Limbach Group Alumni


Group out in NewportDaisy at CGSA Award RecognitionThe Group at ASMS in 2005Annual Crawfish Boil1998 Group PhotoDa' Group with the Recent PhDsThe girls with Tracey2013 Group PhotoSoheil, Daisy and Callie in San AntonioGroup at ASMS 20111999 Group PhotoBeniam, Stephen and ZhaojingCallie at Grad Poster Forum2005 PhD GraduatesGroup Holiday Party - 2013

Limbach Group Alumni
You can directly support the lab and meet your UC annual pledge at the same time. When making your pledge or one-time donation, designate your gift to the“UC Department of ChemistryBio-mass Spectrometry Fund - F100749”. Your gift will then be used by the lab to support undergraduate and graduate student travel to meetings and conferences. Thank You!

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Former Graduate Students

Siwei LiPh.D. December 2013. “High Throughput Automated Comparative Analysis of RNA Using Isotope Labeling and LC-MS/MS” Current Position: Postdoctoral Scientist University of Michigan
Romel DatorPh.D. December 2013. “Characterization of Ribosomes and Ribosome Assembly Complexes by Mass Spectrometry” Current Position: Postdoctoral Fellow University of Washington
Wunan ShiM.S. August 2013. “High-Throughput De Novo Sequencing of Transfer RNAs Using Liquid Chromatography-Tandem Mass Spectrometry” Current Position: Staff Scientist Eli Lilly
Rebecca RohlfsPh.D., April 2013. “Mass Spectrometry Analysis of Methylated Ribosomal RNA” Current Position: Senior Scientist at Merial.
Susan RussellPh.D., December 2012. “Characterizing Modified Nucleosides in RNA by LC/UV/MS” Current Position: Scientist/Analytical Group Leader at Sirrus, Inc.
Brittany CatronPh.D., June 2012. “Analysis of Protein:RNA Cross-links by Inductively Coupled Plasma Mass Spectrometry and Tandem Mass Spectrometry” Current Position: NIST NRC Postdoctoral Fellow. (Co-advisor Prof. Joe Caruso).
Tiffany HilsonM.S., June 2012. “Developing and Optimizing a Mass Spec-Friendly Protocol for Fractionation of tRNAs Through Two Dimensional Polyacrylamide Gel Electrophoresis” Current Position: Technical Scientist at Patheon Pharmaceuticals
Kady KrivosPh.D., June 2011. “Analysis of RNA: Peptide Heteroconjugates by Electron Induced Dissociation Mass Spectrometry” Current Position: Staff Scientist at Procter & Gamble
Colette CastleberryPh.D., December 2009. “Quantitative Identification of Non-coding RNAs by Isotope Labeling and LC-MS/MS” Current Position: Staff Scientist at Coca-Cola.
Daisy-Malloy HamburgPh.D., June 2008. “Biochemical and MALDI-MS Methods for Characterization of Ribosomal Proteins” Current Position: Senior Scientist at Merck.
Mahmud HossainPh.D., June 2008. “Characterization of Non-protein-coding Nucleic Acids by their Signature Digestion Products and Mass Spectrometry” Current Position:Senior Scientist at Merck.
Soheil PourshahianPh.D., June 2008. “Characterization of Ribonucleoproteins by Cross-linking and Mass Spectrometry” Last Known Position: Staff Scientist at Girindus.
Anita DurairajPh.D., December 2007. “Improved Identification of the Post-transcriptionally Modified Nucleoside, Pseudouridine, in RNAs” Current Position: Post-doctoral Research Associate, Penn State University.
Samuel WashingtonPh.D., May 2007. “Chemical Differences of Atherosclerotic Plaques in Native and Bypass Human Coronary Arteries and Diseased and Non-diseased Human Aortas” Current Position: Scientist at Center for Energy and Enviromental Studies, Southern University. (Co-advisor Prof. Isiah Warner).
C. Callie CoombsM.S., June 2006. “Developing Liquid Chromatography and Mass Spectrometry Approaches for Studying Posttranscriptional Modifications in Small RNAs” Current Position: Memorial Sloan Kettering Cancer Center Hematology/Oncology Fellowship
Justin MecomberPh.D., June 2006. “Fabrication and Chemical Modification of Polymer Microchip Devices Suitable for Mass Spectrometry” Current Position: Associate (Senior Scientist) at W.L. Gore.
Wendy DominickPh.D., June 2006. “Enzyme Immobilization on Poly(Methylmethacrylate) (PMMA) Surfaces” Current Position: Senior Research Associate, University of Cincinnati Proteomics Core Facility.
Chad RobinsPh.D., June 2005. “Nonpolar Matrices for Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry” Current Position: Staff Scientist, Phillips Petroleum.
Moojin SuhPh.D., March 2005. “Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Bacterial Ribosomal Proteins and Ribosomes” Current Position: Staff Scientist, J. Craig Venter Institute.
Rama TummalaPh.D., December 2004. “The Use of Surfactant-Aided Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry in Proteomics” Current Position: Staff Scientist, Baxter Healthcare Inc.
Zhaojing MengPh.D., December 2004. “Towards High-Throughput Sequencing of RNA Using Mass Spectrometry” Current Position: Staff Scientist, SAIC-Frederick, National Cancer Institute.
Beniam BerhanePh.D., June 2003 “Rapid Characterization of Posttranscriptional Modifications in RNA Using Matrix-assisted Laser Desorption/Ionization Mass Spectrometry and Matrix-assisted Laser Desorption/Ionization Post Source Decay Mass Spectrometry” Current Position: Director of Mass Spectrometry Facility at University of California at Irvine.
Kemberly PattesonPh.D., June 2003 “Analysis of the Mass Silent Posttranscriptional Modification Pseudouridine in RNA by Mass Spectrometry” Current Position:Staff Scientist, BD Biosciences.
Stephen F. MachaPh.D., May 2001 “Analysis of Hydrocarbon Materials by Use of Nonpolar Matrices in Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS)” Current Position: Co-Director, Department of Chemistry/University Mass Spectrometry Facility, University of Cincinnati.
Tracey A. SimmonsPh.D., May 2001 “Improved Matrix-Assisted Laser Desorption/Ionization Linear Time-of-Flight Mass Spectrometry of Oligonucleotides and Nucleic Acids Via Matrix Additives and Sample Preparatory Technique” NIH Predoctoral Fellowship 1999–2000. Current Position: Stay at home mom.
Victor E. VandellPh.D., May 2000 “New Developments in Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry of Oligonucleotides and Nucleic Acids” Current Position: Senior Applications Chemisty with Biotage.
Kari B. Green-ChurchPh.D., December 1999 “Mass Spectrometry of Biomolecules. Part A: Gas-Phase Thermochemical and Structure Determinations of Mononucleotides. Part B: Analysis of Hydrophobic Peptides and Proteins by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry” Current Position: Research Scientist and Director Mass Spectrometry Services Facility at The University of Florida.
Lenore M. PoloPh.D., May 1999 “The Characterization of Oligonucleotides and Nucleic Acids Using RNase H and Mass Spectrometry” Board of Regents Fellow, 1994–1998. ACS Division of Analytical Chemistry Summer Fellowship Sponsored by SACP, 1998. NIH Postdoctoral Fellow at University of Miami, Miami, FL. Current Position: Professor Chemistry and Vice Provost for Student Achievement, Miami-Dade College.


