Articles written in Proceedings – Section A
Volume 27 Issue 5 May 1948 pp 366-374
Production of formaldehyde by the interaction of carbon monoxide and hydrogen under silent discharge at 500 cycles frequency has been investigated with respect to (1) the gas composition, (2) the rate of circulation, (3) the ozoniser size and (4) the excitation potential. The gas mixture was circulated through the reaction vessel at atmospheric pressure and formaldehyde was removed from the effluent gases by scrubbing through water wash traps. The optimum values for formaldehyde formation in respect of factors 1 to 4 have been determined. An increase above this value of 2 decreases the yield due to (in part) incomplete absorption of the product. A larger ozoniser size increases the net yield but entails a waste of the reacting mixture. Increase of the excitation potential increases the velocity of the change but reduces the yield due to secondary changes in the formaldehyde produced. Equimolecular mixtures of the reacting gases with optimum values under 2, 3 and 4 correspond to 0·046 gm.,
Volume 32 Issue 6 December 1950 pp 402-408
A new method for the determination of rubin numbers has been advanced. The previous method based on the measurement of the blue colour was discarded as the blue dye was found to be in suspension. The rubin number of a protective colloid is defined as the number of milligrams of that colloid which when present in 10 c.c. of 0·002% congo rubin solution of pH 5·1 produces 9·0 Lovibond units of red colour in a 0·6″ cell on addition of 1 c.c. of 10% sodium chloride and centrifuging. The results obtained by this method in the case of starch, casein and albumin show the same trend as the results of the earlier methods.
Volume 33 Issue 5 May 1951 pp 298-304
A method has been described for measuring small alternating currents. This has been applied for studying the a.c. currents induced in a dropping mercury electrode system containing nickel ions when subjected to a pulsating field at different frequencies of the field. This system has revealed interesting features which are different from the systems investigated by the previous workers.
Volume 33 Issue 5 May 1951 pp 316-324
The discharge of the lead ions at the dropping mercury electrode has been studied by the Breyer and Gutman technique at different frequencies. This system has revealed interesting features which are different from the systems investigated by others. The results have been interpreted taking into account the kinetics of discharge of the lead ion at the electrode.
Volume 34 Issue 1 July 1951 pp 49-53
The rubin number of some hydroxy compounds has been determined. It is found that the disaccharides have a better protective action on congo rubin than the monosaccharides.
Volume 35 Issue 1 January 1952 pp 27-33
Volume 35 Issue 4 April 1952 pp 173-177