Jonathan J. Helmus

Publications

23. V. Louf, A. Protat, R. C. Jackson, S. M. Collis, J. Helmus UNRAVEL: A robust modular velocity dealiasing technique for Doppler radar, Journal of Atmospheric and Oceanic Technology 2020, 37 (5), 741-758, [doi]

22. T. Theint, P. S. Nadaud, D. Aucoin, J. J. Helmus, S. P. Pondaven, K. Surewicz, W. K. Surewicz, C. P. Jaroniec Species-dependent structural polymorphism of Y145Stop prion protein amyloid revealed by solid-state NMR spectroscopy Nature communications 2017, 8 (1), 1-10, [doi]

21. P. Altube, J. Bech, O. Argemí, T. Rigo, N. Pineda, S. Collis, J. Helmus Correction of dual-PRF Doppler velocity outliers in the presence of aliasing, Journal of Atmospheric and Oceanic Technology 2017, 34 (7) 1529-1543 [doi]

20. Wenbin He, Xiaotong Liu, Han-Wei Shen, Scott M Collis, Jonathan J Helmus Range likelihood tree: A compact and effective representation for visual exploration of uncertain data sets 2017 IEEE Pacific Visualization Symposium (PacificVis), 2017, 151-160, [doi]

19. J.J. Helmus, S.M. Collis. The Python ARM Radar Toolkit (Py-ART), a Library for Working with Weather Radar Data in the Python Programming Language, Journal of Open Research Software 2016, 4 (1), p.e25. [doi]

18. H. Guo, W. He, T. Peterka, H. Shen, S. Collis, J. Helmus. Finite-Time Lyapunov Exponents and Lagrangian Coherent Structures in Uncertain Unsteady Flows IEEE Transactions on Visualization and Computer Graphics 2016, 22 (6), 1672-1682. [doi]

17. M. van Lier-Walqui, A.M. Fridlind, A. S. Ackerman, S. Collis, J. Helmus, D. R. MacGorman, K. North, P. Kollias, D. J. Posselt. On polarimetric radar signatures of deep convection for model evaluation: columns of specific differential phase observed during MC3E, Monthly Weather Review 2015, 144, 737-758. [doi]

16. M. Heistermann, S. Collis, M.J. Dixon, J.J. Helmus, A. Henja, D.B. Michelson, T. Pfaff. An Open Virtual Machine for Cross-Platform Weather Radar Science, Bull. Amer. Meteor. Soc. 2015, 96 (10) 1641-1645. [doi]

15. M. Heistermann, S. Collis, M.J. Dixon, S. Giangrande, J.J. Helmus, B. Kelley, J. Koistinen, D.B. Michelson, M. Peura, T. Pfaff, D.B. Wolff, The Emergence of Open-Source Software for the Weather Radar Community, Bull. Amer. Meteor. Soc. 2015, 96 (1), 117-128. [doi]

14. J.J. Helmus, C.P. Jaroniec, Nmrglue: An open source Python package for the analysis of multidimensional NMR data, J. Biomol. NMR 2013, 55, 355-367. [doi] [pubmed]

13. I. Sengupta, P.S. Nadaud, J.J. Helmus, C.D. Schwieters, C.P. Jaroniec, Protein fold determined by paramagnetic magic-angle spinning solid-state NMR spectroscopy, Nature Chem. 2012, 4, 410-417. [doi] [pubmed]
•OSU Research News Article
•spectroscopyNOW.com Article

12. E.M. Jones, B. Wu, K. Surewicz, P.S. Nadaud, J.J. Helmus, S. Chen, C.P. Jaroniec, W.K. Surewicz, Structural polymorphism in amyloids: New insights from studies with Y145Stop prion protein fibrils, J. Biol. Chem. 2011, 286, 42777-42784. [doi] [pubmed]

11. J.J. Helmus, K. Surewicz, M.I. Apostol, W.K. Surewicz, C.P. Jaroniec, Intermolecular alignment in Y145Stop human prion protein amyloid fibrils probed by solid-state NMR spectroscopy, J. Am. Chem. Soc. 2011, 133, 13934-13937. [doi] [pubmed]

10. P.S. Nadaud, I. Sengupta, J.J. Helmus, C.P. Jaroniec, Evaluation of the influence of intermolecular electron-nucleus couplings and intrinsic metal binding sites on the measurement of ¹⁵N longitudinal paramagnetic relaxation enhancements in proteins by solid-state NMR, J. Biomol. NMR 2011, 51, 293-302. [doi] [pubmed]

9. P.S. Nadaud, J.J. Helmus, I. Sengupta, C.P. Jaroniec, Rapid acquisition of multidimensional solid-state NMR spectra of proteins facilitated by covalently bound paramagnetic tags, J. Am. Chem. Soc. 2010, 132, 9561-9563. [doi] [pubmed]

8. H. Shao, J. Seifert, N.C. Romano, M. Gao, J.J. Helmus, C.P. Jaroniec, D.A. Modarelli, J.R. Parquette, Amphiphilic self-assembly of an n-type nanotube, Angew. Chem. Int. Ed. 2010, 49, 7688-7691. [doi] [pubmed]

7. J.J. Helmus, K. Surewicz, W.K. Surewicz, C.P. Jaroniec, Conformational flexibility of Y145Stop human prion protein amyloid fibrils probed by solid-state nuclear magnetic resonance spectroscopy, J. Am. Chem. Soc. 2010, 132, 2393-2403. [doi] [pubmed]

6. P.S. Nadaud, J.J. Helmus, S.L. Kall, C.P. Jaroniec, Paramagnetic ions enable tuning of nuclear relaxation rates and provide long-range structural restraints in solid-state NMR of proteins, J. Am. Chem. Soc. 2009, 131, 8108-8120. [doi] [pubmed]

5. J.J. Helmus, K. Surewicz, P.S. Nadaud, W.K. Surewicz, C.P. Jaroniec, Molecular conformation and dynamics of the Y145Stop variant of human prion protein in amyloid fibrils, Proc. Natl. Acad. Sci. USA 2008, 105, 6284-6289. [doi] [pubmed]
•OSU Research News Article

4. J.J. Helmus, P.S. Nadaud, N. Höfer, C.P. Jaroniec, Determination of methyl ¹³C-¹⁵N dipolar couplings in peptides and proteins by three-dimensional and four-dimensional magic-angle spinning solid-state NMR spectroscopy, J. Chem. Phys. 2008, 128, 052314. [doi] [pubmed]

3. P.S. Nadaud, J.J. Helmus, C.P. Jaroniec, ¹³C and ¹⁵N chemical shift assignments and secondary structure of the B3 immunoglobulin-binding domain of streptococcal protein G by magic-angle spinning solid-state NMR spectroscopy, Biomol. NMR Assign. 2007, 1, 117-120. [doi] [pubmed] *Cover article.

2. P.S. Nadaud, J.J. Helmus, N. Höfer, C.P. Jaroniec, Long-range structural restraints in spin-labeled proteins probed by solid-state nuclear magnetic resonance spectroscopy, J. Am. Chem. Soc. 2007, 129, 7502-7503. [doi] [pubmed]

1. S. Giri, C.Gaebler, J. Helmus, M. Affatigato, S. Feller, M.A. Kodama, General study of packing in oxide glass systems containing alkali. J. Non-Crystalline Solids 2004, 347, 87-92. [doi]

Jonathan J. Helmus Ph.D.

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Publications