Objectives: Manufacturing and spraying workers of organophosphate pesticides (OPs) could suffer from testicular spermogenesis and steroidogesis dysfunctions particularly when their degradation is subnormal. Aim: Exploration of spermatogenic and endocrinologic testicular functions and paraoxonase/arylesterase (PON1/ARY) degrading activities of the organophosphate parathion and its oxon in their ...

In this paper, we determine the expectation and variance of Xn the external path length in a random recursive k-ary tree of size n.

Abstract Using the vectors and symmetry of affine geometry induced by ternary quasigroup satisfying para-associative laws, we found conditions under which such becomes a group. The obtained results also give simple characterization semiabelian n -ary groups.

In this paper $n$-ary regular division algebras are discussed, which satisfying the hyperidentity of paramediality. It is shown that every operation in paramedial algebra will be linearly represented over same Abelian group. Similar results already obtained for medial [1].

A fundamental problem in the theory of n-ary algebras is to determine the correct generalization of the Jacobi identity. This paper describes some computational results on this problem using representations of the symmetric group. It is well known that over a field of characteristic 0 any variety of n-ary algebras can be defined by multilinear identities. In the anticommutative case, it is show...

It is established that for any q > 2 the permutation automorphism group of a q-ary Hamming code of length n = (q − 1)/(q− 1) is isomorphic to the unitriangular group UTm(q).

We prove that any IN-rational sequence s = (sn) n1 of non-negative integers satisfying the Kraft strict inequality P n1 snk ?n < 1 is the enumerative sequence of leaves by height of a rational k-ary tree. Particular cases of this result had been previously proven. We give some partial results in the equality case.

In this paper we compute the number of reduced decompositions of certain permutations ∈ Sn as a product of transpositions (1; 2), (1; 3), : : :, (1; n). We present several combinatorial correspondences between these decompositions and combinatorial objects such as Catalan paths and k-ary trees. c © 1999 Elsevier Science B.V. All rights reserved

fuzzy rough n-ary subhypergroups are introduced and characterized.