J. Brent Friesen
![]()
Associate Professor of Chemistry
Department of Natural
Sciences,
Research Assistant
Professor
Department of Med.
Chemistry & Pharmacognosy,
(a)
Professional Preparation
(b) Appointments
1981-1982 Laboratory supervisor,
Chemistry Department,
1983-1985 Secondary Teacher:
Math and Physics,
1985-1987 Teacher Assistant, Department of
Chemistry,
1991-1992 Part-time Teaching Staff, Department of
Chemistry,
1992-1998 Visiting Professor,
1998-1998 Adjunct Professor,
1998-1999 Adjunct Professor,
1999-2006 Assistant Professor, Department of
Natural Sciences,
2006-present Associate Professor, Department of Natural
Sciences,
2003-present Adjunct Research Assistant Professor,
Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy,
University of Illinois, Chicago (IL)
(c) Publications
Friesen,
J.B.; Pauli, G.F.
Performance
Characteristics of Countercurrent Separation in Analysis of Natural Products of
Agricultural Significance.
J. Ag. Food Chem. 2008, 56,
19-28
Chen, S-N; Turner, A.; Jaki,
B.U.; Nikolic, D. ; van Breemen,
R.B. Friesen, J.B. ; Pauli, G.F.
An
Experimental Implementation of Chemical Subtraction.
J. of Pharm. Biomed.l Anal. 2008,
46, 692-698.
Friesen, J. B.; Pauli, G. F.
Reciprocal Symmetry Plots as a
Representation of Countercurrent Chromatograms.
Anal. Chem. 2007, 79,
2320-2324.
Berthod, A.*; Friesen, J. B.*;
Inui, T.; Pauli, G. F. [*equal contribution]
Elution-Extrusion Countercurrent Chromatography:
Theory and Concepts in Metabolic Analysis. Anal. Chem.
2007, 79, 3371-3382.
Friesen, J. B.;
Pauli, G.
Rational Development of
Solvent System Families in Counter-current Chromatography.
J. Chromatogr. A 2007,
1151, 51-59.
Friesen, J. B.; Pauli, G. F.
G.U.E.S.S. to Make Generally Useful Estimations of
Solvent Systems in Counter-current Chromatography.
J. Liq. Chromatogr. Relat.
Technol. 2005, 28, 2877-2808.
Friesen, J. B.; Burkhouse,
P. C.; Biesboer,
Influence of Alkaloid Precursors on the Alkaloid
Content of Nicotiana alata Root Cultures.
Phytochemistry 1992, 31, 3059-3063.
Couladis, M. M.; Friesen,
J. B.; Landgrebe, M. E.; Leete, E.
Chemistry of the Tropane
Alkaloids and Related Compounds. Part
47. Enzymes
Catalyzing the Reduction of Tropinone to Tropine and Pseudo-tropine
Isolated From the Roots of Datura
innoxia.
Phytochemistry 1991, 30, 801-805.
Friesen, J. B.;
Leete, E. Nicotine synthase.
An enzyme from Nicotiana
Species Which Catalyzes the Formation of (S)-Nicotine from Nicotinic
Acid and 1-Methyl-Δ'-pyrrolinium
Chloride. Tetrahedr. Lett. 1990, 31, 6295-6298.
(d) Synergistic Activities
1. Associate Editor of "TheLiquidPhase.Org", a web community
portal site dedicated to the proliferation of knowledge and good technique in
countercurrent separation science. Major contributor of
content.
2. Undergraduate research advisor for seven students (1999- present).
3. Community outreach through the Global Village Program
(2001-present) presenting science lessons to elementary students.
4. Chemistry Section of the Associated Colleges of the Chicago Area
(ACCA): past president and workshop presenter.
5. Development of web-based teaching methods in several courses of
general and organic chemistry, including posting of student work,
questions/messages, interactive content.