Results 11 to 20 of about 1,083,846 (122)

Degree-Based Topological Indices of Generalized Subdivision Double-Corona Product

Journal of Chemistry, 2022
Graph operations play an important role in constructing complex network structures from simple graphs. Computation of topological indices of these complex structures via graph products is an important task.
Ying Wang, Muhammad Waheed, Muhammad Kamran Jamil, Syed Mazhar Shah, Adnan Aslam, Hamideh Aram   +5 more
doaj   +3 more sources

Two Complex Graph Operations and their Exact Formulations on Topological Properties

Complexity, 2022
Graph operations are utilized for developing complicated graph structures from basic graphs, and these basic graphs can help to understand the properties of complex networks. While on the other side, the topological descriptor is known as a numeric value
Shehla Hameed, Muhammad Kamran Jamil, Muhammad Waheed, Muhammad Azeem, Senesie Swaray   +4 more
doaj   +2 more sources

About the Zagreb Indices [PDF]

Kemija u Industriji, 2010
The original Zagreb indices and some of their variants, such as the modified Zagreb indices, variable Zagreb indices, reformulated original Zagreb indices, reformulated modified Zagreb indices, Zagreb indices as complexity indices, general Zagreb indices,
Gutman, I., Miličević, A., Nikolić, S., Trinajstić, N.   +3 more
doaj   +3 more sources

On the Inverse Problem for Some Topological Indices

Journal of Mathematics, 2021
The study of the inverse problem (IP) based on the topological indices (TIs) deals with the numerical relations to TIs. Mathematically, the IP can be expressed as follows: given a graph parameter/TI that assigns a non-negative integer value g to every ...
Durbar Maji, Ganesh Ghorai, Muhammad Khalid Mahmood, Md. Ashraful Alam   +3 more
doaj   +2 more sources

Novel Distance-Based Molecular Descriptors for Styrene Butadiene Rubber Structures [PDF]

JTAM (Jurnal Teori dan Aplikasi Matematika)
Styrene-butadiene rubber (SBR) is a general-purpose rubber produced from a copolymer of styrene and butadiene.  It is used largely in automobile and truck tires. In general, it is considered to be an abrasion-resistant replacement for natural rubber.  In
Natarajan Chidambaram, Muhammad Kamran, Deepa Balasubramanian, Shahzaib Hameed, Saba Mehmood, Wasim Raza, Aamir Hussain Khan, Zainab Iqbal   +7 more
doaj   +2 more sources

On Trees with Greatest F-Invariant Using Edge Swapping Operations. [PDF]

Comput Intell Neurosci, 2022
The F‐index of a graph Q is defined as FQ=∑t∈VQdt3. In this paper, we use edge swapping transformations to find the extremal value of the F‐index among the class of trees with given order, pendent vertices, and diameter. We determine the trees with given order, pendent vertices, and diameter having the greatest F‐index value.
Wang W, Aslam A, Binyamin MA, Kanwal S, Irshad I.   +4 more
europepmc   +2 more sources

European guideline on obesity care in patients with gastrointestinal and liver diseases - Joint European Society for Clinical Nutrition and Metabolism / United European Gastroenterology guideline. [PDF]

United European Gastroenterol J, 2022
Abstract Background Patients with chronic gastrointestinal (GI) disease such as inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), celiac disease, gastroesophageal reflux disease (GERD), pancreatitis, and chronic liver disease (CLD) often suffer from obesity because of coincidence (IBD, IBS, celiac disease) or related pathophysiology ...
Bischoff SC, Barazzoni R, Busetto L, Campmans-Kuijpers M, Cardinale V, Chermesh I, Eshraghian A, Kani HT, Khannoussi W, Lacaze L, Léon-Sanz M, Mendive JM, Müller MW, Ockenga J, Tacke F, Thorell A, Vranesic Bender D, Weimann A, Cuerda C.   +18 more
europepmc   +2 more sources

Association of hairdressing with cancer and reproductive diseases: A systematic review

Journal of Occupational Health, Volume 64, Issue 1, January/December 2022., 2022
Abstract Objectives To review recent epidemiological studies investigating carcinogenic or reprotoxic effects among hairdressers who seem to be at greater risk for systemic adverse effects of chemicals released from hair care products than consumers.
Željka Babić, Marija Macan, Zrinka Franić, Sarah Hallmann, Martin S. Havmose, Jeanne D. Johansen, Swen M. John, Cara Symanzik, Wolfgang Uter, Patricia Weinert, Henk F. van der Molen, Sanja Kezic, Rajka Turk, Jelena Macan   +13 more
wiley   +1 more source

[Retracted] The Reformulated F‐Index of Vertex and Edge F‐Join of Graphs

Journal of Chemistry, Volume 2022, Issue 1, 2022., 2022
The valency based topological indices (TIs) are defined by algebraic functions as the chemical graph theory tools in which the structural parameters are used as input and the output is related with the topology of chemical species. In theoretical chemistry, the TIs are mainly used to investigate/develop the QSAR and QSPR investigations of the molecular
Durbar Maji, Ganesh Ghorai, Faria Ahmed Shami, Haidar Ali   +3 more
wiley   +1 more source

Some More Results on Reciprocal Degree Distance Index and ℱ‐Sum Graphs

Journal of Mathematics, Volume 2022, Issue 1, 2022., 2022
A chemical invariant of graphical structure Z is a unique value characteristic that remains unchanged under graph automorphisms. In the study of QSAR/QSPR, like many other chemical invariants, reciprocal degree distance has played a significant role to estimate the bioactivity of several compounds in chemistry.
Asima Razzaque, Saima Noor, Salma Kanwal, Ayesha Manzoor, Gohar Ali   +4 more
wiley   +1 more source