International talks:

• 1. Litthauer, D (presenting) and Van Heerden, E. “Selective ester formation by lipase.” International Congress of Biocatalysis, Russian Academy of Sciences. June, 1993. Moscow, Russia.
• 2. Van Heerden, E, and Litthauer, D. “Selective esterification of fatty acids by lipase.” Scientific Programme of the closing meeting of the EC-Bridge Lipase T-project. September 14-17, 1994. Bendor, France.
• 3. Litthauer, D (presenting) and Van Heerden, E. “Lipases in South Africa”. Laboratoire de Lipolyse Enzymatique, CNRS. February 1997. Marseille, France.
• 4. Litthauer, D, Van Heerden, E, and Verger, R. Selectivity of lipases in different media. Diamond Jubilee Symposium and 39th Annuual Conference of the Association of Microbiologists of India. December 1998.
• 5. Albertyn, J (presenting), Carlisle, E, Van Zyl, AE, Van Heerden, E, and Bragg, RR. (14-20 November 1999). Isolation and characterisation of a plasmid conferring NAD-independence in Haemophilus paragallinarum strains. 2^nd international Virology and Microbiology conference, Yaounde, Cameroon.
• 6. Invited Speaker: E van Heerden. National Science Foundation, Washington, D.C. (May 2001) Education Proposals for South African Collaboration.
• 7. TC Onstott, DP Moser, Li-Hung Lin, J Hall, K Takai, DL Balkwill, JK Fredrickson, F Brockman, LM Pratt, B Sherwood-Lollar, MF DeFlaun, J Hoek, GI Omar, T Kieft, SM Pfiffner, TJ Phelps, J Lippman, M Stute, G Southam, D Boone, BJ Baker, D Stahl, D Elias, J Suflita, R Wilson, N Spoelstra, D Nel, E van Heerden, D Litthauer, J Alexander, and C Reye, 2001. Microbiology and Biogeochemistry of Deep Hydrogeologic Environments of the Witwatersrand Basin, South Africa. SAGA
• 8. E van Heerden: Celanese Ventures GmbH, Frankfurt (Industriepark Höchst) – Germany. Director Thomas Kiy and Dr Dirk Fabritius. Lecture: Biocatalysis and other activities - lipases. October, 2001.
• 9. TC Onstott (presenting), J Fredrickson, D Moser, E van Heerden, E Botes, D Litthauer. South African Deep Mine project - Environmental DNA analysis. Dec. 2, 2001 South Africa Investigator’s Meeting, Lead South Dakota.
• 10. E van Heerden. Extremozymes: Small bugs – big business. International Research Exchange for Undergraduates (NSF funded). Biogeochemical Educational Experience. December 2001 – Bloemfontein (hosting institution).
• 11. DeFlaun, MF¹, D Balkwill ², E Stackebrandt ³, TC Onstott ⁴, S Streger ¹, H Dong ⁵, S Pfiffner ⁶, E van Heerden ⁷ and JK Fredrickson ⁸. A Novel Geobacillus thermoleovorans strain Isolated from an Ultra-deep Goldmine in South Africa. International Symposium for Subsurface Microbiology, Copenhagen, Denmark. 8-13 September 2002.
• 12. TC Onstott ¹, BJ Mislowack ¹, L-H Lin ¹, MM Davidson ¹, TM Gihring ², DP Moser ², JK Fredrickson ², FJ Brockman ², SM Pfiffner ³, TJ Phelps ⁴, LM Pratt ⁵, EA Boice ⁵, B Sherwood Lollar ⁶, J Ward ⁶, J Lippmannc ⁷, D Litthaur ⁸ and E van Heerden ^8. Does the lack of energy limit deep subsurface life? American Society for Microbiology (2004)
• 13. Onstott, TC, L Lin, J Hall, B Mislowac, M Borscik, S Pfiffner, DC White, A Peacock, J Fredrickson, F Brockman, D Moser, T Gihring, T Phelps, T Kieft, S McCuddy, B Sherwood-Lollar, J Ward, G Slater, L Pratt, E Boice, J Fong, J Lippmann, M Stute, P Schloesser, D Boone, A Bonin, G Southam, M Lengke, D Balkwill, E Trimarco, S Macko, B Gilhooly, B Baker, E van Heerden, D Litthauer, S Knoessen, C Rey, D Davidson and N Muthraparsad. December 2002. The Witwatersrand Deep Microbiology Project: Observations pertaining to hypothetical microbial ecosystems beneath the surface of Mars. American Geophysical Union. San Francisco, CA.
