• 1. Van Heerden, E, Litthauer, D, and Verger, R (6-8 May 1999). “Surface kinetics of the pure lipase from Aspergillus niger”. Lipases and lipids: Structure, function and biotechnological applications. Santorini, Greece.
  • 2. Albertyn, J, Carlisle, E, Van Zyl, AE, Van Heerden, E, and Bragg, RR. (13-17 September 1999). Isolation and characterisation of a plasmid conferring NAD-independence in Haemophilus paragallinarum strains. HAP 99 conference, Mabula Lodge, South Africa.
  • 3. Mashope, BK, Lomniczi, B, Van Heerden, E, Bragg, RR, and Albertyn, J. (14-20 November 1999). An epidemiological survey of NDV in South Africa. 2nd international Virology and Microbiology conference, Yaounde, Cameroon.
  • 4. J Albertyn, B Lomniczi, BK Mashope, E van Heerden, and RR. Bragg (8-13 July 2000). A molecular epidemiological survey of Newcastle Disease Virus in Southern Africa. Joint Annual Scientific meeting of the Australian and New Zealand Society for Microbiology, Cairns, Australia.
  • 5. Nel, S, Van Heerden, E, Bragg RR, Albertyn, J. Cloning of the XynA gene of Thermomyces lanuginosus and expression in Saccharomyces cerevisiae, 22nd International Specialised Symposium on Yeasts: Yeast Fermentations and other Yeast Bioprocesses, Pilanesberg, South Africa, 25 -28 March 2002.
  • 6. JR Nolan, SM Pfiffner, KL Davis, TJ Phelps, KM Coleman, TL Kieft, E van Heerden, and D Litthauer. (May 2003). Hands-on Research and Educational Workshop for Minority Undergraduates in South Africa. American Society for Microbiology. Washington, D.C. In Abstracts of the annual meeting of the ASM.
  • 7. Sarah Bottomly*, James M Cantu, Susan M Pfiffner, Amanda Smithgall, Aaron D Peacock, David C White, Tommy Phelps, Duane P Moser, TC Onstott, and E van Heerden. (2006) Biodensity and Microbial Community Composition for Samples Recovered from Witwatersrand Basin Mines. ASM 2006 American Society for Microbiologists 21-25 May 2006 – Washington D.C.
  • 8. Parsons, A, Pfiffner, SM, Smithgall, AN, Weidow, BL and Van Heerden, E. (2006) In Situ Cartridges for Assessing Microbial Communities in Fracture Water. ASM 2006 American Society for Microbiologists 21-25 May 2006 – Washington D.C.
  • 9. Joseph, M, Kock, JLF, Pohl, CH, Van Heerden, E, Viljoen, BC, and Hugo, A. 2007. Fungal transformations of waste oils by Mucor. Oleochemicals under changing global conditions. DGF Symposium. 25-27 February 2007, Hamburg, Germany.
  • 10. Fritha Hennessy, Daniel F Visser, Varsha P Chhiba, Francisco Lakay, Esta van Heerden, Lizelle Piater, Christelle Moller, Derek Litthauer, Dean Brady (2007). Identification of novel open reading frames from metagenomic libraries generated from extremophilic organisms: application of metagenomics and high throughput screening for novel enzyme isolation The Third International Conference on Metagenomics July 11-13, 2007. California Institute for Telecommunications and Information Technology University of California, San Diego La Jolla, CA Metagenomics 2007 conference in San Diego.
  • 11. Daniel F Visser, Fritha Hennessy, Varsha P Chhiba, Francisco M Lakay, Justin Jordaan, Maureen Louw, Lizelle Joubert, Esta van Heerden, Lizelle Piater, Christelle Moller, Derek Litthauer, Dean Brady. Screening for novel enzyme activities in deep terrestrial environments: application of metagenomics and high throughput screening for novel enzyme isolation. The Third International Conference on Metagenomics July 11-13 2007. California Institute for Telecommunications and Information Technology University of California, San Diego La Jolla, CA Metagenomics 2007 conference in San Diego.
  • 12. Visser, DF, Hennessy, F, Brady, D, Chiba, VP, Rashamuse, KJ, Jordaan, J, Louw, ML, Nthangeni, B, Lakay, FM, Litthauer, D, Van Heerden, E, Piater, L, and Moller, C. (2007) Application of metagenomics for isolating biocatalysts from deep terrestrial environments. 8th International Symposium on Biocatalysis and Biotransformation, 8–13 July 2007, Oviedo, Spain.
