February 26, 2015: Our paper, "Imporance of a nanoscience approach in the understanding of a major aqueous contamination scenarios: case study from a recent coal ash spill," is now up in full glory: Yang et al, 2015, ES&T.
February 17, 2015: Just heard from my colleague Yi Yang that our manuscript on probing the nanoscale side of the Dan River Coal Ash Spill has been accepted at ES&T! I'll post a link as soon as it goes online.
Update: here's a link, Yang, Colman, Bernhardt, and Hochella, 2015, ES&T
January 28, 2015: The Bone et al. ET&C paper is now officially online!
January 8, 2015: First day teaching Biogeochemistry to a great class of upper level undergraduates, Master's, and PhD students. I'm pretty excited to be teaching, and I've got great support. We're using Biogeochemistry: an analysis of global change, Schlesinger and Bernhardt (2013). The best part is I'm teaching in place of one of the authors (Emily Bernhardt) during her sabbatical, and the other author (Bill Schlesinger) has agreed to lecture on my behalf when I have to travel. Truly an honor!
November 19, 2014: Our paper is now online as an accepted unedited version: Bone A, Matson CW, Colman BP, Yang X, Meyer JN, Di Giulio RT, 2014, “Silver Nanoparticle Toxicity to Atlantic Killifish (Fundulus Heteroclitus) and Caenorhabditis Elegans: A Comparison of Mesocosm, Microcosm and Conventional Laboratory Studies.” Environmental Toxicology and Chemistry, November, n/a – n/a. doi:10.1002/etc.2806.
November 11, 2014: Audrey Bone's paper (collaborator and PhD Student in Rich Di Giulio's lab) was just accepted at the SETAC journal, Environmental Toxicology and Chemistry, just in time for her to go to the SETAC annual meeting! This paper details the toxicity of silver nitrate and silver nanoparticles "aged" in several contexts including in our wetland mesocosms, in wetland mesocosm water in the lab, or in microcosms representative of the mesocosms. Toxicity is evaluated by using standard in-lab toxicity assays in one of my favorite fish (Fundulus heteroclitus, a.k.a. Atlantic killifish or mummichog) and everyone's favorite nematode (Caenorhabditis elegans). Take home messages: 1) toxicity of silver is changed by the transformation of silver in the environment, sometimes increasing and sometimes decreasing toxicity; 2) despite our efforts to replicate the mesocosms in microcosm form, our lab aging of particles has not replicated what we see in the field, likely due to the role of UV light; and finally, 3) without mesocosm experiments (capital and labor intensive but information rich), we would not have seen these important results. I'll post a link to the paper once it is online.
November 1, 2014: A huge (belated) welcome to the Bernhardt lab for Steve Anderson, my successor as lab-o-lympics champion in 2012. Steve was working in the Wright lab here at Duke, but we managed to recruit him in September to be the new technician on our work looking at the ecosystem impacts of nanomaterials. If you can't beat them, recruit them, and boy am I glad we did.
August 31, 2014: Finished taking down most recent wetland mesocosm experiment! See August 8th post for experiment details. It was two weeks of sampling water and soils, as well as catching fish, tadpoles, and a range of benthic macroinvertebrates. Many thanks to Leanne Baker (Matson and King labs, Baylor University) for her expertise, guidance, and assistance. Without her help it wouldn't have been possible. Thanks also to Chris Ward (Hunt lab, Duke Marine Lab) and Carley Gwin (Gunch Lab, Duke) for helping pick "bugs" (slang for benthic macroinvertebrates) even though their focus has been on other "bugs" (largely bacteria and archaea). And finally, thanks to Mengchi Ho and Wes Willis (Wetland Center, Duke), and Fabienne Schwabb (Wiesner lab, Duke) for their plant harvesting prowess.
Benjamin P. Colman
» Bernhardt Lab «
» Duke River Center «
» Duke Biology «
»Center for the Environmental Implications of Nanotechnology «
Research interests: Biogeochemistry, ecosystem ecology, plant microbe interactions, microbial ecology, ecotoxicology
Phone: (919) 660 - 7262
Email: benjamin.colman at duke.edu
Durham, NC 27708
124 Science Drive
Durham, NC 27708