Keith A. Johnson

788 citations

21 papers · 516 indexed · h-index 9

Renewable Energy, Sustainability and the Environment top 10%
- Metalloenzymes and iron-sulfur proteins 3
Experimental and Cognitive Psychology top 10%
- Sleep and related disorders 3
Nutrition and Dietetics top 10%
Spectroscopy top 10%
- Mass Spectrometry Techniques and Applications 6
- Analytical Chemistry and Chromatography 3
- Advanced Proteomics Techniques and Applications 2
Endocrine and Autonomic Systems
Analytical Chemistry
- Analytical chemistry methods development 5
Psychiatry and Mental health
- Dementia and Cognitive Impairment Research 5
Physiology
- Alzheimer's disease research and treatments 4

Co-authors: I. Jonathan Amster Dennis R. Dean Jeffrey N. Agar Michael K. Johnson Jeverson Frazzon Archer D. Smith Thomas J. Porter Jason C. Rouse
Cited by: Renewable Energy, Sustainability and the Environment Experimental and Cognitive Psychology Nutrition and Dietetics
Journals: Journal of the American Chemical Society (2 papers)Analytical Chemistry (3 papers)Analytical Biochemistry (1 paper)
Partner nations: United States Australia United Kingdom

In The Last Decade

Keith A. Johnson

18 papers receiving 503 citations

Peers

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

The 25 scholars most cited alongside Keith A. Johnson, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Keith A. Johnson Line = papers co-authored together Keith A. Johnson links everyone, so they are left out of the graph.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

