Keith A. Johnson

788 total citations
21 papers, 516 citations indexed

About

Keith A. Johnson is a scholar working on Spectroscopy, Psychiatry and Mental health and Physiology. According to data from OpenAlex, Keith A. Johnson has authored 21 papers receiving a total of 516 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Spectroscopy, 6 papers in Psychiatry and Mental health and 5 papers in Physiology. Recurrent topics in Keith A. Johnson's work include Mass Spectrometry Techniques and Applications (6 papers), Analytical chemistry methods development (5 papers) and Dementia and Cognitive Impairment Research (5 papers). Keith A. Johnson is often cited by papers focused on Mass Spectrometry Techniques and Applications (6 papers), Analytical chemistry methods development (5 papers) and Dementia and Cognitive Impairment Research (5 papers). Keith A. Johnson collaborates with scholars based in United States, Australia and United Kingdom. Keith A. Johnson's co-authors include I. Jonathan Amster, Dennis R. Dean, Jeffrey N. Agar, Michael K. Johnson, Jeverson Frazzon, Archer D. Smith, Thomas J. Porter, Jason C. Rouse, Marc F. J. M. Verhagen and Michael W. W. Adams and has published in prestigious journals such as Journal of the American Chemical Society, Analytical Chemistry and Analytical Biochemistry.

In The Last Decade

Keith A. Johnson

18 papers receiving 503 citations

Peers

Keith A. Johnson

RESE

SPECT

ECP

Tongzhou Li China

Manuela Lotierzo France

Vivian Chen United States

Jeffrey Johns Thailand

Megan Hogan Ireland

Yuko Araki Japan

Ping Zuo China

Célia Lourenço United Kingdom

Roy Wade United States

Florian Pitterl Austria

Tongzhou Li China

Keith A. Johnson

212 ×1.0

91 ×0.5

RESE

98 ×1.0

SPECT

13 ×0.1

25 ×0.3

ECP

Citations per year, relative to Keith A. Johnson Keith A. Johnson (= 1×) peers Tongzhou Li

Countries citing papers authored by Keith A. Johnson

Since Specialization

Citations

This map shows the geographic impact of Keith A. Johnson's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Keith A. Johnson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Keith A. Johnson more than expected).

Fields of papers citing papers by Keith A. Johnson

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Keith A. Johnson. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Keith A. Johnson. The network helps show where Keith A. Johnson may publish in the future.

Co-authorship network of co-authors of Keith A. Johnson

This figure shows the co-authorship network connecting the top 25 collaborators of Keith A. Johnson. A scholar is included among the top collaborators of Keith A. Johnson based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Keith A. Johnson. Keith A. Johnson is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ye, Rong, Pia Kivisäkk, Michael J Properzi, et al.. (2025). Plasma Phosphorylated Tau181 as a Biomarker for Alzheimer's Disease Co‐Pathology in Lewy Body Disease. Movement Disorders. 40(9). 1930–1939.

Devanarayan, Viswanath, Michael Donohue, Reisa A. Sperling, et al.. (2025). Multimodal prognostic modeling of individual cognitive trajectories to enhance trial efficiency in preclinical Alzheimer's disease. Alzheimer s & Dementia. 21(9). e70702–e70702. 2 indexed citations

Dhaynaut, Maëva, Cristina Lois, Bernard Hanseeuw, et al.. (2025). Quantitative Measurement of Tau Burden in a Dual-Time-Window Dynamic PET Imaging Protocol with [¹⁸F]MK6240. Journal of Nuclear Medicine. 66(8). 1299–1306.

Jutten, Roos J., Daniel Soberanes, Stephanie Hsieh, et al.. (2025). Detecting early cognitive deficits in preclinical Alzheimer’s disease using a remote digital multi-day learning paradigm. npj Digital Medicine. 8(1). 24–24. 2 indexed citations

Sperling, Reisa, Keith A. Johnson, Shobha Dhadda, et al.. (2025). Long‐term safety and efficacy of lecanemab in early Alzheimer's disease: Results from the clarity AD open‐label extension study. Alzheimer s & Dementia. 21(12). e70905–e70905.

