A scientist’s position in this ranking is determined by their D-index (Discipline H-index), a metric which refines the traditional H-index by focusing exclusively on publications and citation data within the examined academic discipline of Chemistry. This ensures a highly discipline-specific evaluation of scholarly output and impact.
Scope of Research and Eligibility Criteria
In the development of this ranking, a total of 279,971 scientist profiles across all disciplines were examined from diverse bibliometric data sources, including 1 scientist specifically identified within the discipline of Chemistry in Jordan. To qualify for inclusion in the Chemistry ranking, researchers were required to meet a minimum D-index threshold of 40, reflecting significant academic contribution within the field.
Furthermore, the qualifying scientists had to have a majority of their tier publications published in Chemistry-focused journals and conferences. Besides bibliometric criteria, individual achievements and awards related to Chemistry were also taken into consideration to recognize distinguished contributions to the discipline.
The D-index threshold for recognizing top researchers is set dynamically as increments of 10, depending on estimated discipline size and scholar population, to ensure that the top 1% of leading scientists are consistently incorporated. Additionally, candidates were evaluated for a proximity of 30% or less between their overall H-index and their D-index, ensuring alignment between general scholarly productivity and discipline-specific excellence.
Additional Verification Practices
Understanding the limitations of raw bibliometric data as an absolute tool for evaluating scholarly output, the Research.com team undertook extensive manual verification of all scientist profiles. These were cross-correlated against publications in a wide range of trustworthy sources to verify accuracy and authenticity. This meticulous process helps mitigate any potential discrepancies, reinforcing the credibility of the ranking.
While a researcher’s number of publications in prominent journals and conference proceedings does not directly impact their position in the Research.com ranking, it is regarded as a valuable secondary signal of a scientist’s contribution to the discipline. The core positioning relies on the D-index, calculated using data from OpenAlex and CrossRef — two of the most established and widely recognized bibliometric databases supporting the global research community.
For a comprehensive understanding of the methodology employed in compiling this ranking, we encourage interested readers to visit our methodology page.
Research.com’s Agenda Behind the Ranking
At Research.com, our mission is to motivate researchers, companies, and policymakers around the world to recognize trends in leading scientific expertise and innovation. By identifying and publicizing the foremost experts in specific areas of study — across different countries and research institutions — we provide a valuable platform for the global scientific community to acknowledge and engage with top-tier researchers.
This ranking exemplifies our commitment to transparent, data-driven evaluation combined with thoughtful expert validation. We strive to foster collaboration, inspire excellence, and guide informed decision-making to advance science at local, national, and international levels.
