Journal of Physical Science最新文献_第8页

Biodiesel Synthesis through Methanolysis of Palm Olein Using Calcium Oxide Catalyst Derived from Staghorn Coral 以鹿角珊瑚为原料的氧化钙催化剂甲醇分解棕榈油合成生物柴油

IF 0.7

Journal of Physical Science Pub Date : 2020-04-25 DOI: 10.21315/jps2020.31.1.3

Nabilah Atiqah Zul, Shangeetha Ganesan, M. Hussin

{"title":"Biodiesel Synthesis through Methanolysis of Palm Olein Using Calcium Oxide Catalyst Derived from Staghorn Coral","authors":"Nabilah Atiqah Zul, Shangeetha Ganesan, M. Hussin","doi":"10.21315/jps2020.31.1.3","DOIUrl":"https://doi.org/10.21315/jps2020.31.1.3","url":null,"abstract":"This study explored the synthesis of a heterogeneous catalyst derived from staghorn coral where it was utilised to convert palm olein into methyl esters through transesterification process. The prepared catalyst was characterised by various methods, namely Hammett indicator method, benzoic acid titration method, X-ray fluorescence (XRF) spectroscopy, Brunauer-Emmett-Teller (BET)-N2 adsorption analysis, attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, thermal gravimetric analysis (TGA), X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). Based on the results acquired from ATR-FTIR and XRD analyses, it was evident that staghorn coral was converted into calcium oxide (CaO) upon thermal activation at 900°C. The impacts of catalyst loading, reaction time and methanol/oil molar ratio on biodiesel content were investigated to determine the optimum reaction conditions. The methyl esters content of 62.07% was achieved under optimised parameters comprising 6 wt% catalyst loading, reaction time of 4 h and methanol to oil molar ratio of 15:1. All in all, despite the low percentage of biodiesel production, staghorn coral has shown to be a potent catalyst and its catalytic ability could be improved to a whole new level through further modifications.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91078655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Different Prehydrolysis Processes on Lignin Extractability of Coconut Husk Fibres 不同预水解工艺对椰壳纤维木质素提取率的影响

IF 0.7

Journal of Physical Science Pub Date : 2019-12-25 DOI: 10.21315/jps2019.30.s2.18

B. Carre, M. Hébrant, N. Brosse, Nur Hanis Abd Latif, M. Hussin

引用次数: 2

The In-silico Studies of Benzylidene Indanone Derivatives Towards Dengue Virus Type-2 NS2B/NS3 Protease 针对登革病毒2型NS2B/NS3蛋白酶的苄基吲哚酮衍生物的芯片研究

IF 0.7

Journal of Physical Science Pub Date : 2019-12-25 DOI: 10.21315/jps2019.30.s2.16

Nadirah Zawani Mohd Nesfu, D. Laurain-Mattar, E. Kamarulzaman, H. Wahab, Iffah Izzati Zakaria, M. Hassan, N. Brosse, H. Osman

引用次数: 1

Preliminary Assays on Electrochemically Modulated Liquid-liquid Extraction of Metformin 电化学调制液-液萃取二甲双胍的初步研究

IF 0.7

Journal of Physical Science Pub Date : 2019-12-25 DOI: 10.21315/jps2019.30.s2.13

Maizatul Najwa Jajuli, M. Hussin, A. A. Rahim, B. Saad, M. Hébrant, Grégoire Herzog

{"title":"Preliminary Assays on Electrochemically Modulated Liquid-liquid Extraction of Metformin","authors":"Maizatul Najwa Jajuli, M. Hussin, A. A. Rahim, B. Saad, M. Hébrant, Grégoire Herzog","doi":"10.21315/jps2019.30.s2.13","DOIUrl":"https://doi.org/10.21315/jps2019.30.s2.13","url":null,"abstract":"Liquid-liquid extraction is one of the analytical methods that is commonly used for separation of various analytes. Nevertheless, the method is not capable to operate with hydrophobic medical drugs, particularly metformin where the drug is essentially used as an antidiabetic (Type II diabetes). Preliminary studies on extractions of metformin, phenyl biguanide and propranolol were accomplished using electrochemically modulated liquid-liquid extraction (EMLLE) method as a sample preparation method. The principle is based on application of electrically driving force to transfer the desired ions across the interface between two immiscible electrolyte solutions (ITIES). The extraction of three cationic drugs from artificial urine to 1, 2-dichoroethane, is controlled by external polarisation. By using ITIES cells, all of the drugs are found to transfer within the available potential window. The application of different galvani potential differences enables the selective extraction of drugs. Potential window of artificial urine shorter than lithium chloride as aqueous phase. Nevertheless, for both cases, the first drug to be extracted is propranolol which is the most hydrophobic drug and hence a lower potential is needed to transfer this cationic molecule across the interface as followed by phenylbiguanide and metformin.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78238358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treated Coal Bottom Ash for Palm Oil Mill Effluent (POME) Decolourisation 棕榈油厂废水(POME)脱色处理的煤底灰

