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Environmental Microbiology and Microbial Ecology Commons™
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- Aptasensor; Foodborne pathogen; Reduced graphene oxide; rGO-nanocomposite; S. Typhimurium (1)
- Aurantiochytrium sp.; Biomass; Biodiesel; Response surface methodology; Submerged-liquid fermentation (1)
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Articles 1 - 26 of 26
Full-Text Articles in Environmental Microbiology and Microbial Ecology
Isolated Bacillus Licheniformis Sp01 From Daqing Oilfield In Reducing Chromium(Iii) Crosslinked Polymer Residue And Enhancing Oil Recovery, Xiao Hui
Student Works (2020-2029)
After polymer gel formation, the residual partially hydrolyzed polyacrylamide (HPAM) and the crosslinker (Cr3+) caused plugging and decreased oil recovery. Microorganisms can degrade HPAM to address the issues, but Cr³⁺ inhibits the process and reduces oil recovery. This study explores the underexamined biodegradation of HPAM and improved oil recovery in the presence of Cr³⁺, offering new perspectives for microbial enhanced oil recovery (MEOR) after polymer gel formation. HPAM and crude oil were innovatively used as the sole nitrogen(N) and carbon(C) sources to isolate the best-growing strain from Daqing Oilfield produced water, identified as Bacillus licheniformis SP01. The oil displacement potential …
Cat Flea Infestation, Evolution And Endosymbionts, And Community Awareness Towards Fleas And Flea-Borne Diseases, Noor Azrizal Abdul Wahid
Cat Flea Infestation, Evolution And Endosymbionts, And Community Awareness Towards Fleas And Flea-Borne Diseases, Noor Azrizal Abdul Wahid
Student Works (2020-2029)
The cat flea Ctenocephalides felis is the cosmopolitan ectoparasite infesting cats. Occurrence of this flea on cats has led to several disease problems resulted from its ectoparasitic activity and associated pathogens. For prevention measure, study on its prevalence and genetic structure can help in identifying the infestation risk factors and its vectorial capability. In this study, infestation survey indicated overall high prevalence (71.8 %) of C. felis on cats sampled from four different regions in Peninsular Malaysia and the prevalence was associated (p < 0.05) with several risk factors including age, body weight, hair length, body condition and status of the cats. Among the regions, infestation rate was significantly highest on cat population in western region (28.9 %). Moreover, an assessment of knowledge, attitudes and practices (KAP) among cat owners showed possession of moderate level for knowledge on fleas and relatively low level for knowledge on flea-borne diseases. However, there were positive attitudes and good practices shown by the community in regard to prevention measures. Principle Component Analysis of KAP level, nevertheless, did not exert any variability among the respondents from different regions. Furthermore, analysis of cat flea mtDNA inferred from barcoding genes (cox1 and cox2) showed genetic variations between the four regions with western demonstrated the highest genetic diversity (Hd = 0.7833, Pi = 0.0127, Nh = 9). However, in overall, this study observed low nucleotide and haplotype diversities, indicating high homogeneity in genetic content among flea populations resulted from high gene flow. There were 15 haplotype numbers (AB1 – AB15) revealed in cat flea populations in Malaysia. Global comparison, however, indicated that Malaysian cat fleas had limited geographical distribution within Southeast Asian region while had genetic proximity with population from tropical region. Analyses of endosymbiont bacteria showed that cat fleas in Peninsular Malaysia carry Bartonella and Rickettsia bacteria with 28 % of flea samples were positive for Bartonella DNA and 14 % for Rickettsia DNA. Meanwhile, the tested flea populations were negative for Mycoplasma infection. Three Bartonella species were recorded including B. clarridgeiae, B. hensalae and the first record in Malaysia, B. koehlerae. Meanwhile, Rickettsia asembonensis was the only rickettsial bacteria identified in the present study. Statistical analyses revealed no association on the bacterial infection towards the mtDNA diversity of the cat fleas. However, in overall pathogen infection, infected population demonstrated lower haplotype and nucleotide diversities and showed lower number of haplotypes. Ultimately, the finding from this study will be beneficial in flea management and control program related to veterinary practices by providing insights on flea infestation, community awareness, evolution and its associated pathogens. The present findings highlighted the need for ongoing public health programs, given the relatively low possession of flea related knowledge among cat owners, and high infection rates of pathogens in cat flea populations in Peninsular Malaysia.
