Results 261 to 270 of about 111,464 (290)
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The Estrada index of chemical trees
Journal of Mathematical Chemistry, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ilić, Aleksandar, Stevanović, Dragan
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TECHNIQUES FOR INJECTING CHEMICALS INTO TREES
Arboricultural Journal, 1985Summary Many existing techniques for applying solutions to woody plants are inexact, or require expensive apparatus and specialised training to use. Simple, cheap, and accurate methods are described for injecting volumes from 1 μ1 to 100 ml into main stems or branches of 5 mm diameter upwards.
J McP Dick, K A Longman
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Chemical Trees with Maximal VDB Topological Indices
match Communications in Mathematical and in Computer Chemistry, 2023Summary: A general vertex-degree-based (VDB) topological index of a graph \(G\) is defined as \[ \mathcal{T}_f=\mathcal{T}_f(G)=\sum_{uv\in E(G)}f(d_G(u),d_G(v)), \] where \(f(x,y)>0\) is a symmetric real function with \(x\ge 1\) and \(y\ge 1\).
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On structural properties of ABC-minimal chemical trees
Applied Mathematics and Computation, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiaoxia Wu, Lianzhu Zhang
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Ordering chemical trees by Wiener polarity index
Applied Mathematics and Computation, 2017zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ali Reza Ashrafi, Ali Ghalavand
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On Randić indices of chemical trees and chemical unicyclic graphs [PDF]
MATCH : communications in mathematical and in computer chemistry, 2009 The fourth maximum Randić indices for the n-vertex chemical trees for n /10 and n-vertex chemical unicyclic graphs for n / 7 are determined, respectively.
Du, Zhibin, Zhou, Bo, Trinajstic, Nenad
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Journal of Economic Entomology, 2001
Some recent high-load, low-density pheromone-release devices emit an ethanolic blend of pheromone directly onto crop foliage to control insect pests by mating disruption. This study characterized the phytotoxicity associated with deposition of some pheromonal compounds in concentrated drops on the foliage of trees bearing aerosol release devices.
P Y, Giroux, J R, Miller
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Some recent high-load, low-density pheromone-release devices emit an ethanolic blend of pheromone directly onto crop foliage to control insect pests by mating disruption. This study characterized the phytotoxicity associated with deposition of some pheromonal compounds in concentrated drops on the foliage of trees bearing aerosol release devices.
P Y, Giroux, J R, Miller
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The minimum ABC index of chemical trees
Discrete Applied MathematicszbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Chemical Interactions between Cloud Droplets and Trees
1988The chemical composition of both liquid droplet and leaf surface determines the behaviour of a cloud droplet on interception by vegetation. In some circumstances, particularly in wind-driven cloud, droplets may not adhere to foliage. Once on the leaf surface, the contact angle between the droplet and surface will determine the amount of water held by ...
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Caterpillar (Gutman) Trees in Chemical Graph Theory
1990Gutman trees (also known as caterpillar trees and benzenoid trees) are demonstrated to be elegant storage devices of information on graph-theoretical properties of many mathematical objects including benzenoid graphs, rook boards, king polyomino graphs, Clar graphs, and Young diagrams.
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