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Multi-Mechanism Collaborative Bionic Fixation Technique Between a Wide Range of Solid Interfaces.
Adv Sci (Weinh)
November 2024
Jiangsu Key Laboratory of Bionic Materials and Equipment, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing, 210016, China.
For rough surfaces, stable, fast, and repeatable fixation has wide applicability in transportation, fire protection, and other fields. Different rough surfaces present technical challenges for achieving convenient and reliable fixation. Based on the highly adhesive attachment structures of typical organisms, a multi-mechanism (negative pressure adsorption, mechanical locking, and chemical bonding) cooperative bionic fixation device is proposed.
View Article and Find Full Text PDFMechanistic insights into the electron attachment process to guanosine in the presence of arginine.
Phys Chem Chem Phys
November 2024
Department of Chemistry, Indian Institute of Technology Guwahati, Assam-781039, India.
The attachment of low-energy electrons (LEEs) to DNA biomolecules leads to irreversible damage. However, the behavior of this interaction can be influenced by the presence of amino acids. Herein, we have delved into the mechanism of electron attachment to the guanosine in the presence of arginine.
View Article and Find Full Text PDFSelected ion flow tube studies of the reactions of HO, NO, O˙ and O˙ ions with alkanes in He and N carrier gases at different temperatures.
Phys Chem Chem Phys
October 2024
J Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23 Prague 8, Czechia.
The kinetics of the reactions of HO, NO, O˙ and O˙ with -hexane, 3-methylpentane, 2,5-dimethylhexane and 2,3-dimethylheptane were studied experimentally under several selected ion flow tube (SIFT) conditions: in a Profile 3 instrument in He and N carrier gases at 300 K and in the Voice200 instrument in N carrier gas at 300 and 393 K - where the effect of the extraction lens voltage was also assessed. It was found that HO ions react differently than expected, with reaction rates slower than collisional. Instead of transferring a proton, they associate and form fragment product ions [M-H].
View Article and Find Full Text PDFInitiation of decohesion between a flat punch and a thin bonded incompressible layer.
Math Mech Solids
October 2024
Institut für Mechanik, Technische Universität Berlin, Berlin, Germany; National Research Tomsk State University, Tomsk, Russia.
Non-axisymmetric frictionless JKR-type adhesive contact between a rigid body and a thin incompressible elastic layer bonded to a rigid base is considered in the framework of the leading-order asymptotic model, which has the form of an overdetermined boundary value problem. Based on the first-order perturbation of the Neumann operator in the Dirichlet problem for Poisson's equation, the decohesion initiation problem is formulated in the form of a variational inequality. The asymptotic model assumes that the contact zone and its boundary contour during the detachment process are unknown.
View Article and Find Full Text PDFMechanism of Rock Mass Detachment Using Undercutting Anchors: A Numerical Finite Element Method (FEM) Analysis.
Materials (Basel)
September 2024
KOMAG Institute of Mining Technology, Pszczyńska 37, 44-100 Gliwice, Poland.
Undercutting anchors are structural elements used in construction and geotechnics to stabilize both structures and soils. Their main applications include stabilizing slopes and embankments, reinforcing foundations, and providing support during tunnel construction and other underground works. The authors propose the use of these anchors in rock mass detachment technology.
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