Results 31 to 40 of about 86,189 (266)
Development and characterization of agglomerated abrasives based on agro-industrial by-products
Journal of Natural Fibers, 2023 The present work deals with the valorization of agro-industrial by-products to realize bonded abrasives. Four by-products were studied because of their wide availability and mechanical properties: palm nuts shells (Elaeis guineensis), Coco Nucifera ...
Narcisse Defo +6 more
doaj +1 more source
International Journal of Geometric Methods in Modern Physics, 2004 We define on-shell symmetries and characterize them for Lagrangian systems. The terms appearing in the variation of the Poincaré–Cartan form, which vanish because of field equations, are found to be strongly constrained if the space of solutions has to be preserved.
Fabitene, L. +2 more
openaire +3 more sources
Shelling pseudopolyhedra [PDF]
Discrete & Computational Geometry, 1992 The intersection \(P\) of a family \(\mathcal H\) of closed half-spaces of Euclidean space is called a pseudopolyhedron if for every \(x\in P\) there is a neighborhood of \(x\) having non-empty intersection with at most finite number of the bounding hyperplanes of the half-spaces from \(\mathcal H\).
openaire +2 more sources
Investigation of Strength and Buckling of Orthotropic Conical Shells and Conical Panels [PDF]
Известия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2020 In the construction, thin-walled shell structures are used to cover the buildings of large areas, such as stadiums, hangars, circuses, airports. In this paper, the strength and buckling of closed conical shells as well as their panels are studied.
Elena Olegovna Lapina +1 more
doaj +1 more source
Influence of Discretely Introduced Cutouts on the Buckling of Shallow Shells with Double Curvature [PDF]
Journal of Applied and Computational MechanicsThe paper analyzes the influence of cutouts on the buckling of shallow shells with double curvature. Based on the Timoshenko-Reissner hypothesis, a mathematical model is presented that considers transverse shifts, material orthotropy, geometric ...
Nikolai Mishurenko, Alexey Semenov
doaj +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Applied Sciences, 2020 Walnut and hazelnut shells are agricultural by-products, available in high quantities during the harvest season. The potential of using these two agricultural residues as raw materials in particleboard production has been evaluated in this study ...
Marius Cătălin Barbu +3 more
doaj +1 more source
Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions
FEBS Letters, EarlyView.The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang +4 more
wiley +1 more source
Structural Mechanics of Engineering Constructions and Buildings, 2021 The theoretical foundations of compatible finite elements construction for static and dynamic analysis of single-layer and multilayer shells are discussed. These finite elements are implemented in the PRINS computer program.
Vladimir P. Agapov, Alexey S. Markovich
doaj +1 more source
Discerning protein pools by selective staining with self‐labeling tags
FEBS Letters, EarlyView.Cell surface proteins have an intra‐ and extracellular pool. Combining genetic fusion to self‐labeling tags that can be addressed with small molecule fluorophores allows separating these pools. We highlight recent developments and techniques for state‐of‐the‐art interrogation of cell surface proteins in the complex tissue setting.
Kati Fischermanns, Johannes Broichhagen
wiley +1 more source