We show how the tribofilm growth rate of zinc dialkyldithiophosphate (ZDDP) changes for different alkyl substitutents under carefully controlled temperature and stress conditions.

BACKGROUND Electronic properties of amino acid side chains such as inductive and field effects have not been characterized in any detail. Quantum mechanics (QM) calculations and fundamental equations that account for substituent effects may provide insight into these important properties. PM3 analysis of electron distribution and polarizability was used to derive quantitative scales that descri...

Of the utmost importance of chirality in organic compounds and drugs, present work reports structure-chirality relationship three steroidal quinoxalines, which were synthesised by condensing diaminobenzenes with cholestenone. All purified characterised varying analytical tools prior to their chiroptical analysis circular dichroism (CD) technique. The substituent groups on quinoxalines contribut...