In this study, the extreme tension wave front profile (pull speed up to 1.6 km/s) in pure aluminum (density 2.7 ) is analyzed using the LAMMPS molecular dynamics (MD) code and based on the tension conservation equations of mass, momentum, and energy. The simulation results agree favorably with the theoretical calculation. The profile of the extreme tension wave front is observed from the MD code simulation, and a typical shockless ramp wave front formation is identified during forced extreme tension loading. Further analysis was accomplished based on the formation of the ramp wave front, illustrating the behavior of the isentrope of aluminum under extreme tension loading.
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http://dx.doi.org/10.1007/s10853-023-08244-6 | DOI Listing |
Soft Matter
January 2025
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia.
are famous for their ability to survive in extremely harsh environments, probably due to the unprecedented stability of their lipid membranes. Key features of archaeal lipids (bolalipids) that confer their stability are methyl side groups and cyclopentanes in the alkyl chains, as well as the specific shape of the molecule, which has two headgroups connected by two tails. However, the contribution of each structural parameter to membrane stability and the underlying physical mechanism remain unknown.
View Article and Find Full Text PDFUnfallchirurgie (Heidelb)
January 2025
Klinik für Orthopädie und Unfallchirurgie, MUM - Muskuloskelettales Universitätszentrum München, LMU Klinik, Marchioninistraße 15, 81377, München, Deutschland.
In the field of tension between generalists and specialists, in modern university trauma and orthopedic surgery the question arises as to which expertise has the greatest importance for the future of clinical care. University medicine consists of three large pillars: Research, teaching and treatment of patients. Each of these pillars is faced with the challenge of increasing specialization; however, generalists are extremely important for the future of university trauma surgery and orthopedics.
View Article and Find Full Text PDFNat Commun
January 2025
Center for Physics and Chemistry of Living Systems, Tel Aviv University, Tel Aviv, Israel.
Propagation of membrane tension mediates mechanical signal transduction along surfaces of live cells and sets the time scale of mechanical equilibration of cell membranes. Recent studies in several cell types and under different conditions revealed a strikingly wide variation range of the tension propagation speeds including extremely low ones. The latter suggests a possibility of long-living inhomogeneities of membrane tension crucially affecting mechano-sensitive membrane processes.
View Article and Find Full Text PDFWorld Neurosurg
December 2024
Department of Neurosurgery, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fu Jian, China. Electronic address:
Objective: This study aims to elucidate the anatomical principles governing the surrounding venous structures (VS) of the horizontal part of the third segment of the vertebral artery (V3h) and develop a safe and bloodless surgical technique for exposing V3h.
Methods: This study used ten formalin-infused cadaveric head specimens. The dissections were performed stepwise to simulate the far lateral approach process, exposing the V3h with a novel technique.
Chem Phys Lipids
December 2024
Biochemistry and Molecular Biology Department, Faculty of Biology, Complutense University, Madrid, Spain; Research Institute Hospital 12 de Octubre (imas12), Madrid, Spain.
Pulmonary surfactant is a membranous complex that enables breathing dynamics at the respiratory surface. Extremely low values of surface tension are achieved at end-expiration thanks to a unique mixture of lipids and proteins. In particular, the hydrophobic surfactant proteins, specially the protein SP-B, are crucial for surfactant biophysical function, in order to provide the surfactant lipid matrix with the ability to form membranous multi-layered interfacial films that sustain optimal mechanical properties.
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