The new ternary amalgam CsNa2Hg18 was synthesised from the elements in an unconventional low-temperature procedure. It crystallises a tetragonal structure type (space group I4/mmm, = 7.3054(7) and c 20.046 Å) combines ionic metallic bonding contributions. In crystal structure, Cs Na atoms are embedded Hg scaffold with highly covalent Hg–Hg bonding. alkali metal coordinated exclusively by unusua...

AIM The aim of this study was to investigate the effect of 16 percent carbamide peroxide gel on mercury and silver ions released from admixed and spherical dental amalgams. METHODS AND MATERIALS A total of 96 amalgam discs were prepared from two different types and brands of dental amalgam (admixed and spherical). The samples were stored at room temperature in glass tubes containing distilled...

objective: bleaching of the teeth is considered as a safe, effective, and conservative procedure to treat discolored teeth. the aim of the present study was to compare the amount of mercury and silver released from amalgam after applying two brands of carbamide peroxide 16% bleaching gel. materials and methods: for this experimental study, 384 amalgam tablets were prepared. the samples were kep...

For many groups the structure of finitely generated subgroups is generically simple. That is with asymptotic density equal to one a randomly chosen finitely generated subgroup has a particular well-known and easily analyzed structure. For example a result of D. B. A. Epstein says that a finitely generated subgroup of GL(n,R) is generically a free group. We say that a group G has the generic fre...

Informally, an amalgam is a group ‘sitting inside’ two other groups and the coset graph is a way to look at how the cosets of subgroups interact. These are combined in the amalgam method — a way of classifying amalgams satisfying certain conditions. The amalgam method was used in the classifications of finite simple groups, and is discussed in Classification of Finite Simple Groups no. 2 by Gor...

(i.i) ll/IU=( t \ n » — oo makes (L9 l ) into a Banach space. The idea of considering the amalgam (L, l\ as opposed to the Lebesgue space L = (L,l), is a natural one because it allows us to separate the global behavior from the local behavior of a function. This idea goes back to 1926 and Norbert Wiener who considered the special cases (L,1) and (L, l°°) in [Wl] and (L°°, I) and (L\ l°°) in [W2...