H. Frei

2.1k total citations · 1 hit paper
22 papers, 1.8k citations indexed

About

H. Frei is a scholar working on Molecular Biology, Plant Science and Cancer Research. According to data from OpenAlex, H. Frei has authored 22 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 8 papers in Molecular Biology, 7 papers in Plant Science and 7 papers in Cancer Research. Recurrent topics in H. Frei's work include Carcinogens and Genotoxicity Assessment (7 papers), Insect Resistance and Genetics (4 papers) and Pesticide Exposure and Toxicity (3 papers). H. Frei is often cited by papers focused on Carcinogens and Genotoxicity Assessment (7 papers), Insect Resistance and Genetics (4 papers) and Pesticide Exposure and Toxicity (3 papers). H. Frei collaborates with scholars based in Switzerland, Netherlands and Israel. H. Frei's co-authors include F.E. Würgler, Ulrich Gräf, Alan J. Katz, H. Juon, C. B. Hall, P.G. Kale, Denise Howe, Julie Clements, Christian Schlatter and Jürg Lüthy and has published in prestigious journals such as Fertility and Sterility, Chemico-Biological Interactions and Archives of Toxicology.

In The Last Decade

H. Frei

22 papers receiving 1.7k citations

Hit Papers

Somatic mutation and recombination test in Drosophila mel... 1984 2026 1998 2012 1984 100 200 300 400 500
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.

  1. Somatic mutation and recombination test in Drosophila melanogaster
    1984 564 citations Ulrich Gräf, F.E. Würgler et al. Environmental Mutagenesis profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
H. Frei Switzerland 12 986 664 615 280 228 22 1.8k
Ulrich Gräf Switzerland 26 1.2k 1.2× 840 1.3× 832 1.4× 340 1.2× 343 1.5× 94 2.4k
Tomoe Negishi Japan 20 776 0.8× 544 0.8× 352 0.6× 192 0.7× 60 0.3× 73 1.7k
Motoi Ishidate Japan 11 566 0.6× 886 1.3× 396 0.6× 425 1.5× 30 0.1× 28 1.5k
Tong-man Ong United States 22 456 0.5× 666 1.0× 363 0.6× 377 1.3× 28 0.1× 57 1.3k
Sakae Arimoto Japan 17 571 0.6× 630 0.9× 267 0.4× 232 0.8× 30 0.1× 49 1.4k
Hiroyasu Shimada Japan 21 670 0.7× 720 1.1× 341 0.6× 401 1.4× 86 0.4× 46 1.6k
Erika Pfeiffer Germany 32 764 0.8× 416 0.6× 1.4k 2.3× 225 0.8× 232 1.0× 63 2.8k
Y. Shirasu Japan 17 405 0.4× 771 1.2× 549 0.9× 295 1.1× 67 0.3× 48 1.4k
Michael J. Prival United States 18 713 0.7× 658 1.0× 406 0.7× 319 1.1× 37 0.2× 34 1.6k
T. Nohmi Japan 28 1.6k 1.6× 1.1k 1.7× 479 0.8× 348 1.2× 17 0.1× 53 2.8k

