CHIZU — the atlas of coffee research
Coffee research in Saudi Arabia
Two limits come with this count. Only 100,474 of the 190,643 searchable papers (52.7%) carry an author affiliation country. The other 90,169 (47.3%) carry none. So these 1,003 papers are 1,003 out of the 100,474 whose affiliation is known. And a co-authored paper is counted once for every country its authors sit in. Per-country counts therefore do not add up to the whole.
Saudi Arabia does not grow coffee, but coffee is researched there.
Check it yourself
This is not our word for it. You can run the same query against the same index.
When they were written
1989–2026
Years before 1600 are treated as unknown. The upstream data (OpenAlex) sometimes writes 1400 when the year is missing, and that is a placeholder, not a measurement.
Where they appeared
Top 8 sources (journals and repositories)
Most cited
10 papers, most cited first
- Dietary Polyphenols and Their Role in Oxidative Stress-Induced Human Diseases: Insights Into Protective Effects, Antioxidant Potentials and Mechanism(s) of Action2022cited 1,026open access
- Production of Plant Secondary Metabolites: Examples, Tips and Suggestions for Biotechnologists2018cited 397open access
- Functional Foods and Lifestyle Approaches for Diabetes Prevention and Management2017cited 375open access
- Development and validation of ultrasound-assisted solid-liquid extraction of phenolic compounds from waste spent coffee grounds2016cited 347
- Genome-wide meta-analysis identifies six novel loci associated with habitual coffee consumption2014cited 317open access
- A Comprehensive Insight into Fungal Enzymes: Structure, Classification, and Their Role in Mankind’s Challenges2021cited 277open access
- Removal of hazardous Rhodamine dye from water by adsorption onto exhausted coffee ground2013cited 252open access
- Therapeutic Implications of Caffeic Acid in Cancer and Neurological Diseases2022cited 219open access
- Exploring waste-derived catalysts for sustainable biodiesel production: a path towards renewable energy2024cited 189
- Atmospheric Pressure Plasma Jet Composed of Three Electrodes: Application to Tooth Bleaching2009cited 172
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 1,003 papers, 373 carry one. The breakdown below is about those 373 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
Which field
Only 75.9% of the whole index carries a field label. Of this country's 1,003 papers, 687 carry one. The breakdown below is about those 687 papers only — the rest were never candidates for it.
One paper can carry several labels, so the breakdown adds up to more than that number.
What language
"undetermined" means the upstream record carried no language. We did not guess one.
Knowledge is not evenly spread
Counting only papers whose author affiliation is known, the largest is Indonesia with 22,248. Saudi Arabia has 1,003 — a factor of 22.
That gap does not follow where coffee is grown. Research gathers where the means to do research are, not where the coffee is. Making that visible is why CHIZU exists.
Other countries
Indonesia 22,248United States 17,988Brazil 10,857United Kingdom 5,569China 4,887India 3,542Germany 3,185Italy 3,111France 3,072Japan 2,822Colombia 2,489Spain 2,363