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2014

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The Effectiveness Of Input And Output In Vocabulary Acquisition Among Primary Esl Learners / Mellisa Chin Lee Lee, Mellisa Lee Lee Chin Jan 2014

The Effectiveness Of Input And Output In Vocabulary Acquisition Among Primary Esl Learners / Mellisa Chin Lee Lee, Mellisa Lee Lee Chin

Student Works (2010-2019)

The role of input and output in interaction has always been seen as an entirety in the language-learning domain. Driven by three distinctive frameworks, earlier works suggested that the Interaction Hypothesis facilitates the Input Hypothesis and the Output Hypothesis in language development. This experimental study was designed to investigate the effects of pre-modified input, negotiated interaction and output in L2 vocabulary comprehension and acquisition. A sample of 45 primary school ESL learners with similar L1 background was divided into three groups (GPIO–premodified input, GINW–negotiated input without output, GINP–negotiated input with output). Each group learned the target vocabulary items with pictures …

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A Semantic Analysis Of Conjunctions In The Translation Of Badai Semalam Into English / Nur Farhana Nasri, Nur Farhana Nasri Jan 2014

A Semantic Analysis Of Conjunctions In The Translation Of Badai Semalam Into English / Nur Farhana Nasri, Nur Farhana Nasri

Student Works (2010-2019)

The purpose of this study is to analyze the semantic analysis of conjunctions in the translation of a Malay-English novel. This study focuses on looking at cohesion ties specifically conjunctions used in the selected Malay literary text, Badai Semalam and its English translated version, Storms of Yesterday. The objectives of this study are (i) to identify the types of conjunctions used in sentences in translating the Malay novel, Badai Semalam into the English novel, Storms of Yesterday (ii) to find out the similarities and differences of semantic features of the Malay conjunctions into the English translation (iii) to determine the …

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The Effect Of Green Tea (Camellia Sinensis) On Lactic Acid Fermentation Of Milk : Effects On Physical, Nutritional And Functional Properties Of Yogurt / Shabboo Amirdivani, Shabboo Amirdivani Jan 2014

The Effect Of Green Tea (Camellia Sinensis) On Lactic Acid Fermentation Of Milk : Effects On Physical, Nutritional And Functional Properties Of Yogurt / Shabboo Amirdivani, Shabboo Amirdivani

Student Works (2010-2019)

Yogurt is a healthy food and it has become good candidate for fortification with many healthful ingredients including fruits, herbs, prebiotics, probiotics and omega-3 fatty acids. Whatever the fortification strategies, it is essential that the finished product retain a desirable taste, becomes more nutritious and has long shelf life. The present study investigated the benefits green tea would bring to increase yogurt properties by virtue of the high levels of flavonoids which can protect cells and tissues from oxidative damage by scavenging oxygen-free radicals. The presence of green tea would however affect yogurt bacteria fermentation of milk and subsequently the …

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Automated Landmarks Detection On 3d Human Facial Image / Ngo Chee Guan, Chee Guan Ngo Jan 2014

Automated Landmarks Detection On 3d Human Facial Image / Ngo Chee Guan, Chee Guan Ngo

Student Works (2010-2019)

One of the methods of craniofacial anthropometry is indirect anthropometry. A measurement performs on digital facial images or x-ray images. In order to get this measurement, few definable points on structures in individual facial image are needed and mark as landmark points. Currently, most of the work in anthropometric studies uses landmark points that are manually marked on 3D facial image by examiner. This method leads to time consuming and human bias, which will vary within intra-examiner himself and among inter-examiners when involve large data sets. Biased judgment as well leads to a wider gap in measurement error. Thus, this …

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The Development Of Peptide-Based Vaccine For Leptospirosis: In Silico Approach / Salwana Binti Othman, Salwana Othman Jan 2014

The Development Of Peptide-Based Vaccine For Leptospirosis: In Silico Approach / Salwana Binti Othman, Salwana Othman

Student Works (2010-2019)

Leptospirosis is a worldwide zoonosis infection caused by Gram-negative bacteria from the genus of Leptospira. Eight pathogenic species of Leptospira have been identified and there are more than 250 serovars that can cause leptospirosis to human and animals. Due to the indistinguishable symptoms of the disease, leptospirosis is often misdiagnosed, resulting to death if antibiotic treatment is not given immediately. Prophylactic vaccine can reduce the mortality rate resulting from the late treatment. However, the existing vaccines for leptospirosis are serovar-specific and can only provide limited protection to human. Therefore, a new and more effective vaccine is urgently needed. The vaccine …

