In several recent publications 1-6 we have shown experimentally that the acidic groups present in collodion are the primary cause of its electrochemical activity in solutions of strong inorganic electrolytes. The surface concentration of these acidic dissociable groups is assumed to determine the degree of electrochemical activity of any given collodion sample. The abundance of these groups var...

1. Serum calcium is completely diffusible through collodion membranes in 0.8 per cent NaCl at a pH of 7.4. 2. About 55 to 75 per cent of serum Ca is diffusible through collodion membranes in distilled water at a pH of 7.4. 3. Serum Ca is completely diffusible when dialyzed against HCl at a pH of 2.5.

Congenital Ichyosis is relatively uncommon disease but is the most common cause of Collodian baby. Early diagnosis is required for immediate management and prevention of fluid-electrolyte balance as well as prevention of secondary infections. Definitive diagnosis is essential for long-term management as well as counselling to the parents of affected infant if they are considering having childre...

1. Collodion membranes of high polarizability and low resistance can be obtained either by addition of certain ether-soluble substances such as phosphatides, olive oil, mastix, and gum benzoin, to the collodion or by drying collodion membranes for a limited time under pressure. 2. The permeability of membranes of different polarization has been measured by means of conductivity methods. 3. Sint...

A novel extracorporeal immunoadsorbent is described in which anti-bovine serum albumin (anti-BSA) was entrapped in collodion membranes adherent to activated charcoal particles. This immunoadsorbent was capable of specifically removing circulating BSA in vitro and in vivo in an extracorporeal system in dogs. In preparation of the immunoadsorbent, up to 81.2% of added anti-BSA was retained on col...

The reversal of the sign of charge of collodion membranes (treated previously with a protein) by hydrogen ions has been discussed in a preceding paper 1 and in this paper the influence of trivalent cations on the reversal will be considered. We shall omit the discussion of the action of tetravalent cations (e.g. ThC14) since their soiutions have so high a concentration of hydrogen ions that thi...