wargo@sdcsla.UUCP (Dave Wargo) (09/05/84)
A Standardized Laboratory Preparation of Speiseeis Because of the widely varied nature of the many procedures which have been published in a number of widely varied sources, and the wide variations of those procedures in common use for the preparation of this substance, the authors undertook this investigation to devise a standardized procedure incorporating the better features of the many methods avaible to the experimentor, so at to be able to consistantly get a good product in a high yield. Experimental Into a suitable 5 l. container are added ten unfertilized ova of the Gallus Domesticus animal, weighting in the range 56.7-63.8g. (USDA grad A-large); 500 g. a-D-gluco-pyranosyl-B-D-fructofuranoside, commercial grade; 500 ml. of the mammary secretion of Bos taurus; 235 ml. of a commercial preparation known as 'light cream'; and 250 ml. of a 2.5% ethanolic extraction of the fruit of Vanilla plantifolia. These substances are blended into a homogeneous mess by vigorous stirring for two minutes, then 1400 ml. more Bos secretion is added with constant stirring. The resulting mixture is poured into a 3.8 l. 'White Mountian' brand rotary hand-powered recrystallizer, and colled with a salt-ice mixture to maintain a cooling bath of about -15 C. The 'freezer' is rotated at the speed of 1.25 Hertz for about 15 min. of until the mixture becomes difficult to stir. The inner parts of the crystallizer are removed from the inner can, and the contents of the can allowed to continued freezing at the maintained temperature of -15 C. for at least one hour. Yeald is approximately 3.7 l., m.p. about -5 C. (varies between 90 and 105 % of theory, depending uopn the appetite of the worker). Summary A standard method of making home-made ice cream is here presented using the usual ingredients of eggs, sugar, milk, cream, and flavoring. The amounts given here make one gallon. If other flavors are desired, substitution may be made for the vanilla; two flavors found compatable with this procedure are rum and blackberry. (the preceding article was taken from the "selected papers" of the J.I.R" for your enjoyment).