Results 61 to 70 of about 3,593 (248)

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Computing Fourth Atom-bond Connectivity Index of V-Phenylenic Nanotubes and Nanotori

Acta Chimica Slovenica, 2013
Among topological descriptors connectivity topological indices are very important and they have a prominent role in chemistry. One of them is atom-bond connectivity (ABC) index defined as ABC(G)= [formula:see text], in which degree of vertex v denoted ...
Mohammad Reza Farahani
doaj  

Graph-theoretic and computational analysis of QSAR molecular descriptors for single chain diamond silicates

Discover Chemistry
This study presents a comprehensive graph-theoretic and computational analysis of Quantitative Structure–Activity Relationship (QSAR) molecular descriptors for Single Chain Diamond Silicates (CSn), a crucial class of silicate structures defined by their ...
S. Mohankumar, P. Sivakumar, S. Priyatharshni   +2 more
doaj   +1 more source

Study of Hardness of Superhard Crystals by Topological Indices

Journal of Chemistry, 2021
Topological indices give immense information about a molecular structure or chemical structure. The hardness of materials for the indentation can be defined microscopically as the total resistance and effect of chemical bonds in the respective materials.
Xiujun Zhang, Muhammad Naeem, Abdul Qudair Baig, Manzoor Ahmad Zahid   +3 more
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Analysis of expected value of connectivity indices of random 2T2 kink chains

Frontiers in Physics
In this work, we calculated the product connectivity index of three structures for the T2-type twists and formulated expressions of expected values of the forgotten index, atom bond connectivity index, sum connectivity index, product connectivity index ...
Xuemin Ling, Asima Razzaque, Asima Razzaque, Maham Khalil, Salma Kanwal, Saima Noor, Saima Noor, Robina Nazir, Robina Nazir   +8 more
doaj   +1 more source

Some Topological Invariants of Graphs Associated with the Group of Symmetries

Journal of Chemistry, 2020
A topological index is a quantity that is somehow calculated from a graph (molecular structure), which reflects relevant structural features of the underlying molecule.
Chang-Cheng Wei, Muhammad Salman, Usman Ali, Masood Ur Rehman, Muhammad Aqeel Ahmad Khan, Muhammad Hasanain Chaudary, Farooq Ahmad   +6 more
doaj   +1 more source

Degree-Based Topological Indices of Polysaccharides: Amylose and Blue Starch-Iodine Complex

Journal of Chemistry, 2021
Starch is a polymer of glucose where alpha-linkages are associated with glucopyranose units. It comprises a mixture of amylose and amylopectin. Furthermore, amylose is a linear chain of hundreds of glucose molecules.
Anam Rani, Usman Ali
doaj   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Testing the quality of molecular structure descriptors. Vertex-degree-based topological indices [PDF]

Journal of the Serbian Chemical Society, 2013
The correlation ability of 20 vertex-degree-based topological indices, occurring in the chemical literature, is tested for the case of standard heats of formation and normal boiling points of octane isomers. It is found that the correlation ability of
Gutman Ivan, Tošović Jelena
doaj   +1 more source