Results 91 to 100 of about 351,850 (226)

Potentiometric investigation of acid-base equilibria of two newv pyrimidine derivatives in various methanol–water media [PDF]

open access: yesJournal of the Serbian Chemical Society, 2006
The acid-base properties of 1-amino-5-benzoyl-4-phenyl-1H-pyrimidine-2-one (L1) and 1-amino-5-benzoyl-4-phenyl-1H-pyrimidine-2-thione (L2) were investigated potentiometrically at an ionic strength of 0.10M(LiCl) in 19.8, 33.6 and 55.9 % (v/v) methanolâ ...
HASAN KILIÇ, BİROL ER
doaj  

Fields of rational constants of cyclic factorizable derivations

open access: yesElectronic Journal of Differential Equations, 2015
We describe all rational constants of a large family of four-variable cyclic factorizable derivations. Thus, we determine all rational first integrals of their corresponding systems of differential equations.
Janusz Zielinski
doaj  

Rate and equilibrium constants for oxazolidine and thiazolidine ring-opening reactions [PDF]

open access: bronze, 1996
Moisés Canle   +3 more
openalex   +1 more source

Model compounds of humic acid and oxovanadium cations. Potentiometric titration and EPR spectroscopy studies

open access: yesJournal of the Brazilian Chemical Society, 1999
The stability constants and the isotropic EPR parameters Ao (hyperfine splitting constant) and g o (g value) were obtained by potentiometric titrations and EPR spectroscopy, respectively, of 85%v/v aqueous solutions of model compounds of humic acids ...
Mercê Ana Lucia Ramalho   +4 more
doaj  

What problems do local habitat change represent for the constant effort site ringing scheme? [PDF]

open access: bronze, 2000
N. M. Harrison   +3 more
openalex   +1 more source

Resorcinol-, catechol- and saligenin-based bronchodilating β2-agonists as inhibitors of human cholinesterase activity

open access: yesJournal of Enzyme Inhibition and Medicinal Chemistry, 2017
We investigated the influence of bronchodilating β2-agonists on the activity of human acetylcholinesterase (AChE) and usual, atypical and fluoride-resistant butyrylcholinesterase (BChE). We determined the inhibition potency of racemate and enantiomers of
Anita Bosak   +4 more
doaj   +1 more source

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