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UNF Limnology Students perform field work at Lake Oneida.
Salt marsh
Oyster beds
Students and professor working with a Benthic tray
gator hatchling
entire class crossing florida creek
Two Herons

Charles B. Coughlin

Charles B. Coughlin headshot


Faculty Bio

Associate Lecturer

Phone: (904) 620-1854

Office: Building 59/2314



Areas of Expertise

General Biology I Laboratory, Human Biology Laboratory, Human Structure and Function Laboratory, Anatomy and Physiology I and II Laboratories, Microbiology Laboratory, Biochemistry Laboratory, Molecular Cell Biology Laboratory, Physiology Laboratory.


I have also taught lectures in Anatomy I and II, General Biology, and Forensic Science.



B. A. (Biology, Psychology) Berea College (1985)

M. S. (Neurophysiology) Florida State Univ. (1989)



My past research interests include human identification and the application of classical forensic serology techniques to modern RFLP and PCR-STR DNA typing techniques and refining classical forensic serology for modern applications.


I have supported research on antimicrobial proteins in insect Central Nervous Tissue(i.e. Lubber Grasshoppers)


I am presently researching the antimicrobial effects of sucralose (Splenda(R)) on the gut bacterial microbiome.


Selected Publications




Biology Laboratory Exercises – University of North Florida, Kendall-Hunt Publishing Inc. 1996. Joan Bray, Joseph Butler, Charles B. Coughlin, Darwin Coy, Maureen Mazza, Lillian Miller, Justina Wilcox


Enhanced axonal transport of gylcosaminoglycans in regenerating goldfish optic nerve. Charles Coughlin and John Elam. Brain Research- 493 (1989) 326-330


Differential Bacteriostatic Effects of Sucralose on Various Species of Environmental Bacteria. Arthur Omran, Ron Baker, Charles C. Brian Coughlin, ISRN Toxicology, vol. 2013, Article ID 415070, October, 2013.


Metabolic Effects of Sucralose on Environmental Bacteria. Arthur Omran, Gregory Ahearn, Doria Bowers, Janice Swenson and Charles Coughlin, Journal of Toxicology November 10, 2013




Differential Bacteriostatic and Bactericidal Effects of Sucralose on Various Species of Environmental Bacteria. Arthur Phillip Omran, and Charles Brian Coughlin, presented at the Southeastern Regional Meeting of the Society of Microbiology, November, 2012.


Differential Bacteriostatic Effects of Sucralose on Environmental Bacteria. Arthur Omran, Greg Ahearn and Charles Brian Coughlin, presented at the 2013 Experimental Biology Meeting in Boston Massachusetts April, 2013.

Sucralose causes a concentration dependent, metabolic inhibition of the gut flora Bacteroides,B. fragilis and B. uniformis not observed in the Firmicutes, E. faecalis and C. sordellii Scott M. Rettig, Jake E. Tenewitz, Gregory A. Ahearn, Charles B. Coughlin,  Poster presented at Experimental Biology 2014 Conference, April 26-29 2014