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This paper describes a method for determining EDTA species in various environmental samples at low molar concentrations by high-performance liquid chromatography (HPLC). Distinction between Fe(III)EDTA and all the other species can be made. NiEDTA can be detected semiquantitatively. The fraction of EDTA adsorbed to suspended particles or to sediments can be(More)
In this article, we construct stochastic integral and stochastic differential equations on general time scales. We call these equations stochastic dynamic equations. We provide the existence and uniqueness theorem for solutions of stochastic dynamic equations. The crucial tool of our construction is a result about a connection between the time scales(More)
In this paper, we consider the third-order nonlinear neutral delay dynamic equations n B(t) ˆ A(t) ` y(t) + p(t)y(τ (t)) ´ ∆ ˜ ∆ o ∆ + Z b a F (t, ξ, y(g(t, ξ))) ∆ξ = 0, on an arbitrary time scale T which is unbounded above. We establish some sufficient conditions which ensure that every solution of the above equations oscillates or converges to zero. To(More)
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