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2012

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Explaining Recreationist Responsible Behaviour : A Case Of Scuba Diving / Ong Tah Fat, Tah Fat Ong Jan 2012

Explaining Recreationist Responsible Behaviour : A Case Of Scuba Diving / Ong Tah Fat, Tah Fat Ong

Student Works (2010-2019)

The use of Grid and Cloud Computing for resource sharing has received tremendous attention in recent years. The merging of virtualization, utility computing and distributed computing with Service Oriented Architecture (SOA) has provided greater flexibility and ushered in a new paradigm of on-demand services. However, job scheduling remains a formidable challenge due to the dynamic and heterogeneous nature of Grid and Cloud Computing. Furthermore, the increasing and diverse end users requests raise new and greater urgencies to resolve the provisioning of Quality of Service (QoS). This thesis proposes a Hybrid Scheduling Algorithm (HSA) with automatic deployment mechanism that maximizes resources …

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Identification Of Changes In The Serum Proteome Of Spontaneously Hypertensive Rats (Shr) Following Administration Of Aqueous Extracts From Ficus Deltoidea / Nur Atiqah Haizum Abdullah, Abdullah Nur Atiqah Haizum Jan 2012

Identification Of Changes In The Serum Proteome Of Spontaneously Hypertensive Rats (Shr) Following Administration Of Aqueous Extracts From Ficus Deltoidea / Nur Atiqah Haizum Abdullah, Abdullah Nur Atiqah Haizum

Student Works (2010-2019)

Ficus deltoidea or better known as Mas Cotek is an herbaceous plant found around the coast of Peninsular Malaysia especially in Terengganu and Kelantan. This plant is believed to have the capability in helping treat or controlling diseases including hypertension. Hypertension is a major disease that affects by many people all over the world. It is one of the main diseases that contribute to high rate of mortality. Even though modern medicine have been used to treat hypertension, some people still believe that traditional medicinal practices such as taking natural products along with healthy lifestyle will significantly improve hypertension. In …

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Penggunaan Pujian Dalam Bahasa Cina Oleh Guru Wanita Dan Lelaki / Teoh Huoi She, Huoi She Teoh Jan 2012

Penggunaan Pujian Dalam Bahasa Cina Oleh Guru Wanita Dan Lelaki / Teoh Huoi She, Huoi She Teoh

Student Works (2010-2019)

This purpose of this study is to examine compliment among secondary school teachers in Chinese language. Therefore, this study tends to explore the common realizations of compliments in Chinese language which used by female and male teachers in the classroom. In addition, this study also to explore lexical and syntactic patterns of Chinese compliments. The data of the present study are based on the conversation in the classroom which has been recorded and transcribed. Jefferson Transcription System (1978) adapted and modified to analyze the conversation in Chinese language. The study was obtained on the analytical framework established by Ye (1995) …

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Biodiversity And Epidemiology Study Of Macroparasites From Stray Cats In Peninsular Malaysia / Norhidayu Binti Sahimin, Sahimin Norhidayu Jan 2012

Biodiversity And Epidemiology Study Of Macroparasites From Stray Cats In Peninsular Malaysia / Norhidayu Binti Sahimin, Sahimin Norhidayu

Student Works (2010-2019)

The occurrences of macroparasites from 543 stray cats were studied in four urban cities from west (Kuala Lumpur), east (Kuantan), north (Georgetown) and south (Malacca) of Peninsular Malaysia between May 2007 to August 2010. The hosts were infested with a minimum of one species and a maximum of six species of macroparasites. Of all four locations, Georgetown had the highest species diversity followed by Malacca, Kuala Lumpur and Kuantan. Five ectoparasites species were recovered namely, Ctenocephalides felis, Felicola subrostratus, Haemaphysalis bispinosa, Heterodoxus spiniger and Lynxacarus radovskyi. This study also recorded the dog louse, Heterodoxus spiniger for the first time in …

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Comparative Study Of Bioethanol Production From Rotten Grape And Apple Fruits As Renewable Energy And Waste Management / Norah Hammad Alhawiti, Norah Hammad Alhawiti Jan 2012

Comparative Study Of Bioethanol Production From Rotten Grape And Apple Fruits As Renewable Energy And Waste Management / Norah Hammad Alhawiti, Norah Hammad Alhawiti

