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Thermal fluctuations of lipid orientation are analyzed to infer the bending rigidity of lipid bilayers directly from molecular simulations. Compared to the traditional analysis of thermal membrane undulations, the proposed method is reliable down to shorter wavelengths and allows for determination of the bending rigidity using smaller simulation boxes. The requisite theoretical arguments behind this analysis are presented and verified by simulations spanning a diverse range of lipid models from the literature.
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http://dx.doi.org/10.1103/PhysRevLett.109.028102 | DOI Listing |
Atomic layer deposition (ALD) enables an excellent surface coverage and uniformity in the preparation of large-area metal-oxide thin films. In particular, ALD-processed SnO has demonstrated great potential as an electron transport layer in flexible perovskite solar cells (PSCs) and tandem modules. However, the poor electrical conductivities and surface wettabilities of amorphous SnO remain critical challenges for commercialization.
View Article and Find Full Text PDFUnlabelled: Dual-energy x-ray absorptiometry (DXA)-derived areal bone mineral density (BMD) remains the clinical standard for assessing osteoporosis risk, yet it fails to identify over 75% of individuals who sustain fragility fractures. Direct in vivo mechanical assessment of cortical bone strength may address this diagnostic gap by capturing structural and material properties that govern whole-bone strength but are not reflected by BMD. We conducted a multicenter case-control study with cross-sectional assessment to compare ulna flexural rigidity, a biomechanical property correlated with whole-bone strength (R² ≈ 0.
View Article and Find Full Text PDFACS Nano
September 2025
College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, Suzhou 215006, China.
The confining walls made by 2D materials are often considered solid boundary conditions in studies of fluid transport through nanochannels, while the atomically thin walls inherently exhibit thermal fluctuations at a finite temperature. In this work, we investigate the solid-liquid interfacial friction properties of water confined within flexible nanochannels using machine-learning-potential molecular dynamics. Surprisingly, we find that the friction coefficient (λ) increases with lateral size in the flexible nanochannels, following a linear relationship with 1/, which is absent in rigid channels.
View Article and Find Full Text PDFJ Neurol Surg B Skull Base
October 2025
Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, Massachusetts, United States.
Introduction: Rigid endoscopes have allowed surgeons to safely perform endoscopic sinus surgery. However, their rigid nature creates inherent visualization limitations. The study herein looks to assess the visualization potential of a novel articulating rigid-flexible endoscope when compared with traditional rigid and flexible nasal endoscopes.
View Article and Find Full Text PDFJ Clin Orthop Trauma
November 2025
Department of Orthopaedics, All India Institute of Medical Sciences, Bhubaneshwar, 751019, India.
Severe rigid scoliosis presents formidable surgical challenges, even for the most seasoned spine surgeons. Patients with idiopathic scoliosis frequently exhibit severe manifestations after years of progressive deformity, characterised by pronounced curves, significant rib humps, shoulder and trunk asymmetry, and cardiorespiratory complications associated with untreated scoliosis. In our practice, around one-third of patients with scoliosis present with advanced, severe, rigid scoliosis (>90° and 25 % correction on bending radiographs).
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