Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2013

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 16531 - 16560 of 19589

Full-Text Articles in Entire DC Network

Effects And Control Of Barnacle Infestation On Mangrove Seedlings In A Mangrove Rehabilitation Site / Tan Yee Siang, Yee Siang Tan Jan 2013

Effects And Control Of Barnacle Infestation On Mangrove Seedlings In A Mangrove Rehabilitation Site / Tan Yee Siang, Yee Siang Tan

Student Works (2010-2019)

A study on the development, effects and control of biofouling on replanted mangrove seedlings (40-50cm height) was carried out, from April 2008 to July 2010, at Kampung Sungai Haji Dorani and Kampung Sungai Limau, Selangor, Malaysia. The dominant biofoulers were barnacles (Amphibalanus amphitrite), which were the main causal organism of mangrove seedling damage or death. The high density (>100 no./ 10 cm section of plant stem) and cover (>30 %) of barnacles appeared to obstruct development of new leaves, shoots and roots, as well as imposing weight loads as high as six times the weight of the seedlings. …

Go to article

Synthesis Of Functionalized Graphene/Copper Oxide (Cuo) Nanocomposites And Their Catalytic Activity / Norazriena Binti Yusoff, Norazriena Yusoff Jan 2013

Synthesis Of Functionalized Graphene/Copper Oxide (Cuo) Nanocomposites And Their Catalytic Activity / Norazriena Binti Yusoff, Norazriena Yusoff

Student Works (2010-2019)

Graphene sheets incorporated with inorganic metal oxides are emerging as a new class of exciting materials. Nanostructured CuO-based materials have been widely investigated because they are inexpensive, non-toxic, and have unique features such as narrow band gap and high solar absorbency. The focus of this research is to fabricate and characterize copper oxide (CuO) nanostructures, functionalized graphene oxide (FGO) and functionalized graphene/copper oxide (FG/CuO) nanocomposite as well as a study of their catalytic activity. Such a study is important in order to predict the suitability of the FG/CuO nanocomposite as a catalyst for the treatment of wastewater contained dyes. Firstly, …

Go to article

Creative Adoption Of Ms Excel In Teaching And Learning Of Chemistry In Malaysia / Lee Sui Chin, Sui Chin Lee Jan 2013

Creative Adoption Of Ms Excel In Teaching And Learning Of Chemistry In Malaysia / Lee Sui Chin, Sui Chin Lee

Student Works (2010-2019)

This study concerns the creative use of MS Excel in teaching and learning chemistry in Malaysian secondary schools and universities. It is used to explain, explore and understand chemical concepts. Topics such as chemical kinetics, gas compressibility, distribution of molecular speed, period three elements, qualitative analysis, spectroscopy and chemical equilibrium were chosen from Form Six and first/second year university syllabus as examples. For the “qualitative analysis” workbook, a set of videos showing the reactions described are also provided to give the ‘intuitive feel’ of the experiments described in the worksheets. Simple functions in Excel such as ‘Active X’ control tool …

Go to article

Phylogenetics Of Bactrocera Fruit Flies In Malaysia With Reference To Selected Host Fruits / Joey Ee Uli, Ee Uli Joey Jan 2013

Phylogenetics Of Bactrocera Fruit Flies In Malaysia With Reference To Selected Host Fruits / Joey Ee Uli, Ee Uli Joey

Student Works (2010-2019)

Bactrocera carambolae and Bactrocera papayae fruit flies, also known as the carambola and papaya fruit fly respectively, are significant pest fruit flies in Malaysia. They are capable of causing losses in the agricultural industry by infesting host fruits and making them unable to be sold. These two species are grouped in the Bactrocera dorsalis species complex, and are oftentimes difficult to distinguish from one another due to similar and intermediate morphological characteristics. A precise method for identifying pest fruit flies is important to properly monitor the infestation of host fruits, for the purpose of quarantine management. The aims of this …

Go to article

Cloning, Expression And Functional Study Of Specific Dna Markers For Salmonella Typhi / Noradilin Binti Abdullah, Noradilin Abdullah Jan 2013

Cloning, Expression And Functional Study Of Specific Dna Markers For Salmonella Typhi / Noradilin Binti Abdullah, Noradilin Abdullah

