Results 81 to 90 of about 4,479,442 (268)
The Canadian Journal of Chemical Engineering, EarlyView.Timeline of key academic milestones and individuals that shaped chemical engineering at FQ‐UNAM and in Mexico. Abstract One hundred years after the beginning of the teaching of Chemical Engineering in Mexico, which started in 1925 in the former National School of Chemical Sciences, currently Faculty of Chemistry (FQ) at National Autonomous University ...
Patricia Pérez‐Salinas +2 more
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Risk assessment using IEUBK model for the Naica mine tailings
Environmental Progress &Sustainable Energy, EarlyView.Abstract Mexico has a long history of mineral extraction, during which limited environmental regulations allowed the accumulation of toxic waste near communities, primarily in rural or undeveloped areas. Some of these toxic substances, such as lead, pose significant risks to vulnerable populations, particularly children aged 0 to 7 years.
A. Contreras‐Guardiola +4 more
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Estimating the distance Estrada index
Kuwait Journal of Science, 2016 Suppose $G$ is a simple graph on $n$ vertices. The $D$-eigenvalues$\mu_1,\mu_2,\cdots,\mu_n$ of $G$ are the eigenvalues of itsdistance matrix. The distance Estrada index of $G$ is defined as$DEE(G)=\sum_{i=1}^ne^{\mu_i}$.
Yilun Shang
doaj
On the Estrada Index of Point Attaching Strict k-Quasi Tree Graphs
, 2020 Let G = (V,E) be a finite and simple graph with λ1, λ2, . . . , λn as its eigenvalues. The Estrada index of G is EE(G) = ∑n i=1 e λi . For a positive integer k, a connected graph G is called strict k-quasi tree if there exists a set U of vertices of size
M. Iranmanesh, R. Nejati
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Food Chemistry International, EarlyView.(A) Mount number, (B) mount latency, (C) intromission number, and (D) intromission latency are the parameters of sexual behavior. Met = metformin. D100 = 100 Donkwa. D90G10 = 90% Donkwa + 10% Goron‐Tula. D85G15 = 85% Donkwa + 15% Goron‐Tula. D80G20 = 80% Donkwa + 20% Goron‐Tula. The mean ± standard error of the mean (SEM) expressed the results. *Values
O. T. Mamukuyomi +2 more
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On Topological Indices of OT [m, n] Octagonal Tillings and TiO2 Nanotubes
Acta Chimica Slovenica, 2019 Some well defined connectivity topological indices are Randic index, atom-bond connectivity index, geometric-arithmetic index and Shigehalli & Kanabur indices, brought into light by M. Randic, Estrada et al, Vukicevic et al and V. S. Shigehalli, in their
Hafiz Usman Afzal, Tahzeeb Fatima
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Food Chemistry International, EarlyView.The graphical abstract represents how natural plant products that preferentially target the specific receptors of quorum sensing could be developed to combat biofilms linked to Yersinia enterocolitica using the potent abilities of protein–ligand complexes with high docking scores.
Rajendran Thomas +7 more
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Graphs with Clusters Perturbed by Regular Graphs—Aα-Spectrum and Applications
Discussiones Mathematicae Graph Theory, 2020 Given a graph G, its adjacency matrix A(G) and its diagonal matrix of vertex degrees D(G), consider the matrix Aα (G) = αD(G) + (1 − α)A(G), where α ∈ [0, 1).
Cardoso Domingos M. +2 more
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More on the Laplacian Estrada index
Applicable Analysis and Discrete Mathematics, 2009 Let G be a graph with n vertices and let ?1, ?2, . . . , ?n be its Laplacian eigenvalues. In some recent works a quantity called Laplacian Estrada index was considered, defined as LEE(G)?n1 e?i. We now establish some further properties of LEE, mainly upper and lower bounds in terms of the number of vertices, number of edges, and the first Zagreb index.
Bo Zhou, Ivan Gutman
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The Effect of the Interaction Between Price and Time Preference on Cigarette Consumption
International Studies of Economics, EarlyView.ABSTRACT The primary focus of this essay is to obtain new estimates of the price sensitivity of cigarette consumption and related outcomes using the 1979 cohort of the National Longitudinal Survey of Youth (NLSY79). This work expands on the existing literature on the topic by taking into account measures of time preference in the NLSY79 to examine ...
Yan Song
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