... of RHODES UNIVERSITY By NURAAN KHAN January 2005 Page 2. ... The following people have contri... more ... of RHODES UNIVERSITY By NURAAN KHAN January 2005 Page 2. ... The following people have contributed to making research at Rhodes so much fun and have my gratitude: Dr Kevin W hittington-Jones, my supervisor. Thank you for all the time and energy you invested in ...
Hyper-arid deserts present extreme challenges to life. The environmental buffering provided by qu... more Hyper-arid deserts present extreme challenges to life. The environmental buffering provided by quartz and other translucent rocks allows hypolithic microbial communities to develop on sub-soil surfaces of such rocks. These refuge communities have been reported, for many locations worldwide, to be predominantly cyanobacterial in nature. Here we report the discovery in Antarctica’s hyper-arid McMurdo Dry Valleys of three clearly distinguishable types of hypolithic community. Based on gross colonization morphology and identification of dominant taxa, we have classified hypolithic communities as Type I (cyanobacterial dominated), Type II (fungal dominated) and Type III (moss dominated). This discovery supports a growing awareness of the high biocomplexity in Antarctic deserts, emphasizes the possible importance of cryptic microbial communities in nutrient cycling and provides evidence for possible successional community processes within a cold arid landscape.
Current and previous studies on bio-based (fruit) wastes and wastewaters, with a particular empha... more Current and previous studies on bio-based (fruit) wastes and wastewaters, with a particular emphasis on research in South Africa, were reviewed. Previous studies have focused predominantly on the beneficiation and application of fruit waste as a feedstock for renewable energy. A definite gap in knowledge and application of fruit waste streams with regard to enzyme production as a value-added product is identified. The characteristics and composition of each type of fruit waste are highlighted and their potential as feedstocks in the production of value-added products is identified. The conversion of agri-industrial wastewaters to bioenergy and value-added products is discussed, with special mention of the newly published South African Bio-Economy Strategy, and the potential production of biofuels and enzymes from waste streams using recombinant Aspergillus strains. Finally, to maximise utilisation of waste streams in South Africa and abroad, a conceptual model for an integrated syst...
1 Microbiology of Antarctic Terrestrial Soils and Rocks Donald A. Cowan, Nuraan Khan, Caroline He... more 1 Microbiology of Antarctic Terrestrial Soils and Rocks Donald A. Cowan, Nuraan Khan, Caroline Heath, and Moola Mutondo CONTENTS 1.1 Introduction.................................................................. .................................... 2 1.2 Microclimate and Geochemistry of Antarctic Soils........................... ...
Abstract Peroxidases are redox enzymes that can be found in all forms of life where they play div... more Abstract Peroxidases are redox enzymes that can be found in all forms of life where they play diverse roles. It is therefore not surprising that they can also be applied in a wide range of industrial applications. Peroxidases have been extensively studied with particular emphasis on those isolated from fungi and plants. In general, peroxidases can be grouped into haem-containing and non-haem-containing peroxidases, each containing protein families that share sequence similarity.
... of RHODES UNIVERSITY By NURAAN KHAN January 2005 Page 2. ... The following people have contri... more ... of RHODES UNIVERSITY By NURAAN KHAN January 2005 Page 2. ... The following people have contributed to making research at Rhodes so much fun and have my gratitude: Dr Kevin W hittington-Jones, my supervisor. Thank you for all the time and energy you invested in ...
Hyper-arid deserts present extreme challenges to life. The environmental buffering provided by qu... more Hyper-arid deserts present extreme challenges to life. The environmental buffering provided by quartz and other translucent rocks allows hypolithic microbial communities to develop on sub-soil surfaces of such rocks. These refuge communities have been reported, for many locations worldwide, to be predominantly cyanobacterial in nature. Here we report the discovery in Antarctica’s hyper-arid McMurdo Dry Valleys of three clearly distinguishable types of hypolithic community. Based on gross colonization morphology and identification of dominant taxa, we have classified hypolithic communities as Type I (cyanobacterial dominated), Type II (fungal dominated) and Type III (moss dominated). This discovery supports a growing awareness of the high biocomplexity in Antarctic deserts, emphasizes the possible importance of cryptic microbial communities in nutrient cycling and provides evidence for possible successional community processes within a cold arid landscape.
Current and previous studies on bio-based (fruit) wastes and wastewaters, with a particular empha... more Current and previous studies on bio-based (fruit) wastes and wastewaters, with a particular emphasis on research in South Africa, were reviewed. Previous studies have focused predominantly on the beneficiation and application of fruit waste as a feedstock for renewable energy. A definite gap in knowledge and application of fruit waste streams with regard to enzyme production as a value-added product is identified. The characteristics and composition of each type of fruit waste are highlighted and their potential as feedstocks in the production of value-added products is identified. The conversion of agri-industrial wastewaters to bioenergy and value-added products is discussed, with special mention of the newly published South African Bio-Economy Strategy, and the potential production of biofuels and enzymes from waste streams using recombinant Aspergillus strains. Finally, to maximise utilisation of waste streams in South Africa and abroad, a conceptual model for an integrated syst...
1 Microbiology of Antarctic Terrestrial Soils and Rocks Donald A. Cowan, Nuraan Khan, Caroline He... more 1 Microbiology of Antarctic Terrestrial Soils and Rocks Donald A. Cowan, Nuraan Khan, Caroline Heath, and Moola Mutondo CONTENTS 1.1 Introduction.................................................................. .................................... 2 1.2 Microclimate and Geochemistry of Antarctic Soils........................... ...
Abstract Peroxidases are redox enzymes that can be found in all forms of life where they play div... more Abstract Peroxidases are redox enzymes that can be found in all forms of life where they play diverse roles. It is therefore not surprising that they can also be applied in a wide range of industrial applications. Peroxidases have been extensively studied with particular emphasis on those isolated from fungi and plants. In general, peroxidases can be grouped into haem-containing and non-haem-containing peroxidases, each containing protein families that share sequence similarity.
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