Andrew Macrae | Universidade Federal do Rio de Janeiro (UFRJ) (original) (raw)
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Papers by Andrew Macrae
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The Brazilian Journal of Infectious Diseases, 2010
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The Prokaryotes, 2013
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Chemosphere, 2007
This study combined laboratory based microcosm systems as well as field experiments to evaluate t... more This study combined laboratory based microcosm systems as well as field experiments to evaluate the mobility of atrazine on a Ultisol under humid tropical conditions in Brazil. Results from sorption experiments fit to the Freundlich isotherm model [Kf 0.99mgkg−1/(mgl−1)1/n], and indicate a low sorption capacity for atrazine in this soil and consequently large potential for movement by leaching and runoff.
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Journal of The Science of Food and Agriculture, 2005
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World Journal of Microbiology and Biotechnology, 2011
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Mycopathologia, 2010
A yeast strain isolated from feather waste from a chicken processing plant was identified as Cand... more A yeast strain isolated from feather waste from a chicken processing plant was identified as Candida parapsilosis by biochemical tests and morphological studies. The yeast was able to grow in phosphate-buffered saline supplemented with 1% native feather as the sole carbon and nitrogen source. A keratin substrate was obtained from the feathers by dimethylsulphoxide extraction. A 20-fold concentrated culture supernatant from Candida parapsilosis grown on feathers was analysed by SDS-PAGE electrophoresis containing either 1% gelatin or 1% keratin as copolymerised substrates. The presence of a single band with an approximate molecular mass of 60 kDa with gelatinolytic and keratinolytic activities was observed. This proteolytic activity was fully inhibited by phenylmethylsulphonyl fluoride. These results suggest that the extracellular enzyme belongs to the serine peptidase class. This is the first report of an extracellular serine peptidase produced by C. parapsilosis with keratinolytic activity. The role of this enzyme in yeast-host interactions is discussed.
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Marine Pollution Bulletin, 2006
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Letters in Applied Microbiology, 2002
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Journal of Environmental Science and Health, Part B, 2008
The fate of (14)C atrazine was investigated using microcosms and an undisturbed Red-Yellow Latoss... more The fate of (14)C atrazine was investigated using microcosms and an undisturbed Red-Yellow Latossol (Oxisol) under simulated rainfall conditions of 200 mm water month(-1). Experiments were carried out using microcosm cores, the first with an uncovered surface soil; the second set with uncovered subsurface soil; the third with subsurface soil covered with 3 cm of cow manure and the last with subsurface soil covered with 5 cm of grass straw. Average values for the amount of atrazine leached after 60 days were as follows: surface soil 1.6%; subsurface 47.3%; subsurface plus manure 17.3% and subsurface plus straw 24.8%. In the surface soil, 53% of the (14)C atrazine remained within the upper 1 cm, while in the subsurface microcosms the atrazine was more evenly distributed. The authors report that surface soil was retained atrazine and its metabolites for 60 days. The addition of a straw or manure covering to exposed subsoil helped to retard atrazine leaching.
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Brazilian Journal of Microbiology, 2010
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Brazilian Journal of Microbiology, 2009
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Brazilian Journal of Microbiology, 2006
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Applied Biochemistry and Biotechnology, 2011
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Antonie van Leeuwenhoek, 2011
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FEMS Yeast Research, 2007
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Bookmarks Related papers MentionsView impact
The Brazilian Journal of Infectious Diseases, 2010
Bookmarks Related papers MentionsView impact
The Prokaryotes, 2013
Bookmarks Related papers MentionsView impact
Chemosphere, 2007
This study combined laboratory based microcosm systems as well as field experiments to evaluate t... more This study combined laboratory based microcosm systems as well as field experiments to evaluate the mobility of atrazine on a Ultisol under humid tropical conditions in Brazil. Results from sorption experiments fit to the Freundlich isotherm model [Kf 0.99mgkg−1/(mgl−1)1/n], and indicate a low sorption capacity for atrazine in this soil and consequently large potential for movement by leaching and runoff.
Bookmarks Related papers MentionsView impact
Journal of The Science of Food and Agriculture, 2005
Bookmarks Related papers MentionsView impact
World Journal of Microbiology and Biotechnology, 2011
Bookmarks Related papers MentionsView impact
Mycopathologia, 2010
A yeast strain isolated from feather waste from a chicken processing plant was identified as Cand... more A yeast strain isolated from feather waste from a chicken processing plant was identified as Candida parapsilosis by biochemical tests and morphological studies. The yeast was able to grow in phosphate-buffered saline supplemented with 1% native feather as the sole carbon and nitrogen source. A keratin substrate was obtained from the feathers by dimethylsulphoxide extraction. A 20-fold concentrated culture supernatant from Candida parapsilosis grown on feathers was analysed by SDS-PAGE electrophoresis containing either 1% gelatin or 1% keratin as copolymerised substrates. The presence of a single band with an approximate molecular mass of 60 kDa with gelatinolytic and keratinolytic activities was observed. This proteolytic activity was fully inhibited by phenylmethylsulphonyl fluoride. These results suggest that the extracellular enzyme belongs to the serine peptidase class. This is the first report of an extracellular serine peptidase produced by C. parapsilosis with keratinolytic activity. The role of this enzyme in yeast-host interactions is discussed.
Bookmarks Related papers MentionsView impact
Marine Pollution Bulletin, 2006
Bookmarks Related papers MentionsView impact
Letters in Applied Microbiology, 2002
Bookmarks Related papers MentionsView impact
Journal of Environmental Science and Health, Part B, 2008
The fate of (14)C atrazine was investigated using microcosms and an undisturbed Red-Yellow Latoss... more The fate of (14)C atrazine was investigated using microcosms and an undisturbed Red-Yellow Latossol (Oxisol) under simulated rainfall conditions of 200 mm water month(-1). Experiments were carried out using microcosm cores, the first with an uncovered surface soil; the second set with uncovered subsurface soil; the third with subsurface soil covered with 3 cm of cow manure and the last with subsurface soil covered with 5 cm of grass straw. Average values for the amount of atrazine leached after 60 days were as follows: surface soil 1.6%; subsurface 47.3%; subsurface plus manure 17.3% and subsurface plus straw 24.8%. In the surface soil, 53% of the (14)C atrazine remained within the upper 1 cm, while in the subsurface microcosms the atrazine was more evenly distributed. The authors report that surface soil was retained atrazine and its metabolites for 60 days. The addition of a straw or manure covering to exposed subsoil helped to retard atrazine leaching.
Bookmarks Related papers MentionsView impact
Brazilian Journal of Microbiology, 2010
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Brazilian Journal of Microbiology, 2009
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Brazilian Journal of Microbiology, 2006
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Applied Biochemistry and Biotechnology, 2011
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Antonie van Leeuwenhoek, 2011
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FEMS Yeast Research, 2007
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