringUniversity of Malaya50603Malaysia

The use of hybrid advanced oxidation processes(AOPs) for the removal of pollutants from industrial effluents has been extensively studied in recent literature. The aim of this study is to compare the performance of the photo,Fenton, photo-Fenton and ozone–photo–Fenton processes in terms of color removal and chemical oxygen demand(COD) removal of distillery industrial effluent together with the associated electrical energy per order. It was observed from the experimental results that the O_3/UV/Fe^(2 +)/H_2O_2 process yielded a 100% color and95.50% COD removals with electrical energy per order of 0.015 k W·h·m^(-3) compared to all other combinations of the AOPs. The effects of various operating parameters such as H_2O_2 and Fe^(2+) concentration, effluent pH, COD concentration and UV power on the removal of color, COD and electrical energy per order for the ozone–photo–Fenton process was critically studied and reported. The color and COD removals were analyzed using a UV/Vis spectrometer and closed reflux method.

关键词： Fenton photo ozone wastewater pollutant effluent AOPs hydroxyl inorganic irradiation

Elemental characterization of black shales of Khyber Pakthunkhawa (KPK) region of Pakistan using AAS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2013年第3期32卷 248-251页

作者： abdul aziz Muhammad Sajjad Bashir Mohammad Central Analytical Facility Division Pakistan Institute of Nuclear Science and Technology Department of Construction Environment Engineering University of Science and Technology

Black shale samples were collected from Chimiari Khyber Pakthunkhawa region of Pakistan and were analyzed for elemental compositions. Atomic Absorption Spectrophotometry (AAS) was utilized for the determination of elements in the digested solutions. The analysis of black shale was performed precisely with relative standard deviation (RSD) lower than 2%. Results showed that the samples contained high concentrations of Ca (11.98 %), Al (7.09%), Fe (3.03%), Mg (0.59%) and Ti (0.58%).

关键词：原子吸收光谱法黑色页岩巴基斯坦元素组成表征相对标准偏差元素测定精确分析

Earthquake induced pounding between adjacent buildings considering soil-structure interaction

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2012年第3期11卷 343-358页

作者： Sadegh Naserkhaki Farah N.A.abdul aziz Hassan Pourmohammad Department of Civil Engineering Faculty of EngineeringUniversiti Putra Malaysia Department of Civil Engineering Faculty of EngineeringIslamic Azad University

Many closely located adjacent buildings have suffered from pounding during past earthquakes because they vibrated out of phase. Furthermore, buildings are usually constructed on soil; hence, there are interactions between the buildings and the underlying soil that should also be considered. This paper examines both the interaction between adjacent buildings due to pounding and the interaction between the buildings through the soil as they affect the buildings＇ seismic responses. The developed model consists of adjacent shear buildings resting on a discrete soil model and a linear visco- elastic contact force model that connects the buildings during pounding. The seismic responses of＇ adjacent buildings due to ground accelerations are obtained for two conditions： fixed-based （FB） and structure-soil-structure interaction （SSSI）. The results indicate that pounding worsens the buildings＇ condition because their seismic responses are amplified after pounding. Moreover, the underlying soil negatively impacts the buildings＇ seismic responses during pounding because the ratio of their seismic response under SSSI conditions with pounding to those without pounding is greater than that of the FB condition.

关键词： adjacent buildings underlying soil pounding seismic response fixed-based (FB) structure-soil-structureinteraction (SSSI)

Synthesis,Characterization,Biological and Docking Simulations of 4-(Benzylideneamino) Benzoic Acids

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2021年第3期40卷 291-300,271页

作者： HAMID aziz AAMER Saeed FARUKH Jabeen abdul Basit IRFAN Zia Qureshi abdul aziz ATIF Haroon ASHFAQ Ur Rehman Department of Chemistry Quaid-I-Azam University Islamabad 45320 Pakistan Computation ScienceResearch and Development Organization14012485 Hurontraio StreetMississaugaONCaL5A2G6 Department of Biology Laurentian University935 Ramsey Lake RoadSudburyONCanada P3E2C6 Department of Animal Sciences Quaid-I-Azam University Islamabad 45320 Pakistan Department of Microbiology Quaid-I-Azam University Islamabad 45320 Pakistan Department of Biochemistry Shankar CampusAbdul Wali Khan UniversityMardan 23200Khyber PukhtoonkhwaPakistan Department of Bioinformatics and Biostatistics Shanghai Jiaotong UniversityShanghai 200240China