Assessment Of Bacterial Community Structure And Characterisation Of Novel Bacterial Species In Weaver Ants Oecophylla Smaragdina, Chua Kah Ooi
Student Works (2020-2029)
The Asian weaver ant, Oecophylla smaragdina has major workers that exhibit strong territorial behaviour and are aggressive predator of other arthropods. This makes them an effective biocontrol agent against many agricultural-important insect pests. Despite its importance in pest management, microbiome information of O. smaragdina is limited. In this study, the bacterial microbiome of O. smaragdina was characterized using 16S rRNA gene amplicon sequencing. Across all 12 samples, 97.8% of the sequences constituted 16 major operational taxonomic units (OTUs) that were assigned to eight bacterial families. The core bacterial microbiome was dominated by families Acetobacteraceae and Lactobacillaceae. Spatial variation attributed to …
Evaluation Of Anti-Cancer Function In Natural Killer Cells Generated From Rat Hematopoietic Stem Cells, Alireza Pirahmadian
Evaluation Of Anti-Cancer Function In Natural Killer Cells Generated From Rat Hematopoietic Stem Cells, Alireza Pirahmadian
Student Works (2020-2029)
Natural killer cells (NK) cells are lymphocytes and they are the most important key constituent of mammalian immune system against cancer tumour cells. The genome of NK cells is categorically divided to inhibitory and activator genes that code ligands on the surface of NK cells. Indeed, these ligands are cancer tumour cells destroyer arms of the NK cells. On the other hand, hematopoietic stem cells (HSCs) are the origin of all blood cells, derives from BM and mature to immune cells. NK cells cannot defeat CTCs on their own. The main reason is their population (numbers are low), they cannot …
Graphene-Based Electrochemical Aptasensor For The Detection Of Salmonella Typhimurium, Shalini Muniandy
Graphene-Based Electrochemical Aptasensor For The Detection Of Salmonella Typhimurium, Shalini Muniandy
Student Works (2020-2029)
Recent foodborne outbreaks in multiple locations necessitate the continuous development of highly sensitive and specific biosensors that offer rapid and sensitive detection of foodborne pathogens. The emergence of electrochemical aptasensor which is a compact analytical device with a combination of an aptamer as the biorecognition element integrated on the transducer surface created a breakthrough in the detection of foodborne bacterial pathogens. Graphene has emerged as a promising nanomaterial for reliable detection of pathogenic bacteria due to its exceptional properties such as high electrical conductivity, large surface to volume ratio, high mechanical strength and its unique interactions with DNA bases of …
Molecular Characterisation Of Hsp70 Gene Expression, Histopathology And Immune System Of Snakehead Fish, Channa Striata, Under Temperature And Bacterial Stress, Eid Elhussein Ihlam Ibrahim
Molecular Characterisation Of Hsp70 Gene Expression, Histopathology And Immune System Of Snakehead Fish, Channa Striata, Under Temperature And Bacterial Stress, Eid Elhussein Ihlam Ibrahim
Student Works (2020-2029)
Snakeheads are air-breathing freshwater fishes containing two genera, Channa (Asia) and Parachanna (Africa). The Asian genus is dominated by Channa striata which is found in southern and Southeastern parts of the continent. In this research, environmental and bacteria stressor to Channa striata were investigated. HSP70 gene was studied as an environmental stress gene (ChHSP70). Results showed a cDNA sequence of the gene to be (~918bp). It was also shown the gene is highly similar to that of other fish species. Constructing a phylogenetic tree of the gene across vertebrate species revealed six main clusters; same class remained conserved by showing …
Optimisation Of Biomass And Lipid Production Of A Tropical Thraustochytrid Aurantiochytrium Sp. Umacc-T023 In Submerged-Liquid Fermentation For Large-Scale Biodiesel Production, Sohedein Mohamad Nor Azzimi
