Results 61 to 70 of about 12,581 (214)

Computational Analysis of Benzenoid Systems Using Valency-Based Entropy Metrics and Topological Indices

Complexity
Nanomaterials find application in electronics, drugs, and biology among other disciplines. Benzenoid systems with their homogeneous structures are especially fit for computer study because of their predictable geometries.
Muhammad Kamran, Muhammad Nadeem, Manal E. M. Abdulla, Ismail Naci Cangul, Nurullayev Mirolim Nosirovich   +4 more
doaj   +1 more source

On the number of Kekulé structures of fluoranthene congeners [PDF]

Journal of the Serbian Chemical Society, 2010
The Kekulé structure count K of fluoranthene congeners is studied. It is shown that for such polycyclic conjugated π-electron systems, either K = 0 or K ≥ 3.
DAMIR VUKIČEVIĆ, JELENA ĐURĐEVIĆ, IVAN GUTMAN   +2 more
doaj  

Novel Face Index for Benzenoid Hydrocarbons

Mathematics, 2020
A novel topological index, the face index ( F I ), is proposed in this paper. For a molecular graph G, face index is defined as F I ( G ) = ∑ f ∈ F ( G ) d ( f ) = ∑ v ∼ f , f ∈ F ( G ) d ( v ...
Muhammad Kamran Jamil, Muhammad Imran, Kanza Abdul Sattar   +2 more
doaj   +1 more source

Synthesis and Characterization of Juglone‐Derived cu (II), Mn (II) and Zn (II) Complexes and Investigation of Their Cytotoxic Activities Against Lung and Colon Cancer Cells in Vitro and in Silico

Journal of Applied Toxicology, EarlyView.
ABSTRACT Three new Zn (II), Cu (II) and Mn (II) complexes have been synthesized from 5‐hydroxy‐1,4‐naphthoquinone (HNQ). Elemental analysis, magnetic susceptibility, UV–Vis, IR and Mass spectrometry have all been used to explore the structural characterization of these compounds.
Mustafa Öztatlıcı, Turan Birimoğlu, Semih Güler, Rukiye Betül Çolaksel, Mehmet Tahir Husunet, Mehmet Sönmez   +5 more
wiley   +1 more source

A curious family of convex benzenoids and their altans [PDF]

Discrete Mathematics Letters, 2022
Nino Bašić, Patrick W. Fowler
doaj   +1 more source

Salt‐induced nutritional and metabolic shifts in halophytes: implications for food security

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Plant species vary in their response to salinity: some crops show a degree of salt tolerance, while halophytes – whether wild or cultivated – are characterized by a high capacity to thrive under saline conditions. Halophytes are considered a source of valuable secondary metabolites with potential economic value, yet they might also produce ...
Giulia Atzori, Pedro Garcia Caparros, Antonella Castagna, Luisa Custódio, Valentina Lazazzara, Claus Krogh Madsen, Felicia Menicucci, Maria João Rodrigues, Katalin Solymosi, Jose Ramon Acosta Motos   +9 more
wiley   +1 more source

Vertex-degree-based molecular structure descriptors of benzenoid systems and phenylenes [PDF]

Journal of the Serbian Chemical Society, 2012
Several recently published papers report expressions for various vertex-degree-based molecular structure descriptors of benzenoid systems and phenylenes. We deduce here the general expression for these descriptors, and show that a simple and generally
Gutman Ivan, Furtula Boris
doaj   +1 more source

A parallel algorithm for the enumeration of benzenoid hydrocarbons

, 2009
We present an improved parallel algorithm for the enumeration of fixed benzenoids B_h containing h hexagonal cells. We can thus extend the enumeration of B_h from the previous best h=35 up to h=50.
Brinkmann G, Caporossi G, Enting I G, Enting I G, Gutman I, Guttmann A J, Ince E L, Iwan Jensen, Jensen I, Jensen I, Jensen I, Jensen I, Jensen I, Knuth D E, Vöge M   +14 more
core   +3 more sources

Generalist‐pollinated Arabis alpina exhibits floral scent variation at multiple scales

Nordic Journal of Botany, EarlyView.
Plants that depend on animals for reproduction often use complex floral traits to attract pollinators. Floral scent is recognized as part of the pollinator attraction module and can be shaped by plant‐pollinator interactions. In recent decades, research has started to reveal the dynamic properties of floral scent, identifying patterns of spatial and ...
Hanna Thosteman, Katherine Eisen, Clara McNaughton Montgomery, Xuefei Cheng, Loretta Pace, Magne Friberg   +5 more
wiley   +1 more source

Structure-Sensitive Mechanism of Nanographene Failure

, 2010
The response of a nanographene sheet to external stresses is considered in terms of a mechanochemical reaction. The quantum chemical realization of the approach is based on a coordinate-of-reaction concept for the purpose of introducing a mechanochemical
A. Chuvilin, A. Hemmasizadeh, A. Sakhaee-Pour, A. Tobolski, C. Jin, C. Lee, C. Li, E. A. Nikitina, E. A. Nikitina, E. F. Sheka, E. F. Sheka, E. F. Sheka, E. F. Sheka, F. Liu, G. Lier Van, H. Bu, J.-L. Tsai, K. Hashemnia, K. Kudin, L. H. Shaymardanova, M. J. S. Dewar, M. M. Shokrieh, M. Topsakal, N. A. Popova, P. Pulay, V. A. Popova, V. A. Zayets, V. D. Khavryutchenko, V. Khavryutchenko, X. Wei, Y. Gao, Y. Guo   +31 more
core   +1 more source