Student Works (2010-2019)

ST332 is a 332 bp gene marker used in a patented Salmonella kit for detection of foodborne pathogen, Salmonella Typhi. As the gene is specific in DNA based detection by using polymerase chain reaction (PCR), its specificity in immunoassay is studied. For this purpose, an expression system of the gene is constructed and the expressed recombinant ST332 protein is tested for reactivity by hybridizing it towards typhoid patients sera through dot blotting. Initially, the DNA fragment was amplified with PCR and cloned into pGEX-4T-1 plasmid vector and transformed into E. coli BL21. Sequencing of the 332 bp fragment identified it …

Go to article

Nationwide Distribution And Insecticide Resistance Study Of Malaysian Mosquito Culex Quinquefasciatus Say By Molecular And Biochemical Tools / Low Van Lun, Van Lun Low Jan 2013

Nationwide Distribution And Insecticide Resistance Study Of Malaysian Mosquito Culex Quinquefasciatus Say By Molecular And Biochemical Tools / Low Van Lun, Van Lun Low

Student Works (2010-2019)

A nationwide investigation was carried out to (1) determine the distribution of Culex quinquefasciatus and other species of mosquitoes in stagnant water in residential areas, (2) investigate the genetic diversity of Cx. quinquefasciatus, (3) quantify the insecticide susceptibility status of Cx. quinquefasciatus, (4) characterize the biochemical mechanisms of insecticide resistance in Cx. quinquefasciatus, (5) characterize the molecular mechanisms of insecticide resistance in Cx. quinquefasciatus from 13 states and one federal territory in Malaysia. Culex larval surveillance indicated that Cx. quinquefasciatus was the predominant species in residential areas. Several habitat characteristics (i.e., pH, conductivity, salinity, total dissolved solids, elevation and dissolved …

Go to article

Isolation And Characterization Of Listeria Monocytogenes From Ready-To-Eat Food / Hossein Jamali, Hossein Jamali Jan 2013

Isolation And Characterization Of Listeria Monocytogenes From Ready-To-Eat Food / Hossein Jamali, Hossein Jamali

Student Works (2010-2019)

Listeria monocytogenes (L. monocytogenes) is an important cause of listeriosis, a common foodborne disease of public health importance. Ready-to-eat (RTE) foods are known as a potential source of listeriosis. There are limited studies in the characterisation of L. monocytogenes in Malaysia. The objectives of the study were to determinate the prevalence of Listeria species and L. monocytogenes in RTE foods in Malaysia and to characterise these isolates by using molecular methods. Two hundred fifty RTE food samples, including cooked beef and beef products, beverages, cooked chicken and chicken products, fried egg and egg products, packed lunch, salad and vegetables, and …

Go to article

Some Outlier Problems In A Circular Regression Model / Safwati Binti Ibrahim, Safwati Ibrahim Jan 2013

Some Outlier Problems In A Circular Regression Model / Safwati Binti Ibrahim, Safwati Ibrahim

Student Works (2010-2019)

This study looks at three problems related to the JS circular regression model with five objectives in mind. The first two objectives are concerned with the problem of outliers in the model. The first is the investigation of the robustness of the JS circular regression estimation method in the presence of outliers in the data set. The second is the use of three numerical tests based on row deletion approach to detect possible outliers in the JS circular regression model. The first test considered is a modified version of the COVRATIO statistic by utilizing the covariance matrix of residuals of …

Go to article

Isolation, Purification And Antimicrobial Action Of Peptides Produced By Streptococcus Salivarius Isolated From Malaysian Subjects / Abdelahhad Barbour, Abdelahhad Barbour Jan 2013

Isolation, Purification And Antimicrobial Action Of Peptides Produced By Streptococcus Salivarius Isolated From Malaysian Subjects / Abdelahhad Barbour, Abdelahhad Barbour

Student Works (2010-2019)

Streptococcus salivarius is known to produce different bacteriocin-like inhibitory substances (BLIS). In this study six S. salivarius strains were isolated from different Malaysian subjects. The isolates were identified using morphological and biochemical characterization and 16S rDNA gene sequencing. Levansucrase enzyme was characterized from sucrose-enriched culture of strain S. salivarius YU10. BLIS production was investigated using simultaneous and deferred antagonism tests that showed YU10 and NU10 as the best BLIS-producing strains among the Malaysian isolates in this study. Strain HJEFF was the only S. salivarius isolate which produced a more limited quantity of BLIS in liquid medium. However, all other strains …

