Volume 1, Issue 2
August 1934, pages 49-122
pp 49-72 August 1934
pp 73-79 August 1934
The albumin and the globulin inLathyrus sativus and the globulin inVicia sativa were prepared by different methods and their properties studied.
The globulin inLathyrus sativus contains more of histidine and less of arginine than the corresponding protein fromvicia sativa. The tyrosine and tryptophane contents are about the same in all the cases. The albumin fromLathyrus sativus is richer in cystine than the other preparations.
Fractionation of the globulins ofVicia sativa by increasing salt saturation showed that none of the preparations contained any phosphorus. Small quantities of that element present in preparations obtained by the usual standard methods of dilution or dialysis, especially the latter, are traceable to impurities, adsorbed or otherwise retained by the protein. These and the related observations would suggest that the whole question of “phospho-globulins” of vegetable origin require careful re-enquiry.
After removal of the globulins (as in 3), a small quantity of a fraction (albumin?) containing 6·7 per cent. of nitrogen and 10 per cent. of phosphorus was obtained. The mode of association of phosphorus with this preparation is under investigation.
pp 80-96 August 1934
pp 97-99 August 1934
Leptocoma Zeylanica (Lin.) is parasitised by a Hæmoproteus which we consider a new species and nameH. Raymundi. The interest lies in its particularly simple schizogonic cycle. Merozoites arise as a result of the nuclear division of free trophozoites and the former remain free among the cells of the host tissue. They finally attack the red blood corpuscles as schizonts. In spite of careful research, we have been unable to detect an intracellular stage at any phase of the schizogonic cycle.
pp 101-105 August 1934
A dilatometric study of the enzymic hydrolysis of soluble starch by malt diastase has been conducted employing four different concentrations of the substrate. It has been shown that the kinetics of the reaction can be conveniently followed in the dilatometer.
2. The dilatometric depression is shown to be proportional to the corresponding release of maltose on the one hand, and the fall in rotation on the other.
3. The dilatometric depression per millimol release of maltose is 3·9 mm.3 while the depression per degree fall in rotation is 6·8 mm.3 A determination of these data is being extended to other allied systems with a view to understand their significance.
pp 106-122 August 1934