Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Furfural yakatanga kusarudzwa muna 1821 (yakabudiswa muna 1832) nemakemikari wokuGermany ainzi Johann Wolfgang Döbereiner, uyo akabudisa mufananidzo muduku sechigadzirwa chefuric acid synthesis.  Mubvunzo: Döbereiner akagadzira asidhi ipi?
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