James K. Harper

5.1k total citations · 1 hit paper
81 papers, 3.8k citations indexed

About

James K. Harper is a scholar working on Spectroscopy, Materials Chemistry and Pharmacology. According to data from OpenAlex, James K. Harper has authored 81 papers receiving a total of 3.8k indexed citations (citations by other indexed papers that have themselves been cited), including 45 papers in Spectroscopy, 34 papers in Materials Chemistry and 16 papers in Pharmacology. Recurrent topics in James K. Harper's work include Advanced NMR Techniques and Applications (37 papers), Solid-state spectroscopy and crystallography (20 papers) and NMR spectroscopy and applications (15 papers). James K. Harper is often cited by papers focused on Advanced NMR Techniques and Applications (37 papers), Solid-state spectroscopy and crystallography (20 papers) and NMR spectroscopy and applications (15 papers). James K. Harper collaborates with scholars based in United States, Sweden and India. James K. Harper's co-authors include Gary A. Strobel, Uvidelio Castillo, David M. Grant, Fernando J. Uribe‐Romo, Atta M. Arif, Eugene Ford, W. M. Hess, Demetrius A. Vazquez-Molina, Matthew W. Logan and Robbie J. Iuliucci and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Chemical Physics and Analytical Chemistry.

In The Last Decade

James K. Harper

76 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.

Natural Products from Endophytic Microorganisms

2004 1.1k citations Gary A. Strobel, Uvidelio Castillo et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
James K. Harper United States	29	1.4k	944	714	687	683	81	3.8k
Torsten Bruhn Germany	30	1.1k 0.8×	778 0.8×	865 1.2×	616 0.9×	128 0.2×	79	4.3k
Hiroyuki Koshino Japan	46	2.1k 1.5×	365 0.4×	423 0.6×	1.5k 2.1×	602 0.9×	351	8.5k
Jun Uzawa Japan	30	837 0.6×	243 0.3×	453 0.6×	502 0.7×	144 0.2×	161	3.5k
Lewis N. Mander Australia	37	487 0.3×	464 0.5×	945 1.3×	2.0k 3.0×	188 0.3×	198	7.0k
Stefano Superchi Italy	29	312 0.2×	279 0.3×	1.0k 1.4×	450 0.7×	143 0.2×	107	2.7k
Keiichi Fukuyama Japan	39	299 0.2×	766 0.8×	182 0.3×	741 1.1×	756 1.1×	200	4.9k
Angela Tuzi Italy	34	233 0.2×	918 1.0×	392 0.5×	340 0.5×	212 0.3×	166	3.2k
Hans Brückner Germany	44	922 0.6×	249 0.3×	1.4k 1.9×	690 1.0×	269 0.4×	198	5.4k
Richard A. Manderville Canada	36	338 0.2×	389 0.4×	264 0.4×	1.8k 2.7×	148 0.2×	139	4.8k
A. Ian Scott United States	39	495 0.3×	727 0.8×	322 0.5×	353 0.5×	205 0.3×	237	4.7k

Countries citing papers authored by James K. Harper

Since Specialization

Citations

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

Fields of papers citing papers by James K. Harper

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James K. Harper. 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 James K. Harper. The network helps show where James K. Harper may publish in the future.

Co-authorship network of co-authors of James K. Harper

This figure shows the co-authorship network connecting the top 25 collaborators of James K. Harper. A scholar is included among the top collaborators of James K. Harper 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 James K. Harper. James K. Harper 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

Wang, Yangyang, et al.. (2025). A multivariate library of zirconia metal–organic frameworks with dissolved p -nitroaniline dipoles and concentration-dependent optical and dielectric response. CrystEngComm. 27(26). 4463–4469.

Burt, Scott R., et al.. (2025). Improving the Prediction of Antioxidant Activity by Identifying High-Probability Conformations with NMR. Analytical Chemistry. 97(25). 12931–12935.

Nickles, Robert J., et al.. (2025). A solid-state NMR approach for distinguishing between RNH2 and RNH3+ sites. Solid State Nuclear Magnetic Resonance. 138. 102018–102018.