  • 13. Dirk Opperman, Jose Berenguer 2, and Esta van Heerden 1. Chromate reductases from Thermus scotoductus SA-01: Comparison of expression and folding in E. coli and T. thermophilus International conference - Thermophiles 2007. September 24-27, Bergen. Norway.
  • 14. Esta van Heerden 1, Dirk Opperman 1, Armand Bester 1, Christelle Möller 1 Derek Litthauer Möller 1 and Victor Parro 2. Metal reductases from the South African Deep Subsurface. International conference - Thermophiles 2007. September 24-27, Bergen. Norway.
  • 15. J Lippmann-Pipke, J Erzinger, M Zimmer, C Kujawa, E van Heerden, A. Bester, H Moller, M Boettcher, and Z Reches. Direct observation of blasting triggered geogas transport through an inactive fault system at 3,6 km depth, TauTona gold mine. Poster presentation. SA National meeting on ICDP/IODP-projects, 12–14 March 2008, Hannover, Germany.
  • 16. G Lacrampe-Couloume, E van Heerden, LA Piater, DJ Opperman, A Bester, J Lippmann-Pipke, GF Slater, TC Onstott, and B Sherwood Lollar. Microbial methanogenesis in ancient groundwaters in Witwatersrand Basin: The timing of deep subsurface life. Poster presentation. ABSCICON 2008. The 5th Astrobiology Science Conference, 14–17 April, 2008, Santa Clara Convention Center Santa Clara, California, USA.
  • 17. L García-Moyano, L Piater, D Litthauer, TC Onstott, and E van Heerden. Microbial ecology of fossil water trapped 3,6 km below the surface in a South African mine. Poster presentation. 12th International Symposium on Microbial Ecology (ISME), 17–22 August 2008, Cairns, Australia.
  • 18. L Garcia-Moyano, L Piater, A Raji, C Möller, S Fuku, D Litthauer and E van Heerden. Microbial ecology of biofilms found in South African deep mines. Poster Presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
  • 19. S Pradhan, L Piater, D Litthuaer and E van Heerden. Analysis of bacterial diversity and related assemblage of sulphur-reducers associated with South African Goldfield Mines. Poster Presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
  • 20. W Müller, M Smit, E van Heerden and L Piater. A novel Archaeal cytochrome P450 isolated from a South African saltern. Poster Presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
  • 21. DJ Opperman, LA Piater, D Litthauer and E van Heerden. An Old Yellow Enzyme homologue from Thermus scotoductus SA-01. Poster Presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
  • 22. G Tlou, E van Heerden and L Piater. A thermostable lipase from a Geobacillus thermoleovorans GE-7 from an ultra-deep South African gold mine. Poster Presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
  • 23. Dirk J Opperman, B Trevor Sewell, Lizelle A Piater, Derek Litthauer, Mikhail N Isupov, Jennifer A Littlechild, and Esta van Heerden. Structure and Mechanism of a Thermostable Old Yellow Enzyme. BioTrans 2009. July 5-9, 2009. Berne, Switzerland.
  • 24. Jacqueline van Marwijk,*, Diederik Johannes Opperman, Mariekie Gericke, Esta van Heerden. Purification of a gold(III) reducing and nanoparticle producing protein from Thermus scotoductus SA-01. The 5th International Conference on Gold Science, Technology and Its Applications. Heidelberg, Germany. 26-29 July 2009.
