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111.
Niklas Dieckmann Dmitry Puzyrev Torsten Trittel Ralf Stannarius 《Annalen der Physik》2024,536(3):2300349
The mechanical excitation of solid bodies by a vibrating plate is not only an interesting fundamental problem, but also has relevance in many mechanical systems, for example, in the preparation of granular gases in microgravity. Herein, the energy input by an oscillating plate is numerically investigated as a function of the excitation parameters for selected Platonic solids and their behavior compared to that of a jumping sphere. The most important additional features, not relevant for spheres, are the excitation of body rotations and a permanent energy exchange between the rotational and translational degrees of freedom during the collisions with the plate. The distribution of kinetic energies is analyzed by a numerical simulation of the dynamics, using structures which emulate the mechanical behavior of regular polyhedra. 相似文献
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Franziska Debatin Arne Thomas Prof. Dr. Alexandra Kelling Niklas Hedin Dr. Zoltan Bacsik Dr. Irena Senkovska Dr. Stefan Kaskel Prof. Dr. Matthias Junginger Holger Müller Uwe Schilde Prof. Dr. Christian Jäger Prof. Dr. Alwin Friedrich Dr. Hans‐Jürgen Holdt Prof. Dr. 《Angewandte Chemie (International ed. in English)》2010,49(7):1258-1262
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The peptide-zinc complex [(Dpg-Phe)Zn]2+ (Dpg = N,N-dipicolylglycine; Phe = phenylalanine) reversibly forms a homochiral P-helical coordination polymer upon switching the pH from mildly basic to mildly acidic. 相似文献
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Borrett VT Gan TH Lakeland BR Leslie DR Mathews RJ Mattsson ER Riddell S Tantaro V 《Journal of chromatography. A》2003,1003(1-2):143-155
Amiton [O,O-diethyl S-[2-(diethylamino)ethyl] phosphorothiolate], is an organophosphorus chemical included in Schedule 2 of the Chemical Weapons Convention (CWC). Verification provisions under the CWC rely on the existence of a database of analytical information for scheduled chemicals and related compounds. Little analytical information is available for amiton. In this study, gas chromatography-mass spectrometry (GC-MS) characterisation of amiton and its typical impurities (including by-products and degradation products), supported by selective GC detection and 31P NMR data, was undertaken. Twenty-one compounds, including a by-product unique to amiton from an industrial source, were identified. Involatile degradation products of amiton were derivatised to enable their identification by GC-MS. The recovery of amiton from matrices that may be expected in an inspection scenario (i.e. concrete, paint, rubber and soil) was also examined. Paint and concrete matrices were the most useful matrices for the detection of amiton, and its by-products and degradation products. Amiton was readily detected in these matrices after 28 days. 相似文献
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