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Molecular Characterization Of Est Microsatellites And Analysis Of Population Genetic Structure In Striped Snakehead Fish, Channa Striata / Sara Takalloo, Sara Takalloo Jan 2014

Molecular Characterization Of Est Microsatellites And Analysis Of Population Genetic Structure In Striped Snakehead Fish, Channa Striata / Sara Takalloo, Sara Takalloo

Student Works (2010-2019)

The Striped snakehead fish, Channa striata is a freshwater air breathing fish species indigenous to Malaysia. It is locally known in Malaysia as Haruan. Channa striata is economically playing a major role in the aquaculture and fisheries industries. Channa striata is important especially as a food source in South East Asia. It has been broadly used for medical and pharmaceutical purposes due to its therapeutic and recuperative qualities. Among the many DNA marker systems available, EST microsatellites have a number of advantages due to its high level of transferability, high reproducibility, codominant inheritance and low cost for development compared to …

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The Effect Of Cinnamomum Cassia On Two Breast Cancer Cell Lines / Sima Kianpour Rad, Sima Kianpour Rad Jan 2014

The Effect Of Cinnamomum Cassia On Two Breast Cancer Cell Lines / Sima Kianpour Rad, Sima Kianpour Rad

Student Works (2010-2019)

The bark of the cinnamon tree (Cinnamomum cassia) is a popular culinary spice. It is also used in traditional medicine to maintain health and prevent disease. The antioxidant and anticancer activity of C. cassia was investigated using various assays. C. cassia bark was sequentially extracted with seven solvents of varying polarity. The acetone extract of C. cassia, at 30 μg/ml, protected the mouse fibroblast cell line, 3T3-L1, from DNA damage by 45 %, as estimated by the comet assay. The acetone extract had the highest total phenolic and flavonoid content. The hexane extract of C. cassia and the two main …

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Development Of Seating Pressure Ulcer Prevention Training System For Individual With Spinal Cord Injury / Hartini Hazmi, Hazmi Hartini Jan 2014

Development Of Seating Pressure Ulcer Prevention Training System For Individual With Spinal Cord Injury / Hartini Hazmi, Hazmi Hartini

Student Works (2010-2019)

Pressure ulcer is a serious problem and complication for spinal cord injury (SCI) patients. There are various methods to prevent pressure ulcer which are good quality of cushion and perform pressure relief activity. This study aims to develop a device that can give alert to patients especially SCI to perform pressure relief activity such as push up. Patients need to have the capability and strength at upper body to perform this activity. The design consists of two elements to make the system successful which are sensor and control system. Light dependent resistor (LDR) was used as sensing element to trigger …

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Neural Response Based Speaker Identification Under Noisy Condition / Leyla Roohisefat, Roohisefat Leyla Jan 2014

Neural Response Based Speaker Identification Under Noisy Condition / Leyla Roohisefat, Roohisefat Leyla

Student Works (2010-2019)

Speaker identification is the mechanism of determining a person among a set of speakers to certify whether that person is who he claims to be. The available speaker identification systems are mostly based on the acoustical signal itself. The problem is that they are very sensitive to noise and can work only at very high signal-to-noise ratio (SNR). However, neural responses are very robust against background noise. In this study, a wellknown model of the auditory periphery by Zilany and colleagues (J. Acous. Soc. Am., 2009) is employed to simulate the neural responses, known as neurogram, on identifying a speaker, …

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Finite State Machine And Eog Artifacts In Eeg Signals For Wheelchair Navigation / Roziana Ramli, Ramli Roziana Jan 2014

Finite State Machine And Eog Artifacts In Eeg Signals For Wheelchair Navigation / Roziana Ramli, Ramli Roziana

Student Works (2010-2019)

Supporting physically disabled society with severe motor disabilities is very challenging as their needs differ depending on the severity of the impairment incurred. As an attempt to support them, a BCI for wheelchair navigation is developed to help them regain some mobility. In this study, a hybrid BCI that combine inputs from EEG and EOG signals for a more effective interface is proposed. Specifically, one EEG signal at O2 and two EOG artifacts embedded in EEG signals at C3 and C4 are used as inputs to an asynchronous wheelchair navigation system. Cz is taken as reference and the signals are …

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Semantic Query Translation For Quran Content Retrieval / Mohd Amin Mohd Yunus, Mohd Yunus Mohd Amin Jan 2014

