Buscar
Mostrando ítems 41-50 de 77
Photochemical Behavior of Some Estrone Aryl and Methyl Sulfonates in Solution: Preparative and Mechanistic Studies
(Wiley Blackwell Publishing, Inc, 2021-01)
Direct irradiation of estrone aryl and methyl sulfonates in different organic solvents under nitrogen atmosphere was investigated under steady-state conditions. The estrone derivatives reacted efficiently through the ...
Environmental and biological factors controlling the spring phytoplankton bloom at the Patagonian shelf-break front - Degraded fucoxanthin pigments and the importance of microzooplankton grazing
(Pergamon-Elsevier Science Ltd, 2016-08)
The aim of this study was to investigate the biotic and abiotic factors controlling the spring phytoplankton blooms at the Patagonian shelf-break front (PSBF). Using a CHEMTAX analysis of HPLC pigment data and other methods, ...
Patterns of CO2 concentration and inorganic carbon limitation of phytoplankton biomass in agriculturally eutrophic lakes
(Pergamon-Elsevier Science Ltd, 2021-02)
Lake eutrophication is a pervasive problem globally, particularly serious in agricultural and densely populated areas. Whenever nutrients nitrogen and phosphorus do not limit phytoplankton growth directly, high growth rates ...
Modulation of the electron transfer processes in Au-ZnO nanostructures
(Royal Society of Chemistry, 2015-03-12)
Plasmonic nanostructures comprising Au and ZnO nanoparticles synthesized by the spontaneous reduction of HAuCl4 in ethylene glycol were used to assess the possibility of modulating the direction of the electron transfer ...
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 ...
Photoactivatable Adhesive Ligands for Light-Guided Neuronal Growth
(Wiley VCH Verlag, 2018-06-06)
Neuro-regeneration after trauma requires growth and reconnection of neurons to reestablish information flow in particular directions across the damaged tissue. To support this process, biomaterials for nerve tissue ...
Total and inorganic mercury determination in biodiesel by emulsion sample introduction and FI-CV-AFS after multivariate optimization
(Royal Society of Chemistry, 2009-06)
An automated procedure for total and inorganic mercury determination in biodiesel by CV-AFS was studied. The samples were introduced directly as oil-in-water emulsions in a flow injection manifold followed by cold vapor ...
Visible-light-driven methane formation from CO2 with a molecular iron catalyst
(Nature Publishing Group, 2017-08)
Converting CO2 into fuel or chemical feedstock compounds could in principle reduce fossil fuel consumption and climate-changing CO2 emissions. One strategy aims for electrochemical conversions powered by electricity from ...
Photoisomerization of Azobenzenes and Spirocompounds in Nematic and in Twisted Nematic Liquid Crystals
(American Chemical Society, 2006-07)
Samples of a nematic mixture of ZLI1132 and of a twisted nematic mixture composed of ZLI1132 and chiral inductor S811, including 1%-10% (w/w) 4-N,N-dimethylaminoazobenzene (DAB), (4′-nitro)-4-N,Ndimethylaminoazobenzene ...
Highly c -Axis Oriented ZnO Thin Films on Glass Substrate by Pulsed Laser Deposition: Fluence-Dependent Effects
(American Scientific Publishers, 2019-10)
Highly c-axis oriented crystalline ZnO thin films were deposited onto glass substrates by the pulsedlaser deposition technique employing a Nd:YAG laser via its second harmonic, and different fluence(0.4 3.2 J/cm2) focused ...