Optimisation Of Biomass And Lipid Production Of A Tropical Thraustochytrid Aurantiochytrium Sp. Umacc-T023 In Submerged-Liquid Fermentation For Large-Scale Biodiesel Production, Sohedein Mohamad Nor Azzimi
Student Works (2020-2029)
A tropical thraustochytrid, Aurantiochytrium sp. UMACC-T023, was optimised for high biomass and lipid production in submerged-liquid fermentation (SLF). Biomass and lipid production were optimised based on glucose, polypeptone, and yeast extract concentration using response surface methodology (RSM). In RSM, the applied central composite design (CCD) showed that the optimisation model was significant for all variables studied. Yeast extract and polypeptone were associated with significant effects in UMACC-T023 biomass production with p < 0.05. The model was validated by employing the optimised media composition in shake flasks and in 1.4-L stirred-tank bioreactors. The optimised media composition for both biomass and lipid production was 10 g L-1 glucose, 15.08 g L-1 polypeptone, and 13.56 g L-1 yeast extract. Biomass production in the bioreactor increased 2.12-fold compared with the shake flask culture utilising the same optimised media composition. This result demonstrated that the optimized media composition can be utilised for large-scale lipid production of UMACC-T023 for potential biodiesel feedstock as it also fulfilled the international standards for biodiesel.
Polyhydroxyalkanoates For Innovative Electrodes And Proton Exchange Membrane Modification In Microbial Fuel Cell, Abdul Azeez Olayiwola Sirajudeen
Polyhydroxyalkanoates For Innovative Electrodes And Proton Exchange Membrane Modification In Microbial Fuel Cell, Abdul Azeez Olayiwola Sirajudeen
Student Works (2020-2029)
The increase in global energy demand due to increasing population and industrialization demands renewable and environmental-friendly alternatives. Energy from fossil fuel are non-renewable, depleting and detrimental from environmental perspectives. Alternative energy, green and renewable such as hydrogen fuel, biodiesel, bioethanol, microbial fuel cell and many more have been extensively investigated. One possible solution lies with non-combustion method such as microbial fuel cell. A microbial fuel cell is a sustainable and environmental-friendly device that combines electricity generation and wastewater treatment through metabolic activities of microorganisms. However, low power output from inadequate electron transfer to the anode electrode hampers its practical implementation. …
Isolation Of Plastic-Degrading Fungi From Landfill And Determining The Selected Plastics Biodegradation Capability, Mohan Priya
Isolation Of Plastic-Degrading Fungi From Landfill And Determining The Selected Plastics Biodegradation Capability, Mohan Priya
Student Works (2020-2029)
Polyethylene Terephthalate (PET), Low Density Polyethylene (LDPE) and High Density Polyethylene (HDPE) are the most important polymers used predominantly in present world. Since synthetic polymers hardly undergo degradation and remain in the environment for a very long time, up to 1000 years, these drawbacks increase the percentage of solid wastes in landfill and threaten the environment. To date, Municipal Solid Waste (MSW) landfill is the most favored disposal method especially among the developing countries. The aim of present study is to evaluate the potential of fungus isolated from landfilled plastics to degrade PET, LDPE and HDPE. Besides, effect of different …
Abundance And Distribution Of Microplastics And Phthalic Acid Esters In Selected Mangrove Areas In Peninsular Malaysia, Anuar Norkhairah
Abundance And Distribution Of Microplastics And Phthalic Acid Esters In Selected Mangrove Areas In Peninsular Malaysia, Anuar Norkhairah
Student Works (2020-2029)
