Ulrike Purkhold

3.2k total citations · 1 hit paper
10 papers, 2.5k citations indexed

About

Ulrike Purkhold is a scholar working on Pollution, Ecology and Environmental Engineering. According to data from OpenAlex, Ulrike Purkhold has authored 10 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Pollution, 6 papers in Ecology and 5 papers in Environmental Engineering. Recurrent topics in Ulrike Purkhold's work include Wastewater Treatment and Nitrogen Removal (9 papers), Microbial Community Ecology and Physiology (6 papers) and Microbial Fuel Cells and Bioremediation (5 papers). Ulrike Purkhold is often cited by papers focused on Wastewater Treatment and Nitrogen Removal (9 papers), Microbial Community Ecology and Physiology (6 papers) and Microbial Fuel Cells and Bioremediation (5 papers). Ulrike Purkhold collaborates with scholars based in Germany, France and Austria. Ulrike Purkhold's co-authors include Michael Wagner, Andreas Pommerening‐Röser, Hans‐Peter Koops, Markus Schmid, Stefan Juretschko, R. Nogueira, Holger Daims, Alexander Loy, Natuschka Lee and Rudolf Amann and has published in prestigious journals such as Science, Applied and Environmental Microbiology and Water Research.

In The Last Decade

Ulrike Purkhold

10 papers receiving 2.4k citations

Hit Papers

Phylogeny of All Recognized Species of Ammonia Oxidizers ... 2000 2026 2008 2017 2000 250 500 750
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. Phylogeny of All Recognized Species of Ammonia Oxidizers Based on Comparative 16S rRNA and amoA Sequence Analysis: Implications for Molecular Diversity Surveys
    2000 913 citations Ulrike Purkhold, Andreas Pommerening‐Röser et al. Applied and Environmental Microbiology profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Ulrike Purkhold Germany 8 1.7k 1.3k 538 486 460 10 2.5k
Stefan Juretschko United States 19 2.5k 1.5× 2.0k 1.6× 855 1.6× 845 1.7× 737 1.6× 36 3.9k
Russell J. Davenport United Kingdom 30 1.4k 0.8× 1.1k 0.9× 856 1.6× 256 0.5× 615 1.3× 75 3.2k
Karl‐Heinz Schleifer Germany 17 755 0.4× 745 0.6× 887 1.6× 259 0.5× 317 0.7× 24 2.1k
Xin‐Li An China 29 2.5k 1.5× 937 0.7× 814 1.5× 171 0.4× 405 0.9× 66 3.7k
Søren Michael Karst Denmark 25 1.8k 1.0× 1.3k 1.0× 1.2k 2.2× 583 1.2× 419 0.9× 36 3.5k
Stefan Wuertz Singapore 27 880 0.5× 529 0.4× 681 1.3× 360 0.7× 273 0.6× 56 2.4k
Alan J. McCarthy United Kingdom 35 547 0.3× 1.2k 1.0× 951 1.8× 190 0.4× 190 0.4× 78 3.3k
Arnaud Dechesne Denmark 32 1.6k 1.0× 1.4k 1.1× 904 1.7× 410 0.8× 436 0.9× 81 3.5k
Tao Ma China 30 682 0.4× 612 0.5× 610 1.1× 223 0.5× 202 0.4× 137 2.8k
Elizabeth Wheeler Alm United States 18 785 0.5× 1.1k 0.9× 851 1.6× 336 0.7× 332 0.7× 32 2.6k

Countries citing papers authored by Ulrike Purkhold

Since Specialization
Citations

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

Fields of papers citing papers by Ulrike Purkhold

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ulrike Purkhold

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

All Works

10 of 10 papers shown
1.
Horn, Matthias, Astrid Collingro, Stephan Schmitz‐Esser, et al.. (2004). Illuminating the Evolutionary History of Chlamydiae. Science. 304(5671). 728–730. 331 indexed citations
2.
Schmid, Markus, Antoine Thill, Ulrike Purkhold, et al.. (2003). Characterization of activated sludge flocs by confocal laser scanning microscopy and image analysis. Water Research. 37(9). 2043–2052. 93 indexed citations
3.
Purkhold, Ulrike, et al.. (2003). 16S rRNA and amoA-based phylogeny of 12 novel betaproteobacterial ammonia-oxidizing isolates: extension of the dataset and proposal of a new lineage within the nitrosomonads. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY. 53(5). 1485–1494. 245 indexed citations
4.
Purkhold, Ulrike. (2003). Untersuchungen zur Phylogenie und Verbreitung Ammoniak oxidierender Bakterien. mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich). 1 indexed citations
5.
Wagner, Michael, Alexander Loy, R. Nogueira, et al.. (2002). Microbial community composition and function in wastewater treatment plants. Antonie van Leeuwenhoek. 81(1-4). 665–680. 328 indexed citations
6.
Nogueira, R., L. F. Melo, Ulrike Purkhold, Stefan Wuertz, & Michael Wagner. (2002). Nitrifying and heterotrophic population dynamics in biofilm reactors: effects of hydraulic retention time and the presence of organic carbon. Water Research. 36(2). 469–481. 197 indexed citations
7.
Daims, Holger, Ulrike Purkhold, Lotte Bjerrum, et al.. (2001). Nitrification in sequencing biofilm batch reactors: lessons from molecular approaches. Water Science & Technology. 43(3). 9–18. 115 indexed citations
8.
Gieseke, Armin, Ulrike Purkhold, Michael Wagner, Rudolf Amann, & Andreas Schramm. (2001). Community Structure and Activity Dynamics of Nitrifying Bacteria in a Phosphate-Removing Biofilm. Applied and Environmental Microbiology. 67(3). 1351–1362. 251 indexed citations
9.
Nogueira, R., Ulrike Purkhold, Stefan Wuertz, L. F. Melo, & Michael Wagner. (2000). Microbial population dynamics versus nitrification performance in biofilm reactors operated with different hydraulic retention times during a shift from pure ammonia oxidation to combined organic carbon and ammonia oxidation. RepositóriUM (Universidade do Minho). 2 indexed citations
10.
Purkhold, Ulrike, Andreas Pommerening‐Röser, Stefan Juretschko, et al.. (2000). Phylogeny of All Recognized Species of Ammonia Oxidizers Based on Comparative 16S rRNA and amoA Sequence Analysis: Implications for Molecular Diversity Surveys. Applied and Environmental Microbiology. 66(12). 5368–5382. 913 indexed citations breakdown →

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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