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Benchtop Nuclear Magnetic Resonance (BNMR) technology has gained increasing attention in chemical and pharmaceutical applications due to its compact configuration and operational flexibility. However, the implementation of conventional commercial gradient amplifiers in BNMR systems remains challenging because of their excessive power consumption and bulky dimensions. To address these limitations, this study presents a novel gradient amplifier design optimized for BNMR applications, characterized by a satisfactory linearity in 0-2.5A output current range (slope: 0.9205, offset: 0.0359 and determination coefficient: 0.9963) and achieving a rise time of 1.41μs across dynamic output conditions (60 %, 80 %, 100 % amplitude range). Experimental validation confirms that these technical improvements satisfy the critical requirements for practical BNMR implementations.
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http://dx.doi.org/10.1016/j.medengphy.2025.104395 | DOI Listing |
Chem Commun (Camb)
September 2025
Guangdong Provincial Key Laboratory of New Energy Materials Service Safety, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China.
Thermocells (TECs) represent a promising technology for sustainable low-grade waste heat (<100 °C) harvesting, offering distinct advantages such as scalability, structural versatility, and high thermopower. However, their practical applications are still hindered by low energy conversion efficiency and stability issues. In recent studies, electrolyte engineering has been highlighted as a critical strategy to enhance their thermopower by regulating the solvation structure and redox ion concentration gradient, thereby improving conversion efficiency.
View Article and Find Full Text PDFJ Chem Phys
September 2025
Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, India.
We introduce a novel method using a kilohertz (kHz) amplified 800 nm laser for the first experimental confinement of microparticles within a single beam. This study demonstrates that high-energy kHz pulses can confine 1-μm-radius polystyrene beads in water within ∼26 μm. This approach utilizes the unique properties of high-energy pulsed lasers, distinct from continuous-wave and megahertz pulsed lasers traditionally used in optical trapping.
View Article and Find Full Text PDFLimited evidence exists on the relationship between dietary niacin intake and Life's Essential 8 (LE8), a new metric for cardiovascular health. We analyzed data from 23,729 adults aged ≥ 20 years from the 2005-2018 National Health and Nutrition Examination Survey (NHANES). The LE8 score (range: 0-100) reflects health behaviors, health factors, and biomarkers.
View Article and Find Full Text PDFSci Adv
September 2025
Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, Belgium.
Calcium is a critical regulator of skin adhesion, stabilizing one of the strongest noncovalent biomolecular interactions ever recorded. Using in vitro and in silico single-molecule force spectroscopy, we demonstrate that calcium ions (Ca) are essential for the ultrastrong binding between the serine-aspartate repeat protein D (SdrD) adhesin and the human skin protein desmoglein-1 (DSG-1), withstanding forces exceeding 2 nanonewtons. Ca ions stabilize both the SdrD complex and the mechanically robust SdrD B-domains, which exhibit unprecedented folding strength.
View Article and Find Full Text PDFMater Horiz
September 2025
Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, China.
Ambient humidity is an abundant yet underexploited energy reservoir, and its sustained conversion mechanisms remain elusive. This study employs single-layer, bilayer and ion-selective designs, in combination with Kelvin-probe force microscopy and molecular dynamics simulations, to delineate the fundamental physics of hydrogel-based moisture-enabled generators (MEGs). We demonstrate that continuous, directional water flux-rather than ion migration-governs electricity generation: the transport of 1 g of HO through the hydrogel network yields ≈9.
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