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| 1 | Comparative performance of different urea coating materials for slow release显示文摘Approximately 70%of the applied urea fertilizer may be lost into the environment.This loss is due to leaching,decomposition and ammonium volatilization in soil,water and air.Through coating,the slow release technology can be used to reduce losses and to increase the fertilizer efficiency.Sulfur has been used as a coating material,but the coating cracks easily because of its friability,sometimes being peeled off from the urea surface.In this study,four types of materials,namely,gypsum,cement,sulfur and zeolite,were mixed and used as coating materials to search for the most effective and cheap coating materials.The primary reasons for selecting these materials were improving fruit quality and preventing plant diseases,providing a plant nutrient,increasing soil fertility and water retention.The materials were also selected based on their availability,processiblity and price.The effects of the coating materials,thickness,drying time,sieving and sealant on the crushing strength and dissolution rate of urea were investigated.Coated urea with the same proportion of gypsum-sulfur exhibited high crushing strength and lower dissolution rate.However,the performance was further enhanced by applying molten paraffin wax on the hot urea surface.SEM images demonstrated that the micro-structure of gypsum-sulfur coated urea after sieving resulted in a smoother coated layer.The efficiency of the coated urea was improved by26%using gypsum-sulfur(20%total coating),3%paraffin wax and sieving the coating materials before application. | Khairul Ridzwan Mohd Ibrahim Farahnaz Eghbali Babadi Robiah Yunus | 2014 | Particuology2014，12，6： | 6 |
| 2 | New coating formulation for the slow release of urea using a mixture of gypsum and dolomitic limestone显示文摘 | Farahnaz Eghbali Babadi Robiah Yunus Suraya Abdul Rashid Mohamad Amran Mohd Salleh Salmiaton Ali | 2015 | Particuology2015，13，6： | 6 |
| 3 | Assessing the kinetic model of hydro-distillation and chemical composition ofAquilaria malaccensis leaves essential oil显示文摘This study aimed to model the kinetic of hydro-distillation of Aquilaria malaccensis leaves oil in order to understand and optimize the extraction process. In addition, this study, for the first time, aimed to identify the chemical compositions of the A. malaccensis leave-oil. By assessing both first-order kinetic model and the model of simultaneous washing and diffusion, the result indicated that the model of simultaneous washing and diffusion better describes the hydro-distillation mechanism of the essential oil from A. malaccensis leaves.The optimum time, solid to liquid ratio, and the heating power for extracting the highest amount of essential oil were found to be around 3 h, 1:10(g·ml-1), and 300 W respectively. Yellow essential oil with a strong smell and a yield of 0.05 v/w was extracted by hydro-distillation Clevenger apparatus. Chemical compounds of the essential oil were analyzed using gas chromatography–mass spectroscopy(GC/MS), which resulted in identification of 42 compounds that constitute 93% of essential oil. Among the identified components,Pentadecanal(32.082%), 9-Octadecenal,(Z)(15.894%), and Tetradecanal(6.927%) were the major compounds.Considering the fact that all the identified major components possess pesticidal properties, A. malaccensis leaves can be regarded as a promising natural source for producing pesticides. | Mahtab Samadi Zurina Zainal Abidin Robiah Yunus Dayang Radiah Awang Biak Hiroyuki Yoshida Eng Hai Lok | 2017 | Chinese Journal of Chemical Engineering2017，25，2： | 2 |
