Welcome to our new undergraduate research assistants Joely Depoy and Alec Elder who joined us in the spring and summer respectively and are back in the lab working on culturing exciting new soil microbes, new graduate student Toby Halamka who is tackling soil lipid biomarkers, postdoc Jamie McFarlin working closely with collaborators in CU’s Institute for Arctic and Alpine Research (INSTAAR) on arctic paleoclimate, and postdoc Emma Bertran working on a joint project on nitrogen biochemistry with the Zhang lab at the Princeton Environmental Institute. Excited to have you all and looking forward to the fun science ahead.
Our collaborative proposal with the Leavitt lab at Dartmouth into the isotopic signatures of archaeal lipid biomarkers got funded by NSF. This will be a fantastic collaboration that has been several years in the planning and we look very much forward to working closely with the team at Dartmouth.
Fantastic kick-off event for CU’s new Center for Microbial Exploration connecting faculty and students interested in microbial research across the campus. Check out upcoming events on the CME website.
Silverman SN, Kopf SH, Bebout BM, Gordon R, Som SM. Morphological and isotopic changes of heterocystous cyanobacteria in response to N2 partial pressure. Geobiology. 2019;17:60–75. Congratulations to Shae, first student-lead paper from the lab! All data and analysis available on GitHub. Explore them interactively on Binder .
Two new papers out in the Journal of Bacteriology and Rapid Communications in Mass Spectrometry, respectively, by Caltech collaborator Caj Neubauer on refinements of heavy water lipid-SIP and its application in cystic fibrosis research: Refining the Application of Microbial Lipids as Tracers of Staphylococcus aureus Growth Rates in Cystic Fibrosis Sputum and Towards measuring growth rates of pathogens during infections by D2O-labeling lipidomics. Congrats Caj! See publications for full references and this link for a great commentary on this work by Tara Gallagher, Joann Phan and Katrine Whiteson.
Grad. student Ciara Asamoto continues the Princeton-Boulder exchange with a visit to the Sigman Lab.
New paper out in Geochimica et Cosmochimica Acta by Princeton collaborator Darcy McRose on the Effect of iron limitation on the isotopic composition of cellular and released fixed nitrogen in Azotobacter vinelandii. Congrats Darcy! See publications for full reference.
The second Rocky Mountain Geobiology Symposium (RMGS) once again took place at the Colorado School of Mines in Golden, CO. Enormous thanks to John Spear, Emily Kraus, Blake Stamps and everyone at Mines for organizing the second symposium and a fantastic day of science with participants from all over the Rocky Mountain states.
New paper out in Environmental Microbiology from work spear-headed by collaborator Ally Pasulka, Interrogating marine virus‐host interactions and elemental transfer with BONCAT and nanoSIMS‐based methods. Congrats Ally! See publications for full reference. Supplementary materials available on GitHub.
Sebastian is giving a talk in session 11d: Nitrogen isotopes in biogeochemical cycles and food webs and co-organizing session 15f: Novel tools and approach for investigating biogeochemical cycling and organic signatures of microbial activity at the 2017 Goldschmidt conference in Paris. Come join us for these exciting sessions!
Shaelyn Silverman is presenting her first talk at an international scientific conference at the Astrobiology Science Conference in Mesa, AZ on her senior thesis. Congrats Shae! S. N. Silverman, S. Kopf, R. Gordon, B. Bebout, S. Som. Measuring Ancient N2 Pressure Using Fossilized Cyanobacteria. Abstract #3242.
The first Rocky Mountain Geobiology Symposium (RMGS) took place at the Colorado School of Mines in Golden, CO with participants from all over the Rocky Mountain states and beyond enjoying a fantastic day of science, new connections, sunny Colorado spring weather and a memorable end-of-day at Golden’s New Terrain Brewing. Big thanks to John Spear, Emily Kraus, Blake Stamps and everyone at Mines for all the hard work fundraising and organizing an amazing day to kick off the RMGS tradition.
Shaelyn Silverman successfully defended her senior thesis on the Morphological and Isotopic Changes of Anabaena cylindrica PCC 7122 in Response to N2 Partial Pressure. After a year of hard work first with Sanjoy Som at NASA Ames over the summer after her junior year, followed by research in the Geomicrobial Physiology Lab at CU Boulder during her senior year, Shae presented a fantastic written thesis and presentation and received the much deserved highest honors recommendation. Congratulations to Shaelyn for an outstanding senior thesis!
The lab welcomes its first visitor. Matt Salie from the Williamson Lab at the Scripps Research Institute is visiting us this week to gain experience with continuous culturing techniques and gather preliminary data for his postdoctoral work on proteome dynamics. Welcome Matt!
After several months of renovations, the construction on the Geomicrobial Physiology culturing lab in the Benson Earth Sciences building wrapped up earlier this week and we officially moved in today. Several pieces of equipment are already set up and ready to go and the first set of experiments is under way - it’s going to be an exciting Spring!
The Isotope Geomicrobiology Group is seeking a highly qualified research technician and laboratory manager starting in February 2017. The Isotope Geomicrobiology Group comprises the Kopf and Wing labs located in the Benson Earth Sciences building and is focused on studying the physiology and geologic signatures (isotope effects and lipid biomarkers) of diverse geochemically relevant microorganisms (phototrophic, heterotrophic and chemolithotrophic aerobes and anaerobes across all domains of life). We regularly combine aspects of aerobic and anaerobic laboratory culture, continuous culture, molecular biology, fluorescence microscopy, aqueous chemistry, isotopic analysis, and experimental design (3D-printing, microcontroller & circuit setup), and are looking for a highly motivated individual with excellent technical, communicational and organizational skills who is looking to apply and expand their existing skillset in a friendly and highly collaborate research environment. For additional details and the CU Boulder application portal, please consult the official job posting.
Shaelyn Silverman is presenting a poster on Measuring Ancient Air Pressure Using Fossilized Cyanobacteria (Abstract ID 121646) on work that is part of her Senior Thesis at CU Boulder together with Sanjoy Som (NASA Ames). Allison Lee is presenting a poster on how Iron availability influences 15N-isotope fractionation during nitrogen fixation by aerobic chemoheterotroph Azotobacter vinelandii (Abstract ID 184186) on work that is part of her undergraduate research in Xinning Zhang’s new lab at Princeton University. First time at AGU, congratulations to both and have a great time at the conference!
Our new gas-chromatograph (GC) isotope ratio mass spectrometer (IRMS) is getting installed and we are looking forward to getting everything up an running. This is one of the instruments housed in the Organic Geochemistry Laboratory (OGL) in the new Sustainability, Energy and Environment Complex (SEEC). The OGL is a shared space with Julio Sepúlveda and Gifford Miller that provides a fantastic environment for all types of organic geochemistry research. The new GC-IRMS will complement the existing instrumentation and analytical tools acquired by Julio (an LC-Orbitrap and GC-triple quadrupole) and will allow us to determine the isotopic composition of specific organic compounds buy coupling the separating power of a gas chromatograph via a combustion/pyrolysis interface to the precision of an isotope ratio mass spectrometer.
The Geomicrobial Physiology culturing lab in the Benson Earth Sciences building is officially under construction with renovations scheduled to finish at the end of the year. We look forward to moving in and getting everything up and running early in the new year.