Go to article

The Use Of On-Line Analytical Processing Approach In Developing Host-Parasite Database System / Nur Imtiazah Bt. Shuhaimi, Shuhaimi Nur Imtiazah Jan 2013

The Use Of On-Line Analytical Processing Approach In Developing Host-Parasite Database System / Nur Imtiazah Bt. Shuhaimi, Shuhaimi Nur Imtiazah

Student Works (2010-2019)

Biodiversity is a very broad area to explore. The developments of research have resulted in increasing the number of biodiversity data in various formats. The ability of a database in dealing with biodiversity data is essential for the effective management and information dissemination process. The capabilities of a database system rely on the formula or approaches used in operating the system. The development of On-Line Analytical Processing (OLAP) technology from time to time expands the use of this approach which previously was dominated by the business field. The effectiveness of structuring data into cube form technique allows data modeling and …

Go to article

Quorum Sensing And Quorum Quenching Abilities Of Selected Bacteria Isolated From Antarctic / See-Too Wah Seng, Wah Seng See-Too Jan 2013

Quorum Sensing And Quorum Quenching Abilities Of Selected Bacteria Isolated From Antarctic / See-Too Wah Seng, Wah Seng See-Too

Student Works (2010-2019)

Quorum sensing (QS) is a phenomenon which refers to bacterial cell-to-cell communication in a population manner. QS regulates diverse activities in bacteria. Bacteria that possess QS activity communicate through secreted signal molecules or autoinducer. The Gram-negative bacteria and archaeon use acyl homoserine lactones (AHLs) as a QS signal to achieve regulation through the luxI-luxR homolog system, wheareas Gram-positive bacteria use small peptides as autoinducers. Some of the Proteobacteria use quinolone compound as signaling molecules. Quorum quenching (QQ) on the other hand refers to interference of QS that inactivates the signaling molecules. Even though QS and QQ were extensively studied in …

Go to article

Development Of Environmental Safety And Health Conceptual Model For Steel Factory / Nur Shuhada Bt. Mohamed Jaafar, Mohamed Jaafar Nur Shuhada Jan 2013

Development Of Environmental Safety And Health Conceptual Model For Steel Factory / Nur Shuhada Bt. Mohamed Jaafar, Mohamed Jaafar Nur Shuhada

Student Works (2010-2019)

Since modernization and industrialization have led to human loss and tragedies, due to industrial accidents all over the world, it is significant to look at the aspects that lead to success of environmental safety and health (ESH) situation. The safety statistics indicate high fatality and injury rates among the manufacturing employees. This paper focuses on developing an ESH Conceptual Model, based on related recommended OSHMS models in the existing of OHSAS: 18001 Standard and Guidelines. Besides, the effectiveness of OSHMS implementation was evaluated, by identifying the potential hazards and practical methods in minimizing workplace accidents. A case study has been …

Go to article

Molecular Studies Of Kappaphycus Doty And Eucheuma J. Agardh: Phylogenetics And Dna Barcode Assessment / Tan Ji, Ji Tan Jan 2013

Molecular Studies Of Kappaphycus Doty And Eucheuma J. Agardh: Phylogenetics And Dna Barcode Assessment / Tan Ji, Ji Tan

Student Works (2010-2019)

Kappaphycus and Eucheuma are the main producers of carrageenan worldwide, with stable annual production increments to cater to increasing demands. Extensively used in the food and cosmetics industries, the marketing of carrageenan generates lucrative returns to the industry and economy. The carrageenan industry is one of the key economic sectors in Malaysia, which also offers a means of livelihood to the local community. The extensive morphological variations of Kappaphycus and Eucheuma often resulted in faming of mixed populations which reduced overall carrageenan yields. Molecular taxonomy is thus applied to identify the many locally-named varieties of Kappaphycus and Eucheuma as well …

Go to article

An Ecological Study Of Pteroma Pendula (Iepidoptera: Psychidae) In Oil Palm Plantations With Emphasis On The Predatory Activities Of Oecophylla Smaragdina (Hymenoptera: Formicidae) On The Bagworm / Exelis Moise Pierre, Moise Pierre Exelis Jan 2013

