Helmut Wiedenfeld

2.5k total citations
105 papers, 1.9k citations indexed

About

Helmut Wiedenfeld is a scholar working on Molecular Biology, Ecology, Evolution, Behavior and Systematics and Organic Chemistry. According to data from OpenAlex, Helmut Wiedenfeld has authored 105 papers receiving a total of 1.9k indexed citations (citations by other indexed papers that have themselves been cited), including 75 papers in Molecular Biology, 31 papers in Ecology, Evolution, Behavior and Systematics and 18 papers in Organic Chemistry. Recurrent topics in Helmut Wiedenfeld's work include Plant Toxicity and Pharmacological Properties (63 papers), Botanical Research and Chemistry (29 papers) and Sesquiterpenes and Asteraceae Studies (13 papers). Helmut Wiedenfeld is often cited by papers focused on Plant Toxicity and Pharmacological Properties (63 papers), Botanical Research and Chemistry (29 papers) and Sesquiterpenes and Asteraceae Studies (13 papers). Helmut Wiedenfeld collaborates with scholars based in Germany, Mexico and Poland. Helmut Wiedenfeld's co-authors include Adolfo Andrade‐Cetto, J. A. Edgar, Erhard Röder, E. Roeder, M. Revilla, Erhard Roeder, E. Röder, Agnieszka Pietrosiuk, Samdan Narantuya and Mirosława Furmanowa and has published in prestigious journals such as Journal of Ethnopharmacology, Phytochemistry and Plant Cell Reports.

In The Last Decade

Helmut Wiedenfeld

102 papers receiving 1.8k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Helmut Wiedenfeld Germany 24 1.2k 549 546 505 357 105 1.9k
Choudhury Mahmood Hasan Bangladesh 28 960 0.8× 1.0k 1.8× 144 0.3× 329 0.7× 231 0.6× 186 2.4k
Munehisa Arisawa Japan 28 1.3k 1.0× 941 1.7× 118 0.2× 360 0.7× 147 0.4× 124 2.4k
Maurice Vanhaelen Belgium 22 775 0.6× 664 1.2× 92 0.2× 761 1.5× 93 0.3× 119 2.4k
J.S. Tandon India 23 576 0.5× 913 1.7× 88 0.2× 353 0.7× 148 0.4× 63 1.9k
J.M. Pezzuto United States 25 1.4k 1.1× 700 1.3× 89 0.2× 470 0.9× 124 0.3× 38 2.6k
Kristina Jenett‐Siems Germany 23 660 0.5× 643 1.2× 131 0.2× 265 0.5× 107 0.3× 74 1.5k
C.K. Atal India 25 1.1k 0.9× 738 1.3× 133 0.2× 722 1.4× 150 0.4× 113 2.4k
Hsin‐Sheng Tsay Taiwan 27 1.5k 1.3× 1.4k 2.5× 257 0.5× 266 0.5× 131 0.4× 76 2.6k
Andrea Vasas Hungary 27 1.5k 1.2× 981 1.8× 174 0.3× 456 0.9× 69 0.2× 94 2.6k
Thawatchai Santisuk Thailand 27 938 0.8× 655 1.2× 90 0.2× 357 0.7× 76 0.2× 57 1.8k

