Results 81 to 90 of about 109,183 (305)

On Certain Aspects of Topological Indices

Journal of Mathematics, 2021
A topological index, also known as connectivity index, is a molecular structure descriptor calculated from a molecular graph of a chemical compound which characterizes its topology.
Tanweer Ul Islam, Zeeshan Saleem Mufti, Aqsa Ameen, Muhammad Nauman Aslam, Ali Tabraiz   +4 more
doaj   +1 more source

Refined BPS invariants of 6d SCFTs from anomalies and modularity

, 2017
F-theory compactifications on appropriate local elliptic Calabi-Yau manifolds engineer six dimensional superconformal field theories and their mass deformations.
Gu, Jie, Huang, Min-xin, Kashani-Poor, Amir-Kian, Klemm, Albrecht   +3 more
core   +1 more source

Designed Liquid Crystalline Nanoassemblies From Clinically Validated Polyunsaturated Lipids for Combined Antioxidant, Anti‐Apoptotic, and Neurotrophic Treatments

Advanced Healthcare Materials, EarlyView.
Ionizable lipid nanoparticles target multiple pathological pathways in neurodegeneration. The designed self‐assembled materials undergo a pH‐triggered structural transformation from a cubosome/hexosome coexistence to a hexosome phase, enhancing intracellular delivery of a multi‐target phytochemical formulation. The antioxidant‐loaded pH‐responsive LNPs
Thelma Akanchise, Fucen Luo, Borislav Angelov, Yuru Deng, Angelina Angelova   +4 more
wiley   +1 more source

A majorization method for localizing graph topological indices

, 2011
This paper presents a unified approach for localizing some relevant graph topological indices via majorization techniques. Through this method, old and new bounds are derived and numerical examples are provided, showing how former results in the ...
Alderson, Alessandra Cornaro, Anna Torriero, Bianchi, Bianchi, Bollobas, Boyd, Brouwer, Du, Grassi, Grone, Gutman, Gutman, Gutman, Harary, Koolen, Koolen, Li, Li, Liu, Liu, Lovász, Marshall, Monica Bianchi, Newman, Nikolić, Randić, Tarazaga, Todeschini, Zhou, Zhou, Zhou, Zhou, Zhou, Zhou   +34 more
core   +1 more source

On Structure Sensitivity and Chemical Applicability of Some Novel Degree-Based Topological Indices

MATCH – Communications in Mathematical and in Computer Chemistry
Numerous quantitative graph invariant-based topological indices have been developed in the literature and employed for correlation analysis in chemical graph theory.
Virendra Kumar, Shibsankar Das
semanticscholar   +1 more source

Common Signatures of Altered Gene Regulation and Invasiveness of Different Breast Cancer Cell Lines after Matrix Interface Crossing

Advanced Healthcare Materials, EarlyView.
Interface transmigration reprograms triple‐negative breast cancer cells, triggering a shared switch toward more aggressive and invasive phenotypes. Using a collagen I interface model, this study identifies shared transcriptional changes involving proliferation, chromatin remodeling, and DNA repair pathways.
Cornelia Clemens, Hannah Trampert, Nataliia Kotsiuba, Tilo Pompe   +3 more
wiley   +1 more source

Disordered Topological Insulators via $C^*$-Algebras

, 2010
The theory of almost commuting matrices can be used to quantify topological obstructions to the existence of localized Wannier functions with time-reversal symmetry in systems with time-reversal symmetry and strong spin-orbit coupling.
Eilers S., Halmos P. R., Hastings M. B., Hastings M. B. Loring T. A., Kitaev A., Kitaev A., Lin H., M. B. Hastings, T. A. Loring   +8 more
core   +1 more source

Uses of degree-based topological indices in QSPR analysis of alkaloids with poisonous and healthful nature

Frontiers of Physics
In this article, a quantitative structure-property relationship is performed for the prediction of six physico-chemical properties of 16 alkaloid structures using three different types of degree-based topological indices.
Muhammad Waheed Rasheed, A. Mahboob, Iqra Hanif   +2 more
semanticscholar   +1 more source

On extremal values of some degree-based topological indices with a forbidden or a prescribed subgraph [PDF]

Discrete Applied Mathematics
Xu in 2011 determined the largest value of the second Zagreb index in an $n$-vertex graph $G$ with clique number $k$, and also the smallest value with the additional assumption that $G$ is connected.
D'aniel Gerbner
semanticscholar   +1 more source

Spin and Charge Control of Topological End States in Chiral Graphene Nanoribbons on a 2D Ferromagnet

Advanced Materials, EarlyView.
Chiral graphene nanoribbons on a ferromagnetic gadolinium‐gold surface alloy display tunable spin and charge states at their termini. Atomic work function variations and exchange fields enabe transitions between singlet, doublet, and triplet configurations.
Leonard Edens, Francisco Romero‐Lara, Trisha Sai, Kalyan Biswas, Manuel Vilas‐Varela, Thomas Frederiksen, Diego Peña, Fabian Schulz, Jose Ignacio Pascual   +8 more
wiley   +1 more source