The Maryland Sea Grant Bookstore is closed for the winter holidays from Monday, December 15th to Friday, January 5th and will not be taking orders during that time.

Kailee Potter, Adams State College

Class Year:

2012

Mentor:

Johan Schijf, Ph.D.

Project Title:

Stability of Ni(II) and Cu(II) Complexes with Desferrioxamine B at Seawater Ionic Strength

Abstract:

In oceanic systems, microorganisms secrete siderophores to facilitate the uptake of Fe(III) which is a scarce and essential nutrient. Siderophores are capable of binding to metal ions other than Fe3+. In this research, desferrioxamine B was used as a representative siderophore and the stability constants for its complexation with Cu2+ and Ni2+ were determined at seawater ionic strength (0.7 M). Stability constants, log β1, log β2, and log β3 for the Ni-DFOB complex were found to be 4.65±0.04, 7.72±0.03, and 9.76±0.07, respectively. Stability constants for Cu(II), log β1 and log β2, were determined to be 7.86±0.06 and 13.09±0.04, respectively, but log β3 could not be resolved from titration data in the presence of excess DFOB, indicating that Cu2+ does not form a bond with the third hydroxamate group of the siderophore.

Location:

Chesapeake Biological Laboratory

Publications:

Schijf, J., E. A. Christenson and K. J. Potter*. 2015. Different binding modes of Cu and Pb vs. Cd, Ni, and Zn with the trihydroxamate siderophore desferrioxamine B at seawater ionic strength . Marine Chemistry 173:40-51 .

Presentations:

Potter, K.*, J. Schijf, and E. Christenson. 2013. Different binding modes of Ni (II) and Cu (II) to the bacterial siderophore desferrioxamine B in seawater-like solutions . American Chemical Society National Meeting and Exposition, New Orleans, Louisiana .

The REU students are indicated with an asterisk (*).

RECENT REU FELLOWS

REU NEWS

  • Eight students will be presenting the summer work at the Ocean Sciences Meeting in March 2022!

  • REUs at CERF 2019
    2019 REUs presented at the CERF Conference in Mobile, AL
  • Olivia Saliger won a student presentation awards for talk at the 2019 Coastal Estuarine Research Federation Meeting. Her REU mentor was Judy O'Neil.

  • Congratulations to 2015 REU Alison Aceves for being selected as an honorable mention in the 2015 NSF Graduate Research Fellowship Program competition.

  • In February 2016, seven REUs from the 2015 cohort presented their research findings at the Ocean Sciences Meeting in New Orleans, Louisiana.

  • Congratulations to 2015 REU Hope Ianiri on receiving the NSF Graduate Research Fellowship (2016)!

  • Jeanette Davis, Ph.D. (REU '06) published a children's book, Science is Everywhere.

  • Like us on Facebook!   Facebook icon

REU Notification List

Subscribe

* indicates required
Type

Please select all the ways you would like to hear from Maryland Sea Grant College:

You can unsubscribe at any time by clicking the link in the footer of our emails. For information about our privacy practices, please visit our website.

We use Mailchimp as our marketing platform. By clicking below to subscribe, you acknowledge that your information will be transferred to Mailchimp for processing. Learn more about Mailchimp's privacy practices here.

The Blue Crab: Callinectes Sapidus

An essential resource for researchers, students, and managers.  Get your copy today!

Subscribe to Our Newsletter