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Now showing items 31-40 of 52
Insight into the stable isotopic composition of glacial lakes in a tropical alpine ecosystem: Chirripó, Costa Rica
(Wiley & Sons, 2018)
Tropical high‐elevation lakes are considered sentinels of global climate change. This work characterizes the hydrological conditions of tropical alpine glacial lakes located in the highlands of Chirripó, Costa Rica, using ...
Preface to Stable isotopes in hydrological studies in the tropics: ecohydrological perspectives in a changing climate
(Wiley & Sons, 2019)
Tropical regions (comprised between the Tropics of Cancer and Capricorn, 23.5°N to 23.5°S) cover approximately 36% of the Earth's landmass. They are home to 40% of the world's population, which is
projected to increase ...
Tracking the water fingerprints of Cocos Island: A stable isotope analysis of precipitation, surface water, and groundwater
(Revista de Biología Tropical, 2016)
The use of stable isotopes of water, both δ2H and δ18O has provided novel insights in hydrological studies, ecological applications, understanding climate variability, and reconstructing paleoclimate. However, information ...
On the comparison between diafiltration and isothermal titration calorimetry: Determination of the amount of analytes bound to watersoluble polymers
(Elsevier Ltd, 2019)
Aqueous systems composed of low molecular-weight species (LMWS) and water-soluble polymers (WSP) present
important technological applications. Therefore, continuous advances on characterization techniques are crucial
to ...
Moisture transport and seasonal variations in the stable isotopic composition of rainfall in Central American and Andean Páramo during El Niño conditions (2015–2016)
(John Wiley and Sons Ltd, 2019)
High‐elevation tropical grassland systems, called Páramo, provide essential ecosystem services such as water storage and supply for surrounding and lowland areas.
Páramo systems are threatened by climate and land use ...
Potent CYP3A4 Inhibitors Derived from Dillapiol and Sesamol
(American Chemical Society 4, 6, 10915–10920 2019, 2019)
Synthesis of 50 analogues of the natural insecticide synergists, dillapiol and sesamol, is reported. These were
evaluated as potential insecticide synergists based on their inhibition of human CYP3A4. The most potent ...
Drug Solubility Enhancement through the Preparation of Multicomponent Organic Materials: Eutectics of Lovastatin with Carboxylic Acids
(MDPI AG, 2019-03)
Lovastatin (LOV) is a drug used to treat hypercholesterolemia. Recent studies have
identified its antioxidant effects and potential use in the treatment of some types of cancer. However,
the low bioavailability related ...
Estudio bioprospectivo, actividad antibiótica y antioxidante del exocarpio del fruto de santol (Sandoricum koetjape)
(Universidad Nacional de Costa Rica, 2019-01-31)
Con el fin de evaluar las principales propiedades antioxidantes y antibióticas del exocarpio del fruto de Santol (Sandoricum koetjape), se realizó una bioprospección sobre este, así como una ...
Hydrogeological responses in tropical mountainous springs
(Taylor and Francis Ltd., 2019)
This study presents a hydrogeochemical analysis of spring
responses (2013–2017) in the tropical mountainous region of the
Central Valley of Costa Rica. The isotopic distribution of δ18O and
δ2
H in rainfall resulted ...
Emerging contaminants in trans-american waters
(Institute for Environmental Research in Hydrographic Basins (IPABHi), 2019)
BSTRACT
Industrial development has made new products available to people to make their lives
easier. Items such as food, cleaning, personal care and health products, among others, are
processed, sold and consumed daily ...