• 14. J Hall, L Lin, B Mislowac, TJ Pray, S Devlin, TC Onstott, S Pfiffner, A Peacock, DC White, K Davis, T Phelps, D Moser, J Fredrickson, T Gihring, F Brockman, T Kieft, S McCuddy, D Boone, A Bonin, L Pratt, E Boice, J Fong, B Sherwood-Lollar, J Ward, G Slater, J Lippmann, M Stute, P Schloesser, G Southam, M Lengke, D Balkwill, E Trimarco, D Litthauer, E van Heerden, D Davidson C Reye. September 2002. South African ultradeep mines - Long term sites for interdisciplinary studies into the exteme environment of the deep subsurface (LExEn). Microbial Observatory/LExEn Principal Investigators’ Workshop. Arlington, Virginia.
• 15. TC Onstott, L-H Lin, J Hall, B Mislowac, SM Pfiffner, A Peacock, DC White, E van Heerden, S Knoessen, and D Litthauer. The Witwatersrand Deep Microbiology Project: Observations Pertaining to Hypothetical Microbial Ecosytems Beneath the Surface of Mars. American Society for Microbiology (2002). Washington, D.C.
• 16. SM Pfiffner ¹, KL Davis ¹, TJ Phelps ², TL Kieft ³, TC Onstott ⁴, and E van Heerden ⁵. Use of Group Research Teams to Enhance Interdisciplinary Learning during an International Research Experience for Undergraduates. American Society for Microbiology (2002). Washington, D.C
• 17. *KM Coleman, JR Nolan, KL Davis, TJ Phelps, TL Kieft, E van Heerden, D Litthauer, SM Pfiffner. The Witwatersrand Deep Microbiology Project: Observations Pertaining to Hypothetical Microbial Ecosytems Beneath the Surface of Mars. American Geophysical Union meeting, San Francisco, December 6-10, 2002, at the Moscone Convention Center, 747 Howard Street, San Francisco, California,USA. U.S./South African Undergraduate Education and Research Workshops
• 18. *TC Onstott, L Lin, J Hall, B Mislowac, M Borscik, S Pfiffner, DC White, A Peacock, JK Fredrickson, F Brockman, DP Moser, TM Gihring, TJ Phelps, T Kieft, S McCuddy, B Sherwood-Lollar, J Ward, G Slater, LM Pratt, E Boice, J Fong, J Lippmann, M Stute, P Schloeser, D Boone, A Bonin, G Southam, M Lengke, D Balkwill, E Trimarco, S Macko, B Gilhooly, B Baker, E van Heerden, D Litthauer, S Knoessen, C Rey, M Davidson, N Muthraparsad. American Geophysical Union meeting, San Francisco, December 6-10, 2002, at the Moscone Convention Center, 747 Howard Street, San Francisco, California,USA. The Witwatersrand Deep Microbiology Project: Observations Pertaining to Hypothetical Microbial Ecosytems Beneath the Surface of Mars.
• 19. TC Onstott, L Lin, B Mislowack, J Hall and M Davidson, S Pfiffner, A Peacock and DC White, T Phelps, D Moser, J Fredrickson, T Gihring and F Brockman, T Kieft and S McCuddy, D Boone and A Bonin, L Pratt, E Boice and J Fong, B Sherwood Lollar, J Ward, G Slater, J Lippmann, M Stute and P Schloesser, G Southam and M Lengke, D Balkwill and E Trimarco, D Litthauer and E van Heerden, G Omar, 2003. Nuclear-powered deep subsurface microbial communities? AAAS Annual Mtg.
• 20. E van Heerden. Novel Metal reductases from Deep Mine Isolates – Properties and prospects. Workshop on Biotechnological Applications of Deep Subsurface Microbial Investigations. (December 2002, Johannesburg).
• 21. E van Heerden. Biotechnological applications of Extremophiles. Research Exchange for Undergraduates on Deep Subsurface Microbial Investigations. (December 2002, Bloemfontein).
