• Molecules
  • Isomerism , the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties. (britannica.com)
  • Electromerism is a type of isomerism between a pair of molecules (electromers, electro-isomers) differing in the way electrons are distributed among the atoms and the connecting chemical bonds. (wikipedia.org)
  • One group of electromers are excited electronic states but isomerism is usually limited to ground state molecules. (wikipedia.org)
  • The idea of residual topological isomerism introduces a handy scheme of modifying the molecular graphs and generalizes former efforts of systemization of mechanically bound and bridged molecules. (wikipedia.org)
  • isomers
  • Since positional isomerism affects strongly its potency in inhibiting colon cancer cell growth, we studied the metabolic transformations of its ortho -, meta -, and para -isomers in rat liver and colon cytosolic, microsomal, and mitochondrial fractions as well as in intact HT-29 human colon cancer cells. (aspetjournals.org)
  • Thus, the three positional isomers of NO-ASA differ in their metabolism and these differences correlate with their differential effects on cancer cell growth, underscoring the importance of positional isomerism in modulating drug effects. (aspetjournals.org)
  • symmetry
  • The term 'isomerism,' derived from Greek ( iso, meaning 'equal,' and meros , meaning 'part'), refers to this abnormal developmental symmetry in which morphologic structures that normally develop on one side or the other of the body are found on both sides of the body, and is the currently accepted term used to describe hearts with isomeric atria and atrial appendages [ 1 ]. (uptodate.com)
  • different
  • It has estimated that a polypeptide of M r 34000, built from 12 different amino acids can have 10 300 different sequences, now that's what you call isomerism! (docbrown.info)