Resolution of Optical Isomers by Gas Liquid Partition Chromatography

  title={Resolution of Optical Isomers by Gas Liquid Partition Chromatography},
  author={E. Gil-av and Rosita Charles-Sigler and G Fischer and David Nurok},
  journal={Journal of Chromatographic Science},
Purification, Stereoisomeric Analysis and Quantification of Biologically Active Compounds in Extracts from Pine Sawflies, African Butterflies and Orchid Bees
Stereochemistry plays an important role in nature because biologically important molecules such as amino acids, nucleotides and sugars, only exist in enantiomerically pure forms. Semiochemicals car
Stereoselective aminoacylation of a dinucleoside monophosphate by the imidazolides ofDl-alanine and N-(tert-butoxycarbonyl)-Dl-alanine
Reaction of IpI with the imidazolide of unprotectedDl-alanine led to an excess of theD isomer at the internal 2′ site, while reaction with the N-carboxy anhydride ofDl -alanine proceeded without detectable stereoselection.
Present status of enantiomeric analysis by gas chromatography
  • E. Gil-av
  • Materials Science
    Journal of Molecular Evolution
  • 2005
The development of selective chiral solute-solvent systems showing separation of enantiomers by gas chromatography is reviewed and some recent results with the highly efficient diamide phases, which permit resolution on packed columns, are presented.
Racemization of aspartic acid in the extracellular matrix proteins of primary and secondary dentin
The accumulation with age ofd-aspartic acid in primary and secondary human dentin was determined and the secondary dentin behaved in an irregular manner and showed, in the great majority of cases, significantly increasedd/l Asp ratios.
Extraterrestrial organic analysis
  • J. Oró
  • Physics, Geology
    Space life sciences
  • 2004
An attempt is made to answer fundamental questions of organic cosmochemistry - namely, the nature of the organic and related molecules present in the authors' Galaxy and solar system, the distribution of these molecules in different parts of the two systems, the mechanism of formation ofThese molecules, and the relation between these molecules and prebiological chemical evolution on the one hand, and terrestrial and, possibly, extraterrestrial biology on the other.
Racemization of aspartic acid in human articular cartilage.
Results indicate that there is only a very slow collagen turnover in normal adult cartilage, and the same is true of residual cartilage from osteoarthritic femoral heads, indicating no rapid repair except where osteophytes are formed.