In September 1982, my first postdoctoral fellow, Dr. Steve Macko, arrived from UTMSI. He brought with him not only boundless enthusiasm and a plethora of ideas, but the technical wherewithal to measure nitrogen isotopes in organic matter. Macko quickly set up sealed tube methods for analysing organic matter at the Geophysical Lab. Steve came with a host of marine science projects, collaborators from around the globe, as well as a zeal to learn as much as he could. His main project was to culture microorganisms, then separate and purify amino acids for isotopic analysis, similar to the original work of...

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