• 22. KM Coleman, JR Nolan, KL Davis, TJ Phelps, TL Kieft, E van Heerden, D Litthauer and SM Pfiffner. US/South African Undergraduate Education and Research Workshop. American Geophysical Union meeting, San Francisco, December 6-10, 2004.
• 23. SM Pfiffner, KL Davis, and E van Heerden (May 2003). Hands-on Educational Workshops for Underrepresented Undergraduates in South Africa 10th Undergraduate Microbiology Education Conference.
• 24. E van Heerden. Extremophiles – endless possibilities. Research Exchange for Undergraduates on Deep Subsurface Microbial Investigations. (June–August 2003, Bloemfontein).
• 25. SM Pfiffner, KL Davis, TJ Phelps, TL Kieft, TC Onstott, and E van Heerden. May 2004. Use of group research teams to enhance interdisciplinary learning during an international research experience for undergraduates. In: Abstracts of the 104th Annual American Society for Microbiology Meeting.
• 26. E van Heerden. Lecture by invitation from Prof TC Onstott. Department of Geosciences, Princeton University, New Jersey. September 2003. Thermostable Reductases from Deepest Darkest Africa.
• 27. E van Heerden. Lecture by invitation from Prof SM Pfiffner. University of Tennessee – Biomarker Analysis. Knoxville, Tennessee. October 2003. Research exchange for undergraduates and metagenomic libraries.
• 28. Esta van Heerden. Central South Africa - University of the Free State – Untapped Astrobiological Potential – National Astrobiology Institute Executive Council meeting – NASA Ames Reseach Center March 2004.
• 29. The Witwatersrand Project group – Astrobiological Potential. Astrobiology Science Conference 2004. NASA Research Park – Moffett Field, California. March 2004.
• 30. Van Heerden, E, and Piater, LA. June 2004. The construction and access of environmental genomic libraries. International Research Experience for Undergraduates (REU): Biogeochemical Education Experience - South Africa. Bloemfontein. NSF and NRF co-sponsored.
• 31. SM Pfiffner ¹, KL Davis ¹, TJ Phelps ², TL Kieft ³, TC Onstott ⁴, and E van Heerden ^5. Use group research teams to enhance interdisciplinary learning during an international research experience for undergraduates - July 2004. Geosciene Africa – Johannesburg.
• 32. Research Experience for Undergraduates: an International Program Enhancing Interdisciplinary Learning. Susan M Pfiffner ¹, Kimberly L Davis ¹, Tommy J Phelps ^2, Thomas L Kieft ³, Thomas M Gihring ⁴, Tullis C Onstott ⁵, Lizelle Piater ⁶, and Esta van Heerden ⁶ . AGM, 7-10 November 2004, Denver, Colorado, USA. Annual Geology meeting.
• 33. Van Marwijk, J, Gericke, M, and Van Heerden E. Biological syntesis of gold nanoparticles. Gold 2006 – New Industrial Applications for Gold. The 4^th International Conference on Gold Science, Technology and its Application. 3-6 September 2006. University of Limerick, Ireland.
• 34. Pfiffner, SM, White, DC, Phelps, T, Pratt, L, Onstott, TC, and Van Heerden, E. (2006). The Search for life in the deep subsurface: Membrane lipid biosignatures. Paper presented at the Philadelphia Annual Meeting, 2006 Philadelphia Annual Meeting (22–25 October 2006) Philadelphia, Pennsylvania. The Geological Society of America.
• 35. 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. ABSCICON 2008. The 5th Astrobiology Science Conference April 14- 7, 2008. Santa Clara Convention Center Santa Clara, California, USA.
• 36. J Lippmann-Pipke, J Erzinger, M Zimmer, C Kujawa, E van Heerden, A Bester, H Moller, M Boettcher, Z Reches. Direct observation of blasting triggered geogas transport through an inactive fault system at3.6km depth, Tautona gold mine, SA National meeting on ICDP/IODP-projects in Hannover, Germany (March 12-14 2008).
• 37. E van Heerden, D Litthauer, LA Piater, and TC Onstott. Metabolic promiscuity from the deep subsurface a story of Survival or Superiority. Invited oral presentation: SPIE's Optical Engineering + Applications symposium, 10-14 August 2008, San Diego, CA.
