Walter Callen

10 total papers · 781 total citations
10 papers, 578 citations indexed

About

Walter Callen is a scholar working on Molecular Biology, Biotechnology and Biomedical Engineering. According to data from OpenAlex, Walter Callen has authored 10 papers receiving a total of 578 indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Molecular Biology, 6 papers in Biotechnology and 6 papers in Biomedical Engineering. Recurrent topics in Walter Callen’s work include Enzyme Production and Characterization (6 papers), Biofuel production and bioconversion (6 papers) and Enzyme Catalysis and Immobilization (3 papers). Walter Callen is often cited by papers focused on Enzyme Production and Characterization (6 papers), Biofuel production and bioconversion (6 papers) and Enzyme Catalysis and Immobilization (3 papers). Walter Callen collaborates with scholars based in United States, United Kingdom and Costa Rica. Walter Callen's co-authors include Eric J. Mathur, Robert M. Kelly, Dan E. Robertson, Jay M. Short, Marjory A. Snead, Michael Bauer, Xuqiu Tan, Gerhard Frey, John L. Macomber and Carl A. Miller and has published in prestigious journals such as Nucleic Acids Research, Journal of Biological Chemistry and Applied and Environmental Microbiology.

Co-authorship network of co-authors of Walter Callen

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

Walter Callen

10 papers receiving 553 citations

Fields of papers citing papers by Walter Callen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Countries citing papers authored by Walter Callen

Since Specialization
Citations

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

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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2026