The chain dynamics of short-chain perfluoropolyether melts confined in Vycor nanoporous media has been characterized by field cycling nuclear magnetic resonance relaxometry and the dipolar correlation effect. The slowdown of motions under confinement, leading to larger residual dipolar couplings, has been probed by looking at the quotient of stimulated and primary echoes. Using field cycling relaxometry, it has been shown that there is strong evidence of reptation-like motion, even for such short-chain polymers as shown by the frequency and molecular weight dependences of the spin-lattice relaxation time.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.mri.2006.11.018 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
LiAlClS: a low-cost and high-performance solid electrolyte for solid-state batteries.
Chem Sci
January 2025
Materials Science and Engineering Program, The Graduate School, Florida State University 2005 Levy Ave. Tallahassee FL 32310 USA
Solid electrolytes (SEs) are crucial for advancing next-generation rechargeable battery technologies, but their commercial viability is partially limited by expensive precursors, unscalable synthesis, or low ionic conductivity. Lithium tetrahaloaluminates offer an economical option but exhibit low Li conductivities with high activation energy barriers. This study reports the synthesis of lithium aluminum chalcohalide (LiAlClS) using inexpensive precursors one-step mechanochemical milling.
View Article and Find Full Text PDFFamily adoption programme implementation feedback from undergraduate medical students in Almora: A cross-sectional study.
J Family Med Prim Care
December 2024
Department of Pharmacology, Soban Singh Jeena Government Institute of Medical Sciences and Research, Almora, Uttarakhand, India.
Background: The Family Adoption Programme (FAP) aims to provide a learning opportunity to Indian medical graduates towards community-based health care. This study describes the perspective of medical undergraduate students towards the FAP implementation at the government medical college in Almora.
Methods: An observational study was conducted on the students of phases I and II in the government medical college, Almora, on the hurdles and facilitators of FAP via Google Form.
[Not Available].
Z Prakt Augenheilkd Augenarztl Fortbild
July 2023
Max-Planck-Institut für biologische Kybernetik, Tübingen.
In addition to the rods and cones, the melanopsin-containing intrinsically photosensitive retinal ganglion cells (ipRGC) are responsible for encoding ambient illumination conditions. The main task of the ipRGC is to signal information about illumination to the brain. Via the retinohypothalamic pathway, light synchronises our internal biological clock and sets it to follow the environment's light-dark cycle.
View Article and Find Full Text PDFStudy on Highly Sensitive Capacitive Pressure Sensor Based on Silk Fibroin-Lignin Nanoparticles Hydrogel.
Biomacromolecules
January 2025
Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China.
Silk fibroin (SF) hydrogel has been proven to have excellent applications in the field of pressure sensors, but its sensing performance still needs improvement. A flexible hydrogel prepared from natural macromolecular materials was developed, and lignin nanoparticles (LNPs) were introduced during the preparation of the SF hydrogel. When LNPs account for 3% of SF, the sensing unit of the SF-LNPs hydrogel exhibits high stress sensitivity (1.
View Article and Find Full Text PDFEvaluating Xanthomonas oryzae pv. oryzae (Xoo) infection dynamics in rice for distribution routes and environmental reservoirs by molecular approaches.
Sci Rep
January 2025
Department of Biology, Faculty of Science, Naresuan University, Phitsanulok, Thailand.
Xanthomonas oryzae pv. oryzae (Xoo) is a bacterial pathogen responsible for bacterial leaf blight (BLB) in rice, which can result in significant yield losses of up to 70%. A study evaluated the spread of Xoo in rice fields using environmental samples and employed colorimetric loop-mediated amplification (cLAMP) and PCR for detection.
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!