D. A. Usher

1.5k total citations
32 papers, 1.1k citations indexed

About

D. A. Usher is a scholar working on Molecular Biology, Astronomy and Astrophysics and Organic Chemistry. According to data from OpenAlex, D. A. Usher has authored 32 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 22 papers in Molecular Biology, 8 papers in Astronomy and Astrophysics and 7 papers in Organic Chemistry. Recurrent topics in D. A. Usher's work include DNA and Nucleic Acid Chemistry (12 papers), RNA and protein synthesis mechanisms (10 papers) and Chemical Synthesis and Analysis (6 papers). D. A. Usher is often cited by papers focused on DNA and Nucleic Acid Chemistry (12 papers), RNA and protein synthesis mechanisms (10 papers) and Chemical Synthesis and Analysis (6 papers). D. A. Usher collaborates with scholars based in United States and Germany. D. A. Usher's co-authors include D. M. Brown, F. Eckstein, Albert T. Profy, David Oakenfull, F. H. Westheimer, J. I. Lunine, David Shalloway, Edward A. Dennis, Martin Rahm and Michael C. Needels and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

D. A. Usher

32 papers receiving 999 citations

Author Peers

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

Author						Papers	Cites
D. A. Usher	812	271	222	134	112	32	1.1k
A. P. Kimball	803 1.0×	536 2.0×	258 1.2×	168 1.3×	107 1.0×	54	1.5k
Saidul Islam	557 0.7×	428 1.6×	364 1.6×	118 0.9×	63 0.6×	24	1.0k
J. Rabinowitz	365 0.4×	305 1.1×	524 2.4×	62 0.5×	95 0.8×	116	1.1k
Peter Strazewski	755 0.9×	168 0.6×	249 1.1×	41 0.3×	33 0.3×	79	948
Tadao Takenishi	716 0.9×	52 0.2×	312 1.4×	98 0.7×	87 0.8×	37	1.1k
S. Weinstein	700 0.9×	68 0.3×	156 0.7×	388 2.9×	523 4.7×	47	1.3k
Robert A. Sanchez	741 0.9×	989 3.6×	173 0.8×	253 1.9×	140 1.3×	24	1.4k
Christina Schneider	362 0.4×	297 1.1×	54 0.2×	88 0.7×	31 0.3×	28	669
Clémentine Gibard	284 0.3×	300 1.1×	210 0.9×	91 0.7×	62 0.6×	17	616
J. van Westrenen	340 0.4×	234 0.9×	48 0.2×	98 0.7×	37 0.3×	21	522

Countries citing papers authored by D. A. Usher

Since Specialization

Citations

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

Fields of papers citing papers by D. A. Usher

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by D. A. Usher. 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 D. A. Usher. The network helps show where D. A. Usher may publish in the future.

Co-authorship network of co-authors of D. A. Usher

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

Stevenson, James, Wael A. Fouad, David Shalloway, et al.. (2015). Solvation of nitrogen compounds in Titan’s seas, precipitates, and atmosphere. Icarus. 256. 1–12. 19 indexed citations

Stowasser, Ralf & D. A. Usher. (2002). Metal ions and the stereochemistry of ribozyme reactions. Bioorganic Chemistry. 30(6). 420–430. 3 indexed citations

Usher, D. A., et al.. (1995). A new 2′-hydroxyl protecting group for the automated synthesis of oligoribonucleotides. Nucleic Acids Research. 23(23). 4872–4877. 13 indexed citations

Usher, D. A. & Michael C. Needels. (1986). The evolution of nucleotides. Advances in Space Research. 6(11). 29–32. 1 indexed citations

Tarter, Jill, Douglas J. DeFrees, D. E. Brownlee, et al.. (1986). Exobiology in earth orbit. Origins of Life and Evolution of Biospheres. 16(3-4). 419–419. 1 indexed citations

Profy, Albert T. & D. A. Usher. (1984). Stereoselective aminoacylation of polyribonucleotides. Journal of the American Chemical Society. 106(17). 5030–5031. 19 indexed citations

Usher, D. A., et al.. (1984). Nucleic acids, proteins, and chirality. Origins of Life and Evolution of Biospheres. 14(1-4). 621–628. 9 indexed citations

Profy, Albert T. & D. A. Usher. (1984). Stereoselective aminoacylation of a dinucleoside monophosphate by the imidazolides ofDl-alanine and N-(tert-butoxycarbonyl)-Dl-alanine. Journal of Molecular Evolution. 20(2). 147–156. 35 indexed citations

Profy, Albert T., Kin-Ming Lo, & D. A. Usher. (1983). Synthesis of 2'(3')-O-DL-alanyl hexainosinic acid using T4 RNA ligase: suppression of the enzymic reverse transfer reaction by alkaline phosphatase. Nucleic Acids Research. 11(5). 1617–1632. 2 indexed citations

10.

Usher, D. A.. (1979). Reverse-phase HPLC of DNA restriction fragments and ribooligonucleotides on uncoated Kel-F powder. Nucleic Acids Research. 6(6). 2289–2306. 34 indexed citations

11.

Usher, D. A.. (1977). Early Chemical Evolution of Nucleic Acids: A Theoretical Model. Science. 196(4287). 311–313. 60 indexed citations

12.

Usher, D. A., et al.. (1976). Nonenzymic Joining of Oligoadenylates on a Polyuridylic Acid Template. Science. 192(4234). 53–54. 67 indexed citations

13.

Usher, D. A., et al.. (1975). Inexpensive septumless injector for high pressure liquid chromatography. Analytical Chemistry. 47(4). 783–784. 3 indexed citations

14.

Usher, D. A.. (1972). RNA Double Helix and the Evolution of the 3′,5′ Linkage. Nature New Biology. 235(59). 207–208. 48 indexed citations

15.

Usher, D. A., et al.. (1970). Absolute Stereochemistry of the Second Step of Ribonuclease Action. Nature. 228(5272). 663–665. 101 indexed citations

16.

Usher, D. A.. (1969). ON THE MECHANISM OF RIBONUCLEASE ACTION. Proceedings of the National Academy of Sciences. 62(3). 661–667. 57 indexed citations

17.

Usher, D. A., et al.. (1967). Mechanism involving pseudo-rotation for the hydrolysis of dimethylphosphoacetoin. Journal of the American Chemical Society. 89(24). 6360–6361. 18 indexed citations

18.

Brown, D. M. & D. A. Usher. (1965). 1206. Hydrolysis of hydroxyalkyl phosphate esters: the epoxide route. Journal of the Chemical Society (Resumed). 6547–6547. 16 indexed citations

19.

Brown, D. M. & D. A. Usher. (1965). 1207. Hydrolysis of hydroxyalkyl phosphate esters: effect of changing ester group. Journal of the Chemical Society (Resumed). 6558–6558. 131 indexed citations

20.

Usher, D. A.. (1963). Estimation of phosphorus on paper chromatograms. Journal of Chromatography A. 12. 262–263. 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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