The present research paper presents the synthesis, characterization, biological and computational studies of 4-(benzylideneamino) benzoic acid derivatives(3a~3g). Derivatives 3a~3c displayed best antidiabetic potential with a glucose-lowering effect compared to the reference drug Glibenclamide. Biochemical parameters including plasma glucose, serum triglycerides, cholesterol, alanine amino transferase and aspartate amino transferase levels showed significant alterations in concentrations relative to the control. Similarly, the derivatives 3a, 3d and 3e displayed potent in vitro antibacterial potential. Molecular docking simulations delineated that the ligands and complexes were stabilized at the active site by electrostatic and hydrophobic forces, consistent with the corresponding experimental results. In silico study of the binding pattern predicted that the synthesized ligands, 3d and 3a could serve as a potential surrogate for hit-to-lead generation and the design of novel antibacterial drugs.

关键词： antidiabetic biochemical cholesterol glibenclamide simulations

Mathematical modeling of contact tracing and stability analysis to inform its impact on disease outbreaks;an application to COVID-19

在线全文

学校读者我要写书评

暂无评论

Infectious Disease Modelling 2024年第2期9卷 329-353页

作者： Mohamed Ladib aziz Ouhinou abdul-aziz Yakubu University of Sultan Moulay Slimane Faculty of Sciences and TechniquesTeam of Mathematics and InteractionsBéni-MellalMorocco Howard University Dept MathWashingtonDC20059USA

We develop a mathematical model to investigate the effect of contact tracing on containing epidemic outbreaks and slowing down the spread of transmissible *** propose a discrete-time epidemic model structured by disease-age which includes general features of contact *** model is fitted to data reported for the early spread of COVID-19 in South Korea,Brazil,and *** calibrated values for the contact tracing parameters reflect the order pattern observed in its performance intensity within the three *** the fitted values,we estimate the effective reproduction number R_(e)and investigate its responses to varied control scenarios of contact *** the positivity of solutions,and a stability analysis of the disease-free equilibrium are provided.

关键词： Mathematical modeling Infectious diseases Discrete systems Disease-age structured populations Contact tracing Effective reproduction number COVID-19

Adoption of Improved Rice Varieties in the Global South:A Review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rice science 2023年第3期30卷 186-206,I0021-I0034页

作者： Julia CHECCO Fathin Ayuni azizAN Jaquie MITCHELL Ammar abdul aziz School of Agriculture and Food Sciences The University of QueenslandGatton 4343QueenslandAustralia Department of Agrotechnology Faculty of Mechanical Engineering and TechnologyUniversiti Malaysia PerlisArau 02600PerlisMalaysia

Improved rice varieties(IRVs)play a significant role in establishing food security and improving livelihood in the Global South since its introduction in the ***,the adoption of new IRVs has remained relatively *** low adoption poses a challenge to rice-producing and consuming countries as they are increasingly threatened by production shortages,malnutrition,and poor rice *** empirical studies have attempted to identify the determinants influencing the adoption of IRVs by distinguishing the characteristics between adopters and *** review showed a consensus on the important determinants influencing the adoption of IRVs in the Global *** synthesized from 99 studies suggested that variables(farm size,education,information access and farm location)examined extensively are not necessarily the most important determinants of adoption when undertaking a weighted ***,source of seed and technology-related attributes(perceived yield,maturity,ease of use,marketability and technical efficiency)are more important determinants of adoption,with determinants changing according to adoption type(probability or intensity of adoption),variety type and *** recommendations for future adoption studies include:incorporating more technology-specific variables,increasing research for overlooked regions and variety types,shifting away from predominant static analysis by capturing the dynamics of the adoption process,and considering the potential biases in *** review will facilitate the development of targeted interventions and policies that promote IRV adoption in the Global South.

关键词： technology adoption improved rice variety systematic literature review the Global South