  • 25. E Botes, R Jordan, MF DeFlaun, J Howell, R Borch, FC Liebenberg, E van Heerden. Bioremediation of Hexavalent Chromium Contaminated Water In Fixed-Film Upflow Reactors – a South African First. 14th International Biotechnology Symposium and Exhibition Biotechnology for the Sustainability of Human Society, 14-18 September 2010, Rimini – Italy. IBS 2010
  • 26. E Botes, R Jordan, MF DeFlaun, J Howell, R Borch, PD Price, E van Heerden. Bioremediation Using a Two-Phase Bio / Abiotic Approach To Treat Acid Mine Drainage in South Africa. 14th International Biotechnology Symposium and Exhibition Biotechnology for the Sustainability of Human Society. 14-18 September 2010, Rimini – Italy. IBS 2010
  • 27. Müller, Walter Joseph, Piater, Lizelle Ann, Albertyn, Jacobus, Van Heerden, Esta, Smit, Martha Sophia. Carotenoid metabolising cytochrome P450 monooxygenases from extremophiles 10th International Symposium on Cytochrome P450 Biodiversity and Biotechnology 2010 – Woods Hole, Massachusetts, USA
  • 28. Elsabe Botes, Robert Jordan, Mary F DeFlaun, Jim Howell, Robert Borch and Esta van Heerden. Bioremediation of Hexavalent Chromium Contaminated Water In Fixed-Film Upflow Reactors – a South African First. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 29. Errol Duncan Cason, Lizelle Anne Piater and Esta van Heerden. Thermophilic microbial interaction and reduction of uranium(VI) by Thermus scotoductus SA-01. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 30. Amelie Dukunde, Jacobus Albertyn, Esta van Heerden, Derek Litthauer. Improving heterologous protein expression with thermophilic, bacterial chaperones. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 31. Mariana Erasmus, Jacobus Albertyn, José Berenguer, Esta van Heerden. Charcatrization and expression of a protein involved in Gold Nanaoparticle formations by Thermus scotoductus SA-01. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 32. D Litthauer, K Gounder, H Liesegang, E Brzuszkiewicz, A Wolherr, R Daniel, G Gottschalk, O Reva, B Kumwenda, M Srivastava, E van Heerden. Hyperplasticity in the Thermus scotoductus SA-01 genome: Adapt and Acquire. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 33. Suzanne Litthauer*, Jakobus Albertyn, Derek Litthauer, Diederik Johannes Opperman, Esta van Heerden. Identification of Old Yellow homologues from subsurface thermophillic cultures. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 34. Ojo AO, Maleke M, Albertyn K, Osman A, and Van Heerden E. Microbial biodiversity of medicinal clay soil samples from Eastern Free State region. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22, 2011, Bloemfontein South Africa.
  • 35. Lippmann-Pipke, J, Sherwood Lollar, B, Niedermann, S, Stroncik, NA, Naumann, R, Van Heerden, E, and Onstott, TC, Erzinger, J, Zimmer, M, Kujawa, C, Boettcher, M, Van Heerden, E, Bester, A, Moller, H, Reches, Z. Geogases in the KaapVaal Craton: Origin and Modes of Transport. 2011.
  • 36. J Lippmann-Pipke*, B Sherwood Lollar, S Niedermann, NA Stroncik, R Naumann, E van Heerden, TC Onstott. Neon identifies two billion year old fluid component in Kaapvaal Craton. Goldschmidt 2011: Session 21c: Application of Noble Gases and Naturally Occurring Radioactive Isotopes in Waters and the Environment August 14-19, 2011 Prague, Czech Republic.
  • 37. Antonio Garcia, Derek Litthauer, Gaetan Borgonie, Armand Bester, Lizelle Piater, Tullis Onstott and Esta van Heerden. Unexpected eukaryotic diversity in deep (>0.8 km) fracture water in the South African subsurface. 8th International Symposium of Subsurface Microbiology. September 11-16,2011. Garmisch-Partenkirchen.
  • 38. Darya Kozhevnikova, Tatyana Sokolova, Alexander Lebedinsky, Esta van Heerden and Elizaveta Bonch-Osmolovskaya. New subterranean isolates from Beatrix Gold Mine in South Africa. Thermophoiles, Big Sky, Montana, USA. September 11-16, 2011.
  • 39. Suzanne Litthauer, Esta van Heerden, Frank Hollmann, Dirk J Opperman. Multiple Domain Old Yellow Enzyme. Biotrans, Giardini Naxos, Sicily. October 2-6 2011.
  • 40. B Sherwood Lollar, E van Heerden, TC Onstott, T Kieft. Research Laboratories and Deep Mines as a Window into Subsurface Microbiology. 12th International Conference on Topics of Astroparticle and Underground Physics. 5-9 September 2011, Munich, Germany.
  • 41. EA Bonch-Osmolovskaya, GB Slobodkina, ML Miroshnichenko, OL Kovaleva, A Yu Merkel, AA Perevalova, YN Nepomnyashchaya, AI Slobodkin, NA Chernyh, EE van Heerden, AV Mardanov, VV Kadnikov, OV Karnachuk, AV Lebedinsky. Identification and cultivation of thermophilic Planctomycetes. ISME 14th International Society for Microbial Ecology. 19-24 August 2012, Copenhagen, Denmark.
  • 42. Melody R Lindsay; Chui Yim M Lau; Gilbert Tetteh; Lindsay Snyder; Thomas L Kieft; Barbara S Lollar; Long Li; Sihle Maphanga; Esta van Heerden; Tullis C Onstott. Characterisation of active members in C and N cycles in the subsurface environment of the Witwatersrand Basin. American Geophysical Uniion, 3-7 December 2012, San Fransisco
  • 43. Mary DeFlaun, Jim Howell, Robert Borch, Maleke Maleke, Elsabe Botes, Peter Williams, Esta van Heerden. Pilot-scale Bioremediation of Hexavalent Chrome-contaminated Water – a South African First. 2nd Water research Conference, 20-23 January 2013, Singapore Expo, Singapore.
