259. A note on a simple and accurate viscosimetric form of rennet test

Abstract

Since publication (1) the apparatus previously described by the authors has been altered and improved. The alterations have been concerned mainly with excluding draughts and securing a better form of support. In using the apparatus we have found that the absence of vibration is important for the agreement of duplicates. It would seem that vibration tends to break the cohesion between the curd and the surface of cylinder A. For this reason a part of the laboratory as free as possible from vibrational disturbances was chosen and the support fixed to the wall.

718. Renneting and the caseinate particle: a viscometric study

“…Following 5 min. of stirring, the solution was brought to pH [6][7][8] with N/1 NaOH and then heated quickly to 80° C. to inactivate native proteases of the milk (13). This process generally removed the alcohol and acetone and brought into solution any undissolved particles.…”

“…Viscometric analyses have been used to measure the rate of clotting of milk (3,4,5,6,7) and to gain specific information about the phases of the renneting processes. On the basis of viscometric study of solutions of casein in NaOH, Jirgensons (8) suggested that casein particles decreased in symmetry (i.e.…”

634. The determination of the coagulating power of commercial rennet extracts using an automatic tester

“…Similarly, an automatic coagulation time recorder was developed modelled on the principle used by Randall (2) in an apparatus for testing heparin. This instrument promised considerable advantages in convenience and accuracy over previously described forms of apparatus (3,4,5,6,7,8,9).…”