Reference

Effects of trivalent phosphorus compounds on vinyl polymerizations

Effects of trivalent phosphorus compounds on vinyl polymerizations. V. Effects of solvents and tetraethylammonium bromide on the anionic polymerization of acrylonitrile initiated by triethyl phosphite. Ogawa, Takeshi; Romero, Jaime (Dep. Quim., Univ. Autonoma Guadalajara, Guadalajara, Mexico). Eur. Polym. J., 13(5), 419-21 (English) 1977. CODEN: EUPJAG. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) In n-hexane, benzene, 1,4-dioxane, THF, MeCN, and DMF the initial rate of polymn. of CH2:CHCN [107-13-1] by (EtO)3P [122-52-1] increased but the d.p. decreased with increase in solvent polarity, except for hexane and DMF. Et4NBr [71-91-0] caused an increase in polymn. rate, which was attributed to exchange of countercation between Et4N+ and (EtO)3P+. Addn. of Et4NBr also decreased the order with respect to monomer for polymn. in MeCN. The polymn. in DMF was approx. 2nd order with respect to monomer, independently of the added ions.

Tetraethylammonium-methohexitone-induced contractures and miniature end-plate potential discharge in the chick biventer cervicis muscle

Tetraethylammonium-methohexitone-induced contractures and miniature end-plate potential discharge in the chick biventer cervicis muscle. Elliott, R. C. (Dep. Appl. Biol., Brunel Univ., Uxbridge UB8 3PH, UK). Gen. Pharmacol., 17(6), 655-9 (English) 1986. CODEN: GEPHDP. ISSN: 0306-3623. DOCUMENT TYPE: Journal CA Section: 1 (Pharmacology) Section cross-reference(s): 13 End-plate potentials (EPP) and miniature end-plate potentials (MEPP) were recorded in the chick biventer cervicis muscle in vitro. The control frequency of discharge of MEPPs was 5.97 min-1. Methohexitone [151-83-7] (8.8 ′ 10-5 M) did not affect the frequency of MEPP discharge, but tetraethylammonium bromide (TEA) [71-91-0] (2.4-9.5 mM), reduced the frequency to 32.9% of the control. In the presence of neostigmine (3.3 ′ 10-6 M), methohexitone (8.8 ′ 10-5 M) reduced MEPP frequency to 38.7% of the control and TEA (2.4-9.5 mM) further reduced the frequency to 8.7% of the control. After a transient facilitation of the EPP, TEA (2.4-9.5 mM) in the presence of methohexitone (8.8 ′ 10-5 M) and neostigmine (3.3 ′ 10-6M) markedly reduced EPP amplitude. The contractures which TEA produced in the presence of methohexitone were not due to an increase in the spontaneous release of vesicular acetylcholine [51-84-3].