Alan R. Harker

886 total citations
21 papers, 652 citations indexed

About

Alan R. Harker is a scholar working on Pollution, Molecular Biology and Plant Science. According to data from OpenAlex, Alan R. Harker has authored 21 papers receiving a total of 652 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Pollution, 9 papers in Molecular Biology and 7 papers in Plant Science. Recurrent topics in Alan R. Harker's work include Microbial bioremediation and biosurfactants (8 papers), Legume Nitrogen Fixing Symbiosis (7 papers) and Wastewater Treatment and Nitrogen Removal (5 papers). Alan R. Harker is often cited by papers focused on Microbial bioremediation and biosurfactants (8 papers), Legume Nitrogen Fixing Symbiosis (7 papers) and Wastewater Treatment and Nitrogen Removal (5 papers). Alan R. Harker collaborates with scholars based in United States, Ghana and South Korea. Alan R. Harker's co-authors include Y Kim, Harold J. Evans, F. J. Hanus, R H Olsen, Ramon J. Seidler, Mohammed Zuber, Donald P. Breakwell, Patricia Ayoubi, Sterling A. Russell and Keith Filer and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of Biological Chemistry and Applied and Environmental Microbiology.

In The Last Decade

Alan R. Harker

19 papers receiving 608 citations

Peers

Countries citing papers authored by Alan R. Harker

Since Specialization

Citations

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

Fields of papers citing papers by Alan R. Harker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Alan R. Harker. 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 Alan R. Harker. The network helps show where Alan R. Harker may publish in the future.

Co-authorship network of co-authors of Alan R. Harker

This figure shows the co-authorship network connecting the top 25 collaborators of Alan R. Harker. A scholar is included among the top collaborators of Alan R. Harker 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 Alan R. Harker. Alan R. Harker 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

#	Work	Indexed citations
1	Bacterial Dormancy Is More Prevalent in Freshwater than Hypersaline Lakes 2016 ·Frontiers in Microbiology ·Zachary T. Aanderud, (unknown), Jay T. Lennon, (unknown), Donald P. Breakwell, Alan R. Harker	46
2	Life in extreme environments: microbial diversity in Great Salt Lake, Utah 2014 ·Extremophiles ·Loubna Tazi, Donald P. Breakwell, Alan R. Harker, Keith A. Crandall	57
3	Whole-Cell Kinetics of Trichloroethylene Degradation by Phenol Hydroxylase in a Ralstonia eutropha JMP134 Derivative 1998 ·Applied and Environmental Microbiology ·Patricia Ayoubi, Alan R. Harker	23
4	Identification of the Inducing Agent of the 2,4-Dichlorophenoxyacetic Acid Pathway Encoded by Plasmid pJP4 1997 ·Applied and Environmental Microbiology ·Keith Filer, Alan R. Harker	30
5	Cloning and Characterization of the Regulatory Genes phlR1 and phlR2 Involved in Phenol Metabolism from Alcaligenes eutrophus JMP134 1997 ·Molecules and Cells ·Young‐Jun Kim, Alan R. Harker	1
6	Constitutive expression of the cloned phenol hydroxylase gene(s) from Alcaligenes eutrophus JMP134 and concomitant trichloroethylene oxidation 1996 ·Applied and Environmental Microbiology ·Y Kim, Patricia Ayoubi, Alan R. Harker	22
7	Analysis of duplicated gene sequences associated with tfdR and tfdS in Alcaligenes eutrophus JMP134 1994 ·Journal of Bacteriology ·(unknown), Alan R. Harker	61
8	2,4-D degradation in monoculture biofilm reactors 1993 ·Water Research ·(unknown), (unknown), Alan R. Harker	17
9	Trichloroethylene degradation by two independent aromatic-degrading pathways in Alcaligenes eutrophus JMP134 1990 ·Applied and Environmental Microbiology ·Alan R. Harker, Y Kim	81
10	Phenoxyacetic acid degradation by the 2,4-dichlorophenoxyacetic acid (TFD) pathway of plasmid pJP4: mapping and characterization of the TFD regulatory gene, tfdR 1989 ·Journal of Bacteriology ·Alan R. Harker, R H Olsen, Ramon J. Seidler	80
11	Physiology, Biochemistry, and Genetics of the Uptake Hydrogenase in Rhizobia 1987 ·Annual Review of Microbiology ·Harold J. Evans, Alan R. Harker, H. Papen, Sterling A. Russell, F. J. Hanus, Mohammed Zuber	82
12	Symbiotic Expression of Cosmid-Borne Bradyrhizobium japonicum Hydrogenase Genes 1987 ·Applied and Environmental Microbiology ·Grant R. Lambert, Alan R. Harker, Michael A. Cantrell, F. J. Hanus, Sterling A. Russell, Richard A. Haugland, Harold J. Evans	26
13	Immunological homology between the membrane-bound uptake hydrogenases of Rhizobium japonicum and Escherichia coli 1986 ·Journal of Bacteriology ·Alan R. Harker, Mohammed Zuber, Harold J. Evans	18
14	NAD(P)H Bispecific nitrate reductase in barley leaves: Partial purification and characterization 1986 ·Phytochemistry ·Alan R. Harker, (unknown), R. L. Warner, Andris Kleinhofs	16
15	Cloning and expression of Bradyrhizobium japonicum uptake hydrogenase structural genes in Escherichia coli. 1986 ·Proceedings of the National Academy of Sciences ·Mohammed Zuber, Alan R. Harker, (unknown), Harold J. Evans	14
16	Further evidence that two unique subunits are essential for expression of hydrogenase activity in Rhizobium japonicum 1985 ·Journal of Bacteriology ·Alan R. Harker, Grant R. Lambert, F. J. Hanus, Harold J. Evans	12
17	Evidence for two nonidentical subunits of bacterioferritin from Azotobacter vinelandii 1985 ·Journal of Bacteriology ·Alan R. Harker, L. H. Wullstein	11
18	Some properties of the nickel-containing hydrogenase of chemolithotrophically grown Rhizobium japonicum 1984 ·Journal of Bacteriology ·Alan R. Harker, (unknown), F. J. Hanus, Harold J. Evans	50
19	Resolution of two subunits from the molybdenum-iron protein of Azotobacter vinelandii nitrogenase. 1981 ·Journal of Biological Chemistry ·Alan R. Harker, L. H. Wullstein	2
20	Resolution of two subunits from the molybdenum-iron protein of Azotobacter vinelandii nitrogenase. 1981 ·PubMed ·Alan R. Harker, L. H. Wullstein	2

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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