Results 11 to 20 of about 96,632 (252)
Note of 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 υ,ν 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 υ and ν.
Gutman Ivan +2 more
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Molecules, 2023 In this study, seven types of α-hydroxycarboxylic acids were selected to form composite catalysts with boric acid, and their catalytic properties were studied using the catalytic hydration of α-pinene.
Zhonglei Meng +7 more
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Agriculture, 2021 In 2019–2020, trials were carried out with the aim of evaluating the possibilities of using an organic fertilizer, reported to have a biostimulant action, for promoting the growth of young olive trees.
Mona Mazeh +8 more
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Zeitschrift für Naturforschung A, 2002 A variety of molecular-graph-based structure-descriptors were proposed, in particular the Wiener index W. the largest graph eigenvalue λ1, the connectivity index X, the graph energy E and the Hosoya index Z, capable of measuring the branching of the carbon-atom skeleton of organic compounds, and therefore suitable for describing several of their ...
Miranca Fischermann +5 more
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Nanomaterials, 2023 The research on the high-value utilization of biomass has good application prospects and is conducive to sustainable development. In this paper, three different types of activators (potassium hydroxide, phosphoric acid, and polypropylene) were used to ...
Xifeng Lv +5 more
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Terpenoid variations within and among half-sibling avocado trees, Persea americana Mill. (Lauraceae). [PDF]
PLoS ONE, 2013 Chemical analyses were conducted to determine the qualitative and quantitative differences in monoterpenes and sesquiterpenes in plant material from avocado trees, Persea americana Mill. (Lauraceae). The initial study analyzed plant material sampled from
Jerome Niogret +5 more
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Generation, Ranking and Unranking of Ordered Trees with Degree Bounds [PDF]
Electronic Proceedings in Theoretical Computer Science, 2016 We study the problem of generating, ranking and unranking of unlabeled ordered trees whose nodes have maximum degree of Δ. This class of trees represents a generalization of chemical trees. A chemical tree is an unlabeled tree in which no node has degree
Mahdi Amani, Abbas Nowzari-Dalini
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Chemical thinning of 'BRS Kampai' peach trees [PDF]
Pesquisa Agropecuária Brasileira, 2019 : The objective of this work was to evaluate the effect of thinning with metamitron on the fruit yield and quality of 'BRS Kampai' peach (Prunus persica) trees.
Roseli de Mello Farias +5 more
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Energy and Chemicals from Trees [PDF]
Science, 1982 A brief overview of the potential of forest biomass to produce energy and chemicals is presented. Recent developments in tree improvement, delignification and enzymatic hydrolysis are discussed in the context of increased potential and utilization of wood.
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Horticulturae, 2022 Priming involves the exposure of plants to a mild stress to increase tolerance to a more intense stress in the future. Chemical priming with brassinosteroids reduces the negative effects of flooding on the physiology and survival of some plant species ...
Melinda H. Yin +3 more
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