• 38. Dylan Chivian, Eric J Alm, Eoin L Brodie, David E Culley, Thomas Gihring, Alla Lapidus, Li-Hung Lin, Steve Lowry, Duane P Moser, Paul Richardson, Gordon Southam, Greg Wanger, Lisa M Pratt, Adam P Arkin, Terry C Hazen, Fred J Brockman and TC. Onstott, Andrew Aubrey, Jeffrey Bada, and Esta van Heerden. Shedding light on the terrestrial subsurface biosphere in deepest, darkest Africa through metagenomic analyses: Environmental genomics reveals a single, slowly evolving, species ecosystem deep within the Earth. Keynote presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
• 39. E van Heerden, D Litthauer , LA Piater and TC Onstott. Metabolic promiscuity from Thermus scotoductus SA-01: An extensive investigation of the proteins from this thermophile from the Deep subsurface. Oral presentation. Extremophiles 2008, 7–11 September 2008, Cape Town, South Africa.
• 40. TC Onstott, E Chan, E van Heerden, D Litthauer, A Bester, Z Reches, G van Aswegan, H Moller, and J Lippmann-Pipke. An in situ bioseismicity experiment 3,6 km beneath the surface at NELSAM. AGU Fall Meeting 2008: Special Section H66, 15–19 December 2008, San Francisco, California, USA.
• 41. R Jordan, E Botes, D Litthauer, LA Piater and E van Heerden. Microbial biome monitoring and its effective use in upscaled Cr (VI) bioremediation. Proceedings of the Bio- and Hydrometallurgy 9 May conference. Cape Town, South Africa. April 6-7 2009.
• 42. Mabizela, L, Van Heerden, E, Garcia-Moyano, A, Litthauer, D. (Invited Lecture, Presenter) Unculturable phage diversity in the deep South African subsurface. 3rd European Medicines Agency Genome Sequencer FLX User Conference, Corinthia Hotel, Lisbon. June 15–17 2009.
• 43. Van Heerden, E, Bester, PA, Gounder, K, Litthauer, D, and Opperman, DJ. Mechanisms and Multitasking of “reductases” from Thermus scotoductus SA01. Thermophiles 2009. August 16-21. Beijing China.
• 44. Gounder, K, Liesegang, H, Bruzuzkiewicz, E, Wolherr, A, Daniel R Gottschalk, G van Heerden, E and D Litthauer. The genome sequence of Thermus scotoductus SA01 sheds more light on its metal reducing abilities. Thermophiles 2009. August 16-21. Beijing China.
• 45. E van Heerden (Invited lecture TWAS lecture): Third World Academy of Sciences (TWAS) /Academy of Science of South Africa (ASSAF)/Department of Science and Technology (DST) Young Scientist Prize 2009 – The terrestrial subsurface biosphere in deepest darkest Africa. The 11^th General Conference and 20^th General Meeting of TWAS will be held in Durban, South Africa, 23 October 2009.
• 46. Johanna Lippmann-Pipke, Joerg Erzinger, Martin Zimmer, Christian Kujawa, Margaret S Boettcher, Gerrie van Aswegen, Hannes Moller, Esta van Heerden, Armand Bester, Zeev Reches. Longterm, onsite borehole monitoring of gases released from an active fault system at 3,6 km depth, TauTona Gold Mine, South Africa. 2009 AGU Fall Meeting, 14-18 December, San Francisco, California.
• 47. E van Heerden and DJ Opperman. The terrestrial subsurface – a source for novel catalysts. II International workshop on Novel Enzymes. 13-17 April 2010. University of Exeter, UK.
• 48. Müller WJ, Piater L, Albertyn, J, Van Heerden, E, and Smit, M. (18-20 January 2010). Cytochrome P450 monooxygenases from the genus Thermus. 22nd Congress of the South Africa Society for Biochemistry and Molecular Biology, Bloemfontein, South Africa.
• 49. Van Heerden, E, Jugdave, A, Albertyn, J, Cason, ED, Bester, PA, Gounder, K, Botes, E, Garcia, A, Opperman, DJ, Van Marwijk, J, Erasmus, M, and Litthauer, D. Deep mine biodiversity: Flexibility and adaptability for application. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22 2011, Bloemfontein, South Africa.
