Helmut Ripperger

1.5k total citations
87 papers, 1.1k citations indexed

About

Helmut Ripperger is a scholar working on Molecular Biology, Food Science and Organic Chemistry. According to data from OpenAlex, Helmut Ripperger has authored 87 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 61 papers in Molecular Biology, 20 papers in Food Science and 16 papers in Organic Chemistry. Recurrent topics in Helmut Ripperger's work include Phytochemical Studies and Bioactivities (35 papers), Potato Plant Research (20 papers) and Phytochemistry and Bioactive Compounds (15 papers). Helmut Ripperger is often cited by papers focused on Phytochemical Studies and Bioactivities (35 papers), Potato Plant Research (20 papers) and Phytochemistry and Bioactive Compounds (15 papers). Helmut Ripperger collaborates with scholars based in Germany, Vietnam and Czechia. Helmut Ripperger's co-authors include Klaus Schréiber, Günter Adam, Andrea Porzel, Trần Văn Sung, Uwe Himmelreich, H. Budzikiewicz, G. Anderegg, Günter Scholz, Klaus Todt and Hans Paulsen and has published in prestigious journals such as Phytochemistry, Planta Medica and Journal of Mass Spectrometry.

In The Last Decade

Helmut Ripperger

79 papers receiving 1000 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 Ripperger Germany 19 665 374 268 205 120 87 1.1k
Satyesh C. Pakrashi India 21 627 0.9× 393 1.1× 435 1.6× 137 0.7× 68 0.6× 115 1.4k
Guangzhong Tu China 22 957 1.4× 502 1.3× 369 1.4× 202 1.0× 126 1.1× 85 1.6k
Toshio Kawasaki Japan 24 1.3k 1.9× 467 1.2× 261 1.0× 138 0.7× 335 2.8× 98 1.8k
Lorenzo Mangoni Italy 19 623 0.9× 353 0.9× 290 1.1× 99 0.5× 62 0.5× 75 1.1k
E. Demole Switzerland 24 513 0.8× 361 1.0× 453 1.7× 252 1.2× 38 0.3× 51 1.5k
Н. Д. Абдуллаев Uzbekistan 12 622 0.9× 346 0.9× 292 1.1× 162 0.8× 30 0.3× 250 1.2k
Marcella Guiso Italy 21 443 0.7× 404 1.1× 415 1.5× 152 0.7× 63 0.5× 74 1.2k
J. Jurenitsch Austria 20 521 0.8× 552 1.5× 75 0.3× 348 1.7× 75 0.6× 79 1.1k
SUEO HISADA Japan 19 842 1.3× 750 2.0× 128 0.5× 108 0.5× 79 0.7× 77 1.2k
Tsutomu Nakanishi Japan 26 1.2k 1.8× 665 1.8× 359 1.3× 231 1.1× 59 0.5× 92 1.9k

Countries citing papers authored by Helmut Ripperger

Since Specialization
Citations

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

Fields of papers citing papers by Helmut Ripperger

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helmut Ripperger

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut Ripperger. A scholar is included among the top collaborators of Helmut Ripperger 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 Ripperger. Helmut Ripperger 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.
Kamperdick, Christine, et al.. (1998). Bis-indole alkaloids from Tabernaemontana bovina. Phytochemistry. 49(6). 1797–1799. 16 indexed citations
2.
Ripperger, Helmut, et al.. (1998). Indole alkaloids from tabernaemontana bovina. Phytochemistry. 49(5). 1457–1461. 14 indexed citations
3.
Ripperger, Helmut, et al.. (1998). Circular Dichroism of Cardenolides. Journal für praktische Chemie. 340(5). 476–478. 4 indexed citations
4.
Ripperger, Helmut. (1997). Steroidal alkaloid glycosides from Solanum uporo. Phytochemistry. 44(4). 731–734. 11 indexed citations
5.
Porzel, Andrea, et al.. (1996). Steroid alkaloid glycosides from Solanum coccineum. Phytochemistry. 41(6). 1633–1635. 16 indexed citations
6.
Himmelreich, Uwe, et al.. (1995). New Biflavonoids from Dragon's Blood ofDracaena cinnabari. Planta Medica. 61(4). 341–344. 26 indexed citations
7.
Ripperger, Helmut. (1995). Steroid alkaloid glycosides from Solanum robustum. Phytochemistry. 39(6). 1475–1477. 18 indexed citations
8.
Ripperger, Helmut. (1995). (S)-Scopolamine and (S)-Norscopolamine fromAtropanthe sinensis. Planta Medica. 61(3). 292–293. 2 indexed citations
9.
Ripperger, Helmut, et al.. (1995). Flavonoids of dragon's blood from Dracaena cinnabari. Phytochemistry. 38(3). 745–749. 71 indexed citations
10.
Ripperger, Helmut & Uwe Himmelreich. (1994). Anguivine and isoanguivine steroid alkaloid glycosides fromSolanum anguivi. Phytochemistry. 37(6). 1725–1727. 22 indexed citations
11.
Ripperger, Helmut & Andrea Porzel. (1992). 2α-Hydroxysoladulcidine from Lycianthes biflora. Phytochemistry. 31(2). 725–726. 6 indexed citations
12.
Faust, Jürgen, Klaus Schréiber, & Helmut Ripperger. (1984). Der „Normalisierungsfaktor” für die Tomatenmutante chloronerva. Zeitschrift für Chemie. 24(9). 330–331. 6 indexed citations
13.
Ripperger, Helmut, Alfred Preiß, & Jürgen Schmidt. (1981). O(3)-(2-Acetylamino-2-deoxy-β-d-glucopyranosyl)-oleanolic acid, a novel triterpenoid glycoside from two Pithecellobium species. Phytochemistry. 20(10). 2434–2435. 14 indexed citations
14.
Ripperger, Helmut. (1979). Schizanthin A und B, zwei neue tropanalkaloide aus Schizanthus pinnatus. Phytochemistry. 18(1). 171–173. 16 indexed citations
15.
Ripperger, Helmut, Karlheinz Seifert, A. Römer, & Jürgen Rullkötter. (1975). Isolierung von diacetoxyscirpenol aus Fusarium solani var. Coeruleum. Phytochemistry. 14(10). 2298–2299. 9 indexed citations
16.
Ripperger, Helmut. (1970). Intramolekular katalysierte Umamidierung bei N,N,N′‐Trimethyl‐succinamid. Zeitschrift für Chemie. 10(4). 141–141.
17.
Schréiber, Klaus, et al.. (1969). Synthese von Cycloartenol‐[26,27‐14C]. Zeitschrift für Chemie. 9(9). 334–334. 1 indexed citations
18.
Pracejus, H. & Helmut Ripperger. (1968). Darstellung und Konfiguration von optisch aktivem äL‐Mesityläthylamin. Zeitschrift für Chemie. 8(7). 268–269. 2 indexed citations
19.
Schréiber, Klaus & Helmut Ripperger. (1967). Notiz zur Konfiguration von Leptinidin an C‐23. Chemische Berichte. 100(4). 1381–1382. 7 indexed citations
20.
Ripperger, Helmut. (1966). Optische Rotationsdispersion und Circulardichroismus sowie ihre Anwendung in der organischen Chemie. Zeitschrift für Chemie. 6(5). 161–171. 10 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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