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Microbial exopolymers link predator and prey in a model yeast biofilm system.
Joubert LM, Wolfaardt GM, Botha A. Joubert LM, et al. Among authors: botha a. Microb Ecol. 2006 Aug;52(2):187-97. doi: 10.1007/s00248-006-9063-7. Epub 2006 Aug 8. Microb Ecol. 2006. PMID: 16897306
Contrary to the widely held assumption that protistan feeding primarily involves ingestion of biofilm cells, with negative consequences for the biofilm, this study demonstrated preferential grazing on the noncellular biofilm matrix by a ciliate, with selective ingestion of …
Contrary to the widely held assumption that protistan feeding primarily involves ingestion of biofilm cells, with negative consequences for …
Yeasts Associated with Culex pipiens and Culex theileri Mosquito Larvae and the Effect of Selected Yeast Strains on the Ontogeny of Culex pipiens.
Steyn A, Roets F, Botha A. Steyn A, et al. Among authors: botha a. Microb Ecol. 2016 Apr;71(3):747-60. doi: 10.1007/s00248-015-0709-1. Epub 2015 Nov 14. Microb Ecol. 2016. PMID: 26573833
Although most yeasts supported larval growth in a similar manner to the positive control S. cerevisiae strain, the different yeast strains impacted differently on Culex pipiens ontogeny. Notably, survival and pupation of larvae were negatively impacted by a represen …
Although most yeasts supported larval growth in a similar manner to the positive control S. cerevisiae strain, the different yeast st …
Growth and mating of Cryptococcus neoformans var. grubii on woody debris.
Botes A, Boekhout T, Hagen F, Vismer H, Swart J, Botha A. Botes A, et al. Among authors: botha a. Microb Ecol. 2009 May;57(4):757-65. doi: 10.1007/s00248-008-9452-1. Epub 2008 Oct 11. Microb Ecol. 2009. PMID: 18850241
Strains grown on A. mearnsii yielded substantially greater yeast populations. A total of 26%, 6%, 46%, and 80% of the 36 C. neoformans strains tested were either able to mate or develop filaments when crossed on A. mearnsii and E. camaldulensis debris, V8 jui …
Strains grown on A. mearnsii yielded substantially greater yeast populations. A total of 26%, 6%, 46%, and 80% of the 36 C. ne …
Response of the microbial community to copper oxychloride in acidic sandy loam soil.
Du Plessis KR, Botha A, Joubert L, Bester R, Conradie WJ, Wolfaardt GM. Du Plessis KR, et al. Among authors: botha a. J Appl Microbiol. 2005;98(4):901-9. doi: 10.1111/j.1365-2672.2004.02537.x. J Appl Microbiol. 2005. PMID: 15752337
METHODS AND RESULTS: Culturable microbial populations were monitored for 245 days in a series of soil microcosms spiked with different copper oxychloride concentrations. ...However, a negative impact on protista was noted in soil containing only 15 mg kg(-1) EDTA-ex …
METHODS AND RESULTS: Culturable microbial populations were monitored for 245 days in a series of soil microcosms spiked with differen …
Degradation of aflatoxin B(1) by fungal laccase enzymes.
Alberts JF, Gelderblom WC, Botha A, van Zyl WH. Alberts JF, et al. Among authors: botha a. Int J Food Microbiol. 2009 Sep 30;135(1):47-52. doi: 10.1016/j.ijfoodmicro.2009.07.022. Epub 2009 Jul 28. Int J Food Microbiol. 2009. PMID: 19683355
A significant (P<0.0001) correlation was observed between laccase activity and AFB(1) degradation exhibited by representatives of Peniophora and Pleurotus ostreatus cultivated in minimal salts (MSM) (r=0.93) and mineral salts - malt extract (MSB-MEB) (r=0.77) liquid med
A significant (P<0.0001) correlation was observed between laccase activity and AFB(1) degradation exhibited by representatives of
Comparative analysis of environmental DNA extraction and purification methods from different humic acid-rich soils.
Lakay FM, Botha A, Prior BA. Lakay FM, et al. Among authors: botha a. J Appl Microbiol. 2007 Jan;102(1):265-73. doi: 10.1111/j.1365-2672.2006.03052.x. J Appl Microbiol. 2007. PMID: 17184343
CONCLUSIONS: Optimization of a purification protocol confirmed that only a combination of previously described methods proved sufficient in yielding pure environmental DNA from humic-rich soils. ...SIGNIFICANCE AND IMPACT OF THE STUDY: This study developed a
CONCLUSIONS: Optimization of a purification protocol confirmed that only a combination of previously described methods proved …
An isolation procedure for arachidonic acid producing Mortierella species.
Botha A, Paul I, Roux C, Kock JL, Coetzee DJ, Strauss T, Maree C. Botha A, et al. Antonie Van Leeuwenhoek. 1999 Apr;75(3):253-6. doi: 10.1023/a:1001848709005. Antonie Van Leeuwenhoek. 1999. PMID: 10427414
Fungi in a soil sample from mountain grassland able to grow under these conditions, amounted to a total of 2640 colony forming units per gram soil. ...
Fungi in a soil sample from mountain grassland able to grow under these conditions, amounted to a total of 2640 colony forming …
The production of biologically active eicosanoids by yeasts.
Kock JL, Venter P, Botha A, Coetzee DJ, Botes PJ, Nigam S. Kock JL, et al. Among authors: botha a. Adv Exp Med Biol. 1997;433:217-9. doi: 10.1007/978-1-4899-1810-9_46. Adv Exp Med Biol. 1997. PMID: 9561139 No abstract available.
The effect of dimethyldicarbonate on vegetative growth and ascospores of Byssochlamys fulva suspended in apple juice and strawberry nectar.
van der Riet WB, Botha A, Pinches SE. van der Riet WB, et al. Among authors: botha a. Int J Food Microbiol. 1989 May;8(2):95-102. doi: 10.1016/0168-1605(89)90064-0. Int J Food Microbiol. 1989. PMID: 2641891
Using apple juice as the suspending medium, vegetative growth was found to be sensitive to the compound at concentrations of 25 to 75 mg/l; temperature had a marked influence on lethality, with treatment at higher temperature being far more lethal than low temperature trea …
Using apple juice as the suspending medium, vegetative growth was found to be sensitive to the compound at concentrations of 25 to 75 mg/l; …
Application of fatty acid profiles in the identification of yeasts.
Botha A, Kock JL. Botha A, et al. Int J Food Microbiol. 1993 Jun 25;19(1):39-51. doi: 10.1016/0168-1605(93)90122-w. Int J Food Microbiol. 1993. PMID: 8357755 Review.
When used in isolation, CLFAC analyses is therefore not a generally applicable identification technique for yeast species. However, the technique was found to be a valuable chemotaxanomical tool to distinguish between strains of certain species, species of certain g …
When used in isolation, CLFAC analyses is therefore not a generally applicable identification technique for yeast species. However, t …
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