Publications by authors named "Juan D Jimenez"
Numerous cases of myocarditis related to mRNA vaccines for COVID-19 have recently been described, usually in young men. Long-term evolutive cardiac magnetic resonance imaging (CMR) data are lacking. We describe four consecutive cases of COVID-19 vaccine-induced myocarditis.
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- Researchers developed monometallic Pd-CeO catalysts, enhanced with carbon, that achieve 100% selectivity for converting methane to methanol at 75 °C, using hydrogen peroxide as an oxidizer.
- The catalysts were created through a simple mechanochemical method that produces a unique interface (Pd-iC-CeO), which optimizes the interaction between metal and oxide components for better performance.
- A DFT-simulated Eley-Rideal-like mechanism showed that solvent interactions, specifically with water (HO (aq)), are crucial for maintaining methanol selectivity in the solid-liquid-gas conversion process.
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- The study examines the methane dry reforming (DRM) reaction using a new type of catalyst, PdAcCeOM, which has a unique interface between palladium (Pd) and cerium oxide (CeO) that enhances its effectiveness compared to traditional methods.
- In-depth analysis showed that the unique surface arrangement of Pd and Ce in PdAcCeOM allows for more efficient reactions, primarily due to strong interactions between Pd and CeO and the formation of specific carbons on these surfaces.
- The findings highlight that the new catalyst facilitates a preferred reaction pathway for converting methane to carbon monoxide, while traditional catalysts are hindered by competing reactions like the reverse water gas shift.
Raman spectroscopy was used to establish direct evidence of heterometallic metal centers in a metal-organic framework (MOF). The Cu(BTC) MOF HKUST-1 (BTC = benzenetricarboxylate) was transmetalated by heating it in a solution of RhCl to substitute Rh ions for Cu ions in the dinuclear paddlewheel nodes of the framework. In addition to the Cu-Cu and Rh-Rh stretching modes, Raman spectra of (CuRh)(BTC) show the Cu-Rh stretching mode, indicating that mixed-metal Cu-Rh nodes are formed after transmetalation.
View Article and Find Full Text PDFHigh throughput experimentation has the capability to generate massive, multidimensional datasets, allowing for the discovery of novel catalytic materials. Here, we show the synthesis and catalytic screening of over 100 unique Ru-Metal-K based bimetallic catalysts for low temperature ammonia decomposition, with a Ru loading between 1-3 wt% Ru and a fixed K loading of 12 wt% K, supported on γ-AlO. Bimetallic catalysts containing Sc, Sr, Hf, Y, Mg, Zr, Ta, or Ca in addition to Ru were found to have excellent ammonia decomposition activity when compared to state-of-the-art catalysts in literature.
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- The study aimed to assess how heart rate at admission, discharge, and the difference between the two affects long-term outcomes in acute heart failure patients with either sinus rhythm or atrial fibrillation.
- It included 1398 patients and found that only the heart rate at discharge was linked to one-year mortality, with higher rates indicating a greater risk for both sinus rhythm and atrial fibrillation patients.
- The conclusions suggest that a lower discharge heart rate is associated with better long-term outcomes in these patients, while admission heart rate and the difference didn't show significant prognostic impact.
Olfactory learning and floral scents are co-adaptive traits in the plant-pollinator relationship. However, how scent relates to cognition and learning in the diverse group of Neotropical stingless bees is largely unknown. Here we evaluated the ability of to be conditioned to scent using the proboscis extension reflex (PER) protocol.
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