#	Work
1	Plasma Phosphorylated Tau181 as a Biomarker for Alzheimer's Disease Co‐Pathology in Lewy Body Disease Movement Disorders ·Rong Ye,Pia Kivisäkk,Anna E. Goodheart,Hadia Fatima,Erin Peterec,Emma G. Thibault,Michael J Properzi,Keith A. Johnson,Steven E. Arnold,Stephen N. Gomperts	2025	0
2	Multimodal prognostic modeling of individual cognitive trajectories to enhance trial efficiency in preclinical Alzheimer's disease Alzheimer s & Dementia ·Viswanath Devanarayan,Michael Donohue,Reisa A. Sperling,Keith A. Johnson,Yuanqing Ye,Arnaud Charil,T. Doherty,Lü Tian,Rema Raman,Paul Aisen,Lynn D. Kramer,Michael C. Irizarry,Shobha Dhadda	2025	2
3	Quantitative Measurement of Tau Burden in a Dual-Time-Window Dynamic PET Imaging Protocol with [¹⁸F]MK6240 Journal of Nuclear Medicine ·Ye Xia,Maëva Dhaynaut,Yanis Chemli,Cristina Lois,Bernard Hanseeuw,Emma G. Thibault,Colin Groot,Rik Ossenkoppele,Keith A. Johnson,Georges El Fakhri,Marc D. Normandin,Nicolas J. Guehl	2025	0
4	Detecting early cognitive deficits in preclinical Alzheimer’s disease using a remote digital multi-day learning paradigm npj Digital Medicine ·Roos J. Jutten,Daniel Soberanes,Cassidy Molinare,Stephanie Hsieh,Michelle E. Farrell,Aaron P. Schultz,Dorene M. Rentz,Gad A. Marshall,Keith A. Johnson,Reisa A. Sperling,Rebecca E. Amariglio,Kathryn V. Papp	2025	2
5	Long‐term safety and efficacy of lecanemab in early Alzheimer's disease: Results from the clarity AD open‐label extension study Alzheimer s & Dementia ·Christopher H. van Dyck,Reisa Sperling,Keith A. Johnson,Shobha Dhadda,Michio Kanekiyo,David Li,Michelle Gee,Steven M. Hersch,Michael C. Irizarry,Lynn D. Kramer	2025	0
6	Elevated amyloid‐ß and tau burden is associated with accelerated cognitive decline on a digital clock drawing test in preclinical AD Alzheimer s & Dementia ·Jessie Fanglu Fu,Talia L. Robinson,Marina Álvarez Alonso,Adela Francis Malave,Roos J. Jutten,Brian C. Healy,Grace A Del Carmen Montenegro,Emma G. Thibault,Dana L. Penney,Randall Davis,Reisa A. Sperling,Keith A. Johnson,Julie C. Price,Dorene M. Rentz	2024	2
7	Elevated locus coeruleus metabolism provides resilience against cognitive decline in preclinical Alzheimer's disease Alzheimer s & Dementia ·Elouise A. Koops,Joyita Dutta,Bernard Hanseeuw,J. Alex Becker,Maxime Van Egroo,Prokopis C. Prokopiou,Julie C. Price,Steven E. Arnold,Reisa A. Sperling,Keith A. Johnson,Heidi I.L. Jacobs,(unknown)	2024	3
8	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 ·Keith A. Johnson,Christopher J. Gordon,Julia L. Chapman,Camilla M. Hoyos,Nathaniel S. Marshall,Christopher B. Miller,Ronald R. Grunstein	2021	90
9	Tired and lack focus? Insomnia increases distractibility Journal of Health Psychology ·Christopher B. Miller,David J. Robertson,Keith A. Johnson,Nicole Lovato,Delwyn J. Bartlett,Ronald R. Grunstein,Christopher J. Gordon	2019	6
10	Somatic symptoms are associated with Insomnia disorder but not Obstructive Sleep Apnoea or Hypersomnolence in traumatic brain injury Neurorehabilitation ·Keith A. Johnson,Christopher J. Gordon,Ronald R. Grunstein	2019	4
11	Cation exchange–HPLC and mass spectrometry reveal C-terminal amidation of an IgG1 heavy chain Analytical Biochemistry ·Keith A. Johnson,Kari Paisley-Flango,Bruce S. Tangarone,Thomas J. Porter,Jason C. Rouse	2006	97
12	Mechanistic Studies of Photochemical Reactions with Millisecond Time Resolution by Electrospray Ionization Mass Spectrometry Analytical Chemistry ·Wei Ding,Keith A. Johnson,Charles Kutal,I. Jonathan Amster	2003	16
13	Identification of Photogenerated Intermediates by Electrospray Ionization Mass Spectrometry Inorganic Chemistry ·Wei Ding,Keith A. Johnson,I. Jonathan Amster,Charles Kutal	2001	8
14	Chemical and On-Line Electrochemical Reduction of Metalloproteins with High-Resolution Electrospray Ionization Mass Spectrometry Detection Analytical Chemistry ·Keith A. Johnson,Brian A. Shira,James L. Anderson,I. Jonathan Amster	2001	33
15	Sulfur Transfer from IscS to IscU: The First Step in Iron−Sulfur Cluster Biosynthesis Journal of the American Chemical Society ·Archer D. Smith,Jeffrey N. Agar,Keith A. Johnson,Jeverson Frazzon,I. Jonathan Amster,Dennis R. Dean,Michael K. Johnson	2001	161
16	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 ·Keith A. Johnson,I. Jonathan Amster	2001	13
17	A Gallium-Substituted Cubane-Type Cluster in Pyrococcus furiosus Ferredoxin Journal of the American Chemical Society ·Keith A. Johnson,Phillip S. Brereton,Marc F. J. M. Verhagen,Luigi Calzolai,Gerd N. La Mar,Michael W. W. Adams,I. Jonathan Amster	2001	4
18	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 ·Keith A. Johnson,Marc F. J. M. Verhagen,Michael W. W. Adams,I. Jonathan Amster	2001	11
19	Probing the Stoichiometry and Oxidation States of Metal Centers in Iron−Sulfur Proteins Using Electrospray FTICR Mass Spectrometry Analytical Chemistry ·Keith A. Johnson,Marc F. J. M. Verhagen,Phillip S. Brereton,Michael W. W. Adams,I. Jonathan Amster	2000	61
20	Life in a changing world: TCH gene regulation of expression and responses to environmental signals Physiologia Plantarum ·Janet Braam,Melissa L. Sistrunk,Diana H. Polisensky,Wei Xu,Mary M. Purugganan,Danuta Maria Antosiewicz,Paul Campbell,Keith A. Johnson	1996	1

About Keith A. Johnson

Keith A. Johnson is a scholar working on Analytical Chemistry, Psychiatry and Mental health and Spectroscopy, having authored 21 papers that have together received 516 indexed citations. Recurring topics across this work include Mass Spectrometry Techniques and Applications (6 papers), Analytical chemistry methods development (5 papers), Dementia and Cognitive Impairment Research (5 papers), Alzheimer's disease research and treatments (4 papers), Analytical Chemistry and Chromatography (3 papers), Sleep and related disorders (3 papers), Metalloenzymes and iron-sulfur proteins (3 papers) and Advanced Proteomics Techniques and Applications (2 papers). The work is most often cited by research in Renewable Energy, Sustainability and the Environment (181 citations), Experimental and Cognitive Psychology (81 citations) and Nutrition and Dietetics (95 citations). Keith A. Johnson has collaborated with scholars based in United States, Australia and United Kingdom. Frequent 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. Their work appears in journals such as Journal of the American Chemical Society, Analytical Chemistry and Analytical Biochemistry.

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.

Explore authors with similar magnitude of impact