TRANSIT INDEX OF A GRAPH AND ITS CORRELATION WITH MON OF OCTANE ISOMERS

2020 ◽  
Vol 9 (4) ◽  
pp. 1825-1833
Author(s):  
K. M. Reshmi ◽  
R. Pilakkat
Keyword(s):  
Octane Isomers

Inverse Sum Indeg Index of Subdivision, t-Subdivision Graphs, and Related Sums

2020 ◽  
pp. 104-119 ◽  
Author(s):  
Amitav Doley ◽  
Jibonjyoti Buragohain ◽  
A. Bharali
Keyword(s):  
Surface Area ◽  
Maximum Degree ◽  
Minimum Degree ◽  
Total Surface Area ◽  
Upper Bounds ◽  
Lower And Upper Bounds ◽  
Zagreb Index ◽  
Octane Isomers ◽  
Graph Parameters ◽  
The First Zagreb Index

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.

A Novel Weighted First Zagreb Index of Graph

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.

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

2007 ◽  
Vol 111 (1) ◽  
pp. 210-218 ◽  
Author(s):  
Carsten Sievers ◽  
Ayumu Onda ◽  
Alexander Guzman ◽  
Kerstin S. Otillinger ◽  
Roberta Olindo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Zeolite X ◽  
Octane Isomers ◽  
Temperature Activation

Effects of fuel branching on the propagation of octane isomers flames

2012 ◽  
Vol 159 (4) ◽  
pp. 1426-1436 ◽  
Author(s):  
Chunsheng Ji ◽  
S. Mani Sarathy ◽  
Peter S. Veloo ◽  
Charles K. Westbrook ◽  
Fokion N. Egolfopoulos
Keyword(s):  
Octane Isomers
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