| 4 | AA6061-T6合金搅拌摩擦焊搭接接头的腐蚀性能评价(英文)显示文摘采用氯化钠+过氧化氢溶液浸泡试验研究AA6061-T6铝合金搅拌摩擦焊搭接接头的腐蚀行为。采用循环动电位极化测试、扫描电子显微镜和能谱仪表征腐蚀形貌,揭示焊接区与基体合金的腐蚀机理。研究了焊接接头的显微组织和剪切强度。结果表明,与基体合金相比,焊接区在腐蚀溶液中会发生晶间腐蚀和点蚀。搭接剪切测试结果表明,所得焊接接头的拉伸剪切强度为128 MPa,超过基体合金强度的60%。电化学测试结果表明,焊核区和热影响区的保护电位比点蚀电位更负,说明焊核区与热影响区点蚀的趋势不强。基体合金抗腐蚀性比焊缝区的强,而热影响区的抗腐蚀性最差。点蚀主要源于金属间化合物边缘,因为与铝基体相比,金属间化合物的自腐蚀电位更高而成为阴极。由于焊缝区的金属间化合物增加,腐蚀电偶增加,焊缝的抗腐蚀性降低。 | Farhad GHARAVI Khamirul A.MATORI Robiah YUNUS Norinsan K.OTHMAN Firouz FADAEIFARD | 2016 | Transactions of Nonferrous Metals Society of China2016，26，3： | 2 |
| 5 | Preparation and characterization of trimethylolpropane esters from palm kernel oil methyl esters显示文摘 | Robiah Y A Fakhru'L-Razi OOI T L | 2003 | Journal of Oil Palm Research2003，15，2： | 1 |
| 6 | Arsenic toxicity,health hazards and removal techniques from water:an overview显示文摘 | Choong T S Y Chuah T G Robiah Y | 2007 | Desalination2007，217，： | 1 |
| 7 | Arsenic toxicity,health hazards and removal techniques from water:an overview显示文摘 | Thomas S Y Choong T G Chuah Y Robiah | | 0，，217： | 1 |
| 8 | Arsenic toxicity, health hazards and removal techniques from water: an overview显示文摘 | Thomas S.Y. Choong T.G. Chuah Y. Robiah F.L. Gregory Koay I. Azni | 2007 | Desalination2007，，1： | 1 |
| 9 | Arsenic toxicity, health hazards and removal techniques from water:an overview显示文摘 | Choong T SY Chuah T G Robiah Y | 2007 | Desalination2007，，217： | 1 |
| 10 | Arsenic toxicity,health hazards and removal techniques from water:an overview显示文摘 | Choong T S Y Chuah T G Robiah Y Gregory Koay F L Azni I | 2007 | Desalination2007，217，： | 1 |
| 11 | Effects of additives on oxidation characteristics of palm oil-based trimethylolpropane ester in hydraulics applications显示文摘 | ALIAS Nor Halaliza YUNUS Robiah IDRIS Azni | 2009 | Eur J Lipid Sci Technol2009，111，： | 1 |
| 12 | Effects of aditives on oxidation characteristics of palm oil-based trimethylol- propane ester in hydraulics applications显示文摘 | ALIAS Nor Halaliza YUNUS Robiah IDRIS Aznj | 2009 | Eur J Lipid Sci Techn- o12009，111，4： | 1 |
| 13 | Application of response surface methodology (RSM) for optimizing the palm-based pentaerythritol ester synthesis 显示文摘 | Nur Atiqah Mohamad Aziza Robiah Yunusa Umer Rashida | 2014 | Industrial Crops and Products2014，65，： | 1 |
| 14 | Arsenic toxicity,health hazards and removal techniques from water:an overview显示文摘 | CHOONG T S Y CHUAH T G ROBIAH Y | 2007 | Desalination2007，217，123： | 1 |
| 15 | Synthesis of palm oil based trimethylolpropane esters with improved pour points 显示文摘 | Robiah Yunus | 2005 | Industrial & Engineering Chemistry Research2005，44，： | 1 |
| 16 | Effects of additives on oxidation characteristics of palm oil-based trimethylolpropane ester in hydraulics applications显示文摘 | ALIAS Nor Halaliza YUNUS Robiah IDRIS Azni | 2009 | Eur J Lipid Sci Technol2009，111，： | 1 |
| 17 | Application of response surface methodology(RSM)for optimizing the palm-based pentaerythritol ester synthesis显示文摘 | Nur Atiqah Mohamad Aziz Robiah Yunusa Umer Rashid | 2014 | Industrial Crops and Products2014，62，： | 1 |
| 18 | Case studies on the perform- ance of commercial-grade lightning events counters 显示文摘 | Hartono Z A Robiah I | 2008 | EMC 19th Intel Zurich Symp2008，5，： | 1 |
| 19 | Arsenic Toxici- ty,Heath Harzard and Removal Techniques From Water: An Overview显示文摘 | Choong T S Y Ghuah T G Robiah Y | 2007 | Desalination2007，，207： | 1 |
| 20 | An overview of the emerging warm mix asphalt technology显示文摘 | Behnam Kheradmand Ratnasamy Muniandy Law Teik Hua Robiah Bt. Yunus Abbas Solouki | 2014 | International Journal of Pavement Engineering2014，，1： | 1 |
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