Results 11 to 20 of about 738 (133)

GraphReco: Probabilistic Structure Recognition for Chemical Molecules. [PDF]

open access: yesChemistryOpen
Molecule structure images are unfriendly for machine understanding, blocking productivity improvements in chemical data mining, drug discovery, and many other fields. We present a rule‐based probabilistic Optical Chemical Structure Recognition model to explain and tackle the ambiguity challenges in graph assembly.
Wang H, Yu Y, Liu JC.
europepmc   +2 more sources

Re-purposing Google maps visualisation for teaching logistics systems [PDF]

open access: yes, 2012
Routing is the process of selecting appropriate paths and ordering waypoints in a network. It plays an important part in logistics and supply chain management as choosing the optimal route can minimise distribution costs.
Cheong, C, Cheong, F, Jie, F
core   +1 more source

Radical‐Based On‐Surface Transformation of Nonplanar Aromatics Into Nonbenzenoid Nanographenes

open access: yesAngewandte Chemie, EarlyView.
Formation of radicals in nonplanar hydrocarbons through thermally induced dehydrogenation leads to molecular transformation via intramolecular radical‐based cyclization and dimerization, leading to formation of nonbenzenoid nanographenes. ABSTRACT On‐surface synthesis has emerged as a powerful tool for atomically precise C─C bond formation, enabling ...
Daniel Rothhardt   +8 more
wiley   +2 more sources

Storing the wisdom: chemical concepts and chemoinformatics [PDF]

open access: yes, 2018
The purpose of the paper is to examine the nature of chemical concepts, and the ways in which they are applied in chemoinformatics systems. An account of concepts in philosophy and in the information sciences leads to an analysis of chemical concepts ...
David Bawden
core   +1 more source

Boron‐Doping of a Macrocyclic Tetrafuran Framework Unveils an Expanded Porphyrinoid With Switchable (Anti)Aromaticity and Conformational Dynamics

open access: yesAngewandte Chemie, EarlyView.
We disclose a novel boron macrocycle derived from the sustainable furan building block. The boraporphyrinoid exhibits a global antiaromatic ring current and dynamic conformational flexibility. Twofold reduction induces a switch to strong global aromaticity, accompanied by stiffening of the porphyrinoid backbone.
Lukas Swoboda   +6 more
wiley   +2 more sources

ACEMBL Tool-Kits for High-Throughput Multigene Delivery and Expression in Prokaryotic and Eukaryotic Hosts [PDF]

open access: yes, 2016
Multicomponent biological systems perform a wide variety of functions and are crucially important for a broad range of critical health and disease states.
A Basters   +71 more
core   +3 more sources

On the number of Kekulé structures of fluoranthene congeners [PDF]

open access: yesJournal of the Serbian Chemical Society, 2010
The Kekulé structure count K of fluoranthene congeners is studied. It is shown that for such polycyclic conjugated π-electron systems, either K = 0 or K ≥ 3.
DAMIR VUKIČEVIĆ   +2 more
doaj  

Algebraic structure count of linear phenylenes and their congeners [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
The algebraic structure count of the linear phenylene with h six-membered rings is known to be equal to h + 1. We show that the same expression applies if each four-membered ring in the phenylene is replaced by a linear array consisting of k four ...
IVAN GUTMAN
doaj  

Clar theory and resonance energy [PDF]

open access: yes, 2005
A mathematical model, referred here as the Zhang–Zhang polynomial ζ(x), that embraces all the main concepts encountered in the Clar aromatic sextet theory of benzenoid hydrocarbons, was recently put forward by Zhang and Zhang.
Furtula, Boris   +2 more
core   +1 more source

Speciation, Structural Refinement, and Distribution of Ti Sites in Titanium Silicalite‐1 From 47/49Ti NMR Crystallography at 28.2 Tesla

open access: yesAngewandte Chemie, Volume 138, Issue 15, 6 April 2026.
Titanium silicalite‐1 (TS‐1), used in industrial selective oxidation processes, depends on specific, yet still unresolved Ti sites, dispersed within the framework of an MFI‐zeolite. Applying high field (28.2 T) 47/49Ti NMR and 17O NMR spectroscopy for an array of TS‐1 catalysts enables the development of an NMR crystallography protocol and the ...
Christoph J. Kaul   +14 more
wiley   +2 more sources

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