Publications by authors named "L M Rayo Abella"
Stimulation of histamine H-receptors produces a positive inotropic effect in the human atrium.
Naunyn Schmiedebergs Arch Pharmacol
December 2024
There is a controversy whether histamine H-receptor activation raises or lowers or does not affect contractility in the human heart. Therefore, we studied stimulation of H-receptors in isolated electrically stimulated (one beat per second) human atrial preparations (HAP). For comparison, we measured force of contraction in left atrial preparations (LA) from mice with overexpression of the histamine H-receptor in the heart (H-TG).
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- Endohedral fullerenes are molecules that can encapsulate metal clusters, and this study introduces a new type called fluoride clusterfullerenes (FCFs).
- The researchers successfully synthesized FCFs using various actinides, rare earth metals, and alkaline earth metals without needing extra modifications, revealing that adding a fluorine atom alters the metal-metal bonding significantly.
- Their findings indicate that compounds like ThF@(7)-C and CaScF@(6)-C exhibit unique bonding interactions and promising magnetic properties, showcasing the potential of FCFs in future applications.
Background: Lawsonia intracellularis is the causative agent of Porcine Proliferative Enteropathy (PPE), one of the most prevalent pig enteric diseases worldwide, but with sparse information about early infections in suckling piglets in the epidemiology of PPE. With that aim, this study evaluates the prevalence of L. intracellularis in 3-week-old piglets by analysing ileal digesta content and mucosal scrapings from 383 pigs from 16 farms (aprox.
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- - The study examines how factors like gestational age, birth weight, delivery mode, and gender influence the measurement of blood pH and gas analytes (BPGA) in newborns, particularly healthy preterm and term infants.
- - Results indicate that preterm infants have significantly different BPGA levels compared to term infants, influenced by their delivery mode and gender, particularly in terms of carbon dioxide levels and hemoglobin types.
- - The findings suggest that BPGA measurements could be unreliable due to these perinatal characteristics, highlighting the need for further research to establish reliable reference values for different newborn populations.
Metal-metal bonding is crucial in chemistry for advancing our understanding of the fundamental aspects of chemical bonds. Metal-metal bonds based on alkaline-earth (Ae) elements, especially the heavier Ae elements (Ca, Sr, and Ba), are rarely reported due to their high electropositivity. Herein, we report two heteronuclear di-EMFs CaY@(6)-C and CaY@(5)-C, which contain unprecedented single-electron Ca-Y metal-metal bonds.
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