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Assessing soil water repellency of a sandy field with visible near infrared spectroscopy
(Scopus, 2015)Soil water repellency (WR) is a widespread phenomenon caused by aggregated organic matter (OM) and layers of hydrophobic organic substances coating the surface of soil particles. These substances have a very low surface ... -
Comparative study of the optical behavior of a porphyrin encapsulated in sol-gel silica coatings and in solution as a function of pH
(Elsevier, 2016)We report a comparative optical spectral study as a function of pH on a porphyrin encapsulated in a solgel matrix and in methanol solution. Its response has been discussed in terms of pH-sensitivity as a function of the ... -
Effect of pretreatment temperature on the surface modification of diatomite with trimethylchlorosilane
(Journal of Porous Materials, 2016)Diatomite samples from Costa Rica were purified using acidic treatments with hydrochloric acid, thermally treated (400–1000 C) and then silylated with trimethylchlorosilane in toluene under inert atmosphere. The ... -
Inventarios de gases de efecto invernadero de las escuelas primarias de Belén, Heredia, Costa Rica Greenhouse gases produced by primary schools in Belén, Heredia, Costa Rica
(Cuadernos de Investigación UNED, 2015)There is no published information on greenhouse gas emision in public schools of Costa Rica. Using as reference the national voluntary standard INTE / ISO 12-01-06: 2011 I measured emissions in three primary schools: ... -
Not-from-concentrate pilot plant ‘Wonderful’ cultivar pomegranate juice changes: Volatiles
(Elsevier, 2017)Pilot plant ultrafiltration was used to mimic the dominant U.S. commercial pomegranate juice extraction method (hydraulic pressing whole fruit), to deliver a not-from-concentrate (NFC) juice that was high-temperature ... -
Site-specific cleavage of ribosomal RNA in Escherichia coli-based cell-free protein synthesis systems
(PLoS ONE, 2016)Cell-free protein synthesis, which mimics the biological protein production system, allows rapid expression of proteins without the need to maintain a viable cell. Nevertheless, cellfree protein expression relies on ... -
Synthesis, properties, and two-dimensional adsorption characteristics of 5-amino[6]hexahelicene
(Willy, 2016)A convergent synthesis of racemic 5-amino[6]hexahelicene is described. Cross-coupling reactions are used to assemble a pentacyclic framework, and a metal-catalyzed ring-closure comprises the final step. The enantiomers ... -
The release of wastewater contaminants in the Arctic: A case study from Cambridge Bay, Nunavut, Canada
(Scopus, 2016)The treatment of municipal wastewater in the Arctic is challenging due to a variety of financial, operational, climatic and technical issues. To better understand the efficacy of current wastewater treatment in this ... -
Towards a fuzzy logic model for chemical risk assessment by inhalation in laboratories
(Proceedings of the 2015 IEEE 35th Central American and Panama Convention, CONCAPAN 2015, 2015)This paper presents a computational Fuzzy Logic Model for chemical hazards risk assessment by inhalation in laboratories. Some influence factors on chemical risk are deterministic but not completely measurable. As a ... -
Tracking dipeptides at work-uptake and intracellular fate in CHO culture
(AMB Express, 2016)Market demands for monoclonal antibodies (mAbs) are steadily increasing worldwide. As a result, production processes using Chinese hamster ovary cells (CHO) are in the focus of ongoing intensification studies for maximizing ...