Results 11 to 20 of about 527,105 (289)
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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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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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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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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Chemical thinning of peach trees
Comunicata Scientiae, 2022 Peach tree thinning is essential to harvest quality fruits and to keep balanced production for several years. Manual thinning of peach trees demands much work force and increases production costs. Chemical thinning may be an alternative solution, but efficiency depends on doses and species.
Roseli De Mello Farias +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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Mixed-Integer Convex Nonlinear Optimization with Gradient-Boosted Trees Embedded [PDF]
, 2019 Decision trees usefully represent sparse, high dimensional and noisy data. Having learned a function from this data, we may want to thereafter integrate the function into a larger decision-making problem, e.g., for picking the best chemical process ...
Krennrich, Gerhard +4 more
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Chemical trees enumeration algorithms
Quarterly Journal of the Belgian, French and Italian Operations Research Societies, 2003 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
ARINGHIERI, ROBERTO +2 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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