Results 31 to 40 of about 796,772 (273)

Retention behaviour of some estradiol derivatives on alumina in normal phase chromatrography [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
The retention constants of variously substituted estradiol derivatives were measured as a function of the composition of various binary mobile phases in order to study the relationship between chemical structure and retention behavior in TLC on alumina ...
Ačanski Marijana M.
doaj   +1 more source

Thermodynamic Consistency of the Cushman Method of Computing the Configurational Entropy of a Landscape Lattice

open access: yesEntropy, 2021
There has been a recent surge of interest in theory and methods for calculating the entropy of landscape patterns, but relatively little is known about the thermodynamic consistency of these approaches.
Samuel A. Cushman
doaj   +1 more source

Decomposable graphs and definitions with no quantifier alternation [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2005
Let $D(G)$ be the minimum quantifier depth of a first order sentence $\Phi$ that defines a graph $G$ up to isomorphism in terms of the adjacency and the equality relations. Let $D_0(G)$ be a variant of $D(G)$ where we do not allow quantifier alternations
Oleg Pikhurko   +2 more
doaj   +1 more source

Retention behaviour of acyclic polyfunctional D-arabinose derivatives [PDF]

open access: yesActa Periodica Technologica, 2002
It is well known that some of biologically active compounds are chiral molecules. Natural monosaccarides are applicable as chiral precursors. D-arabinose is an appropriate chiral precursor in the synthesis of very important biomolecules such as biotin ...
Kolarov Ljiljana A.   +2 more
doaj   +1 more source

Depth-Optimization of Quantum Cryptanalysis on Binary Elliptic Curves

open access: yesIEEE Access, 2023
This paper presents quantum cryptanalysis for binary elliptic curves from a time-efficient implementation perspective (i.e., reducing the circuit depth), complementing the previous research that focuses on the space-efficiency perspective (i.e., reducing
Dedy Septono Catur Putranto   +4 more
doaj   +1 more source

Research on Odor Interaction between Aldehyde Compounds via a Partial Differential Equation (PDE) Model

open access: yesSensors, 2015
In order to explore the odor interaction of binary odor mixtures, a series of odor intensity evaluation tests were performed using both individual components and binary mixtures of aldehydes.
LuchunYan   +4 more
doaj   +1 more source

Development of Sequential Sampling Plan for Bacterial Leaf Blight of Garlic by Cluster Sampling

open access: yesResearch in Plant Disease, 2015
Bacterial leaf blight caused by Pseudomonas syringae pv. porri is one of the major bacterial diseases of garlic (Allium sativum). In South Korea, the disease has only been observed in garlic-growing regions of Jeju island.
Jeong Heub Song   +3 more
doaj   +1 more source

On the asymptotic behavior of Shannon-type functions characterizing the computing complexity of systems of monomials

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2020
In this paper, we examined the computational complexity of systems of monomials for some models that allow multiple use of intermediate results, such as composition circuits and multiplication circuits.
S.A. Korneev
doaj   +1 more source

The Mantel-Haenszel procedure revisited: models and generalizations. [PDF]

open access: yesPLoS ONE, 2013
Several statistical methods have been developed for adjusting the Odds Ratio of the relation between two dichotomous variables X and Y for some confounders Z.
Vaclav Fidler, Nico Nagelkerke
doaj   +1 more source

Paper ionophoretic technique in the study of biologically important beryllium(II) / cobalt(II)-homoserine binary complexes in solution

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2010
Quantitative indication of the process of forming a complex comes from the evaluation of the stability constants, which characterize the equilibria corresponding to the successive addition of ligands.
Brij Bhushan Tewari
doaj   +1 more source

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