A series of resorcinarene host-amphiphilic guest complexes have been developed where guest orientation in the host is drastically influenced by pH. Guests appended with a trimethylammonium and a tert-butyl group switch orientation by 180° in response to a buildup of negative charge in the cavitand host.

A proteolipid protein having a high affinity for methyl (14)C-hexamethonium, (3)H-p-(trimethylammonium)-benzene diazonium fluoroborate, and (acetyl-1-(14)C)choline chloride was isolated and purified from the electric tissue of Torpedo marmorata and Electrophorus electricus. At variance with the "receptor proteolipid" from the brain the one from electric tissue apparently does not bind atropine ...

A dual-responsive supra-amphiphile was firstly constructed based on a water-soluble pillar[7]arene and a naphthalene diimide-containing guest with a long alkyl chain and a trimethylammonium group. The morphologies of the self-assembly formed from this supra-amphiphile could be adjusted by changing solution pH or adding α-cyclodextrin.

A bioassay of (2-chloroethyl)trimethylammonium chloride for possible carcinogenicity was conducted by administering the test chemical in feed to F344 rats and B6C3F1 mice. Groups of 50 rats of each sex were administered either 1,500 or 3,000 ppm of the compound for 108 weeks, and 50 mice of each sex were administered 500 or 2,000 ppm for 102 weeks. Matched controls consisted of 20 untreated and...

1. The oxidation of p-dimethylaminomethylbenzylamine was followed spectrophotometrically by measuring the change in E(250) caused by the p-dimethylaminomethylbenzaldehyde produced. 2. This reaction was inhibited by substrate analogues such as isothiouronium, guanidino, dimethylsulphonium and trimethylammonium compounds. 3. The inhibition by both mono- and bis-onium compounds has been studied an...

In the cystal structure of the title compound, (2-hy-droxy-ethyl)trimethylammonium dihydrogen phosphate, C(5)H(14)NO(+)·H(2)PO(4) (-), two anions create dimeric structures via two O-H⋯O hydrogen bonds. The hydrogen-bonded dimers are connected by another O-H⋯O hydrogen bond with the hydroxyl groups of the cations, constructing a columner structure along the a axis. A number of C-H⋯O interactions...