Roy H. Hammerstedt

4.9k total citations · 1 hit paper
86 papers, 3.9k citations indexed

About

Roy H. Hammerstedt is a scholar working on Reproductive Medicine, Public Health, Environmental and Occupational Health and Molecular Biology. According to data from OpenAlex, Roy H. Hammerstedt has authored 86 papers receiving a total of 3.9k indexed citations (citations by other indexed papers that have themselves been cited), including 52 papers in Reproductive Medicine, 37 papers in Public Health, Environmental and Occupational Health and 30 papers in Molecular Biology. Recurrent topics in Roy H. Hammerstedt's work include Sperm and Testicular Function (52 papers), Reproductive Biology and Fertility (36 papers) and Reproductive biology and impacts on aquatic species (10 papers). Roy H. Hammerstedt is often cited by papers focused on Sperm and Testicular Function (52 papers), Reproductive Biology and Fertility (36 papers) and Reproductive biology and impacts on aquatic species (10 papers). Roy H. Hammerstedt collaborates with scholars based in United States, Japan and Taiwan. Roy H. Hammerstedt's co-authors include R. P. Amann, James K. Graham, John P. Nolan, E Kunze, J.K. Graham, John E. Parks, John P. Nolan, D. N. Rao Veeramachaneni, Alec D. Keith and G. F. Barbato and has published in prestigious journals such as Journal of Biological Chemistry, Biochemistry and Analytical Biochemistry.

In The Last Decade

Roy H. Hammerstedt

86 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.

Cryopreservation of Mammalian Sperm: What We Ask Them to Survive

1990 557 citations Roy H. Hammerstedt, James K. Graham et al. Journal of Andrology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Roy H. Hammerstedt United States	35	2.8k	2.3k	720	667	579	86	3.9k
B.M. Gadella Netherlands	35	3.6k 1.3×	3.0k 1.3×	947 1.3×	614 0.9×	622 1.1×	60	4.7k
I. G. White Australia	37	3.1k 1.1×	2.0k 0.9×	661 0.9×	597 0.9×	538 0.9×	165	5.0k
Stanley Meizel United States	45	4.6k 1.6×	3.6k 1.6×	1.5k 2.1×	858 1.3×	708 1.2×	109	6.2k
G. Rickey Welch United States	36	1.7k 0.6×	1.6k 0.7×	1.5k 2.1×	301 0.5×	815 1.4×	92	4.1k
Joseph S. Tash United States	33	1.7k 0.6×	1.4k 0.6×	1.3k 1.8×	378 0.6×	557 1.0×	66	3.6k
Janice L. Bailey Canada	43	5.3k 1.9×	4.7k 2.1×	1.3k 1.9×	1.1k 1.7×	947 1.6×	122	7.2k
Gary E. Olson United States	40	2.3k 0.8×	1.7k 0.8×	1.3k 1.8×	323 0.5×	640 1.1×	101	4.5k
R. N. Peterson United States	31	2.1k 0.7×	1.4k 0.6×	740 1.0×	330 0.5×	374 0.6×	75	2.7k
G. Bleau Canada	37	1.6k 0.6×	1.2k 0.5×	985 1.4×	147 0.2×	629 1.1×	95	3.3k
Marie‐Claire Orgebin‐Crist United States	40	2.7k 1.0×	1.6k 0.7×	1.7k 2.3×	202 0.3×	885 1.5×	115	4.5k

Countries citing papers authored by Roy H. Hammerstedt

Since Specialization

Citations

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

Fields of papers citing papers by Roy H. Hammerstedt

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Roy H. Hammerstedt

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

Hammerstedt, Roy H., et al.. (2007). Commercialization of basic research from within the university and return of value to the public. Animal Reproduction Science. 105(1-2). 158–178. 12 indexed citations

Harayama, Hiroshi, Masashi Miyake, E Kunze, et al.. (2000). Changes in epididymal protein anti-agglutinin on ejaculated boar spermatozoa during capacitation in vitro. Reproduction Fertility and Development. 11(5). 193–199. 23 indexed citations