Contamination of microplastics in mangrove has been receiving growing attention as experts reckon 30 billion tonnes of plastics will accumulate in 2050. The vast increase in plastic commodities will increase microplastics abundance in mangroves as mangroves are substantially sinks and traps for plastic debris. Due to persistent properties and high surface to volume ratio of microplastics, Phthalic Acid Esters (PAEs) can be taken up by microplastics, representing a grave threat to the ecosystems. This study investigated the abundance and distribution of microplastics and PAEs in selected mangrove areas in Peninsular Malaysia. The objectives of this study are to identify the …
Comparison Of Three Analytical Techniques For General Characterisation Of Selected Algae And Cyanobacteria, Mohamed Iqbal Suhaina Nashath
Comparison Of Three Analytical Techniques For General Characterisation Of Selected Algae And Cyanobacteria, Mohamed Iqbal Suhaina Nashath
Student Works (2020-2029)
Algae and cyanobacteria maintain the oxygenation of earth, and are utilised as biofuels, biofertilizers and nutrition feed. The characterisation of algae and cyanobacteria through conventional methods require technical expertise, laborious sample preparation, and moderately expensive instruments and reagents. Hence, in this study, selected bioanalytical techniques with minimal sample preparation were incorporated, to simplify the characterisation of algae and cyanobacteria. The objectives of this research were to study the phylogenetic relationship of the selected algae and cyanobacteria via the 23S plastid ribosomal ribonucleic acid (rRNA) and 18S rRNA biomarkers; to validate the presence of the microcystin synthetase (mcy) gene cluster encoding …
Abundance And Distribution Of Microplastics And Persistent Organic Pollutants In Selected Rivers Of Peninsular Malaysia, Anuar Norkhairiyah
Abundance And Distribution Of Microplastics And Persistent Organic Pollutants In Selected Rivers Of Peninsular Malaysia, Anuar Norkhairiyah
Student Works (2020-2029)
Nearly 70 to 80 percent of microplastics are believed to be transported to the sea through rivers. Yet, less attention has been given to the accumulation of microplastics in the freshwater environment. They are emerging anthropogenic contaminants on account of their potential to adsorb and/or release POPs from and/or to the surrounding environment, and become the vector transferring these pollutants from water to the food web. This study is aimed to explore the abundance and distribution of microplastics and POPs in six rivers of Peninsular Malaysia, which comprised of three rivers from the West Coast (Sepetang River, Serkam River, and …
Hydrolysis Of Palm Oil Mill Effluent Using Enzymes From Spent Mushroom Substrate Of Pleurotus Pulmonarius (Fr.) Quel, Mat Yunan Nurul Anisa
Hydrolysis Of Palm Oil Mill Effluent Using Enzymes From Spent Mushroom Substrate Of Pleurotus Pulmonarius (Fr.) Quel, Mat Yunan Nurul Anisa
Student Works (2020-2029)
Mushroom cultivation and palm oil industry in Malaysia have contributed to the large volumes of lignocellulosic residues. Lignocellulolytic enzymes profiles (lignin peroxidase, laccase, xylanase, endoglucanase, and β-glucosidase) of Pleurotus pulmonarius (parents strains UMP001 and UMP 002, and the hybrid UMH004) during growth in sawdust substrate bags were investigated. The enzymes extracted from the spent mushroom substrate (SMS) of the strain with the highest enzymes productivity was used to hydrolyse palm oil mill effluent (POME). Optimization of parameters for POME hydrolysis to release reducing sugar was conducted using central composite design (CCD) of response surface methodology (RSM). The potential of hydrolysed …
Genomic And Taxonomic Studies Of An Antarctic Psychrotolerant Quorum Quenching Bacterium, Planococcus Versutus L10.15t, See-Too Wah Seng
Genomic And Taxonomic Studies Of An Antarctic Psychrotolerant Quorum Quenching Bacterium, Planococcus Versutus L10.15t, See-Too Wah Seng
Student Works (2020-2029)