IF 0.7

Journal of Physical Science Pub Date : 2019-11-25 DOI: 10.21315/jps2019.30.3.7

S. Saleh, Ghani Wan Azlina Wan Ab Karim, K. L. Soh

引用次数: 5

Growth of Bulk Gallium Nitride Single Crystal by Sodium Flux Method: A Brief Review 钠通量法生长大块氮化镓单晶的研究进展

IF 0.7

Journal of Physical Science Pub Date : 2019-09-15 DOI: 10.21315/jps2019.30.2.11

Nurul Fatihah Nik Sin, K. Ibrahim, N. Zainal

引用次数: 0

Experimental Investigation of Physical and Mechanical Properties of Steel Powder Filled Disc Brake Friction Materials 钢粉填充盘式制动器摩擦材料物理力学性能试验研究

IF 0.7

Journal of Physical Science Pub Date : 2019-09-15 DOI: 10.21315/jps2019.30.2.6

Pradnya Kosbe, P. Patil, M. Manickam, Gurunathan Ramamurthy, India Rane Brake Lining Ltd.

{"title":"Experimental Investigation of Physical and Mechanical Properties of Steel Powder\u0000 Filled Disc Brake Friction Materials","authors":"Pradnya Kosbe, P. Patil, M. Manickam, Gurunathan Ramamurthy, India Rane Brake Lining Ltd.","doi":"10.21315/jps2019.30.2.6","DOIUrl":"https://doi.org/10.21315/jps2019.30.2.6","url":null,"abstract":"A suitable selection of a filler material enhances the mechanical and tribological characteristics of brake friction material. There are various types of fillers like organic, inorganic, metallic and natural fibres. Among these various types, metallic fillers are very important as they consist of different functional characteristics of brake friction material. Hence in this work, four friction composites are shown with identical parent composition (65 wt%) and varying steel powder from 0 wt% to 12 wt%, and barite from 35 wt% to 23 wt%, respectively in each composition, i.e., S0, S1, S2 and S3. All these four composites are characterised for physical and mechanical properties according to Indian Standards (IS). The coefficient of friction is investigated using a pin on disc tribometer. Finally, the correlation between physical properties and coefficient of friction is determined. It is concluded that inclusion of steel powder improved almost all the physical and mechanical properties. It is also observed that density, void content and hardness influence the coefficient of friction level.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2019-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78648014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

First-principles Electronic Study of Metal-insulator Transition in the Rutile CrO2 at Room Temperature 室温下金红石CrO2金属-绝缘体转变的第一性原理电子研究

IF 0.7

Journal of Physical Science Pub Date : 2019-09-15 DOI: 10.21315/jps2019.30.2.2

S. Biswas

{"title":"First-principles Electronic Study of Metal-insulator Transition in the Rutile CrO2\u0000 at Room Temperature","authors":"S. Biswas","doi":"10.21315/jps2019.30.2.2","DOIUrl":"https://doi.org/10.21315/jps2019.30.2.2","url":null,"abstract":"First-principles electronic structure calculations were employed for the electronic, magnetic and structural properties of rutile CrO2. This material is a ferromagnetic half-metal with a semiconducting gap of 1.85 eV. The sharing of a single electron by Cr-3dyz and dxz orbitals is responsible for the metallic behaviour of CrO2 for the majority spin channel. For the application of on-site Coulomb interaction U up to 4 eV, the electrons in the valence band polarise towards the Fermi level (EF), while the electrons in the conduction band polarise away from EF. The enhanced shifting of conduction bands of the spin minority channel is responsible for the augmentation of the semiconducting spin gap. This system undergoes a metal-insulator transition (MIT) upon the application of U = 5 eV. Due to the presence of electron correlation, the electron in the dxy orbital shifts well below EF, while bonding components of dyz and dxz orbitals are occupied by the remaining single electron. Nevertheless, anti-bonding components of these two states remain unoccupied. Consequently, a band gap of Eg ~ 0.2 eV is opened near EF. The double exchange interactions between the partially occupied Cr-t2g states and p-d hybridisations are responsible for the ferromagnetic behaviour of CrO2 in both halfmetallic and insulating phases.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2019-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91209358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterisation and Kinetic Studies on Activated Carbon Derived from Rubber Seed Shell for the Removal of Methylene Blue in Aqueous Solutions 橡胶籽壳活性炭去除水溶液中亚甲基蓝的表征及动力学研究

