Non-racemic mixture model: a computational approach.

Non-racemic mixture model: a computational approach.

The behavior of a slight chiral bias in favor of l-amino acids over d-amino acids was studied in an evolutionary mathematical model generating mixed chiral peptide hexamers. The simulations aimed to reproduce a very generalized prebiotic scenario involving a specified couple of amino acid enantiomers and a possible asymmetric amplification through autocatalytic peptide self-replication while fo...

Racemic drugs: racemic mixture, racemic compound, or pseudoracemate?

Stereochemistry can be said to have begun in 1848 when Pasteur observed that crystals of sodium ammonium tartrate obtained by slow recrystallisation at room temperature were of two mirror image crystallographic forms. He was able to pick out these two forms by hand and show that solutions of equal concentration caused an equal and opposite rotation of plane polarised light. The rotation disappe...

non-corrective approach to pronunciation

the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...

A Mixture Approach to Universal Model Selectionolivier

Effective Constitutive Characteristics of Racemic Mixture of Thin-Wire Helices

The artificial media have been of great interest in the communities of electromagnetic wave engineering including the fields of microwaves, milli-meter waves, optics etc. These are the fabricated aggregation structures composed of artificial molecules i.e. small objects which are designed to show required macroscopic electromagnetic characteristics. The sizes and spacings between the objects ar...