• A new species of Quararibea (Malvaceae) from Costa Rica 

      Zamora, Nelson A.; Cascante Marín, Alfredo; Choi, Sango; Kim, Soo-Yong (2017)
      Algunas colecciones previas de Quararibea nigrescens, han sido mal identificadas, confundidas o tentativamente asignadas a Quararibea costaricensis. Ambas especies se distinguen consistentemente porque Q. nigrescens siempre ...
    • Separation of crude plant extracts with high speed CCC for primary screening in drug discovery 

      Harris, Guy H.; Armbruster, Jean A.; Borris, Robert P.; Jiménez Madrigal, Quírico; Zamora, Nelson A.; Tamayo Castillo, Giselle (2001)
      High speed countercurrent chromatography (HSCCC) was used in a pre-fractionation pilot study to improve the quality of crude plant samples for primary screening in drug discovery efforts. The methanol ...