Results 191 to 200 of about 27,771,751 (275)
Synthesis and Aggregation of Amphiphilic Porphyrin‐Perylenebisimide Dyads
Chemistry – A European Journal, Accepted Article.We report the straightforward synthesis of a family of amphiphilic zinc‐porphyrin‐perylenebisimide dyads containing sterically demanding substituents at the porphyrin meso‐position, as well as at the PBI bay position. The hydrophilic head group consists of oligo‐carboxylic acid G2‐Newkome dendrons attached to the porphyrin, whereas lipophilic pentyl ...
Erik Schulze +4 more
wiley +1 more source
Chemistry – A European Journal, Accepted Article.Amphiphilic Janus dendrimers (AJDs) are a promising class of macromolecules capable of self‐assembling into well‐defined nanostructures. In this study, AJDs were synthesized employing, for the first time, the activated alkyne‐hydroxyl "click" chemistry approach, enabling the construction of dendritic architectures under mild conditions.
Hossein Rasoulmosaedi +4 more
wiley +1 more source
In Vitro Psilocybin Synthesis by Co‐Immobilized Enzymes
Chemistry – A European Journal, EarlyView.The drug candidate and psychedelic mushroom product psilocybin was produced by multienzyme‐charged beads in a biocatalytic cell‐free approach. Using immobilized fungal indolethylamine biosynthetic and additional bacterial enzymes, these beads turned over 4‐hydroxy‐l‐tryptophan to psilocybin.
Tim Schäfer +7 more
wiley +1 more source
Chemistry – A European Journal, Accepted Article.The direct radical arylation of tyrosine residues in peptides has been achieved under highly attractive conditions, requiring only the peptide substrate, a 3,4,5‐trifluorophenyldiazonium salt and irradiation with visible light. Being well‐balanced in its reactivity to form strong charge transfer complexes with the phenolic side chain, which are ...
Markus Rolf Heinrich +5 more
wiley +1 more source
Discontinuous Galerkin Methods for Friedrichs’ Systems [PDF]
, 2007 This work presents a unified analysis of Discontinuous Galerkin methods to approximate Friedrichs’ systems. A general set of boundary conditions is identified to guarantee existence and uniqueness of solutions to these systems. A formulation enforcing the boundary conditions weakly is proposed.
Alexandre Ern, Jean‐Luc Guermond
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MLN, 1983 Friedrich Schlegel's novel Lucinde is not, so the author observed in entry 2071 of his Literary Notebooks, a true Romantic work. Earlier he had noted: "Eigentlich ist alle Poesie = Romantisch!"2 Paradox and contradiction are, of course, not considered unusual in Schlegel's writings. Examples are easy to find, and the principle itself defended.
Marcus Bullock
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The Lax–Friedrichs sweeping method for optimal control problems in continuous and hybrid dynamics
Nonlinear Analysis: Theory, Methods & Applications, 2005 Abstract We implement the Lax–Friedrichs sweeping (LFS) method to approximate the solution to the Hamilton–Jacobi (HJ) equation arising in an infinite horizon optimal control problem. The fast sweeping method approximates the viscosity solution of a boundary value problem for HJ equations.
Chiu Yen Kao +2 more
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Simulation Analysis for Peak Pressure of Shock Wave Based on Lax-Friedrichs Method
2012 Fifth International Conference on Information and Computing Science, 2012 FEM software has been well-developed in shock wave simulation. As the software usually is huge and complicated, subdivision mesh needs lots of computation, and the precision is not assured, finite-difference methods are highly regarded. Difference schemes are related to the stability and precision.
Shijie Ye +3 more
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Analysis of GRIN Lens Antennas through the Lax-Friedrichs Sweeping Method
2024 IEEE International Symposium on Antennas and Propagation and INC/USNC‐URSI Radio Science Meeting (AP-S/INC-USNC-URSI)The analysis of Graded-Index (GRIN) lenses involves employing ray tracing algorithms, which address the Eikonal equation to determine phase distribution. Subsequently, the transport equation is solved to retrieve the amplitude. In this paper, we introduce a novel analysis approach based on a numerical technique known as the Lax-Friedrichs Sweeping ...
Ilir Gashi, S. Maci, Matteo Albani
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Journal of Scientific Computing, 2015 Fast sweeping methods are efficient Gauss---Seidel iterative numerical schemes originally designed for solving static Hamilton---Jacobi equations. Recently, these methods have been applied to solve hyperbolic conservation laws with source terms. In this paper, we propose Lax---Friedrichs fast sweeping multigrid methods which allow even more efficient ...
Weitao Chen +2 more
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