a total number of 66 chorionic villus samples were cytogenetically investigated. the samples consisted of 30 experimental cvs from spontaneously aborted materialand 36 from live gestations.80% of the samples were successfully grown, of the 30 cases 40% (12) and 33% (10)contained a normal female and a normal male karyotype, respectively, 3.3% (1) and3.3% (1) had abnormal karyotypes (47,xx, + 21;...

The Sheffer polynomials and the monomiality principle, along with the underlying operational formalism, offer a powerful tool for investigation of the properties of a wide class of polynomials. We present, within such a context, a self-contained theory of such familiar systems of polynomials as the Euler, Bernoulli, Bessel and other clasical polynomials and show how the derivation of some of th...

The moral development is a classical topic, but still insufficiently investigated in the recent studies in Romania. Our study aimed to compare the results obtained by Piaget regarding the child’s moral development with the child’s moral development corresponding to the recent cultural Romanian setting. The research method is mixed, qualitative and quantitative. The clinical interview and the sh...