Student Works (2010-2019)

Biomass of various sources such as those of cellulosic and hemicellulosic contents were proven to produced bioethanol. This study focused on the production of bioethanol from waste fruits of grapes and apples using yeast Saccharomyces cerevisiae, which is viewed as a mean of reducing environmental pollution. High bioethanol production was obtained using yeast loading of 4 g/L at 32°C after 3 days of fermentation time producing bio-ethanol 13.1% (v/v) and 9.2% (v/v) in rotten grapesand apples respectively. Bioethanol yeild was observed to decreased with increasing fertmentation time beyond 3 days, probably due to microbial wastes such as CO2 that accumulates …

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Germination, Regeneration And Pigment Detection In Nelumbo Nucifera Gaertn. (Pink Asian Lotus) / Noraini Binti Mahmad, Noraini Mahmad Jan 2012

Germination, Regeneration And Pigment Detection In Nelumbo Nucifera Gaertn. (Pink Asian Lotus) / Noraini Binti Mahmad, Noraini Mahmad

Student Works (2010-2019)

In vivo and in vitro germination of three types of seeds including matured (black), immature or fruits (green) and young (yellow) of Nelumbo nucifera Gaertn. (pink Asian lotus) were done. The black and green seeds both gave the highest responses to technique of scarified with medium-sand paper and germinated in liquid (tap water) and solid (MS basal media) substrates. The black seeds with germination rate of 67.01±0.28% in vivo and 78.35±0.61% in vitro, while, green seed with 75.12±0.16% in vivo and 100.00% in vitro germination. The highest shoot length in seeds without cotyledon for black and green seed with 28.00±0.55 …

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Water Quality Monitoring Based On Support Vector Machine At Putrajaya Lake And Wetland / Zakirah Binti Mohd Azamli, Mohd Azamli Zakirah Jan 2012

Water Quality Monitoring Based On Support Vector Machine At Putrajaya Lake And Wetland / Zakirah Binti Mohd Azamli, Mohd Azamli Zakirah

Student Works (2010-2019)

A support vector machine (SVM) model is a machine learning technology. It is used for the proposed to classify the data by recognize the patterns of data. It is by work by train the data of sampling area to predict the water quality of Putrajaya Lake and Wetland based from data of water quality parameters of 29 sampling stations in study area. The following seven water quality parameters were used for the proposed of SVM classification, namely; dissolved oxygen (D.O), temperature (Temp), water pH, salinity, Biochemical Oxygen Demand dan Escherichia coli (E. coli). The dissolved oxygen variable is being used …

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An Empirical Assessment Of The Bootstrap Support As An Indicator Of Robustness In Phylogenetic Trees / So Wei Huo, Wei Huo So Jan 2012

An Empirical Assessment Of The Bootstrap Support As An Indicator Of Robustness In Phylogenetic Trees / So Wei Huo, Wei Huo So

Student Works (2010-2019)

Bootstrapping is a de-facto standard for displaying the validity of a phylogenetic tree. However this may not be the case as bootstrapping assume that the random sequence exist within the genome. In order to examine whether bootstrapping is a valid process, it must be done empirically. Across multiple taxa there are minimal fully curated genomes but there are mitochondrion genomes available to test this. A widely accepted evolutionary tree is chosen with 6 taxa - Pan paniscus (bonobo), Homo sapiens (human), Gorilla gorilla (gorilla), Pongo pygmaeus (orangutan), Hylobates lar (common gibbon) and Gallus gallus (red junglefowl) as the outgroup. A …

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Bioinformatic Analysis Of Degradome Data From African Oil Palm (Elaeis Guineensis Jacq.) Inflorescence / Sri Devi A/P Ramarao, Sri Devi Ramarao Jan 2012

Bioinformatic Analysis Of Degradome Data From African Oil Palm (Elaeis Guineensis Jacq.) Inflorescence / Sri Devi A/P Ramarao, Sri Devi Ramarao

Student Works (2010-2019)