Semantic Query Translation For Quran Content Retrieval / Mohd Amin Mohd Yunus, Mohd Yunus Mohd Amin

Student Works (2010-2019)

Existing Quran retrieval system suffers from low precision and recall mainly due to the query technique used particularly in cross language retrieval (CLIR). As query technique is one of the indicator for Quran retrieval information performance in CLIR, in order to improve the retrieval, query technique could be enhanced using combination of semantic, stemming and translation techniques. The main purpose of the study is to automate the retrieval process of Quranic verses across multilingual context (Malay, English, Arabic). The specific objectives of the study are i) to develop algorithm of query expansion based on stemming, semantic and translation query in …

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Mindfulness In Organizations, Jochen Reb, Ellen Choi Jan 2014

Mindfulness In Organizations, Jochen Reb, Ellen Choi

Research Collection Lee Kong Chian School Of Business

This chapter discusses the practice of mindfulness in organizations. In the first section we describe the growing interest in mindfulness training among organizations and discuss possible reasons for this development. We then review work on the definition and concept of mindfulness as they have been developed in psychology and organizational scholarship. In the second section, we discuss different forms of mindfulness practice in organizations, including Mindfulness-Based Stress Reduction (MBSR) as the most prominent. The third section reviews empirical evidence on the effects of mindfulness on work-related outcomes and processes such as employee performance, employee well-being, leadership, and ethical decision making. …

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Foreign Direct Investment Into Crude Oil Exploitation And Its Impact On The Economic Growth And Environment: Case Study Of Niger Delta Oil Producing Communities / Salami Dada Kareem, Salami Dada Kareem Jan 2014

Foreign Direct Investment Into Crude Oil Exploitation And Its Impact On The Economic Growth And Environment: Case Study Of Niger Delta Oil Producing Communities / Salami Dada Kareem, Salami Dada Kareem

Student Works (2010-2019)

In spite of the general perception of the debilitating impact of exploitation of crude oil on the economic growth and the environment of a country, from a conceptual viewpoint, evidence of lack of clarity on the solution to the problem of over-exploitation of crude oil in the Niger Delta region of Nigeria abounds. A body of research has consistently pointed out the numerous negative externalities brought to bear on the environment by the oil companies in the region. There is no consensus on the best way to solve the problem of externalities in the Nigerian oil industries. It is important …

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Static Hand Gesture Recognition Using Artificial Neural Network / Haitham Sabah Hasan, Haitham Sabah Hasan Jan 2014

Static Hand Gesture Recognition Using Artificial Neural Network / Haitham Sabah Hasan, Haitham Sabah Hasan

Student Works (2010-2019)

The goal of static hand gesture recognition is to classify the given hand gesture data represented by some features into some predefined finite number of gesture classes. The main objective of this effort is to explore the utility of two feature extraction methods, namely, hand contour and complex moments to solve the hand gesture recognition problem by identifying the primary advantages and disadvantages of each method. Artificial neural network is built for the purpose of classification by using the back- propagation learning algorithm. The proposed system presents a recognition algorithm to recognize a set of six specific static hand gestures, …

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Abnormal Event Detection In Video Surveillance / Lim Mei Kuan, Mei Kuan Lim Jan 2014

Abnormal Event Detection In Video Surveillance / Lim Mei Kuan, Mei Kuan Lim

Student Works (2010-2019)

The recent Boston Marathon bombing and the kidnap of a British boy at Lake Titiwangsa, have ignited a pressing interest for automated video content analysis to assist the law enforcement in preventing such events from recurring. Post-mortem investigations surrounding such cases often found that there were missed opportunities for using technology to detect the abnormality of the suspects, which lead to those tragedies. Therefore, this thesis aims to develop computer vision solutions to identify regions or behaviours, which could lead to unfavourable events, as a cue to direct the attention of security personnel for a more effective and proactive video …

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Exploring The Diversity Of Butterflies (Lepidoptera) At Different Elevations In Genting Highlands And The Validity Of Graphium Species In Peninsular Malaysia / Karen Chia Huey Min, Karen Huey Min Chia Jan 2014

Exploring The Diversity Of Butterflies (Lepidoptera) At Different Elevations In Genting Highlands And The Validity Of Graphium Species In Peninsular Malaysia / Karen Chia Huey Min, Karen Huey Min Chia

Student Works (2010-2019)

