CHIZU — the atlas of coffee research
Coffee research in Angola
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 13 papers are 13 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.
Angola is a coffee-producing country.
Check it yourself
This is not our word for it. You can run the same query against the same index.
When they were written
1998–2025
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
- Electrolyte leakage and lipid degradation account for cold sensitivity in leaves ofCoffea sp. plants2003cited 510
- Host‐jump drives rapid and recent ecological speciation of the emergent fungal pathogen Colletotrichum kahawae2012cited 82open access
- Photosynthetic Performance and Pigment Composition of Leaves from two Tropical Species is Determined by Light Quality2002cited 78
- Cold Acclimation Ability and Photosynthesis among Species of the Tropical Coffea Genus2003cited 72open access
- High Irradiance Impairments on Photosynthetic Electron Transport, Ribulose-1,5-bisphosphate Carboxylase/ oxygenase and N Assimilation as a Function of N Availability in Coffea arabica L. Plants1999cited 50
- Prospective comparison between mannan-oligosaccharide (MOS) and other hemicellulose-derived oligosaccharides2024cited 5
- Chilling Effects on Photosynthetic Activity and Membrane Leakage of Two Species of Coffea1998cited 3
- Out of Africa: The genomic footprints of Vietnamese Robusta coffee2025cited 2open access
- Use of Organic Waste from Coffee Capsules in the Adsorption of Cu(II), Co(II), Ni(II) and Cd(II) Ions in Aqueous Systems2020cited 2open access
- Valorization of Green Arabica Coffee Coproducts for Mannanase Production and Carbohydrate Recovery2025cited 1open access
Which stage of coffee
Only 30.2% of the whole index carries a stage label. Of this country's 13 papers, 1 carry one. The breakdown below is about those 1 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 13 papers, 9 carry one. The breakdown below is about those 9 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. Angola has 13 — a factor of 1,711.
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