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Screening of Latin American Plants for Cytotoxic Activity
(2006)The SRB cytotoxicity assay was used to screen plant extracts, in a collaborative multinational OAS project involving Argentina, Bolivia, Colombia, Costa Rica, Guatemala, Nicaragua and Panama, against breast (MCF-7), lung ... -
Seco-manool and other constituents from fleischmannia microstemon
(1988-01)The aerial parts of Fleischmannia microstemon afforded in addition to sesamin and two clerodanes, ent-manoyl oxide and two derivatives of the latter, one a 6β-acetoxy derivative and the other a seco-labdane. From F. pratensis ... -
Sekikaic Acid and Lobaric Acid Target a Dynamic Interface of the Coactivator CBP/p300
(2012-10-08)Although there have been recent notable successes in thediscovery of ligands that target stable, high-affinity protein-protein interactions (PPIs), the transient and moderateaffinity PPIs that underpin many fundamental ... -
Separation of crude plant extracts with high speed CCC for primary screening in drug discovery
(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 ... -
Sesquiterpene lactones and other constituents from Calea prunifolia and C. Peckii
(1989)A re-investigation of Calea prunifolia afforded, in addition to compounds reported previously, a new eudesmanolide, a costol acetate hydroperoxide and four aromatic compounds. Calea peckii gave a large variety of aromatic ... -
Sex pheromone components of Diatraea considerata (Heinrich) (Lep., Pyralidae)
(1998-08)Three aldehydes. (Z)-11-hexadecenal (Z11–16:Ald), (Z)-7-hexadecenal (Z7–16:Ald) and (Z)-13-octadecenal (Z13–18:Ald), in a ratio of 74:23:3 are female-produced sex pheromone components of the pyralid moth, Diatraea considerata ... -
Short communication: Effect of different kefir grains on the attributes of kefir produced with milk from Costa Rica
(2020)Kefir is an artisanal product that is gaining scientific attention due to its increase in consumption attributed to its potential health benefits. The effect on the quality attributes of kefir grains of different origin ... -
Síntesis de derivados de la fenantrenoquinona con compuestos difuncionales
(1978)En este trabajo se comparó la reactividad del grupo metileno (-CH2-) en reacciones de condensación. Cuando el grupo metileneo está entre dos grupos carbonilos (compuestos 1,3-dicarbonílicos) la reactividad es mayor como ... -
Síntesis de la feromona sexual de la polilla de la papa, Scrobipalpopsis Solanivora
(1988)Se sintetizó el acetato (E) -3- dodecenilo, atrayente sexual de la polilla de la papa (Scrobipalpopsis solanivora), utilizando dos procedimientos: una ruta acetilénica y mediante la condensación de Knoevenagel. -
Síntesis de nuevas Dibenzo[f,h]cinolinas
(1985)Synthesis of new Dibenzo[f,h]cinnolines. Condensation of the compounds 9-acetonyl-9-hydroxy-10-oxo-9,10-dihydrophenanthrene (2) and 9-(2-cyclopentanonyl)-9-hydroxy-10-oxo-9,10-dihydrophenanthrene (3) with hydrazine produced ... -
Síntesis y caracterización de precursores moleculares de fuente única de bismuto con ligandos que contienen átomos dadores de oxígeno y azufre: generación de materiales conductores transparentes
(2024)La búsqueda por la generación de complejos metálicos, cuya obtención esté basada en un diseño planificado y racional, realizando variaciones estructurales a partir de distintas rutas sintéticas y deseando tener control ... -
Síntesis y evaluación de complejos de cobre (I/II) con ligandos polipiridínicos como mediadores redox en celdas solares sensibilizadas con tintes
(2020)En las celdas solares sensibilizadas con tintes (DSSCs), el mediador redox en el electrolito permite la transferencia de cargas al regenerar las moléculas del tinte durante su operación. Se sintetizaron y caracterizaron ... -
Soil Fungal Community Composition Correlates with Site-Specific Abiotic Factors, Tree Community Structure, and Forest Age in Regenerating Tropical Rainforests
(2021)Successional dynamics of plants and animals during tropical forest regeneration have been thoroughly studied, while fungal compositional dynamics during tropical forest succession remain unknown, despite the crucial roles ... -
Special Issue: Diversity of Extremophiles in Time and Space
(2021-11-30)Extreme environments are fascinating ecosystems that have allowed us to increase our knowledge about the evolutionary processes of life [1], develop new biotechnological applications (e.g., industrial applications of ... -
Stereospecific Synthesis of (E, Z)- and (Z, Z)-Hexadeca-10,12-dienal. Sex Pheromone Components of Diaphania hyalinata
(1998)Isomeric (E,Z)- and (Z,Z)-hexadeca-10,12-dienal were prepared, stereospecifically, in 51% and 43% overall yields from dec-1-yne.