Butterflies play an ecological role as pollinators, prey, defoliators and herbivores. They are in abundant and diverse in many ecosystems. However, they are serves as indicators of ecosystem change and predict environmental alternation. This study was conducted to (1) compare the attractiveness of ten types of fruit bait and make recommendations on the most efficient fruit bait types for trapping butterflies in the South East Asian tropical forest; (2) investigate how butterfly diversity is related to elevation at Genting Highlands in Peninsular Malaysia; and (3) explore the phylogenetic relationships within Graphium and the validity of Pathysa. The bait trap is …

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Application Of Newly Synthesized Titanium (Iv) Butoxide-Cyanopropyltriethoxysilane Sorbent For The Extraction Of Aromatic Amines In Water Samples / Mazidatulakmam Binti Miskam, Mazidatulakmam Miskam Jan 2014

Application Of Newly Synthesized Titanium (Iv) Butoxide-Cyanopropyltriethoxysilane Sorbent For The Extraction Of Aromatic Amines In Water Samples / Mazidatulakmam Binti Miskam, Mazidatulakmam Miskam

Student Works (2010-2019)

A new titanium (IV) butoxide-cyanopropyltriethoxysilane (Ti-CNPrTEOS) hybrid material was successfully synthesized as sorbent for the extraction of polar aromatic amines. The sorbent was synthesized by hydrolysis and condensation of titanium (IV) butoxide and cyanopropyltriethoxysilane with the presence of hydrochloric acid as catalyst via sol-gel method. Under the optimum synthesis conditions (tetrahydrofuran as solvent, 1.2 M of hydrochloric acid catalyst, 4 mol of water content with ratio of titanium (IV) butoxide and cyanopropylteriethoxysilane of 1:1 and aging temperature of 60°C), the sorbents were characterized by Fourier Transform-Infrared, Field-Emission Scanning Electron Microscopy-Energy, CHN elemental analysis, Brunauer–Emmett–Teller (BET) desorption and thermogravimetric analysis. A …

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Determination Of Lead In Wax Crayon Using Flame Atomic Absorption Spectrometry / Suhailey Binti Mohd Noor, Suhailey Mohd Noor Jan 2014

Determination Of Lead In Wax Crayon Using Flame Atomic Absorption Spectrometry / Suhailey Binti Mohd Noor, Suhailey Mohd Noor

Student Works (2010-2019)

The method for the determination of lead in wax crayon by Flame Atomic Absorption Spectrometry was adopted from Health Canada Safety Program (HCSP), Product Safety Laboratory, ‘Determination of Total Lead in Wax Crayon by Closed Vessel Micowave Digestion’ and verified. The parameter of method verification such as accuracy, precision, limit of detection, limit of quantitation and linearity were studied. Three colours from 10 boxes of wax crayon samples were analysed. Microwave digestion method was used to extract the lead prior to analysis. The concentration of lead in red, blue and orange colour wax crayon was 25.23 ± 3.26 mg kg-1, …

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Copper(Ii) Carboxylate-Cyclam Complexes As Thermally Stable Magnetic Materials / Nur Syamimi Ahmad Tajidi, Ahmad Tajidi Nur Syamimi Jan 2014

Copper(Ii) Carboxylate-Cyclam Complexes As Thermally Stable Magnetic Materials / Nur Syamimi Ahmad Tajidi, Ahmad Tajidi Nur Syamimi

Student Works (2010-2019)

The objective of this research was to study the correlation between structure and physical properties of copper(II)-cyclam-alkylcarboxylate complexes, and the electronic effect of a substituent on the aromatic ring of copper(II)-cyclam-arylcarboxylate complexes. The alkylcarboxylate ligands were CnH2n+1COO (n = 6, 7, 9, 11, 13, 15) and CH3(CH2)7CH((CH2)5CH3), while the arylcarboxylate ligands were p-XC6H4COO (X = NH2, OH, OCH3, CH3, C≡N, H) and C6F5COO.

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Seasonality And Diversity Of Culturable Vibrions In Tropical Coastal Waters / Mayuree A/P S.Vijayan, Mayuree S.Vijayan Jan 2014

Seasonality And Diversity Of Culturable Vibrions In Tropical Coastal Waters / Mayuree A/P S.Vijayan, Mayuree S.Vijayan

Student Works (2010-2019)

No abstract provided.

