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Manganese and cobalt redox cycling in laterites; Biogeochemical and bioprocessing implications
(2020)
Cobalt is essential for the modern technology that underpins the decarbonisation of our economies, but its supply is limited leading to its designation as a critical metal. Cobalt biogeochemistry is poorly understood, yet ...
A new and efficient synthesis of (3E,8Z,11Z)-tetradeca-3,8,11-trienyl acetate, the major sex pheromone component of the tomato leafminer Tuta absoluta
(2018)
An efficient synthesis of (3E,8Z,11Z)-tetradeca-3,8,11-trienyl acetate, the major sex pheromone component of the tomato leafminer moth, Tuta absoluta, was accomplished. The synthesis started with but-3-yn-1-ol and gave an ...
Aggregation Pheromones and Host Kairomones of West Indian Sugarcane Weevil, Metamasius hemipterus sericeus
(1997)
Coupled gas chromatographic–electroantennographic detection (GC-EAD) analyses and coupled GC-mass spectrometry (MS) of volatiles produced by male and female West Indian sugarcane weevils (WISW), Metamasius hemipterus ...
Análisis fisicoquímico no invasivo de colgantes hachoides de piedras verdes de las colecciones arqueológicas del Museo Nacional de Costa Rica y del Museo del Jade y de la Cultura Precolombina
(2021-05)
Las sociedades precolombinas de la actual Costa Rica formaron uno de los principales
centros de producción de artefactos de jade y piedras verdes de Mesoamérica, los
colgantes hachoides fabricados en el actual territorio ...
Light Reflection by Cuticles of Chrysina Jewel Scarabs: Optical Measurements, Morphology Characterization, and Theoretical Modeling
(2016)
Cuticles of some Chrysina scarabs are characterized by flat, graded, and twisted structures of nanosized chitin fibrils. As inferred from SEM images, each species has its own spatial period or pitch P which is dependent ...
Residuos, sorción y desorción del herbicida paraquat en suelos tropicales
(1987-11-24)
Se analizaron por espectrofotometría residuos del herbicida Paraquat en muestras de suelos tropicales de Costa Rica dedicados al cultivo del café y donde el Paraquat es aplicado desde hace alrededor de 20 años, una o dos ...
The Bacterial Product Violacein Exerts an Immunostimulatory Effect Via TLR8
(2019)
Violacein, an indole-derived, purple-colored natural pigment isolated from Chromobacterium violaceum has shown multiple biological activities. In this work, we studied the effect of violacein in different immune cell lines, ...
Determination of the process variables for adsorption and desorption of phosphate from wastewater by selective ion exchangers on magnetic particles
(2015-08-04)
In this study different process variables were evaluated for the adsorption and desorption of phosphate from wastewater by using selective ion exchangers with magnetic particles modi-fied with layered double hydroxides ...
Synthesis and preliminary determination of antibacterial activity of some 1,3-enynes
(2019)
The synthesis of five 1,3-enynes was performed and its activity against Gram-positive and Gram-negative bacteria was determined.
Synthesis and characterization of Cu(II) containing PMMA co-polymer for optical applications
(2007-04-03)
Homogenous, transparent, greenish blue Cu(II)
containing PMMA co-polymer disks were prepared
through the radical polymerization of the Cu(II) methac rylate, MMA and HMA using AIBN as an initiator. The
dependence of the ...