Photosynthetic solar energy conversion occurs on an immense scale across the earth, influencing our biosphere
from climate to oceanic food webs. These are amazing solar cells! Fronds in kelp forests, crustose coralline algae and
purple bacteria have shown interesting properties relevant these energy transfer phenomena. Underpinning these examples are some fascinating chemical physics, where experiments and theories reveal the mechanisms involved in the ultrafast energy transfer processes of light harvesting. This talk will introduce the incredible physical processes that initiate photosynthesis in the first picoseconds after light is absorbed.
Co-sponsored by the Natural Sciences and Engineering Research Council of Canada (NSERC) and hosted by Ryerson University.
ThIs lecture was given at Ted Rogers School of Management, Ryerson University, 55 Dundas Street West, Toronto M5G 2C3 – 7th Floor Room TRS-1-067.
Hosted by Ryerson University.
Where Captain Nemo Got It Right, and Wrong – Life in the Deep Earth
From Jules Verne’s Captain Nemo, to Astronaut Mark Watney stranded on Mars, we remain fascinated by the theme of Exploration. Fact can be stranger than fiction however as we discover that even here on Earth, there are parts of the planet we have only begun to probe for new habitable domains and microbial ecosystems.
Today we will journey with explorers past, present and future as we descend into some of the places on Earth where life ekes out an existence far from the energy of sunlight. We will discuss microorganisms that draw their energy for life not from the sun but from the power of chemistry in the deep dark places of the Earth – in subsurface habitats ranging from the black smoker vents of the ocean’s hydrothermal fields, to deep fracture waters bubbling up 3 km below the surface of northern Canada and in the gold mines of South Africa.
How did they get so deep? What do they eat? How old are they? Some of the answers will make Mark Watney wish he had looked under a few rocks.
Dr. Barbara Sherwood Lollar, C.C. FRSC is a University Professor in Earth Sciences at the University of Toronto. She is Research Chair in Isotopes of the Earth and Environment, Director of the Stable Isotope Laboratory, and Past-President of the Geochemical Society. In 2015 she was named a Fellow of the American Geophysical Union. Sherwood Lollar has published extensively in research on stable isotope geochemistry and hydrogeology, the fate of carbon-bearing fluids and gases such as CO2, CH4 and H2 in ancient fracture waters in the Earth’s crust, and the role of deep subsurface microbial populations in carbon cycling. She has been a recipient of many academic awards (including the NGWA Darcy Lecturer, Steacie, Killam and NSERC Accelerator Awards) and most recently the 2012 Eni Award for Protection of the Environment 2012 Geological Society of America Geomicrobiology and Geobiology Prize, and NSERC Polanyi Research Award. Sherwood Lollar was selected in 2000 by Time Magazine Canada for their feature on ”Leaders for the 21st Century” and by Canadian Geographic in 2013 for their list of Ten Canadians “Changing the World” along with and Astronaut Chris Hadfield.