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The Community Structure Of Forensically Important Flies And Beetles On An Altitudinal Gradient On Gunung Ulu Kali, Peninsular Malaysia / Thary Bin Gazi, Thary Gazi Jan 2014

The Community Structure Of Forensically Important Flies And Beetles On An Altitudinal Gradient On Gunung Ulu Kali, Peninsular Malaysia / Thary Bin Gazi, Thary Gazi

Student Works (2010-2019)

While present in crime scenes and succession studies, little is known about the ecology and taxonomy of forensically important necrophagus beetles. Natural gradients such as mountains were used to determine how certain groups of animals react to changes in the environment. A survey of forensically important beetles was conducted along an altitudinal gradient on Gunung Ulu Kali using pitfall trapping. The corresponding diversity of blowflies was collected in the same site. Thirty three species of beetles were recorded, with the highest species richness found in the lowland forest at 200m. The beetle and fly communities above 1000m height had less …

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Determination Of Simazine In Fish And Shrimp Samples Using Ultra Performance Liquid Chromatography Tandem Mass Spectrometer (Uplc-Ms/Ms) / Amirul Ashraf Bin Jamaluddin, Jamaluddin Amirul Ashraf Jan 2014

Determination Of Simazine In Fish And Shrimp Samples Using Ultra Performance Liquid Chromatography Tandem Mass Spectrometer (Uplc-Ms/Ms) / Amirul Ashraf Bin Jamaluddin, Jamaluddin Amirul Ashraf

Student Works (2010-2019)

Ultra performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method was successfully developed and validated for the analysis of simazine in fish and shrimp samples at trace levels to meet European Union requirements and import requirements from certain countries. This method also utilized a simple, fast and inexpensive extraction technique called QuECheRS (quick, easy, cheap, rugged and safe). Matrix-matched calibration standard are used to construct a calibration curve and Ethoprophos is used as internal standard. At optimal conditions, the chromatographic separation was achieved in less than 10 minutes with the total run time of 13.5 minutes. The mean recoveries for fish …

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Archaea Diversity In The Coastal Waters Of West Peninsular Malaysia / Saw Suet Yit, Suet Yit Saw Jan 2014

Archaea Diversity In The Coastal Waters Of West Peninsular Malaysia / Saw Suet Yit, Suet Yit Saw

Student Works (2010-2019)

In this study, we explored the archaea diversity in four locations (Kuala Selangor, Port Klang, Port Dickson, Sungai Muar) along the Straits of Malacca using the cloning method. Four 16S rDNA clone libraries were constructed with archaea specific primers (Arc21F and Arc958R), and in total, 1074 randomly selected clones were screened by PCR-restriction fragment length polymorphism (PCR-RFLP) analysis using three different restriction enzymes (RsaI, CfoI, and DdeI). Majority of the sequences from three clone libraries were affiliated to Euryarchaeota whereas one clone library (Kuala Selangor) was dominated by Thaumarchaeota sequences. Phylogenetic analysis of 16S rDNA sequences showed high archaea diversity …

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Synthesis Of Palm-Based Zinc Soaps For Compounding In Rubber Products / Chua Wei Keong, Wei Keong Chua Jan 2014

Synthesis Of Palm-Based Zinc Soaps For Compounding In Rubber Products / Chua Wei Keong, Wei Keong Chua

Student Works (2010-2019)

The melting point is the main factor in which metallic soap is to use as additives for the rubber manufacturing. This rubber compounder is the making stock for transfer moulding, compression, extruded profiles or hoses, the curing temperature or moulding and the duration will limit to the materials to be embedded on the surface of the compound. Zinc stearate has the lowest melting point as compared to other metallic soap. Although it has a low melting point, but it still consider high and problematic to the compounding system. The main objective in this study is to synthesis a various zinc …

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On The Skewness Of Graphs / Sim Kai An, Kai An Sim Jan 2014

On The Skewness Of Graphs / Sim Kai An, Kai An Sim

Student Works (2010-2019)

Let G be a graph. The crossing number of G, denoted as cr(G), is the minimum number of crossings of its edges among all drawings of G in the plane. The skewness of a graph G, denoted as sk(G), is the minimum number of edges in G whose deletion results in a planar graph. In Chapter 1 of this thesis, some preliminaries and de�nitions concerning graphs are given. In Chapter 2, we present some known results on crossing numbers of graphs and also a planarity criterion for a graph. In Chapter 3, we provide a survey on skewness of graphs …

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Fish And Trophic Connectivity Across Coral Reef And Mangrove Habitats Of North Eastern Langkawi Island, Peninsular Malaysia / Lau Chai Ming, Chai Ming Lau Jan 2014

