Biemann Medal

The Biemann Medal recognizes significant achievement made in the early stages of a career.

Nominations are due November 30. Nomination Form (PDF fill-in form). The Biemann Medal is awarded to an individual early in his or her career in recognition of significant achievement in basic or applied mass spectrometry. The Biemann Medal was established by contributions from students, postdoctoral associates and friends to honor Professor Klaus Biemann.


  • Nominees must be within the first 15 years of receiving the PhD in the year nomination is considered. 
  • Eligibility is restricted to members of ASMS.

Nominations are held for three years so long as the date of PhD is still within the eligible range. The award is conferred at the ASMS Annual Conference with the presentation of a $5,000 cash award, the Biemann Medal, and the award lecture.

2017 Recipient:  Ryan Julian

JulianRyan Julian is awarded the 2017 Biemann Medal for contributions related to his work developing and exploiting photo-initiated gas phase radical ion chemistry to probe peptide and protein structure. Several applications that rely on this chemistry have been developed by Ryan’s lab including methods for (1) examining 3D protein structure in the gas phase, (2) site specific identification of Ser or Thr phosphorylation, (3) identification of Cys residues and disulfide pairs, (4) identification of peptide epimers, (5) oligosaccharide characterization, and (5) monitoring energy transfer with UV action spectra.

Prof. Julian has developed bond selective chemistry for initiating controllable radical directed dissociation (RDD). This is accomplished by photoexcitation with ultraviolet photons, leading to homolytic dissociation of specific bonds and the generation of a radical species. For example, photodissociation of carbon-iodine bonds with 266 nm photons occurs with high yield due to excitation of a dissociative excited state. If the carbon is covalently attached to a protein, then a radical is generated at that atom, and iodine radical is lost. The Julian lab has demonstrated that this chemistry can be used to create radicals in various types of biomolecules via dissociation of carbon-iodine, carbon-sulfur, and sulfur-sulfur bonds associated with numerous chromophores. Importantly, any of these bonds can be photodissociated regardless of molecular size, charge state, charge polarity, or sequence. The specificity inherent with this method allows for precise placement of an active radical in a controllable location, which can subsequently initiate fragmentation of the molecule via radical directed dissociation.

Dr. Julian is a professor in the Department of Chemistry at the University of California, Riverside.

Past Recipients

2017: Ryan Julian
2016: Kristina “Kicki” Håkansson
2015: Michael MacCoss
2014: Lingjun Li
2013: Yinsheng Wang
2012: Joshua J. Coon
2011: Bela Paizs
2010: David C. Muddiman
2009: Neil L. Kelleher
2008: Julia Laskin
2007: Roman A. Zubarev
2006: David Clemmer
2005: Gary J. Van Berkel
2004: John R. Yates
2003: Carol V. Robinson
2002: Ruedi Aebersold
2001: Peter B. Armentrout
2000: Julie A. Leary
1999: Matthias Mann
1998: Robert R. Squires
1997: Scott A. McLuckey