Erhard Roeder

535 total citations
19 papers, 424 citations indexed

About

Erhard Roeder is a scholar working on Molecular Biology, Ecology, Evolution, Behavior and Systematics and Cancer Research. According to data from OpenAlex, Erhard Roeder has authored 19 papers receiving a total of 424 indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Molecular Biology, 9 papers in Ecology, Evolution, Behavior and Systematics and 5 papers in Cancer Research. Recurrent topics in Erhard Roeder's work include Plant Toxicity and Pharmacological Properties (17 papers), Botanical Research and Chemistry (8 papers) and Sesquiterpenes and Asteraceae Studies (5 papers). Erhard Roeder is often cited by papers focused on Plant Toxicity and Pharmacological Properties (17 papers), Botanical Research and Chemistry (8 papers) and Sesquiterpenes and Asteraceae Studies (5 papers). Erhard Roeder collaborates with scholars based in Germany, United States and China. Erhard Roeder's co-authors include Helmut Wiedenfeld, Russell J. Molyneux, J. A. Edgar, Mirosława Furmanowa, Eberhard Breitmaier, H. Birecka, Agnieszka Pietrosiuk, Ke Liu and Samdan Narantuya and has published in prestigious journals such as Journal of Agricultural and Food Chemistry, Phytochemistry and Analytical and Bioanalytical Chemistry.

In The Last Decade

Erhard Roeder

18 papers receiving 391 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Erhard Roeder Germany 11 368 222 116 94 41 19 424
Abdel-Monem Ateya Egypt 13 227 0.6× 110 0.5× 83 0.7× 196 2.1× 11 0.3× 28 421
M. P. Hegarty Australia 9 136 0.4× 71 0.3× 31 0.3× 71 0.8× 4 0.1× 20 267
Dos Santos Brazil 14 186 0.5× 78 0.4× 58 0.5× 160 1.7× 12 0.3× 34 436
Rawia Zayed Egypt 13 146 0.4× 37 0.2× 60 0.5× 168 1.8× 23 0.6× 20 407
Jochen M. Scher Germany 10 141 0.4× 159 0.7× 40 0.3× 211 2.2× 10 0.2× 10 443
Joseph Lech United States 8 108 0.3× 83 0.4× 63 0.5× 214 2.3× 27 0.7× 11 340
Günay Sarıyar Türkiye 11 112 0.3× 62 0.3× 102 0.9× 201 2.1× 10 0.2× 29 429
Serdar Şenol Türkiye 12 148 0.4× 127 0.6× 27 0.2× 285 3.0× 47 1.1× 31 449
Dirceu Martins Brazil 12 188 0.5× 43 0.2× 51 0.4× 193 2.1× 21 0.5× 22 395
N. K. Hart Australia 8 103 0.3× 22 0.1× 45 0.4× 91 1.0× 26 0.6× 13 322

Countries citing papers authored by Erhard Roeder

Since Specialization
Citations

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

Fields of papers citing papers by Erhard Roeder

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Erhard Roeder

This figure shows the co-authorship network connecting the top 25 collaborators of Erhard Roeder. A scholar is included among the top collaborators of Erhard Roeder 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 Erhard Roeder. Erhard Roeder is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

19 of 19 papers shown
1.
Wiedenfeld, Helmut, et al.. (2003). Pyrrolizidine Alkaloids from Lithospermum canescens Lehm.. Zeitschrift für Naturforschung C. 58(3-4). 173–176. 18 indexed citations
2.
Wiedenfeld, Helmut, et al.. (2002). Pyrrolizidine Alkaloide in Petasites fragrans. Scientia Pharmaceutica. 70(4). 407–411. 3 indexed citations
3.
Edgar, J. A., Erhard Roeder, & Russell J. Molyneux. (2002). Honey from Plants Containing Pyrrolizidine Alkaloids:  A Potential Threat to Health. Journal of Agricultural and Food Chemistry. 50(10). 2719–2730. 151 indexed citations
4.
Wiedenfeld, Helmut, et al.. (2000). Pyrrolizidine Alkaloids in Senecio nemorensis L. from Mongolia. Scientia Pharmaceutica. 68(2). 207–211. 9 indexed citations
5.
Roeder, Erhard, et al.. (1998). Dehydroxysenkirkinium Chloride, a Quarternary Pyrrolium Salt from the Pyrrolizidine Alkaloid Senkirkine. Archiv der Pharmazie. 331(4). 149–150.
6.
Roeder, Erhard, et al.. (1998). Pyrrolizidine alkaloids from Senecio nevadensis.. PubMed. 7(1). 87–93. 6 indexed citations
7.
Wiedenfeld, Helmut, et al.. (1997). Camptothecin and 10-hydroxycamptothecin in callus and plantlets of t Camptotheca acuminata. Plant Cell Tissue and Organ Culture (PCTOC). 49(3). 213–218. 59 indexed citations
8.
Wiedenfeld, Helmut, et al.. (1997). Quantitative Photometric Determination of Senkirkine in Farfarae Folium. Phytochemical Analysis. 8(1). 1–4. 18 indexed citations
9.
Roeder, Erhard, et al.. (1996). Pyrrolizidine Alkaloids fromGynura divaricata*. Planta Medica. 62(4). 386–386. 32 indexed citations
10.
11.
Roeder, Erhard, et al.. (1995). Pyrrolizidine Alkaloids fromSyneilesis aconitifolia*. Planta Medica. 61(1). 97–98. 1 indexed citations
12.
Roeder, Erhard, et al.. (1993). Pyrrolizidine alkaloids from Senecio leucanthemifolius and Senecio rodriguezii. Natural Toxins. 1(4). 241–245. 8 indexed citations
13.
Roeder, Erhard, et al.. (1992). Pyrrolizidine alkaloids from Werneria nubigena. Natural Toxins. 1(2). 81–83. 7 indexed citations
14.
Roeder, Erhard, et al.. (1992). Pyrrolizidine alkaloids from Melampyrum pratense. Natural Toxins. 1(1). 35–37. 5 indexed citations
15.
Roeder, Erhard, et al.. (1992). Quantitative photometrische Bestimmung der Pyrrolizidinalkaloide in Symphity Radix. Analytical and Bioanalytical Chemistry. 343(8). 621–624. 10 indexed citations
16.
Roeder, Erhard, et al.. (1991). Pyrrolizidine alkaloids of Heliotropium spathulatum. Phytochemistry. 30(5). 1703–1706. 32 indexed citations
17.
Wiedenfeld, Helmut, et al.. (1985). Pyrrolizidine alkaloids from seeds of Crotalaria scassellatii. Phytochemistry. 24(2). 376–378. 11 indexed citations
18.
Roeder, Erhard, et al.. (1984). Pyrrolizidine alkaloids from Alkanna tinctoria. Phytochemistry. 23(9). 2125–2126. 23 indexed citations
19.
Roeder, Erhard, et al.. (1984). Pyrrolizidine alkaloids from Senecio cacaliaster. Phytochemistry. 23(8). 1761–1763. 14 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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