Results 41 to 50 of about 2,869 (126)

π‐Expanded Fluoranthenes as Chromophores With Tailored Properties

open access: yesHelvetica Chimica Acta, Volume 109, Issue 3, March 2026.
A series of π‐expanded fluoranthene scaffolds selectively functionalized with electron donors and acceptors were synthesized. The evolution of the structural, optoelectronic, and redox properties in relation to substitution and cyclization was comprehensively studied both in experiment and in theory. The results identify the compounds as highly tunable
Silas C. Eiden   +4 more
wiley   +1 more source

Coupled on‐line in crystallo UV–Vis absorption spectroscopy and X‐ray crystallography to compare specific radiation damage in metal‐containing proteins at room versus cryogenic temperature

open access: yesActa Crystallographica Section D, Volume 82, Issue 3, Page 187-198, March 2026.
We used on‐line in crystallo UV–Vis absorption spectroscopy in conjunction with X‐ray crystallography on beamline BM07‐FIP2 at the ESRF to compare the structural effects of specific radiation damage on two different metal‐containing proteins at either room or cryogenic temperature.Specific radiation damage (SRD) to proteins is a pertinent issue ...
Nicolas Caramello   +6 more
wiley   +1 more source

Crystal structure of plant γ‐glutamyl peptidase 1: implications for sulfur metabolism and secondary metabolite biosynthesis

open access: yesThe FEBS Journal, Volume 293, Issue 5, Page 1400-1414, March 2026.
The crystal structures of Arabidopsis thaliana γ‐glutamyl peptidase 1 (GGP1), including the covalent intermediate state, were determined. GGP1 is involved in both glutathione degradation in the primary metabolism and glutathione conjugate processing in the secondary metabolism of glucosinolate and camalexin biosynthesis.
Kosei Sone   +7 more
wiley   +1 more source

Protein Structure Determination by Racemic and Quasi‐Racemic X‐Ray Crystallography

open access: yesChemBioChem, Volume 27, Issue 4, 25 February 2026.
Racemic mixtures of protein enantiomers facilitate formation of diffraction‐quality crystals in centrosymmetric space groups that have quantized phases which simplify structure solution. Quasi‐racemic mixtures of a protein and its mirror image isomorph similarly facilitate formation of highly ordered crystals.
Stephen B. H. Kent
wiley   +1 more source

Sturmian morphisms, the braid group B_4, Christoffel words and bases of F_2

open access: yes, 2005
We give a presentation by generators and relations of a certain monoid generating a subgroup of index two in the group Aut(F_2) of automorphisms of the rank two free group F_2 and show that it can be realized as a monoid in the group B_4 of braids on ...
A. de Luca   +25 more
core   +1 more source

Categories without structures [PDF]

open access: yes, 2009
The popular view according to which Category theory provides a support for Mathematical Structuralism is erroneous. Category-theoretic foundations of mathematics require a different philosophy of mathematics.
Rodin, Andrei
core   +5 more sources

Cohomology for Anyone

open access: yes, 2003
Crystallography has proven a rich source of ideas over several centuries. Among the many ways of looking at space groups, N. David Mermin has pioneered the Fourier-space approach.
Fisher, Benji N.   +2 more
core  

Minimal Triangulations of Manifolds

open access: yes, 2007
In this survey article, we are interested on minimal triangulations of closed pl manifolds. We present a brief survey on the works done in last 25 years on the following: (i) Finding the minimal number of vertices required to triangulate a given pl ...
Datta, Basudeb
core   +1 more source

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