  • 44. Peter Williams, Maleke Maleke, Elsabe Botes, Mary DeFlaun, Esta van Heerden. Remediation of Uranium-contaminated Water in the Wonderfontein Catchment, West Rand, South Africa 2nd Water research Conference, 20-23 January 2013, Singapore Expo, Singapore.
  • 45. MCY Lau, C Magnabosco, CT Brown, S Grim, G Lacrampe-Couloume, K Wilkie, B Sherwood Lollar, DN Simkus, GF Slater, S Hendrickson, M Pullin, TL Kieft, L Li, L Snyder, O Kuloyo, B Linage, G Borgonie, J Vermeulen, M Maleke, N Tlalajoe, KM Moloantoa, E van Heerden, F Vermeulen, M Pienaar, A Munro, L Joubert, J Ackerman, C van Jaarsveld, and TC Onstott. Continental subsurface waters support unique but diverse C-acquisition strategies. AGU Fall Meeting, San Francisco, California, US, 9–13 December, 2013.
  • 46. C Magnabosco, MCY Lau, K Ryan, TL Kieft , L Snyder, B Sherwood Lollar, G Lacrampe Couloume, S Hendrickson, M Pullin, GF Slater, DN Simkus, G Borgonie, E van Heerden, O Kuloyo, M Maleke, T Tlalajoe, J Vermeulen, F Vermeulen, A Munro, M Pienaar, TC Onstott. Metagenomics and steady-state free energy flux values provide insight into the biogeochemical cycling of deep, meteoric water. AGU Fall Meeting, San Francisco, California, US, 9–13 December, 2013.
  • 47. Erasmus, M, Chen, J, Surridge, T, Van der Hoven, WG, and Van Heerden, E. 7-11 September 2014. Geological carbon sequestration and its influence on subsurface microbial biodiversity and metabolic carbon cycling. Poster presented at the 10th International Congress on Extremophiles, St. Petersburg, Russia.
  • 48. Cason, ED and Van Heerden, E. 7-11 September 2014. Anaerobic naphthalene degradation by an indigenous nitrate-reducing culture: metagenomic insight into potential hydrocarbon activating pathways. Poster presented at the 10th International Congress on Extremophiles, St. Petersburg, Russia.
  • 49. Kuloyo, O, Linage-Alvarez, B, Ojo, A, Castillo, J and Van Heerden, E. 7-11 September 2014. The search for Candidatus Desulforudis audaxviator yields additional Sulphate Reducing Bacteria (2.8 kmbls) and Iron III reducing bacteria (1.6 kmbls) from two South African deep mines. Poster presented at the 10th International Congress on Extremophiles, St. Petersburg, Russia.
  • 50. Linage-Alvarez, B, Borgonie, G, Kuloyo, O, Ojo, A, Shivambu, G, Cason, E, Maphanga, S, Vermeulen, J, Litthauer, D, Ralston, C, Onstott, TC, Sherwood-Lollar, B and Van Heerden, E. 7-11 September, 2014. Monhystrella parvella (Eumetazoa: Nematoda) survives inside a CaCO3 stalactite at -1,4 km in Beatrix Gold Mine (South Africa) and is of marine origin. Poster presented at the 10th International Congress on Extremophiles. St. Petersburg, Russia.
  • 51. Mariana Erasmus: R Molaoa, M Erasmus, T Höppener and E van Heerden. Biogas Production from Waste Residues and the role of Microorganisms Involved. 3rd International Congress on Water, Waste and Energy Management, Rome, Italy. 18-20 July 2016.
  • 52. Mariana Erasmus: KM Moloantoa, JC Castillo, PJ Williams, M Erasmus, ED Cason and E van Heerden. A Possible Bioremedial Solution for Nitrate Contamination in Open Cast Mines of Southern Africa. 3rd International Congress on Water, Waste and Energy Management, Rome, Italy. 18-20 July 2016.
  • 53. Maleke Maleke, Julio Castillo, Errol Cason, and Esta van Heerden. A thermophillic Thermus scotoductus SA-01 interaction with Rare Earth Elements under Extreme conditions. 3rd International Congress on Water, Waste and Energy Management, Rome, Italy. 18-20 July 2016

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