Schiff bases have played significant roles in the development of inorganic or coordination chemistry. Three base (NB, CB and HB) ligands, prepared for reaction 2-amino-6-methoxy-benzothiazole with 2-Nitrobenzaldehyde, 2-chlorobenzaldehyde 2,4-Dihydroxybenzaldehyed, respectively, were investigated their transition metal complexes, which by reacting ligand (2:1 molar ratio) Co(II), Ni(II), Cu(II)...

Abstract Fisher [10] and Baur [6] showed independently in the seventies that if T is a complete first-order theory extending of modules, then class models with pure embeddings stable. In [25, 2.12], it asked same true for any abstract elementary $(K, \leq _p)$ such K modules $\leq _p$ submodule relation. this paper we give some instances where true: Theorem. Assume R an associative ring unity. ...

We study the singularly perturbed state-dependent delay-differential equation εẋ(t) = −x(t)− kx(t− r), r = r(x(t)) = 1 + x(t), (∗) which is representative of a broader class of such equations of the form εẋ(t) = g(x(t), x(t− r)), r = r(x(t)). It is known that for every sufficiently small ε > 0, equation (∗) possesses at least one so-called slowly oscillating periodic solution, and moreover, the...

Gene regulatory dynamics are governed by molecular processes and therefore exhibits an inherent stochasticity. However, for the survival of an organism it is a strict necessity that this intrinsic noise does not prevent robust functioning of the system. It is still an open question how dynamical stability is achieved in biological systems despite the omnipresent fluctuations. In this paper we i...

and Applied Analysis 3 Moreover, D. G. Bourgin 16 and Găvruţa 17 have considered the stability problem with unbounded Cauchy differences see also 18–23 . On the other hand, J. M. Rassias 24–29 considered the Cauchy difference controlled by a product of different powers of norm. However, there was a singular case; for this singularity a counterexample was given by Găvruţa 30 . Theorem 1.2 J. M. ...