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Tailored Nucleation-Growth Strategy for Precise Self-assembly of Block Copolymers.
Chemistry
January 2025
Beijing Institute of Technology, Polymer Materials, 5 Zhongguancun Nandajie, 100081, Beijing, CHINA.
The self-assembly of block copolymers (BCPs) to form nanostructures of various morphologies and controllable dimensions has been a very promising research area in nanotechnology in recent decades. This review mainly summarizes the recent advances in precise and controllable self-assembly of BCPs through a tailored nucleation-growth strategy to modulate the self-assembly behavior of the BCPs. These efforts have led to a better understanding of the self-assembly mechanisms and opened new possibilities for creating novel materials with designable properties.
View Article and Find Full Text PDFAcute Nonsustained Mitral Isthmus Block Obtained With Sphere-9 Lattice-Tip Catheter Completed With Vein of Marshall Ethanol Infusion.
J Cardiovasc Electrophysiol
January 2025
Hôpital Cardiologique du Haut Léveque, CHU de Bordeaux, L'Institut de RYthmologie et modelisation Cardiaque (LIRYC), Université de Bordeaux, Bordeaux, France.
Background: Achieving a durable mitral line block using radiofrequency as a part of an anatomical approach for ablation in patients with persistent atrial fibrillation or for treating peri-mitral flutter has always been challenging due to the complex anatomy of the mitral isthmus. Epicardial ablation via the coronary sinus and the vein of Marshall has been proposed to help create durable lesions. Recently, a novel lattice-tip catheter using pulsed field ablation has shown promising results for creating mitral lines, despite limited data.
View Article and Find Full Text PDFMatrix vesicle-inspired delivery system based on nanofibrous chitosan microspheres for enhanced bone regeneration.
Mater Today Bio
February 2025
State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, 430079, China.
Inspired by the initial mineralization process with bone matrix vesicles (MVs), this study innovatively developed a delivery system to mediate mineralization during bone regeneration. The system comprises nanofibrous chitosan microspheres (NCM) and poly (allylamine hydrochloride)-stabilized amorphous calcium phosphate (PAH-ACP), which is thereafter referred to as NCMP. NCM is synthesized through the thermal induction of chitosan molecular chains, serving as the carrier, while PAH-ACP functions as the mineralization precursor.
View Article and Find Full Text PDFObservations of Score Changes Between USMLE Step 1 and Step 2 Among Students of Different Demographic Groups in a Longitudinal Clinical Curriculum.
J Med Educ Curric Dev
January 2025
Kirk Kerkorian School of Medicine at UNLV, Las Vegas, NV, USA.
Background: The transition of the United States Medical Licensing Examination Step 1 to a pass/fail scoring system is reshaping its role in medical students' residency placements. This compels institutions to rethink Step 2 preparation strategies, raising concerns about a clerkship's impact on various student groups. Traditionally, medical schools followed the traditional block rotation model for clerkships, which limits longitudinal learning, and many schools are switching to longitudinal integrated clerkships and longitudinal interleaved clerkships (LInCs).
View Article and Find Full Text PDFRhodamine-Gold Hybrid Nanosensor for Rapid and Selective Detection of Hg2+ Ions in Environmental Samples.
Chem Asian J
January 2025
Chulalongkorn University, Chemistry, THAILAND.
This research focuses on the selective detection of Hg2+ ions using hybrid nanosensors composed of rhodamine building blocks linked to polyamine units of varying chain lengths to produce Rho1-Rho4, which were subsequently conjugated with thioctic acid (RT1-RT4) and attached to the surface of gold nanoparticles to create hybrid nanosensors (GRT1-GRT4) designed for detecting heavy metals. The chemical structures, purity, morphology, and chemical composition were characterized through XRD, NMR, TEM, ATR-FTIR, and mass spectrometry. These hybrid nanosensors demonstrated excellent selectivity and sensitivity in colorimetric and fluorescence responses towards Hg2+, outperforming other metal ions.
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