Post-Graduate Researchers/Visiting Scholars

Prof. Balu AddepalliResearch Scientist 2008 - 2013; Currently Assistant Professor Research in UC Department of Chemistry
Dr. Kirk GastonPostdoctoral Research Associate 2010 - 2014; Currently Research Scientist
at the Food and Drug Administration (FDA).
Daniel HorneVisiting Scholar 2012
Annika Butterer Visiting Scholar 2010
Dr. Anne McLachlanResearch Associate 2004 - 2010
Dr. Irena Nikcevic, Postdoctoral Research Associate 2008 - 2009. Currently Staff Scientist at Merck.
Dr. Lianji JinPostdoctoral Research Associate 2002 - 2004. Currently Senior Staff Scientist at the Food and Drug Administration (FDA).
Dr. Stephen F. MachaPostdoctoral Research Associate 2001 - 2002. Currently co-director of University Mass Spectrometry Facility, University of Cincinnati.
Dr. Chau-Wen ChouPostdoctoral Research Associate 1997 - 1999. Currently Assistant Professor Research and Director of Proteomics Core Facility, Louisiana State University Health Sciences Center.


Undergraduate Researchers @ UC

Aaron Hirsch 2015 capstone
Morgan Restaino 2015 capstone
Angela Galli 2015 capstone
Kyle George 2015 capstone
Ronny Ipach 2015
Tom Kohorst 2015 capstone
Danielle Marler 2015 capstone
Lauren Schultz 2015 - present
Mallory Smith 2015 capstone
Amber Volmer 2015 capstone
Jacquelyn Barry 2014 capstone
Asefa Dinagde 2014 capstone
Ismail Gunacar 2014 capstone
Courtney Collins 2014 - present
Mathew Pflanz 2014 - present; capstone completed in 2014; also awarded summer 2014 departmental fellowship
Sarah Venus 2013 -present; capstone completed in 2014
Kathryn Marcus 2014 capstone
Matthew Bergmann 2014 capstone
Chelsea Burns 2014 capstone

