Anion Exchange Renders Hydrophobic Capsules and Cargoes Water-Soluble

Folded alkyl chains in water-soluble capsules and cavitands.

A deep cavitand with ionic "feet" dimerizes around hydrophobic compounds in D2O. Longer n-alkane guests, C14-C18, are encapsulated in contorted conformations and NMR is used to deduce their shapes. Competition experiments establish the driving forces involved and how they compensate for the steric clashes in the folded structures of the encapsulated alkanes. Bolaamphiphiles instead prefer to bi...

Anion Exchangers for Water Treatment: Ion Exchange

ation sciences is the puriRcation and recovery of solvents especially from HPLC and GPC usage. There is a range of equipment supplied for recycling of solvents and useful sources of information can be found on the internet, for example the web pages for B/R Instruments and Recycling Sciences are included in the Further Reading. The applications of distillation in analysis are widespread, with t...

Intestinal anion exchange in teleost water balance.

Simultaneous measurements of all major electrolytes including HCO3(-) and H+ as well as water demonstrated that fluids absorbed by the anterior intestine of the marine gulf toadfish under in vivo-like conditions on an overall net basis are hypertonic at 380 mOsm and acidic ([H+] = 27 mM). This unusual composition of fluids absorbed across the intestinal epithelium is due to the unusual intestin...

Hydrophobic shell loading of biopolyelectrolyte capsules.

Purification of anthrax-toxin components by high-performance anion-exchange, gel-filtration and hydrophobic-interaction chromatography.

A procedure has been developed for purification of the tripartite anthrax-toxin components. This involves sequential high-performance anion-exchange, gel-filtration and hydrophobic-interaction chromatography. From an initial culture volume of 15 litres, typical yields of 8 mg of protective antigen, 13 mg of lethal factor and 7 mg of oedema factor are produced to higher degrees of purity than ha...