{"ok":true,"nota":{"id":"24402bfd2e79b43e","slug":"bacterias-que-reciclan-azufre-cambian-como-se-forma-el-pirita-en-el-ba-24402b","titulo":"Bacterias que reciclan azufre cambian cómo se forma el pirita en el barro","resumen":"Científicos cultivaron bacterias solas y en pareja, con otras que procesan azufre, para observar cómo el hierro y el azufre forman minerales en sedimentos. Compararon el resultado con cultivos tradicionales.","fuente":"biorxiv","fuenteNombre":"bioRxiv · preprints","color":"#be2628","autor":"Santha, K., Duverger, A., Marin-Carbonne, J., Berg, J.","url":"https://www.biorxiv.org/content/10.64898/2026.10.20.753417v1?rss=1","imagen":"/hoy/portada/24402bfd2e79b43e","tema":"ciencia","subtemas":["geología","microbiología","pirita","azufre","historia de la tierra"],"entidades":["bacterias reductoras de sulfato","pirita"],"formato":"dato","entretenimiento":false,"pubTs":"2026-10-21T00:00:00.000Z","indexTs":"2026-10-22T04:37:56.220Z","hash":"3e47e235b3f1ac374de0d355b0a3635a1a023931ca4d6d4112f2428bccd2af2e","tsa":{"time":"Oct 22 04:38:21 2026 GMT","provider":"freetsa.org","sobre":"sello"},"stats":{"views":0,"likes":0,"clicks":0,"dwell":0},"tipo":"normal","registro":"hallazgo","porQueImporta":"El mineral que se forma en el barro sin oxígeno guarda registros de cómo era el planeta hace mucho tiempo, incluido el momento en que subió el oxígeno de la atmósfera. Este trabajo muestra que las comunidades de bacterias reales cambian ese proceso respecto de lo que se creía con cultivos simples. Para quien estudia el pasado terrestre, eso significa que leer esas rocas exige tener en cuenta a los microbios que vivían ahí.","quienFirma":"bioRxiv (preprint; institución principal no especificada en el resumen)","confianza":"preprint","consulta":null},"sello":{"hash":"3e47e235b3f1ac374de0d355b0a3635a1a023931ca4d6d4112f2428bccd2af2e","sello":"2c2f82c26f36db344a42537eccd35c66c8e9b60c3662603e31ca0b0d06810352","beacon":{"drand":{"cadena":"8990e7a9aaed2ffed73dbd7092123d6f289930540d7651336225dc172e51b2ce","ronda":6573762,"aleatorio":"2bf3d68605c0cf93c7b24bcf7d4852029c1a8fd2dd29c3bf1b3b697bee72ee36","tiempo":"2026-10-22T04:38:00.000Z"},"nist":{"cadena":2,"pulso":1994086,"salida":"7C444532759162AF322A7FA62FB67EDB4DE6FC6E7A6186DDCB567613FCA6BF322E4D0A282AEEE85DC1460DE99BE46FB63B8A2617A10BE805A6618E195E0116AC","tiempo":"2026-10-22T04:37:00.000Z"},"noAntes":"2026-10-22T04:38:00.000Z"},"verificacion":{"drand":true,"nist":true},"tsa":{"time":"Oct 22 04:38:21 2026 GMT","provider":"freetsa.org","sobre":"sello"},"original":{"titulo":"A sulfur-cycling co-culture alters iron sulfide diagenesis and pyritization","descripcion":"Iron sulfide minerals play a key role in modulating the oxygenation of Earth s atmosphere and represent an archive for reconstructing past environmental conditions. In anoxic sedimentary environments, microbially produced sulfide reacts with iron, thereby forming metastable iron sulfides (mackinawite, greigite) which are expected to transform into pyrite, the most thermodynamically stable phase. However, our understanding of this process mostly stems from pure cultures grown on sulfate, which fails to capture the complexity of natural microbial communities and subsequent sedimentary changes. To this end, we set up pure and co-culture incubations of sulfate- and sulfur-reducing bacteria with ","pubDate":"2026-10-21","url":"https://www.biorxiv.org/content/10.64898/2026.10.20.753417v1?rss=1"},"indexado":"2026-10-22T04:37:56.220Z"}}