Countries citing papers authored by H. Frei

Since Specialization
Citations

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

Fields of papers citing papers by H. Frei

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of H. Frei

This figure shows the co-authorship network connecting the top 25 collaborators of H. Frei. A scholar is included among the top collaborators of H. Frei 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 H. Frei. H. Frei 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.
Frei, H. & F.E. Würgler. (1997). The vicinal chloroalcohols 1,3-dichloro-2-propanol (DC2P), 3-chloro-1,2-propanediol (3CPD) and 2-chloro-1,3-propanediol (2CPD) are not genotoxic in vivo in the wing spot test of Drosophila melanogaster. Mutation Research/Genetic Toxicology and Environmental Mutagenesis. 394(1-3). 59–68. 18 indexed citations
2.
3.
Frei, H. & F.E. Würgler. (1995). Optimal experimental design and sample size for the statistical evaluation of data from somatic mutation and recombination tests (SMART) in Drosophila. Mutation Research/Environmental Mutagenesis and Related Subjects. 334(2). 247–258. 192 indexed citations
4.
Frei, H., Julie Clements, Denise Howe, & F.E. Würgler. (1992). The genotoxicity of the anti-cancer drug mitoxantrone in somatic and germ cells of Drosophila melanogaster. Mutation Research/Genetic Toxicology. 279(1). 21–33. 102 indexed citations
5.
6.
Frei, H.. (1991). Somatic mutation and recombination tests (SMART) in drosophila. Mutation Research/Environmental Mutagenesis and Related Subjects. 252(2). 169–170. 4 indexed citations
7.
Würgler, F.E., et al.. (1990). Genetic toxicity of six carcinogens and six non-carcinogens in the Drosophila wing spot test. Mutation Research/Genetic Toxicology. 242(3). 169–180. 37 indexed citations
8.
Gräf, Ulrich, et al.. (1989). Thirty compounds tested in the Drosophila wing spot test. Mutation Research/Genetic Toxicology. 222(4). 359–373. 172 indexed citations
9.
Frei, H. & F.E. Würgler. (1988). Statistical methods to decide whether mutagenicity test data from Drosophila assays indicate a positive, negative, or inconclusive result. Mutation Research/Environmental Mutagenesis and Related Subjects. 203(4). 297–308. 450 indexed citations
10.
Frei, H. & F.E. Würgler. (1987). Genotoxicity of the DNA-synthesis inhibitors hydroxyurea and aminopterin in the wing spot test of Drosophila. Mutation Research/Environmental Mutagenesis and Related Subjects. 182(5). 280–280. 1 indexed citations
11.
Frei, H., F.E. Würgler, H. Juon, C. B. Hall, & Ulrich Gräf. (1985). Aristolochic acid is mutagenic and recombinogenic in Drosophila genotoxicity tests. Archives of Toxicology. 56(3). 158–166. 29 indexed citations
12.
Gräf, Ulrich, F.E. Würgler, Alan J. Katz, et al.. (1984). Somatic mutation and recombination test in Drosophila melanogaster. Environmental Mutagenesis. 6(2). 153–188. 564 indexed citations breakdown →
13.
14.
Frei, H., et al.. (1980). Development Capacities of Mixed Normal and Neoplastic 1(3)gl Imaginal Discs and Neuroblast Tissue in Drosophila hydei. Differentiation. 17(1-3). 187–192. 3 indexed citations
15.
Frei, H.. (1978). Mutation, recombination and genetic organization in Drosophila hydei, compared to other Drosophila species.. PubMed. 49-50(1). 42–69. 2 indexed citations
16.
Frei, H.. (1975). Intragenic recombination at the white locus of Drosophila hydei. Molecular and General Genetics MGG. 142(2). 105–117. 3 indexed citations
17.
Frei, H.. (1974). Radiation-induced dominant lethality in oocytes of Drosophila hydei, with emphasis on differential sensitivity of the immature stages in class B. Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis. 24(2). 125–134. 2 indexed citations
18.
Frei, H.. (1974). [Differential radiosensitivity of the germ cells in Drosophila hydei males, lethal rates and the relevance of the species-specific genetic organization (author's transl)].. PubMed. 47(3). 136–71. 4 indexed citations
19.
Uehlinger, E., et al.. (1952). [First experiences with rimifon Roche in experimental tuberculosis of guinea pigs].. PubMed. 82(13). 335–8. 1 indexed citations
20.
Frei, H., et al.. (1951). Electron Microscopic Studies of Normal and Pathologic Human Spermatozoa. Fertility and Sterility. 2(4). 332–341. 7 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Ulrich Gräf Breakdown of academic impact, for papers by Tomoe Negishi Breakdown of academic impact, for papers by Motoi Ishidate Breakdown of academic impact, for papers by Tong-man Ong Breakdown of academic impact, for papers by Sakae Arimoto Breakdown of academic impact, for papers by Hiroyasu Shimada Breakdown of academic impact, for papers by Erika Pfeiffer Breakdown of academic impact, for papers by Y. Shirasu Breakdown of academic impact, for papers by Michael J. Prival Breakdown of academic impact, for papers by T. Nohmi
Rankless by CCL
2026