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Mostrando ítems 111-120 de 163
Effects of solar ultraviolet radiation on terrestrial ecosystems. Patterns, mechanisms, and interactions with climate change
(Royal Society of Chemistry, 2011-02)
Ultraviolet radiation (UV) is a minor fraction of the solar spectrum reaching the ground surface. In this assessment we summarize the results of previous work on the effects of the UV-B component (280-315 nm) on terrestrial ...
Síntesis de un nanomaterial magnético de plata para aplicaciones ambientalesSynthesis of a silver magnetic nanomaterial for environmental applications
(Universidad Nacional de la Patagonia Austral, 2021-11)
El desarrollo de nuevos sensibilizadores para la degradación fotoquímica de contaminantes ha sido un foco de atención en los últimos años, es por ello que los nanomateriales han tomado una gran relevancia en este campo. ...
Carbamazepine Degradation Mediated by Light in the Presence of Humic Substances-Coated Magnetite Nanoparticles
(MDPI AG, 2019-09)
The use of iron-based nanomaterials for environmental remediation processes has recently received considerable attention. Here, we employed core-shell magnetite-humic acids nanoparticles as a heterogeneous photosensitizer ...
Pterin-photosensitization of thymine under anaerobic conditions in the presence of guanine
(Elsevier Science Inc., 2021-10)
Pterin (Ptr) is a model photosensitizer that acts mainly through type I mechanism and is able to photoinduce the one-electron oxidation of purine and pyrimidine nucleobases. However, under anaerobic conditions Ptr reacts ...
Comparison of the epiphyte Tillandsia bergeri and the XAD-resin based passive air sampler for monitoring airborne pesticides
(Elsevier Science, 2019-09)
The aim of this study was to assess if the epiphyte Tillandsia bergeri is feasible to be used as a biomonitor of pesticides in the air by comparing with the results of the artificial XAD-resin based passive air sampler ...
Assessment of variations in dissolved organic matter in contrasting streams in the Pampas and Patagonian regions (Argentina)
(Csiro Publishing, 2018-09)
Dissolved organic matter (DOM) is the major source of carbon in aquatic environments and may be derived from allochthonous or autochthonous sources. This study presents the first DOM characterisation in streams from two ...
Dual adsorbent-photocatalytic Keratin-TiO 2 photocatalytic nanocomposite for trimethoprim removal from wastewater
(Royal Society of Chemistry, 2020-07)
Trimethoprim is an emerging pollutant that has been found in ground water in alarming concentrations. Thus, the development of economical and efficient advanced water treatment technologies is crucially needed. In this ...
Carbamazepine Degradation Mediated by Light in the Presence of Humic Substances-Coated Magnetite Nanoparticles
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-09-26)
The use of iron-based nanomaterials for environmental remediation processes has recently received considerable attention. Here, we employed core-shell magnetite-humic acids nanoparticles as a heterogeneous photosensitizer ...
Oregano Essential Oil Interactions with Photogenerated Singlet Molecular Oxygen
(Wiley Blackwell Publishing, Inc, 2020-05)
Essential oils are a mixture of volatile compounds, products of the secondary metabolism of plants. Once extracted, they can be deteriorated losing their organoleptic and therapeutic properties due to various environmental ...
Near-Field Enhancement Contribution to the Photoactivity in Magnetite-Gold Hybrid Nanostructures
(American Chemical Society, 2019-12)
Hybrid nanostructures composed of magnetic iron oxides and plasmonic metals can convert light energy into chemical energy, and they can be easily manipulated through magnetic fields. As a consequence of these multifunctional ...