CHEMISTRY: Gaining Support Openly

Gaining retention, support and stability of a maxillary obturator.

Construction of a maxillectomy obturator for any surgical defect requires optimum retention, stability and obturation of defect. In the following case a closed hollow bulb obturator was constructed while utilizing surveying and neutral zone impression technique. After insertion, soft liner was applied to record functional impression of the surgical defect. The obturator was resurfaced with heat...

Database Support for Computational Chemistry

Database support for computational chemistry

In common with other computational science applications, computational chemistry applications have the need both for increasing the speed of calculations and for storing and viewing large amounts of specialized information. This paper addresses the latter of these two needs: a review of current literature in scientific data management shows computational chemistry to be fairly typical among sci...

A new method for gaining insight into the chemistry of drying mineral surfaces using ATR-FTIR.

Although it is understood that the chemical environment at a drying surface is likely to be quite different from that at a fully hydrated surface, the difficulty of quantitative measurement has meant that this potentially crucial aspect of surface chemistry has gone largely overlooked. As a result, most of our understanding comes from measurement before and after drying, with a gray region of s...

The number of openly generated Boolean algebras

This article is devoted to two different generalizations of projective Boolean algebras: openly generated Boolean algebras and tightly σ-filtered Boolean algebras. We show that for every uncountable regular cardinal κ there are 2 pairwise non-isomorphic openly generated Boolean algebras of size κ > א1 provided there is an almost free non-free abelian group of size κ. The openly generated Boolea...