Results 11 to 20 of about 794 (142)

Topological Indices of Families of Bistar and Corona Product of Graphs

Journal of Mathematics, 2022
Topological indices are graph invariants that are used to correlate the physicochemical properties of a chemical compound with its (molecular) graph. In this study, we study certain degree-based topological indices such as Randić index, Zagreb indices ...
A. Khalid, N. Kausar, M. Munir, M. Gulistan, M. M. Al-Shamiri, T. Lamoudan   +5 more
doaj   +1 more source

Certain topological indices and polynomials for the semitotal-point graph and line graph of semitotal-point graph for Dutch windmill graph

Indonesian Journal of Combinatorics, 2020
Dutch windmill graph [1, 2] and denoted by Dnm. Order and size of Dutch windmill graph are (n−1)m+1 and mn respectively. In this paper, we computed certain topological indices and polynomials i.e.
Salma Kanwal, Mariam Imtiaz, Ayesha Manzoor, Nazeeran Idrees, Ammara Afzal   +4 more
doaj   +1 more source

M-Polynomials and Degree-Based Topological Indices of the Molecule Copper(I) Oxide

Journal of Chemistry, 2021
Topological indices are numerical parameters used to study the physical and chemical residences of compounds. Degree-based topological indices have been studied extensively and can be correlated with many properties of the understudy compounds.
Faryal Chaudhry, Iqra Shoukat, Deeba Afzal, Choonkil Park, Murat Cancan, Mohammad Reza Farahani   +5 more
doaj   +1 more source

Some topological properties of uniform subdivision of Sierpiński graphs

Main Group Metal Chemistry, 2021
Sierpiński graphs are family of fractal nature graphs having applications in mathematics of Tower of Hanoi, topology, computer science, and many more diverse areas of science and technology. This family of graphs can be generated by taking certain number
Liu Jia-Bao, Siddiqui Hafiz Muhammad Afzal, Nadeem Muhammad Faisal, Binyamin Muhammad Ahsan   +3 more
doaj   +1 more source

Comparative Study of Certain Synthetic Polymers via Bond-Additive Invariants

IEEE Access, 2021
Polymers, like vulcanized rubber, bakelite, and poly-methyl methacrylate (PMMA), are widely utilized as denture based materials, and their prominence has been nothing short of excellent. Recently, Ahmad et al.
Maqsood Ahmad, Muhammad Saeed, Muhammad Javaid   +2 more
doaj   +1 more source

Microelectrode recordings from the human cervical vagus nerve during maximal breath-holds. [PDF]

Exp Physiol
Abstract Voluntary breath‐holds can be sustained for a long time following training, but ultimately, regardless of duration, the asphyxic break‐point is reached and the apnoea terminated. The physiological changes occurring during the apnoea include a marked increase in sympathetically‐mediated vasoconstriction in non‐essential organs, such as skeletal
Macefield VG, Bain AR, Badour MI, Kumric M, Drvis I, Barak OF, Bozic J, Dujic Z.   +7 more
europepmc   +2 more sources

On Degree-Based Topological Indices of Thermodynamic Cuboctahedral Bi-Metallic Structure

Journal of Mathematics, 2022
Porous material such as metal-natural constructions and their particular partner metal-natural poly-hydra are made up of inorganic clusters with no saturation and exhibit great capability for utilization in the absorption of gas and ascending opening in ...
Guozhen Ma, Muhammad Ibrahim, Ghazanfar Abbas, M. K. Siddiqui, Samuel Asefa Fufa   +4 more
doaj   +1 more source

Topological Indices of the Pent-Heptagonal Nanosheets VC5C7 and HC5C7

Advances in Materials Science and Engineering, 2019
In this paper, we computed the topological indices of pent-heptagonal nanosheet. Formulas for atom-bond connectivity index, fourth atom-bond connectivity index, Randić connectivity index, sum-connectivity index, first Zagreb index, second Zagreb index ...
Fei Deng, Xiujun Zhang, Mehdi Alaeiyan, Abid Mehboob, Mohammad Reza Farahani   +4 more
doaj   +1 more source

Testing the quality of molecular structure descriptors. Vertex-degree-based topological indices [PDF]

Journal of the Serbian Chemical Society, 2013
The correlation ability of 20 vertex-degree-based topological indices, occurring in the chemical literature, is tested for the case of standard heats of formation and normal boiling points of octane isomers. It is found that the correlation ability of
Gutman Ivan, Tošović Jelena
doaj   +1 more source

Multiplicative Topological Properties on Degree Based for Fourth Type of Hex-Derived Networks

Journal of Function Spaces, 2022
Chemical graph theory is a subfield of graph theory that uses a molecular graph to describe a chemical compound. When there is at least one connection between the vertices of a graph, it is said to be connected.
Haidar Ali, Ghulam Dustigeer, Yong-Min Li, Muhammad Kashif Shafiq, Parvez Ali   +4 more
doaj   +1 more source