Results 1 to 10 of about 5,663,589 (279)
Chemical trees minimizing energy and Hosoya index [PDF]
, 2008 The energy of a molecular graph is a popular parameter that is defined as the sum of the absolute values of a graph’s eigenvalues. It is well known that the energy is related to the matching polynomial and thus also to the Hosoya index via a certain ...
C. Heuberger, S. Wagner
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Exploring and mapping chemical space with molecular assembly trees
Science Advances, 2021 Assembly theory is used to map molecular and gene assembly pathways exploring evolutionary trajectories looking for novelty.
Yu Liu +5 more
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Trees as Bioindicators of Environmental Pollution and Its Impact on Wood Chemical Composition
BioResources, 2021 Trees provide one of the most versatile biomass resources for many applications, namely wood. The chemical composition of wood determines its properties, being of real significance for its further capitalization, and depending on many factors. In nature,
Carmen-Alice Teacă
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On the Extremal Trees for Some Bond Incident Degree Indices with a Fixed Number of Segments
Journal of Chemistry, 2022 The Gourava indices and hyper-Gourava indices are introduced by Kulli in 2017. These graph invariants are related to the degree of vertices of a graph G. Let Tn,r be the class of all n−vertex chemical trees with r segments. In this paper, we characterize
Muzamil Hanif +3 more
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Note on the Hyper-Wiener Index [PDF]
Journal of the Serbian Chemical Society, 2003 The hyper-Wiener index WW of a chemical tree T is defined as the sum of the products n1n2, over all pairs u, u of vertices of T, where n1 and n2 are the number of vertices of T, lying on the two sides of the path which connects u and u.
IVAN GUTMAN +2 more
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Chemical analysis of fodder tree leaves found in Sunsari district, Nepal
Bibechana, 2012 Altogether 55 fodder trees were collected with their local information from Sunsari district, Nepal. Among them, the leaves of 19 fodder trees were analyzed for dry matter, crude protein, ether extract, crude fibre, N-free extract, total ash and mineral
TN Mandal, TP Gautam
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Small-dispersed dust chemical composition on the leaves of apricot trees (Prunus armeniaca) in residential area [PDF]
E3S Web of Conferences, 2019 A study of the small-dispersed dust chemical composition on the leaves of apricot trees (Prunus armeniaca) in the residential area of the Sredneakhtubinsky district of the Volgograd region was coducted.
Glinyanova Irina
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Extremal Chemical Trees of the First Reverse Zagreb Alpha Index
, 2017 Topological indices have important effect to develop chemical sciences by using graph invariants. The Zagreb indices are the most used topological indices in mathematical chemistry literature.
S. Ediz
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Agriculture, 2023 To address the current difficult problem of scientifically assessing the health status of date palm trees due to a single parameter for date palm health assessment, an imperfect index system, and low precision.
Yuzhen Wu +4 more
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Lignin from Tree Barks: Chemical Structure and Valorization
ChemSusChem, 2020 AbstractLignins from different tree barks, including Norway spruce (Picea abies), eucalyptus (Eucalyptus globulus), mimosa (Acacia dealbata) and blackwood acacia (A. melanoxylon), are thoroughly characterized. The lignin from E. globulus bark is found to be enriched in syringyl (S) units, with lower amounts of guaiacyl (G) and p‐hydroxyphenyl (H) units
Duarte M. Neiva +6 more
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