Results 61 to 70 of about 2,858,268 (305)

Zeta functions from graphs

AKCE International Journal of Graphs and Combinatorics, 2018
The location of the nontrivial poles of a generalized zeta function is derived from the spectrum of Ramanujan graphs and bounds are established for irregular graphs. The existence of a similarity transformation of the diagonal matrix given by a specified
Simon Davis
doaj   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

New constructions of nonregular cospectral graphs

Special Matrices
We consider two types of joins of graphs G1{G}_{1} and G2{G}_{2}, G1⊻G2{G}_{1}\hspace{0.33em}⊻\hspace{0.33em}{G}_{2} – the neighbors splitting join and G1∨=G2{G}_{1}\mathop{\vee }\limits_{=}{G}_{2} – the nonneighbors splitting join, and compute ...
Hamud Suleiman, Berman Abraham
doaj   +1 more source

On the spectral determinations of the connected multicone graphs

AKCE International Journal of Graphs and Combinatorics, 2020
In this study we investigate the spectra of the family of connected multicone graphs. A multicone graph is defined to be the join of a clique and a regular graph. Let , and be natural numbers, and let denote a complete graph on vertices.
Ali Zeydi Abdian, Lowell W. Beineke, Mohanmmad Reza Oboudi, Afshin Behmaram, Krishnaiyan Thulasiraman, Saeid Alikhani, Kewen Zhao   +6 more
doaj   +1 more source

Hypergraphs and hypermatrices with symmetric spectrum

, 2016
It is well known that a graph is bipartite if and only if the spectrum of its adjacency matrix is symmetric. In the present paper, this assertion is dissected into three separate matrix results of wider scope, which are extended also to hypermatrices. To
Nikiforov, V.
core   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

The coalescence of multi-wheel and starlike graphs is DLS [PDF]

Journal of Mahani Mathematical Research
The Laplacian spectrum of a graph is obtained by taking the difference of the adjacency spectrum from the diagonal matrix of degrees. If a graph has a unique Laplacian spectrum,  it means that  it can be identified by this spectrum, it is called $DLS ...
Mohammad Hasan Ahangarani Farahani, Gholam Hossein Fath-Tabar   +1 more
doaj   +1 more source

The spectral characterization of the connected multicone graphs

AKCE International Journal of Graphs and Combinatorics, 2020
A multicone graph is defined to be the join of a clique and a regular graph. Let , and be natural numbers, and let and denote a complete graph and a complete bipartite graph, respectively.
Ali Zeydi Abdian, Krishnaiyan Thulasiraman, Kewen Zhao   +2 more
doaj   +1 more source

Diversity and complexity in neural organoids

FEBS Letters, EarlyView.
Neural organoid research aims to expand genetic diversity on one side and increase tissue complexity on the other. Chimeroids integrate multiple donor genomes within single organoids. Self‐organising multi‐identity organoids, exogenous cell seeding, or enforced assembly of region‐specific organoids contribute to tissue complexity.
Ilaria Chiaradia, Madeline A. Lancaster
wiley   +1 more source

Spectra of the extended neighborhood corona and extended corona of two graphs

Electronic Journal of Graph Theory and Applications, 2016
In this paper we define extended corona and extended neighborhoodcorona of two graphs $G_{1}$ and $G_{2}$, which are denoted by$G_{1}\bullet G_{2}$ and $G_{1}\ast G_{2}$ respectively.
Chandrashekar Adiga, Rakshith B.R., Subba Krishna K.N.   +2 more
doaj   +1 more source