John H. Callahan

4.4k total citations · 1 hit paper
73 papers, 3.7k citations indexed

About

John H. Callahan is a scholar working on Spectroscopy, Biomedical Engineering and Materials Chemistry. According to data from OpenAlex, John H. Callahan has authored 73 papers receiving a total of 3.7k indexed citations (citations by other indexed papers that have themselves been cited), including 38 papers in Spectroscopy, 16 papers in Biomedical Engineering and 15 papers in Materials Chemistry. Recurrent topics in John H. Callahan's work include Mass Spectrometry Techniques and Applications (32 papers), Analytical Chemistry and Chromatography (15 papers) and Analytical chemistry methods development (12 papers). John H. Callahan is often cited by papers focused on Mass Spectrometry Techniques and Applications (32 papers), Analytical Chemistry and Chromatography (15 papers) and Analytical chemistry methods development (12 papers). John H. Callahan collaborates with scholars based in United States, China and Canada. John H. Callahan's co-authors include Mark M. Ross, Wayne G. Wamer, Weiwei He, Jun‐Jie Yin, Stephen W. McElvany, David Melka, Hyun‐Kyung Kim, Thomas E. Sutto, Paul C. Trulove and Jeffrey W. Gilman and has published in prestigious journals such as Science, Journal of the American Chemical Society and Accounts of Chemical Research.

In The Last Decade

John H. Callahan

70 papers receiving 3.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Photogenerated Charge Carriers and Reactive Oxygen Species in ZnO/Au Hybrid Nanostructures with Enhanced Photocatalytic and Antibacterial Activity

2013 770 citations John H. Callahan et al. Journal of the American Chemical Society profile →

Peers

John H. Callahan

SPECT

RESE

Grzegorz Schroeder Poland

D. O. Shah United States

Thatcher W. Root United States

Siva Umapathy India

Scott L. Wallen United States

Cun Li China

Pietro Calandra Italy

Jésus Raya France

Hideya Kawasaki Japan

Grzegorz Schroeder Poland

John H. Callahan

783 ×0.6

949 ×1.1

SPECT

1.4k ×1.8

317 ×0.6

RESE

418 ×0.7

Citations per year, relative to John H. Callahan John H. Callahan (= 1×) peers Grzegorz Schroeder

Countries citing papers authored by John H. Callahan

Since Specialization

Citations

This map shows the geographic impact of John H. Callahan'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 John H. Callahan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John H. Callahan more than expected).

Fields of papers citing papers by John H. Callahan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John H. Callahan. 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 John H. Callahan. The network helps show where John H. Callahan may publish in the future.

Co-authorship network of co-authors of John H. Callahan

This figure shows the co-authorship network connecting the top 25 collaborators of John H. Callahan. A scholar is included among the top collaborators of John H. Callahan 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 John H. Callahan. John H. Callahan 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

McFarland, Melinda A., Denis Andrzejewski, Steven M. Musser, & John H. Callahan. (2014). Platform for Identification of Salmonella Serovar Differentiating Bacterial Proteins by Top-Down Mass Spectrometry: S. Typhimurium vs S. Heidelberg. Analytical Chemistry. 86(14). 6879–6886. 19 indexed citations

McFarland, Melinda A., et al.. (2012). Global Proteomic Screening of Protein Allergens and Advanced Glycation Endproducts in Thermally Processed Peanuts. Journal of Agricultural and Food Chemistry. 61(24). 5638–5648. 45 indexed citations

Croley, Timothy R., Kevin D. White, Jon W. Wong, et al.. (2012). Combining targeted and nontargeted data analysis for liquid chromatography/high‐resolution mass spectrometric analyses. Journal of Separation Science. 36(5). 971–979. 8 indexed citations

Lu, Weiying, John H. Callahan, Frederick S. Fry, et al.. (2011). A discriminant based charge deconvolution analysis pipeline for protein profiling of whole cell extracts using liquid chromatography–electrospray ionization-quadrupole time-of-flight mass spectrometry. Talanta. 84(4). 1180–1187. 4 indexed citations

Boehmer, Jamie L., Jeffrey A. DeGrasse, Vicki Lancaster, et al.. (2011). Evaluation of protein expression in bovine bronchoalveolar fluid following challenge with Mannheimia haemolytica. PROTEOMICS. 11(18). 3685–3697. 17 indexed citations