An Ecological Study Of Pteroma Pendula (Iepidoptera: Psychidae) In Oil Palm Plantations With Emphasis On The Predatory Activities Of Oecophylla Smaragdina (Hymenoptera: Formicidae) On The Bagworm / Exelis Moise Pierre, Moise Pierre Exelis

Student Works (2010-2019)

A study entitled “An ecological study of Pteroma pendula (Lepidoptera: Psychidae) in oil palm plantations with emphasis on the predatory activities of Oecophylla smaragdina (Hymenoptera: Formicidae) on the bagworm was conducted at the MPOB Research Plantation at Teluk Intan, Perak, Malaysia from 11.11.2010 to 31.01.2013. The main objectives of the study was to assess the infestation of P. pendula and investigate a correlation between pest density fluctuations with abiotic factors in the study area and to elucidate O. smaragdina occupancy pattern and its predatory behaviours towards P. pendula as well as assessing the productivity of palm trees occupied and not …

Go to article

Chemical Constituents And Bioactivity Of Mitrella Kentii (Bl.) Miq. (Annonaceae) / Ainnul Hamidah Syahadah Binti Azizan, Ainnul Hamidah Syahadah Azizan Jan 2013

Chemical Constituents And Bioactivity Of Mitrella Kentii (Bl.) Miq. (Annonaceae) / Ainnul Hamidah Syahadah Binti Azizan, Ainnul Hamidah Syahadah Azizan

Student Works (2010-2019)

The phytochemical and bioactivity studies on Mitrella kentii species from Annonaceae family have been performed. The extraction of phytochemicals from dried and ground plants were performed using conventional method extractions; Soxhlet extractor and Cold-extraction. The isolation of pure compounds from crude extracts were carried out by using various chromatographic methods such as column chromatography (CC), thin layer chromatography (TLC) and preparative thin layer chromatography (PTLC). The structural elucidations of the isolated compounds were established based on the spectroscopic techniques such as UV-Vis, IR, MS, 1D-NMR (1H-NMR and 13C-NMR), 2D-NMR (COSY, DEPT, HSQC and HMBC) and single crystal X-ray diffraction analysis. …

Go to article

Radio Frequency Interference (Rfi) In Solar Monitoring / Norsuzian Binti Mohd Anim, Norsuzian Mohd Anim Jan 2013

Radio Frequency Interference (Rfi) In Solar Monitoring / Norsuzian Binti Mohd Anim, Norsuzian Mohd Anim

Student Works (2010-2019)

Radio frequency interference (RFI) distorted the detection of solar bursts from ground based observation. By using Compact Astronomical Low-cost Low-frequency Instrumentation Spectrometer Transportable Observatory (CALLISTO), the physical characteristic of solar burst, the structures of sun, velocity of solar flares are being studied. The results are useful for space weather studies and to protect the communication satellites and the space station. The interference from terrestrial sources of 13 chosen CALLISTO station all around the world are being identified. The objective is to understand the RFI’s impacts to the detection of solar monitoring from ground base. This study found that the highest …

Go to article

Tissue Culture Studies, Secondary Metabolites And Pigment Extraction From Allamanda Cathartica L. / Wong Kim Fah, Kim Fah Wong Jan 2013

Tissue Culture Studies, Secondary Metabolites And Pigment Extraction From Allamanda Cathartica L. / Wong Kim Fah, Kim Fah Wong

Student Works (2010-2019)

Allamanda cathartica L. is a potential medicinal plant which starts to achieve public awareness due to its nutritional value that able to treat various types of diseases, especially in the treatment of jaundice, malaria and cancer. Tissue culture studies were undertaken to examine the effects of different plant growth regulators (PGRs) on the callus induction from leaf and stem explants of this species. Surface sterilization by mercuric (II) chloride (HgCl2) was utilized in order to surface sterilize the leaf (0.1%) and stem (0.2%) explants. The leaf and stem explants were cultured on full-strength Murashige and Skoog (MS) medium supplemented with …

