New resolving bases for ibuprofen and mandelic acid: qualification by binary phase diagrams

New resolving bases for ibuprofen and mandelic acid: qualification by binary phase diagrams

New resolving bases for ibuprofen 1 and mandelic acid 2 were studied and qualified by their binary phase diagrams of the corresponding salts. It was shown that analysis of the binary phase diagrams gives a good prediction for a resolution process. A comparison of resolving bases revealed that (S)-phenylglycinol (S)-7 is the best resolving base for ibuprofen 1. By the same procedure, various res...

Ordered Binary Decision Diagrams as Knowledge-Bases

Crystal-liquid crystal binary phase diagrams.

We propose a new theoretical scheme for the binary phase diagrams of crystal-liquid crystal mixtures by a combination of a phase field model of solidification, the Flory-Huggins theory for liquid-liquid mixing and Maier-Saupe-McMillan (FH-MSM) model for nematic and smectic liquid crystal orderings. The phase field theory describes the crystal phase transition of anisotropic organic crystal and/...

Diagrams for Positive Bases

The theory of positive bases is a useful tool in the study of convexity. In this paper we describe a representation of a positive basis of a finite-dimensional linear space, which is analogous to that of a poly tope by a Gale diagram (see [4, §5.4 and §6.3; 7, Chapter 3]). The basic idea is implicit in the work of Chandler Davis [2] but, as we now have the advantage of experience in the use of ...

Binary Decision Diagrams by Shared

BDDs provide an established technique for propositional formula manipulation. In this paper we re-develop the basic BDD theory using standard rewriting techniques. Since a BDD is a DAG instead of a tree we need a notion of shared rewriting and develop appropriate theory. A rewriting system is presented by which canonical ROBDDs can be obtained. For this rewriting system a layerwise strategy is ...