Li, Jinxi, Kevin J. Shefcheck, John H. Callahan, & Catherine Fenselau. (2008). Extension of microwave-accelerated residue-specific acid cleavage to proteins with carbohydrate side chains and disulfide linkages. International Journal of Mass Spectrometry. 278(2-3). 109–113. 17 indexed citations

Davis, Rick D., Jeffrey W. Gilman, Thomas E. Sutto, et al.. (2004). Improved Thermal Stability of Organically Modified Layered Silicates. Clays and Clay Minerals. 52(2). 171–179. 65 indexed citations

Arfsten, Darryl P., Dennis T. Burton, Daniel J. Fisher, et al.. (2003). Assessment of the aquatic and terrestrial toxicity of five biodegradable polymers. Environmental Research. 94(2). 198–210. 13 indexed citations

Johnson, Derek C., V. A. Shamamian, John H. Callahan, et al.. (2003). Treatment of Methyl tert-Butyl Ether Contaminated Water Using a Dense Medium Plasma Reactor: A Mechanistic and Kinetic Investigation. Environmental Science & Technology. 37(20). 4804–4810. 21 indexed citations

10.

Lu, Qin, John H. Callahan, & Greg E. Collins. (2000). The selective detection of uranium(vi) on a microchip using a derivatized 4-sulfonic calix[6]arene. Chemical Communications. 1913–1914. 20 indexed citations

11.

Hartman, JudithAnn R., Richard W. Vachet, & John H. Callahan. (2000). Gas, solution, and solid state coordination environments for the nickel(II) complexes of a series of aminopyridine ligands of varying coordination number. Inorganica Chimica Acta. 297(1-2). 79–87. 38 indexed citations

12.

Collins, Greg E., et al.. (1998). Effect of Solvent Polarity, pH, and Metal Complexation on the Triple Fluorescence of 4-(N-1,4,8,11-tetraazacyclotetradecyl)benzonitrile. Journal of the American Chemical Society. 120(7). 1474–1478. 42 indexed citations

13.

Purdy, Andrew P. & John H. Callahan. (1998). Syntheses of Sublimable Carbon Nitride Materials. Main Group Chemistry. 2(3). 207–213. 9 indexed citations

14.

Vachet, Richard W., Judith Ann R. Hartman, & John H. Callahan. (1998). Ion-molecule reactions in a quadrupole ion trap as a probe of the gas-phase structure of metal complexes. Journal of Mass Spectrometry. 33(12). 1209–1225. 70 indexed citations

15.

Shahgholi, Mona, John H. Callahan, & Christine L. Copper. (1998). Probing Cyclodextrin-Guest Associations Using Electrospray Mass Spectrometry. Supramolecular chemistry. 9(4). 263–276. 5 indexed citations

16.

Ohorodnik, Susan, Ronald E. Shaffer, John H. Callahan, & Susan L. Rose‐Pehrsson. (1997). Mixture Analysis Using Membrane Introduction Mass Spectrometry and Multivariate Calibration. Analytical Chemistry. 69(22). 4721–4727. 17 indexed citations

17.

Shahgholi, Mona, Susan Ohorodnik, & John H. Callahan. (1997). Trace Detection of Underivatized Muramic Acid in Environmental Dust Samples by Microcolumn Liquid Chromatography−Electrospray Tandem Mass Spectrometry. Analytical Chemistry. 69(10). 1956–1960. 19 indexed citations

18.

Tang, Xiaodong, John H. Callahan, Ping Zhou, & Ákos Vértes. (1995). Noncovalent protein-oligonucleotide interactions monitored by matrix-assisted laser desorption/ionization mass spectrometry. Analytical Chemistry. 67(24). 4542–4548. 43 indexed citations

19.

Wyatt, Jeffrey R., et al.. (1995). Sampling of Submarine Atmospheres. SAE technical papers on CD-ROM/SAE technical paper series. 1 indexed citations

20.

Ross, Mark M., David A. Kidwell, & John H. Callahan. (1989). Mass Spectrometric Analysis of Anatoxin-a. Journal of Analytical Toxicology. 13(6). 317–321. 13 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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