African Oil Palm (Elaeis guineensis Jacq.) is an economically important plant since it is the highest yielding oil-producing crop in the world. Long reproductive cycle and slow seed maturation result in lengthy breeding cycles and a slow rate of improvement through selection. Demand to increase oil palm yield can be supported by analysis of oil palm sequence data towards a functional genomic approach to support marker assisted selection. In this study degradome data from inflorescence of the African Oil Palm was analysed to identify miRNA/siRNA cleavage products and SNPs in miRNA targets. Degradome analysis tools CleaveLand, SeqTar and PARESnip were …

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Genetic Polymorphisms Associated With Nasopharyngeal Carcinoma Susceptibility In Malaysian Chinese / Yew, Poh Yin, Poh Yin Yew Jan 2012

Genetic Polymorphisms Associated With Nasopharyngeal Carcinoma Susceptibility In Malaysian Chinese / Yew, Poh Yin, Poh Yin Yew

Student Works (2010-2019)

No abstract provided.

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Effect Of Selected Bacteria On The Antibacterial And Antioxidant Activities Of Centella Asiatica / Arash Rafat, Arash Rafat Jan 2012

Effect Of Selected Bacteria On The Antibacterial And Antioxidant Activities Of Centella Asiatica / Arash Rafat, Arash Rafat

Student Works (2010-2019)

The role of selected naturally distributed bacteria on the antibacterial and antioxidant activities and production of phenolic compounds in one of the most important Asian medicinal plants namely Centella asiatica was investigated based on the effects of beneficial and pathogenic bacteria on the metabolic pathways of plants as reported in literature. Firstly, antibacterial and antioxidant properties and production of phenolic compounds of two subspecies of C. asiatica which are commonly used in Malaysia (University of Malaya Herbarium Voucher Specimens: KLU047364 and KLU047552) were evaluated and the most potent of them was chosen for the rest of the study. Different antioxidant …

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Thermodegradation Of Medium-Chain-Length Poly (3 Hydroxyalkanoates), And Assessment Of The Biopolyesters And Oligoesters As Plasticizer For Poly(Vinyl Chloride) / Sin Mei Chan, Mei Chan Sin Jan 2012

Thermodegradation Of Medium-Chain-Length Poly (3 Hydroxyalkanoates), And Assessment Of The Biopolyesters And Oligoesters As Plasticizer For Poly(Vinyl Chloride) / Sin Mei Chan, Mei Chan Sin

Student Works (2010-2019)

Medium-chain-length poly(3-hydroxyalkanoates) (mcl-PHA) are natural polyesters of hydroxyl fatty acids, composed of monomers with 6 to 14 carbon atoms length. These biopolyesters are primarily synthesized by fluorescent pseudomonads under nutrient imbalance, as carbon and energy storage compounds. In this study, mcl-PHA were produced by Pseudomonas putida PGA1 using oleic acid (OA) and saponified palm kernel oil (SPKO) as carbon source in shake flasks and fed-batch fermentations. From thermogravimetric analysis (TGA), the mcl-PHA derived from oleic acid (PHAOA) showed a drastic decomposition at temperature above 183ºC, while mcl-PHA derived from saponified palm kernel oil (PHASPKO) above 196ºC. Therefore thermal degradation of …

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Synthesis, Characterization And Biological Studies Of Some Piperazines And Their Metal Complexes / Muhammad Saleh Salga, Muhammad Saleh Salga Jan 2012

Synthesis, Characterization And Biological Studies Of Some Piperazines And Their Metal Complexes / Muhammad Saleh Salga, Muhammad Saleh Salga

Student Works (2010-2019)

Piperazine derived Schiff bases were synthesized by an ethanolic condensation of 2- (piperazin-1-yl)ethanamine with either salicylaldehyde (LSP), 5-chlorosalicylaldehyde (LCS), 5-bromosalicylaldehyde (LBS), 5-nitrosalicylaldehyde (LNS), 5-hydroxy salicylaldehyde (LDH), 4-hydroxysalicylaldehyde (DHS), 5-methoxysalicylaldehyde (LHM) or 4-methoxysalicylaldehyde (HMS). Other Schiff bases were obtained from 1-(2- hydroxyphenyl)ethanone (2HP) and 1-(2,4-dihydroxyphenyl)ethanone (DHP). Schiff basemetal complexes of Cu(II), Zn(II) and Cd(II) were prepared by direct synthesis which yielded 1:1 metal-ligand ratio. The solid product formed was collected, washed with ethanol, recrystallized from suitable solvent and dried in a vacuum desiccator. The Schiff bases and their metal complexes were fully characterized by spectroscopic methods such as IR, 1H NMR, …