IF 0.7

Journal of Physical Science Pub Date : 2019-09-15 DOI: 10.21315/jps2019.30.2.1

Nur Fatin Silmi Mohd Azani, Caryn Tan Hui Chuin, N. Abdullah, S. Sharifuddin, M. Hussin

{"title":"Characterisation and Kinetic Studies on Activated Carbon Derived from Rubber Seed\u0000 Shell for the Removal of Methylene Blue in Aqueous Solutions","authors":"Nur Fatin Silmi Mohd Azani, Caryn Tan Hui Chuin, N. Abdullah, S. Sharifuddin, M. Hussin","doi":"10.21315/jps2019.30.2.1","DOIUrl":"https://doi.org/10.21315/jps2019.30.2.1","url":null,"abstract":"The aim of this research is to investigate and identify the absorption capacity of activated carbon derived from a rubber seed shell (RSS). An RSS was prepared through the conduction of a chemical activation process primarily using potassium hydroxide at a ratio of 1:1 followed by carbonisation at 400°C with N2 under a steady flow rate of 1 ml min–1 for 3 h. The produced RSS activated carbon (RSSAC) was characterised using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopyenergy dispersive X-ray (SEM-EDX) spectroscopy, Brunauer-Emmet-Teller (BET) analysis and thermogravimetric analysis (TGA). The SEM image obtained revealed the presence of a highly porous RSSAC surface, with an average pore diameter of 3.35 nm, indicating a mesoporous structure. EDX analysis depicted that C and K were major elements found in RSSAC with a compound percentage of 99.73% and 0.27%, respectively. Batch adsorption studies were conducted to investigate the adsorption properties of RSSAC towards the removal of methylene blue (MB) dye. The optimum dosage of RSSAC was determined to be 5.0 g per 100 ml. Effect of contact time revealed that the highest percentage removal of MB (99.62%) by RSSAC was obtained at a concentration of 100 mg l–1 during a time period of 1 h. In comparison, the effect of pH study affirmed that RSSAC achieved an average removal of 99% of MB in both acidic and basic media at 100 mg l–1. Kinetic studies revealed that the adsorption process abides by the pseudosecond-order kinetic model. Based on the findings by utilising multiple approaches Activated Carbon from Rubber Seed 2 as mentioned, it can be proposed that RSSAC is a viable alternative to act as a green alternative adsorbent.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2019-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76855657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

3D Printing Filaments Prepared from Modified Poly(Lactic Acid)/Teak Wood Flour Composites: An Investigation on the Particle Size Effects and Silane Coupling Agent Compatibilisation 改性聚乳酸/柚木粉复合材料制备3D打印长丝:粒径效应及硅烷偶联剂增容研究

IF 0.7

Journal of Physical Science Pub Date : 2019-09-15 DOI: 10.21315/jps2019.30.2.10

N. Petchwattana, W. Channuan, P. Naknaen, B. Narupai

{"title":"3D Printing Filaments Prepared from Modified Poly(Lactic Acid)/Teak Wood Flour\u0000 Composites: An Investigation on the Particle Size Effects and Silane Coupling Agent\u0000 Compatibilisation","authors":"N. Petchwattana, W. Channuan, P. Naknaen, B. Narupai","doi":"10.21315/jps2019.30.2.10","DOIUrl":"https://doi.org/10.21315/jps2019.30.2.10","url":null,"abstract":"This study aims to produce the poly(lactic acid) (PLA)/teak wood composite filament for 3D printing application. Prior to the production of the wood plastic composite (WPC) filaments, PLA was modified to remedy the problem of brittleness and low-melt viscosity by core-shell rubber (CSR) particles and acrylic processing aid (APA). Two different particle sizes of teak wood flour (WF) were added to the modified-PLA (mPLA). Silane coupling agent was further added to improve the interfacial adhesion between the hydrophilic WF and hydrophobic mPLA matrix. Experimental results indicated that all formulations could be fabricated as 3D printing filaments. However, the filaments were successfully printed only for the mPLA with 74 μm WF. For 125 μm, the printer nozzle was clogged up with the agglomerated WF. WPC filaments had higher water uptake than those mPLA and neat PLA, but it significantly decreased with the silane compatibilisation. SEM result also confirmed the improvement of the interfacial bonding between mPLA and WF, which facilitated better fibre-matrix stress transfer and improved the overall mechanical strength.","PeriodicalId":16757,"journal":{"name":"Journal of Physical Science","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2019-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82170617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32