Andrew Macrae | Universidade Federal do Rio de Janeiro (UFRJ) (original) (raw)

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Papers by Andrew Macrae

Research paper thumbnail of Raw oysters can be a risk for infections

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Research paper thumbnail of Raw oysters can be a risk for infections

The Brazilian Journal of Infectious Diseases, 2010

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Research paper thumbnail of Tropical Soil Microbial Communities

The Prokaryotes, 2013

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Research paper thumbnail of Atrazine sorption and fate in a Ultisol from humid tropical Brazil

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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Research paper thumbnail of Peptone preparation from fishing by-products

Journal of The Science of Food and Agriculture, 2005

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Research paper thumbnail of Biodegradation of feather waste by extracellular keratinases and gelatinases from Bacillus spp

World Journal of Microbiology and Biotechnology, 2011

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Research paper thumbnail of Identification of a Candida parapsilosis Strain Producing Extracellular Serine Peptidase with Keratinolytic Activity

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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Research paper thumbnail of The impact of shrimp farming effluent on bacterial communities in mangrove waters, Ceará, Brazil

Marine Pollution Bulletin, 2006

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Research paper thumbnail of Use of rpoB and 16S rRNA genes to analyse bacterial diversity of a tropical soil using PCR and DGGE

Letters in Applied Microbiology, 2002

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Research paper thumbnail of Atrazine leaching through surface and subsurface of a tropical Oxisol

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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Research paper thumbnail of Characterization of Aeromonas species isolated from an estuarine environment

Brazilian Journal of Microbiology, 2010

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Research paper thumbnail of Killer yeasts inhibit the growth of the phytopathogen Moniliophthora perniciosa, the causal agent of Witches' Broom disease

Brazilian Journal of Microbiology, 2009

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Research paper thumbnail of Chemical and microbiological characterization of mangrove sediments after a large oil-spill in Guanabara Bay - RJ - Brazil

Brazilian Journal of Microbiology, 2006

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Research paper thumbnail of Cellulase Production by Streptomyces viridobrunneus SCPE-09 Using Lignocellulosic Biomass as Inducer Substrate

Applied Biochemistry and Biotechnology, 2011

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Research paper thumbnail of Candida middelhoveniana sp. nov., a new yeast species found on the rhizoplane of organically cultivated sugarcane

Antonie van Leeuwenhoek, 2011

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Research paper thumbnail of Peptidase profiles from non- albicans Candida spp. isolated from the blood of a patient with chronic myeloid leukemia and another with sickle cell disease

FEMS Yeast Research, 2007

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Research paper thumbnail of Raw oysters can be a risk for infections

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Research paper thumbnail of Raw oysters can be a risk for infections

The Brazilian Journal of Infectious Diseases, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Tropical Soil Microbial Communities

The Prokaryotes, 2013

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Atrazine sorption and fate in a Ultisol from humid tropical Brazil

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

Research paper thumbnail of Peptone preparation from fishing by-products

Journal of The Science of Food and Agriculture, 2005

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Biodegradation of feather waste by extracellular keratinases and gelatinases from Bacillus spp

World Journal of Microbiology and Biotechnology, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Identification of a Candida parapsilosis Strain Producing Extracellular Serine Peptidase with Keratinolytic Activity

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

Research paper thumbnail of The impact of shrimp farming effluent on bacterial communities in mangrove waters, Ceará, Brazil

Marine Pollution Bulletin, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Use of rpoB and 16S rRNA genes to analyse bacterial diversity of a tropical soil using PCR and DGGE

Letters in Applied Microbiology, 2002

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Atrazine leaching through surface and subsurface of a tropical Oxisol

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

Research paper thumbnail of Characterization of Aeromonas species isolated from an estuarine environment

Brazilian Journal of Microbiology, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Killer yeasts inhibit the growth of the phytopathogen Moniliophthora perniciosa, the causal agent of Witches' Broom disease

Brazilian Journal of Microbiology, 2009

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Chemical and microbiological characterization of mangrove sediments after a large oil-spill in Guanabara Bay - RJ - Brazil

Brazilian Journal of Microbiology, 2006

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Cellulase Production by Streptomyces viridobrunneus SCPE-09 Using Lignocellulosic Biomass as Inducer Substrate

Applied Biochemistry and Biotechnology, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Candida middelhoveniana sp. nov., a new yeast species found on the rhizoplane of organically cultivated sugarcane

Antonie van Leeuwenhoek, 2011

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Peptidase profiles from non- albicans Candida spp. isolated from the blood of a patient with chronic myeloid leukemia and another with sickle cell disease

FEMS Yeast Research, 2007

Bookmarks Related papers MentionsView impact

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