Quorum quenching (QQ) has been suggested as an alternative to antibiotic treatments for pathogenic infections as it does not affect the viability of the pathogen and imposes minimum selection pressure promoting drug resistance. During an ecological survey for quorum quenching (QQ) bacteria from soil collected in Lagoon Island (Ryder Bay, Adelaide Island, Antarctica), a bacterial strain was isolated and identified as Planococcus species, L10.15T, based on 16S rRNA gene analysis. The genomic, phylogenetic, chemotaxonomic and phenotypic data obtained showed that L10.15T represents a novel species for which the name Planococcus versutus sp. nov. is proposed. Previously, QQ activity of L10.15T …
Morphology, Molecular Characterization And Habitat Preference Of Harmful Benthic Dinoflagellate Gambierdiscus (Dinophyceae) In Malaysia, Nurin Izzati Mustapa
Morphology, Molecular Characterization And Habitat Preference Of Harmful Benthic Dinoflagellate Gambierdiscus (Dinophyceae) In Malaysia, Nurin Izzati Mustapa
Student Works (2020-2029)
Ciguatera fish poisoning (CFP) is a type of illness that causes human intoxication after consuming contaminated coral fishes. The neurotoxins, ciguatoxins, are produced by species of Gambierdiscus, one of the harmful benthic dinoflagellates. Identification of harmful dinoflagellate species is important to gain further insights into the global dispersion. In this study, morphological characteristics of species in the genus Gambierdiscus and their habitat preferences were investigated. Field sampling was undertaken at Pulau Rawa, Terengganu and Pulau Sibu, Johor. Single cells of Gambierdiscus were isolated and clonal cultures were established. Morphology of Gambierdiscus was examined by using light and scanning electron microscopes. …
Molecular Characterisation Of Soil Bacteria Degrading Pseudomonas Quinolone Signal., Ye Chen Soh
Molecular Characterisation Of Soil Bacteria Degrading Pseudomonas Quinolone Signal., Ye Chen Soh
Student Works (2010-2019)
A different class of quorum sensing (QS) signal molecules, known as 2-alkyl-4- quinolones (AQs) have been discovered in Pseudomonas aeruginosa. The Pseudomonas Quinolone Signal (PQS) is arguably the most important QS signal in this signalling cascade, playing a vital role in regulating a myriad of virulence factors. A novel chemically defined medium with PQS as the sole carbon and energy source was developed and used in the successful enrichment and isolation of a PQS-degrading bacterium from rain forest soil samples. Based on 16S rDNA sequence analysis, the bacterium was classified as a strain of Achromobacter xylosoxidans. The PQS degradation activity …
Antimicrobial Activity Of Selected Fungi Isolated From Dee And Barrientos Islands, Antarctica., Shamia Mohamedain Abd Elgadir Younis
Antimicrobial Activity Of Selected Fungi Isolated From Dee And Barrientos Islands, Antarctica., Shamia Mohamedain Abd Elgadir Younis
Student Works (2010-2019)
This study reports the screening of selected fungi isolated from Dee and Barrientos Islands, Antarctica, for their antimicrobial activities using two methods: a) plug assay method and b) disk diffusion method. The plug assay was carried out as preliminary screening forbiological activity against bacteria: Bacillus subtilis, Staphylococcus aureus,Escherichia coli, pseudomonas aeruginosa, and yeast: Candida albicans. The results showed that 35% from species possessed antibacterial activity; and these included: Geomyces sp.50-1/S7, Unidentified 75-1/S1, Geomyces sp.12-1/S21, Penecillium sp.75-1/S10, Geomyces sp.3-1/S5, Geomyces sp.3-4/S5 and Geomyces sp.146/S5. Most of the strains exhibited antibacterial activity against Gram-positive bacteria S. aureus and B. subtilis …
Analysis Of Bacterial Diversity In Arctic Soil And Sediment Samples From Ny-Alesund, Norway Using Denaturing Gradient Gel Electrophoresis., Yew Wen Chyin
Student Works (2010-2019)
Bacterial diversity in soil and sediment samples from eighteen sites in and around Dasan Station, Ny-Ålesund, Norway was analyzed using Denaturing Gradient Gel Electrophoresis (DGGE), and was correlated with the environmental variables. Samples analysed included terrestrial soils, beach soil, periglacier soils, inland lake bank sediments, melt lake sediments, and marine sediments. Spearman rank order correlation showed significant correlations (P = 0.001) between conductivity (r = 0.470) and pH (r = 0.294) with the bacterial diversity. Soil from the tundra site (sample 17) appeared to have the most diverse bacterial community while inland lake bank sediment from the …
