background: the effects of estrogene on central nervous system are still controversial. objective: we aimed to investigate the effects of raloxifene on the antioxidant enzyme [superoxide dismutase (sod) and catalase (cat)] activities and malondialdehyde (mda) levels in brain homogenates of ovariectomized female rats and its effect on cognitive process of learning. materials and methods: female ...

The mol-ecule of the title compound, C(14)H(12)ClN(3)OS, consists of three approximately planar fragments: the central thio-urea group, the chloro-phenyl group and the picolyl (3-methyl-pyridin-2-yl) group with a maximum of 0.035 (2)° for an N atom from the mean square plane of the central thiourea group. The central fragment forms dihedral angles of 33.30 (8) and 76.78 (8)° with the chloro-phe...

In this paper, we introduce the based and unbased n-Spanier groups n-semilocally simply connected spaces, investigate their relationship. We show that under some conditions, vanishing of group with respect to an open cover is equivalent n-semilocal simple connectivity space, vice versa.

In this paper, we consider the finitely 2-generated groups $K(s,l)$ and $G_m$ as follows:$$K(s,l)=langle a,b|ab^s=b^la, ba^s=a^lbrangle,\G_m=langle a,b|a^m=b^m=1, {[a,b]}^a=[a,b], {[a,b]}^b=[a,b]rangle$$ and find the explicit formulas for the probability of having nth-roots for them. Also, we investigate integers n for which, these groups are n-central.

A group G is said to be n-centralizer if its number of element centralizers $$\mid {{\,\mathrm{Cent}\,}}(G)\mid =n$$ , an F-group every non-central centralizer contains no other and a CA-group all are abelian. For any non-abelian G, we prove that \frac{G}{Z(G)}\mid \le (n-2)^2$$ $$n 12$$ 2(n-4)^{{log}_2^{(n-4)}}$$ otherwise, which improves earlier result. We arbitrary F-group, then gcd $$(n-2, ...

background: multiple sclerosis (ms) is an autoimmune,  neuro- inflammatory disease  of  central nervous system affecting physical, emotional, and cognitive aspects of patients. association of vitamin d deficiency and ms has been shown in previous studies. the aim of this study was to evaluate serum vitamin d level in ms cases and their sex-matched healthy siblings (who are genetically near simi...