Go to article

Phytochemical And Biological Studies On Lindera Oxyphylla And Litsea Costalis (Nees) Kosterm (Lauraceae) / Masoumeh Hosseinzadeh, Masoumeh Hosseinzadeh Jan 2013

Phytochemical And Biological Studies On Lindera Oxyphylla And Litsea Costalis (Nees) Kosterm (Lauraceae) / Masoumeh Hosseinzadeh, Masoumeh Hosseinzadeh

Student Works (2010-2019)

The phytochemical studies on Lindera oxyphylla and Litsea costalis (Nees) Kosterm from the family Lauraceae were performed. The extraction process was carried out using various solvent such as hexane, dichloromethane and methanol and the separation was conducted using column chromatography followed by preparative TLC or PTLC and finally the structural elucidation of isolated compounds was established on the basis of spectroscopic studies such as UV, IR, CD, OR, 1D and 2D NMR and MS (LC-MS) experiments. A total of thirty compounds were isolated from Lindera oxyphylla and Litsea costalis (Nees) Kosterm and these plant species have never been investigated before. …

Go to article

Formulation Of Invariants For Discrete Orthogonal Moments And Image Classification / Pee Chih Yang, Chih Yang Pee Jan 2013

Formulation Of Invariants For Discrete Orthogonal Moments And Image Classification / Pee Chih Yang, Chih Yang Pee

Student Works (2010-2019)

The aim of this thesis is to study invariant algorithms for the domain of discrete orthogonal moments. The invariants are anisotropic scale and translation invariants, translation, rotation and scale invariants, and affine moment invariants. Due to the complexity of hypergeometric functions, existing invariant algorithms are slow. In addition, some of the features have poor classification performance and are highly sensitive to the noise. Therefore new sets of invariant algorithms have been proposed to resolve the above mentioned issues. Discrete Tchebichef moments are selected as the implementation platform of the proposed algorithms.To evaluate the performance of invariant algorithms, empirical studies have …

Go to article

Pressure Sensitive Adhesives From Natural Rubber Latex And Oleic Acid-Based Alkyds / Siti Fatimah Binti Mohd Mustafa, Siti Fatimah Mohd Mustafa Jan 2013

Pressure Sensitive Adhesives From Natural Rubber Latex And Oleic Acid-Based Alkyds / Siti Fatimah Binti Mohd Mustafa, Siti Fatimah Mohd Mustafa

Student Works (2010-2019)

Development of environmental friendly products have becomes increasingly important in the recent years. This project is environmental concerns and new developments in adhesive technology to create safe systems that reduce the emission of volatile organic compounds (VOCs). In this study, pressure sensitive adhesives (PSAs) were synthesized directly from latex by using alkyd derived from palm oil-based polyester as tackifier resin. Firstly, three different oil lengths 45, 47 and 65 of alkyd resins namely (Alk-45, Alk47 and Alk-65) were synthesized under fatty acid process by employing fusion cook technique. The prepared resins were later characterized by FTIR, NMR, TGA, GPC and …

Go to article

Species Distribution And Molecular Variations In Drogonflies (Order: Odonata) Within The State Of Selangor, Malaysia / Noorhidayah Binti Mamat, Mamat Noorhidayah Jan 2013

Species Distribution And Molecular Variations In Drogonflies (Order: Odonata) Within The State Of Selangor, Malaysia / Noorhidayah Binti Mamat, Mamat Noorhidayah

Student Works (2010-2019)

Dragonflies have been used in an extensive array of studies dealing with the functional morphology, behavior, ecology, and evolution. They have been indicated to be important in functioning as bioindicators. The major aim of this study is to investigate the dragonfly population in the Selangor areas and to conduct the analysis on the molecular systematic and phylogenetics. Field sampling was done in 22 sites for the odonate biodiversity studies and the mitochondrial gene – partial regions of NADH dehydrogenase subunit 1 (ND1) was utilized for the molecular aspects. The results revealed a total of 1298 individuals belonging to 54 species …

Go to article

Alkaloids From Alstonia Macrophylla / Lim Siew Huah, Siew Huah Lim Jan 2013

Alkaloids From Alstonia Macrophylla / Lim Siew Huah, Siew Huah Lim

Student Works (2010-2019)