Isolation And Characterization Of Bacteria From Extended Aeration Wastewater Treatment Plants., Randy Chin Kok Fei
Isolation And Characterization Of Bacteria From Extended Aeration Wastewater Treatment Plants., Randy Chin Kok Fei
Student Works (2010-2019)
In this study, three different wastewater treatment plants (STP1, STP2 and STP3) were sampled in Klang Valley. STP1 exhibited the best activated sludge health with healthy Sludge Volume (SV), Mixed Liquor Suspended Solids (MLSS) and Mixed Liquor Volatile Suspended Solids (MLVSS). STP2 were constantly disrupted by the mechanical failures which caused its dissolved oxygen (DO) to decrease whereas STP3 was troubled by the inadequate alkalinity in its mixed liquor causing acidic condition in aeration tank. The acidic condition resulted in pin-floc problem and contributed to high Total Suspended Solids (TSS) and low SV. Influent at STP3 was also found to …
Antimicrobial Potential Of Selected Actinomycetes Isolated From The Marine Ecosystem., Nur Rahimatul Hayati Abdul Rahman
Antimicrobial Potential Of Selected Actinomycetes Isolated From The Marine Ecosystem., Nur Rahimatul Hayati Abdul Rahman
Student Works (2010-2019)
Actinomycetes are widespread in marine ecosystem. They are of interest in research field as they are capable to produce bioactive secondary metabolites which can be developed into useful pharmaceutical products. An example of the product is antibiotics which can be used to treat infectious diseases. The potential of antibacterial and antifungal activity of eleven marine derived actinomycetes from the genus Streptomyces were studied. They were tested against bacteria Enterobacter faecalis, Staphylococcus aureus, Bacillus subtilis, Pleisiomonas shigelloides and Pseudomonas aeruginosa and fungi Candida parapsilosis and Candida albicans. Primary screening by the cross streak method and secondary screening by diffusion using paper …
Microbial Quorum Quenching Activities In Marine Water, Wetland Water, And Rainforest Soil., Wong Cheng Siang
Microbial Quorum Quenching Activities In Marine Water, Wetland Water, And Rainforest Soil., Wong Cheng Siang
Student Works (2010-2019)
Quorum sensing refers to the bacterial cell-to-cell communication phenomenon that is employed to regulate a wide range of activities in a variety of bacteria. One of the most extensively studied mechanisms is that of Gram-negative bacteria utilizing N-acyl homoserine lactone as the signaling molecule. Quorum quenching on the other hand refers to the interference of quorum sensing, that can be achieved by, inter alia, directly inactivating the signaling molecule, and thus preventing the expression of certain genes, notably those regulating virulence. This study aimed to isolate N-acyl homoserine lactone-degrading microorganisms from Malaysian marine water, wetland water, and rainforest soil using …
Response Surface Optimization Of Crystal Violet Decolorization By Pellets Of Pyncnoporus Sanguineus., Siti Suhana Sulaiman
Response Surface Optimization Of Crystal Violet Decolorization By Pellets Of Pyncnoporus Sanguineus., Siti Suhana Sulaiman
Student Works (2010-2019)
Ligninolytic enzymes of white-rot fungi have broad specificities and have been implicated in transformation and mineralization of organo-pollutant with chemical structure similar to lignin e.g. synthetic dyes. This study was carried out to optimize selected parameters for decolorization of Crystal violet by Pycnoporus sanguineus in shake flasks. The parameters studied were initial dye concentration (ppm), agitation speed (rpm) and process time. They were optimized using response surface methodology (RSM). Subsequent to the optimization, the decolorization process was scaled up in stirred tank reactor (STR). Effect of different geometry of impellers on the decolorization process was studied. Curved blade and angled …