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Cytotoxic And Apoptotic Activities In Selected Phyllanthaceae Species Of Malaysia / Sujatha A/P Ramasamy, Sujatha Ramasamy Jan 2012

Cytotoxic And Apoptotic Activities In Selected Phyllanthaceae Species Of Malaysia / Sujatha A/P Ramasamy, Sujatha Ramasamy

Student Works (2010-2019)

Phyllanthaceae species have been extensively used in folk medicine in most tropical and subtropical countries for thousand of years. However, there is a paucity of information on the cytotoxic properties of these plants. Therefore, the present study was undertaken to evaluate the cytotoxic and apoptotic activity of crude methanol (CME), hexane (CHE) and ethyl acetate (CEE) extracts of the selected Phyllanthaceae species collected from different parts of Peninsular Malaysia, namely Phyllanthus niruri (dukong anak), P. pectinatus (Pokok Melaka), P. acidus (cermai), P. roseus (Labu Kuncing), P. watsonii and Baccaurea motleyana (rambai). Cytotoxic activities were screened using an in vitro assay …

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Isolation, Purification And Characterization Of Natural Red Pigment From Dragon Fruit (Hylocereus Polyrhizus) / Ow Rebecca Phui San, Rebecca Phui San Ow Jan 2012

Isolation, Purification And Characterization Of Natural Red Pigment From Dragon Fruit (Hylocereus Polyrhizus) / Ow Rebecca Phui San, Rebecca Phui San Ow

Student Works (2010-2019)

Stability, antioxidant properties, toxicology profile of betacyanins and selected target genes from Hylocereus polyrhizus were studied. In the stability study, the pigments were obtained using water extraction and juice concentration; extracted at room temperature (RT) and 100ºC; and stored under -20ºC, 4ºC and RT. In the water extraction method, the best weight: volume ratio was obtained using the ratio of 1:1. Pigments extracted at RT and from juice concentrate showed lower total betalain concentration changes as compared to samples extracted at 100ºC and from water extraction. Pigments stored at -20ºC under both extraction methods showed minimal change compared to those …

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Functionalized Indoles: Hetero- And Macrocyclization, Coordination Chemistry, And Biological Properties / Hamid Khaledi, Hamid Khaledi Jan 2012

Functionalized Indoles: Hetero- And Macrocyclization, Coordination Chemistry, And Biological Properties / Hamid Khaledi, Hamid Khaledi

Student Works (2010-2019)

Three indolyl-imine ligands have been synthesized through the condensation of S-benzyldithiocarbazate with indole-2-carbaldehyde, indole-3-carbaldehyde and indole-7-carbaldehyde. Treatment of these Schiff bases with acetate salts of Ni(II), Zn(II) and Cd(II) in ethanol yielded a series of complexes of 2:1 type (ligand/metal ratio) in which the ligands coordinated to the metal ions as monoanionic N,S-bidentate chelates. While the 2-imineindole and 3-imineindole formed the expected five-membered chelate rings, the X-ray crystal structure of [Cd(HL3)(py)2], (HL3 = the mono-deprotonated 7-imineindole), revealed an unusual mode of coordination, namely formation of four-membered rings with the metal atom. Reaction of the 7-imineindole with the metal ions in …

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Techno-Economic Analysis Of Biodiesel Production From Palm, Jatropha Curcas And Calophyllum Inophyllum For Road Transport In Malaysia / Ong Hwai Chyuan, Hwai Chyuan Ong Jan 2012

Techno-Economic Analysis Of Biodiesel Production From Palm, Jatropha Curcas And Calophyllum Inophyllum For Road Transport In Malaysia / Ong Hwai Chyuan, Hwai Chyuan Ong

Student Works (2010-2019)

Transportation sector has a dominant role in global fuel consumption and greenhouse gas emissions. Due to the dramatic increase in greenhouse gas emission, sustainable development of this sector has raised the concern in many countries including Malaysia. Biodiesel is a renewable energy that has great potential to serve as an alternative fuel to fossil diesel in the compression ignition (CI) engine. Although Malaysia is one of the biggest biodiesel fuel producers, the commercialization of biodiesel has not been fully undertaken in a large scale. Besides the technical barriers, there are several nontechnical limiting factors, which impede the development of biodiesel. …