The Malaysian plant, Alstonia macrophylla Wall, was investigated for its alkaloidal content and the results are summarized in the Table below. A total of 90 alkaloids were isolated and characterized from the leaf and stem-bark of A. macrophylla. Of these, 30 are new alkaloids. The leaf extract of A. macrophylla yielded a total of 13 new alkaloids, including a macroline indole 1, a macroline oxindole 16, eight akuammiline alkaloids (compounds 24, 25, 26, 27, 28, 29, 30, and 31), a sarpagine alkaloid 32, and two ajmaline alkaloids (compounds 33 and 34). The stem-bark extract of A. macrophylla gave a total …

Go to article

Structure, Reactions, And Partial Syntheses Of Indole Derivatives / Low Yun Yee, Yun Yee Low Jan 2013

Structure, Reactions, And Partial Syntheses Of Indole Derivatives / Low Yun Yee, Yun Yee Low

Student Works (2010-2019)

Two new alkaloids of the mersinine type, mersiphyllines A (37) and B (38), were isolated from the polar fraction of the alkaloid extract of K. singapurensis following repeated fractionation via gel-permeation chromatography. The structures of these alkaloids were elucidated based on NMR spectroscopy, formation of an alkaloid-borane complex 40, as well as X-ray diffraction analysis. Concise partial syntheses of several new indole alkaloids isolated from Tabernaemontana, Alstonia, and Leuconotis species were carried out. These include, lirofoline A (44) from ibogaine (46), alstolucine A (91) from alstolucine B (94), and ()-eburnamaline (96) from (+)-eburnamonine (98). Some transformations of the ring-opened Aspidosperma …

Go to article

Development Of Microsatellite Markers For Differentiation Of Gracilaria Species / Song Sze Looi, Sze Looi Song Jan 2013

Development Of Microsatellite Markers For Differentiation Of Gracilaria Species / Song Sze Looi, Sze Looi Song

Student Works (2010-2019)

Gracilaria is a red seaweed that has been cultivated worldwide and is commercially used for food, fertilizers, animal fodder and hydrocolloids. However, the high morphological plasticity and the lack of distinctive reproductive structures often lead to the misidentification in the traditional identification of Gracilaria species. Molecular markers are important especially in the correct identification of Gracilaria species with high economic value. Various types of molecular markers, for example random amplified polymorphic DNA (RAPD), restriction fragment length polymorphism (RFLP) and amplified fragment length polymorphism (AFLP) have been used in the study of seaweeds but there are always limitations arising from each …

Go to article

Tissue Culture, Cellular Behaviour And Pigment Analysis Of Agapanthus Praecox Ssp. Minimus / Jamilah Syafawati Yaacob, Jamilah Syafawati Yaacob Jan 2013

Tissue Culture, Cellular Behaviour And Pigment Analysis Of Agapanthus Praecox Ssp. Minimus / Jamilah Syafawati Yaacob, Jamilah Syafawati Yaacob

Student Works (2010-2019)

In vitro regeneration and somatic embryogenesis of Agapanthus praecox ssp. minimus were successfully achieved in this study from three types of explants (leaf, root and bulb) that were cultured on MS (Murashige and Skoog, 1962) media supplemented with various hormones at different concentrations and on plant growth regulator-free MS media as control. Bulb explant was identified as the most responsive explant for direct regeneration of A. praecox ssp. minimus, while leaf and root explants failed to produce any shoots or roots. In contrast, both leaf and root explants were found to be very responsive in callus induction and production of …

Go to article

Expression Of Fungal Infection Response Genes And Protein Frofiles In Oil Palm (Elaeis Guineensis Jacq.) Roots During Basal Stem Rot Infection By Ganoderma Boninense / Jameel Rabee Al-Obaidi, Jameel Rabee Al-Obaidi Jan 2013

Expression Of Fungal Infection Response Genes And Protein Frofiles In Oil Palm (Elaeis Guineensis Jacq.) Roots During Basal Stem Rot Infection By Ganoderma Boninense / Jameel Rabee Al-Obaidi, Jameel Rabee Al-Obaidi

Student Works (2010-2019)

