J. Brent Friesen

Physical Sciences
Office & Location:
Parmer 326
Office Phone:
(708) 524-6972
Email: Personal Website:

Job Title

Department Chair, Professor - Chemistry


I have been an instructor in the Rosary College of Arts and Sciences at Dominican University since the Fall of 1999. I enjoy teaching a variety of courses including Organic Chemistry I & II, Biochemistry, Forensic Science, General Chemistry I & II, and a Language, Arts & Sciences Junior seminar. The field of natural products chemistry has been the focus of my research. My research specialty is in liquid-liquid separation (chromatography) techniques. I am always looking for new ways to communicate chemical concepts to students. I am also interested in applying communication technology to make the learning experience better and more powerful. My leisure activities include being involved in my church, distance running, reading science fiction novels, and collecting energy drink cans.


BA, Chemistry, Bethel College, St. Paul, Minn.
PhD, Organic Chemistry, University of Minnesota, Minneapolis

Awards & Grants

Undergraduate Research:

Reduction of Methylcyclohexanone Positional Isomers
Ryan Keiffer, Fall 2014/Spring 2015

The Kinetics of Benzoin Synthesis from the Condensation of Benzaldehyde
Madeleine Clay, Fall 2013/Spring 2014

Investigation of the Chemical Composition and Bioactivity of Rue (Ruta graveolens) Extract
Gabriela Cossyleon, Fall 2013/Spring 2014

Investigation of the Chemical Constituents and Bioactivity of Sumac (Rhus glabra) Berry Extracts
Jennifer Lee, Fall 2013/Spring 2014

Synthesis of N-methylated Derivatives of p-Phenylenediamine and Investigation of Their E. coli Mutation Rates
Efstathia Maroulis, Spring 2014

View the full list of student projects

Recent Conference Presentations:

Qualitative and Quantitative Evaluation of Solvent Systems for Countercurrent Separation
CCC2014, London, England, July 23-25, 2014

Guessmix Evaluation of Chloroform and Dichloromethane-based Solvent Systems for Countercurrent Separations
CCC2014, London, England, July 23-25, 2014

Molecules and Mystery
Caritas & Veritas Symposium, Dominican University, September 24, 2013

Assigning Polarity and Selectivity Characteristics to Biphasic Solvent Systems for Countercurrent Chromatography
MUACC Midwest Universities Analytical Chemistry Conferences, September 27 – 29, 2012

Countercurrent Chromatography into the Mainstream
Hangzhou, China. January 2011

View the full list of conference presentations


Friesen JB, Ahmed S, Pauli GF “Qualitative and Quantitative Evaluation of Solvent Systems for Countercurrent Separation” Journal of Chromatography A 1377: 55-63 (2015)

Ramos Alvarenga R, Friesen JB, Nikolic D, Simmler C, Napolitano J, van Breemen R, Lankin D, McAlpine J, Pauli GF, SN Chen “K-Targeted Metabolomic Profiling Extends Chemical Subtraction to DESIGNER Extracts: Selective Depletion of Extracts of Hops (Humulus lupulus)” Journal of Natural Products 77: 2595-2604 (2014)

Pauli GF, Chen SN, Simmler C, Lankin D, Goedecke T, Jaki B, Friesen JB, McAlpine J, Napolitano J “The Importance of Purity Evaluation and the Potential of Quantitative 1H NMR as a Purity Assay” Journal of Medicinal Chemistry 57: 9220-9231 (2014)

Simmler C, Nikolic D, Lankin DC, Yu Y, Friesen JB, van Breemen RB, Lecomte A, Le Quemener C, Audo G, Pauli GF  “Orthogonal Analysis Underscores the Relevance of Primary and Secondary Metabolites in Licorice” Journal of Natural Products 77: 1806-1816 (2014)

Liu Y, Chen SN, McAlpine JB, Klein LL, Friesen JB, Lankin DC, Pauli G “Quantification of a Botanical Negative Marker without an Identical Standard: Ginkgotoxin in Ginkgo biloba” Journal of Natural Products 77: 611-617 (2014)

View the full list of publications


  • Organic Chemistry I
  • Organic Chemistry II
  • Organic Chemistry with a Biological Emphasis
  • Biochemistry
  • Natural Products Chemistry
  • Language Arts and Sciences Junior Seminar