Fish And Trophic Connectivity Across Coral Reef And Mangrove Habitats Of North Eastern Langkawi Island, Peninsular Malaysia / Lau Chai Ming, Chai Ming Lau

Student Works (2010-2019)

The presence of disparate biotopes of coral reefs and mangroves in one general area is unique. These biotopes may form ecologically connected ecosystems when occurring in close proximity such as in tropical Langkawi Island, Malaysia. Connected marine biotopes can provide various ecological services to fish community such as nursery, feeding habitats and shelter. As such, this study aims to test two hypotheses regarding Langkawi’s coral reefs and mangroves 1) the biotopes are ecologically connected via habitat utilization by the fish fauna and 2) the biotopes are ecologically connected via trophic energy pathways. Gill nets and fish pots were deployed to …

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Fraud Detection In Telecommunication Using Pattern Recognition Method / Mohd Izhan Mohd Yusoff, Mohd Izhan Mohd Yusoff Jan 2014

Fraud Detection In Telecommunication Using Pattern Recognition Method / Mohd Izhan Mohd Yusoff, Mohd Izhan Mohd Yusoff

Student Works (2010-2019)

Fraud activities have reached to critical point causing millions of ringgit of losses to telecommunication companies, and as a result, forcing them to employ applications or systems (such as Telekom Malaysia Berhad’s Next Generation Fraud Detection System) to detect the said activities. We introduce a new algorithm that could detect fraud activities in telecommunication industry (e.g. intrusion fraud which occurs when legitimate account is comprised by an intruder who makes or sells calls on this account) that uses Gaussian Mixed Model (or GMM), a probabilistic model normally used in fraud detection via speech recognition. Due to the complexity of GMM, …

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Metallothionein Gene Expression And Genotoxic Effects Of Heavy Metals On Oreochromis Sp. / Elani Laili Juhari, Juhari Elani Laili Jan 2014

Metallothionein Gene Expression And Genotoxic Effects Of Heavy Metals On Oreochromis Sp. / Elani Laili Juhari, Juhari Elani Laili

Student Works (2010-2019)

Metallothionein is a small, cysteine rich protein that aids in ion homeostasis in a cell. It binds naturally to zinc and also has the tendency to bind to other metals as well if present in the cell. This study was conducted in order to determine the effects of heavy metals exposure on metallothionein expression and other genotoxic effects on the tilapia fish as test subjects. Oreochromis sp. was chosen as the test subject because of the many advantages of its characteristics and it can be easily found in Malaysian rivers. Test subjects were exposed to two types of metals which …

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Modelling And Computer Simulation Studies Of Sugar Based Amphiphilic Systems / Sara Ahmadi, Sara Ahmadi Jan 2014

Modelling And Computer Simulation Studies Of Sugar Based Amphiphilic Systems / Sara Ahmadi, Sara Ahmadi

Student Works (2010-2019)

Nowadays, sugar-based amphiphiles are among the most attractive class of compounds to be studied both fundamentally and application-wise. They are one of the main components in cell membranes and play important role in many biological functions. Therefore, understanding the nature of the different liquid crystal phases of these materials is important and conceivable using different experimental techniques, theory and simulation. This thesis focuses on the last two methods to investigate the properties of these highly interesting soft materials. We begin by examining a set of novel glycolipids which has been modified to include crown ethers attached to the sugar ring …

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The Role Of Hydrogen Bonding By Protic Ionic Liquid In Driving Phase Separation Or Phase Miscibility In Ucst-Type Phase Ternary Mixture / Wan Melissa Diyana Binti Wan Normazlan, Wan Normazlan Wan Melissa Diyana Jan 2014

The Role Of Hydrogen Bonding By Protic Ionic Liquid In Driving Phase Separation Or Phase Miscibility In Ucst-Type Phase Ternary Mixture / Wan Melissa Diyana Binti Wan Normazlan, Wan Normazlan Wan Melissa Diyana

Student Works (2010-2019)

Extracting organic solvent from water are always become an interest in relevance industry. Liquid-liquid equilibria is one common type of separation process that is widely used industrially. In this study, two new protic ionic liquids i.e. bis-(2-ethylhexyl)ammonium tosylate and tris-(2-ethylhexyl)ammonium tosylate were synthesized and characterized to be used as an extractor to separate azeotropic mixture of water and isopropanol. The miscibility of protic ionic liquids with water and isopropanol generally increases upon heating, and both systems undergo an upper critical solution temperature (UCST) type phase transition. Minor changes on temperature were the parameter to control the phase separation. In order …

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