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Synthesis And Self-Assembly Studies Of Glycoside Surfactants And Chromonics / Faramarz Aliasghari Sani, Faramarz Aliasghari Sani Jan 2012

Synthesis And Self-Assembly Studies Of Glycoside Surfactants And Chromonics / Faramarz Aliasghari Sani, Faramarz Aliasghari Sani

Student Works (2010-2019)

This thesis focused on the synthesis and self assembly studies of compounds involving carbohydrates. Two different types of materials were studied, i.e. surfactants and chromonics. Physical investigations of the compounds were conducted by TGA, DSC, OPM, UV-Vis spectroscopy, 1H NMR and surface tension measurements. Sugar-based surfactants are interesting compounds for pharmaceutical and personal care products. Current commercially available surfactants such as alkyl poly glucoside surfactants (APGs) are prepared from low miscibility of sugars and fatty alcohols. In order to solve the miscibility problems of the starting materials, homogenizers are required. This, however, leads to impurities in products, which affects the …

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Development And Validation Of Chromatographic Methods For The Determination Of Mycotoxins In Food / Ala’ Y.A. Sirhan., Ala’ Y. A. Sirhan Jan 2012

Development And Validation Of Chromatographic Methods For The Determination Of Mycotoxins In Food / Ala’ Y.A. Sirhan., Ala’ Y. A. Sirhan

Student Works (2010-2019)

The development and validation of analytical techniques to be applied for the determination of naturally occurring mycotoxins has been the focus of this study. The structure of this work is divided into four main parts, from which independent conclusions are drawn. The first part is in the development of a rapid, reliable and confirmatory method to determine the levels of aflatoxins B1, B2, G1, and G2 in barley, wheat, soybeans and corn. This method is based on a single extraction step followed by liquid chromatography coupled with electrospray ionization quadrupole time of flight mass spectrometry (LC-ESI-QTOF-MS/MS). The sensitivity of the …

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Probing Understanding: Emergent Second Language Readers’ Visual Literacy / Marina Binti Mohd Arif, Mohd Arif Marina Jan 2012

Probing Understanding: Emergent Second Language Readers’ Visual Literacy / Marina Binti Mohd Arif, Mohd Arif Marina

Student Works (2010-2019)

Due to the visually saturated world we live in more children are becoming visual learners but the school curriculum is yet to acknowledge this change and a lot of literacy teaching still focuses on the ability to decode and encode printed words. There is a need then to look into the potential of visuals in the teaching of second language literacy and to acknowledge the individual differences and needs of young learners. This study was conducted to better understand emergent second language readers’ visual literacy by looking at the meaning-making process that children engage in when transacting with books that …

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Evolutionary Trace Analysis Of A Zinc Metalloenzyme – Alcohol Dehydrogenase / Sakinah Jamil, Jamil Sakinah Jan 2012

Evolutionary Trace Analysis Of A Zinc Metalloenzyme – Alcohol Dehydrogenase / Sakinah Jamil, Jamil Sakinah

Student Works (2010-2019)

Molecular evolution is the study of the evolutionary patterns and processes of nucleic acids and proteins to understand the phylogenetics, population genetics, biogeography, and other areas of research at the DNA, RNA and protein levels of the biological organization. Evolutionary trace method is a technique to identify evolutionary important residues and their positions in a group of protein alignment. In this study, the zinc metalloenzyme alcohol dehydrogenases (ADH) of the eukaryote Mus musculus (mouse) was used as the sequence of interest against 48 other bacteria species. BLAST was used to identify the 48 bacteria species with the closest ADH sequences …

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Antidiabetic Activity Of Leptospermum Flavescens In Alloxan - Induced Diabetic Rats / Asmawati Abd Rahim, Abd Rahim Asmawati Jan 2012

Antidiabetic Activity Of Leptospermum Flavescens In Alloxan - Induced Diabetic Rats / Asmawati Abd Rahim, Abd Rahim Asmawati

Student Works (2010-2019)

