Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Ulcer in a Bulbar Diverticulum: An Atypical Localization and Rare Complication of Gastrointestinal Hemorrhage.
Cureus
November 2024
Gastroenterology, Groupe Hospitalier de la Haute Saone, Vesoul, FRA.
Gastrointestinal bleeding remains a frequent reason for emergency consultations, with a mortality rate that is still worrying despite advances in treatment. The most common cause is gastro-duodenal ulcers, mainly linked to Helicobacter pylori. Unusual causes such as gastroduodenal diverticular haemorrhage, a rare and serious complication, can also be detected during endoscopy.
View Article and Find Full Text PDFAssembly of Pyrenes through a Quadruple Photochemical Cascade: Blocking Groups Allow Diversion from the Double Mallory Path to Photocyclization at the Bay Region.
J Am Chem Soc
December 2024
Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States.
We present a six-step cascade that converts 1,3-distyrylbenzenes (-stilbenes) into nonsymmetric pyrenes in 40-60% yields. This sequence merges photochemical steps, ,-alkene isomerization, a 6π photochemical electrocyclization (Mallory photocyclization); the new bay region cyclization, with two radical iodine-mediated aromatization steps; and an optional aryl migration. This work illustrates how the inherent challenges of engineering excited state reactivity can be addressed by logical design.
View Article and Find Full Text PDFObtaining super-resolved images at the mesoscale through super-resolution radial fluctuations.
J Biomed Opt
December 2024
University of Strathclyde, Strathclyde Institute of Pharmacy and Biomedical Sciences, Glasgow, United Kingdom.
Significance: Current super-resolution imaging techniques allow for a greater understanding of cellular structures; however, they are often complex or only have the ability to image a few cells at once. This small field of view (FOV) may not represent the behavior across the entire sample, and manual selection of regions of interest (ROIs) may introduce bias. It is possible to stitch and tile many small ROIs; however, this can result in artifacts across an image.
View Article and Find Full Text PDFThe simple morphology of the sunfish heart.
J Anat
December 2024
Comparative Medicine Lab, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
The evolutionary conservation of the building plan of the heart suggests this organ is under substantial form-function constraints. Its form varies to such a degree, however, that it questions whether we understand the form-function relations of the heart. A previously published image of the heart of the sunfish (Mola mola, Tetraodontiformes) indicates the presence of an exceptionally simple topology of the chambers.
View Article and Find Full Text PDFIncreased sampling reveals the complex evolution of sauropod dinosaur tooth replacement rates.
J Anat
December 2024
Museum of Paleontology and Department of Earth & Environmental Sciences, University of Michigan, Ann Arbor, Michigan, USA.
Unlike most herbivores, sauropod dinosaurs evolved simple teeth that were replaced rapidly. Sauropod craniodental morphology is conserved relative to that of many archosaur clades, but tooth breadth and replacement rate vary substantially. Two neosauropod clades, Titanosauria and Diplodocoidea, independently evolved both narrow-crowned teeth and high tooth replacement rates among a suite of other convergent features.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!