A new synthesis of 4-[(prop-2-en-1-yloxy)methyl]-1,3-dioxolan-2-one (AGC) was performed by Williamson ether synthesis from 4-(hydroxymethyl)-1,3-dioxolan-2-one. Dicyclocarbonates were synthesized by UV thiol–ene coupling of allyl-cyclocarbonate with a 2,2 0-oxydiethanethiol. This photochemical thiol–ene reaction was carried out under air, with neither… (More)
Canards are solutions of slow-fast systems that spend long times near branches of repelling equilibria, periodic orbits, or higher-dimensional invariant sets. Here, we report on the observation of a new type of canard orbit, labeled a canard of mixed type. This canard orbit is a hybrid of the classical limit cycle canards, which spend long times near… (More)
Isolated cells can be kept in steady-state conditions for very long periods of time when inserted into dialysis microfibers and perifused with a nutrient-containing solution. Using this system, stable 31P NMR spectra have been obtained on dog kidney tubules for a period of 13 h.