The biochemist has been aided greatly in recent years in developing his knowledge of the metabolism of organic and inorganic substances in biological systems through the use of isotopes as tracers. Since the chemical properties of an element are determined…

It would appear, from a review of the literature on trichinosis, that the majority of the experiments, concerning the effects of chemical and physica~ agents on larvae of Trichinella spiralis, have been carried out, in vivo. On the other hand,…

One of the factors which runs like a thread through the whole fabric of history is manfs inborn desire to seek the unknown, whether it be new fields of knowledge or a virgin land where never before the foot of…

Knowledge o£ the importance or a nutritional factor in the etiology of rickets may be said to date from the pioneer work of Mellanby in 1919. The therapeutic value of fish oils tor rickets. although recognized for centuries~ was shown…

In our society a man’s occupation is of prime importance in his life. It determines his social and economic status, his associates, his leisure activities, hie entire mode or life. Discrepancy between the kind of job a person has and…

Microchem1cal analysis 1s one of the many methode used in the chemical examonat1on of minerale. This method requires a petrigraphie microscope and also a knowledge of optical moneralogy. Since the mocrochemical method requires only a small sample, it is preferable…