Holger Penning

947 total citations
14 papers, 780 citations indexed

About

Holger Penning is a scholar working on Environmental Chemistry, Ecology and Global and Planetary Change. According to data from OpenAlex, Holger Penning has authored 14 papers receiving a total of 780 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Environmental Chemistry, 5 papers in Ecology and 5 papers in Global and Planetary Change. Recurrent topics in Holger Penning's work include Methane Hydrates and Related Phenomena (6 papers), Anaerobic Digestion and Biogas Production (4 papers) and Atmospheric and Environmental Gas Dynamics (3 papers). Holger Penning is often cited by papers focused on Methane Hydrates and Related Phenomena (6 papers), Anaerobic Digestion and Biogas Production (4 papers) and Atmospheric and Environmental Gas Dynamics (3 papers). Holger Penning collaborates with scholars based in Germany, United States and Netherlands. Holger Penning's co-authors include Ralf Conrad, Martin Elsner, Armin Meyer, Caroline M. Plugge, Pierre E. Galand, Peter Casper, Peter Claus, Tillmann Lueders, Frederick von Netzer and Rainer U. Meckenstock and has published in prestigious journals such as Environmental Science & Technology, Analytical Chemistry and Geochimica et Cosmochimica Acta.

In The Last Decade

Holger Penning

14 papers receiving 754 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Holger Penning Germany	14	298	275	271	155	154	14	780
Christof Achtnich Germany	8	248 0.8×	216 0.8×	189 0.7×	97 0.6×	109 0.7×	11	730
Yuanfeng Cai China	15	343 1.2×	179 0.7×	329 1.2×	171 1.1×	66 0.4×	38	940
Takeshi Terada Japan	16	420 1.4×	257 0.9×	560 2.1×	74 0.5×	64 0.4×	28	1.0k
Carolyn M. Aitken United Kingdom	10	446 1.5×	600 2.2×	305 1.1×	244 1.6×	78 0.5×	11	1.3k
Grażyna Kowalewska Poland	23	207 0.7×	265 1.0×	215 0.8×	124 0.8×	468 3.0×	58	1.2k
James F. McNabb United States	9	218 0.7×	382 1.4×	285 1.1×	70 0.5×	159 1.0×	10	907
Ulrike Jaekel United States	10	284 1.0×	129 0.5×	282 1.0×	89 0.6×	24 0.2×	15	582
A. Jobson Canada	9	101 0.3×	423 1.5×	99 0.4×	152 1.0×	140 0.9×	13	869
Anna C. Palmisano United States	21	167 0.6×	117 0.4×	565 2.1×	226 1.5×	44 0.3×	29	1.5k
Ernest Chi Fru United Kingdom	16	219 0.7×	109 0.4×	130 0.5×	62 0.4×	66 0.4×	58	822

Countries citing papers authored by Holger Penning

Since Specialization

Citations

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

Fields of papers citing papers by Holger Penning

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Holger Penning

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

All Works

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14 of 14 papers shown

Price, Paul S., Mick Hamer, Xianglu Han, et al.. (2012). A decision tree for assessing effects from exposures to multiple substances. Environmental Sciences Europe. 24(1). 40 indexed citations

Penning, Holger, Sebastian R. Sørensen, Armin Meyer, Jens Aamand, & Martin Elsner. (2010). C, N, and H Isotope Fractionation of the Herbicide Isoproturon Reflects Different Microbial Transformation Pathways. Environmental Science & Technology. 44(7). 2372–2378. 50 indexed citations

Penning, Holger, et al.. (2010). DNA-SIP identifies sulfate-reducing Clostridia as important toluene degraders in tar-oil-contaminated aquifer sediment. The ISME Journal. 4(10). 1314–1325. 92 indexed citations

Meyer, Armin, Holger Penning, & Martin Elsner. (2009). C and N Isotope Fractionation Suggests Similar Mechanisms of Microbial Atrazine Transformation Despite Involvement of Different Enzymes (AtzA and TrzN). Environmental Science & Technology. 43(21). 8079–8085. 90 indexed citations

Penning, Holger, Christopher J. Cramer, & Martin Elsner. (2008). Rate-Dependent Carbon and Nitrogen Kinetic Isotope Fractionation in Hydrolysis of Isoproturon. Environmental Science & Technology. 42(21). 7764–7771. 29 indexed citations

Meyer, Armin, et al.. (2008). Precise and Accurate Compound Specific Carbon and Nitrogen Isotope Analysis of Atrazine: Critical Role of Combustion Oven Conditions. Environmental Science & Technology. 42(21). 7757–7763. 54 indexed citations

Penning, Holger & Martin Elsner. (2007). Intramolecular Carbon and Nitrogen Isotope Analysis by Quantitative Dry Fragmentation of the Phenylurea Herbicide Isoproturon in a Combined Injector/Capillary Reactor Prior to GC Separation. Analytical Chemistry. 79(21). 8399–8405. 22 indexed citations

Penning, Holger & Ralf Conrad. (2007). Quantification of carbon flow from stable isotope fractionation in rice field soils with different organic matter content. Organic Geochemistry. 38(12). 2058–2069. 63 indexed citations

Penning, Holger & Ralf Conrad. (2006). Carbon isotope effects associated with mixed-acid fermentation of saccharides by Clostridium papyrosolvens. Geochimica et Cosmochimica Acta. 70(9). 2283–2297. 69 indexed citations

10.

Penning, Holger, Peter Claus, Peter Casper, & Ralf Conrad. (2006). Carbon Isotope Fractionation during Acetoclastic Methanogenesis by Methanosaeta concilii in Culture and a Lake Sediment. Applied and Environmental Microbiology. 72(8). 5648–5652. 89 indexed citations

11.

Penning, Holger & Ralf Conrad. (2006). Effect of Inhibition of Acetoclastic Methanogenesis on Growth of Archaeal Populations in an Anoxic Model Environment. Applied and Environmental Microbiology. 72(1). 178–184. 37 indexed citations

12.

Penning, Holger, Susan Tyler, & Ralf Conrad. (2006). Determination of isotope fractionation factors and quantification of carbon flow by stable carbon isotope signatures in a methanogenic rice root model system. Geobiology. 4(2). 109–121. 17 indexed citations

13.

Penning, Holger, Caroline M. Plugge, Pierre E. Galand, & Ralf Conrad. (2005). Variation of carbon isotope fractionation in hydrogenotrophic methanogenic microbial cultures and environmental samples at different energy status. Global Change Biology. 11(12). 2103–2113. 105 indexed citations

14.

Nzengung, Valentine A., et al.. (2004). Mechanistic Changes During Phytoremediation of Perchlorate Under Different Root-Zone Conditions. International Journal of Phytoremediation. 6(1). 63–83. 23 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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