IRRADIATED MILK: THE ENERGY REQUIREMENTS FOR ANTIRACHITIC ACTIVATION

Irradiated Milk: the Energy Requirements for Antirachitic Activation

The irradiation of milk is a complex problem from the physical, optical, and photochemical standpoint. The knowledge concerning the antirachitic activation of pure sterols with ultra-violet radiation cannot be applied directly to milk for several reasons. The provitamin or activatable substance as it exists in milk is associated with other materials in solution and suspension. Such substances m...

The Antirachitic Value of Irradiated Cholesterol

As is well known, young rats can be regularly protected from rickets by the addition to their dietary of 1 mg. or less of irradiated cholesterol. Various experiences led us to believe that this cholesterol was a mixture of active and inactive material and that an attempt should, therefore, be made to fractionate it. In the first place prolonged irradiation gradually inactivates cholesterol whic...

The Antirachitic Value of Irradiated Choles- Terol and Phytosterol

Fat-soluble Vitamins. Xxx. the Antirachitic Value of Cow’s Milk as Modified by the Feeding of Irradiated Yeast.*

The idea that milk, both cow’s and human, is insufficiently supplied with vitamin D to meet the requirements for good bone building, is widely accepted. The question may well be raised whether too much emphasis is not being placed on vitamin D as the calcifying agent, without keeping in mind that other corrective measures may well be looked for. However, the study of the factors which determine...

A further study of the antirachitic factor in human milk.

Rickets is a common and important complaint in Egypt. The statistics published by Shawki1 show that 50 per cent. of the Egyptian children between the ages of six months and two years have definite clinical manifestations of rickets. Such a high incidence of this disease in a country noted for its clear sky and abundant sunlight is naturally astonishing and the probable etiological factors conce...