Ph.D., Applied Chemistry
Colorado School of Mines, Dept. of Chemistry and Geochemistry, 2014
B.S., Chemistry
University of Northern Colorado, Dept. of Chemistry, 2005
Osaka University, Osaka, Japan (2015 – 2018)
Research Assistant Professor:
- Successfully developed on-site helium isotope measurement method.
- Contributed to improving imaging mass spectrometry spatial resolution using conventional techniques.
- Tested a prototype detector for an outside company.
- Completed chemometric analysis of Pseudomonas aeruginosa clinical samples as part of an international collaborative project.
- Mentored students and taught a short courses on chemometrics and mass spectrometry.
Invited Researcher:
- Conducted research on an on-site cortisol measurement method.
- Successfully developed a novel mass calibration method for Time-of-Flight mass spectrometry.
Kelatron Corporation, Ogden, UT (2007 – 2008)
Analytical Scientist:
- Completed daily chemical analysis of production lots.
- Led a research project to adapt a conventional chemical analysis method to a different type of instrument.
Fresenius Medical Care, Ogden, UT (2006 – 2007)
Quality Systems Technician:
- Analyzed peritoneal dialysis solution production lots for standard quality.
- Determined purity of raw materials using wet chemistry techniques and ICP-AES.
Undergraduate Research Program, University of Northern Colorado (2005)
- Attempted to synthesize substituted fullerene compounds for stabilization of complex boron systems.
Graduate Research, Colorado School of Mines (2008-2014)
- Published papers on multivariate statistical analysis of bacterial mass spectral data for classification purposes and wrote basic data preparation software for the study in R and Python.
- Established a direct link between fuel additives and nitro compound production during diesel combustion.
- Successfully developed a fast lateral flow detection method for Bacillus anthracis.
- Analyzed illicit drug cutting agents in urine and tissue samples in a collaborative project with CU medical school.
- Short Course: Chemometrics (2018 & 2019)
- Short Course: Mass Spectrometry (2017)
- Chemistry Field Session (2013 – 2014)
- Organic Qualitative Analysis (2011 – 2014)
- Chemistry I TA with lecture experience (2009)
- Chemistry Lab I & II (2008-2009, 2013-2014)
Software & Programming:
- Statistical analysis using R and R Studio.
- Basic level Python and C++.
- Document preparation using LaTeX.
- Other scientific data analysis software such as Sigma Plot, MMass, and instrument proprietary data analysis tools.
- Linux (every day usage)
- Website development (Wordpress)
Hardware & Instrumentation:
- High performance PC assembly, maintenance, and troubleshooting.
- Fixing and maintaining scientific instrumentation; specifically mass spectrometers.
- FTIR, GC-MS, ICP-AES, AA, ESI-MS, EI-MS, MALDI-MS, MULTUM-MS.
Statistical Analysis:
- Principal component analysis.
- Linear discriminate analysis.
- SIMCA.
- K-nearest neighbor.
- Cross validation.
- Clustering techniques.
- Random forest.
Microbiology:
- BSL2 Aseptic technique.
- Bacteria plating, counting, and propagation.
- Bacteriophage propagation, storage, counting, and separation.
- English: native.
- Japanese: speaking (conversational), reading (can read with dictionary), writing (can write with dictionary).
1. Kawai Y, Hondo T, Jensen KR, Toyoda M, Terada K. Improved Quantitative Dynamic Range of Time-of-Flight Mass Spectrometry by Simultaneously Waveform-Averaging and Ion-Counting Data Acquisition. J Am Soc Mass Spectrom. 2018 Jul;29(7):1403–7. https://doi.org/10.1007/s13361-018-1967-1
2. Hondo T, Jensen KR, Aoki J, Toyoda M. A new approach for accurate mass assignment on a multi-turn time-of-flight mass spectrometer. Eur J Mass Spectrom. SAGE Publications Ltd STM; 2017 Aug 2;23(6):385–92. https://doi.org/10.1177/1469066717723755
3. Martin N, Lombard M, Jensen KR, Kelley P, Pratt T, Traviss N. Effect of biodiesel fuel on “real-world”, nonroad heavy duty diesel engine particulate matter emissions, composition and cytotoxicity. Sci Total Environ. Elsevier; 2017 May 15 [cited 2017 Dec 26];586:409–18. https://doi.org/10.1016/j.scitotenv.2016.12.041
