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Sub‑micron patterning of metal oxide surfaces via microcontact printing and microtransfer molding of amphiphilic molecules and antifouling application
(2023)
Low cost, potentially scalable soft lithography approaches are employed here to generate nano
and microscale line patterns of n-octadecylphosphonic acid and n-octadecyltriethoxysilane
with thicknesses ranging from 2 up ...
A new method for the preparation of 1,3-dilithiopropyne: an efficient synthesis of homopropargyl alcohols
(2001)
Controlled dilithiation of propargyl bromide with two equivalents of n-butyllithium, in the presence of TMEDA, produces the operational equivalent of the dianion 1,3-dilithiopropyne. The latter reacts efficiently with ...
Recolección y preservación de muestras para la medición de variables del sistema de CO2 en aguas marino - costeras
(2021-10)
El texto tiene como objetivo establecer el procedimiento de recolección y preservación de muestras de agua de mar para la medición de variables del sistema de carbonatos.
Aggregation pheromone of palmetto weevil, Rhynchophorus cruentatus (F.) (Coleoptera: Curculionidae)
(1994)
5-Methyl-4-octanol is the major aggregation pheromone of the palmetto weevil,Rhynchophorus cruentatus (F.). The pheromone (cruentol) was identified by coupled gas chromatographic-electroantennographic (GC-EAD) analysis of ...
Chemical composition of essential oils of the tree Melaleuca quinquenervia (Myrtaceae) cultivated in Costa Rica
(2021-04-21)
Introduction: Melaleuca is a Myrtaceous genus of flowering plants of about 290 species, distributed throughout Indonesia, Papua New Guinea, Australia, and New Caledonia. Objective: To identify the chemical composition of ...
Synthesis and Determination of Antitumor Activity of Jacaranone and Synthetic Analogs
(2018)
Natural product jacaranone, 1, and three analog derivatives were synthesized and their apoptotic and necrotic activity against four cancer cell lines was tested. One of these derivatives 7, was more active than the natural ...
Fisico-química de las aguas superficiales de la Cuenca del río Rincón, Península de Osa, Costa Rica
Hydrochemistry of the surface waters at the Rincon River Basin, Osa Peninsula, Costa Rica
(2010-12)
The Rincon River Basin is characterized by steep and rugged topography with outcrops of recent sediments as well as igneous and sedimentary rocks. The area is mostly covered by forest (Tropical Wet Forest) and agricultural ...
Calidad del Aire en la Sede Central Rodrigo Facio de la Universidad De Costa Rica
(2014-12)
Este estudio vigiló la calidad del aire en la Sede Universitaria Rodrigo Facio de la Universidad de Costa Rica con el fin de mantener informadas a las autoridades universitarias, cantonales, del Ministerio de Ambiente y ...
Heterogeneous Water Oxidation: Surface Activity versus Amorphization Activation in Cobalt Phosphate Catalysts
(2015)
Is water oxidation catalyzed at the surface or within the bulk volume of solid oxide materials? This question is addressed for cobalt phosphate catalysts deposited on inert electrodes, namely crystallites of pakhomovskyite ...