Nanomaterials Toward CO Reduction and Conversion.

The increasing concentration of CO in the atmosphere is one of the main factors contributing to global climate change [...

Impact of the Precursor on the Physicochemical Properties and Photoactivity of TiO Nanoparticles Produced in Supercritical CO.

The synthesis of TiO nanoparticles (NPs) in supercritical media has been reported over the last two decades. However, very few studies have compared the physicochemical characteristics and photoactivity of the TiO powders produced from different precursors, and even fewer have investigated the effect of using different ratios of hydrolytic agent/precursor (HA/P) on the properties of the semiconductor. To bridge this knowledge gap, this research focuses on the synthesis and characterization of TiO NPs obtained in a supercritical CO medium from four different TiO precursors, namely diisopropoxytitanium bis (acetylacetonate) (TDB), titanium (IV) isopropoxide (TIP), titanium (IV) butoxide (TBO), and titanium (IV) 2-ethylhexyloxide (TEO).

PLK1 regulates CtIP and DNA2 interplay in long-range DNA end resection.

DNA double-strand break (DSB) repair is initiated by DNA end resection. CtIP acts in short-range resection to stimulate MRE11-RAD50-NBS1 (MRN) to endonucleolytically cleave 5'-terminated DNA to bypass protein blocks. CtIP also promotes the DNA2 helicase-nuclease to accelerate long-range resection downstream from MRN.

Photocatalytic Reduction of CO with N-Doped TiO-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis.

The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO nanoparticles. Thus, N-doped TiO and two types of composites, N-doped TiO/CNT and N-doped TiO/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively.

A Methodological Framework for Assessing the Sustainability of Solid Biofuels Systems.

Unlabelled: This paper introduces a methodological framework for assessing the sustainability of solid biofuels in Mexico. The designed framework comprises 13 normalized indicators and two diagnostic studies, covering the economic, social, environmental, and institutional sustainability dimensions, and their intersections. Indicators are normalized using the concept of load capacity of a system, similarly to the planetary boundaries.