Results 91 to 100 of about 3,443,471 (241)
Silver Doping Mechanism in Bioceramics—From Ag+:Doped HAp to Ag°/BCP Nanocomposite
Crystals, 2019 The results presented in this paper, based on the powder X-ray diffraction technique followed by Rietveld analyses, are devoted to the mechanism of silver incorporation in biphasic calcium phosphates. Results were confirmed by SEM observation.
Aurélie Jacobs +3 more
doaj +1 more source
$σ$-Relations, $σ$-functions and $σ$-antifunctions [PDF]
arXiv, 2009 In this article we develop the concepts of $\sigma$-relation and $\sigma$-function, following the same steps as in Set Theory. First we define the concept of ordered pair and then we build the Cartesian Product of $\sigma$-sets so that we can define the concepts of $\sigma$-relation and $\sigma$-function.
arxiv
Structure of the Sigma-Phase in the Iron–Chromium and Cobalt–Chromium Systems [PDF]
, 1951 G. J. Dickins +2 more
openalex +1 more source
Journal of Karnali Academy of Health Sciences, 2023 Introduction: Toilet training if not trained can leads the children to experience psychological problems. Mother’s alertness plays a very important role in toilet training which is vital for the better growth and development of a child.
Sigma Bhattarai, Chet Kant Bhusal
doaj
, 2014 Aleatory variability in ground‐motion prediction, represented by the standard deviation (sigma) of a ground‐motion prediction equation, exerts a very strong influence on the results of probabilistic seismic‐hazard analysis (PSHA).
A. Rodriguez-Marek +4 more
semanticscholar +1 more source
On integers $n$ for which $σ(2n+1)\geq σ(2n)$ [PDF]
arXiv, 2019 We show that the natural density of positive integers $n$ for which $\sigma(2n+1)\geq \sigma(2n)$ is between $0.053$ and $0.055$.
arxiv
, 1994 For random variables with a unimodal Legesgue density, the 3[sgrave] rule is proved by elementary calculus. It emerges as a special case of the Vysochanskiĭ-Petunin inequality, which in turn is based on the Gauss inequality.
F. Pukelsheim
semanticscholar +1 more source
Chromatic number of signed graphs with bounded maximum degree [PDF]
arXiv, 2016 A signed graph $ (G, \Sigma)$ is a graph positive and negative ($\Sigma $ denotes the set of negative edges). To re-sign a vertex $v$ of a signed graph $ (G, \Sigma)$ is to switch the signs of the edges incident to $v$. If one can obtain $ (G, \Sigma')$ by re-signing some vertices of $ (G, \Sigma)$, then $ (G, \Sigma) \equiv (G, \Sigma')$. A signed
arxiv
Formation of Sigma Phase in the Mn-Mo System [PDF]
, 1953 B. F. Decker +2 more
openalex +1 more source
Acetyl-L-carnitine flux to lipids in cells estimated using isotopomer spectral analysis
Journal of Lipid Research, 1997 Acetyl-L-carnitine is known as a reservoir of activated acetyl units and as a modulator of metabolic function. The objective of this study was to quantify the fate of the acetyl moiety of acetyl-L-carnitine in lipogenic pathways.
L Lligona-Trulla +4 more
doaj