Countries citing papers authored by Helmut Wiedenfeld

Since Specialization
Citations

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

Fields of papers citing papers by Helmut Wiedenfeld

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helmut Wiedenfeld

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

All Works

20 of 20 papers shown
1.
Wiedenfeld, Helmut, et al.. (2020). Natural Toxins of Ageratum conyzoides from Hepatic Vein Occlusive Disease Affected Community in Ethiopia. Natural Products Chemistry & Research. 8(1). 1–4. 1 indexed citations
2.
Wiedenfeld, Helmut. (2011). Plants containing pyrrolizidine alkaloids: toxicity and problems. Food Additives & Contaminants Part A. 28(3). 282–292. 153 indexed citations
3.
Wiedenfeld, Helmut, H. Schnyder, J. Isselstein, et al.. (2010). Pyrrolizidine alkaloid level in Senecio jacobaea and Senecio erraticus - the effect of plant organ and forage conservation.. 669–671. 9 indexed citations
4.
Andrade‐Cetto, Adolfo & Helmut Wiedenfeld. (2010). Anti-hyperglycemic effect of Opuntia streptacantha Lem. Journal of Ethnopharmacology. 133(2). 940–943. 49 indexed citations
5.
Andrade‐Cetto, Adolfo, M. Revilla, & Helmut Wiedenfeld. (2007). Hypoglycemic effect of Tournefortia hirsutissima L., on n-streptozotocin diabetic rats. Journal of Ethnopharmacology. 112(1). 96–100. 18 indexed citations
6.
Pietrosiuk, Agnieszka, et al.. (2004). The effect of pyrrolizidine alkaloids on the Colorado potato beetle [Leptinotarsa decemlineata Say]. Acta Biologica Cracoviensia. Series Zoologia. 46. 1 indexed citations
7.
Pietrosiuk, Agnieszka, Bogdan Kędzia, Elżbieta Hołderna‐Kędzia, et al.. (2003). Antimicrobial activity of naphthoquinones from Lithospermum canescens [Michx.] Lehm. Herba Polonica. 49. 6 indexed citations
8.
Andrade‐Cetto, Adolfo & Helmut Wiedenfeld. (2003). Hypoglycemic effect of Acosmium panamense bark on streptozotocin diabetic rats. Journal of Ethnopharmacology. 90(2-3). 217–220. 42 indexed citations
9.
Andrade‐Cetto, Adolfo, et al.. (2000). Hypoglycemic effect of Equisetum myriochaetum aerial parts on streptozotocin diabetic rats. Journal of Ethnopharmacology. 72(1-2). 129–133. 120 indexed citations
10.
Roeder, E., et al.. (1997). Toxic diterpene glycosides from Iphiona aucheri. Fitoterapia. 68(3). 278–280. 2 indexed citations
11.
Wiedenfeld, Helmut, et al.. (1996). O7-Angeloylretronecine, a Pyrrolizidine Alkaloid fromSenecio inornatus. Planta Medica. 62(5). 483–483. 2 indexed citations
12.
Roeder, Erhard, et al.. (1996). Pyrrolizidine Alkaloids fromGynura divaricata*. Planta Medica. 62(4). 386–386. 32 indexed citations
13.
Roeder, Erhard, et al.. (1995). Pyrrolizidine Alkaloids fromSyneilesis aconitifolia*. Planta Medica. 61(1). 97–98. 1 indexed citations
14.
Roeder, E., et al.. (1994). Diterpene glycosides from Iphiona aucheri. Phytochemistry. 37(2). 353–355. 13 indexed citations
15.
Wiedenfeld, Helmut & Erhard Röder. (1991). Pyrrolizidine Alkaloids fromAgeratum conyzoides. Planta Medica. 57(6). 578–579. 60 indexed citations
16.
Wiedenfeld, Helmut, et al.. (1986). The Aklaloid Content of Senecio nemorensis, ssp. nemorensis and Senecio nemorensis, ssp. fuchsii. Planta Medica. 52(5). 426–426. 1 indexed citations
17.
Wiedenfeld, Helmut. (1982). Zwei neue lebertoxische Pyrrolizidinalkaloide aus Gynura scandens. Planta Medica. 45(7). 136–137. 1 indexed citations
18.
Röder, E., et al.. (1982). Pyrrolizidinalkaloide aus Senecio congestus. Planta Medica. 44(3). 182–183. 2 indexed citations
19.
Wiedenfeld, Helmut, et al.. (1981). Zur gaschromatographischen Bestimmung der Pyrrolizidinalkaloide aus einigen Senecioarten. Planta Medica. 41(2). 124–128. 11 indexed citations
20.
Röder, E., et al.. (1981). Die Pyrrolizidinalkaloide Senecionin und Retrorsin ausSenecio inaequidens. Planta Medica. 41(4). 412–413. 4 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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