Results 21 to 30 of about 3,063,668 (282)
The Graphs Whose Permanental Polynomials Are Symmetric
Discussiones Mathematicae Graph Theory, 2018 The permanental polynomial π(G,x)=∑i=0nbixn−i$\pi (G,x) = \sum\nolimits_{i = 0}^n {b_i x^{n - i} }$ of a graph G is symmetric if bi = bn−i for each i. In this paper, we characterize the graphs with symmetric permanental polynomials.
Li Wei
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Root Architecture and Plant Productivity [PDF]
Plant Physiology, 1995 Water and nutrient availability limit plant growth in a11 but a very few natural ecosystems. They limit yield in most agricultural ecosystems, and in the United States and other industrialized nations, intensive irrigation and fertilization have generated serious environmental problems.
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Products of Orthophosphate Absorption by Barley Roots [PDF]
Plant Physiology, 1960 The rate-limiting step of orthophosphate absorption by barley roots has been shown by kinetic studies (5) to be coupled to two of the sites of oxidative phosphorylation associated with isolated mitochondria. One of the reactions is coupled to reduced cytochrome b and the other to reduced diphosphopyridine nucleotide (DPNH).
P C, Jackson, C E, Hagen
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On Sackin’s original proposal: the variance of the leaves’ depths as a phylogenetic balance index
BMC Bioinformatics, 2020 Background The Sackin index S of a rooted phylogenetic tree, defined as the sum of its leaves’ depths, is one of the most popular balance indices in phylogenetics, and Sackin’s paper (Syst Zool 21:225–6, 1972) is usually cited as the source for this ...
Tomás M. Coronado +3 more
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Pluralismo giuridico e pratica giuridica indigena: il caso dei Guaranì del Chaco Boliviano
EtnoAntropologia, 2017 This article ethnographically explores the form and the content of juridical practices of Guarani people living in the Capitanías of Charagua Norte and Alto Isoso, Bolivia. Starting from the Bolivian legal pluralism main field and through the analysis of
Francesca Scionti
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VERTEX-ECCENTRICITY DESCRIPTORS IN DENDRIMERS
Studia Universitatis Babes-Bolyai Chemia, 2017 In this paper, we present graph theoretical methods to compute several vertex-eccentricity-based molecular descriptors such as the eccentric connectivity index, total eccentricity, average eccentricity and first and second Zagreb eccentricity indices ...
Mahdieh AZARI +2 more
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An evaluation method for product design solutions for healthy aging companionship
Frontiers in Public Health, 2022 BackgroundWith the development trend of healthy aging and intelligent integration, escort products have become a new means of healthy aging. Healthy old-age care pays attention to the convenience and informatization of life.
Shan Hu +5 more
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Open-design: A state of the art review
Design Science, 2018 The ‘open approach’ is rooted in the open-source and free-software movements. Its application has spread to more fields than computer engineering.
Étienne Boisseau +2 more
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Computing the Metric Dimension of a Graph from Primary Subgraphs
Discussiones Mathematicae Graph Theory, 2017 Let G be a connected graph. Given an ordered set W = {w1, . . . , wk} ⊆ V (G) and a vertex u ∈ V (G), the representation of u with respect to W is the ordered k-tuple (d(u, w1), d(u, w2), . . .
Kuziak Dorota +2 more
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Role of root microbiota in plant productivity [PDF]
Journal of Experimental Botany, 2015 The growing human population requires increasing amounts of food, but modern agriculture has limited possibilities for increasing yields. New crop varieties may be bred to have increased yields and be more resistant to environmental stress and pests. However, they still require fertilization to supplement essential nutrients that are normally limited ...
Tkacz, A, Poole, P
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