Ann Hagerman

15.8k total citations · 5 hit papers
130 papers, 12.3k citations indexed

About

Ann Hagerman is a scholar working on Molecular Biology, Biochemistry and Plant Science. According to data from OpenAlex, Ann Hagerman has authored 130 papers receiving a total of 12.3k indexed citations (citations by other indexed papers that have themselves been cited), including 39 papers in Molecular Biology, 31 papers in Biochemistry and 27 papers in Plant Science. Recurrent topics in Ann Hagerman's work include Phytochemicals and Antioxidant Activities (30 papers), Fermentation and Sensory Analysis (20 papers) and Ruminant Nutrition and Digestive Physiology (15 papers). Ann Hagerman is often cited by papers focused on Phytochemicals and Antioxidant Activities (30 papers), Fermentation and Sensory Analysis (20 papers) and Ruminant Nutrition and Digestive Physiology (15 papers). Ann Hagerman collaborates with scholars based in United States, China and Finland. Ann Hagerman's co-authors include Larry G. Butler, L. G. Butler, Kenneth M. Riedl, Charles T. Robbins, Thomas A. Hanley, Charles T. Robbins, G. Alexander Jones, Thomas L. Riechel, Clare McArthur and Simon Mole and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Biological Chemistry and Nature Communications.

In The Last Decade

Ann Hagerman

130 papers receiving 11.3k citations

Hit Papers

align trajectories sort by overperformance

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.

High Molecular Weight Plant Polyphenolics (Tannins) as Biological Antioxidants

1998 1.1k citations Ann Hagerman et al. profile →
Protein precipitation method for the quantitative determination of tannins

1978 809 citations Ann Hagerman, Larry G. Butler profile →
The specificity of proanthocyanidin-protein interactions.

1981 808 citations Ann Hagerman et al. profile →
Role of Tannins in Defending Plants Against Ruminants: Reduction in Protein Availability

1987 564 citations Ann Hagerman et al. profile →
Role of Tannins in Defending Plants Against Ruminants: Reduction in Dry Matter Digestion?

1987 381 citations Simon Mole, Ann Hagerman et al. profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Ann Hagerman	3.6k	2.6k	2.4k	2.3k	1.8k	130	12.3k
Larry G. Butler	3.2k 0.9×	1.5k 0.6×	1.9k 0.8×	1.9k 0.8×	445 0.2×	86	7.9k
H.P.S. Makkar	7.1k 2.0×	952 0.4×	3.3k 1.4×	4.7k 2.1×	2.2k 1.2×	254	24.9k
Peter F. Surai	2.2k 0.6×	2.1k 0.8×	677 0.3×	1.2k 0.5×	2.3k 1.3×	202	12.6k
Warren C. McNabb	1.7k 0.5×	431 0.2×	1.6k 0.6×	3.3k 1.5×	797 0.4×	247	10.6k
Robert J Henry	14.0k 3.9×	502 0.2×	3.3k 1.4×	6.0k 2.6×	857 0.5×	600	21.6k
GEORGE W. LATIMER	2.2k 0.6×	840 0.3×	3.0k 1.2×	1.2k 0.5×	410 0.2×	18	9.2k
Giuseppe Mazza	6.3k 1.7×	6.9k 2.7×	6.7k 2.8×	3.9k 1.7×	1.0k 0.6×	332	20.2k
Riitta Julkunen‐Tiitto	5.0k 1.4×	1.1k 0.4×	958 0.4×	1.7k 0.8×	1.4k 0.8×	227	8.5k
Ronald D. Hatfield	4.9k 1.4×	664 0.3×	1.9k 0.8×	4.0k 1.8×	262 0.1×	120	11.0k
G. C. Fahey	2.7k 0.7×	1.0k 0.4×	3.9k 1.6×	5.9k 2.6×	759 0.4×	363	23.0k

Countries citing papers authored by Ann Hagerman

Since Specialization

Citations

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

Fields of papers citing papers by Ann Hagerman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ann Hagerman. 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 Ann Hagerman. The network helps show where Ann Hagerman may publish in the future.