Fu, Jessie Fanglu, Roos J. Jutten, Brian C. Healy, et al.. (2024). Elevated amyloid‐ß and tau burden is associated with accelerated cognitive decline on a digital clock drawing test in preclinical AD. Alzheimer s & Dementia. 20(S3). e089175–e089175. 2 indexed citations

Koops, Elouise A., Joyita Dutta, Bernard Hanseeuw, et al.. (2024). Elevated locus coeruleus metabolism provides resilience against cognitive decline in preclinical Alzheimer's disease. Alzheimer s & Dementia. 21(1). e14385–e14385. 3 indexed citations

Johnson, Keith A., Christopher J. Gordon, Julia L. Chapman, et al.. (2021). The association of insomnia disorder characterised by objective short sleep duration with hypertension, diabetes and body mass index: A systematic review and meta-analysis. Sleep Medicine Reviews. 59. 101456–101456. 90 indexed citations

Miller, Christopher B., David J. Robertson, Keith A. Johnson, et al.. (2019). Tired and lack focus? Insomnia increases distractibility. Journal of Health Psychology. 26(6). 795–804. 6 indexed citations

10.

Johnson, Keith A., Christopher J. Gordon, & Ronald R. Grunstein. (2019). Somatic symptoms are associated with Insomnia disorder but not Obstructive Sleep Apnoea or Hypersomnolence in traumatic brain injury. Neurorehabilitation. 45(3). 409–418. 4 indexed citations

11.

Johnson, Keith A., et al.. (2006). Cation exchange–HPLC and mass spectrometry reveal C-terminal amidation of an IgG1 heavy chain. Analytical Biochemistry. 360(1). 75–83. 97 indexed citations

12.

Ding, Wei, Keith A. Johnson, Charles Kutal, & I. Jonathan Amster. (2003). Mechanistic Studies of Photochemical Reactions with Millisecond Time Resolution by Electrospray Ionization Mass Spectrometry. Analytical Chemistry. 75(17). 4624–4630. 16 indexed citations

13.

Ding, Wei, Keith A. Johnson, I. Jonathan Amster, & Charles Kutal. (2001). Identification of Photogenerated Intermediates by Electrospray Ionization Mass Spectrometry. Inorganic Chemistry. 40(27). 6865–6866. 8 indexed citations

14.

Johnson, Keith A., et al.. (2001). Chemical and On-Line Electrochemical Reduction of Metalloproteins with High-Resolution Electrospray Ionization Mass Spectrometry Detection. Analytical Chemistry. 73(4). 803–808. 33 indexed citations

15.

Smith, Archer D., Jeffrey N. Agar, Keith A. Johnson, et al.. (2001). Sulfur Transfer from IscS to IscU: The First Step in Iron−Sulfur Cluster Biosynthesis. Journal of the American Chemical Society. 123(44). 11103–11104. 161 indexed citations

16.

Johnson, Keith A. & I. Jonathan Amster. (2001). First observation by mass spectrometry of a 3+ oxidation state for a [4Fe-4S] metalloprotein: An ESI-FTICR mass spectrometry study of the high potential iron-sulfur protein from Chromatium vinosum. Journal of the American Society for Mass Spectrometry. 12(7). 819–825. 13 indexed citations

17.

Johnson, Keith A., Phillip S. Brereton, Marc F. J. M. Verhagen, et al.. (2001). A Gallium-Substituted Cubane-Type Cluster in Pyrococcus furiosus Ferredoxin. Journal of the American Chemical Society. 123(32). 7935–7936. 4 indexed citations

18.

Johnson, Keith A., Marc F. J. M. Verhagen, Michael W. W. Adams, & I. Jonathan Amster. (2001). Differences between positive and negative ion stabilities of metal–sulfur cluster proteins: an electrospray ionization fourier transform ion cyclotron resonance study. International Journal of Mass Spectrometry. 204(1-3). 77–85. 11 indexed citations

19.

Johnson, Keith A., Marc F. J. M. Verhagen, Phillip S. Brereton, Michael W. W. Adams, & I. Jonathan Amster. (2000). Probing the Stoichiometry and Oxidation States of Metal Centers in Iron−Sulfur Proteins Using Electrospray FTICR Mass Spectrometry. Analytical Chemistry. 72(7). 1410–1418. 61 indexed citations

20.

Braam, Janet, Melissa L. Sistrunk, Diana H. Polisensky, et al.. (1996). Life in a changing world: TCH gene regulation of expression and responses to environmental signals. Physiologia Plantarum. 98(4). 909–916. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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