Isolation And Characterization Of Actinobacteria From Soil Samples Of Signy Island, Antarctica., Pan Shing Yi
Isolation And Characterization Of Actinobacteria From Soil Samples Of Signy Island, Antarctica., Pan Shing Yi
Student Works (2010-2019)
In this study, ninety five actinobacterial isolates were cultured from seven soils samples collected on Signy Island, maritime Antarctica. Nine different isolation media were used and the isolates plates were incubated at 15ºC for up to four months. SCN agar serves as the better media for the isolation of actinobacteria. Presence of actinobacteria in the soil samples was also detected using PCR with actinobacteria specific primers. The actinobacterial isolates were characterized based on morphology (Gram-stain, coverslip examination, colour grouping), analysis of DAP isomers, antibacterial activities and by molecular methods (ARDRA, analysis of 16S rRNA sequence and detection of NRPS gene). …
Biodiversity And Antimicrobial Activity Of Cold-Adapted Soil Microfungi From: Deception Island, Wilhelmina Bay And Yankee Bay, Maritime Antarctica., Mohammed Ahmed Mohammed Abneuf
Biodiversity And Antimicrobial Activity Of Cold-Adapted Soil Microfungi From: Deception Island, Wilhelmina Bay And Yankee Bay, Maritime Antarctica., Mohammed Ahmed Mohammed Abneuf
Student Works (2010-2019)
Decades ago, the Antarctic regions have been exploited for cold-tolerant microorganisms, prospecting various biological benefits, mainly psychrophilic enzymes and bioactive compounds. The first half of the present research aimed to study the occurrence of microfungi in samples of soil taken from Deception Island, Wilhelmina Bay and Yankee Bay, Maritime Antarctica. Attempt made to screen the biodiversity using conventional media and soil plating technique, yielded population of 27 species from the total of 14 soil samples. Of that, 13 fungal species were recorded from Deception Island, 8 from Wilhelmina Bay and 6 from Yankee Bay. Among the genera were Aspergillus, …
Enzyme Profiles Of Pycnoporus Sanguineus Growing In Solid Substrate Fermentation On Selected Agro-Residues, Renuvathani Madavan
Enzyme Profiles Of Pycnoporus Sanguineus Growing In Solid Substrate Fermentation On Selected Agro-Residues, Renuvathani Madavan
Student Works (2000-2009)
A comparative study was done for solid substrate fermentation (SSF) of sago 'hampas', oil palm frond parenchyma tissue (OPFPI) and rubberwood sawdust with a white-rot fungus, Pycnoporus sanguineous for enzyme production. Xylanase, laccase and cellulase productivity was assayed during degradation. Excellent growth of Pycnoporus sanguineous was observed for all the substrates studied over a 21 day time-course fermentation. Laccase productivity was highest during degradation of sago 'hampas' and OPFPI ranging from 7.4-7.6 U/g substrate on 1111 day of fermentation compared to rubberwood sawdust with a maximum laccase of 5.7 U/g substrate on day 11 of SSF. Xylanase productivity recorded highest …
Bioaccumulation And Toxicity Studies Of Heavy Metals In Ankistrodesmus Convolutus Corda, Samina Hussin
Bioaccumulation And Toxicity Studies Of Heavy Metals In Ankistrodesmus Convolutus Corda, Samina Hussin
Student Works (2000-2009)
Nine freshwater microalgal species of Malaysia, Chlorella vulgaris (isolate 001). Scenedesmus sp. (isolate 039), Moug,wlia sp. (isolate 069). l llothrix sp. (isolate 071). Ch/ore/la sp. (isolate 078), Ankistrodf!snms co11vo/11tus (isolate IO I), Chlorococuum sp. (isolate 110), Synechococcus sp. (isolate 075). Euglena sp. (isolate 058), and including two species Oocystis polymorpha UTEX 1645 (isolate 169) and Ankistrodesmus arcuatus UTEX LB 1379 (isolate 170) from the UTEX Collection, Texas, were used in 96 h single heavy metal (Cd, Co, Cr. Cu, Fe, Mn and Zn) exposure static studies for preliminary toxicity test. This was done by incubating the microalgae in a range …