The phytochemical analysis was carried out using hexane, chloroform and water extraction of the leaves and stems of L. flavescens. The detection methods used were thin layer chromatography (TLC), high performance liquid chromatography (HPLC) and liquid chromatography mass spectrometry combined with mass spectrometry (LCMS/MS). The TLC of all extracts using three solvents screened for flavonoids, alkaloids, saponins, terpenoids and essential oils. The HPLC have been identified quercetin, gallic acid and tannic acid using authentic standards. The HPLC chromatograms were poorly separated and not very convincing to confirm the three compounds. However the liquid chromatography mass spectrometry combined with mass spectrometry …

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Proteomic Analysis Of Urinary Proteins From Patients With Ovarian Cancer And Cervical Cancer / Siti Suhana Abdullah Soheimi, Abdullah Soheimi Siti Suhana Jan 2012

Proteomic Analysis Of Urinary Proteins From Patients With Ovarian Cancer And Cervical Cancer / Siti Suhana Abdullah Soheimi, Abdullah Soheimi Siti Suhana

Student Works (2010-2019)

Diagnosis of ovarian carcinoma is in urgent need for new complementary biomarkers for early stage detection. In order to find an alternative procedure to replace an uncomfortable conventional method in detecting cervical cancer, a proteomic approach in screening the urinary proteins were employed. Proteins that are aberrantly excreted in the urine of cancer patients are excellent biomarker candidates for development of new non-invasive protocol for early diagnosis and screening purposes. In the present study, urine samples from patients with ovarian carcinoma and cervical cancer were analysed by two-dimensional gel electrophoresis (2-DE) and the profiles generated were compared to those similarly …

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Diversity Of Understorey Residence Bird In Recently Disturbed And Regenerated Forest In Peninsular Malaysia / Zubaidah Ya’Cob, Ya'cob Zubaidah Jan 2012

Diversity Of Understorey Residence Bird In Recently Disturbed And Regenerated Forest In Peninsular Malaysia / Zubaidah Ya’Cob, Ya'cob Zubaidah

Student Works (2010-2019)

The understanding of the relationship between avian community structure and environmental/ecological change has become the priority for biodiversity conservation processes and predicting the environmental health. Microhabitat change due to logging is one of the components that affects the species composition in the forest understorey. Forest regeneration allows the recovery of understorey bird species to almost as unlogged forest. However, the process generally will take a long period. The aim of this study is to document diversity and composition of understorey bird species inhabiting two forests of about 30 and 50 years after logging. Mist-netting technique was applied in both study …

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Determination Of Pesticides In Water Samples Using Dispersive Liquid – Liquid Microextraction (Dllme) And Gas Chromatography- Micro Electron Capture Detector (Gc-Μecd) / Husna Binti A Hamid, A Hamid Husna Jan 2012

Determination Of Pesticides In Water Samples Using Dispersive Liquid – Liquid Microextraction (Dllme) And Gas Chromatography- Micro Electron Capture Detector (Gc-Μecd) / Husna Binti A Hamid, A Hamid Husna

Student Works (2010-2019)

The surface modification of magnetic nanoparticles was carried out in order to change the polarities. The coated particles with octyl group on the surface to ensure the attachment of the functional group and hence improved the extraction process in two step of Dispersive Liquid Liquid Microextraction, DLLME method. Combination of two steps of DLLME method and Gas Chromatography Electron Captured Detector, GC-ECD were used for the extraction and determination of pesticides extracted from water samples (treated waste water, tap water from laboratory and housing area). In this extraction method, CCl4 was selected as the extraction solvent since it shows the …

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Isolation And Characterization Of Microsatellite Loci In An Endangered Palm Johannesteijsmannia Lanceolata (Arecaceae) / Ang Cheng Choon, Cheng Choon Ang Jan 2012

Isolation And Characterization Of Microsatellite Loci In An Endangered Palm Johannesteijsmannia Lanceolata (Arecaceae) / Ang Cheng Choon, Cheng Choon Ang

Student Works (2010-2019)

No abstract provided.

