Hans‐Peter Koops

6.1k total citations · 2 hit papers
30 papers, 4.6k citations indexed

About

Hans‐Peter Koops is a scholar working on Pollution, Ecology and Molecular Biology. According to data from OpenAlex, Hans‐Peter Koops has authored 30 papers receiving a total of 4.6k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Pollution, 18 papers in Ecology and 11 papers in Molecular Biology. Recurrent topics in Hans‐Peter Koops's work include Wastewater Treatment and Nitrogen Removal (23 papers), Microbial Community Ecology and Physiology (17 papers) and Microbial Fuel Cells and Bioremediation (8 papers). Hans‐Peter Koops is often cited by papers focused on Wastewater Treatment and Nitrogen Removal (23 papers), Microbial Community Ecology and Physiology (17 papers) and Microbial Fuel Cells and Bioremediation (8 papers). Hans‐Peter Koops collaborates with scholars based in Germany, United States and Austria. Hans‐Peter Koops's co-authors include Michael Wagner, Andreas Pommerening‐Röser, Markus Schmid, Stefan Juretschko, Gabriele Rath, Ulrike Purkhold, Karl‐Heinz Schleifer, Rudolf Amann, G. Stehr and Janine A. Flood and has published in prestigious journals such as Applied and Environmental Microbiology, INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY and FEMS Microbiology Ecology.

In The Last Decade

Hans‐Peter Koops

29 papers receiving 4.3k citations

Hit Papers

align trajectories

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.

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 →
Combined Molecular and Conventional Analyses of Nitrifying Bacterium Diversity in Activated Sludge: Nitrosococcus mobilis and Nitrospira -Like Bacteria as Dominant Populations

1998 677 citations Stefan Juretschko, Markus Schmid 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						Papers	Cites
Hans‐Peter Koops Germany	24	3.6k	2.6k	1.2k	1.0k	802	30	4.6k
Е. В. Лебедева Russia	8	2.2k 0.6×	2.0k 0.8×	639 0.5×	565 0.6×	625 0.8×	39	3.3k
Laura van Niftrik Netherlands	33	2.9k 0.8×	1.7k 0.6×	1.3k 1.1×	842 0.8×	1.2k 1.5×	57	4.5k
Andreas Pommerening‐Röser Germany	17	2.0k 0.6×	1.7k 0.6×	671 0.6×	597 0.6×	524 0.7×	23	3.1k
Shanyun Wang China	36	3.8k 1.1×	1.8k 0.7×	889 0.8×	980 1.0×	318 0.4×	64	4.9k
Maartje A. H. J. van Kessel Netherlands	18	2.1k 0.6×	1.6k 0.6×	611 0.5×	590 0.6×	504 0.6×	43	3.2k
Jeanette M. Norton United States	38	1.9k 0.5×	1.9k 0.7×	730 0.6×	332 0.3×	673 0.8×	73	4.3k
Guibing Zhu China	46	5.1k 1.4×	2.6k 1.0×	1.0k 0.9×	1.1k 1.1×	468 0.6×	120	7.0k
Hanna Koch Netherlands	17	1.7k 0.5×	1.6k 0.6×	530 0.4×	485 0.5×	567 0.7×	35	2.7k
А. Г. Булаев Russia	14	1.9k 0.5×	1.5k 0.6×	565 0.5×	498 0.5×	392 0.5×	91	3.2k
Harry R. Harhangi Netherlands	28	1.6k 0.5×	1.2k 0.5×	607 0.5×	463 0.5×	1.4k 1.8×	43	3.7k

Countries citing papers authored by Hans‐Peter Koops

Since Specialization

Citations

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

Fields of papers citing papers by Hans‐Peter Koops

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hans‐Peter Koops. 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 Hans‐Peter Koops. The network helps show where Hans‐Peter Koops may publish in the future.

Co-authorship network of co-authors of Hans‐Peter Koops

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

All Works

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20 of 20 papers shown

Hornek, Romana, Andreas Pommerening‐Röser, Hans‐Peter Koops, et al.. (2005). Primers containing universal bases reduce multiple amoA gene specific DGGE band patterns when analysing the diversity of beta-ammonia oxidizers in the environment. Journal of Microbiological Methods. 66(1). 147–155. 71 indexed citations

Pommerening‐Röser, Andreas & Hans‐Peter Koops. (2004). Environmental pH as an important factor for the distribution of urease positive ammonia-oxidizing bacteria. Microbiological Research. 160(1). 27–35. 66 indexed citations

