Results 1 to 10 of about 3,829,561 (285)

Some lower and upper bounds on the third ABC index

AKCE International Journal of Graphs and Combinatorics, 2016
Atom-bond connectivity (ABC) index has been applied up to now to study the stability of alkanes and the strain energy of cycloalkanes. Graovac defined the second ABC index as ABC2(G)=∑vivj∈E(G)1ni+1nj−2ninj, and Kinkar studied the upper bounds.
Dae-Won Lee
doaj   +4 more sources

Computing multiple ABC index and multiple GA index of some grid graphs [PDF]

Open Physics, 2018
Topological indices are the atomic descriptors that portray the structures of chemical compounds and they help us to anticipate certain physico-compound properties like boiling point, enthalpy of vaporization and steadiness.
Gao Wei, Siddiqui Muhammad Kamran, Naeem Muhammad, Imran Muhammad   +3 more
doaj   +3 more sources

On the Maximum ABC Index of Graphs With Prescribed Size and Without Pendent Vertices

IEEE Access, 2018
The atom-bond connectivity (ABC) index is one of the most actively studied degree-based graph invariants, which are found in a vast variety of chemical applications. For a simple graph G, it is defined as ABC(G) = Σuv∈E(G)((d(u) + d(v) - 2)/
Zehui Shao, Pu Wu, Xiujun Zhang, Darko Dimitrov, Jia-Bao Liu   +4 more
doaj   +4 more sources

On the maximum ABC index of bipartite graphs without pendent vertices [PDF]

Open Chemistry, 2020
For a simple graph G, the atom–bond connectivity index (ABC) of G is defined as ABC(G) = ∑uv∈ E(G)d(u)+d(v)−2d(u)d(v), $\sum_{uv\in{}E(G)} \sqrt{\frac{d(u)+d(v)-2}{d(u)d(v)}},$where d(v) denotes the degree of vertex v of G.
Shao Zehui, Wu Pu, Jiang Huiqin, Sheikholeslami S.M., Wang Shaohui   +4 more
doaj   +4 more sources

Inequalities on the Generalized ABC Index [PDF]

Mathematics, 2021
In this work, we obtained new results relating the generalized atom-bond connectivity index with the general Randić index. Some of these inequalities for ABCα improved, when α=1/2, known results on the ABC index. Moreover, in order to obtain our results,
Paul Bosch, Edil D. Molina, José M. Rodríguez, José M. Sigarreta   +3 more
doaj   +3 more sources

ABC Index: quantifying experienced burden of COPD in a discrete choice experiment and predicting costs. [PDF]

BMJ Open, 2017
Objective The Assessment of Burden of COPD (ABC) tool supports shared decision making between patient and caregiver. It includes a coloured balloon diagram to visualise patients’ scores on burden indicators. We aim to determine the importance of each indicator from a patient perspective, in order to calculate a ...
Goossens LMA, Rutten-van Mölken MPMH, Boland MRS, Donkers B, Jonker MF, Slok AHM, Salomé PL, van Schayck OCP, In 't Veen JCCM, Stolk EA, research team that developed the ABC tool..   +10 more
europepmc   +6 more sources

On the maximal general ABC index of graphs with given maximum degree

Applied Mathematics and Computation, 2020
The atom-bond connectivity index ABC is a topological index that has recently found remarkable applications in the study of the strain energy of cycloalkanes as well as in rationalizing the stability of linear and branched alkanes. In order to improve the correlation properties of the atom-bond connectivity index for the heat of formation of alkanes ...
Kinkar Chandra Das, José M Rodríguez
exaly   +5 more sources

ABC Index Analysis: Physical Properties of Prenylated Xanthone

Jurnal Diferensial
Xanthone is a heterocyclic compound with various substituents (hydroxy, prenyl, geranyl, methoxy, halogens, and others). The presence of these substituents contributes to diverse biological activities, including anticancer, antidiabetic, and antioxidant
Lia Fitta Pratiwi, Ardelia Mufarrihati, Ni Komang Tri Dharmayani, I Gede Adhitya Wisnu Wardhana   +3 more
doaj   +2 more sources

Diagnostic and prognostic utility of neutrophil CD64 and monocyte HLA-DR in adult sepsis patients [PDF]

BMC Research Notes
Aim To evaluate the diagnostic and prognostic accuracy of nCD64, mHLA-DR and sepsis Index (SI), ratio of nCD64 and mHLA-DR, in patients with sepsis.
Kajal Arora, Susheel Kumar, Man Updesh Singh Sachdeva, Deba Prasad Dhibar, Ashish Bhalla, Navneet Sharma   +5 more
doaj   +2 more sources

Developing a utility index for the Aberrant Behavior Checklist (ABC-C) for fragile X syndrome [PDF]

Quality of Life Research, 2014
This study aimed to develop a utility index (the ABC-UI) from the Aberrant Behavior Checklist-Community (ABC-C), for use in quantifying the benefit of emerging treatments for fragile X syndrome (FXS).The ABC-C is a proxy-completed assessment of behaviour and is a widely used measure in FXS. A subset of ABC-C items across seven dimensions was identified
Elizabeth Berry-Kravis, John Brazier, Donald B Bailey   +2 more
exaly   +5 more sources