Publications by authors named "J C REDONDO"
Atomic-Scale View at the Segregation of Alkali Metals toward the KTaO(001) Perovskite Surface.
ACS Appl Mater Interfaces
December 2024
Perovskites exhibit outstanding performance in applications such as photocatalysis, electrochemistry, or photovoltaics, yet their practical use is hindered by the instability of these materials under operating conditions, specifically caused by the segregation of alkali cations toward the surface. The problem arises from the bulk strain related to different cation sizes, as well as the inherent electrostatic instability of perovskite surfaces. Here, we focus on atomistic details of the surface-driven process of interlayer switching of alkali atoms at the inorganic perovskite surface.
View Article and Find Full Text PDFIn polarizable materials, electronic charge carriers interact with the surrounding ions, leading to quasiparticle behavior. The resulting polarons play a central role in many materials properties including electrical transport, interaction with light, surface reactivity, and magnetoresistance, and polarons are typically investigated indirectly through these macroscopic characteristics. Here, noncontact atomic force microscopy (nc-AFM) is used to directly image polarons in FeO at the single quasiparticle limit.
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- Equine post-operative complications are a major concern for veterinarians and horse owners, particularly after elective or colic surgeries.
- A systematic review analyzed data from 67 studies and found that the overall prevalence of complications after non-abdominal surgeries is around 17.48%, which jumps to 55.62% following colic surgery.
- The most common issue was post-operative colic, with a prevalence of 7.45% after elective/non-abdominal surgery, increasing to 26.46% after colic procedures.
Extensive genetic studies have elucidated cardiomyocyte differentiation and associated gene networks using single-cell RNA-seq, yet the intricate transcriptional mechanisms governing cardiac conduction system (CCS) development and working cardiomyocyte differentiation remain largely unexplored. Here we show that mice deleted for Dhx36 (encoding the Dhx36 helicase) in the embryonic or neonatal heart develop overt dilated cardiomyopathy, surface ECG alterations related to cardiac impulse propagation, and (in the embryonic heart) a lack of a ventricular conduction system (VCS). Heart snRNA-seq and snATAC-seq reveal the role of Dhx36 in CCS development and in the differentiation of working cardiomyocytes.
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- The study aimed to evaluate how donor oocyte survival rates during vitrification/warming affect both laboratory and clinical results in IVF cycles.
- A total of 12,690 donor oocyte recipient cycles from European IVF units were analyzed, categorizing them based on survival rate ranges: benchmark (95-100%), competence (85-95%), below-competence (70-85%), poor (50-70%), and very poor (<50%).
- Results indicated that lower survival rates correlated with reduced usable blastocyst rates and fertilization rates, while the overall live-birth rates remained similar across groups but decreased for cumulative outcomes as survival rates decreased.