Basal stem rot disease (BSR) is a common disease that affects the Malaysian oil palm. The disease devastates thousands of hectares of oil palm plantings in Southeast Asia every year. It is caused by the fungus Ganoderma boninense, which infects the oil palm trees, causing loss of yield and finally killing the trees. In the present study, gene expression and proteomic investigations were carried out on the root tissues of the oil palm infected with G. boninense. While the gene expression data obtained from this study may be used in future work on the development of resistant or tolerant oil …

Go to article

Bioremediation And Phytoremediation Of Diesel Fuel Contaminated Soil Using Organic Wastes / Arezoo Dadras Nia, Arezoo Dadrasnia Jan 2013

Bioremediation And Phytoremediation Of Diesel Fuel Contaminated Soil Using Organic Wastes / Arezoo Dadras Nia, Arezoo Dadrasnia

Student Works (2010-2019)

Contamination of soil by organic compounds, especially hydrocarbon, is prevalent in industrialized and oil producing countries of the world. About 1.7 to 8.8 million metric tons of oil is released into the water and soils every year. This may pose a great threat to the environment and human being at large. This study evaluated the efficiency of organic wastes (biowastes) as supplementations for remediation of diesel fuel contaminated soil. Three organic wastes [tea leaf (TL), Soybean cake (SC) and Potato skin (PS)] and two economically viable plants (Dracaena reflexa and Podocarpus polystachyus) were utilized to evaluate the biodegradation of diesel …

Go to article

Antibacterial Properties Of Synthetic Peptides And Schiff Base Compounds Against Different Types Of Clinical Bacteria / Chow Wei Chon, Wei Chon Chow Jan 2013

Antibacterial Properties Of Synthetic Peptides And Schiff Base Compounds Against Different Types Of Clinical Bacteria / Chow Wei Chon, Wei Chon Chow

Student Works (2010-2019)

The emergence of multiple drug-resistant nosocomial pathogens affects the efficacy of chemotherapeutic treatment of infectious diseases in patients. Therefore, continuous development of new synthetic antibacterial compounds such as the synthetic peptides and Schiff base complexes to complement the current antibiotic treatment is essential. The in-vitro antibacterial activities of six synthetic cationic peptides and twenty-nine synthetic Schiff base complexes towards selected sixteen clinical strains of multiple drug-resistant methicillin-resistant Staphylococcus aureus (MRSA), Acinetobacter baumannii (AC), Klebsiella pneumoniae (KB) and Pseudomonas aeruginosa (PA) were investigated in this study. Evaluation of the antibacterial activities were determined through disk diffusion testing, broth micro-dilution assay for …

Go to article

Taxonomy Of Gelidiales In Malaysia Based On Molecular And Morphological Studies / Jelveh Sohrabipoor, Jelveh Sohrabipoor Jan 2013

Taxonomy Of Gelidiales In Malaysia Based On Molecular And Morphological Studies / Jelveh Sohrabipoor, Jelveh Sohrabipoor

Student Works (2010-2019)

The Gelidiales is an important group of red algae that serves as a source of commercial agar and agarose. This order comprises three families and ten genera, of which Gelidium, Pterocladia, Pterocladiella and Gelidiella are the main sources of high quality agar and agarose. The Gelidiales is a very complicated order and the traditional classification of the order has been changed considerably based on modern molecular studies. Peninsular Malaysia and East Malaysia with extended coastlines in the Indo-Malayan ecozone have considerable potential of seaweed resources with 396 species reported in the latest checklist of the Malaysian seaweeds. Only eight species …

Go to article

Isolation And Characterisation Of Polylactic Acid-Degrading Actinobacteria / Lim Peek Eek, Peek Eek Lim Jan 2013

Isolation And Characterisation Of Polylactic Acid-Degrading Actinobacteria / Lim Peek Eek, Peek Eek Lim

Student Works (2010-2019)

Polylactic acid (PLA) is one of the biodegradable plastics available in the market where the monomers lactic acids are joined together by ester bonds. Actinobacteria is a bacterial group with high G+C mol% and capability to produce various kinds of useful secondary substrates due to their unique metabolic pathways. In this study, soil samples from a contaminated landfill site and a non-contaminated soil at camp site were collected and screened for actinobacteria that have the ability to degrade PLA. PLA-emulsified medium, which contains only PLA as carbon source, was used as selective isolation medium to isolate PLA degraders from soil …

Go to article

First Prev Next Last