Results of the study of M 2 I ·M II ·L 2 ·NH 2 O type citrates

O + + H 2 O „ + M ... \ H 5 O 2 + „ + M ...

مطالعه شونیت های کروماتی M M (Cro ) 6،H O M = NH ,Rb ,Cs ,…, M =Mg ,Ni ,…

Pseudocyclic association schemes arising from the actions of PGL ( 2 , 2 m ) and P L ( 2 , 2 m )

The action of PGL(2,2m) on the set of exterior lines to a nonsingular conic in PG(2,2m) affords an association scheme, which was shown to be pseudocyclic in [H.D.L. Hollmann, Association schemes, Master thesis, Eindhoven University of Technology, 1982]. It was further conjectured in [H.D.L. Hollmann, Association schemes, Master thesis, Eindhoven University of Technology, 1982] that the orbital ...

2 8 M ay 2 00 4 Critical behavior of O ( 2 ) ⊗ O ( N ) symmetric models

We investigate the controversial issue of the existence of universality classes describing critical phenomena in three-dimensional statistical systems characterized by a matrix order parameter with symmetry O(2)⊗O(N) and symmetry-breaking pattern O(2)⊗O(N)→O(2)⊗O(N − 2). Physical realizations of these systems are, for example, frustrated spin models with noncollinear order. Starting from the fi...

Synthesis and Luminescent Properties of M 2 V 2 O 7 : Eu ( M 0 Sr , Ba )

A solution combustion route for the synthesis of Eu-activated M2V2O7 (M 0 Sr, Ba) and their luminescent properties have been investigated. Structure and luminescent characteristics of Sr2V2O7:Eu 3+ and Ba2V2O7:Eu 3+ nanophosphors have been studied by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, fluorescence spectrometry and Fourier transform infra-red spect...