William Judd 2014 capstone
Lucas Hendrixson 2014 capstone
Chelsea Mathews 2014 capstone
Karen Rahe 2014 capstone and summer 2014 departmental fellowship
Sruthi Kesanam 2013 capstone
Kim Nguyen 2013 capstone
Michael English 2012
Rebekka Meeks 2012
Summer Payton 2011 capstone
Jared Warncke 2011 capstone
Brittani Nicolaci 2010 - 2011
Maggie Zorc 2010 - 2011; also Summer 2010 WISE student
Andrew Allison 2010 - 2011
Rachel Helpling 2009 - 2010; also Summer 2009 WISE student
Katherine Kirschner 2008 - 2009; also Summer 2008 WISE student
Rhonda Collins 2007 - 2008
Yasmine Noujam 2007 - 2008; also Summer 2007 WISE student
Nicolas Bodmer 2007
Collin Wetzel 2005 - 2006
David Nieves 2002 - 2003


Other Group Members @ UC

Sabrina Cramer 2012
Erica Beck 2011
Jessica Kotha 2009 - 2011
Jordan Callahan 2010 - 2011
Emily Niehaus 2009
April Dupre 2003 - 2007
Salane King 2005 - 2006
Nathan Hall 2002 - 2005



Undergraduate Researchers - Summer Programs

NSF Research Experience for Undergraduates (REU), Howard Hughes Medical Institute (HHMI), Louisiana Alliance for Minority Participation in Science (LAMP), Women in Science and Engineering (WISE) or ACS Project Seed Summer Students

Natalie DeWitte, Trinity University, NSF REU student summer 2014.
Nick Lesner, Wooster College, NSF REU student summer 2014 (with Prof. Addepalli).
Bethel Tekaligne, University of Cincinnati WISE student summer 2013 (with Prof. Addepalli).
Zelaya Meadows, Northwestern University, NSF REU student summer 2010.
Thomas Riffelmacher, Germany, NSF REU student summer 2010.
Maggie Zorc, University of Cincinnati, WISE student summer 2010.
Rachel Helpling, University of Cincinnati, WISE student summer 2009.
Annika Butterer, Germany, NSF REU student summer 2009.
Kim (Nikki) Reishus, Taylor University, NSF REU student summer 2009.
Katherine Kirschner, University of Cincinnati, WISE student summer 2008.
Kathleen Lilleness, Whitworth University, NSF REU student summer 2008.
Yasmine Noujam, University of Cincinnati, WISE student summer 2007.
Rachel Selby, Rose Hulman Institute, NSF REU student summer 2007.
Cassandra Dees, Winton Hills High School, Cincinnati, ACS Project Seed student summer 2004 and 2005.
Phillip Heilers, Ball State University, NSF REU student summer 2005.
Ben Kissling, University of Nebraska, NSF REU student summer 2003.
Carl Murphy, Bradley University, NSF REU student summer 2002.
Melissa Bailey, Louisiana State University, LAMP student summer 1999 & 2000.
Lisa Welp, Indiana University, NSF REU student summer 1999.
Jessica Ragas, Louisiana State University, HHMI student summer 1999.
Kelli Kuhnle, Old Dominion University, NSF REU student summer 1999.
Gary Breaux, Louisiana State University, NSF REU student summer 1999.
Shandolyn Story, Louisiana State University, HHMI student summer 1998.
Amy France, Western Kentucky University, NSF REU student summer 1998.
Connie Saunders, Mary Baldwin College, NSF REU student summer 1997.
Dorothy Lewis, Xavier University, NSF REU student summer 1996.
Daryl Crenshaw, Xavier University, NSF REU student summer 1995.

Undergraduate Researchers @ LSU

Paige Tarver, (B.S. in Chemical Engineering 2003)
Tasha Lamotte, (B.S. in Chemistry 2003)
Lisa Ballard, (B.S. in Biochemistry 2003)
Courtney Patrick, (B.S. in Microbiology 2002)
Erica Williams, (B.S. in Biochemistry 2002)
Kerri Argyle, (B.S. in Chemistry 2001)
Amy Lepari, (B.S. in Chemistry 2001)
Melissa Griggs, (B.S. in Chemistry 2001)
Melissa Bailey, (B.S. in Chemistry 2001)
Jessica Ragas, (B.S. in Biochemistry 2001)
Shannon Mienvielle, (B.S. in Chemistry 2000)
Gary Breaux, (B.S. in Chemistry 2000)
Weizhe Chu, (B.S. Chemistry 1999)
Ashanta Brown, (B.S. Chemistry/Chemical Engineering 1999)
Tung Vu, (B.S. Chemistry 1995)

Patrick Limbach, University of Cincinnati 2017
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