• 50. Gaëtan Borgonie, Antonio García-Moyano, Derek Litthauer, Wim Bert, Armand Bester, Esta van Heerden, Christelle Möller, and Tullis C Onstott.. Worms from hell: Nematoda from the terrestrial deep subsurface of South Africa. New Horizons for International Investigations into carbon Cycling in the Deep Biosphere. January 10-22 2011, Bloemfontein, South Africa.
• 51. Esta van Heerden, G Borgonie, A Jugdave, A Garcia, D Litthauer, and TC Onstott (2011). Deep Subsurface biodiversity – Novelty and Flexibility. Presented by Richard Hoover – NASA. San Diego, California, USA. 21-25 Augustus 2011. SPIE
• 52. Sherwood Lollar, Barbara, Van Heerden, Esta, Onstott, Tullis, KIEFT, Thomas, and Itavaara, Merja. Follow the Water – A search strategy for exploration of the Earth’s deep biosphere.:. Geological Society of America Annual Meeting Oct 9-11 2011. Exploring The Deep Biosphere. Minneapolis.
• 53. Onstott, Tullis, Chehoud, C, Van Heerden, E, Litthauer, D, Jugdave, A, Albertyn, K, Kieft, T, Borgonie, G, Garcia-Moyano, A, and Chivian, D. From Bacterial finches to Bactivorous Meiofauna. Microbia; Biogeography of the deep crustal biosphere. Geological Society of America Annual Meeting Oct 9-11 2011 Exploring The Deep Biosphere. Minneapolis.
• 54. B Sherwood Lollar*, TC Onstott, TL Kieft, L Li, E van Heerden, GF Slater, DP Moser, G Lacrampe-Couloume, G Holland and CJ Ballentine. Network of Terrestrial Subsurface sites in Precambrian Shields: Insights for Early Earth and Mars. Goldschmidt - June 24-29 2012 • MONTRÉAL, CANADA.
• 55. B Sherwood Lollar, TC Onstott, E van Heerden, T Kieft and CJ Ballentine. Life in Inner Space: Subsurface Microbiology Investigations in Underground Research Laboratories and Deep Mines. American Geophysical Union. AGU 2012 – San Fransisco, 3-7 December 2012.
• 56. Ramunas Stepanauskas; Tullis C. Onstott; Chui Yim Lau; Thomas L Kieft; Tanja Woyke; Christian Rinke; Alexander Sczyrba; Esta van Heerden. Single cell genomics of subsurface microorganisms (Invited). American Geophysical Union. AGU 2012 – San Fransisco, 3-7 December 2012.
• 57. J Lippmann-Pipke, J Erzinger, M Zimmer, C Kujawa, M Boettcher, E van Heerden, A Bester, E Cason, H Moller, Z Reches. Long-term, on-site borehole monitoring of gases released from an “active” fault system at 3,6 km depth, TauTona Gold Mine, South Africa – Geo-Future 2012. GFZ German Research Centre for Geosciences, Telegrafen, Potsdam. 26-30 Novermber 2012. Presented by J Lippmann-Pipke
• 58. E van Heerden, P Price and T Tvonghi. Second Deep Energy Workshop.31 January 2013 – 1 Febraury 2013. Manchester, UK. Deep Biogenic Gas potential in Virginia, Karoo Basin, South Africa.
• 59. E van Heerden, J Howell, R Borch, E Botes, P Williams, E Cason, M Maleke, WG van der Hoven, and MF DeFlaun. Metal Bioremedaition – Hexavalent Chromium Bioremedaition. Invited presenter at the Institution of Engineers, Malaysia. Seminar day on Bioremediation of Heavy Metals in Groundwater (IEM12/HQ/246/S) and research talk on site of GSM (Geosyntec, Malaysia) Ipoh. January 24-25 2013. Deep Mine Research and Applying the knowledge.
• 60. PJ Williams, MF DeFlaun, E van Heerden. Hexavalent chromium bioremediation – Pilot reactor construction. Presentation at the “Bioremediation of heavy metal contaminated groundwater” Workshop, Environmental Engineering Technical Division, The Institution of Engineers, Malaysia, 25 January 2013, Kuala Lumpur, Malaysia.
• 61. M Erasmus, J Chen, T Surridge, WG van der Hoven, E van Heerden. Carbon Sequestration, Subsurface Microbial Biodiversity and Metabolic Carbon Cycling. DCO Sandpit Workshop for Bioreactors. Veyrier-du-Lac, Annecy, France. 25–29 August 2013.