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

Sorokin, Dimitry Y., Tatjana P. Tourova, Markus Schmid, et al.. (2001). Isolation and properties of obligately chemolithoautotrophic and extremely alkali-tolerant ammonia-oxidizing bacteria from Mongolian soda lakes. Archives of Microbiology. 176(3). 170–177. 50 indexed citations

Aakra, Ågot, et al.. (2001). Detailed phylogeny of ammonia-oxidizing bacteria determined by rDNA sequences and DNA homology values.. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY. 51(6). 2021–2030. 44 indexed citations

Juretschko, Stefan, Markus Schmid, Karl‐Heinz Schleifer, et al.. (1998). Combined Molecular and Conventional Analyses of Nitrifying Bacterium Diversity in Activated Sludge: Nitrosococcus mobilis and Nitrospira -Like Bacteria as Dominant Populations. Applied and Environmental Microbiology. 64(8). 3042–3051. 677 indexed citations breakdown →

Wagner, Michael, Daniel R. Noguera, Stefan Juretschko, et al.. (1998). Combining fluorescent in situ hybridization (fish) with cultivation and mathematical modeling to study population structure and function of ammonia-oxidizing bacteria in activated sludge. Water Science & Technology. 37(4-5). 441–449. 25 indexed citations

Pommerening‐Röser, Andreas, Gabriele Rath, & Hans‐Peter Koops. (1996). Phylogenetic Diversity within the Genus Nitrosomonas. Systematic and Applied Microbiology. 19(3). 344–351. 143 indexed citations

Stehr, G., et al.. (1995). Exopolymers: An ecological characteristic of a floc-attached, ammonia-oxidizing bacterium. Microbial Ecology. 30(2). 115–26. 54 indexed citations

10.

Wagner, Michael, Gabriele Rath, Rudolf Amann, Hans‐Peter Koops, & Karl‐Heinz Schleifer. (1995). In situ Identification of Ammonia-oxidizing Bacteria. Systematic and Applied Microbiology. 18(2). 251–264. 428 indexed citations

11.

Stehr, G., et al.. (1995). The ammonia-oxidizing nitrifying population of the River Elbe estuary. FEMS Microbiology Ecology. 17(3). 177–186. 179 indexed citations

12.

Koops, Hans‐Peter, et al.. (1991). Classification of eight new species of ammonia-oxidizing bacteria: Nitrosomonas communis sp. nov., Nitrosomonas ureae sp. nov., Nitrosomonas aestuarii sp. nov., Nitrosomonas marina sp. nov., Nitrosomonas nitrosa sp. nov., Nitrosomonas eutropha sp. nov., Nitrosomonas oligotropha sp. nov. and Nitrosomonas halophila sp. nov.. Journal of General Microbiology. 137(7). 1689–1699. 203 indexed citations

13.

Koops, Hans‐Peter & Heinz Harms. (1985). Deoxyribonucleic acid homologies among 96 strains of ammonia-oxidizing bacteria. Archives of Microbiology. 141(3). 214–218. 59 indexed citations

14.

Woese, Carl R., W G Weisburg, Bruce J. Paster, et al.. (1984). The phylogeny of purple bacteria: The beta subdivision. Systematic and Applied Microbiology. 5(3). 327–336. 136 indexed citations

15.

Martiny, H & Hans‐Peter Koops. (1982). Incorporation of organic compounds into cell protein by lithotrophic, ammonia-oxidizing bacteria. Antonie van Leeuwenhoek. 48(4). 327–336. 15 indexed citations

16.

Harms, Heinz, et al.. (1981). d-Ribulose 1,5-bisphosphate carboxylase and polyhedral inclusion bodies in Nitrosomonas spec. Archives of Microbiology. 128(3). 280–281. 17 indexed citations

17.

Koops, Hans‐Peter, et al.. (1980). Serological studies on lithotrophic, ammonia oxidizing bacteria. Archives of Microbiology. 128(2). 204–208. 1 indexed citations

18.

Koops, Hans‐Peter, et al.. (1977). Polyhedral inclusion bodies in cells of nitrosomonas spec. Archives of Microbiology. 112(1). 69–72. 6 indexed citations

19.

Koops, Hans‐Peter, et al.. (1976). Isolation of a moderate halophilic ammonia-oxidizing bacterium, Nitrosococcus mobilis nov. sp.. Archives of Microbiology. 107(3). 277–282. 48 indexed citations

20.

Koops, Hans‐Peter. (1969). Der Nutzeffekt der NH4 +-Oxydation durchNitrosocystis oceanus Watson. Archives of Microbiology. 65(2). 115–135. 6 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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