Hammerstedt, Roy H., et al.. (2000). Increased in vitro binding and fertilizing ability of mouse sperm exposed to a synthetic peptide. Molecular Reproduction and Development. 57(4). 406–411. 11 indexed citations

Amann, R. P., et al.. (1999). Exposure of Human, Boar, or Bull Sperm to a Synthetic Peptide Increases Binding to an Egg‐Membrane Substrate. Journal of Andrology. 20(1). 34–41. 34 indexed citations

Barbato, G. F., et al.. (1998). A Practical In Vitro Sperm-Egg Binding Assay That Detects Subfertile Males1. Biology of Reproduction. 58(3). 686–699. 63 indexed citations

Crichton, Elizabeth G., Fumie Suzuki, Philip H. Krutzsch, & Roy H. Hammerstedt. (1993). Unique features of the cauda epididymidal epithelium of hibernating bats may promote sperm longevity. The Anatomical Record. 237(4). 475–481. 11 indexed citations

Hammerstedt, Roy H.. (1993). Maintenance of bioenergetic balance in sperm and prevention of lipid peroxidation: a review of the effect on design of storage preservation systems. Reproduction Fertility and Development. 5(6). 675–690. 91 indexed citations

Watson, P.F., M.R. Curry, E.E. Noiles, et al.. (1992). Response of spermatozoa to hyposmotic stress reflects cryopreservation success. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). 2 indexed citations

Nolan, John P., James K. Graham, & Roy H. Hammerstedt. (1992). Artificial induction of exocytosis in bull sperm. Archives of Biochemistry and Biophysics. 292(1). 311–322. 43 indexed citations

10.

Graham, James K., John P. Nolan, & Roy H. Hammerstedt. (1991). Effect of Dilauroylphosphatidylcholine Liposomes on Motility, Induction of the Acrosome Reaction, and Subsequent Egg Penetration of Ram Epididymal Sperm1. Biology of Reproduction. 44(6). 1092–1099. 15 indexed citations

11.

Hammerstedt, Roy H., James K. Graham, & John P. Nolan. (1990). Cryopreservation of Mammalian Sperm: What We Ask Them to Survive. Journal of Andrology. 11(1). 73–88. 557 indexed citations breakdown →

12.

Kunze, E, et al.. (1990). Lectins and heparin-binding features of human spermatozoa as analyzed by flow cytometry. American Journal of Obstetrics and Gynecology. 163(6). 2006–2012. 5 indexed citations

13.

Hammerstedt, Roy H., et al.. (1982). Modification of Ram Sperm Membranes During Epididymal Transit1. Biology of Reproduction. 27(3). 745–754. 43 indexed citations

14.

Inskeep, Philip B. & Roy H. Hammerstedt. (1982). Changes in Metabolism of Ram Sperm Associated With Epididymal Transit or Induced by Exogenous Carnitine1. Biology of Reproduction. 27(3). 735–743. 21 indexed citations

15.

Hiipakka, Richard A. & Roy H. Hammerstedt. (1978). 2-Deoxyglucose Transport and Phosphorylation by Bovine Sperm1. Biology of Reproduction. 19(2). 368–379. 36 indexed citations

16.

Hammerstedt, Roy H., et al.. (1977). A method for measurement of the specific radioactivity of the choline moiety of choline phospholipids. Analytical Biochemistry. 81(1). 175–185. 1 indexed citations

17.

Patton, Stuart, et al.. (1976). Adenosine Triphosphate in Milk. Journal of Dairy Science. 59(8). 1388–1391. 5 indexed citations

18.

Niehaus, Walter G. & Roy H. Hammerstedt. (1976). Mode of orthophosphate uptake and ATP labeling by mammalian cells. Biochimica et Biophysica Acta (BBA) - Biomembranes. 443(3). 515–524. 21 indexed citations

19.

Lepock, James R., Philip D. Morse, Rolf J. Mehlhorn, et al.. (1975). Spin labels for cell surfaces. FEBS Letters. 60(1). 185–189. 23 indexed citations

20.

Polan, C.E., et al.. (1967). Metabolism of Hydroxylysine by Rats. Journal of Nutrition. 91(2). 143–150. 16 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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