• 62. R Purtschert, TC Onstott, W Jiang, ZT Lu, P Müller, E van Heerden, M Erasmus, G Borgonie, B Linage, O Kuloyo, R Kipfer, MS Brennwald, B Visser, S Maphanga, L Joubert. 81Kr Concentrations in Deep Fracture Waters of the Witwatersrand Basin, South Africa. Goldschmidt Conference. Florence, Italy. 25–30 August 2013.
• 63. M Lau, M Lindsay, TL Kieft, M Pullin, S Hendrickson, DN Simkus, GF Slater, B Sherwood Lollar, L Li, G Lacrampe-Couloume, E van Heerden, M Erasmus, G Borgonie, B Linage, O Kuloyo, B Mailloux, V Heuer, KU Hinrichs, S Maphanga, TC Onstott. Active Carbon Cycling in Deep Subsurface Fracture Environments: Insights from RNA, Lipid and Isotopic Analyses. Goldschmidt Conference. Florence, Italy. 25– 30August 2013
• 64. 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, single cell genomics, 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.
• 65. TL Kieft, MCY Lau, C Magnabosco, C Cameron, MJ Pullin, S Hendrickson, B Sherwood Lollar, E van Heerden, and TC Onstott (2014). Dissolved organic carbon and microbial communities in the deep biosphere: comparisons of deep fracture waters from 0,9 to 3,1 km depth, Witwatersrand Basin, South Africa. 15^th International Symposium on Microbial Ecology, 24–29 August, Seoul, Korea.
• 66. Van Heerden, E, Tlalajoe, N, Onstott, TC, and Lau, M. 7-11 September 2014. Deep mine subsurface research – Diversity, geochemistry and (meta)genomics. Esta van Heerden, RSA research group (then and now), International research team. Paper delivered at the 10th International Congress on Extremophiles. St. Petersburg, Russia.
• 67. Alba Gomez, Julio Castillo, JJ Posthumus, Esta van Heerden. Evidence for effective treatment of alkaline mine drainage using a matrix of baco3 and wood chips: solution for in-situ passive treatment. 2014. 21^st General Meeting of the International Mineralogical Association (IMA 2014), South Africa
• 68. V Diedericks, J Castillo and E van Heerden. The reduction of Chromium using pilot scale reactors. IMA 2014. Sandton Convention Centre, South Africa. 1-5 September 2014.
• 69. Linage, B, Borgonie, G, Kuloyo, O, Boshoff, P, Mzimels, B, Matebese, P, Sherwood-Lollar, B, Onstott, TC, and Van Heerden, E. 18-21 February 2014. Describing microbial diversity in fissure water at increasing depth underground boreholes. Paper delivered at the Deep Carbon Observatory, Early Career Scientist Workshop. San José, Costa Rica.
• 70. Maleke, M, Castillo, J, Williams, PJ, Ojo, A, DeFlaun, MF, and Van Heerden, E. 1-5 September 2014. Optimisation of a bioremediation system of soluble uranium based on the biostimulation of an indigenous bacterial community. Paper delivered at the 21^st General Meeting of the International Mineralogical Association. Johannesburg, South Africa.
• 71. Moloantoa, KM, Castillo, J, Wan, M, Peiffer, S, and Van Heerden, E. 1-5 September 2014. Speciation of polysulfides generated by lepidocrocite reduction in the presence of sulphate reducing bacteria. Papaer delivered at the 21^st General Meeting of the International Mineralogical Assocition, Johannesburg, South Africa.
• 72. MCY Lau, C Magnabosco, R Alleva, W Wang, D Perlman, S Kyin, S Maphanga, S Shivambu, E van Heerden, and TC Onstott (2014). Hallelujah! The in situ nitrogen cycle within the subterranean crust. Oral presentation at AGU 2014 Fall Meeting, 15-19 December 2014, San Francisco, California, USA.
• 73. MCY Lau, C Magnabosco, C Cameron, DN Simkus, GF Slater, JM Labonté, R Stepanauskas, S Hendrickson, M Pullin, B Sherwood Lollar, O Kuloyo, B Linage, G Borgonie, E van Heerden, TL Kieft and TC Onstott (2015). Insights into deep terrestrial biosphere: from molecule to ecosystem-level. Oral presentationat Deep Carbon Observatory Meeting, 26–28 March 2015, Munich, Germany.
