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981.
982.
Henrik L. Selberg 《Commentarii Mathematici Helvetici》1945,18(1):309-326
Ohne Zusammenfassung 相似文献
983.
Henrik L. Selberg 《Commentarii Mathematici Helvetici》1936,9(1):104-108
Ohne Zusammenfassung 相似文献
984.
985.
Robin Bolliger Dr. Angelo Frei Dr. Henrik Braband Giuseppe Meola Prof. Bernhard Spingler Prof. Roger Alberto 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(29):7101-7104
The formation of di- or polynuclear complexes at nanomolar concentrations is generally too slow to be observed with 99mTc. It is reported in this communication that an appropriate choice of potentially bridging ligands, herein thiols HS-R, accelerates the dimerization reaction to an extent that dinuclear complexes are formed at very high dilution. The dinuclear nature of [99mTc2(μ2-SR)3(CO)6]− is shown by chromatographic comparison, not only with its rhenium homologue as commonly done, but also with the true 99Tc analogue. 相似文献
986.
Potential Analysis - The main purpose of the present paper is to establish a link between quadrature surfaces (potential theoretic concept) and sandpile dynamics (Laplacian growth models). For this... 相似文献
987.
988.
Hans Henrik Rugh 《Communications in Mathematical Physics》1999,200(2):487-494
We study the classical Hamiltonian dynamics of the Kogut–Susskind model for lattice gauge theories on a finite box in a d-dimensional integer lattice. The coupling constant for the plaquette interaction is denoted λ2. When the gauge group is a real or a complex subgroup of a unitary matrix group U(N), N≥ 1, we show that the maximal Lyapunov exponent is bounded by , uniformly in the size of the lattice, the energy of the system as well as the order, N, of the gauge group.
Received: 20 December 1997 / Accepted: 21 July 1998 相似文献
989.
Vlad Radoi Gerd Jakobsson Vinko Palada Andrej Nikosjkov Henrik Druid Lars Terenius Eva Kosek Vladana Vukojevi 《Molecules (Basel, Switzerland)》2022,27(7)
The importance of the dynamic interplay between the opioid and the serotonin neuromodulatory systems in chronic pain is well recognized. In this study, we investigated whether these two signalling pathways can be integrated at the single-cell level via direct interactions between the mu-opioid (MOP) and the serotonin 1A (5-HT1A) receptors. Using fluorescence cross-correlation spectroscopy (FCCS), a quantitative method with single-molecule sensitivity, we characterized in live cells MOP and 5-HT1A interactions and the effects of prolonged (18 h) exposure to selected non-peptide opioids: morphine, codeine, oxycodone and fentanyl, on the extent of these interactions. The results indicate that in the plasma membrane, MOP and 5-HT1A receptors form heterodimers that are characterized with an apparent dissociation constant = (440 ± 70) nM). Prolonged exposure to all non-peptide opioids tested facilitated MOP and 5-HT1A heterodimerization and stabilized the heterodimer complexes, albeit to a different extent: = (80 ± 70) nM), = (200 ± 70) nM, = (100 ± 70) nM and = (200 ± 70) nM. The non-peptide opioids differed also in the extent to which they affected the mitogen-activated protein kinases (MAPKs) p38 and the extracellular signal-regulated kinase (Erk1/2), with morphine, codeine and fentanyl activating both pathways, whereas oxycodone activated p38 but not ERK1/2. Acute stimulation with different non-peptide opioids differently affected the intracellular Ca2+ levels and signalling dynamics. Hypothetically, targeting MOP–5-HT1A heterodimer formation could become a new strategy to counteract opioid induced hyperalgesia and help to preserve the analgesic effects of opioids in chronic pain. 相似文献
990.
Effect of polymer-plasticizer interactions on the oxygen permeability of starch-sorbitol-water films
S. Gaudin D. Lourdin D. Le Botlan J. L. Ilari P. Forssell P. Colonna 《Macromolecular Symposia》1999,138(1):245-248
This study evaluated the oxygen permeability (O.P.) of starch-sorbitol-water films produced by casting. With a sorbitol content <20%, O.P. (0.15 10−16 cm2/s.Pa for 8.8% sorbitol) was lower than for other polymers classically used as oxygen barriers. With a sorbitol content >20%, O.P. (1.6 10−16 cm2/s.Pa for 24.9% sorbitol) was higher than for starch films without a plasticizer. These results were correlated with molecular mobility as determined by time-domain NMR. Low and high O.P. corresponded respectively to a decrease and an increase of molecular mobility relative to sorbitol content. 相似文献