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Synthesis, Characterization And Fluorescence Properties Of Selected Amino Derivatives Of Quinoline / Zainal Abidin Hasan, Hasan Zainal Abidin Jan 2012

Synthesis, Characterization And Fluorescence Properties Of Selected Amino Derivatives Of Quinoline / Zainal Abidin Hasan, Hasan Zainal Abidin

Student Works (2010-2019)

ii ABSTRACT 2-N-(3-methyl)piperidinoquinoline (25), 2-N-(4-methyl)piperidinoquinoline (26), 2-N-anilinoquinoline (28), 2-N- (m-methyl)anilinoquinoline (30), 2-N-(p-methyl)anilinoquinoline (32), 2-N-(m-ethyl)anilinoquinoline (34), 2-N-(p-ethyl)anilinoquinoline (36), 2-N-methylanilinoquinoline (38), 2-N-ethylanilinoquinoline (40), 2-N-(m-methoxy)anilinoquinoline (42), 2-N-(p-methoxy)anilinoquinoline (44), 2-N-(m-chloro)anilinoquinoline (46), and 2-N-(p-chloro)anilinoquinoline (48) were prepared by reacting 2-chloroquinoline (22) with 3-methylpiperidine (23), 4-methylpiperidine (24), aniline (27), m-toluidine (29), p-toluidine (31), m-ethylaniline (33), p-ethylaniline (35), N-methylaniline (37), N-ethylaniline (39), m-anisidine (41), p-anisidine (43), m-chloroaniline (45) and p-chloroaniline (47) respectively. The structure of these compounds were confirmed using 1H NMR, 13C NMR, infra-red and GCMS. The fluorescence properties were recorded using Luminescence Spectrophotometer. Almost all compounds prepared showed highest fluorescence intensity in less polar solvents …

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Differentiation Of Oral Candidal Species Based On The Internally Transcribed Spacer (Its) Regions Of Rdna / Raja Ahmad Zahir Raja Halinuddin, Raja Ahmad Zahir Raja Halinuddin Jan 2012

Differentiation Of Oral Candidal Species Based On The Internally Transcribed Spacer (Its) Regions Of Rdna / Raja Ahmad Zahir Raja Halinuddin, Raja Ahmad Zahir Raja Halinuddin

Student Works (2010-2019)

Candida is a genus of opportunistic yeast that are usually harmless residents of the oral cavity, but they become pathogenic under conditions which allow them to increase their proportion to other members of the oral microflora. Correct and accurate identification of the candidal species infecting an oral candidiasis patient is important due to antifungal drug resistences. The region in the fungal genome that contains the gene that codes for rRNA, also known as rDNA, has been found to be useful for phylogenetic studies and species identification. The purpose of this study is to compare the candidal loads of denture wearers, …

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Effects Of Brucea Javanica And Piper Betle Extracts On Oral Candida Spp / Mohd-Al-Faisal Nordin, Nordin Mohd Al-Faisal Jan 2012

Effects Of Brucea Javanica And Piper Betle Extracts On Oral Candida Spp / Mohd-Al-Faisal Nordin, Nordin Mohd Al-Faisal

Student Works (2010-2019)

Candida species is an opportunistic microorganism residing in the human oral cavity. There is increasing prevalence of candidal infections in the oral cavity largely because of the increasing size of the population at risk. The rise in diagnosed cases of oral candidiasis is also due to the immunosuppressive effect of prescribed antifungal agents on resistant hosts. The ability of Candida species to adhere on mucosal tissues and/or denture surfaces, and the production of hydrolytic enzymes along with defective host immunity are among the known key factors of invasions and pathogenesis of oral candida. Although Candida albicans remains as the most …

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Microbial Assessment Of Dental Unit Waterline System (Duws)/ Chua Chong Sing, Chong Sing Chua Jan 2012

Microbial Assessment Of Dental Unit Waterline System (Duws)/ Chua Chong Sing, Chong Sing Chua

Student Works (2010-2019)

Introduction: Dental Unit Waterline System (DUWS) is an interconnected water network found inside a dental chair unit (DCU) that allows water to pass through and deliver to the patient’s mouth during treatment. Many previous studies demonstrated the DUWS water was often heavily contaminated and might pose a risk of infection to the patients as well as dental personnel. Objective: To determine the sanitary level of output water from DCUs and assess the effectiveness of silver-coated tubing used in DCU in reducing microbial counts in DUWS water. Methods: Water from sources which include the air-water syringe, low speed handpiece, high speed …

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