• 74. Alba Gomez, Julio Castillo, JJ Posthumus, Esta van Heerden. Evidence for effective treatment of alkaline mine drainage using a matrix of BaCO3 and wood chips: solution for in-situ passive treatment. (IMWA). Mine Water and the Environment. ISBN 978-956-9393-27-3. Paper 303. Santiago, Chile (GECAMIN), 2015
• 75. Julio Castillo, JJ Posthumusa, Alba Gomez, Esta van Heerden. Geochemical interaction of acid and alkaline mine drainage (AMD) with BaCO3: Optimisation of biological and chemical systems for AMD treatment. (IMWA 21-24 April 2015). Mine Water and the Environment. ISBN 978-956-9393-27-3. Paper 290. Santiago, Chile (GECAMIN).
• 76. Lau, MCY, Magnabosco, C, Simkus, D, Slater GF, and Kieft, TL, Sherwood Lollar, Barbara, Van Heerden, E, and Onstott, TC. Microbial CH4 production and oxidation at a 1,34 km deep subterranean site in South Africa. Deep Life Community Lisbon Portugal Meeting, 7-9 May 2015
• 77. KIEFT, Thomas L., ONSTOTT, Tullis, LAU, CYM, MAGNABOSCO, Cara, SLATER, Greg F, STEPANAUSKAS, Ramunas, and VAN HEERDEN, Esta(2015). MICROBIAL CARBON CYCLING IN THE DEEP BIOSPHERE OF THE KAAPVAAL CRATON, SOUTH AFRICA. 2015 GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)
• 78. ONSTOTT, Tullis, LAU, CYM, MAGNABOSCO, Cara, SLATER, Greg F, SHERWOOD LOLLAR, Barbara, KIEFT, Thomas, STEPANAUSKAS, Ramunas, VAN HEERDEN, Esta and BORGONIE, G. (2015) THE DEEP CONTINENTAL BIOSPHERE: ABUNDANCE, DIVERSITY AND ACTIVITY GSA Annual Meeting in Baltimore, Maryland, USA (1-4 November 2015)
• 79. M Erasmus, TC Onstott, MF DeFlaun, TJ Phelps and E van Heerden. Geological Carbon Sequestration and its Influence on Subsurface Microbial Diversity and Metabolic Carbon Cycling. 33^rd Annual International Pittsburg Coal Conference. Cape Town, South Africa. 8-12 August 2016.
• 80. TC Onstott*, C Magnabosco, MCY Lau, TL Kieft, E van Heerden, H Dong, L-H Lin, K Pedersen, W Ghiorse, B Sherwood Lollar. 2016. The Biomass and Biodiversity of the Continental Subsurface Biosphere. Goldsmidt YokoHama 26 June-1 July 2016.
• 81. Castillo J, Linage B, Fourie C, Vermeulen M, Cason E, Coetsee-Hugo E, Swart H, Nieto JM, Macias F, Caraballo M, Becerra M, Gomez-Arias A, Corzo A, Papaspyrou S, Jimenez-Arias JL, Gonzalez-Perez JA, and Van Heerden, E. Bacterial Mutualism as New Strategy of Survive Extreme Acidic and Microaerophilic Conditions. Goldsmidt YokoHama 26 June-1 July 2016
• 82. Mª Carmen Duran-Ruiz, Sandra Torres Herrera, Julio Castillo, Borja Linage, Mercele Vermeulen, Juan Luis Jimenez-Arias, Jose Miguel Nieto, Esta van Heerden, Alfonso Corzo, Sokratis Papaspyrou. Integrated metaproteomic and metagenomic analysis of a microbial biofilm adapted to extreme acidic conditions from an acid mine drainage system. Poster, 6^th Seprot (Spanish Society of Proteomic) Congress, 2016.
• 83. M Manzi, B Sherwood Lollar, T Onstott and E van Heerden. 3D Seismics and Isotopic Analysis Provides Constraints on the Origin of Methane in the Earths Deep Subsurface. 78^th EAGE Conference and Exhibition 2016 - Near Surface - Engineering Geophysics and Characterisation Publication date: 31 May 2016 DOI: 10.3997/2214-4609.201600797