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Mostrando ítems 61-70 de 94
Polifenoides de Uncaria Tormentosa y propiedades fitoterapéuticas de uña de gato costarricense
(2012-12-18)
Esta invención se refiere a extractos fenólicos conteniendo procianidinas, propelargonidinas y flavanolignanos, con propiedades/actividades potencialmente beneficiosas para la salud humana, y obtenidos a partir de las ...
The putative phosphate transporter PitB (PP1373) is involved in tellurite uptake in Pseudomonas putida KT2440
(2020)
Tellurium oxyanions are chemical species of great toxicity and their presence in the environment has increased because of mining industries and photovoltaic and electronic waste. Recovery strategies for this metalloid that ...
Derivados del 9,10-Dihidrofenantreno
(1970)
La siguiente tesis de licenciatura muestra un estudio de los productos sintéticos obtenidos por la condensación aldólica Schmidt - Claisen de la acetona con la fenantrenoquinona por medios espectroscópicos.
Field trip to Costa Rica: The search for cobalt!
(2016-06-27)
Este blog describe las actividades académicas de los integrantes del Geomicro Group de la University of Manchester, Reino Unido, liderado por el Prof. Jonathan Lloyd.
Esta publicación en particular, fue escrita por Agustín ...
Síntesis de nuevas Dibenzo[f,h]cinolinas
Synthesis of New Dibenzo[f,h]cinnolines
(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 ...
Surface area of ferrihydrite consistently related to primary surface charge, ion pair formation, and specific ion adsorption
(2020-01-20)
The specific surface area (SSA) of metal oxides is pivotal for scaling of surface phenomena. For ferrihydrite (Fh), the SSA can be assessed by probing the surface with ions that specifically adsorb (e.g. protons or phosphate). ...
Derivados del 3,4-Dihidro-isoazol
(1978)
Synthesis and structure elucidation of the products (3a-e) of condensation of phenanthrenequinone with various ketones in presence of ammonia.
High and low affinity sites of ferrihydrite for metal ion adsorption: Data and modeling of the alkaline-earth ions Be, Mg, Ca, Sr, Ba, and Ra
(2020-10-01)
The alkaline-earth metal ion series comprises Be, Mg, Ca, Sr, Ba, and Ra. Calcium (Ca) and magnesium (Mg) are the most abundant alkaline-earth metal ions in nature and their interaction with the mineral surfaces of metal ...
Residuos, degradación y comportamiento de la ametrina en un vertisol de Guanacaste. Costa Rica
(1978)
Residues of the herbicide Ametrine (2-ethylamine-4-isopropylamine-6-methylthio-s-atrazine) were determined by UV-spectrometrical analysis in a soil (vertisol) of Guanacaste, Costa Rica, which has been treated with this ...