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Hale, O. J., Ryumin, P., Brown, J. M., Morris, M. and Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (2020) Production and analysis of multiply charged negative ions by liquid atmospheric pressure matrix-assisted laser desorption/ionization mass spectrometry. Rapid Communications in Mass Spectrometry, 35 (S1). ISSN 1097-0231 doi: https://doi.org/10.1002/rcm.8246

Ryumin, P. and Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (2018) The composition of liquid atmospheric pressure matrix-assisted laser desorption/ionization matrices and its effect on ionization in mass spectrometry. Analytica Chimica Acta, 1013. pp. 43-53. ISSN 1873-4324 doi: https://doi.org/10.1016/j.aca.2018.01.070

Ryumin, P., Brown, J., Morris, M. and Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (2017) Protein identification using a nanoUHPLC-AP-MALDI MS/MS workflow with CID of multiply charged proteolytic peptides. International Journal of Mass Spectrometry, 416. pp. 20-28. ISSN 1387-3806 doi: https://doi.org/10.1016/j.ijms.2016.12.006

Castelletto, V., Ryumin, P., Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511, Hamley, I. W. ORCID: https://orcid.org/0000-0002-4549-0926, Taylor, M., Allsop, D., Reza, M., Ruokolainen, J., Arnold, T., Hermida-Merino, D., Garcia, C. I., Leal, M. C. and Castaño, E. (2017) Self-assembly and anti-amyloid cytotoxicity activity of amyloid beta peptide derivatives. Scientific Reports, 7. 43637. ISSN 2045-2322 doi: https://doi.org/10.1038/srep43637

Ryumin, P., Brown, J., Morris, M. and Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (2016) Investigation and optimization of parameters affecting the multiply charged ion yield in AP-MALDI MS. Methods, 104. pp. 11-20. ISSN 1046-2023 doi: https://doi.org/10.1016/j.ymeth.2016.01.015

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Ryumin, P. and Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (2016) Efficient production of multiply charged MALDI ions. In: Cramer, R. ORCID: https://orcid.org/0000-0002-8037-2511 (ed.) Advances in MALDI and Laser-Induced Soft Ionization Mass Spectrometry. Springer, pp. 37-47. ISBN 9783319048185 doi: https://doi.org/10.1007/978-3-319-04819-2_2