4. Jensen KR, Hondo T, Sumino H, Toyoda M. Instrumentation and Method Development for On-Site Analysis of Helium Isotopes. Anal Chem [Internet]. 2017;89(14):7535–40. https://doi.org/10.1021/acs.analchem.7b01299
5. Ozeki M, Nozaki T, Aoki J, Bamba T, Jensen KR, Murakami S, et al. Metabolomic Analysis of Gingival Crevicular Fluid Using Gas Chromatography/Mass Spectrometry. Mass Spectrom. 2016;5(1):A0047–A0047. https://doi.org/10.5702/massspectrometry.A0047
6. Cody RB, McAlpin CR, Cox CR, Jensen KR, Voorhees KJ. Identification of bacteria by fatty acid profiling with direct analysis in real time mass spectrometry. Rapid Commun Mass Spectrom. 2015;29(21):2007–12. https://doi.org/10.1002/rcm.7309
7. Cox CR, Jensen KR, Mondesire RR, Voorhees KJ. Rapid detection of Bacillus anthracis by γ phage amplification and lateral flow immunochromatography. J Microbiol Methods. 2015;118:51–6. https://doi.org/10.1016/j.mimet.2015.08.011
8. Cox CR, Jensen KR, Saichek NR, Voorhees KJ. Strain-level bacterial identification by CeO2-catalyzed MALDI-TOF MS fatty acid analysis and comparison to commercial protein-based methods. Sci Rep. Nature Publishing Group; 2015;5(October 2014):10470. https://doi.org/10.1038/srep10470
9. Voorhees KJ, Saichek NR, Jensen KR, Harrington PB, Cox CR. Comparison of metal oxide catalysts for pyrolytic MOLI-MS bacterial identification. J Anal Appl Pyrolysis. 2015;113:78–83. https://doi.org/10.1016/j.jaap.2014.10.016
10. Jensen KR, Voorhees KJ, Dempsey EA, Burton J, Ratcliff MA, McCormick RL. Formation of 2,6-Di-tert-butyl-4-nitrophenol during Combustion of Diesel Fuel Antioxidant Precursors. Energy & Fuels. American Chemical Society; 2014 Nov 20;28(11):7038–42. http://dx.doi.org/10.1021/ef501043s
11. Jensen KR, Voorhees KJ. Analytical Applications of Electron Monochromator-Mass Spectrometry. Mass Spectrom Rev. 2013; https://doi.org/10.1002/mas.21395
12. Voorhees KJ, Jensen KR, McAlpin CR, Rees JC, Cody R, Ubukata M, et al. Modified MALDI MS fatty acid profiling for bacterial identification. J Mass Spectrom. 2013;48(7):850–5. https://doi.org/10.1002/jms.3215
1. Jensen KR; Hondo T; Kawai Y; Sumino H; Toyoda M. High-
Resolution Helium and Argon Isotope Analysis by Ion Counting in a
Small, Multi-Turn Time-of-Flight Mass Spectrometer. Proceedings of the
65th ASMS Conference on Mass Spectrometry and Allied Topics.
Indianapolis, Indiana. June 4 – 8, 2017. American Society of Mass
Spectrometry. Oral presentation.
2. Jensen KR; Sumino H; Hondo T; Toyoda M. Method Development
and Evaluation of the infiTOF Time-of-Flight Mass Spectrometer for On-
Site Helium Isotope Analysis. Proceedings of the 1st JpGU-AGU Joint
Meeting. Chiba, Japan, May 20 – 24, 2017. Japan Geoscience Union. Oral
presentation.
3. Jensen KR; Sumino H; Hondo T; Toyoda M. Instrumentation and
Method Development of On-Site Analysis Using a Multi-Turn Time-of-
Flight Mass Spectrometer. Proceedings of the 65 th Annual Conference on
Mass Spectrometry, Japan. Tsukuba, Japan, May 17 – 19, 2017. Mass
Spectrometry Society of Japan. Oral presentation.
4. Cox CR; Jensen, KR; Saichek, NR; Voorhees KJ. Strain-level
Bacterial ID by CeO 2-catalyzed MALDI-TOF MS Lipid Profiling and
Comparison to Protein-based Methods. 54th Interscience Conference on
Antimicrobial Agents and Chemotherapy. Washington, D.C., Sept. 5-9,
2014. American Society for Microbiology. Poster.
5. Jensen KR; McAlpin CR; Cox CR; Cody RB; Rees JC;
Voorhees KJ. Modified MALDI MS Fatty Acid Profiling for Bacterial
Identification. 61st Conference of Mass Spectrometry and Allied Topics.
Minneapolis, MN, June 9-13, 2013. American Society for Mass
Spectrometry. Poster.
6. Jensen KR; McCormick RL; Traviss N; Ratcliff MA; Voorhees KJ.
23rd Rocky Mountain Regional Meeting of the American Chemical
Society, Westminster, CO, United States, October 17-20; American
Chemical Society, 2012; p. RMRM–172. Oral presentation.
- American Chemical Society
- American Society of Mass Spectrometry
- National Society of Collegiate Scholars
- Japan Geoscience Union
- Mass Spectrometry Society of Japan
- Shorinji Kempo