Harper, James K., et al.. (2024). Predicting 35-Cl electric field gradient tensors in crystalline solids using cluster and fragment-corrected planewave density functional theory. Solid State Nuclear Magnetic Resonance. 133. 101949–101949. 2 indexed citations

Toomey, Ryan, Joshua D. Hartman, Alexander J. Nichols, et al.. (2024). NMR-guided refinement of crystal structures using ¹⁵N chemical shift tensors. CrystEngComm. 26(25). 3289–3302. 3 indexed citations

Harper, James K., et al.. (2024). Hydrogen Fueling and GT Demand Changes Impact Insights Through Modeling.

Logan, Matthew W., Zhihengyu Chen, Demetrius A. Vazquez-Molina, et al.. (2023). Synergistic Steric and Electronic Effects on the Photoredox Catalysis by a Multivariate Library of Titania Metal–Organic Frameworks. Journal of the American Chemical Society. 145(8). 4589–4600. 40 indexed citations

Harper, James K., et al.. (2021). Refining crystal structures using ¹³C NMR chemical shift tensors as a target function. CrystEngComm. 23(40). 7061–7071. 4 indexed citations

Cherubin, Patrick, et al.. (2021). Proline Isomerization as a Key Determinant for Hsp90-Toxin Interactions. Frontiers in Cellular and Infection Microbiology. 11. 771653–771653. 6 indexed citations

10.

Hartman, Joshua D., et al.. (2021). Fast and Accurate Electric Field Gradient Calculations in Molecular Solids With Density Functional Theory. Frontiers in Chemistry. 9. 751711–751711. 10 indexed citations

11.

Holmes, Sean T., Jeffry D. Madura, Rosalynn Quiñones, et al.. (2020). Chemical Shift Tensors of Cimetidine Form A Modeled with Density Functional Theory Calculations: Implications for NMR Crystallography. The Journal of Physical Chemistry A. 124(16). 3109–3119. 33 indexed citations

12.

Nash, David J., David T. Restrepo, Maral Aminpour, et al.. (2016). Heterogeneous Metal-Free Hydrogenation over Defect-Laden Hexagonal Boron Nitride. ACS Omega. 1(6). 1343–1354. 51 indexed citations

13.

Kharwar, Ravindra N., Vijay Verma, Anuj Kumar, et al.. (2008). Javanicin, an Antibacterial Naphthaquinone from an Endophytic Fungus of Neem, Chloridium sp.. Current Microbiology. 58(3). 233–238. 89 indexed citations

14.

Hoffman, Angela, Steven G. Mayer, Gary A. Strobel, et al.. (2007). Purification, identification and activity of phomodione, a furandione from an endophytic Phoma species. Phytochemistry. 69(4). 1049–1056. 56 indexed citations

15.

Harper, James K., Mark Strohmeier, & David M. Grant. (2007). Pursuing structure in microcrystalline solids with independent molecules in the unit cell using 1H–13C correlation data. Journal of Magnetic Resonance. 189(1). 20–31. 16 indexed citations

16.

Castillo, Uvidelio, James K. Harper, Gary A. Strobel, et al.. (2003). Kakadumycins, novel antibiotics fromStreptomycessp. NRRL 30566, an endophyte ofGrevillea pteridifolia. FEMS Microbiology Letters. 224(2). 183–190. 148 indexed citations

17.

Strobel, Gary A., Eugene Ford, James K. Harper, et al.. (2002). Isopestacin, an isobenzofuranone from Pestalotiopsis microspora, possessing antifungal and antioxidant activities. Phytochemistry. 60(2). 179–183. 246 indexed citations

18.

Harper, James K., et al.. (2001). 10-Deacetyl baccatin III dimethyl sulfoxide disolvate. Acta Crystallographica Section C Crystal Structure Communications. 57(1). 64–65. 8 indexed citations

19.

Harper, James K., et al.. (2001). Ambuic acid, a highly functionalized cyclohexenone with antifungal activity from Pestalotiopsis spp. and Monochaetia sp.. Phytochemistry. 56(5). 463–468. 145 indexed citations

20.

Hu, Jian Zhi, et al.. (2000). Modified Spectral Editing Methods for 13C CP/MAS Experiments in Solids. Journal of Magnetic Resonance. 142(2). 326–330. 21 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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