CYCLOPROPANE AND DIATHERMY

Cyclopropane Anæsthesia

TLHIS paper is based on my experience of one thousand cases of cyclopropane anaesthesia personally conducted by me since October, 1938, both in hospital and in private. But before discussing these it might be convenient for me to mention here something about the drug itself. HISTORY. Cyclopropane was first isolated in Germany in 1882 by Freund, who also demonstrated its chemical structure, C 3H...

Cyclopropane Anesthesia

Short-Wave Diathermy

A good estimate of the value and interest of this book would be for one to attempt to review the large volume of literature on the subject of the development and uses of shortwave diathermy, which the author has studiously done. He has gleaned the rapidly accumulating published work of the past decade, previous to which little or nothing was written on the subject. An extensive bibliography is ...

Biosynthesis of Cyclopropane Compounds

Oleic acid was converted to dihydrosterculic acid (9,10methyleneoctadecanoic acid) by Lactobacillus arabinosus cells. This was established by the mass spectra of branched chain esters formed by reductive opening of the cyclopropane ring of the corresponding cyclopropane fatty esters. The mass spectra allowed unambiguous assignment of the ring location to position 9,10. Oleic acid-9,10-d2 was co...

Biosynthesis of Cyclopropane Compounds

Several natural and synthetic phospholipids can serve as substrates for the cyclopropane synthetase enzyme of Closfridium bufyricum. The conditions for optimum substrate effectiveness vary with the substrate; e.g. an anionic surfaceactive agent is necessary with phosphatidylethanolamine, while divalent cations stimulate the rate of reaction with anionic phospholipids. These variable conditions ...