The present study determined the effect of organically quaternizing either of the two tertiary nitrogen sites of nicotine to assess the in vivo effects of the permanently ionized states of the synthesized N-[14C]methylnicotines on brain uptake in rat . . .

The proton hyperfine coupling constants in a series of n-alkyl chains with a doxyl group attached at various points from the end of the chain have been measured by NMR and EPR spectroscopies. The hyperfine structure shows no further change when the at . . .

EPR spectra of aqueous solutions of the singly charged surfactant nitroxide 4-[N,N-dimethyl-N-(n-dodecyl)ammonium]-2,2,6,6-tetramethylpiperidinyl-N-oxy bromide-d16 (DCAT12) are studied as functions of the molar concentration, c = 0.1−8 mM, and the tem . . .