Effects of fuel branching on the propagation of octane isomers flames

The inverse sum indeg (ISI) index of a graph G is defined as the sum of the weights dG(u)dG(v)/dG(u)+dG(v) of all edges uv in G, where dG(u) is the degree of the vertex u in G. This index is found to be a significant predictor of total surface area of octane isomers. In this chapter, the authors present some lower and upper bounds for ISI index of subdivision graphs, t-subdivision graphs, s-sum and st -sum of graphs in terms of some graph parameters such as order, size, maximum degree, minimum degree, and the first Zagreb index. The extremal graphs are also characterized for their sharpness.

Download Full-text

A Novel Weighted First Zagreb Index of Graph

Handbook of Research on Advanced Applications of Graph Theory in Modern Society - Advances in Computer and Electrical Engineering ◽

10.4018/978-1-5225-9380-5.ch004 ◽

2020 ◽

pp. 92-103

Author(s):

Jibonjyoti Buragohain ◽

A. Bharali

Keyword(s):

Connected Graph ◽

Chemical Properties ◽

Topological Indices ◽

First Zagreb Index ◽

Acentric Factor ◽

Zagreb Index ◽

Zagreb Indices ◽

Physico Chemical ◽

Octane Isomers ◽

The First Zagreb Index

The Zagreb indices are the oldest among all degree-based topological indices. For a connected graph G, the first Zagreb index M1(G) is the sum of the term dG(u)+dG(v) corresponding to each edge uv in G, that is, M1 , where dG(u) is degree of the vertex u in G. In this chapter, the authors propose a weighted first Zagreb index and calculate its values for some standard graphs. Also, the authors study its correlations with various physico-chemical properties of octane isomers. It is found that this novel index has strong correlation with acentric factor and entropy of octane isomers as compared to other existing topological indices.

Download Full-text

Low-Temperature Activation of Branched Octane Isomers over Lanthanum-Exchanged Zeolite X Catalysts

The Journal of Physical Chemistry C ◽

10.1021/jp063487s ◽

2007 ◽

Vol 111 (1) ◽

pp. 210-218 ◽

Cited By ~ 17

Author(s):

Carsten Sievers ◽

Ayumu Onda ◽

Alexander Guzman ◽

Kerstin S. Otillinger ◽

Roberta Olindo ◽

...

Keyword(s):

Low Temperature ◽

Zeolite X ◽

Octane Isomers ◽

Temperature Activation

Download Full-text

HDR Degree Bassed Indices and Mhr-Polynomial for the Treatment of COVID-19

Biointerface Research in Applied Chemistry ◽

10.33263/briac126.72147225 ◽

2021 ◽

Vol 12 (6) ◽

pp. 7214-7225

Keyword(s):

Regression Analysis ◽

Physicochemical Properties ◽

Topological Index ◽

Research Work ◽

Topological Indices ◽

Structure Property ◽

Zagreb Index ◽

Mathematical Properties ◽

Octane Isomers

In this research work, We introduce topological indices, namely as an HDR version of Modified Zagreb topological index (HDRM*), HDR version of Modified forgotten topological index (HDRF*), and HDR version of hyper Zagreb index (HDRHM*). Then the relatively study depends on the structure-property regression analysis to test and compute the chemical applicability of these indices to predict the physicochemical properties of octane isomers. Also, we show these HDR indices have well degeneracy properties compared to other degree-based topological indices. Also, We defined and computed the Mhr-polynomial of the newly indices and applied it on COVID-19 treatments. Also, we discussed some mathematical properties of HDR indices.

Download Full-text