Co-authorship network of co-authors of Ann Hagerman

This figure shows the co-authorship network connecting the top 25 collaborators of Ann Hagerman. A scholar is included among the top collaborators of Ann Hagerman 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 Ann Hagerman. Ann Hagerman 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

Halvorson, Jonathan J., et al.. (2025). Rapid formation of abiotic CO₂ after adding phenolic gallic acid, to agricultural soils. Agrosystems Geosciences & Environment. 8(1). 1 indexed citations

McGivern, Bridget B., Jared Ellenbogen, David Hoyt, et al.. (2025). Polyphenol rewiring of the microbiome reduces methane emissions. The ISME Journal. 19(1). 3 indexed citations

Zhang, Liangliang, et al.. (2025). Green Tea Polyphenol Epigallocatechin Gallate Interactions with Copper-Serum Albumin. Molecules. 30(2). 320–320. 1 indexed citations

Liimatainen, Jaana, Magnus Rudolfsson, Maarit Karonen, et al.. (2024). Pilot scale hydrodynamic cavitation and hot-water extraction of Norway spruce bark yield antimicrobial and polyphenol-rich fractions. Separation and Purification Technology. 360. 130925–130925. 8 indexed citations

Halvorson, Jonathan J., et al.. (2024). Oxidation of Small Phenolic Compounds by Mn(IV). Molecules. 29(18). 4320–4320. 3 indexed citations

McGivern, Bridget B., Malak Tfaily, Mikayla Borton, et al.. (2021). Decrypting bacterial polyphenol metabolism in an anoxic wetland soil. Nature Communications. 12(1). 2466–2466. 66 indexed citations

Hagerman, Ann, Virpi Virjamo, Mika Lännenpää, et al.. (2020). Genetic modification of the flavonoid pathway alters growth and reveals flexible responses to enhanced UVB – Role of foliar condensed tannins. SHILAP Revista de lepidopterología. 2(1). 1–15. 3 indexed citations

Li, Min, et al.. (2016). Isolation of (−)-Epigallocatechin from Green Tea Extract by Means of Immobilized Tannase. Planta Medica International Open. 3(2). e35–e38. 4 indexed citations

Alessio, Helaine M., et al.. (2014). Comparison of Gene and Protein Expressions in Rats Residing in Standard Cages with Those Having Access to an Exercise Wheel. BioMed Research International. 2014. 1–9. 6 indexed citations

10.

Halvorson, Jonathan J., Javier M. Gonzalez, & Ann Hagerman. (2013). Retention of Tannin‐C is Associated with Decreased Soluble Nitrogen and Increased Cation Exchange Capacity in a Broad Range of Soils. Soil Science Society of America Journal. 77(4). 1199–1213. 11 indexed citations

11.

Li, Chunmei, et al.. (2013). The interaction of a polymeric persimmon proanthocyanidin fraction with Chinese cobra PLA2 and BSA. Toxicon. 67. 71–79. 11 indexed citations

12.

Li, Min & Ann Hagerman. (2013). Interactions Between Plasma Proteins and Naturally Occurring Polyphenols. Current Drug Metabolism. 14(4). 432–445. 45 indexed citations

13.

Hagerman, Ann, Klara M. Posfay‐Barbe, Stéphane Grillet, et al.. (2011). Failure to elicit seroresponses to pneumococcal surface proteins (pneumococcal histidine triad D, pneumococcal choline-binding protein A, and serine proteinase precursor A) in children with pneumococcal bacteraemia. Clinical Microbiology and Infection. 18(8). 756–762. 12 indexed citations

14.

Close, Dugald C., Clare McArthur, Ann Hagerman, Noel W. Davies, & C. L. Beadle. (2007). Phenolic acclimation to ultraviolet-A irradiation in Eucalyptus nitens seedlings raised across a nutrient environment gradient. Photosynthetica. 45(1). 36–42. 18 indexed citations

15.

Chen, Yumin & Ann Hagerman. (2005). Reaction pH and protein affect the oxidation products of β-pentagalloyl glucose. Free Radical Research. 39(2). 117–124. 21 indexed citations

16.

Stern, J, et al.. (1996). Phlorotannin-protein interactions. Journal of Chemical Ecology. 22(10). 1877–1899. 220 indexed citations

17.

Hagerman, Ann & Larry G. Butler. (1994). [42] Assay of condensed tannins or flavonoid oligomers and related flavonoids in plants. Methods in enzymology on CD-ROM/Methods in enzymology. 234. 429–437. 66 indexed citations

18.

Hagerman, Ann. (1992). Tannin—Protein Interactions. ACS symposium series. 213. 236–247. 178 indexed citations

19.

Mole, Simon, Larry G. Butler, Ann Hagerman, & Peter G. Waterman. (1989). Ecological tannin assays: a critique. Oecologia. 78(1). 93–96. 19 indexed citations

20.

Price, Martin L., et al.. (1980). Tannin in sorghum grain: effect of cooking on chemical assays and on antinutritional properties in rats.. Nutrition reports international. 21(5). 761–767. 44 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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